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Qi Wang 2018-05-08 12:12:50 -07:00
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2
.gitignore vendored
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@ -77,12 +77,14 @@ test/include/test/jemalloc_test_defs.h
*.pdb
*.sdf
*.opendb
*.VC.db
*.opensdf
*.cachefile
*.suo
*.user
*.sln.docstates
*.tmp
.vs/
/msvc/Win32/
/msvc/x64/
/msvc/projects/*/*/Debug*/

1
.travis.yml
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@ -1,4 +1,5 @@
language: generic
dist: precise
matrix:
include:

4
COPYING
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@ -1,10 +1,10 @@
Unless otherwise specified, files in the jemalloc source distribution are
subject to the following license:
--------------------------------------------------------------------------------
Copyright (C) 2002-2017 Jason Evans <jasone@canonware.com>.
Copyright (C) 2002-2018 Jason Evans <jasone@canonware.com>.
All rights reserved.
Copyright (C) 2007-2012 Mozilla Foundation. All rights reserved.
Copyright (C) 2009-2017 Facebook, Inc. All rights reserved.
Copyright (C) 2009-2018 Facebook, Inc. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

121
ChangeLog
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@ -4,6 +4,123 @@ brevity. Much more detail can be found in the git revision history:
https://github.com/jemalloc/jemalloc
* 5.1.0 (May 4th, 2018)
This release is primarily about fine-tuning, ranging from several new features
to numerous notable performance and portability enhancements. The release and
prior dev versions have been running in multiple large scale applications for
months, and the cumulative improvements are substantial in many cases.
Given the long and successful production runs, this release is likely a good
candidate for applications to upgrade, from both jemalloc 5.0 and before. For
performance-critical applications, the newly added TUNING.md provides
guidelines on jemalloc tuning.
New features:
- Implement transparent huge page support for internal metadata. (@interwq)
- Add opt.thp to allow enabling / disabling transparent huge pages for all
mappings. (@interwq)
- Add maximum background thread count option. (@djwatson)
- Allow prof_active to control opt.lg_prof_interval and prof.gdump.
(@interwq)
- Allow arena index lookup based on allocation addresses via mallctl.
(@lionkov)
- Allow disabling initial-exec TLS model. (@davidtgoldblatt, @KenMacD)
- Add opt.lg_extent_max_active_fit to set the max ratio between the size of
the active extent selected (to split off from) and the size of the requested
allocation. (@interwq, @davidtgoldblatt)
- Add retain_grow_limit to set the max size when growing virtual address
space. (@interwq)
- Add mallctl interfaces:
+ arena.<i>.retain_grow_limit (@interwq)
+ arenas.lookup (@lionkov)
+ max_background_threads (@djwatson)
+ opt.lg_extent_max_active_fit (@interwq)
+ opt.max_background_threads (@djwatson)
+ opt.metadata_thp (@interwq)
+ opt.thp (@interwq)
+ stats.metadata_thp (@interwq)
Portability improvements:
- Support GNU/kFreeBSD configuration. (@paravoid)
- Support m68k, nios2 and SH3 architectures. (@paravoid)
- Fall back to FD_CLOEXEC when O_CLOEXEC is unavailable. (@zonyitoo)
- Fix symbol listing for cross-compiling. (@tamird)
- Fix high bits computation on ARM. (@davidtgoldblatt, @paravoid)
- Disable the CPU_SPINWAIT macro for Power. (@davidtgoldblatt, @marxin)
- Fix MSVC 2015 & 2017 builds. (@rustyx)
- Improve RISC-V support. (@EdSchouten)
- Set name mangling script in strict mode. (@nicolov)
- Avoid MADV_HUGEPAGE on ARM. (@marxin)
- Modify configure to determine return value of strerror_r.
(@davidtgoldblatt, @cferris1000)
- Make sure CXXFLAGS is tested with CPP compiler. (@nehaljwani)
- Fix 32-bit build on MSVC. (@rustyx)
- Fix external symbol on MSVC. (@maksqwe)
- Avoid a printf format specifier warning. (@jasone)
- Add configure option --disable-initial-exec-tls which can allow jemalloc to
be dynamically loaded after program startup. (@davidtgoldblatt, @KenMacD)
- AArch64: Add ILP32 support. (@cmuellner)
- Add --with-lg-vaddr configure option to support cross compiling.
(@cmuellner, @davidtgoldblatt)
Optimizations and refactors:
- Improve active extent fit with extent_max_active_fit. This considerably
reduces fragmentation over time and improves virtual memory and metadata
usage. (@davidtgoldblatt, @interwq)
- Eagerly coalesce large extents to reduce fragmentation. (@interwq)
- sdallocx: only read size info when page aligned (i.e. possibly sampled),
which speeds up the sized deallocation path significantly. (@interwq)
- Avoid attempting new mappings for in place expansion with retain, since
it rarely succeeds in practice and causes high overhead. (@interwq)
- Refactor OOM handling in newImpl. (@wqfish)
- Add internal fine-grained logging functionality for debugging use.
(@davidtgoldblatt)
- Refactor arena / tcache interactions. (@davidtgoldblatt)
- Refactor extent management with dumpable flag. (@davidtgoldblatt)
- Add runtime detection of lazy purging. (@interwq)
- Use pairing heap instead of red-black tree for extents_avail. (@djwatson)
- Use sysctl on startup in FreeBSD. (@trasz)
- Use thread local prng state instead of atomic. (@djwatson)
- Make decay to always purge one more extent than before, because in
practice large extents are usually the ones that cross the decay threshold.
Purging the additional extent helps save memory as well as reduce VM
fragmentation. (@interwq)
- Fast division by dynamic values. (@davidtgoldblatt)
- Improve the fit for aligned allocation. (@interwq, @edwinsmith)
- Refactor extent_t bitpacking. (@rkmisra)
- Optimize the generated assembly for ticker operations. (@davidtgoldblatt)
- Convert stats printing to use a structured text emitter. (@davidtgoldblatt)
- Remove preserve_lru feature for extents management. (@djwatson)
- Consolidate two memory loads into one on the fast deallocation path.
(@davidtgoldblatt, @interwq)
Bug fixes (most of the issues are only relevant to jemalloc 5.0):
- Fix deadlock with multithreaded fork in OS X. (@davidtgoldblatt)
- Validate returned file descriptor before use. (@zonyitoo)
- Fix a few background thread initialization and shutdown issues. (@interwq)
- Fix an extent coalesce + decay race by taking both coalescing extents off
the LRU list. (@interwq)
- Fix potentially unbound increase during decay, caused by one thread keep
stashing memory to purge while other threads generating new pages. The
number of pages to purge is checked to prevent this. (@interwq)
- Fix a FreeBSD bootstrap assertion. (@strejda, @interwq)
- Handle 32 bit mutex counters. (@rkmisra)
- Fix a indexing bug when creating background threads. (@davidtgoldblatt,
@binliu19)
- Fix arguments passed to extent_init. (@yuleniwo, @interwq)
- Fix addresses used for ordering mutexes. (@rkmisra)
- Fix abort_conf processing during bootstrap. (@interwq)
- Fix include path order for out-of-tree builds. (@cmuellner)
Incompatible changes:
- Remove --disable-thp. (@interwq)
- Remove mallctl interfaces:
+ config.thp (@interwq)
Documentation:
- Add TUNING.md. (@interwq, @davidtgoldblatt, @djwatson)
* 5.0.1 (July 1, 2017)
This bugfix release fixes several issues, most of which are obscure enough
@ -22,7 +139,7 @@ brevity. Much more detail can be found in the git revision history:
unlikely to be an issue with other libc implementations. (@interwq)
- Mask signals during background thread creation. This prevents signals from
being inadvertently delivered to background threads. (@jasone,
@davidgoldblatt, @interwq)
@davidtgoldblatt, @interwq)
- Avoid inactivity checks within background threads, in order to prevent
recursive mutex acquisition. (@interwq)
- Fix extent_grow_retained() to use the specified hooks when the
@ -515,7 +632,7 @@ brevity. Much more detail can be found in the git revision history:
these fixes, xallocx() now tries harder to partially fulfill requests for
optional extra space. Note that a couple of minor heap profiling
optimizations are included, but these are better thought of as performance
fixes that were integral to disovering most of the other bugs.
fixes that were integral to discovering most of the other bugs.
Optimizations:
- Avoid a chunk metadata read in arena_prof_tctx_set(), since it is in the

22
INSTALL.md
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@ -157,11 +157,6 @@ any of the following arguments (not a definitive list) to 'configure':
Statically link against the specified libunwind.a rather than dynamically
linking with -lunwind.
* `--disable-thp`
Disable transparent huge page (THP) integration. This option can be useful
when cross compiling.
* `--disable-fill`
Disable support for junk/zero filling of memory. See the "opt.junk" and
@ -265,6 +260,22 @@ any of the following arguments (not a definitive list) to 'configure':
configuration, jemalloc will provide additional size classes that are not
16-byte-aligned (24, 40, and 56).
* `--with-lg-vaddr=<lg-vaddr>`
Specify the number of significant virtual address bits. By default, the
configure script attempts to detect virtual address size on those platforms
where it knows how, and picks a default otherwise. This option may be
useful when cross-compiling.
* `--disable-initial-exec-tls`
Disable the initial-exec TLS model for jemalloc's internal thread-local
storage (on those platforms that support explicit settings). This can allow
jemalloc to be dynamically loaded after program startup (e.g. using dlopen).
Note that in this case, there will be two malloc implementations operating
in the same process, which will almost certainly result in confusing runtime
crashes if pointers leak from one implementation to the other.
The following environment variables (not a definitive list) impact configure's
behavior:
@ -329,6 +340,7 @@ To install only parts of jemalloc, use the following targets:
install_include
install_lib_shared
install_lib_static
install_lib_pc
install_lib
install_doc_html
install_doc_man

10
Makefile.in
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@ -24,7 +24,7 @@ abs_srcroot := @abs_srcroot@
abs_objroot := @abs_objroot@
# Build parameters.
CPPFLAGS := @CPPFLAGS@ -I$(srcroot)include -I$(objroot)include
CPPFLAGS := @CPPFLAGS@ -I$(objroot)include -I$(srcroot)include
CONFIGURE_CFLAGS := @CONFIGURE_CFLAGS@
SPECIFIED_CFLAGS := @SPECIFIED_CFLAGS@
EXTRA_CFLAGS := @EXTRA_CFLAGS@
@ -93,15 +93,18 @@ C_SRCS := $(srcroot)src/jemalloc.c \
$(srcroot)src/arena.c \
$(srcroot)src/background_thread.c \
$(srcroot)src/base.c \
$(srcroot)src/bin.c \
$(srcroot)src/bitmap.c \
$(srcroot)src/ckh.c \
$(srcroot)src/ctl.c \
$(srcroot)src/div.c \
$(srcroot)src/extent.c \
$(srcroot)src/extent_dss.c \
$(srcroot)src/extent_mmap.c \
$(srcroot)src/hash.c \
$(srcroot)src/hooks.c \
$(srcroot)src/large.c \
$(srcroot)src/log.c \
$(srcroot)src/malloc_io.c \
$(srcroot)src/mutex.c \
$(srcroot)src/mutex_pool.c \
@ -111,7 +114,6 @@ C_SRCS := $(srcroot)src/jemalloc.c \
$(srcroot)src/prof.c \
$(srcroot)src/rtree.c \
$(srcroot)src/stats.c \
$(srcroot)src/spin.c \
$(srcroot)src/sz.c \
$(srcroot)src/tcache.c \
$(srcroot)src/ticker.c \
@ -160,10 +162,13 @@ TESTS_UNIT := \
$(srcroot)test/unit/arena_reset.c \
$(srcroot)test/unit/atomic.c \
$(srcroot)test/unit/background_thread.c \
$(srcroot)test/unit/background_thread_enable.c \
$(srcroot)test/unit/base.c \
$(srcroot)test/unit/bitmap.c \
$(srcroot)test/unit/ckh.c \
$(srcroot)test/unit/decay.c \
$(srcroot)test/unit/div.c \
$(srcroot)test/unit/emitter.c \
$(srcroot)test/unit/extent_quantize.c \
$(srcroot)test/unit/fork.c \
$(srcroot)test/unit/hash.c \
@ -171,6 +176,7 @@ TESTS_UNIT := \
$(srcroot)test/unit/junk.c \
$(srcroot)test/unit/junk_alloc.c \
$(srcroot)test/unit/junk_free.c \
$(srcroot)test/unit/log.c \
$(srcroot)test/unit/mallctl.c \
$(srcroot)test/unit/malloc_io.c \
$(srcroot)test/unit/math.c \

129
TUNING.md Normal file
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@ -0,0 +1,129 @@
This document summarizes the common approaches for performance fine tuning with
jemalloc (as of 5.1.0). The default configuration of jemalloc tends to work
reasonably well in practice, and most applications should not have to tune any
options. However, in order to cover a wide range of applications and avoid
pathological cases, the default setting is sometimes kept conservative and
suboptimal, even for many common workloads. When jemalloc is properly tuned for
a specific application / workload, it is common to improve system level metrics
by a few percent, or make favorable trade-offs.
## Notable runtime options for performance tuning
Runtime options can be set via
[malloc_conf](http://jemalloc.net/jemalloc.3.html#tuning).
* [background_thread](http://jemalloc.net/jemalloc.3.html#background_thread)
Enabling jemalloc background threads generally improves the tail latency for
application threads, since unused memory purging is shifted to the dedicated
background threads. In addition, unintended purging delay caused by
application inactivity is avoided with background threads.
Suggested: `background_thread:true` when jemalloc managed threads can be
allowed.
* [metadata_thp](http://jemalloc.net/jemalloc.3.html#opt.metadata_thp)
Allowing jemalloc to utilize transparent huge pages for its internal
metadata usually reduces TLB misses significantly, especially for programs
with large memory footprint and frequent allocation / deallocation
activities. Metadata memory usage may increase due to the use of huge
pages.
Suggested for allocation intensive programs: `metadata_thp:auto` or
`metadata_thp:always`, which is expected to improve CPU utilization at a
small memory cost.
* [dirty_decay_ms](http://jemalloc.net/jemalloc.3.html#opt.dirty_decay_ms) and
[muzzy_decay_ms](http://jemalloc.net/jemalloc.3.html#opt.muzzy_decay_ms)
Decay time determines how fast jemalloc returns unused pages back to the
operating system, and therefore provides a fairly straightforward trade-off
between CPU and memory usage. Shorter decay time purges unused pages faster
to reduces memory usage (usually at the cost of more CPU cycles spent on
purging), and vice versa.
Suggested: tune the values based on the desired trade-offs.
* [narenas](http://jemalloc.net/jemalloc.3.html#opt.narenas)
By default jemalloc uses multiple arenas to reduce internal lock contention.
However high arena count may also increase overall memory fragmentation,
since arenas manage memory independently. When high degree of parallelism
is not expected at the allocator level, lower number of arenas often
improves memory usage.
Suggested: if low parallelism is expected, try lower arena count while
monitoring CPU and memory usage.
* [percpu_arena](http://jemalloc.net/jemalloc.3.html#opt.percpu_arena)
Enable dynamic thread to arena association based on running CPU. This has
the potential to improve locality, e.g. when thread to CPU affinity is
present.
Suggested: try `percpu_arena:percpu` or `percpu_arena:phycpu` if
thread migration between processors is expected to be infrequent.
Examples:
* High resource consumption application, prioritizing CPU utilization:
`background_thread:true,metadata_thp:auto` combined with relaxed decay time
(increased `dirty_decay_ms` and / or `muzzy_decay_ms`,
e.g. `dirty_decay_ms:30000,muzzy_decay_ms:30000`).
* High resource consumption application, prioritizing memory usage:
`background_thread:true` combined with shorter decay time (decreased
`dirty_decay_ms` and / or `muzzy_decay_ms`,
e.g. `dirty_decay_ms:5000,muzzy_decay_ms:5000`), and lower arena count
(e.g. number of CPUs).
* Low resource consumption application:
`narenas:1,lg_tcache_max:13` combined with shorter decay time (decreased
`dirty_decay_ms` and / or `muzzy_decay_ms`,e.g.
`dirty_decay_ms:1000,muzzy_decay_ms:0`).
* Extremely conservative -- minimize memory usage at all costs, only suitable when
allocation activity is very rare:
`narenas:1,tcache:false,dirty_decay_ms:0,muzzy_decay_ms:0`
Note that it is recommended to combine the options with `abort_conf:true` which
aborts immediately on illegal options.
## Beyond runtime options
In addition to the runtime options, there are a number of programmatic ways to
improve application performance with jemalloc.
* [Explicit arenas](http://jemalloc.net/jemalloc.3.html#arenas.create)
Manually created arenas can help performance in various ways, e.g. by
managing locality and contention for specific usages. For example,
applications can explicitly allocate frequently accessed objects from a
dedicated arena with
[mallocx()](http://jemalloc.net/jemalloc.3.html#MALLOCX_ARENA) to improve
locality. In addition, explicit arenas often benefit from individually
tuned options, e.g. relaxed [decay
time](http://jemalloc.net/jemalloc.3.html#arena.i.dirty_decay_ms) if
frequent reuse is expected.
* [Extent hooks](http://jemalloc.net/jemalloc.3.html#arena.i.extent_hooks)
Extent hooks allow customization for managing underlying memory. One use
case for performance purpose is to utilize huge pages -- for example,
[HHVM](https://github.com/facebook/hhvm/blob/master/hphp/util/alloc.cpp)
uses explicit arenas with customized extent hooks to manage 1GB huge pages
for frequently accessed data, which reduces TLB misses significantly.
* [Explicit thread-to-arena
binding](http://jemalloc.net/jemalloc.3.html#thread.arena)
It is common for some threads in an application to have different memory
access / allocation patterns. Threads with heavy workloads often benefit
from explicit binding, e.g. binding very active threads to dedicated arenas
may reduce contention at the allocator level.

2
bin/jeprof.in
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@ -2895,6 +2895,8 @@ sub RemoveUninterestingFrames {
foreach my $name ('@JEMALLOC_PREFIX@calloc',
'cfree',
'@JEMALLOC_PREFIX@malloc',
'newImpl',
'void* newImpl',
'@JEMALLOC_PREFIX@free',
'@JEMALLOC_PREFIX@memalign',
'@JEMALLOC_PREFIX@posix_memalign',

161
configure.ac
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@ -10,7 +10,7 @@ dnl Custom macro definitions.
dnl JE_CONCAT_VVV(r, a, b)
dnl
dnl Set $r to the concatenation of $a and $b, with a space separating them iff
dnl both $a and $b are non-emty.
dnl both $a and $b are non-empty.
AC_DEFUN([JE_CONCAT_VVV],
if test "x[$]{$2}" = "x" -o "x[$]{$3}" = "x" ; then
$1="[$]{$2}[$]{$3}"
@ -76,6 +76,7 @@ AC_MSG_CHECKING([whether compiler supports $1])
T_CONFIGURE_CXXFLAGS="${CONFIGURE_CXXFLAGS}"
JE_APPEND_VS(CONFIGURE_CXXFLAGS, $1)
JE_CONCAT_VVV(CXXFLAGS, CONFIGURE_CXXFLAGS, SPECIFIED_CXXFLAGS)
AC_LANG_PUSH([C++])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[
]], [[
@ -87,6 +88,7 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
AC_MSG_RESULT([no])
[CONFIGURE_CXXFLAGS="${T_CONFIGURE_CXXFLAGS}"]
)
AC_LANG_POP([C++])
JE_CONCAT_VVV(CXXFLAGS, CONFIGURE_CXXFLAGS, SPECIFIED_CXXFLAGS)
])
@ -243,6 +245,7 @@ if test "x$GCC" = "xyes" ; then
JE_CFLAGS_ADD([-Wshorten-64-to-32])
JE_CFLAGS_ADD([-Wsign-compare])
JE_CFLAGS_ADD([-Wundef])
JE_CFLAGS_ADD([-Wno-format-zero-length])
JE_CFLAGS_ADD([-pipe])
JE_CFLAGS_ADD([-g3])
elif test "x$je_cv_msvc" = "xyes" ; then
@ -380,6 +383,7 @@ dnl CPU-specific settings.
CPU_SPINWAIT=""
case "${host_cpu}" in
i686|x86_64)
HAVE_CPU_SPINWAIT=1
if test "x${je_cv_msvc}" = "xyes" ; then
AC_CACHE_VAL([je_cv_pause_msvc],
[JE_COMPILABLE([pause instruction MSVC], [],
@ -398,22 +402,33 @@ case "${host_cpu}" in
fi
fi
;;
powerpc*)
AC_DEFINE_UNQUOTED([HAVE_ALTIVEC], [ ])
CPU_SPINWAIT='__asm__ volatile("or 31,31,31")'
;;
*)
HAVE_CPU_SPINWAIT=0
;;
esac
AC_DEFINE_UNQUOTED([HAVE_CPU_SPINWAIT], [$HAVE_CPU_SPINWAIT])
AC_DEFINE_UNQUOTED([CPU_SPINWAIT], [$CPU_SPINWAIT])
AC_ARG_WITH([lg_vaddr],
[AS_HELP_STRING([--with-lg-vaddr=<lg-vaddr>], [Number of significant virtual address bits])],
[LG_VADDR="$with_lg_vaddr"], [LG_VADDR="detect"])
case "${host_cpu}" in
aarch64)
if test "x$LG_VADDR" = "xdetect"; then
AC_MSG_CHECKING([number of significant virtual address bits])
if test "x${LG_SIZEOF_PTR}" = "x2" ; then
#aarch64 ILP32
LG_VADDR=32
else
#aarch64 LP64
LG_VADDR=48
fi
AC_MSG_RESULT([$LG_VADDR])
fi
;;
x86_64)
if test "x$LG_VADDR" = "xdetect"; then
AC_CACHE_CHECK([number of significant virtual address bits],
[je_cv_lg_vaddr],
AC_RUN_IFELSE([AC_LANG_PROGRAM(
@ -461,8 +476,10 @@ typedef unsigned __int32 uint32_t;
else
AC_MSG_ERROR([cannot determine number of significant virtual address bits])
fi
fi
;;
*)
if test "x$LG_VADDR" = "xdetect"; then
AC_MSG_CHECKING([number of significant virtual address bits])
if test "x${LG_SIZEOF_PTR}" = "x3" ; then
LG_VADDR=64
@ -474,6 +491,7 @@ typedef unsigned __int32 uint32_t;
AC_MSG_ERROR([Unsupported lg(pointer size): ${LG_SIZEOF_PTR}])
fi
AC_MSG_RESULT([$LG_VADDR])
fi
;;
esac
AC_DEFINE_UNQUOTED([LG_VADDR], [$LG_VADDR])
@ -561,7 +579,7 @@ case "${host}" in
dnl syscall(2) and secure_getenv(3) are exposed by _GNU_SOURCE.
JE_APPEND_VS(CPPFLAGS, -D_GNU_SOURCE)
abi="elf"
AC_DEFINE([JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS])
AC_DEFINE([JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS], [ ])
AC_DEFINE([JEMALLOC_HAS_ALLOCA_H])
AC_DEFINE([JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY], [ ])
AC_DEFINE([JEMALLOC_THREADED_INIT], [ ])
@ -571,11 +589,11 @@ case "${host}" in
default_retain="1"
fi
;;
*-*-linux* | *-*-kfreebsd*)
*-*-linux*)
dnl syscall(2) and secure_getenv(3) are exposed by _GNU_SOURCE.
JE_APPEND_VS(CPPFLAGS, -D_GNU_SOURCE)
abi="elf"
AC_DEFINE([JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS])
AC_DEFINE([JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS], [ ])
AC_DEFINE([JEMALLOC_HAS_ALLOCA_H])
AC_DEFINE([JEMALLOC_PROC_SYS_VM_OVERCOMMIT_MEMORY], [ ])
AC_DEFINE([JEMALLOC_THREADED_INIT], [ ])
@ -584,6 +602,15 @@ case "${host}" in
default_retain="1"
fi
;;
*-*-kfreebsd*)
dnl syscall(2) and secure_getenv(3) are exposed by _GNU_SOURCE.
JE_APPEND_VS(CPPFLAGS, -D_GNU_SOURCE)
abi="elf"
AC_DEFINE([JEMALLOC_HAS_ALLOCA_H])
AC_DEFINE([JEMALLOC_SYSCTL_VM_OVERCOMMIT], [ ])
AC_DEFINE([JEMALLOC_THREADED_INIT], [ ])
AC_DEFINE([JEMALLOC_USE_CXX_THROW], [ ])
;;
*-*-netbsd*)
AC_MSG_CHECKING([ABI])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
@ -722,12 +749,9 @@ JE_COMPILABLE([tls_model attribute], [],
foo = 0;],
[je_cv_tls_model])
JE_CFLAGS_RESTORE()
if test "x${je_cv_tls_model}" = "xyes" ; then
AC_DEFINE([JEMALLOC_TLS_MODEL],
[__attribute__((tls_model("initial-exec")))])
else
AC_DEFINE([JEMALLOC_TLS_MODEL], [ ])
fi
dnl (Setting of JEMALLOC_TLS_MODEL is done later, after we've checked for
dnl --disable-initial-exec-tls)
dnl Check for alloc_size attribute support.
JE_CFLAGS_SAVE()
JE_CFLAGS_ADD([-Werror])
@ -1237,6 +1261,21 @@ if test "x$enable_cache_oblivious" = "x1" ; then
fi
AC_SUBST([enable_cache_oblivious])
dnl Do not log by default.
AC_ARG_ENABLE([log],
[AS_HELP_STRING([--enable-log], [Support debug logging])],
[if test "x$enable_log" = "xno" ; then
enable_log="0"
else
enable_log="1"
fi
],
[enable_log="0"]
)
if test "x$enable_log" = "x1" ; then
AC_DEFINE([JEMALLOC_LOG], [ ])
fi
AC_SUBST([enable_log])
JE_COMPILABLE([a program using __builtin_unreachable], [
@ -1800,6 +1839,15 @@ if test "x${je_cv_madvise}" = "xyes" ; then
], [je_cv_madv_free])
if test "x${je_cv_madv_free}" = "xyes" ; then
AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
elif test "x${je_cv_madvise}" = "xyes" ; then
case "${host_cpu}" in i686|x86_64)
case "${host}" in *-*-linux*)
AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
AC_DEFINE([JEMALLOC_DEFINE_MADVISE_FREE], [ ])
;;
esac
;;
esac
fi
dnl Check for madvise(..., MADV_DONTNEED).
@ -1812,6 +1860,17 @@ if test "x${je_cv_madvise}" = "xyes" ; then
AC_DEFINE([JEMALLOC_PURGE_MADVISE_DONTNEED], [ ])
fi
dnl Check for madvise(..., MADV_DO[NT]DUMP).
JE_COMPILABLE([madvise(..., MADV_DO[[NT]]DUMP)], [
#include <sys/mman.h>
], [
madvise((void *)0, 0, MADV_DONTDUMP);
madvise((void *)0, 0, MADV_DODUMP);
], [je_cv_madv_dontdump])
if test "x${je_cv_madv_dontdump}" = "xyes" ; then
AC_DEFINE([JEMALLOC_MADVISE_DONTDUMP], [ ])
fi
dnl Check for madvise(..., MADV_[NO]HUGEPAGE).
JE_COMPILABLE([madvise(..., MADV_[[NO]]HUGEPAGE)], [
#include <sys/mman.h>
@ -1819,29 +1878,17 @@ if test "x${je_cv_madvise}" = "xyes" ; then
madvise((void *)0, 0, MADV_HUGEPAGE);
madvise((void *)0, 0, MADV_NOHUGEPAGE);
], [je_cv_thp])
case "${host_cpu}" in
arm*)
;;
*)
if test "x${je_cv_thp}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_MADVISE_HUGE], [ ])
fi
;;
esac
fi
dnl Enable transparent huge page support by default.
AC_ARG_ENABLE([thp],
[AS_HELP_STRING([--disable-thp],
[Disable transparent huge page support])],
[if test "x$enable_thp" = "xno" -o "x${je_cv_thp}" != "xyes" ; then
enable_thp="0"
else
enable_thp="1"
fi
],
[if test "x${je_cv_thp}" = "xyes" ; then
enable_thp="1"
else
enable_thp="0"
fi
])
if test "x$enable_thp" = "x1" ; then
AC_DEFINE([JEMALLOC_THP], [ ])
fi
AC_SUBST([enable_thp])
dnl ============================================================================
dnl Check whether __sync_{add,sub}_and_fetch() are available despite
dnl __GCC_HAVE_SYNC_COMPARE_AND_SWAP_n macros being undefined.
@ -1959,6 +2006,29 @@ if test "x${enable_zone_allocator}" = "x1" ; then
AC_DEFINE([JEMALLOC_ZONE], [ ])
fi
dnl ============================================================================
dnl Use initial-exec TLS by default.
AC_ARG_ENABLE([initial-exec-tls],
[AS_HELP_STRING([--disable-initial-exec-tls],
[Disable the initial-exec tls model])],
[if test "x$enable_initial_exec_tls" = "xno" ; then
enable_initial_exec_tls="0"
else
enable_initial_exec_tls="1"
fi
],
[enable_initial_exec_tls="1"]
)
AC_SUBST([enable_initial_exec_tls])
if test "x${je_cv_tls_model}" = "xyes" -a \
"x${enable_initial_exec_tls}" = "x1" ; then
AC_DEFINE([JEMALLOC_TLS_MODEL],
[__attribute__((tls_model("initial-exec")))])
else
AC_DEFINE([JEMALLOC_TLS_MODEL], [ ])
fi
dnl ============================================================================
dnl Enable background threads if possible.
@ -2017,6 +2087,25 @@ if test "x${je_cv_pthread_mutex_adaptive_np}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_PTHREAD_MUTEX_ADAPTIVE_NP], [ ])
fi
JE_CFLAGS_SAVE()
JE_CFLAGS_ADD([-D_GNU_SOURCE])
JE_CFLAGS_ADD([-Werror])
JE_CFLAGS_ADD([-herror_on_warning])
JE_COMPILABLE([strerror_r returns char with gnu source], [
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
], [
char *buffer = (char *) malloc(100);
char *error = strerror_r(EINVAL, buffer, 100);
printf("%s\n", error);
], [je_cv_strerror_r_returns_char_with_gnu_source])
JE_CFLAGS_RESTORE()
if test "x${je_cv_strerror_r_returns_char_with_gnu_source}" = "xyes" ; then
AC_DEFINE([JEMALLOC_STRERROR_R_RETURNS_CHAR_WITH_GNU_SOURCE], [ ])
fi
dnl ============================================================================
dnl Check for typedefs, structures, and compiler characteristics.
AC_HEADER_STDBOOL
@ -2195,10 +2284,10 @@ AC_MSG_RESULT([prof : ${enable_prof}])
AC_MSG_RESULT([prof-libunwind : ${enable_prof_libunwind}])
AC_MSG_RESULT([prof-libgcc : ${enable_prof_libgcc}])
AC_MSG_RESULT([prof-gcc : ${enable_prof_gcc}])
AC_MSG_RESULT([thp : ${enable_thp}])
AC_MSG_RESULT([fill : ${enable_fill}])
AC_MSG_RESULT([utrace : ${enable_utrace}])
AC_MSG_RESULT([xmalloc : ${enable_xmalloc}])
AC_MSG_RESULT([log : ${enable_log}])
AC_MSG_RESULT([lazy_lock : ${enable_lazy_lock}])
AC_MSG_RESULT([cache-oblivious : ${enable_cache_oblivious}])
AC_MSG_RESULT([cxx : ${enable_cxx}])

156
doc/jemalloc.xml.in
View File

@ -761,6 +761,18 @@ mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".decay",
selected pthread-based platforms.</para></listitem>
</varlistentry>
<varlistentry id="max_background_threads">
<term>
<mallctl>max_background_threads</mallctl>
(<type>size_t</type>)
<literal>rw</literal>
</term>
<listitem><para>Maximum number of background worker threads that will
be created. This value is capped at <link
linkend="opt.max_background_threads"><mallctl>opt.max_background_threads</mallctl></link> at
startup.</para></listitem>
</varlistentry>
<varlistentry id="config.cache_oblivious">
<term>
<mallctl>config.cache_oblivious</mallctl>
@ -852,16 +864,6 @@ mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".decay",
build configuration.</para></listitem>
</varlistentry>
<varlistentry id="config.thp">
<term>
<mallctl>config.thp</mallctl>
(<type>bool</type>)
<literal>r-</literal>
</term>
<listitem><para><option>--disable-thp</option> was not specified
during build configuration, and the system supports transparent huge
page manipulation.</para></listitem>
</varlistentry>
<varlistentry id="config.utrace">
<term>
@ -916,6 +918,20 @@ mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".decay",
</para></listitem>
</varlistentry>
<varlistentry id="opt.metadata_thp">
<term>
<mallctl>opt.metadata_thp</mallctl>
(<type>const char *</type>)
<literal>r-</literal>
</term>
<listitem><para>Controls whether to allow jemalloc to use transparent
huge page (THP) for internal metadata (see <link
linkend="stats.metadata">stats.metadata</link>). <quote>always</quote>
allows such usage. <quote>auto</quote> uses no THP initially, but may
begin to do so when metadata usage reaches certain level. The default
is <quote>disabled</quote>.</para></listitem>
</varlistentry>
<varlistentry id="opt.retain">
<term>
<mallctl>opt.retain</mallctl>
@ -996,12 +1012,26 @@ mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".decay",
(<type>const bool</type>)
<literal>r-</literal>
</term>
<listitem><para>Internal background worker threads enabled/disabled. See
<link linkend="background_thread">background_thread</link> for dynamic
control options and details. This option is disabled by
<listitem><para>Internal background worker threads enabled/disabled.
Because of potential circular dependencies, enabling background thread
using this option may cause crash or deadlock during initialization. For
a reliable way to use this feature, see <link
linkend="background_thread">background_thread</link> for dynamic control
options and details. This option is disabled by
default.</para></listitem>
</varlistentry>
<varlistentry id="opt.max_background_threads">
<term>
<mallctl>opt.max_background_threads</mallctl>
(<type>const size_t</type>)
<literal>r-</literal>
</term>
<listitem><para>Maximum number of background threads that will be created
if <link linkend="background_thread">background_thread</link> is set.
Defaults to number of cpus.</para></listitem>
</varlistentry>
<varlistentry id="opt.dirty_decay_ms">
<term>
<mallctl>opt.dirty_decay_ms</mallctl>
@ -1022,7 +1052,7 @@ mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".decay",
The default decay time is 10 seconds. See <link
linkend="arenas.dirty_decay_ms"><mallctl>arenas.dirty_decay_ms</mallctl></link>
and <link
linkend="arena.i.muzzy_decay_ms"><mallctl>arena.&lt;i&gt;.muzzy_decay_ms</mallctl></link>
linkend="arena.i.dirty_decay_ms"><mallctl>arena.&lt;i&gt;.dirty_decay_ms</mallctl></link>
for related dynamic control options. See <link
linkend="opt.muzzy_decay_ms"><mallctl>opt.muzzy_decay_ms</mallctl></link>
for a description of muzzy pages.</para></listitem>
@ -1052,6 +1082,22 @@ mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".decay",
for related dynamic control options.</para></listitem>
</varlistentry>
<varlistentry id="opt.lg_extent_max_active_fit">
<term>
<mallctl>opt.lg_extent_max_active_fit</mallctl>
(<type>size_t</type>)
<literal>r-</literal>
</term>
<listitem><para>When reusing dirty extents, this determines the (log
base 2 of the) maximum ratio between the size of the active extent
selected (to split off from) and the size of the requested allocation.
This prevents the splitting of large active extents for smaller
allocations, which can reduce fragmentation over the long run
(especially for non-active extents). Lower value may reduce
fragmentation, at the cost of extra active extents. The default value
is 6, which gives a maximum ratio of 64 (2^6).</para></listitem>
</varlistentry>
<varlistentry id="opt.stats_print">
<term>
<mallctl>opt.stats_print</mallctl>
@ -1194,6 +1240,28 @@ malloc_conf = "xmalloc:true";]]></programlisting>
default maximum is 32 KiB (2^15).</para></listitem>
</varlistentry>
<varlistentry id="opt.thp">
<term>
<mallctl>opt.thp</mallctl>
(<type>const char *</type>)
<literal>r-</literal>
</term>
<listitem><para>Transparent hugepage (THP) mode. Settings "always",
"never" and "default" are available if THP is supported by the operating
system. The "always" setting enables transparent hugepage for all user
memory mappings with
<parameter><constant>MADV_HUGEPAGE</constant></parameter>; "never"
ensures no transparent hugepage with
<parameter><constant>MADV_NOHUGEPAGE</constant></parameter>; the default
setting "default" makes no changes. Note that: this option does not
affect THP for jemalloc internal metadata (see <link
linkend="opt.metadata_thp"><mallctl>opt.metadata_thp</mallctl></link>);
in addition, for arenas with customized <link
linkend="arena.i.extent_hooks"><mallctl>extent_hooks</mallctl></link>,
this option is bypassed as it is implemented as part of the default
extent hooks.</para></listitem>
</varlistentry>
<varlistentry id="opt.prof">
<term>
<mallctl>opt.prof</mallctl>
@ -1666,6 +1734,22 @@ malloc_conf = "xmalloc:true";]]></programlisting>
for additional information.</para></listitem>
</varlistentry>
<varlistentry id="arena.i.retain_grow_limit">
<term>
<mallctl>arena.&lt;i&gt;.retain_grow_limit</mallctl>
(<type>size_t</type>)
<literal>rw</literal>
</term>
<listitem><para>Maximum size to grow retained region (only relevant when
<link linkend="opt.retain"><mallctl>opt.retain</mallctl></link> is
enabled). This controls the maximum increment to expand virtual memory,
or allocation through <link
linkend="arena.i.extent_hooks"><mallctl>arena.&lt;i&gt;extent_hooks</mallctl></link>.
In particular, if customized extent hooks reserve physical memory
(e.g. 1G huge pages), this is useful to control the allocation hook's
input size. The default is no limit.</para></listitem>
</varlistentry>
<varlistentry id="arena.i.extent_hooks">
<term>
<mallctl>arena.&lt;i&gt;.extent_hooks</mallctl>
@ -1708,7 +1792,9 @@ struct extent_hooks_s {
in favor of less permanent (and often less costly) operations. All
operations except allocation can be universally opted out of by setting
the hook pointers to <constant>NULL</constant>, or selectively opted out
of by returning failure.</para>
of by returning failure. Note that once the extent hook is set, the
structure is accessed directly by the associated arenas, so it must
remain valid for the entire lifetime of the arenas.</para>
<funcsynopsis><funcprototype>
<funcdef>typedef void *<function>(extent_alloc_t)</function></funcdef>
@ -2044,6 +2130,15 @@ struct extent_hooks_s {
and return the new arena index.</para></listitem>
</varlistentry>
<varlistentry id="arenas.lookup">
<term>
<mallctl>arenas.lookup</mallctl>
(<type>unsigned</type>, <type>void*</type>)
<literal>rw</literal>
</term>
<listitem><para>Index of the arena to which an allocation belongs to.</para></listitem>
</varlistentry>
<varlistentry id="prof.thread_active_init">
<term>
<mallctl>prof.thread_active_init</mallctl>
@ -2187,7 +2282,24 @@ struct extent_hooks_s {
metadata structures (see <link
linkend="stats.arenas.i.base"><mallctl>stats.arenas.&lt;i&gt;.base</mallctl></link>)
and internal allocations (see <link
linkend="stats.arenas.i.internal"><mallctl>stats.arenas.&lt;i&gt;.internal</mallctl></link>).</para></listitem>
linkend="stats.arenas.i.internal"><mallctl>stats.arenas.&lt;i&gt;.internal</mallctl></link>).
Transparent huge page (enabled with <link
linkend="opt.metadata_thp">opt.metadata_thp</link>) usage is not
considered.</para></listitem>
</varlistentry>
<varlistentry id="stats.metadata_thp">
<term>
<mallctl>stats.metadata_thp</mallctl>
(<type>size_t</type>)
<literal>r-</literal>
[<option>--enable-stats</option>]
</term>
<listitem><para>Number of transparent huge pages (THP) used for
metadata. See <link
linkend="stats.metadata"><mallctl>stats.metadata</mallctl></link> and
<link linkend="opt.metadata_thp">opt.metadata_thp</link>) for
details.</para></listitem>
</varlistentry>
<varlistentry id="stats.resident">
@ -2506,6 +2618,18 @@ struct extent_hooks_s {
profiles.</para></listitem>
</varlistentry>
<varlistentry id="stats.arenas.i.metadata_thp">
<term>
<mallctl>stats.arenas.&lt;i&gt;.metadata_thp</mallctl>
(<type>size_t</type>)
<literal>r-</literal>
[<option>--enable-stats</option>]
</term>
<listitem><para>Number of transparent huge pages (THP) used for
metadata. See <link linkend="opt.metadata_thp">opt.metadata_thp</link>
for details.</para></listitem>
</varlistentry>
<varlistentry id="stats.arenas.i.resident">
<term>
<mallctl>stats.arenas.&lt;i&gt;.resident</mallctl>

17
include/jemalloc/internal/arena_externs.h
View File

@ -1,6 +1,7 @@
#ifndef JEMALLOC_INTERNAL_ARENA_EXTERNS_H
#define JEMALLOC_INTERNAL_ARENA_EXTERNS_H
#include "jemalloc/internal/bin.h"
#include "jemalloc/internal/extent_dss.h"
#include "jemalloc/internal/pages.h"
#include "jemalloc/internal/size_classes.h"
@ -9,25 +10,19 @@
extern ssize_t opt_dirty_decay_ms;
extern ssize_t opt_muzzy_decay_ms;
extern const arena_bin_info_t arena_bin_info[NBINS];
extern percpu_arena_mode_t opt_percpu_arena;
extern const char *percpu_arena_mode_names[];
extern const uint64_t h_steps[SMOOTHSTEP_NSTEPS];
extern malloc_mutex_t arenas_lock;
void arena_stats_large_nrequests_add(tsdn_t *tsdn, arena_stats_t *arena_stats,
szind_t szind, uint64_t nrequests);
void arena_stats_mapped_add(tsdn_t *tsdn, arena_stats_t *arena_stats,
size_t size);
void arena_basic_stats_merge(tsdn_t *tsdn, arena_t *arena,
unsigned *nthreads, const char **dss, ssize_t *dirty_decay_ms,
ssize_t *muzzy_decay_ms, size_t *nactive, size_t *ndirty, size_t *nmuzzy);
void arena_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads,
const char **dss, ssize_t *dirty_decay_ms, ssize_t *muzzy_decay_ms,
size_t *nactive, size_t *ndirty, size_t *nmuzzy, arena_stats_t *astats,
malloc_bin_stats_t *bstats, malloc_large_stats_t *lstats);
bin_stats_t *bstats, arena_stats_large_t *lstats);
void arena_extents_dirty_dalloc(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, extent_t *extent);
#ifdef JEMALLOC_JET
@ -50,11 +45,11 @@ void arena_decay(tsdn_t *tsdn, arena_t *arena, bool is_background_thread,
void arena_reset(tsd_t *tsd, arena_t *arena);
void arena_destroy(tsd_t *tsd, arena_t *arena);
void arena_tcache_fill_small(tsdn_t *tsdn, arena_t *arena, tcache_t *tcache,
tcache_bin_t *tbin, szind_t binind, uint64_t prof_accumbytes);
void arena_alloc_junk_small(void *ptr, const arena_bin_info_t *bin_info,
cache_bin_t *tbin, szind_t binind, uint64_t prof_accumbytes);
void arena_alloc_junk_small(void *ptr, const bin_info_t *bin_info,
bool zero);
typedef void (arena_dalloc_junk_small_t)(void *, const arena_bin_info_t *);
typedef void (arena_dalloc_junk_small_t)(void *, const bin_info_t *);
extern arena_dalloc_junk_small_t *JET_MUTABLE arena_dalloc_junk_small;
void *arena_malloc_hard(tsdn_t *tsdn, arena_t *arena, size_t size,
@ -77,6 +72,8 @@ ssize_t arena_dirty_decay_ms_default_get(void);
bool arena_dirty_decay_ms_default_set(ssize_t decay_ms);
ssize_t arena_muzzy_decay_ms_default_get(void);
bool arena_muzzy_decay_ms_default_set(ssize_t decay_ms);
bool arena_retain_grow_limit_get_set(tsd_t *tsd, arena_t *arena,
size_t *old_limit, size_t *new_limit);
unsigned arena_nthreads_get(arena_t *arena, bool internal);
void arena_nthreads_inc(arena_t *arena, bool internal);
void arena_nthreads_dec(arena_t *arena, bool internal);

2
include/jemalloc/internal/arena_inlines_a.h
View File

@ -25,7 +25,7 @@ static inline bool
arena_prof_accum(tsdn_t *tsdn, arena_t *arena, uint64_t accumbytes) {
cassert(config_prof);
if (likely(prof_interval == 0)) {
if (likely(prof_interval == 0 || !prof_active_get_unlocked())) {
return false;
}

11
include/jemalloc/internal/arena_inlines_b.h
View File

@ -8,13 +8,6 @@
#include "jemalloc/internal/sz.h"
#include "jemalloc/internal/ticker.h"
static inline szind_t
arena_bin_index(arena_t *arena, arena_bin_t *bin) {
szind_t binind = (szind_t)(bin - arena->bins);
assert(binind < NBINS);
return binind;
}
JEMALLOC_ALWAYS_INLINE prof_tctx_t *
arena_prof_tctx_get(tsdn_t *tsdn, const void *ptr, alloc_ctx_t *alloc_ctx) {
cassert(config_prof);
@ -35,7 +28,7 @@ arena_prof_tctx_get(tsdn_t *tsdn, const void *ptr, alloc_ctx_t *alloc_ctx) {
}
JEMALLOC_ALWAYS_INLINE void
arena_prof_tctx_set(tsdn_t *tsdn, const void *ptr, size_t usize,
arena_prof_tctx_set(tsdn_t *tsdn, const void *ptr, UNUSED size_t usize,
alloc_ctx_t *alloc_ctx, prof_tctx_t *tctx) {
cassert(config_prof);
assert(ptr != NULL);
@ -54,7 +47,7 @@ arena_prof_tctx_set(tsdn_t *tsdn, const void *ptr, size_t usize,
}
static inline void
arena_prof_tctx_reset(tsdn_t *tsdn, const void *ptr, prof_tctx_t *tctx) {
arena_prof_tctx_reset(tsdn_t *tsdn, const void *ptr, UNUSED prof_tctx_t *tctx) {
cassert(config_prof);
assert(ptr != NULL);

237
include/jemalloc/internal/arena_stats.h Normal file
View File

@ -0,0 +1,237 @@
#ifndef JEMALLOC_INTERNAL_ARENA_STATS_H
#define JEMALLOC_INTERNAL_ARENA_STATS_H
#include "jemalloc/internal/atomic.h"
#include "jemalloc/internal/mutex.h"
#include "jemalloc/internal/mutex_prof.h"
#include "jemalloc/internal/size_classes.h"
/*
* In those architectures that support 64-bit atomics, we use atomic updates for
* our 64-bit values. Otherwise, we use a plain uint64_t and synchronize
* externally.
*/
#ifdef JEMALLOC_ATOMIC_U64
typedef atomic_u64_t arena_stats_u64_t;
#else
/* Must hold the arena stats mutex while reading atomically. */
typedef uint64_t arena_stats_u64_t;
#endif
typedef struct arena_stats_large_s arena_stats_large_t;
struct arena_stats_large_s {
/*
* Total number of allocation/deallocation requests served directly by
* the arena.
*/
arena_stats_u64_t nmalloc;
arena_stats_u64_t ndalloc;
/*
* Number of allocation requests that correspond to this size class.
* This includes requests served by tcache, though tcache only
* periodically merges into this counter.
*/
arena_stats_u64_t nrequests; /* Partially derived. */
/* Current number of allocations of this size class. */
size_t curlextents; /* Derived. */
};
typedef struct arena_stats_decay_s arena_stats_decay_t;
struct arena_stats_decay_s {
/* Total number of purge sweeps. */
arena_stats_u64_t npurge;
/* Total number of madvise calls made. */
arena_stats_u64_t nmadvise;
/* Total number of pages purged. */
arena_stats_u64_t purged;
};
/*
* Arena stats. Note that fields marked "derived" are not directly maintained
* within the arena code; rather their values are derived during stats merge
* requests.
*/
typedef struct arena_stats_s arena_stats_t;
struct arena_stats_s {
#ifndef JEMALLOC_ATOMIC_U64
malloc_mutex_t mtx;
#endif
/* Number of bytes currently mapped, excluding retained memory. */
atomic_zu_t mapped; /* Partially derived. */
/*
* Number of unused virtual memory bytes currently retained. Retained
* bytes are technically mapped (though always decommitted or purged),
* but they are excluded from the mapped statistic (above).
*/
atomic_zu_t retained; /* Derived. */
arena_stats_decay_t decay_dirty;
arena_stats_decay_t decay_muzzy;
atomic_zu_t base; /* Derived. */
atomic_zu_t internal;
atomic_zu_t resident; /* Derived. */
atomic_zu_t metadata_thp;
atomic_zu_t allocated_large; /* Derived. */
arena_stats_u64_t nmalloc_large; /* Derived. */
arena_stats_u64_t ndalloc_large; /* Derived. */
arena_stats_u64_t nrequests_large; /* Derived. */
/* Number of bytes cached in tcache associated with this arena. */
atomic_zu_t tcache_bytes; /* Derived. */
mutex_prof_data_t mutex_prof_data[mutex_prof_num_arena_mutexes];
/* One element for each large size class. */
arena_stats_large_t lstats[NSIZES - NBINS];
/* Arena uptime. */
nstime_t uptime;
};
static inline bool
arena_stats_init(UNUSED tsdn_t *tsdn, arena_stats_t *arena_stats) {
if (config_debug) {
for (size_t i = 0; i < sizeof(arena_stats_t); i++) {
assert(((char *)arena_stats)[i] == 0);
}
}
#ifndef JEMALLOC_ATOMIC_U64
if (malloc_mutex_init(&arena_stats->mtx, "arena_stats",
WITNESS_RANK_ARENA_STATS, malloc_mutex_rank_exclusive)) {
return true;
}
#endif
/* Memory is zeroed, so there is no need to clear stats. */
return false;
}
static inline void
arena_stats_lock(tsdn_t *tsdn, arena_stats_t *arena_stats) {
#ifndef JEMALLOC_ATOMIC_U64
malloc_mutex_lock(tsdn, &arena_stats->mtx);
#endif
}
static inline void
arena_stats_unlock(tsdn_t *tsdn, arena_stats_t *arena_stats) {
#ifndef JEMALLOC_ATOMIC_U64
malloc_mutex_unlock(tsdn, &arena_stats->mtx);
#endif
}
static inline uint64_t
arena_stats_read_u64(tsdn_t *tsdn, arena_stats_t *arena_stats,
arena_stats_u64_t *p) {
#ifdef JEMALLOC_ATOMIC_U64
return atomic_load_u64(p, ATOMIC_RELAXED);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
return *p;
#endif
}
static inline void
arena_stats_add_u64(tsdn_t *tsdn, arena_stats_t *arena_stats,
arena_stats_u64_t *p, uint64_t x) {
#ifdef JEMALLOC_ATOMIC_U64
atomic_fetch_add_u64(p, x, ATOMIC_RELAXED);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
*p += x;
#endif
}
UNUSED static inline void
arena_stats_sub_u64(tsdn_t *tsdn, arena_stats_t *arena_stats,
arena_stats_u64_t *p, uint64_t x) {
#ifdef JEMALLOC_ATOMIC_U64
UNUSED uint64_t r = atomic_fetch_sub_u64(p, x, ATOMIC_RELAXED);
assert(r - x <= r);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
*p -= x;
assert(*p + x >= *p);
#endif
}
/*
* Non-atomically sets *dst += src. *dst needs external synchronization.
* This lets us avoid the cost of a fetch_add when its unnecessary (note that
* the types here are atomic).
*/
static inline void
arena_stats_accum_u64(arena_stats_u64_t *dst, uint64_t src) {
#ifdef JEMALLOC_ATOMIC_U64
uint64_t cur_dst = atomic_load_u64(dst, ATOMIC_RELAXED);
atomic_store_u64(dst, src + cur_dst, ATOMIC_RELAXED);
#else
*dst += src;
#endif
}
static inline size_t
arena_stats_read_zu(tsdn_t *tsdn, arena_stats_t *arena_stats, atomic_zu_t *p) {
#ifdef JEMALLOC_ATOMIC_U64
return atomic_load_zu(p, ATOMIC_RELAXED);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
return atomic_load_zu(p, ATOMIC_RELAXED);
#endif
}
static inline void
arena_stats_add_zu(tsdn_t *tsdn, arena_stats_t *arena_stats, atomic_zu_t *p,
size_t x) {
#ifdef JEMALLOC_ATOMIC_U64
atomic_fetch_add_zu(p, x, ATOMIC_RELAXED);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
size_t cur = atomic_load_zu(p, ATOMIC_RELAXED);
atomic_store_zu(p, cur + x, ATOMIC_RELAXED);
#endif
}
static inline void
arena_stats_sub_zu(tsdn_t *tsdn, arena_stats_t *arena_stats, atomic_zu_t *p,
size_t x) {
#ifdef JEMALLOC_ATOMIC_U64
UNUSED size_t r = atomic_fetch_sub_zu(p, x, ATOMIC_RELAXED);
assert(r - x <= r);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
size_t cur = atomic_load_zu(p, ATOMIC_RELAXED);
atomic_store_zu(p, cur - x, ATOMIC_RELAXED);
#endif
}
/* Like the _u64 variant, needs an externally synchronized *dst. */
static inline void
arena_stats_accum_zu(atomic_zu_t *dst, size_t src) {
size_t cur_dst = atomic_load_zu(dst, ATOMIC_RELAXED);
atomic_store_zu(dst, src + cur_dst, ATOMIC_RELAXED);
}
static inline void
arena_stats_large_nrequests_add(tsdn_t *tsdn, arena_stats_t *arena_stats,
szind_t szind, uint64_t nrequests) {
arena_stats_lock(tsdn, arena_stats);
arena_stats_add_u64(tsdn, arena_stats, &arena_stats->lstats[szind -
NBINS].nrequests, nrequests);
arena_stats_unlock(tsdn, arena_stats);
}
static inline void
arena_stats_mapped_add(tsdn_t *tsdn, arena_stats_t *arena_stats, size_t size) {
arena_stats_lock(tsdn, arena_stats);
arena_stats_add_zu(tsdn, arena_stats, &arena_stats->mapped, size);
arena_stats_unlock(tsdn, arena_stats);
}
#endif /* JEMALLOC_INTERNAL_ARENA_STATS_H */

81
include/jemalloc/internal/arena_structs_b.h
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@ -1,7 +1,9 @@
#ifndef JEMALLOC_INTERNAL_ARENA_STRUCTS_B_H
#define JEMALLOC_INTERNAL_ARENA_STRUCTS_B_H
#include "jemalloc/internal/arena_stats.h"
#include "jemalloc/internal/atomic.h"
#include "jemalloc/internal/bin.h"
#include "jemalloc/internal/bitmap.h"
#include "jemalloc/internal/extent_dss.h"
#include "jemalloc/internal/jemalloc_internal_types.h"
@ -10,45 +12,8 @@
#include "jemalloc/internal/ql.h"
#include "jemalloc/internal/size_classes.h"
#include "jemalloc/internal/smoothstep.h"
#include "jemalloc/internal/stats.h"
#include "jemalloc/internal/ticker.h"
/*
* Read-only information associated with each element of arena_t's bins array
* is stored separately, partly to reduce memory usage (only one copy, rather
* than one per arena), but mainly to avoid false cacheline sharing.
*
* Each slab has the following layout:
*
* /--------------------\
* | region 0 |
* |--------------------|
* | region 1 |
* |--------------------|
* | ... |
* | ... |
* | ... |
* |--------------------|
* | region nregs-1 |
* \--------------------/
*/
struct arena_bin_info_s {
/* Size of regions in a slab for this bin's size class. */
size_t reg_size;
/* Total size of a slab for this bin's size class. */
size_t slab_size;
/* Total number of regions in a slab for this bin's size class. */
uint32_t nregs;
/*
* Metadata used to manipulate bitmaps for slabs associated with this
* bin.
*/
bitmap_info_t bitmap_info;
};
struct arena_decay_s {
/* Synchronizes all non-atomic fields. */
malloc_mutex_t mtx;
@ -104,37 +69,11 @@ struct arena_decay_s {
* arena and ctl code.
*
* Synchronization: Same as associated arena's stats field. */
decay_stats_t *stats;
arena_stats_decay_t *stats;
/* Peak number of pages in associated extents. Used for debug only. */
uint64_t ceil_npages;
};
struct arena_bin_s {
/* All operations on arena_bin_t fields require lock ownership. */
malloc_mutex_t lock;
/*
* Current slab being used to service allocations of this bin's size
* class. slabcur is independent of slabs_{nonfull,full}; whenever
* slabcur is reassigned, the previous slab must be deallocated or
* inserted into slabs_{nonfull,full}.
*/
extent_t *slabcur;
/*
* Heap of non-full slabs. This heap is used to assure that new
* allocations come from the non-full slab that is oldest/lowest in
* memory.
*/
extent_heap_t slabs_nonfull;
/* List used to track full slabs. */
extent_list_t slabs_full;
/* Bin statistics. */
malloc_bin_stats_t stats;
};
struct arena_s {
/*
* Number of threads currently assigned to this arena. Each thread has
@ -162,13 +101,14 @@ struct arena_s {
arena_stats_t stats;
/*
* List of tcaches for extant threads associated with this arena.
* Stats from these are merged incrementally, and at exit if
* opt_stats_print is enabled.
* Lists of tcaches and cache_bin_array_descriptors for extant threads
* associated with this arena. Stats from these are merged
* incrementally, and at exit if opt_stats_print is enabled.
*
* Synchronization: tcache_ql_mtx.
*/
ql_head(tcache_t) tcache_ql;
ql_head(cache_bin_array_descriptor_t) cache_bin_array_descriptor_ql;
malloc_mutex_t tcache_ql_mtx;
/* Synchronization: internal. */
@ -239,9 +179,14 @@ struct arena_s {
* be effective even if multiple arenas' extent allocation requests are
* highly interleaved.
*
* retain_grow_limit is the max allowed size ind to expand (unless the
* required size is greater). Default is no limit, and controlled
* through mallctl only.
*
* Synchronization: extent_grow_mtx
*/
pszind_t extent_grow_next;
pszind_t retain_grow_limit;
malloc_mutex_t extent_grow_mtx;
/*
@ -258,7 +203,7 @@ struct arena_s {
*
* Synchronization: internal.
*/
arena_bin_t bins[NBINS];
bin_t bins[NBINS];
/*
* Base allocator, from which arena metadata are allocated.

2
include/jemalloc/internal/arena_types.h
View File

@ -12,9 +12,7 @@
#define DECAY_NTICKS_PER_UPDATE 1000
typedef struct arena_slab_data_s arena_slab_data_t;
typedef struct arena_bin_info_s arena_bin_info_t;
typedef struct arena_decay_s arena_decay_t;
typedef struct arena_bin_s arena_bin_t;
typedef struct arena_s arena_t;
typedef struct arena_tdata_s arena_tdata_t;
typedef struct alloc_ctx_s alloc_ctx_t;

2
include/jemalloc/internal/background_thread_externs.h
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@ -2,9 +2,11 @@
#define JEMALLOC_INTERNAL_BACKGROUND_THREAD_EXTERNS_H
extern bool opt_background_thread;
extern size_t opt_max_background_threads;
extern malloc_mutex_t background_thread_lock;
extern atomic_b_t background_thread_enabled_state;
extern size_t n_background_threads;
extern size_t max_background_threads;
extern background_thread_info_t *background_thread_info;
extern bool can_enable_background_thread;

1
include/jemalloc/internal/background_thread_structs.h
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@ -8,6 +8,7 @@
#endif
#define BACKGROUND_THREAD_INDEFINITE_SLEEP UINT64_MAX
#define MAX_BACKGROUND_THREAD_LIMIT MALLOCX_ARENA_LIMIT
typedef enum {
background_thread_stopped,

5
include/jemalloc/internal/base_externs.h
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@ -1,6 +1,9 @@
#ifndef JEMALLOC_INTERNAL_BASE_EXTERNS_H
#define JEMALLOC_INTERNAL_BASE_EXTERNS_H
extern metadata_thp_mode_t opt_metadata_thp;
extern const char *metadata_thp_mode_names[];
base_t *b0get(void);
base_t *base_new(tsdn_t *tsdn, unsigned ind, extent_hooks_t *extent_hooks);
void base_delete(tsdn_t *tsdn, base_t *base);
@ -10,7 +13,7 @@ extent_hooks_t *base_extent_hooks_set(base_t *base,
void *base_alloc(tsdn_t *tsdn, base_t *base, size_t size, size_t alignment);
extent_t *base_alloc_extent(tsdn_t *tsdn, base_t *base);
void base_stats_get(tsdn_t *tsdn, base_t *base, size_t *allocated,
size_t *resident, size_t *mapped);
size_t *resident, size_t *mapped, size_t *n_thp);
void base_prefork(tsdn_t *tsdn, base_t *base);
void base_postfork_parent(tsdn_t *tsdn, base_t *base);
void base_postfork_child(tsdn_t *tsdn, base_t *base);

4
include/jemalloc/internal/base_inlines.h
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@ -6,4 +6,8 @@ base_ind_get(const base_t *base) {
return base->ind;
}
static inline bool
metadata_thp_enabled(void) {
return (opt_metadata_thp != metadata_thp_disabled);
}
#endif /* JEMALLOC_INTERNAL_BASE_INLINES_H */

4
include/jemalloc/internal/base_structs.h
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@ -30,6 +30,8 @@ struct base_s {
/* Protects base_alloc() and base_stats_get() operations. */
malloc_mutex_t mtx;
/* Using THP when true (metadata_thp auto mode). */
bool auto_thp_switched;
/*
* Most recent size class in the series of increasingly large base
* extents. Logarithmic spacing between subsequent allocations ensures
@ -50,6 +52,8 @@ struct base_s {
size_t allocated;
size_t resident;
size_t mapped;
/* Number of THP regions touched. */
size_t n_thp;
};
#endif /* JEMALLOC_INTERNAL_BASE_STRUCTS_H */

26
include/jemalloc/internal/base_types.h
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@ -4,4 +4,30 @@
typedef struct base_block_s base_block_t;
typedef struct base_s base_t;
#define METADATA_THP_DEFAULT metadata_thp_disabled
/*
* In auto mode, arenas switch to huge pages for the base allocator on the
* second base block. a0 switches to thp on the 5th block (after 20 megabytes
* of metadata), since more metadata (e.g. rtree nodes) come from a0's base.
*/
#define BASE_AUTO_THP_THRESHOLD 2
#define BASE_AUTO_THP_THRESHOLD_A0 5
typedef enum {
metadata_thp_disabled = 0,
/*
* Lazily enable hugepage for metadata. To avoid high RSS caused by THP
* + low usage arena (i.e. THP becomes a significant percentage), the
* "auto" option only starts using THP after a base allocator used up
* the first THP region. Starting from the second hugepage (in a single
* arena), "auto" behaves the same as "always", i.e. madvise hugepage
* right away.
*/
metadata_thp_auto = 1,
metadata_thp_always = 2,
metadata_thp_mode_limit = 3
} metadata_thp_mode_t;
#endif /* JEMALLOC_INTERNAL_BASE_TYPES_H */

106
include/jemalloc/internal/bin.h Normal file
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@ -0,0 +1,106 @@
#ifndef JEMALLOC_INTERNAL_BIN_H
#define JEMALLOC_INTERNAL_BIN_H
#include "jemalloc/internal/extent_types.h"
#include "jemalloc/internal/extent_structs.h"
#include "jemalloc/internal/mutex.h"
#include "jemalloc/internal/bin_stats.h"
/*
* A bin contains a set of extents that are currently being used for slab
* allocations.
*/
/*
* Read-only information associated with each element of arena_t's bins array
* is stored separately, partly to reduce memory usage (only one copy, rather
* than one per arena), but mainly to avoid false cacheline sharing.
*
* Each slab has the following layout:
*
* /--------------------\
* | region 0 |
* |--------------------|
* | region 1 |
* |--------------------|
* | ... |
* | ... |
* | ... |
* |--------------------|
* | region nregs-1 |
* \--------------------/
*/
typedef struct bin_info_s bin_info_t;
struct bin_info_s {
/* Size of regions in a slab for this bin's size class. */
size_t reg_size;
/* Total size of a slab for this bin's size class. */
size_t slab_size;
/* Total number of regions in a slab for this bin's size class. */
uint32_t nregs;
/*
* Metadata used to manipulate bitmaps for slabs associated with this
* bin.
*/
bitmap_info_t bitmap_info;
};
extern const bin_info_t bin_infos[NBINS];
typedef struct bin_s bin_t;
struct bin_s {
/* All operations on bin_t fields require lock ownership. */
malloc_mutex_t lock;
/*
* Current slab being used to service allocations of this bin's size
* class. slabcur is independent of slabs_{nonfull,full}; whenever
* slabcur is reassigned, the previous slab must be deallocated or
* inserted into slabs_{nonfull,full}.
*/
extent_t *slabcur;
/*
* Heap of non-full slabs. This heap is used to assure that new
* allocations come from the non-full slab that is oldest/lowest in
* memory.
*/
extent_heap_t slabs_nonfull;
/* List used to track full slabs. */
extent_list_t slabs_full;
/* Bin statistics. */
bin_stats_t stats;
};
/* Initializes a bin to empty. Returns true on error. */
bool bin_init(bin_t *bin);
/* Forking. */
void bin_prefork(tsdn_t *tsdn, bin_t *bin);
void bin_postfork_parent(tsdn_t *tsdn, bin_t *bin);
void bin_postfork_child(tsdn_t *tsdn, bin_t *bin);
/* Stats. */
static inline void
bin_stats_merge(tsdn_t *tsdn, bin_stats_t *dst_bin_stats, bin_t *bin) {
malloc_mutex_lock(tsdn, &bin->lock);
malloc_mutex_prof_read(tsdn, &dst_bin_stats->mutex_data, &bin->lock);
dst_bin_stats->nmalloc += bin->stats.nmalloc;
dst_bin_stats->ndalloc += bin->stats.ndalloc;
dst_bin_stats->nrequests += bin->stats.nrequests;
dst_bin_stats->curregs += bin->stats.curregs;
dst_bin_stats->nfills += bin->stats.nfills;
dst_bin_stats->nflushes += bin->stats.nflushes;
dst_bin_stats->nslabs += bin->stats.nslabs;
dst_bin_stats->reslabs += bin->stats.reslabs;
dst_bin_stats->curslabs += bin->stats.curslabs;
malloc_mutex_unlock(tsdn, &bin->lock);
}
#endif /* JEMALLOC_INTERNAL_BIN_H */

51
include/jemalloc/internal/bin_stats.h Normal file
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@ -0,0 +1,51 @@
#ifndef JEMALLOC_INTERNAL_BIN_STATS_H
#define JEMALLOC_INTERNAL_BIN_STATS_H
#include "jemalloc/internal/mutex_prof.h"
typedef struct bin_stats_s bin_stats_t;
struct bin_stats_s {
/*
* Total number of allocation/deallocation requests served directly by
* the bin. Note that tcache may allocate an object, then recycle it
* many times, resulting many increments to nrequests, but only one
* each to nmalloc and ndalloc.
*/
uint64_t nmalloc;
uint64_t ndalloc;
/*
* Number of allocation requests that correspond to the size of this
* bin. This includes requests served by tcache, though tcache only
* periodically merges into this counter.
*/
uint64_t nrequests;
/*
* Current number of regions of this size class, including regions
* currently cached by tcache.
*/
size_t curregs;
/* Number of tcache fills from this bin. */
uint64_t nfills;
/* Number of tcache flushes to this bin. */
uint64_t nflushes;
/* Total number of slabs created for this bin's size class. */
uint64_t nslabs;
/*
* Total number of slabs reused by extracting them from the slabs heap
* for this bin's size class.
*/
uint64_t reslabs;
/* Current number of slabs in this bin. */
size_t curslabs;
mutex_prof_data_t mutex_data;
};
#endif /* JEMALLOC_INTERNAL_BIN_STATS_H */

114
include/jemalloc/internal/cache_bin.h Normal file
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@ -0,0 +1,114 @@
#ifndef JEMALLOC_INTERNAL_CACHE_BIN_H
#define JEMALLOC_INTERNAL_CACHE_BIN_H
#include "jemalloc/internal/ql.h"
/*
* The cache_bins are the mechanism that the tcache and the arena use to
* communicate. The tcache fills from and flushes to the arena by passing a
* cache_bin_t to fill/flush. When the arena needs to pull stats from the
* tcaches associated with it, it does so by iterating over its
* cache_bin_array_descriptor_t objects and reading out per-bin stats it
* contains. This makes it so that the arena need not know about the existence
* of the tcache at all.
*/
/*
* The count of the number of cached allocations in a bin. We make this signed
* so that negative numbers can encode "invalid" states (e.g. a low water mark
* of -1 for a cache that has been depleted).
*/
typedef int32_t cache_bin_sz_t;
typedef struct cache_bin_stats_s cache_bin_stats_t;
struct cache_bin_stats_s {
/*
* Number of allocation requests that corresponded to the size of this
* bin.
*/
uint64_t nrequests;
};
/*
* Read-only information associated with each element of tcache_t's tbins array
* is stored separately, mainly to reduce memory usage.
*/
typedef struct cache_bin_info_s cache_bin_info_t;
struct cache_bin_info_s {
/* Upper limit on ncached. */
cache_bin_sz_t ncached_max;
};
typedef struct cache_bin_s cache_bin_t;
struct cache_bin_s {
/* Min # cached since last GC. */
cache_bin_sz_t low_water;
/* # of cached objects. */
cache_bin_sz_t ncached;
/*
* ncached and stats are both modified frequently. Let's keep them
* close so that they have a higher chance of being on the same
* cacheline, thus less write-backs.
*/
cache_bin_stats_t tstats;
/*
* Stack of available objects.
*
* To make use of adjacent cacheline prefetch, the items in the avail
* stack goes to higher address for newer allocations. avail points
* just above the available space, which means that
* avail[-ncached, ... -1] are available items and the lowest item will
* be allocated first.
*/
void **avail;
};
typedef struct cache_bin_array_descriptor_s cache_bin_array_descriptor_t;
struct cache_bin_array_descriptor_s {
/*
* The arena keeps a list of the cache bins associated with it, for
* stats collection.
*/
ql_elm(cache_bin_array_descriptor_t) link;
/* Pointers to the tcache bins. */
cache_bin_t *bins_small;
cache_bin_t *bins_large;
};
static inline void
cache_bin_array_descriptor_init(cache_bin_array_descriptor_t *descriptor,
cache_bin_t *bins_small, cache_bin_t *bins_large) {
ql_elm_new(descriptor, link);
descriptor->bins_small = bins_small;
descriptor->bins_large = bins_large;
}
JEMALLOC_ALWAYS_INLINE void *
cache_bin_alloc_easy(cache_bin_t *bin, bool *success) {
void *ret;
if (unlikely(bin->ncached == 0)) {
bin->low_water = -1;
*success = false;
return NULL;
}
/*
* success (instead of ret) should be checked upon the return of this
* function. We avoid checking (ret == NULL) because there is never a
* null stored on the avail stack (which is unknown to the compiler),
* and eagerly checking ret would cause pipeline stall (waiting for the
* cacheline).
*/
*success = true;
ret = *(bin->avail - bin->ncached);
bin->ncached--;
if (unlikely(bin->ncached < bin->low_water)) {
bin->low_water = bin->ncached;
}
return ret;
}
#endif /* JEMALLOC_INTERNAL_CACHE_BIN_H */

5
include/jemalloc/internal/ctl.h
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@ -40,14 +40,15 @@ typedef struct ctl_arena_stats_s {
uint64_t ndalloc_small;
uint64_t nrequests_small;
malloc_bin_stats_t bstats[NBINS];
malloc_large_stats_t lstats[NSIZES - NBINS];
bin_stats_t bstats[NBINS];
arena_stats_large_t lstats[NSIZES - NBINS];
} ctl_arena_stats_t;
typedef struct ctl_stats_s {
size_t allocated;
size_t active;
size_t metadata;
size_t metadata_thp;
size_t resident;
size_t mapped;
size_t retained;

41
include/jemalloc/internal/div.h Normal file
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@ -0,0 +1,41 @@
#ifndef JEMALLOC_INTERNAL_DIV_H
#define JEMALLOC_INTERNAL_DIV_H
#include "jemalloc/internal/assert.h"
/*
* This module does the division that computes the index of a region in a slab,
* given its offset relative to the base.
* That is, given a divisor d, an n = i * d (all integers), we'll return i.
* We do some pre-computation to do this more quickly than a CPU division
* instruction.
* We bound n < 2^32, and don't support dividing by one.
*/
typedef struct div_info_s div_info_t;
struct div_info_s {
uint32_t magic;
#ifdef JEMALLOC_DEBUG
size_t d;
#endif
};
void div_init(div_info_t *div_info, size_t divisor);
static inline size_t
div_compute(div_info_t *div_info, size_t n) {
assert(n <= (uint32_t)-1);
/*
* This generates, e.g. mov; imul; shr on x86-64. On a 32-bit machine,
* the compilers I tried were all smart enough to turn this into the
* appropriate "get the high 32 bits of the result of a multiply" (e.g.
* mul; mov edx eax; on x86, umull on arm, etc.).
*/
size_t i = ((uint64_t)n * (uint64_t)div_info->magic) >> 32;
#ifdef JEMALLOC_DEBUG
assert(i * div_info->d == n);
#endif
return i;
}
#endif /* JEMALLOC_INTERNAL_DIV_H */

435
include/jemalloc/internal/emitter.h Normal file
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@ -0,0 +1,435 @@
#ifndef JEMALLOC_INTERNAL_EMITTER_H
#define JEMALLOC_INTERNAL_EMITTER_H
#include "jemalloc/internal/ql.h"
typedef enum emitter_output_e emitter_output_t;
enum emitter_output_e {
emitter_output_json,
emitter_output_table
};
typedef enum emitter_justify_e emitter_justify_t;
enum emitter_justify_e {
emitter_justify_left,
emitter_justify_right,
/* Not for users; just to pass to internal functions. */
emitter_justify_none
};
typedef enum emitter_type_e emitter_type_t;
enum emitter_type_e {
emitter_type_bool,
emitter_type_int,
emitter_type_unsigned,
emitter_type_uint32,
emitter_type_uint64,
emitter_type_size,
emitter_type_ssize,
emitter_type_string,
/*
* A title is a column title in a table; it's just a string, but it's
* not quoted.
*/
emitter_type_title,
};
typedef struct emitter_col_s emitter_col_t;
struct emitter_col_s {
/* Filled in by the user. */
emitter_justify_t justify;
int width;
emitter_type_t type;
union {
bool bool_val;
int int_val;
unsigned unsigned_val;
uint32_t uint32_val;
uint64_t uint64_val;
size_t size_val;
ssize_t ssize_val;
const char *str_val;
};
/* Filled in by initialization. */
ql_elm(emitter_col_t) link;
};
typedef struct emitter_row_s emitter_row_t;
struct emitter_row_s {
ql_head(emitter_col_t) cols;
};
static inline void
emitter_row_init(emitter_row_t *row) {
ql_new(&row->cols);
}
static inline void
emitter_col_init(emitter_col_t *col, emitter_row_t *row) {
ql_elm_new(col, link);
ql_tail_insert(&row->cols, col, link);
}
typedef struct emitter_s emitter_t;
struct emitter_s {
emitter_output_t output;
/* The output information. */
void (*write_cb)(void *, const char *);
void *cbopaque;
int nesting_depth;
/* True if we've already emitted a value at the given depth. */
bool item_at_depth;
};
static inline void
emitter_init(emitter_t *emitter, emitter_output_t emitter_output,
void (*write_cb)(void *, const char *), void *cbopaque) {
emitter->output = emitter_output;
emitter->write_cb = write_cb;
emitter->cbopaque = cbopaque;
emitter->item_at_depth = false;
emitter->nesting_depth = 0;
}
/* Internal convenience function. Write to the emitter the given string. */
JEMALLOC_FORMAT_PRINTF(2, 3)
static inline void
emitter_printf(emitter_t *emitter, const char *format, ...) {
va_list ap;
va_start(ap, format);
malloc_vcprintf(emitter->write_cb, emitter->cbopaque, format, ap);
va_end(ap);
}
/* Write to the emitter the given string, but only in table mode. */
JEMALLOC_FORMAT_PRINTF(2, 3)
static inline void
emitter_table_printf(emitter_t *emitter, const char *format, ...) {
if (emitter->output == emitter_output_table) {
va_list ap;
va_start(ap, format);
malloc_vcprintf(emitter->write_cb, emitter->cbopaque, format, ap);
va_end(ap);
}
}
static inline void
emitter_gen_fmt(char *out_fmt, size_t out_size, const char *fmt_specifier,
emitter_justify_t justify, int width) {
size_t written;
if (justify == emitter_justify_none) {
written = malloc_snprintf(out_fmt, out_size,
"%%%s", fmt_specifier);
} else if (justify == emitter_justify_left) {
written = malloc_snprintf(out_fmt, out_size,
"%%-%d%s", width, fmt_specifier);
} else {
written = malloc_snprintf(out_fmt, out_size,
"%%%d%s", width, fmt_specifier);
}
/* Only happens in case of bad format string, which *we* choose. */
assert(written < out_size);
}
/*
* Internal. Emit the given value type in the relevant encoding (so that the
* bool true gets mapped to json "true", but the string "true" gets mapped to
* json "\"true\"", for instance.
*
* Width is ignored if justify is emitter_justify_none.
*/
static inline void
emitter_print_value(emitter_t *emitter, emitter_justify_t justify, int width,
emitter_type_t value_type, const void *value) {
size_t str_written;
#define BUF_SIZE 256
#define FMT_SIZE 10
/*
* We dynamically generate a format string to emit, to let us use the
* snprintf machinery. This is kinda hacky, but gets the job done
* quickly without having to think about the various snprintf edge
* cases.
*/
char fmt[FMT_SIZE];
char buf[BUF_SIZE];
#define EMIT_SIMPLE(type, format) \
emitter_gen_fmt(fmt, FMT_SIZE, format, justify, width); \
emitter_printf(emitter, fmt, *(const type *)value); \
switch (value_type) {
case emitter_type_bool:
emitter_gen_fmt(fmt, FMT_SIZE, "s", justify, width);
emitter_printf(emitter, fmt, *(const bool *)value ?
"true" : "false");
break;
case emitter_type_int:
EMIT_SIMPLE(int, "d")
break;
case emitter_type_unsigned:
EMIT_SIMPLE(unsigned, "u")
break;
case emitter_type_ssize:
EMIT_SIMPLE(ssize_t, "zd")
break;
case emitter_type_size:
EMIT_SIMPLE(size_t, "zu")
break;
case emitter_type_string:
str_written = malloc_snprintf(buf, BUF_SIZE, "\"%s\"",
*(const char *const *)value);
/*
* We control the strings we output; we shouldn't get anything
* anywhere near the fmt size.
*/
assert(str_written < BUF_SIZE);
emitter_gen_fmt(fmt, FMT_SIZE, "s", justify, width);
emitter_printf(emitter, fmt, buf);
break;
case emitter_type_uint32:
EMIT_SIMPLE(uint32_t, FMTu32)
break;
case emitter_type_uint64:
EMIT_SIMPLE(uint64_t, FMTu64)
break;
case emitter_type_title:
EMIT_SIMPLE(char *const, "s");
break;
default:
unreachable();
}
#undef BUF_SIZE
#undef FMT_SIZE
}
/* Internal functions. In json mode, tracks nesting state. */
static inline void
emitter_nest_inc(emitter_t *emitter) {
emitter->nesting_depth++;
emitter->item_at_depth = false;
}
static inline void
emitter_nest_dec(emitter_t *emitter) {
emitter->nesting_depth--;
emitter->item_at_depth = true;
}
static inline void
emitter_indent(emitter_t *emitter) {
int amount = emitter->nesting_depth;
const char *indent_str;
if (emitter->output == emitter_output_json) {
indent_str = "\t";
} else {
amount *= 2;
indent_str = " ";
}
for (int i = 0; i < amount; i++) {
emitter_printf(emitter, "%s", indent_str);
}
}
static inline void
emitter_json_key_prefix(emitter_t *emitter) {
emitter_printf(emitter, "%s\n", emitter->item_at_depth ? "," : "");
emitter_indent(emitter);
}
static inline void
emitter_begin(emitter_t *emitter) {
if (emitter->output == emitter_output_json) {
assert(emitter->nesting_depth == 0);
emitter_printf(emitter, "{");
emitter_nest_inc(emitter);
} else {
// tabular init
emitter_printf(emitter, "%s", "");
}
}
static inline void
emitter_end(emitter_t *emitter) {
if (emitter->output == emitter_output_json) {
assert(emitter->nesting_depth == 1);
emitter_nest_dec(emitter);
emitter_printf(emitter, "\n}\n");
}
}
/*
* Note emits a different kv pair as well, but only in table mode. Omits the
* note if table_note_key is NULL.
*/
static inline void
emitter_kv_note(emitter_t *emitter, const char *json_key, const char *table_key,
emitter_type_t value_type, const void *value,
const char *table_note_key, emitter_type_t table_note_value_type,
const void *table_note_value) {
if (emitter->output == emitter_output_json) {
assert(emitter->nesting_depth > 0);
emitter_json_key_prefix(emitter);
emitter_printf(emitter, "\"%s\": ", json_key);
emitter_print_value(emitter, emitter_justify_none, -1,
value_type, value);
} else {
emitter_indent(emitter);
emitter_printf(emitter, "%s: ", table_key);
emitter_print_value(emitter, emitter_justify_none, -1,
value_type, value);
if (table_note_key != NULL) {
emitter_printf(emitter, " (%s: ", table_note_key);
emitter_print_value(emitter, emitter_justify_none, -1,
table_note_value_type, table_note_value);
emitter_printf(emitter, ")");
}
emitter_printf(emitter, "\n");
}
emitter->item_at_depth = true;
}
static inline void
emitter_kv(emitter_t *emitter, const char *json_key, const char *table_key,
emitter_type_t value_type, const void *value) {
emitter_kv_note(emitter, json_key, table_key, value_type, value, NULL,
emitter_type_bool, NULL);
}
static inline void
emitter_json_kv(emitter_t *emitter, const char *json_key,
emitter_type_t value_type, const void *value) {
if (emitter->output == emitter_output_json) {
emitter_kv(emitter, json_key, NULL, value_type, value);
}
}
static inline void
emitter_table_kv(emitter_t *emitter, const char *table_key,
emitter_type_t value_type, const void *value) {
if (emitter->output == emitter_output_table) {
emitter_kv(emitter, NULL, table_key, value_type, value);
}
}
static inline void
emitter_dict_begin(emitter_t *emitter, const char *json_key,
const char *table_header) {
if (emitter->output == emitter_output_json) {
emitter_json_key_prefix(emitter);
emitter_printf(emitter, "\"%s\": {", json_key);
emitter_nest_inc(emitter);
} else {
emitter_indent(emitter);
emitter_printf(emitter, "%s\n", table_header);
emitter_nest_inc(emitter);
}
}
static inline void
emitter_dict_end(emitter_t *emitter) {
if (emitter->output == emitter_output_json) {
assert(emitter->nesting_depth > 0);
emitter_nest_dec(emitter);
emitter_printf(emitter, "\n");
emitter_indent(emitter);
emitter_printf(emitter, "}");
} else {
emitter_nest_dec(emitter);
}
}
static inline void
emitter_json_dict_begin(emitter_t *emitter, const char *json_key) {
if (emitter->output == emitter_output_json) {
emitter_dict_begin(emitter, json_key, NULL);
}
}
static inline void
emitter_json_dict_end(emitter_t *emitter) {
if (emitter->output == emitter_output_json) {
emitter_dict_end(emitter);
}
}
static inline void
emitter_table_dict_begin(emitter_t *emitter, const char *table_key) {
if (emitter->output == emitter_output_table) {
emitter_dict_begin(emitter, NULL, table_key);
}
}
static inline void
emitter_table_dict_end(emitter_t *emitter) {
if (emitter->output == emitter_output_table) {
emitter_dict_end(emitter);
}
}
static inline void
emitter_json_arr_begin(emitter_t *emitter, const char *json_key) {
if (emitter->output == emitter_output_json) {
emitter_json_key_prefix(emitter);
emitter_printf(emitter, "\"%s\": [", json_key);
emitter_nest_inc(emitter);
}
}
static inline void
emitter_json_arr_end(emitter_t *emitter) {
if (emitter->output == emitter_output_json) {
assert(emitter->nesting_depth > 0);
emitter_nest_dec(emitter);
emitter_printf(emitter, "\n");
emitter_indent(emitter);
emitter_printf(emitter, "]");
}
}
static inline void
emitter_json_arr_obj_begin(emitter_t *emitter) {
if (emitter->output == emitter_output_json) {
emitter_json_key_prefix(emitter);
emitter_printf(emitter, "{");
emitter_nest_inc(emitter);
}
}
static inline void
emitter_json_arr_obj_end(emitter_t *emitter) {
if (emitter->output == emitter_output_json) {
assert(emitter->nesting_depth > 0);
emitter_nest_dec(emitter);
emitter_printf(emitter, "\n");
emitter_indent(emitter);
emitter_printf(emitter, "}");
}
}
static inline void
emitter_json_arr_value(emitter_t *emitter, emitter_type_t value_type,
const void *value) {
if (emitter->output == emitter_output_json) {
emitter_json_key_prefix(emitter);
emitter_print_value(emitter, emitter_justify_none, -1,
value_type, value);
}
}
static inline void
emitter_table_row(emitter_t *emitter, emitter_row_t *row) {
if (emitter->output != emitter_output_table) {
return;
}
emitter_col_t *col;
ql_foreach(col, &row->cols, link) {
emitter_print_value(emitter, col->justify, col->width,
col->type, (const void *)&col->bool_val);
}
emitter_table_printf(emitter, "\n");
}
#endif /* JEMALLOC_INTERNAL_EMITTER_H */

3
include/jemalloc/internal/extent_externs.h
View File

@ -4,9 +4,10 @@
#include "jemalloc/internal/mutex.h"
#include "jemalloc/internal/mutex_pool.h"
#include "jemalloc/internal/ph.h"
#include "jemalloc/internal/rb.h"
#include "jemalloc/internal/rtree.h"
extern size_t opt_lg_extent_max_active_fit;
extern rtree_t extents_rtree;
extern const extent_hooks_t extent_hooks_default;
extern mutex_pool_t extent_mutex_pool;

34
include/jemalloc/internal/extent_inlines.h
View File

@ -93,6 +93,12 @@ extent_committed_get(const extent_t *extent) {
EXTENT_BITS_COMMITTED_SHIFT);
}
static inline bool
extent_dumpable_get(const extent_t *extent) {
return (bool)((extent->e_bits & EXTENT_BITS_DUMPABLE_MASK) >>
EXTENT_BITS_DUMPABLE_SHIFT);
}
static inline bool
extent_slab_get(const extent_t *extent) {
return (bool)((extent->e_bits & EXTENT_BITS_SLAB_MASK) >>
@ -184,15 +190,22 @@ extent_addr_set(extent_t *extent, void *addr) {
}
static inline void
extent_addr_randomize(tsdn_t *tsdn, extent_t *extent, size_t alignment) {
extent_addr_randomize(UNUSED tsdn_t *tsdn, extent_t *extent, size_t alignment) {
assert(extent_base_get(extent) == extent_addr_get(extent));
if (alignment < PAGE) {
unsigned lg_range = LG_PAGE -
lg_floor(CACHELINE_CEILING(alignment));
size_t r =
prng_lg_range_zu(&extent_arena_get(extent)->offset_state,
size_t r;
if (!tsdn_null(tsdn)) {
tsd_t *tsd = tsdn_tsd(tsdn);
r = (size_t)prng_lg_range_u64(
tsd_offset_statep_get(tsd), lg_range);
} else {
r = prng_lg_range_zu(
&extent_arena_get(extent)->offset_state,
lg_range, true);
}
uintptr_t random_offset = ((uintptr_t)r) << (LG_PAGE -
lg_range);
extent->e_addr = (void *)((uintptr_t)extent->e_addr +
@ -269,6 +282,12 @@ extent_committed_set(extent_t *extent, bool committed) {
((uint64_t)committed << EXTENT_BITS_COMMITTED_SHIFT);
}
static inline void
extent_dumpable_set(extent_t *extent, bool dumpable) {
extent->e_bits = (extent->e_bits & ~EXTENT_BITS_DUMPABLE_MASK) |
((uint64_t)dumpable << EXTENT_BITS_DUMPABLE_SHIFT);
}
static inline void
extent_slab_set(extent_t *extent, bool slab) {
extent->e_bits = (extent->e_bits & ~EXTENT_BITS_SLAB_MASK) |
@ -283,7 +302,7 @@ extent_prof_tctx_set(extent_t *extent, prof_tctx_t *tctx) {
static inline void
extent_init(extent_t *extent, arena_t *arena, void *addr, size_t size,
bool slab, szind_t szind, size_t sn, extent_state_t state, bool zeroed,
bool committed) {
bool committed, bool dumpable) {
assert(addr == PAGE_ADDR2BASE(addr) || !slab);
extent_arena_set(extent, arena);
@ -295,6 +314,7 @@ extent_init(extent_t *extent, arena_t *arena, void *addr, size_t size,
extent_state_set(extent, state);
extent_zeroed_set(extent, zeroed);
extent_committed_set(extent, committed);
extent_dumpable_set(extent, dumpable);
ql_elm_new(extent, ql_link);
if (config_prof) {
extent_prof_tctx_set(extent, NULL);
@ -312,6 +332,7 @@ extent_binit(extent_t *extent, void *addr, size_t bsize, size_t sn) {
extent_state_set(extent, extent_state_active);
extent_zeroed_set(extent, true);
extent_committed_set(extent, true);
extent_dumpable_set(extent, true);
}
static inline void
@ -334,6 +355,11 @@ extent_list_append(extent_list_t *list, extent_t *extent) {
ql_tail_insert(list, extent, ql_link);
}
static inline void
extent_list_prepend(extent_list_t *list, extent_t *extent) {
ql_head_insert(list, extent, ql_link);
}
static inline void
extent_list_replace(extent_list_t *list, extent_t *to_remove,
extent_t *to_insert) {

84
include/jemalloc/internal/extent_structs.h
View File

@ -5,7 +5,6 @@
#include "jemalloc/internal/bitmap.h"
#include "jemalloc/internal/mutex.h"
#include "jemalloc/internal/ql.h"
#include "jemalloc/internal/rb.h"
#include "jemalloc/internal/ph.h"
#include "jemalloc/internal/size_classes.h"
@ -24,13 +23,14 @@ struct extent_s {
* a: arena_ind
* b: slab
* c: committed
* d: dumpable
* z: zeroed
* t: state
* i: szind
* f: nfree
* n: sn
*
* nnnnnnnn ... nnnnnfff fffffffi iiiiiiit tzcbaaaa aaaaaaaa
* nnnnnnnn ... nnnnffff ffffffii iiiiiitt zdcbaaaa aaaaaaaa
*
* arena_ind: Arena from which this extent came, or all 1 bits if
* unassociated.
@ -45,6 +45,23 @@ struct extent_s {
* as on a system that overcommits and satisfies physical
* memory needs on demand via soft page faults.
*
* dumpable: The dumpable flag indicates whether or not we've set the
* memory in question to be dumpable. Note that this
* interacts somewhat subtly with user-specified extent hooks,
* since we don't know if *they* are fiddling with
* dumpability (in which case, we don't want to undo whatever
* they're doing). To deal with this scenario, we:
* - Make dumpable false only for memory allocated with the
* default hooks.
* - Only allow memory to go from non-dumpable to dumpable,
* and only once.
* - Never make the OS call to allow dumping when the
* dumpable bit is already set.
* These three constraints mean that we will never
* accidentally dump user memory that the user meant to set
* nondumpable with their extent hooks.
*
*
* zeroed: The zeroed flag is used by extent recycling code to track
* whether memory is zero-filled.
*
@ -69,37 +86,41 @@ struct extent_s {
* serial number to both resulting adjacent extents.
*/
uint64_t e_bits;
#define MASK(CURRENT_FIELD_WIDTH, CURRENT_FIELD_SHIFT) ((((((uint64_t)0x1U) << (CURRENT_FIELD_WIDTH)) - 1)) << (CURRENT_FIELD_SHIFT))
#define EXTENT_BITS_ARENA_WIDTH MALLOCX_ARENA_BITS
#define EXTENT_BITS_ARENA_SHIFT 0
#define EXTENT_BITS_ARENA_MASK \
(((uint64_t)(1U << MALLOCX_ARENA_BITS) - 1) << EXTENT_BITS_ARENA_SHIFT)
#define EXTENT_BITS_ARENA_MASK MASK(EXTENT_BITS_ARENA_WIDTH, EXTENT_BITS_ARENA_SHIFT)
#define EXTENT_BITS_SLAB_SHIFT MALLOCX_ARENA_BITS
#define EXTENT_BITS_SLAB_MASK \
((uint64_t)0x1U << EXTENT_BITS_SLAB_SHIFT)
#define EXTENT_BITS_SLAB_WIDTH 1
#define EXTENT_BITS_SLAB_SHIFT (EXTENT_BITS_ARENA_WIDTH + EXTENT_BITS_ARENA_SHIFT)
#define EXTENT_BITS_SLAB_MASK MASK(EXTENT_BITS_SLAB_WIDTH, EXTENT_BITS_SLAB_SHIFT)
#define EXTENT_BITS_COMMITTED_SHIFT (MALLOCX_ARENA_BITS + 1)
#define EXTENT_BITS_COMMITTED_MASK \
((uint64_t)0x1U << EXTENT_BITS_COMMITTED_SHIFT)
#define EXTENT_BITS_COMMITTED_WIDTH 1
#define EXTENT_BITS_COMMITTED_SHIFT (EXTENT_BITS_SLAB_WIDTH + EXTENT_BITS_SLAB_SHIFT)
#define EXTENT_BITS_COMMITTED_MASK MASK(EXTENT_BITS_COMMITTED_WIDTH, EXTENT_BITS_COMMITTED_SHIFT)
#define EXTENT_BITS_ZEROED_SHIFT (MALLOCX_ARENA_BITS + 2)
#define EXTENT_BITS_ZEROED_MASK \
((uint64_t)0x1U << EXTENT_BITS_ZEROED_SHIFT)
#define EXTENT_BITS_DUMPABLE_WIDTH 1
#define EXTENT_BITS_DUMPABLE_SHIFT (EXTENT_BITS_COMMITTED_WIDTH + EXTENT_BITS_COMMITTED_SHIFT)
#define EXTENT_BITS_DUMPABLE_MASK MASK(EXTENT_BITS_DUMPABLE_WIDTH, EXTENT_BITS_DUMPABLE_SHIFT)
#define EXTENT_BITS_STATE_SHIFT (MALLOCX_ARENA_BITS + 3)
#define EXTENT_BITS_STATE_MASK \
((uint64_t)0x3U << EXTENT_BITS_STATE_SHIFT)
#define EXTENT_BITS_ZEROED_WIDTH 1
#define EXTENT_BITS_ZEROED_SHIFT (EXTENT_BITS_DUMPABLE_WIDTH + EXTENT_BITS_DUMPABLE_SHIFT)
#define EXTENT_BITS_ZEROED_MASK MASK(EXTENT_BITS_ZEROED_WIDTH, EXTENT_BITS_ZEROED_SHIFT)
#define EXTENT_BITS_SZIND_SHIFT (MALLOCX_ARENA_BITS + 5)
#define EXTENT_BITS_SZIND_MASK \
(((uint64_t)(1U << LG_CEIL_NSIZES) - 1) << EXTENT_BITS_SZIND_SHIFT)
#define EXTENT_BITS_STATE_WIDTH 2
#define EXTENT_BITS_STATE_SHIFT (EXTENT_BITS_ZEROED_WIDTH + EXTENT_BITS_ZEROED_SHIFT)
#define EXTENT_BITS_STATE_MASK MASK(EXTENT_BITS_STATE_WIDTH, EXTENT_BITS_STATE_SHIFT)
#define EXTENT_BITS_NFREE_SHIFT \
(MALLOCX_ARENA_BITS + 5 + LG_CEIL_NSIZES)
#define EXTENT_BITS_NFREE_MASK \
((uint64_t)((1U << (LG_SLAB_MAXREGS + 1)) - 1) << EXTENT_BITS_NFREE_SHIFT)
#define EXTENT_BITS_SZIND_WIDTH LG_CEIL_NSIZES
#define EXTENT_BITS_SZIND_SHIFT (EXTENT_BITS_STATE_WIDTH + EXTENT_BITS_STATE_SHIFT)
#define EXTENT_BITS_SZIND_MASK MASK(EXTENT_BITS_SZIND_WIDTH, EXTENT_BITS_SZIND_SHIFT)
#define EXTENT_BITS_SN_SHIFT \
(MALLOCX_ARENA_BITS + 5 + LG_CEIL_NSIZES + (LG_SLAB_MAXREGS + 1))
#define EXTENT_BITS_NFREE_WIDTH (LG_SLAB_MAXREGS + 1)
#define EXTENT_BITS_NFREE_SHIFT (EXTENT_BITS_SZIND_WIDTH + EXTENT_BITS_SZIND_SHIFT)
#define EXTENT_BITS_NFREE_MASK MASK(EXTENT_BITS_NFREE_WIDTH, EXTENT_BITS_NFREE_SHIFT)
#define EXTENT_BITS_SN_SHIFT (EXTENT_BITS_NFREE_WIDTH + EXTENT_BITS_NFREE_SHIFT)
#define EXTENT_BITS_SN_MASK (UINT64_MAX << EXTENT_BITS_SN_SHIFT)
/* Pointer to the extent that this structure is responsible for. */
@ -120,20 +141,19 @@ struct extent_s {
size_t e_bsize;
};
union {
/*
* List linkage, used by a variety of lists:
* - arena_bin_t's slabs_full
* - bin_t's slabs_full
* - extents_t's LRU
* - stashed dirty extents
* - arena's large allocations
*/
ql_elm(extent_t) ql_link;
/* Red-black tree linkage, used by arena's extent_avail. */
rb_node(extent_t) rb_link;
};
/* Linkage for per size class sn/address-ordered heaps. */
/*
* Linkage for per size class sn/address-ordered heaps, and
* for extent_avail
*/
phn(extent_t) ph_link;
union {
@ -148,7 +168,7 @@ struct extent_s {
};
};
typedef ql_head(extent_t) extent_list_t;
typedef rb_tree(extent_t) extent_tree_t;
typedef ph(extent_t) extent_tree_t;
typedef ph(extent_t) extent_heap_t;
/* Quantized collection of extents, with built-in LRU queue. */

8
include/jemalloc/internal/extent_types.h
View File

@ -6,4 +6,12 @@ typedef struct extents_s extents_t;
#define EXTENT_HOOKS_INITIALIZER NULL
#define EXTENT_GROW_MAX_PIND (NPSIZES - 1)
/*
* When reuse (and split) an active extent, (1U << opt_lg_extent_max_active_fit)
* is the max ratio between the size of the active extent and the new extent.
*/
#define LG_EXTENT_MAX_ACTIVE_FIT_DEFAULT 6
#endif /* JEMALLOC_INTERNAL_EXTENT_TYPES_H */

28
include/jemalloc/internal/hash.h
View File

@ -260,22 +260,22 @@ hash_x64_128(const void *key, const int len, const uint32_t seed,
uint64_t k2 = 0;
switch (len & 15) {
case 15: k2 ^= ((uint64_t)(tail[14])) << 48;
case 14: k2 ^= ((uint64_t)(tail[13])) << 40;
case 13: k2 ^= ((uint64_t)(tail[12])) << 32;
case 12: k2 ^= ((uint64_t)(tail[11])) << 24;
case 11: k2 ^= ((uint64_t)(tail[10])) << 16;
case 10: k2 ^= ((uint64_t)(tail[ 9])) << 8;
case 15: k2 ^= ((uint64_t)(tail[14])) << 48; /* falls through */
case 14: k2 ^= ((uint64_t)(tail[13])) << 40; /* falls through */
case 13: k2 ^= ((uint64_t)(tail[12])) << 32; /* falls through */
case 12: k2 ^= ((uint64_t)(tail[11])) << 24; /* falls through */
case 11: k2 ^= ((uint64_t)(tail[10])) << 16; /* falls through */
case 10: k2 ^= ((uint64_t)(tail[ 9])) << 8; /* falls through */
case 9: k2 ^= ((uint64_t)(tail[ 8])) << 0;
k2 *= c2; k2 = hash_rotl_64(k2, 33); k2 *= c1; h2 ^= k2;
case 8: k1 ^= ((uint64_t)(tail[ 7])) << 56;
case 7: k1 ^= ((uint64_t)(tail[ 6])) << 48;
case 6: k1 ^= ((uint64_t)(tail[ 5])) << 40;
case 5: k1 ^= ((uint64_t)(tail[ 4])) << 32;
case 4: k1 ^= ((uint64_t)(tail[ 3])) << 24;
case 3: k1 ^= ((uint64_t)(tail[ 2])) << 16;
case 2: k1 ^= ((uint64_t)(tail[ 1])) << 8;
/* falls through */
case 8: k1 ^= ((uint64_t)(tail[ 7])) << 56; /* falls through */
case 7: k1 ^= ((uint64_t)(tail[ 6])) << 48; /* falls through */
case 6: k1 ^= ((uint64_t)(tail[ 5])) << 40; /* falls through */
case 5: k1 ^= ((uint64_t)(tail[ 4])) << 32; /* falls through */
case 4: k1 ^= ((uint64_t)(tail[ 3])) << 24; /* falls through */
case 3: k1 ^= ((uint64_t)(tail[ 2])) << 16; /* falls through */
case 2: k1 ^= ((uint64_t)(tail[ 1])) << 8; /* falls through */
case 1: k1 ^= ((uint64_t)(tail[ 0])) << 0;
k1 *= c1; k1 = hash_rotl_64(k1, 31); k1 *= c2; h1 ^= k1;
}

11
include/jemalloc/internal/jemalloc_internal_decls.h
View File

@ -5,7 +5,16 @@
#ifdef _WIN32
# include <windows.h>
# include "msvc_compat/windows_extra.h"
# ifdef _WIN64
# if LG_VADDR <= 32
# error Generate the headers using x64 vcargs
# endif
# else
# if LG_VADDR > 32
# undef LG_VADDR
# define LG_VADDR 32
# endif
# endif
#else
# include <sys/param.h>
# include <sys/mman.h>

27
include/jemalloc/internal/jemalloc_internal_defs.h.in
View File

@ -33,6 +33,8 @@
* order to yield to another virtual CPU.
*/
#undef CPU_SPINWAIT
/* 1 if CPU_SPINWAIT is defined, 0 otherwise. */
#undef HAVE_CPU_SPINWAIT
/*
* Number of significant bits in virtual addresses. This may be less than the
@ -237,6 +239,12 @@
*/
#undef JEMALLOC_CACHE_OBLIVIOUS
/*
* If defined, enable logging facilities. We make this a configure option to
* avoid taking extra branches everywhere.
*/
#undef JEMALLOC_LOG
/*
* Darwin (OS X) uses zones to work around Mach-O symbol override shortcomings.
*/
@ -254,6 +262,12 @@
/* Defined if madvise(2) is available. */
#undef JEMALLOC_HAVE_MADVISE
/*
* Defined if transparent huge pages are supported via the MADV_[NO]HUGEPAGE
* arguments to madvise(2).
*/
#undef JEMALLOC_HAVE_MADVISE_HUGE
/*
* Methods for purging unused pages differ between operating systems.
*
@ -271,6 +285,14 @@
#undef JEMALLOC_PURGE_MADVISE_DONTNEED
#undef JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS
/* Defined if madvise(2) is available but MADV_FREE is not (x86 Linux only). */
#undef JEMALLOC_DEFINE_MADVISE_FREE
/*
* Defined if MADV_DO[NT]DUMP is supported as an argument to madvise.
*/
#undef JEMALLOC_MADVISE_DONTDUMP
/*
* Defined if transparent huge pages (THPs) are supported via the
* MADV_[NO]HUGEPAGE arguments to madvise(2), and THP support is enabled.
@ -336,4 +358,9 @@
/* If defined, jemalloc takes the malloc/free/etc. symbol names. */
#undef JEMALLOC_IS_MALLOC
/*
* Defined if strerror_r returns char * if _GNU_SOURCE is defined.
*/
#undef JEMALLOC_STRERROR_R_RETURNS_CHAR_WITH_GNU_SOURCE
#endif /* JEMALLOC_INTERNAL_DEFS_H_ */

9
include/jemalloc/internal/jemalloc_internal_inlines_a.h
View File

@ -106,16 +106,16 @@ decay_ticker_get(tsd_t *tsd, unsigned ind) {
return &tdata->decay_ticker;
}
JEMALLOC_ALWAYS_INLINE tcache_bin_t *
JEMALLOC_ALWAYS_INLINE cache_bin_t *
tcache_small_bin_get(tcache_t *tcache, szind_t binind) {
assert(binind < NBINS);
return &tcache->tbins_small[binind];
return &tcache->bins_small[binind];
}
JEMALLOC_ALWAYS_INLINE tcache_bin_t *
JEMALLOC_ALWAYS_INLINE cache_bin_t *
tcache_large_bin_get(tcache_t *tcache, szind_t binind) {
assert(binind >= NBINS &&binind < nhbins);
return &tcache->tbins_large[binind - NBINS];
return &tcache->bins_large[binind - NBINS];
}
JEMALLOC_ALWAYS_INLINE bool
@ -151,6 +151,7 @@ pre_reentrancy(tsd_t *tsd, arena_t *arena) {
assert(arena != arena_get(tsd_tsdn(tsd), 0, false));
bool fast = tsd_fast(tsd);
assert(tsd_reentrancy_level_get(tsd) < INT8_MAX);
++*tsd_reentrancy_levelp_get(tsd);
if (fast) {
/* Prepare slow path for reentrancy. */

23
include/jemalloc/internal/jemalloc_internal_inlines_c.h
View File

@ -5,6 +5,24 @@
#include "jemalloc/internal/sz.h"
#include "jemalloc/internal/witness.h"
/*
* Translating the names of the 'i' functions:
* Abbreviations used in the first part of the function name (before
* alloc/dalloc) describe what that function accomplishes:
* a: arena (query)
* s: size (query, or sized deallocation)
* e: extent (query)
* p: aligned (allocates)
* vs: size (query, without knowing that the pointer is into the heap)
* r: rallocx implementation
* x: xallocx implementation
* Abbreviations used in the second part of the function name (after
* alloc/dalloc) describe the arguments it takes
* z: whether to return zeroed memory
* t: accepts a tcache_t * parameter
* m: accepts an arena_t * parameter
*/
JEMALLOC_ALWAYS_INLINE arena_t *
iaalloc(tsdn_t *tsdn, const void *ptr) {
assert(ptr != NULL);
@ -27,8 +45,10 @@ iallocztm(tsdn_t *tsdn, size_t size, szind_t ind, bool zero, tcache_t *tcache,
assert(size != 0);
assert(!is_internal || tcache == NULL);
assert(!is_internal || arena == NULL || arena_is_auto(arena));
if (!tsdn_null(tsdn) && tsd_reentrancy_level_get(tsdn_tsd(tsdn)) == 0) {
witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
WITNESS_RANK_CORE, 0);
}
ret = arena_malloc(tsdn, arena, size, ind, zero, tcache, slow_path);
if (config_stats && is_internal && likely(ret != NULL)) {
@ -91,7 +111,8 @@ idalloctm(tsdn_t *tsdn, void *ptr, tcache_t *tcache, alloc_ctx_t *alloc_ctx,
if (config_stats && is_internal) {
arena_internal_sub(iaalloc(tsdn, ptr), isalloc(tsdn, ptr));
}
if (!is_internal && tsd_reentrancy_level_get(tsdn_tsd(tsdn)) != 0) {
if (!is_internal && !tsdn_null(tsdn) &&
tsd_reentrancy_level_get(tsdn_tsd(tsdn)) != 0) {
assert(tcache == NULL);
}
arena_dalloc(tsdn, ptr, tcache, alloc_ctx, slow_path);

3
include/jemalloc/internal/jemalloc_internal_macros.h
View File

@ -37,4 +37,7 @@
# define JET_MUTABLE const
#endif
#define JEMALLOC_VA_ARGS_HEAD(head, ...) head
#define JEMALLOC_VA_ARGS_TAIL(head, ...) __VA_ARGS__
#endif /* JEMALLOC_INTERNAL_MACROS_H */

11
include/jemalloc/internal/jemalloc_internal_types.h
View File

@ -79,22 +79,29 @@ typedef int malloc_cpuid_t;
# ifdef __hppa__
# define LG_QUANTUM 4
# endif
# ifdef __m68k__
# define LG_QUANTUM 3
# endif
# ifdef __mips__
# define LG_QUANTUM 3
# endif
# ifdef __nios2__
# define LG_QUANTUM 3
# endif
# ifdef __or1k__
# define LG_QUANTUM 3
# endif
# ifdef __powerpc__
# define LG_QUANTUM 4
# endif
# ifdef __riscv__
# if defined(__riscv) || defined(__riscv__)
# define LG_QUANTUM 4
# endif
# ifdef __s390__
# define LG_QUANTUM 4
# endif
# ifdef __SH4__
# if (defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || \
defined(__SH4_SINGLE_ONLY__))
# define LG_QUANTUM 4
# endif
# ifdef __tile__

29
include/jemalloc/internal/jemalloc_preamble.h.in
View File

@ -47,6 +47,10 @@
#endif
#include "jemalloc/internal/hooks.h"
#ifdef JEMALLOC_DEFINE_MADVISE_FREE
# define JEMALLOC_MADV_FREE 8
#endif
static const bool config_debug =
#ifdef JEMALLOC_DEBUG
true
@ -61,6 +65,13 @@ static const bool have_dss =
false
#endif
;
static const bool have_madvise_huge =
#ifdef JEMALLOC_HAVE_MADVISE_HUGE
true
#else
false
#endif
;
static const bool config_fill =
#ifdef JEMALLOC_FILL
true
@ -111,13 +122,6 @@ static const bool config_stats =
false
#endif
;
static const bool config_thp =
#ifdef JEMALLOC_THP
true
#else
false
#endif
;
static const bool config_tls =
#ifdef JEMALLOC_TLS
true
@ -146,6 +150,17 @@ static const bool config_cache_oblivious =
false
#endif
;
/*
* Undocumented, for jemalloc development use only at the moment. See the note
* in jemalloc/internal/log.h.
*/
static const bool config_log =
#ifdef JEMALLOC_LOG
true
#else
false
#endif
;
#ifdef JEMALLOC_HAVE_SCHED_GETCPU
/* Currently percpu_arena depends on sched_getcpu. */
#define JEMALLOC_PERCPU_ARENA

115
include/jemalloc/internal/log.h Normal file
View File

@ -0,0 +1,115 @@
#ifndef JEMALLOC_INTERNAL_LOG_H
#define JEMALLOC_INTERNAL_LOG_H
#include "jemalloc/internal/atomic.h"
#include "jemalloc/internal/malloc_io.h"
#include "jemalloc/internal/mutex.h"
#ifdef JEMALLOC_LOG
# define JEMALLOC_LOG_VAR_BUFSIZE 1000
#else
# define JEMALLOC_LOG_VAR_BUFSIZE 1
#endif
#define JEMALLOC_LOG_BUFSIZE 4096
/*
* The log malloc_conf option is a '|'-delimited list of log_var name segments
* which should be logged. The names are themselves hierarchical, with '.' as
* the delimiter (a "segment" is just a prefix in the log namespace). So, if
* you have:
*
* log("arena", "log msg for arena"); // 1
* log("arena.a", "log msg for arena.a"); // 2
* log("arena.b", "log msg for arena.b"); // 3
* log("arena.a.a", "log msg for arena.a.a"); // 4
* log("extent.a", "log msg for extent.a"); // 5
* log("extent.b", "log msg for extent.b"); // 6
*
* And your malloc_conf option is "log=arena.a|extent", then lines 2, 4, 5, and
* 6 will print at runtime. You can enable logging from all log vars by
* writing "log=.".
*
* None of this should be regarded as a stable API for right now. It's intended
* as a debugging interface, to let us keep around some of our printf-debugging
* statements.
*/
extern char log_var_names[JEMALLOC_LOG_VAR_BUFSIZE];
extern atomic_b_t log_init_done;
typedef struct log_var_s log_var_t;
struct log_var_s {
/*
* Lowest bit is "inited", second lowest is "enabled". Putting them in
* a single word lets us avoid any fences on weak architectures.
*/
atomic_u_t state;
const char *name;
};
#define LOG_NOT_INITIALIZED 0U
#define LOG_INITIALIZED_NOT_ENABLED 1U
#define LOG_ENABLED 2U
#define LOG_VAR_INIT(name_str) {ATOMIC_INIT(LOG_NOT_INITIALIZED), name_str}
/*
* Returns the value we should assume for state (which is not necessarily
* accurate; if logging is done before logging has finished initializing, then
* we default to doing the safe thing by logging everything).
*/
unsigned log_var_update_state(log_var_t *log_var);
/* We factor out the metadata management to allow us to test more easily. */
#define log_do_begin(log_var) \
if (config_log) { \
unsigned log_state = atomic_load_u(&(log_var).state, \
ATOMIC_RELAXED); \
if (unlikely(log_state == LOG_NOT_INITIALIZED)) { \
log_state = log_var_update_state(&(log_var)); \
assert(log_state != LOG_NOT_INITIALIZED); \
} \
if (log_state == LOG_ENABLED) { \
{
/* User code executes here. */
#define log_do_end(log_var) \
} \
} \
}
/*
* MSVC has some preprocessor bugs in its expansion of __VA_ARGS__ during
* preprocessing. To work around this, we take all potential extra arguments in
* a var-args functions. Since a varargs macro needs at least one argument in
* the "...", we accept the format string there, and require that the first
* argument in this "..." is a const char *.
*/
static inline void
log_impl_varargs(const char *name, ...) {
char buf[JEMALLOC_LOG_BUFSIZE];
va_list ap;
va_start(ap, name);
const char *format = va_arg(ap, const char *);
size_t dst_offset = 0;
dst_offset += malloc_snprintf(buf, JEMALLOC_LOG_BUFSIZE, "%s: ", name);
dst_offset += malloc_vsnprintf(buf + dst_offset,
JEMALLOC_LOG_BUFSIZE - dst_offset, format, ap);
dst_offset += malloc_snprintf(buf + dst_offset,
JEMALLOC_LOG_BUFSIZE - dst_offset, "\n");
va_end(ap);
malloc_write(buf);
}
/* Call as log("log.var.str", "format_string %d", arg_for_format_string); */
#define LOG(log_var_str, ...) \
do { \
static log_var_t log_var = LOG_VAR_INIT(log_var_str); \
log_do_begin(log_var) \
log_impl_varargs((log_var).name, __VA_ARGS__); \
log_do_end(log_var) \
} while (0)
#endif /* JEMALLOC_INTERNAL_LOG_H */

40
include/jemalloc/internal/malloc_io.h
View File

@ -53,10 +53,50 @@ size_t malloc_vsnprintf(char *str, size_t size, const char *format,
va_list ap);
size_t malloc_snprintf(char *str, size_t size, const char *format, ...)
JEMALLOC_FORMAT_PRINTF(3, 4);
/*
* The caller can set write_cb and cbopaque to null to choose to print with the
* je_malloc_message hook.
*/
void malloc_vcprintf(void (*write_cb)(void *, const char *), void *cbopaque,
const char *format, va_list ap);
void malloc_cprintf(void (*write_cb)(void *, const char *), void *cbopaque,
const char *format, ...) JEMALLOC_FORMAT_PRINTF(3, 4);
void malloc_printf(const char *format, ...) JEMALLOC_FORMAT_PRINTF(1, 2);
static inline ssize_t
malloc_write_fd(int fd, const void *buf, size_t count) {
#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_write)
/*
* Use syscall(2) rather than write(2) when possible in order to avoid
* the possibility of memory allocation within libc. This is necessary
* on FreeBSD; most operating systems do not have this problem though.
*
* syscall() returns long or int, depending on platform, so capture the
* result in the widest plausible type to avoid compiler warnings.
*/
long result = syscall(SYS_write, fd, buf, count);
#else
ssize_t result = (ssize_t)write(fd, buf,
#ifdef _WIN32
(unsigned int)
#endif
count);
#endif
return (ssize_t)result;
}
static inline ssize_t
malloc_read_fd(int fd, void *buf, size_t count) {
#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_read)
long result = syscall(SYS_read, fd, buf, count);
#else
ssize_t result = read(fd, buf,
#ifdef _WIN32
(unsigned int)
#endif
count);
#endif
return (ssize_t)result;
}
#endif /* JEMALLOC_INTERNAL_MALLOC_IO_H */

39
include/jemalloc/internal/mutex_prof.h
View File

@ -35,21 +35,34 @@ typedef enum {
mutex_prof_num_arena_mutexes
} mutex_prof_arena_ind_t;
#define MUTEX_PROF_COUNTERS \
OP(num_ops, uint64_t) \
OP(num_wait, uint64_t) \
OP(num_spin_acq, uint64_t) \
OP(num_owner_switch, uint64_t) \
OP(total_wait_time, uint64_t) \
OP(max_wait_time, uint64_t) \
OP(max_num_thds, uint32_t)
#define MUTEX_PROF_UINT64_COUNTERS \
OP(num_ops, uint64_t, "n_lock_ops") \
OP(num_wait, uint64_t, "n_waiting") \
OP(num_spin_acq, uint64_t, "n_spin_acq") \
OP(num_owner_switch, uint64_t, "n_owner_switch") \
OP(total_wait_time, uint64_t, "total_wait_ns") \
OP(max_wait_time, uint64_t, "max_wait_ns")
typedef enum {
#define OP(counter, type) mutex_counter_##counter,
MUTEX_PROF_COUNTERS
#define MUTEX_PROF_UINT32_COUNTERS \
OP(max_num_thds, uint32_t, "max_n_thds")
#define MUTEX_PROF_COUNTERS \
MUTEX_PROF_UINT64_COUNTERS \
MUTEX_PROF_UINT32_COUNTERS
#define OP(counter, type, human) mutex_counter_##counter,
#define COUNTER_ENUM(counter_list, t) \
typedef enum { \
counter_list \
mutex_prof_num_##t##_counters \
} mutex_prof_##t##_counter_ind_t;
COUNTER_ENUM(MUTEX_PROF_UINT64_COUNTERS, uint64_t)
COUNTER_ENUM(MUTEX_PROF_UINT32_COUNTERS, uint32_t)
#undef COUNTER_ENUM
#undef OP
mutex_prof_num_counters
} mutex_prof_counter_ind_t;
typedef struct {
/*

17
include/jemalloc/internal/pages.h
View File

@ -58,6 +58,20 @@ static const bool pages_can_purge_forced =
#endif
;
typedef enum {
thp_mode_default = 0, /* Do not change hugepage settings. */
thp_mode_always = 1, /* Always set MADV_HUGEPAGE. */
thp_mode_never = 2, /* Always set MADV_NOHUGEPAGE. */
thp_mode_names_limit = 3, /* Used for option processing. */
thp_mode_not_supported = 3 /* No THP support detected. */
} thp_mode_t;
#define THP_MODE_DEFAULT thp_mode_default
extern thp_mode_t opt_thp;
extern thp_mode_t init_system_thp_mode; /* Initial system wide state. */
extern const char *thp_mode_names[];
void *pages_map(void *addr, size_t size, size_t alignment, bool *commit);
void pages_unmap(void *addr, size_t size);
bool pages_commit(void *addr, size_t size);
@ -66,6 +80,9 @@ bool pages_purge_lazy(void *addr, size_t size);
bool pages_purge_forced(void *addr, size_t size);
bool pages_huge(void *addr, size_t size);
bool pages_nohuge(void *addr, size_t size);
bool pages_dontdump(void *addr, size_t size);
bool pages_dodump(void *addr, size_t size);
bool pages_boot(void);
void pages_set_thp_state (void *ptr, size_t size);
#endif /* JEMALLOC_INTERNAL_PAGES_EXTERNS_H */

11
include/jemalloc/internal/prof_inlines_a.h
View File

@ -69,4 +69,15 @@ prof_accum_cancel(tsdn_t *tsdn, prof_accum_t *prof_accum, size_t usize) {
#endif
}
JEMALLOC_ALWAYS_INLINE bool
prof_active_get_unlocked(void) {
/*
* Even if opt_prof is true, sampling can be temporarily disabled by
* setting prof_active to false. No locking is used when reading
* prof_active in the fast path, so there are no guarantees regarding
* how long it will take for all threads to notice state changes.
*/
return prof_active;
}
#endif /* JEMALLOC_INTERNAL_PROF_INLINES_A_H */

11
include/jemalloc/internal/prof_inlines_b.h
View File

@ -3,17 +3,6 @@
#include "jemalloc/internal/sz.h"
JEMALLOC_ALWAYS_INLINE bool
prof_active_get_unlocked(void) {
/*
* Even if opt_prof is true, sampling can be temporarily disabled by
* setting prof_active to false. No locking is used when reading
* prof_active in the fast path, so there are no guarantees regarding
* how long it will take for all threads to notice state changes.
*/
return prof_active;
}
JEMALLOC_ALWAYS_INLINE bool
prof_gdump_get_unlocked(void) {
/*

42
include/jemalloc/internal/rtree.h
View File

@ -178,9 +178,21 @@ rtree_leaf_elm_bits_read(tsdn_t *tsdn, rtree_t *rtree, rtree_leaf_elm_t *elm,
JEMALLOC_ALWAYS_INLINE extent_t *
rtree_leaf_elm_bits_extent_get(uintptr_t bits) {
# ifdef __aarch64__
/*
* aarch64 doesn't sign extend the highest virtual address bit to set
* the higher ones. Instead, the high bits gets zeroed.
*/
uintptr_t high_bit_mask = ((uintptr_t)1 << LG_VADDR) - 1;
/* Mask off the slab bit. */
uintptr_t low_bit_mask = ~(uintptr_t)1;
uintptr_t mask = high_bit_mask & low_bit_mask;
return (extent_t *)(bits & mask);
# else
/* Restore sign-extended high bits, mask slab bit. */
return (extent_t *)((uintptr_t)((intptr_t)(bits << RTREE_NHIB) >>
RTREE_NHIB) & ~((uintptr_t)0x1));
# endif
}
JEMALLOC_ALWAYS_INLINE szind_t
@ -196,8 +208,8 @@ rtree_leaf_elm_bits_slab_get(uintptr_t bits) {
# endif
JEMALLOC_ALWAYS_INLINE extent_t *
rtree_leaf_elm_extent_read(tsdn_t *tsdn, rtree_t *rtree, rtree_leaf_elm_t *elm,
bool dependent) {
rtree_leaf_elm_extent_read(UNUSED tsdn_t *tsdn, UNUSED rtree_t *rtree,
rtree_leaf_elm_t *elm, bool dependent) {
#ifdef RTREE_LEAF_COMPACT
uintptr_t bits = rtree_leaf_elm_bits_read(tsdn, rtree, elm, dependent);
return rtree_leaf_elm_bits_extent_get(bits);
@ -209,8 +221,8 @@ rtree_leaf_elm_extent_read(tsdn_t *tsdn, rtree_t *rtree, rtree_leaf_elm_t *elm,
}
JEMALLOC_ALWAYS_INLINE szind_t
rtree_leaf_elm_szind_read(tsdn_t *tsdn, rtree_t *rtree, rtree_leaf_elm_t *elm,
bool dependent) {
rtree_leaf_elm_szind_read(UNUSED tsdn_t *tsdn, UNUSED rtree_t *rtree,
rtree_leaf_elm_t *elm, bool dependent) {
#ifdef RTREE_LEAF_COMPACT
uintptr_t bits = rtree_leaf_elm_bits_read(tsdn, rtree, elm, dependent);
return rtree_leaf_elm_bits_szind_get(bits);
@ -221,8 +233,8 @@ rtree_leaf_elm_szind_read(tsdn_t *tsdn, rtree_t *rtree, rtree_leaf_elm_t *elm,
}
JEMALLOC_ALWAYS_INLINE bool
rtree_leaf_elm_slab_read(tsdn_t *tsdn, rtree_t *rtree, rtree_leaf_elm_t *elm,
bool dependent) {
rtree_leaf_elm_slab_read(UNUSED tsdn_t *tsdn, UNUSED rtree_t *rtree,
rtree_leaf_elm_t *elm, bool dependent) {
#ifdef RTREE_LEAF_COMPACT
uintptr_t bits = rtree_leaf_elm_bits_read(tsdn, rtree, elm, dependent);
return rtree_leaf_elm_bits_slab_get(bits);
@ -233,8 +245,8 @@ rtree_leaf_elm_slab_read(tsdn_t *tsdn, rtree_t *rtree, rtree_leaf_elm_t *elm,
}
static inline void
rtree_leaf_elm_extent_write(tsdn_t *tsdn, rtree_t *rtree, rtree_leaf_elm_t *elm,
extent_t *extent) {
rtree_leaf_elm_extent_write(UNUSED tsdn_t *tsdn, UNUSED rtree_t *rtree,
rtree_leaf_elm_t *elm, extent_t *extent) {
#ifdef RTREE_LEAF_COMPACT
uintptr_t old_bits = rtree_leaf_elm_bits_read(tsdn, rtree, elm, true);
uintptr_t bits = ((uintptr_t)rtree_leaf_elm_bits_szind_get(old_bits) <<
@ -247,8 +259,8 @@ rtree_leaf_elm_extent_write(tsdn_t *tsdn, rtree_t *rtree, rtree_leaf_elm_t *elm,
}
static inline void
rtree_leaf_elm_szind_write(tsdn_t *tsdn, rtree_t *rtree, rtree_leaf_elm_t *elm,
szind_t szind) {
rtree_leaf_elm_szind_write(UNUSED tsdn_t *tsdn, UNUSED rtree_t *rtree,
rtree_leaf_elm_t *elm, szind_t szind) {
assert(szind <= NSIZES);
#ifdef RTREE_LEAF_COMPACT
@ -265,8 +277,8 @@ rtree_leaf_elm_szind_write(tsdn_t *tsdn, rtree_t *rtree, rtree_leaf_elm_t *elm,
}
static inline void
rtree_leaf_elm_slab_write(tsdn_t *tsdn, rtree_t *rtree, rtree_leaf_elm_t *elm,
bool slab) {
rtree_leaf_elm_slab_write(UNUSED tsdn_t *tsdn, UNUSED rtree_t *rtree,
rtree_leaf_elm_t *elm, bool slab) {
#ifdef RTREE_LEAF_COMPACT
uintptr_t old_bits = rtree_leaf_elm_bits_read(tsdn, rtree, elm,
true);
@ -448,8 +460,14 @@ rtree_szind_slab_read(tsdn_t *tsdn, rtree_t *rtree, rtree_ctx_t *rtree_ctx,
if (!dependent && elm == NULL) {
return true;
}
#ifdef RTREE_LEAF_COMPACT
uintptr_t bits = rtree_leaf_elm_bits_read(tsdn, rtree, elm, dependent);
*r_szind = rtree_leaf_elm_bits_szind_get(bits);
*r_slab = rtree_leaf_elm_bits_slab_get(bits);
#else
*r_szind = rtree_leaf_elm_szind_read(tsdn, rtree, elm, dependent);
*r_slab = rtree_leaf_elm_slab_read(tsdn, rtree, elm, dependent);
#endif
return false;
}

2
include/jemalloc/internal/rtree_tsd.h
View File

@ -26,7 +26,7 @@
* Zero initializer required for tsd initialization only. Proper initialization
* done via rtree_ctx_data_init().
*/
#define RTREE_CTX_ZERO_INITIALIZER {{{0}}}
#define RTREE_CTX_ZERO_INITIALIZER {{{0}}, {{0}}}
typedef struct rtree_leaf_elm_s rtree_leaf_elm_t;

20
include/jemalloc/internal/spin.h
View File

@ -1,25 +1,29 @@
#ifndef JEMALLOC_INTERNAL_SPIN_H
#define JEMALLOC_INTERNAL_SPIN_H
#ifdef JEMALLOC_SPIN_C_
# define SPIN_INLINE extern inline
#else
# define SPIN_INLINE inline
#endif
#define SPIN_INITIALIZER {0U}
typedef struct {
unsigned iteration;
} spin_t;
SPIN_INLINE void
static inline void
spin_cpu_spinwait() {
# if HAVE_CPU_SPINWAIT
CPU_SPINWAIT;
# else
volatile int x = 0;
x = x;
# endif
}
static inline void
spin_adaptive(spin_t *spin) {
volatile uint32_t i;
if (spin->iteration < 5) {
for (i = 0; i < (1U << spin->iteration); i++) {
CPU_SPINWAIT;
spin_cpu_spinwait();
}
spin->iteration++;
} else {

134
include/jemalloc/internal/stats.h
View File

@ -1,12 +1,6 @@
#ifndef JEMALLOC_INTERNAL_STATS_H
#define JEMALLOC_INTERNAL_STATS_H
#include "jemalloc/internal/atomic.h"
#include "jemalloc/internal/mutex_prof.h"
#include "jemalloc/internal/mutex.h"
#include "jemalloc/internal/size_classes.h"
#include "jemalloc/internal/stats_tsd.h"
/* OPTION(opt, var_name, default, set_value_to) */
#define STATS_PRINT_OPTIONS \
OPTION('J', json, false, true) \
@ -33,132 +27,4 @@ extern char opt_stats_print_opts[stats_print_tot_num_options+1];
void stats_print(void (*write_cb)(void *, const char *), void *cbopaque,
const char *opts);
/*
* In those architectures that support 64-bit atomics, we use atomic updates for
* our 64-bit values. Otherwise, we use a plain uint64_t and synchronize
* externally.
*/
#ifdef JEMALLOC_ATOMIC_U64
typedef atomic_u64_t arena_stats_u64_t;
#else
/* Must hold the arena stats mutex while reading atomically. */
typedef uint64_t arena_stats_u64_t;
#endif
typedef struct malloc_bin_stats_s {
/*
* Total number of allocation/deallocation requests served directly by
* the bin. Note that tcache may allocate an object, then recycle it
* many times, resulting many increments to nrequests, but only one
* each to nmalloc and ndalloc.
*/
uint64_t nmalloc;
uint64_t ndalloc;
/*
* Number of allocation requests that correspond to the size of this
* bin. This includes requests served by tcache, though tcache only
* periodically merges into this counter.
*/
uint64_t nrequests;
/*
* Current number of regions of this size class, including regions
* currently cached by tcache.
*/
size_t curregs;
/* Number of tcache fills from this bin. */
uint64_t nfills;
/* Number of tcache flushes to this bin. */
uint64_t nflushes;
/* Total number of slabs created for this bin's size class. */
uint64_t nslabs;
/*
* Total number of slabs reused by extracting them from the slabs heap
* for this bin's size class.
*/
uint64_t reslabs;
/* Current number of slabs in this bin. */
size_t curslabs;
mutex_prof_data_t mutex_data;
} malloc_bin_stats_t;
typedef struct malloc_large_stats_s {
/*
* Total number of allocation/deallocation requests served directly by
* the arena.
*/
arena_stats_u64_t nmalloc;
arena_stats_u64_t ndalloc;
/*
* Number of allocation requests that correspond to this size class.
* This includes requests served by tcache, though tcache only
* periodically merges into this counter.
*/
arena_stats_u64_t nrequests; /* Partially derived. */
/* Current number of allocations of this size class. */
size_t curlextents; /* Derived. */
} malloc_large_stats_t;
typedef struct decay_stats_s {
/* Total number of purge sweeps. */
arena_stats_u64_t npurge;
/* Total number of madvise calls made. */
arena_stats_u64_t nmadvise;
/* Total number of pages purged. */
arena_stats_u64_t purged;
} decay_stats_t;
/*
* Arena stats. Note that fields marked "derived" are not directly maintained
* within the arena code; rather their values are derived during stats merge
* requests.
*/
typedef struct arena_stats_s {
#ifndef JEMALLOC_ATOMIC_U64
malloc_mutex_t mtx;
#endif
/* Number of bytes currently mapped, excluding retained memory. */
atomic_zu_t mapped; /* Partially derived. */
/*
* Number of unused virtual memory bytes currently retained. Retained
* bytes are technically mapped (though always decommitted or purged),
* but they are excluded from the mapped statistic (above).
*/
atomic_zu_t retained; /* Derived. */
decay_stats_t decay_dirty;
decay_stats_t decay_muzzy;
atomic_zu_t base; /* Derived. */
atomic_zu_t internal;
atomic_zu_t resident; /* Derived. */
atomic_zu_t allocated_large; /* Derived. */
arena_stats_u64_t nmalloc_large; /* Derived. */
arena_stats_u64_t ndalloc_large; /* Derived. */
arena_stats_u64_t nrequests_large; /* Derived. */
/* Number of bytes cached in tcache associated with this arena. */
atomic_zu_t tcache_bytes; /* Derived. */
mutex_prof_data_t mutex_prof_data[mutex_prof_num_arena_mutexes];
/* One element for each large size class. */
malloc_large_stats_t lstats[NSIZES - NBINS];
/* Arena uptime. */
nstime_t uptime;
} arena_stats_t;
#endif /* JEMALLOC_INTERNAL_STATS_H */

12
include/jemalloc/internal/stats_tsd.h
View File

@ -1,12 +0,0 @@
#ifndef JEMALLOC_INTERNAL_STATS_TSD_H
#define JEMALLOC_INTERNAL_STATS_TSD_H
typedef struct tcache_bin_stats_s {
/*
* Number of allocation requests that corresponded to the size of this
* bin.
*/
uint64_t nrequests;
} tcache_bin_stats_t;
#endif /* JEMALLOC_INTERNAL_STATS_TSD_H */

4
include/jemalloc/internal/sz.h
View File

@ -61,7 +61,7 @@ sz_psz2ind(size_t psz) {
pszind_t lg_delta = (x < LG_SIZE_CLASS_GROUP + LG_PAGE + 1) ?
LG_PAGE : x - LG_SIZE_CLASS_GROUP - 1;
size_t delta_inverse_mask = ZD(-1) << lg_delta;
size_t delta_inverse_mask = ZU(-1) << lg_delta;
pszind_t mod = ((((psz-1) & delta_inverse_mask) >> lg_delta)) &
((ZU(1) << LG_SIZE_CLASS_GROUP) - 1);
@ -142,7 +142,7 @@ sz_size2index_compute(size_t size) {
szind_t lg_delta = (x < LG_SIZE_CLASS_GROUP + LG_QUANTUM + 1)
? LG_QUANTUM : x - LG_SIZE_CLASS_GROUP - 1;
size_t delta_inverse_mask = ZD(-1) << lg_delta;
size_t delta_inverse_mask = ZU(-1) << lg_delta;
szind_t mod = ((((size-1) & delta_inverse_mask) >> lg_delta)) &
((ZU(1) << LG_SIZE_CLASS_GROUP) - 1);

8
include/jemalloc/internal/tcache_externs.h
View File

@ -6,7 +6,7 @@
extern bool opt_tcache;
extern ssize_t opt_lg_tcache_max;
extern tcache_bin_info_t *tcache_bin_info;
extern cache_bin_info_t *tcache_bin_info;
/*
* Number of tcache bins. There are NBINS small-object bins, plus 0 or more
@ -30,10 +30,10 @@ extern tcaches_t *tcaches;
size_t tcache_salloc(tsdn_t *tsdn, const void *ptr);
void tcache_event_hard(tsd_t *tsd, tcache_t *tcache);
void *tcache_alloc_small_hard(tsdn_t *tsdn, arena_t *arena, tcache_t *tcache,
tcache_bin_t *tbin, szind_t binind, bool *tcache_success);
void tcache_bin_flush_small(tsd_t *tsd, tcache_t *tcache, tcache_bin_t *tbin,
cache_bin_t *tbin, szind_t binind, bool *tcache_success);
void tcache_bin_flush_small(tsd_t *tsd, tcache_t *tcache, cache_bin_t *tbin,
szind_t binind, unsigned rem);
void tcache_bin_flush_large(tsd_t *tsd, tcache_bin_t *tbin, szind_t binind,
void tcache_bin_flush_large(tsd_t *tsd, cache_bin_t *tbin, szind_t binind,
unsigned rem, tcache_t *tcache);
void tcache_arena_reassociate(tsdn_t *tsdn, tcache_t *tcache,
arena_t *arena);

99
include/jemalloc/internal/tcache_inlines.h
View File

@ -1,6 +1,7 @@
#ifndef JEMALLOC_INTERNAL_TCACHE_INLINES_H
#define JEMALLOC_INTERNAL_TCACHE_INLINES_H
#include "jemalloc/internal/bin.h"
#include "jemalloc/internal/jemalloc_internal_types.h"
#include "jemalloc/internal/size_classes.h"
#include "jemalloc/internal/sz.h"
@ -38,43 +39,16 @@ tcache_event(tsd_t *tsd, tcache_t *tcache) {
}
JEMALLOC_ALWAYS_INLINE void *
tcache_alloc_easy(tcache_bin_t *tbin, bool *tcache_success) {
tcache_alloc_small(tsd_t *tsd, arena_t *arena, tcache_t *tcache,
UNUSED size_t size, szind_t binind, bool zero, bool slow_path) {
void *ret;
if (unlikely(tbin->ncached == 0)) {
tbin->low_water = -1;
*tcache_success = false;
return NULL;
}
/*
* tcache_success (instead of ret) should be checked upon the return of
* this function. We avoid checking (ret == NULL) because there is
* never a null stored on the avail stack (which is unknown to the
* compiler), and eagerly checking ret would cause pipeline stall
* (waiting for the cacheline).
*/
*tcache_success = true;
ret = *(tbin->avail - tbin->ncached);
tbin->ncached--;
if (unlikely((low_water_t)tbin->ncached < tbin->low_water)) {
tbin->low_water = tbin->ncached;
}
return ret;
}
JEMALLOC_ALWAYS_INLINE void *
tcache_alloc_small(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
szind_t binind, bool zero, bool slow_path) {
void *ret;
tcache_bin_t *tbin;
cache_bin_t *bin;
bool tcache_success;
size_t usize JEMALLOC_CC_SILENCE_INIT(0);
assert(binind < NBINS);
tbin = tcache_small_bin_get(tcache, binind);
ret = tcache_alloc_easy(tbin, &tcache_success);
bin = tcache_small_bin_get(tcache, binind);
ret = cache_bin_alloc_easy(bin, &tcache_success);
assert(tcache_success == (ret != NULL));
if (unlikely(!tcache_success)) {
bool tcache_hard_success;
@ -84,7 +58,7 @@ tcache_alloc_small(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
}
ret = tcache_alloc_small_hard(tsd_tsdn(tsd), arena, tcache,
tbin, binind, &tcache_hard_success);
bin, binind, &tcache_hard_success);
if (tcache_hard_success == false) {
return NULL;
}
@ -103,22 +77,21 @@ tcache_alloc_small(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
if (likely(!zero)) {
if (slow_path && config_fill) {
if (unlikely(opt_junk_alloc)) {
arena_alloc_junk_small(ret,
&arena_bin_info[binind], false);
arena_alloc_junk_small(ret, &bin_infos[binind],
false);
} else if (unlikely(opt_zero)) {
memset(ret, 0, usize);
}
}
} else {
if (slow_path && config_fill && unlikely(opt_junk_alloc)) {
arena_alloc_junk_small(ret, &arena_bin_info[binind],
true);
arena_alloc_junk_small(ret, &bin_infos[binind], true);
}
memset(ret, 0, usize);
}
if (config_stats) {
tbin->tstats.nrequests++;
bin->tstats.nrequests++;
}
if (config_prof) {
tcache->prof_accumbytes += usize;
@ -131,12 +104,12 @@ JEMALLOC_ALWAYS_INLINE void *
tcache_alloc_large(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
szind_t binind, bool zero, bool slow_path) {
void *ret;
tcache_bin_t *tbin;
cache_bin_t *bin;
bool tcache_success;
assert(binind >= NBINS &&binind < nhbins);
tbin = tcache_large_bin_get(tcache, binind);
ret = tcache_alloc_easy(tbin, &tcache_success);
bin = tcache_large_bin_get(tcache, binind);
ret = cache_bin_alloc_easy(bin, &tcache_success);
assert(tcache_success == (ret != NULL));
if (unlikely(!tcache_success)) {
/*
@ -176,7 +149,7 @@ tcache_alloc_large(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
}
if (config_stats) {
tbin->tstats.nrequests++;
bin->tstats.nrequests++;
}
if (config_prof) {
tcache->prof_accumbytes += usize;
@ -190,24 +163,24 @@ tcache_alloc_large(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
JEMALLOC_ALWAYS_INLINE void
tcache_dalloc_small(tsd_t *tsd, tcache_t *tcache, void *ptr, szind_t binind,
bool slow_path) {
tcache_bin_t *tbin;
tcache_bin_info_t *tbin_info;
cache_bin_t *bin;
cache_bin_info_t *bin_info;
assert(tcache_salloc(tsd_tsdn(tsd), ptr) <= SMALL_MAXCLASS);
if (slow_path && config_fill && unlikely(opt_junk_free)) {
arena_dalloc_junk_small(ptr, &arena_bin_info[binind]);
arena_dalloc_junk_small(ptr, &bin_infos[binind]);
}
tbin = tcache_small_bin_get(tcache, binind);
tbin_info = &tcache_bin_info[binind];
if (unlikely(tbin->ncached == tbin_info->ncached_max)) {
tcache_bin_flush_small(tsd, tcache, tbin, binind,
(tbin_info->ncached_max >> 1));
bin = tcache_small_bin_get(tcache, binind);
bin_info = &tcache_bin_info[binind];
if (unlikely(bin->ncached == bin_info->ncached_max)) {
tcache_bin_flush_small(tsd, tcache, bin, binind,
(bin_info->ncached_max >> 1));
}
assert(tbin->ncached < tbin_info->ncached_max);
tbin->ncached++;
*(tbin->avail - tbin->ncached) = ptr;
assert(bin->ncached < bin_info->ncached_max);
bin->ncached++;
*(bin->avail - bin->ncached) = ptr;
tcache_event(tsd, tcache);
}
@ -215,8 +188,8 @@ tcache_dalloc_small(tsd_t *tsd, tcache_t *tcache, void *ptr, szind_t binind,
JEMALLOC_ALWAYS_INLINE void
tcache_dalloc_large(tsd_t *tsd, tcache_t *tcache, void *ptr, szind_t binind,
bool slow_path) {
tcache_bin_t *tbin;
tcache_bin_info_t *tbin_info;
cache_bin_t *bin;
cache_bin_info_t *bin_info;
assert(tcache_salloc(tsd_tsdn(tsd), ptr) > SMALL_MAXCLASS);
assert(tcache_salloc(tsd_tsdn(tsd), ptr) <= tcache_maxclass);
@ -225,15 +198,15 @@ tcache_dalloc_large(tsd_t *tsd, tcache_t *tcache, void *ptr, szind_t binind,
large_dalloc_junk(ptr, sz_index2size(binind));
}
tbin = tcache_large_bin_get(tcache, binind);
tbin_info = &tcache_bin_info[binind];
if (unlikely(tbin->ncached == tbin_info->ncached_max)) {
tcache_bin_flush_large(tsd, tbin, binind,
(tbin_info->ncached_max >> 1), tcache);
bin = tcache_large_bin_get(tcache, binind);
bin_info = &tcache_bin_info[binind];
if (unlikely(bin->ncached == bin_info->ncached_max)) {
tcache_bin_flush_large(tsd, bin, binind,
(bin_info->ncached_max >> 1), tcache);
}
assert(tbin->ncached < tbin_info->ncached_max);
tbin->ncached++;
*(tbin->avail - tbin->ncached) = ptr;
assert(bin->ncached < bin_info->ncached_max);
bin->ncached++;
*(bin->avail - bin->ncached) = ptr;
tcache_event(tsd, tcache);
}

79
include/jemalloc/internal/tcache_structs.h
View File

@ -3,54 +3,51 @@
#include "jemalloc/internal/ql.h"
#include "jemalloc/internal/size_classes.h"
#include "jemalloc/internal/stats_tsd.h"
#include "jemalloc/internal/cache_bin.h"
#include "jemalloc/internal/ticker.h"
/*
* Read-only information associated with each element of tcache_t's tbins array
* is stored separately, mainly to reduce memory usage.
*/
struct tcache_bin_info_s {
unsigned ncached_max; /* Upper limit on ncached. */
};
struct tcache_bin_s {
low_water_t low_water; /* Min # cached since last GC. */
uint32_t ncached; /* # of cached objects. */
/*
* ncached and stats are both modified frequently. Let's keep them
* close so that they have a higher chance of being on the same
* cacheline, thus less write-backs.
*/
tcache_bin_stats_t tstats;
/*
* To make use of adjacent cacheline prefetch, the items in the avail
* stack goes to higher address for newer allocations. avail points
* just above the available space, which means that
* avail[-ncached, ... -1] are available items and the lowest item will
* be allocated first.
*/
void **avail; /* Stack of available objects. */
};
struct tcache_s {
/* Data accessed frequently first: prof, ticker and small bins. */
uint64_t prof_accumbytes;/* Cleared after arena_prof_accum(). */
ticker_t gc_ticker; /* Drives incremental GC. */
/*
* The pointer stacks associated with tbins follow as a contiguous
* array. During tcache initialization, the avail pointer in each
* element of tbins is initialized to point to the proper offset within
* this array.
* To minimize our cache-footprint, we put the frequently accessed data
* together at the start of this struct.
*/
tcache_bin_t tbins_small[NBINS];
/* Data accessed less often below. */
ql_elm(tcache_t) link; /* Used for aggregating stats. */
arena_t *arena; /* Associated arena. */
szind_t next_gc_bin; /* Next bin to GC. */
/* Cleared after arena_prof_accum(). */
uint64_t prof_accumbytes;
/* Drives incremental GC. */
ticker_t gc_ticker;
/*
* The pointer stacks associated with bins follow as a contiguous array.
* During tcache initialization, the avail pointer in each element of
* tbins is initialized to point to the proper offset within this array.
*/
cache_bin_t bins_small[NBINS];
/*
* This data is less hot; we can be a little less careful with our
* footprint here.
*/
/* Lets us track all the tcaches in an arena. */
ql_elm(tcache_t) link;
/*
* The descriptor lets the arena find our cache bins without seeing the
* tcache definition. This enables arenas to aggregate stats across
* tcaches without having a tcache dependency.
*/
cache_bin_array_descriptor_t cache_bin_array_descriptor;
/* The arena this tcache is associated with. */
arena_t *arena;
/* Next bin to GC. */
szind_t next_gc_bin;
/* For small bins, fill (ncached_max >> lg_fill_div). */
uint8_t lg_fill_div[NBINS];
tcache_bin_t tbins_large[NSIZES-NBINS];
/*
* We put the cache bins for large size classes at the end of the
* struct, since some of them might not get used. This might end up
* letting us avoid touching an extra page if we don't have to.
*/
cache_bin_t bins_large[NSIZES-NBINS];
};
/* Linkage for list of available (previously used) explicit tcache IDs. */

5
include/jemalloc/internal/tcache_types.h
View File

@ -3,14 +3,9 @@
#include "jemalloc/internal/size_classes.h"
typedef struct tcache_bin_info_s tcache_bin_info_t;
typedef struct tcache_bin_s tcache_bin_t;
typedef struct tcache_s tcache_t;
typedef struct tcaches_s tcaches_t;
/* ncached is cast to this type for comparison. */
typedef int32_t low_water_t;
/*
* tcache pointers close to NULL are used to encode state information that is
* used for two purposes: preventing thread caching on a per thread basis and

38
include/jemalloc/internal/ticker.h
View File

@ -32,14 +32,42 @@ ticker_read(const ticker_t *ticker) {
return ticker->tick;
}
static inline bool
ticker_ticks(ticker_t *ticker, int32_t nticks) {
if (unlikely(ticker->tick < nticks)) {
/*
* Not intended to be a public API. Unfortunately, on x86, neither gcc nor
* clang seems smart enough to turn
* ticker->tick -= nticks;
* if (unlikely(ticker->tick < 0)) {
* fixup ticker
* return true;
* }
* return false;
* into
* subq %nticks_reg, (%ticker_reg)
* js fixup ticker
*
* unless we force "fixup ticker" out of line. In that case, gcc gets it right,
* but clang now does worse than before. So, on x86 with gcc, we force it out
* of line, but otherwise let the inlining occur. Ordinarily this wouldn't be
* worth the hassle, but this is on the fast path of both malloc and free (via
* tcache_event).
*/
#if defined(__GNUC__) && !defined(__clang__) \
&& (defined(__x86_64__) || defined(__i386__))
JEMALLOC_NOINLINE
#endif
static bool
ticker_fixup(ticker_t *ticker) {
ticker->tick = ticker->nticks;
return true;
}
}
static inline bool
ticker_ticks(ticker_t *ticker, int32_t nticks) {
ticker->tick -= nticks;
return(false);
if (unlikely(ticker->tick < 0)) {
return ticker_fixup(ticker);
}
return false;
}
static inline bool

2
include/jemalloc/internal/tsd.h
View File

@ -65,6 +65,7 @@ typedef void (*test_callback_t)(int *);
O(arenas_tdata_bypass, bool, bool) \
O(reentrancy_level, int8_t, int8_t) \
O(narenas_tdata, uint32_t, uint32_t) \
O(offset_state, uint64_t, uint64_t) \
O(thread_allocated, uint64_t, uint64_t) \
O(thread_deallocated, uint64_t, uint64_t) \
O(prof_tdata, prof_tdata_t *, prof_tdata_t *) \
@ -84,6 +85,7 @@ typedef void (*test_callback_t)(int *);
0, \
0, \
0, \
0, \
NULL, \
RTREE_CTX_ZERO_INITIALIZER, \
NULL, \

2
include/jemalloc/internal/tsd_tls.h
View File

@ -39,7 +39,7 @@ tsd_get_allocates(void) {
/* Get/set. */
JEMALLOC_ALWAYS_INLINE tsd_t *
tsd_get(bool init) {
tsd_get(UNUSED bool init) {
assert(tsd_booted);
return &tsd_tls;
}

2
include/jemalloc/internal/witness.h
View File

@ -51,7 +51,7 @@
#define WITNESS_RANK_ARENA_LARGE 19U
#define WITNESS_RANK_LEAF 0xffffffffU
#define WITNESS_RANK_ARENA_BIN WITNESS_RANK_LEAF
#define WITNESS_RANK_BIN WITNESS_RANK_LEAF
#define WITNESS_RANK_ARENA_STATS WITNESS_RANK_LEAF
#define WITNESS_RANK_DSS WITNESS_RANK_LEAF
#define WITNESS_RANK_PROF_ACTIVE WITNESS_RANK_LEAF

2
include/jemalloc/jemalloc_mangle.sh
View File

@ -1,4 +1,4 @@
#!/bin/sh
#!/bin/sh -eu
public_symbols_txt=$1
symbol_prefix=$2

2
jemalloc.pc.in
View File

@ -7,6 +7,6 @@ install_suffix=@install_suffix@
Name: jemalloc
Description: A general purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support.
URL: http://jemalloc.net/
Version: @jemalloc_version@
Version: @jemalloc_version_major@.@jemalloc_version_minor@.@jemalloc_version_bugfix@_@jemalloc_version_nrev@
Cflags: -I${includedir}
Libs: -L${libdir} -ljemalloc${install_suffix}

7
msvc/ReadMe.txt
View File

@ -9,16 +9,15 @@ How to build jemalloc for Windows
* grep
* sed
2. Install Visual Studio 2015 with Visual C++
2. Install Visual Studio 2015 or 2017 with Visual C++
3. Add Cygwin\bin to the PATH environment variable
4. Open "VS2015 x86 Native Tools Command Prompt"
4. Open "x64 Native Tools Command Prompt for VS 2017"
(note: x86/x64 doesn't matter at this point)
5. Generate header files:
sh -c "CC=cl ./autogen.sh"
6. Now the project can be opened and built in Visual Studio:
msvc\jemalloc_vc2015.sln
msvc\jemalloc_vc2017.sln

63
msvc/jemalloc_vc2017.sln Normal file
View File

@ -0,0 +1,63 @@

Microsoft Visual Studio Solution File, Format Version 12.00
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VisualStudioVersion = 14.0.24720.0
MinimumVisualStudioVersion = 10.0.40219.1
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ReadMe.txt = ReadMe.txt
EndProjectSection
EndProject
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EndProject
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EndProject
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12
msvc/projects/vc2015/jemalloc/jemalloc.vcxproj
View File

@ -38,9 +38,11 @@
<ClCompile Include="..\..\..\..\src\arena.c" />
<ClCompile Include="..\..\..\..\src\background_thread.c" />
<ClCompile Include="..\..\..\..\src\base.c" />
<ClCompile Include="..\..\..\..\src\bin.c" />
<ClCompile Include="..\..\..\..\src\bitmap.c" />
<ClCompile Include="..\..\..\..\src\ckh.c" />
<ClCompile Include="..\..\..\..\src\ctl.c" />
<ClCompile Include="..\..\..\..\src\div.c" />
<ClCompile Include="..\..\..\..\src\extent.c" />
<ClCompile Include="..\..\..\..\src\extent_dss.c" />
<ClCompile Include="..\..\..\..\src\extent_mmap.c" />
@ -48,6 +50,7 @@
<ClCompile Include="..\..\..\..\src\hooks.c" />
<ClCompile Include="..\..\..\..\src\jemalloc.c" />
<ClCompile Include="..\..\..\..\src\large.c" />
<ClCompile Include="..\..\..\..\src\log.c" />
<ClCompile Include="..\..\..\..\src\malloc_io.c" />
<ClCompile Include="..\..\..\..\src\mutex.c" />
<ClCompile Include="..\..\..\..\src\mutex_pool.c" />
@ -56,7 +59,6 @@
<ClCompile Include="..\..\..\..\src\prng.c" />
<ClCompile Include="..\..\..\..\src\prof.c" />
<ClCompile Include="..\..\..\..\src\rtree.c" />
<ClCompile Include="..\..\..\..\src\spin.c" />
<ClCompile Include="..\..\..\..\src\stats.c" />
<ClCompile Include="..\..\..\..\src\sz.c" />
<ClCompile Include="..\..\..\..\src\tcache.c" />
@ -197,7 +199,7 @@
</PrecompiledHeader>
<WarningLevel>Level3</WarningLevel>
<Optimization>Disabled</Optimization>
<PreprocessorDefinitions>_REENTRANT;_WINDLL;DLLEXPORT;JEMALLOC_DEBUG;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions>JEMALLOC_NO_PRIVATE_NAMESPACE;_REENTRANT;_WINDLL;DLLEXPORT;JEMALLOC_DEBUG;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<AdditionalIncludeDirectories>..\..\..\..\include;..\..\..\..\include\msvc_compat;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<DisableSpecificWarnings>4090;4146;4267;4334</DisableSpecificWarnings>
<ProgramDataBaseFileName>$(OutputPath)$(TargetName).pdb</ProgramDataBaseFileName>
@ -213,7 +215,7 @@
</PrecompiledHeader>
<WarningLevel>Level3</WarningLevel>
<Optimization>Disabled</Optimization>
<PreprocessorDefinitions>JEMALLOC_DEBUG;_REENTRANT;JEMALLOC_EXPORT=;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions>JEMALLOC_NO_PRIVATE_NAMESPACE;JEMALLOC_DEBUG;_REENTRANT;JEMALLOC_EXPORT=;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<AdditionalIncludeDirectories>..\..\..\..\include;..\..\..\..\include\msvc_compat;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
<DisableSpecificWarnings>4090;4146;4267;4334</DisableSpecificWarnings>
@ -266,7 +268,7 @@
<Optimization>MaxSpeed</Optimization>
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<PreprocessorDefinitions>_REENTRANT;_WINDLL;DLLEXPORT;NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions>JEMALLOC_NO_PRIVATE_NAMESPACE;_REENTRANT;_WINDLL;DLLEXPORT;NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<AdditionalIncludeDirectories>..\..\..\..\include;..\..\..\..\include\msvc_compat;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<DisableSpecificWarnings>4090;4146;4267;4334</DisableSpecificWarnings>
<ProgramDataBaseFileName>$(OutputPath)$(TargetName).pdb</ProgramDataBaseFileName>
@ -286,7 +288,7 @@
<Optimization>MaxSpeed</Optimization>
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<PreprocessorDefinitions>_REENTRANT;JEMALLOC_EXPORT=;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions>JEMALLOC_NO_PRIVATE_NAMESPACE;_REENTRANT;JEMALLOC_EXPORT=;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<AdditionalIncludeDirectories>..\..\..\..\include;..\..\..\..\include\msvc_compat;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<RuntimeLibrary>MultiThreaded</RuntimeLibrary>
<DisableSpecificWarnings>4090;4146;4267;4334</DisableSpecificWarnings>

12
msvc/projects/vc2015/jemalloc/jemalloc.vcxproj.filters
View File

@ -70,9 +70,6 @@
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<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\src\spin.c">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\src\stats.c">
<Filter>Source Files</Filter>
</ClCompile>
@ -91,5 +88,14 @@
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<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\src\log.c">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\src\bin.c">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\..\..\..\src\div.c">
<Filter>Source Files</Filter>
</ClCompile>
</ItemGroup>
</Project>

6
msvc/projects/vc2015/test_threads/test_threads.vcxproj
View File

@ -310,8 +310,8 @@
</Link>
</ItemDefinitionGroup>
<ItemGroup>
<ClCompile Include="test_threads.cpp" />
<ClCompile Include="test_threads_main.cpp" />
<ClCompile Include="..\..\..\test_threads\test_threads.cpp" />
<ClCompile Include="..\..\..\test_threads\test_threads_main.cpp" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\jemalloc\jemalloc.vcxproj">
@ -319,7 +319,7 @@
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<ItemGroup>
<ClInclude Include="test_threads.h" />
<ClInclude Include="..\..\..\test_threads\test_threads.h" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
<ImportGroup Label="ExtensionTargets">

6
msvc/projects/vc2015/test_threads/test_threads.vcxproj.filters
View File

@ -11,15 +11,15 @@
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<Filter>Source Files</Filter>
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<ClInclude Include="..\..\..\test_threads\test_threads.h">
<Filter>Header Files</Filter>
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347
msvc/projects/vc2017/jemalloc/jemalloc.vcxproj Normal file
View File

@ -0,0 +1,347 @@
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<UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
<Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
</Filter>
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\..\..\test_threads\test_threads.cpp">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\..\..\test_threads\test_threads_main.cpp">
<Filter>Source Files</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\..\test_threads\test_threads.h">
<Filter>Header Files</Filter>
</ClInclude>
</ItemGroup>
</Project>

0
msvc/projects/vc2015/test_threads/test_threads.cpp → msvc/test_threads/test_threads.cpp
View File

0
msvc/projects/vc2015/test_threads/test_threads.h → msvc/test_threads/test_threads.h
View File

0
msvc/projects/vc2015/test_threads/test_threads_main.cpp → msvc/test_threads/test_threads_main.cpp
View File

14
scripts/gen_run_tests.py
View File

@ -1,9 +1,14 @@
#!/usr/bin/env python
import sys
from itertools import combinations
from os import uname
from multiprocessing import cpu_count
# Later, we want to test extended vaddr support. Apparently, the "real" way of
# checking this is flaky on OS X.
bits_64 = sys.maxsize > 2**32
nparallel = cpu_count() * 2
uname = uname()[0]
@ -22,8 +27,10 @@ possible_config_opts = [
'--enable-debug',
'--enable-prof',
'--disable-stats',
'--with-malloc-conf=tcache:false',
]
if bits_64:
possible_config_opts.append('--with-lg-vaddr=56')
possible_malloc_conf_opts = [
'tcache:false',
'dss:primary',
@ -57,6 +64,11 @@ for cc, cxx in possible_compilers:
else '')
)
# We don't want to test large vaddr spaces in 32-bit mode.
if ('-m32' in compiler_opts and '--with-lg-vaddr=56' in
config_opts):
continue
# Per CPU arenas are only supported on Linux.
linux_supported = ('percpu_arena:percpu' in malloc_conf_opts \
or 'background_thread:true' in malloc_conf_opts)

406
src/arena.c
View File

@ -3,6 +3,7 @@
#include "jemalloc/internal/jemalloc_internal_includes.h"
#include "jemalloc/internal/assert.h"
#include "jemalloc/internal/div.h"
#include "jemalloc/internal/extent_dss.h"
#include "jemalloc/internal/extent_mmap.h"
#include "jemalloc/internal/mutex.h"
@ -32,21 +33,6 @@ ssize_t opt_muzzy_decay_ms = MUZZY_DECAY_MS_DEFAULT;
static atomic_zd_t dirty_decay_ms_default;
static atomic_zd_t muzzy_decay_ms_default;
const arena_bin_info_t arena_bin_info[NBINS] = {
#define BIN_INFO_bin_yes(reg_size, slab_size, nregs) \
{reg_size, slab_size, nregs, BITMAP_INFO_INITIALIZER(nregs)},
#define BIN_INFO_bin_no(reg_size, slab_size, nregs)
#define SC(index, lg_grp, lg_delta, ndelta, psz, bin, pgs, \
lg_delta_lookup) \
BIN_INFO_bin_##bin((1U<<lg_grp) + (ndelta<<lg_delta), \
(pgs << LG_PAGE), (pgs << LG_PAGE) / ((1U<<lg_grp) + \
(ndelta<<lg_delta)))
SIZE_CLASSES
#undef BIN_INFO_bin_yes
#undef BIN_INFO_bin_no
#undef SC
};
const uint64_t h_steps[SMOOTHSTEP_NSTEPS] = {
#define STEP(step, h, x, y) \
h,
@ -54,6 +40,8 @@ const uint64_t h_steps[SMOOTHSTEP_NSTEPS] = {
#undef STEP
};
static div_info_t arena_binind_div_info[NBINS];
/******************************************************************************/
/*
* Function prototypes for static functions that are referenced prior to
@ -62,157 +50,18 @@ const uint64_t h_steps[SMOOTHSTEP_NSTEPS] = {
static void arena_decay_to_limit(tsdn_t *tsdn, arena_t *arena,
arena_decay_t *decay, extents_t *extents, bool all, size_t npages_limit,
bool is_background_thread);
size_t npages_decay_max, bool is_background_thread);
static bool arena_decay_dirty(tsdn_t *tsdn, arena_t *arena,
bool is_background_thread, bool all);
static void arena_dalloc_bin_slab(tsdn_t *tsdn, arena_t *arena, extent_t *slab,
arena_bin_t *bin);
bin_t *bin);
static void arena_bin_lower_slab(tsdn_t *tsdn, arena_t *arena, extent_t *slab,
arena_bin_t *bin);
bin_t *bin);
/******************************************************************************/
static bool
arena_stats_init(tsdn_t *tsdn, arena_stats_t *arena_stats) {
if (config_debug) {
for (size_t i = 0; i < sizeof(arena_stats_t); i++) {
assert(((char *)arena_stats)[i] == 0);
}
}
#ifndef JEMALLOC_ATOMIC_U64
if (malloc_mutex_init(&arena_stats->mtx, "arena_stats",
WITNESS_RANK_ARENA_STATS, malloc_mutex_rank_exclusive)) {
return true;
}
#endif
/* Memory is zeroed, so there is no need to clear stats. */
return false;
}
static void
arena_stats_lock(tsdn_t *tsdn, arena_stats_t *arena_stats) {
#ifndef JEMALLOC_ATOMIC_U64
malloc_mutex_lock(tsdn, &arena_stats->mtx);
#endif
}
static void
arena_stats_unlock(tsdn_t *tsdn, arena_stats_t *arena_stats) {
#ifndef JEMALLOC_ATOMIC_U64
malloc_mutex_unlock(tsdn, &arena_stats->mtx);
#endif
}
static uint64_t
arena_stats_read_u64(tsdn_t *tsdn, arena_stats_t *arena_stats,
arena_stats_u64_t *p) {
#ifdef JEMALLOC_ATOMIC_U64
return atomic_load_u64(p, ATOMIC_RELAXED);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
return *p;
#endif
}
static void
arena_stats_add_u64(tsdn_t *tsdn, arena_stats_t *arena_stats,
arena_stats_u64_t *p, uint64_t x) {
#ifdef JEMALLOC_ATOMIC_U64
atomic_fetch_add_u64(p, x, ATOMIC_RELAXED);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
*p += x;
#endif
}
UNUSED static void
arena_stats_sub_u64(tsdn_t *tsdn, arena_stats_t *arena_stats,
arena_stats_u64_t *p, uint64_t x) {
#ifdef JEMALLOC_ATOMIC_U64
UNUSED uint64_t r = atomic_fetch_sub_u64(p, x, ATOMIC_RELAXED);
assert(r - x <= r);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
*p -= x;
assert(*p + x >= *p);
#endif
}
/*
* Non-atomically sets *dst += src. *dst needs external synchronization.
* This lets us avoid the cost of a fetch_add when its unnecessary (note that
* the types here are atomic).
*/
static void
arena_stats_accum_u64(arena_stats_u64_t *dst, uint64_t src) {
#ifdef JEMALLOC_ATOMIC_U64
uint64_t cur_dst = atomic_load_u64(dst, ATOMIC_RELAXED);
atomic_store_u64(dst, src + cur_dst, ATOMIC_RELAXED);
#else
*dst += src;
#endif
}
static size_t
arena_stats_read_zu(tsdn_t *tsdn, arena_stats_t *arena_stats, atomic_zu_t *p) {
#ifdef JEMALLOC_ATOMIC_U64
return atomic_load_zu(p, ATOMIC_RELAXED);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
return atomic_load_zu(p, ATOMIC_RELAXED);
#endif
}
static void
arena_stats_add_zu(tsdn_t *tsdn, arena_stats_t *arena_stats, atomic_zu_t *p,
size_t x) {
#ifdef JEMALLOC_ATOMIC_U64
atomic_fetch_add_zu(p, x, ATOMIC_RELAXED);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
size_t cur = atomic_load_zu(p, ATOMIC_RELAXED);
atomic_store_zu(p, cur + x, ATOMIC_RELAXED);
#endif
}
static void
arena_stats_sub_zu(tsdn_t *tsdn, arena_stats_t *arena_stats, atomic_zu_t *p,
size_t x) {
#ifdef JEMALLOC_ATOMIC_U64
UNUSED size_t r = atomic_fetch_sub_zu(p, x, ATOMIC_RELAXED);
assert(r - x <= r);
#else
malloc_mutex_assert_owner(tsdn, &arena_stats->mtx);
size_t cur = atomic_load_zu(p, ATOMIC_RELAXED);
atomic_store_zu(p, cur - x, ATOMIC_RELAXED);
#endif
}
/* Like the _u64 variant, needs an externally synchronized *dst. */
static void
arena_stats_accum_zu(atomic_zu_t *dst, size_t src) {
size_t cur_dst = atomic_load_zu(dst, ATOMIC_RELAXED);
atomic_store_zu(dst, src + cur_dst, ATOMIC_RELAXED);
}
void
arena_stats_large_nrequests_add(tsdn_t *tsdn, arena_stats_t *arena_stats,
szind_t szind, uint64_t nrequests) {
arena_stats_lock(tsdn, arena_stats);
arena_stats_add_u64(tsdn, arena_stats, &arena_stats->lstats[szind -
NBINS].nrequests, nrequests);
arena_stats_unlock(tsdn, arena_stats);
}
void
arena_stats_mapped_add(tsdn_t *tsdn, arena_stats_t *arena_stats, size_t size) {
arena_stats_lock(tsdn, arena_stats);
arena_stats_add_zu(tsdn, arena_stats, &arena_stats->mapped, size);
arena_stats_unlock(tsdn, arena_stats);
}
void
arena_basic_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads,
arena_basic_stats_merge(UNUSED tsdn_t *tsdn, arena_t *arena, unsigned *nthreads,
const char **dss, ssize_t *dirty_decay_ms, ssize_t *muzzy_decay_ms,
size_t *nactive, size_t *ndirty, size_t *nmuzzy) {
*nthreads += arena_nthreads_get(arena, false);
@ -228,15 +77,15 @@ void
arena_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads,
const char **dss, ssize_t *dirty_decay_ms, ssize_t *muzzy_decay_ms,
size_t *nactive, size_t *ndirty, size_t *nmuzzy, arena_stats_t *astats,
malloc_bin_stats_t *bstats, malloc_large_stats_t *lstats) {
bin_stats_t *bstats, arena_stats_large_t *lstats) {
cassert(config_stats);
arena_basic_stats_merge(tsdn, arena, nthreads, dss, dirty_decay_ms,
muzzy_decay_ms, nactive, ndirty, nmuzzy);
size_t base_allocated, base_resident, base_mapped;
size_t base_allocated, base_resident, base_mapped, metadata_thp;
base_stats_get(tsdn, arena->base, &base_allocated, &base_resident,
&base_mapped);
&base_mapped, &metadata_thp);
arena_stats_lock(tsdn, &arena->stats);
@ -267,6 +116,7 @@ arena_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads,
arena_stats_accum_zu(&astats->base, base_allocated);
arena_stats_accum_zu(&astats->internal, arena_internal_get(arena));
arena_stats_accum_zu(&astats->metadata_thp, metadata_thp);
arena_stats_accum_zu(&astats->resident, base_resident +
(((atomic_load_zu(&arena->nactive, ATOMIC_RELAXED) +
extents_npages_get(&arena->extents_dirty) +
@ -303,16 +153,16 @@ arena_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads,
/* tcache_bytes counts currently cached bytes. */
atomic_store_zu(&astats->tcache_bytes, 0, ATOMIC_RELAXED);
malloc_mutex_lock(tsdn, &arena->tcache_ql_mtx);
tcache_t *tcache;
ql_foreach(tcache, &arena->tcache_ql, link) {
cache_bin_array_descriptor_t *descriptor;
ql_foreach(descriptor, &arena->cache_bin_array_descriptor_ql, link) {
szind_t i = 0;
for (; i < NBINS; i++) {
tcache_bin_t *tbin = tcache_small_bin_get(tcache, i);
cache_bin_t *tbin = &descriptor->bins_small[i];
arena_stats_accum_zu(&astats->tcache_bytes,
tbin->ncached * sz_index2size(i));
}
for (; i < nhbins; i++) {
tcache_bin_t *tbin = tcache_large_bin_get(tcache, i);
cache_bin_t *tbin = &descriptor->bins_large[i];
arena_stats_accum_zu(&astats->tcache_bytes,
tbin->ncached * sz_index2size(i));
}
@ -351,20 +201,7 @@ arena_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads,
nstime_subtract(&astats->uptime, &arena->create_time);
for (szind_t i = 0; i < NBINS; i++) {
arena_bin_t *bin = &arena->bins[i];
malloc_mutex_lock(tsdn, &bin->lock);
malloc_mutex_prof_read(tsdn, &bstats[i].mutex_data, &bin->lock);
bstats[i].nmalloc += bin->stats.nmalloc;
bstats[i].ndalloc += bin->stats.ndalloc;
bstats[i].nrequests += bin->stats.nrequests;
bstats[i].curregs += bin->stats.curregs;
bstats[i].nfills += bin->stats.nfills;
bstats[i].nflushes += bin->stats.nflushes;
bstats[i].nslabs += bin->stats.nslabs;
bstats[i].reslabs += bin->stats.reslabs;
bstats[i].curslabs += bin->stats.curslabs;
malloc_mutex_unlock(tsdn, &bin->lock);
bin_stats_merge(tsdn, &bstats[i], &arena->bins[i]);
}
}
@ -384,8 +221,7 @@ arena_extents_dirty_dalloc(tsdn_t *tsdn, arena_t *arena,
}
static void *
arena_slab_reg_alloc(tsdn_t *tsdn, extent_t *slab,
const arena_bin_info_t *bin_info) {
arena_slab_reg_alloc(extent_t *slab, const bin_info_t *bin_info) {
void *ret;
arena_slab_data_t *slab_data = extent_slab_data_get(slab);
size_t regind;
@ -412,37 +248,22 @@ arena_slab_regind(extent_t *slab, szind_t binind, const void *ptr) {
assert((uintptr_t)ptr < (uintptr_t)extent_past_get(slab));
/* Freeing an interior pointer can cause assertion failure. */
assert(((uintptr_t)ptr - (uintptr_t)extent_addr_get(slab)) %
(uintptr_t)arena_bin_info[binind].reg_size == 0);
(uintptr_t)bin_infos[binind].reg_size == 0);
diff = (size_t)((uintptr_t)ptr - (uintptr_t)extent_addr_get(slab));
/* Avoid doing division with a variable divisor. */
diff = (size_t)((uintptr_t)ptr - (uintptr_t)extent_addr_get(slab));
switch (binind) {
#define REGIND_bin_yes(index, reg_size) \
case index: \
regind = diff / (reg_size); \
assert(diff == regind * (reg_size)); \
break;
#define REGIND_bin_no(index, reg_size)
#define SC(index, lg_grp, lg_delta, ndelta, psz, bin, pgs, \
lg_delta_lookup) \
REGIND_bin_##bin(index, (1U<<lg_grp) + (ndelta<<lg_delta))
SIZE_CLASSES
#undef REGIND_bin_yes
#undef REGIND_bin_no
#undef SC
default: not_reached();
}
regind = div_compute(&arena_binind_div_info[binind], diff);
assert(regind < arena_bin_info[binind].nregs);
assert(regind < bin_infos[binind].nregs);
return regind;
}
static void
arena_slab_reg_dalloc(tsdn_t *tsdn, extent_t *slab,
arena_slab_data_t *slab_data, void *ptr) {
arena_slab_reg_dalloc(extent_t *slab, arena_slab_data_t *slab_data, void *ptr) {
szind_t binind = extent_szind_get(slab);
const arena_bin_info_t *bin_info = &arena_bin_info[binind];
const bin_info_t *bin_info = &bin_infos[binind];
size_t regind = arena_slab_regind(slab, binind, ptr);
assert(extent_nfree_get(slab) < bin_info->nregs);
@ -692,7 +513,8 @@ arena_decay_try_purge(tsdn_t *tsdn, arena_t *arena, arena_decay_t *decay,
bool is_background_thread) {
if (current_npages > npages_limit) {
arena_decay_to_limit(tsdn, arena, decay, extents, false,
npages_limit, is_background_thread);
npages_limit, current_npages - npages_limit,
is_background_thread);
}
}
@ -738,7 +560,7 @@ arena_decay_epoch_advance(tsdn_t *tsdn, arena_t *arena, arena_decay_t *decay,
}
static void
arena_decay_reinit(arena_decay_t *decay, extents_t *extents, ssize_t decay_ms) {
arena_decay_reinit(arena_decay_t *decay, ssize_t decay_ms) {
arena_decay_ms_write(decay, decay_ms);
if (decay_ms > 0) {
nstime_init(&decay->interval, (uint64_t)decay_ms *
@ -755,8 +577,8 @@ arena_decay_reinit(arena_decay_t *decay, extents_t *extents, ssize_t decay_ms) {
}
static bool
arena_decay_init(arena_decay_t *decay, extents_t *extents, ssize_t decay_ms,
decay_stats_t *stats) {
arena_decay_init(arena_decay_t *decay, ssize_t decay_ms,
arena_stats_decay_t *stats) {
if (config_debug) {
for (size_t i = 0; i < sizeof(arena_decay_t); i++) {
assert(((char *)decay)[i] == 0);
@ -768,7 +590,7 @@ arena_decay_init(arena_decay_t *decay, extents_t *extents, ssize_t decay_ms,
return true;
}
decay->purging = false;
arena_decay_reinit(decay, extents, decay_ms);
arena_decay_reinit(decay, decay_ms);
/* Memory is zeroed, so there is no need to clear stats. */
if (config_stats) {
decay->stats = stats;
@ -798,7 +620,8 @@ arena_maybe_decay(tsdn_t *tsdn, arena_t *arena, arena_decay_t *decay,
if (decay_ms <= 0) {
if (decay_ms == 0) {
arena_decay_to_limit(tsdn, arena, decay, extents, false,
0, is_background_thread);
0, extents_npages_get(extents),
is_background_thread);
}
return false;
}
@ -876,7 +699,7 @@ arena_decay_ms_set(tsdn_t *tsdn, arena_t *arena, arena_decay_t *decay,
* infrequent, either between the {-1, 0, >0} states, or a one-time
* arbitrary change during initial arena configuration.
*/
arena_decay_reinit(decay, extents, decay_ms);
arena_decay_reinit(decay, decay_ms);
arena_maybe_decay(tsdn, arena, decay, extents, false);
malloc_mutex_unlock(tsdn, &decay->mtx);
@ -900,14 +723,15 @@ arena_muzzy_decay_ms_set(tsdn_t *tsdn, arena_t *arena,
static size_t
arena_stash_decayed(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, extents_t *extents, size_t npages_limit,
extent_list_t *decay_extents) {
size_t npages_decay_max, extent_list_t *decay_extents) {
witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
WITNESS_RANK_CORE, 0);
/* Stash extents according to npages_limit. */
size_t nstashed = 0;
extent_t *extent;
while ((extent = extents_evict(tsdn, arena, r_extent_hooks, extents,
while (nstashed < npages_decay_max &&
(extent = extents_evict(tsdn, arena, r_extent_hooks, extents,
npages_limit)) != NULL) {
extent_list_append(decay_extents, extent);
nstashed += extent_size_get(extent) >> LG_PAGE;
@ -982,12 +806,15 @@ arena_decay_stashed(tsdn_t *tsdn, arena_t *arena,
}
/*
* npages_limit: Decay as many dirty extents as possible without violating the
* invariant: (extents_npages_get(extents) >= npages_limit)
* npages_limit: Decay at most npages_decay_max pages without violating the
* invariant: (extents_npages_get(extents) >= npages_limit). We need an upper
* bound on number of pages in order to prevent unbounded growth (namely in
* stashed), otherwise unbounded new pages could be added to extents during the
* current decay run, so that the purging thread never finishes.
*/
static void
arena_decay_to_limit(tsdn_t *tsdn, arena_t *arena, arena_decay_t *decay,
extents_t *extents, bool all, size_t npages_limit,
extents_t *extents, bool all, size_t npages_limit, size_t npages_decay_max,
bool is_background_thread) {
witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
WITNESS_RANK_CORE, 1);
@ -1005,7 +832,7 @@ arena_decay_to_limit(tsdn_t *tsdn, arena_t *arena, arena_decay_t *decay,
extent_list_init(&decay_extents);
size_t npurge = arena_stash_decayed(tsdn, arena, &extent_hooks, extents,
npages_limit, &decay_extents);
npages_limit, npages_decay_max, &decay_extents);
if (npurge != 0) {
UNUSED size_t npurged = arena_decay_stashed(tsdn, arena,
&extent_hooks, decay, extents, all, &decay_extents,
@ -1023,7 +850,7 @@ arena_decay_impl(tsdn_t *tsdn, arena_t *arena, arena_decay_t *decay,
if (all) {
malloc_mutex_lock(tsdn, &decay->mtx);
arena_decay_to_limit(tsdn, arena, decay, extents, all, 0,
is_background_thread);
extents_npages_get(extents), is_background_thread);
malloc_mutex_unlock(tsdn, &decay->mtx);
return false;
@ -1036,7 +863,7 @@ arena_decay_impl(tsdn_t *tsdn, arena_t *arena, arena_decay_t *decay,
bool epoch_advanced = arena_maybe_decay(tsdn, arena, decay, extents,
is_background_thread);
size_t npages_new;
UNUSED size_t npages_new;
if (epoch_advanced) {
/* Backlog is updated on epoch advance. */
npages_new = decay->backlog[SMOOTHSTEP_NSTEPS-1];
@ -1045,7 +872,8 @@ arena_decay_impl(tsdn_t *tsdn, arena_t *arena, arena_decay_t *decay,
if (have_background_thread && background_thread_enabled() &&
epoch_advanced && !is_background_thread) {
background_thread_interval_check(tsdn, arena, decay, npages_new);
background_thread_interval_check(tsdn, arena, decay,
npages_new);
}
return false;
@ -1082,18 +910,18 @@ arena_slab_dalloc(tsdn_t *tsdn, arena_t *arena, extent_t *slab) {
}
static void
arena_bin_slabs_nonfull_insert(arena_bin_t *bin, extent_t *slab) {
arena_bin_slabs_nonfull_insert(bin_t *bin, extent_t *slab) {
assert(extent_nfree_get(slab) > 0);
extent_heap_insert(&bin->slabs_nonfull, slab);
}
static void
arena_bin_slabs_nonfull_remove(arena_bin_t *bin, extent_t *slab) {
arena_bin_slabs_nonfull_remove(bin_t *bin, extent_t *slab) {
extent_heap_remove(&bin->slabs_nonfull, slab);
}
static extent_t *
arena_bin_slabs_nonfull_tryget(arena_bin_t *bin) {
arena_bin_slabs_nonfull_tryget(bin_t *bin) {
extent_t *slab = extent_heap_remove_first(&bin->slabs_nonfull);
if (slab == NULL) {
return NULL;
@ -1105,7 +933,7 @@ arena_bin_slabs_nonfull_tryget(arena_bin_t *bin) {
}
static void
arena_bin_slabs_full_insert(arena_t *arena, arena_bin_t *bin, extent_t *slab) {
arena_bin_slabs_full_insert(arena_t *arena, bin_t *bin, extent_t *slab) {
assert(extent_nfree_get(slab) == 0);
/*
* Tracking extents is required by arena_reset, which is not allowed
@ -1119,7 +947,7 @@ arena_bin_slabs_full_insert(arena_t *arena, arena_bin_t *bin, extent_t *slab) {
}
static void
arena_bin_slabs_full_remove(arena_t *arena, arena_bin_t *bin, extent_t *slab) {
arena_bin_slabs_full_remove(arena_t *arena, bin_t *bin, extent_t *slab) {
if (arena_is_auto(arena)) {
return;
}
@ -1173,7 +1001,7 @@ arena_reset(tsd_t *tsd, arena_t *arena) {
/* Bins. */
for (unsigned i = 0; i < NBINS; i++) {
extent_t *slab;
arena_bin_t *bin = &arena->bins[i];
bin_t *bin = &arena->bins[i];
malloc_mutex_lock(tsd_tsdn(tsd), &bin->lock);
if (bin->slabcur != NULL) {
slab = bin->slabcur;
@ -1262,7 +1090,7 @@ arena_destroy(tsd_t *tsd, arena_t *arena) {
static extent_t *
arena_slab_alloc_hard(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, const arena_bin_info_t *bin_info,
extent_hooks_t **r_extent_hooks, const bin_info_t *bin_info,
szind_t szind) {
extent_t *slab;
bool zero, commit;
@ -1285,7 +1113,7 @@ arena_slab_alloc_hard(tsdn_t *tsdn, arena_t *arena,
static extent_t *
arena_slab_alloc(tsdn_t *tsdn, arena_t *arena, szind_t binind,
const arena_bin_info_t *bin_info) {
const bin_info_t *bin_info) {
witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
WITNESS_RANK_CORE, 0);
@ -1321,10 +1149,10 @@ arena_slab_alloc(tsdn_t *tsdn, arena_t *arena, szind_t binind,
}
static extent_t *
arena_bin_nonfull_slab_get(tsdn_t *tsdn, arena_t *arena, arena_bin_t *bin,
arena_bin_nonfull_slab_get(tsdn_t *tsdn, arena_t *arena, bin_t *bin,
szind_t binind) {
extent_t *slab;
const arena_bin_info_t *bin_info;
const bin_info_t *bin_info;
/* Look for a usable slab. */
slab = arena_bin_slabs_nonfull_tryget(bin);
@ -1333,7 +1161,7 @@ arena_bin_nonfull_slab_get(tsdn_t *tsdn, arena_t *arena, arena_bin_t *bin,
}
/* No existing slabs have any space available. */
bin_info = &arena_bin_info[binind];
bin_info = &bin_infos[binind];
/* Allocate a new slab. */
malloc_mutex_unlock(tsdn, &bin->lock);
@ -1364,12 +1192,12 @@ arena_bin_nonfull_slab_get(tsdn_t *tsdn, arena_t *arena, arena_bin_t *bin,
/* Re-fill bin->slabcur, then call arena_slab_reg_alloc(). */
static void *
arena_bin_malloc_hard(tsdn_t *tsdn, arena_t *arena, arena_bin_t *bin,
arena_bin_malloc_hard(tsdn_t *tsdn, arena_t *arena, bin_t *bin,
szind_t binind) {
const arena_bin_info_t *bin_info;
const bin_info_t *bin_info;
extent_t *slab;
bin_info = &arena_bin_info[binind];
bin_info = &bin_infos[binind];
if (!arena_is_auto(arena) && bin->slabcur != NULL) {
arena_bin_slabs_full_insert(arena, bin, bin->slabcur);
bin->slabcur = NULL;
@ -1381,7 +1209,7 @@ arena_bin_malloc_hard(tsdn_t *tsdn, arena_t *arena, arena_bin_t *bin,
* bin lock in arena_bin_nonfull_slab_get().
*/
if (extent_nfree_get(bin->slabcur) > 0) {
void *ret = arena_slab_reg_alloc(tsdn, bin->slabcur,
void *ret = arena_slab_reg_alloc(bin->slabcur,
bin_info);
if (slab != NULL) {
/*
@ -1415,14 +1243,14 @@ arena_bin_malloc_hard(tsdn_t *tsdn, arena_t *arena, arena_bin_t *bin,
assert(extent_nfree_get(bin->slabcur) > 0);
return arena_slab_reg_alloc(tsdn, slab, bin_info);
return arena_slab_reg_alloc(slab, bin_info);
}
void
arena_tcache_fill_small(tsdn_t *tsdn, arena_t *arena, tcache_t *tcache,
tcache_bin_t *tbin, szind_t binind, uint64_t prof_accumbytes) {
cache_bin_t *tbin, szind_t binind, uint64_t prof_accumbytes) {
unsigned i, nfill;
arena_bin_t *bin;
bin_t *bin;
assert(tbin->ncached == 0);
@ -1437,8 +1265,7 @@ arena_tcache_fill_small(tsdn_t *tsdn, arena_t *arena, tcache_t *tcache,
void *ptr;
if ((slab = bin->slabcur) != NULL && extent_nfree_get(slab) >
0) {
ptr = arena_slab_reg_alloc(tsdn, slab,
&arena_bin_info[binind]);
ptr = arena_slab_reg_alloc(slab, &bin_infos[binind]);
} else {
ptr = arena_bin_malloc_hard(tsdn, arena, bin, binind);
}
@ -1455,8 +1282,7 @@ arena_tcache_fill_small(tsdn_t *tsdn, arena_t *arena, tcache_t *tcache,
break;
}
if (config_fill && unlikely(opt_junk_alloc)) {
arena_alloc_junk_small(ptr, &arena_bin_info[binind],
true);
arena_alloc_junk_small(ptr, &bin_infos[binind], true);
}
/* Insert such that low regions get used first. */
*(tbin->avail - nfill + i) = ptr;
@ -1474,14 +1300,14 @@ arena_tcache_fill_small(tsdn_t *tsdn, arena_t *arena, tcache_t *tcache,
}
void
arena_alloc_junk_small(void *ptr, const arena_bin_info_t *bin_info, bool zero) {
arena_alloc_junk_small(void *ptr, const bin_info_t *bin_info, bool zero) {
if (!zero) {
memset(ptr, JEMALLOC_ALLOC_JUNK, bin_info->reg_size);
}
}
static void
arena_dalloc_junk_small_impl(void *ptr, const arena_bin_info_t *bin_info) {
arena_dalloc_junk_small_impl(void *ptr, const bin_info_t *bin_info) {
memset(ptr, JEMALLOC_FREE_JUNK, bin_info->reg_size);
}
arena_dalloc_junk_small_t *JET_MUTABLE arena_dalloc_junk_small =
@ -1490,7 +1316,7 @@ arena_dalloc_junk_small_t *JET_MUTABLE arena_dalloc_junk_small =
static void *
arena_malloc_small(tsdn_t *tsdn, arena_t *arena, szind_t binind, bool zero) {
void *ret;
arena_bin_t *bin;
bin_t *bin;
size_t usize;
extent_t *slab;
@ -1500,7 +1326,7 @@ arena_malloc_small(tsdn_t *tsdn, arena_t *arena, szind_t binind, bool zero) {
malloc_mutex_lock(tsdn, &bin->lock);
if ((slab = bin->slabcur) != NULL && extent_nfree_get(slab) > 0) {
ret = arena_slab_reg_alloc(tsdn, slab, &arena_bin_info[binind]);
ret = arena_slab_reg_alloc(slab, &bin_infos[binind]);
} else {
ret = arena_bin_malloc_hard(tsdn, arena, bin, binind);
}
@ -1524,14 +1350,14 @@ arena_malloc_small(tsdn_t *tsdn, arena_t *arena, szind_t binind, bool zero) {
if (config_fill) {
if (unlikely(opt_junk_alloc)) {
arena_alloc_junk_small(ret,
&arena_bin_info[binind], false);
&bin_infos[binind], false);
} else if (unlikely(opt_zero)) {
memset(ret, 0, usize);
}
}
} else {
if (config_fill && unlikely(opt_junk_alloc)) {
arena_alloc_junk_small(ret, &arena_bin_info[binind],
arena_alloc_junk_small(ret, &bin_infos[binind],
true);
}
memset(ret, 0, usize);
@ -1636,13 +1462,13 @@ arena_dalloc_promoted(tsdn_t *tsdn, void *ptr, tcache_t *tcache,
}
static void
arena_dissociate_bin_slab(arena_t *arena, extent_t *slab, arena_bin_t *bin) {
arena_dissociate_bin_slab(arena_t *arena, extent_t *slab, bin_t *bin) {
/* Dissociate slab from bin. */
if (slab == bin->slabcur) {
bin->slabcur = NULL;
} else {
szind_t binind = extent_szind_get(slab);
const arena_bin_info_t *bin_info = &arena_bin_info[binind];
const bin_info_t *bin_info = &bin_infos[binind];
/*
* The following block's conditional is necessary because if the
@ -1659,7 +1485,7 @@ arena_dissociate_bin_slab(arena_t *arena, extent_t *slab, arena_bin_t *bin) {
static void
arena_dalloc_bin_slab(tsdn_t *tsdn, arena_t *arena, extent_t *slab,
arena_bin_t *bin) {
bin_t *bin) {
assert(slab != bin->slabcur);
malloc_mutex_unlock(tsdn, &bin->lock);
@ -1673,8 +1499,8 @@ arena_dalloc_bin_slab(tsdn_t *tsdn, arena_t *arena, extent_t *slab,
}
static void
arena_bin_lower_slab(tsdn_t *tsdn, arena_t *arena, extent_t *slab,
arena_bin_t *bin) {
arena_bin_lower_slab(UNUSED tsdn_t *tsdn, arena_t *arena, extent_t *slab,
bin_t *bin) {
assert(extent_nfree_get(slab) > 0);
/*
@ -1704,14 +1530,14 @@ arena_dalloc_bin_locked_impl(tsdn_t *tsdn, arena_t *arena, extent_t *slab,
void *ptr, bool junked) {
arena_slab_data_t *slab_data = extent_slab_data_get(slab);
szind_t binind = extent_szind_get(slab);
arena_bin_t *bin = &arena->bins[binind];
const arena_bin_info_t *bin_info = &arena_bin_info[binind];
bin_t *bin = &arena->bins[binind];
const bin_info_t *bin_info = &bin_infos[binind];
if (!junked && config_fill && unlikely(opt_junk_free)) {
arena_dalloc_junk_small(ptr, bin_info);
}
arena_slab_reg_dalloc(tsdn, slab, slab_data, ptr);
arena_slab_reg_dalloc(slab, slab_data, ptr);
unsigned nfree = extent_nfree_get(slab);
if (nfree == bin_info->nregs) {
arena_dissociate_bin_slab(arena, slab, bin);
@ -1736,7 +1562,7 @@ arena_dalloc_bin_junked_locked(tsdn_t *tsdn, arena_t *arena, extent_t *extent,
static void
arena_dalloc_bin(tsdn_t *tsdn, arena_t *arena, extent_t *extent, void *ptr) {
szind_t binind = extent_szind_get(extent);
arena_bin_t *bin = &arena->bins[binind];
bin_t *bin = &arena->bins[binind];
malloc_mutex_lock(tsdn, &bin->lock);
arena_dalloc_bin_locked_impl(tsdn, arena, extent, ptr, false);
@ -1770,7 +1596,7 @@ arena_ralloc_no_move(tsdn_t *tsdn, void *ptr, size_t oldsize, size_t size,
* Avoid moving the allocation if the size class can be left the
* same.
*/
assert(arena_bin_info[sz_size2index(oldsize)].reg_size ==
assert(bin_infos[sz_size2index(oldsize)].reg_size ==
oldsize);
if ((usize_max > SMALL_MAXCLASS || sz_size2index(usize_max) !=
sz_size2index(oldsize)) && (size > oldsize || usize_max <
@ -1885,6 +1711,33 @@ arena_muzzy_decay_ms_default_set(ssize_t decay_ms) {
return false;
}
bool
arena_retain_grow_limit_get_set(tsd_t *tsd, arena_t *arena, size_t *old_limit,
size_t *new_limit) {
assert(opt_retain);
pszind_t new_ind JEMALLOC_CC_SILENCE_INIT(0);
if (new_limit != NULL) {
size_t limit = *new_limit;
/* Grow no more than the new limit. */
if ((new_ind = sz_psz2ind(limit + 1) - 1) >
EXTENT_GROW_MAX_PIND) {
return true;
}
}
malloc_mutex_lock(tsd_tsdn(tsd), &arena->extent_grow_mtx);
if (old_limit != NULL) {
*old_limit = sz_pind2sz(arena->retain_grow_limit);
}
if (new_limit != NULL) {
arena->retain_grow_limit = new_ind;
}
malloc_mutex_unlock(tsd_tsdn(tsd), &arena->extent_grow_mtx);
return false;
}
unsigned
arena_nthreads_get(arena_t *arena, bool internal) {
return atomic_load_u(&arena->nthreads[internal], ATOMIC_RELAXED);
@ -1935,6 +1788,7 @@ arena_new(tsdn_t *tsdn, unsigned ind, extent_hooks_t *extent_hooks) {
}
ql_new(&arena->tcache_ql);
ql_new(&arena->cache_bin_array_descriptor_ql);
if (malloc_mutex_init(&arena->tcache_ql_mtx, "tcache_ql",
WITNESS_RANK_TCACHE_QL, malloc_mutex_rank_exclusive)) {
goto label_error;
@ -2001,16 +1855,17 @@ arena_new(tsdn_t *tsdn, unsigned ind, extent_hooks_t *extent_hooks) {
goto label_error;
}
if (arena_decay_init(&arena->decay_dirty, &arena->extents_dirty,
if (arena_decay_init(&arena->decay_dirty,
arena_dirty_decay_ms_default_get(), &arena->stats.decay_dirty)) {
goto label_error;
}
if (arena_decay_init(&arena->decay_muzzy, &arena->extents_muzzy,
if (arena_decay_init(&arena->decay_muzzy,
arena_muzzy_decay_ms_default_get(), &arena->stats.decay_muzzy)) {
goto label_error;
}
arena->extent_grow_next = sz_psz2ind(HUGEPAGE);
arena->retain_grow_limit = EXTENT_GROW_MAX_PIND;
if (malloc_mutex_init(&arena->extent_grow_mtx, "extent_grow",
WITNESS_RANK_EXTENT_GROW, malloc_mutex_rank_exclusive)) {
goto label_error;
@ -2024,17 +1879,10 @@ arena_new(tsdn_t *tsdn, unsigned ind, extent_hooks_t *extent_hooks) {
/* Initialize bins. */
for (i = 0; i < NBINS; i++) {
arena_bin_t *bin = &arena->bins[i];
if (malloc_mutex_init(&bin->lock, "arena_bin",
WITNESS_RANK_ARENA_BIN, malloc_mutex_rank_exclusive)) {
bool err = bin_init(&arena->bins[i]);
if (err) {
goto label_error;
}
bin->slabcur = NULL;
extent_heap_new(&bin->slabs_nonfull);
extent_list_init(&bin->slabs_full);
if (config_stats) {
memset(&bin->stats, 0, sizeof(malloc_bin_stats_t));
}
}
arena->base = base;
@ -2070,6 +1918,16 @@ void
arena_boot(void) {
arena_dirty_decay_ms_default_set(opt_dirty_decay_ms);
arena_muzzy_decay_ms_default_set(opt_muzzy_decay_ms);
#define REGIND_bin_yes(index, reg_size) \
div_init(&arena_binind_div_info[(index)], (reg_size));
#define REGIND_bin_no(index, reg_size)
#define SC(index, lg_grp, lg_delta, ndelta, psz, bin, pgs, \
lg_delta_lookup) \
REGIND_bin_##bin(index, (1U<<lg_grp) + (ndelta << lg_delta))
SIZE_CLASSES
#undef REGIND_bin_yes
#undef REGIND_bin_no
#undef SC
}
void
@ -2115,7 +1973,7 @@ arena_prefork6(tsdn_t *tsdn, arena_t *arena) {
void
arena_prefork7(tsdn_t *tsdn, arena_t *arena) {
for (unsigned i = 0; i < NBINS; i++) {
malloc_mutex_prefork(tsdn, &arena->bins[i].lock);
bin_prefork(tsdn, &arena->bins[i]);
}
}
@ -2124,7 +1982,7 @@ arena_postfork_parent(tsdn_t *tsdn, arena_t *arena) {
unsigned i;
for (i = 0; i < NBINS; i++) {
malloc_mutex_postfork_parent(tsdn, &arena->bins[i].lock);
bin_postfork_parent(tsdn, &arena->bins[i]);
}
malloc_mutex_postfork_parent(tsdn, &arena->large_mtx);
base_postfork_parent(tsdn, arena->base);
@ -2154,15 +2012,21 @@ arena_postfork_child(tsdn_t *tsdn, arena_t *arena) {
}
if (config_stats) {
ql_new(&arena->tcache_ql);
ql_new(&arena->cache_bin_array_descriptor_ql);
tcache_t *tcache = tcache_get(tsdn_tsd(tsdn));
if (tcache != NULL && tcache->arena == arena) {
ql_elm_new(tcache, link);
ql_tail_insert(&arena->tcache_ql, tcache, link);
cache_bin_array_descriptor_init(
&tcache->cache_bin_array_descriptor,
tcache->bins_small, tcache->bins_large);
ql_tail_insert(&arena->cache_bin_array_descriptor_ql,
&tcache->cache_bin_array_descriptor, link);
}
}
for (i = 0; i < NBINS; i++) {
malloc_mutex_postfork_child(tsdn, &arena->bins[i].lock);
bin_postfork_child(tsdn, &arena->bins[i]);
}
malloc_mutex_postfork_child(tsdn, &arena->large_mtx);
base_postfork_child(tsdn, arena->base);

147
src/background_thread.c
View File

@ -11,12 +11,14 @@
#define BACKGROUND_THREAD_DEFAULT false
/* Read-only after initialization. */
bool opt_background_thread = BACKGROUND_THREAD_DEFAULT;
size_t opt_max_background_threads = MAX_BACKGROUND_THREAD_LIMIT;
/* Used for thread creation, termination and stats. */
malloc_mutex_t background_thread_lock;
/* Indicates global state. Atomic because decay reads this w/o locking. */
atomic_b_t background_thread_enabled_state;
size_t n_background_threads;
size_t max_background_threads;
/* Thread info per-index. */
background_thread_info_t *background_thread_info;
@ -30,19 +32,20 @@ bool can_enable_background_thread;
static int (*pthread_create_fptr)(pthread_t *__restrict, const pthread_attr_t *,
void *(*)(void *), void *__restrict);
static pthread_once_t once_control = PTHREAD_ONCE_INIT;
static void
pthread_create_wrapper_once(void) {
pthread_create_wrapper_init(void) {
#ifdef JEMALLOC_LAZY_LOCK
if (!isthreaded) {
isthreaded = true;
}
#endif
}
int
pthread_create_wrapper(pthread_t *__restrict thread, const pthread_attr_t *attr,
void *(*start_routine)(void *), void *__restrict arg) {
pthread_once(&once_control, pthread_create_wrapper_once);
pthread_create_wrapper_init();
return pthread_create_fptr(thread, attr, start_routine, arg);
}
@ -286,7 +289,7 @@ background_work_sleep_once(tsdn_t *tsdn, background_thread_info_t *info, unsigne
uint64_t min_interval = BACKGROUND_THREAD_INDEFINITE_SLEEP;
unsigned narenas = narenas_total_get();
for (unsigned i = ind; i < narenas; i += ncpus) {
for (unsigned i = ind; i < narenas; i += max_background_threads) {
arena_t *arena = arena_get(tsdn, i, false);
if (!arena) {
continue;
@ -379,35 +382,32 @@ background_thread_create_signals_masked(pthread_t *thread,
return create_err;
}
static void
static bool
check_background_thread_creation(tsd_t *tsd, unsigned *n_created,
bool *created_threads) {
bool ret = false;
if (likely(*n_created == n_background_threads)) {
return;
return ret;
}
malloc_mutex_unlock(tsd_tsdn(tsd), &background_thread_info[0].mtx);
label_restart:
malloc_mutex_lock(tsd_tsdn(tsd), &background_thread_lock);
for (unsigned i = 1; i < ncpus; i++) {
tsdn_t *tsdn = tsd_tsdn(tsd);
malloc_mutex_unlock(tsdn, &background_thread_info[0].mtx);
for (unsigned i = 1; i < max_background_threads; i++) {
if (created_threads[i]) {
continue;
}
background_thread_info_t *info = &background_thread_info[i];
malloc_mutex_lock(tsd_tsdn(tsd), &info->mtx);
assert(info->state != background_thread_paused);
malloc_mutex_lock(tsdn, &info->mtx);
/*
* In case of the background_thread_paused state because of
* arena reset, delay the creation.
*/
bool create = (info->state == background_thread_started);
malloc_mutex_unlock(tsd_tsdn(tsd), &info->mtx);
malloc_mutex_unlock(tsdn, &info->mtx);
if (!create) {
continue;
}
/*
* To avoid deadlock with prefork handlers (which waits for the
* mutex held here), unlock before calling pthread_create().
*/
malloc_mutex_unlock(tsd_tsdn(tsd), &background_thread_lock);
pre_reentrancy(tsd, NULL);
int err = background_thread_create_signals_masked(&info->thread,
NULL, background_thread_entry, (void *)(uintptr_t)i);
@ -423,19 +423,21 @@ label_restart:
abort();
}
}
/* Restart since we unlocked. */
goto label_restart;
/* Return to restart the loop since we unlocked. */
ret = true;
break;
}
malloc_mutex_lock(tsd_tsdn(tsd), &background_thread_info[0].mtx);
malloc_mutex_unlock(tsd_tsdn(tsd), &background_thread_lock);
malloc_mutex_lock(tsdn, &background_thread_info[0].mtx);
return ret;
}
static void
background_thread0_work(tsd_t *tsd) {
/* Thread0 is also responsible for launching / terminating threads. */
VARIABLE_ARRAY(bool, created_threads, ncpus);
VARIABLE_ARRAY(bool, created_threads, max_background_threads);
unsigned i;
for (i = 1; i < ncpus; i++) {
for (i = 1; i < max_background_threads; i++) {
created_threads[i] = false;
}
/* Start working, and create more threads when asked. */
@ -445,8 +447,10 @@ background_thread0_work(tsd_t *tsd) {
&background_thread_info[0])) {
continue;
}
check_background_thread_creation(tsd, &n_created,
(bool *)&created_threads);
if (check_background_thread_creation(tsd, &n_created,
(bool *)&created_threads)) {
continue;
}
background_work_sleep_once(tsd_tsdn(tsd),
&background_thread_info[0], 0);
}
@ -456,15 +460,20 @@ background_thread0_work(tsd_t *tsd) {
* the global background_thread mutex (and is waiting) for us.
*/
assert(!background_thread_enabled());
for (i = 1; i < ncpus; i++) {
for (i = 1; i < max_background_threads; i++) {
background_thread_info_t *info = &background_thread_info[i];
assert(info->state != background_thread_paused);
if (created_threads[i]) {
background_threads_disable_single(tsd, info);
} else {
malloc_mutex_lock(tsd_tsdn(tsd), &info->mtx);
/* Clear in case the thread wasn't created. */
if (info->state != background_thread_stopped) {
/* The thread was not created. */
assert(info->state ==
background_thread_started);
n_background_threads--;
info->state = background_thread_stopped;
}
malloc_mutex_unlock(tsd_tsdn(tsd), &info->mtx);
}
}
@ -498,7 +507,7 @@ background_work(tsd_t *tsd, unsigned ind) {
static void *
background_thread_entry(void *ind_arg) {
unsigned thread_ind = (unsigned)(uintptr_t)ind_arg;
assert(thread_ind < ncpus);
assert(thread_ind < max_background_threads);
#ifdef JEMALLOC_HAVE_PTHREAD_SETNAME_NP
pthread_setname_np(pthread_self(), "jemalloc_bg_thd");
#endif
@ -532,7 +541,7 @@ background_thread_create(tsd_t *tsd, unsigned arena_ind) {
malloc_mutex_assert_owner(tsd_tsdn(tsd), &background_thread_lock);
/* We create at most NCPUs threads. */
size_t thread_ind = arena_ind % ncpus;
size_t thread_ind = arena_ind % max_background_threads;
background_thread_info_t *info = &background_thread_info[thread_ind];
bool need_new_thread;
@ -586,26 +595,29 @@ background_threads_enable(tsd_t *tsd) {
assert(background_thread_enabled());
malloc_mutex_assert_owner(tsd_tsdn(tsd), &background_thread_lock);
VARIABLE_ARRAY(bool, marked, ncpus);
VARIABLE_ARRAY(bool, marked, max_background_threads);
unsigned i, nmarked;
for (i = 0; i < ncpus; i++) {
for (i = 0; i < max_background_threads; i++) {
marked[i] = false;
}
nmarked = 0;
/* Thread 0 is required and created at the end. */
marked[0] = true;
/* Mark the threads we need to create for thread 0. */
unsigned n = narenas_total_get();
for (i = 1; i < n; i++) {
if (marked[i % ncpus] ||
if (marked[i % max_background_threads] ||
arena_get(tsd_tsdn(tsd), i, false) == NULL) {
continue;
}
background_thread_info_t *info = &background_thread_info[i];
background_thread_info_t *info = &background_thread_info[
i % max_background_threads];
malloc_mutex_lock(tsd_tsdn(tsd), &info->mtx);
assert(info->state == background_thread_stopped);
background_thread_init(tsd, info);
malloc_mutex_unlock(tsd_tsdn(tsd), &info->mtx);
marked[i % ncpus] = true;
if (++nmarked == ncpus) {
marked[i % max_background_threads] = true;
if (++nmarked == max_background_threads) {
break;
}
}
@ -720,14 +732,14 @@ background_thread_prefork0(tsdn_t *tsdn) {
void
background_thread_prefork1(tsdn_t *tsdn) {
for (unsigned i = 0; i < ncpus; i++) {
for (unsigned i = 0; i < max_background_threads; i++) {
malloc_mutex_prefork(tsdn, &background_thread_info[i].mtx);
}
}
void
background_thread_postfork_parent(tsdn_t *tsdn) {
for (unsigned i = 0; i < ncpus; i++) {
for (unsigned i = 0; i < max_background_threads; i++) {
malloc_mutex_postfork_parent(tsdn,
&background_thread_info[i].mtx);
}
@ -736,7 +748,7 @@ background_thread_postfork_parent(tsdn_t *tsdn) {
void
background_thread_postfork_child(tsdn_t *tsdn) {
for (unsigned i = 0; i < ncpus; i++) {
for (unsigned i = 0; i < max_background_threads; i++) {
malloc_mutex_postfork_child(tsdn,
&background_thread_info[i].mtx);
}
@ -749,7 +761,7 @@ background_thread_postfork_child(tsdn_t *tsdn) {
malloc_mutex_lock(tsdn, &background_thread_lock);
n_background_threads = 0;
background_thread_enabled_set(tsdn, false);
for (unsigned i = 0; i < ncpus; i++) {
for (unsigned i = 0; i < max_background_threads; i++) {
background_thread_info_t *info = &background_thread_info[i];
malloc_mutex_lock(tsdn, &info->mtx);
info->state = background_thread_stopped;
@ -773,7 +785,7 @@ background_thread_stats_read(tsdn_t *tsdn, background_thread_stats_t *stats) {
stats->num_threads = n_background_threads;
uint64_t num_runs = 0;
nstime_init(&stats->run_interval, 0);
for (unsigned i = 0; i < ncpus; i++) {
for (unsigned i = 0; i < max_background_threads; i++) {
background_thread_info_t *info = &background_thread_info[i];
malloc_mutex_lock(tsdn, &info->mtx);
if (info->state != background_thread_stopped) {
@ -795,6 +807,26 @@ background_thread_stats_read(tsdn_t *tsdn, background_thread_stats_t *stats) {
#undef BILLION
#undef BACKGROUND_THREAD_MIN_INTERVAL_NS
static bool
pthread_create_fptr_init(void) {
if (pthread_create_fptr != NULL) {
return false;
}
pthread_create_fptr = dlsym(RTLD_NEXT, "pthread_create");
if (pthread_create_fptr == NULL) {
can_enable_background_thread = false;
if (config_lazy_lock || opt_background_thread) {
malloc_write("<jemalloc>: Error in dlsym(RTLD_NEXT, "
"\"pthread_create\")\n");
abort();
}
} else {
can_enable_background_thread = true;
}
return false;
}
/*
* When lazy lock is enabled, we need to make sure setting isthreaded before
* taking any background_thread locks. This is called early in ctl (instead of
@ -805,7 +837,8 @@ void
background_thread_ctl_init(tsdn_t *tsdn) {
malloc_mutex_assert_not_owner(tsdn, &background_thread_lock);
#ifdef JEMALLOC_PTHREAD_CREATE_WRAPPER
pthread_once(&once_control, pthread_create_wrapper_once);
pthread_create_fptr_init();
pthread_create_wrapper_init();
#endif
}
@ -818,18 +851,10 @@ background_thread_boot0(void) {
"supports pthread only\n");
return true;
}
#ifdef JEMALLOC_PTHREAD_CREATE_WRAPPER
pthread_create_fptr = dlsym(RTLD_NEXT, "pthread_create");
if (pthread_create_fptr == NULL) {
can_enable_background_thread = false;
if (config_lazy_lock || opt_background_thread) {
malloc_write("<jemalloc>: Error in dlsym(RTLD_NEXT, "
"\"pthread_create\")\n");
abort();
}
} else {
can_enable_background_thread = true;
if ((config_lazy_lock || opt_background_thread) &&
pthread_create_fptr_init()) {
return true;
}
#endif
return false;
@ -841,6 +866,12 @@ background_thread_boot1(tsdn_t *tsdn) {
assert(have_background_thread);
assert(narenas_total_get() > 0);
if (opt_max_background_threads == MAX_BACKGROUND_THREAD_LIMIT &&
ncpus < MAX_BACKGROUND_THREAD_LIMIT) {
opt_max_background_threads = ncpus;
}
max_background_threads = opt_max_background_threads;
background_thread_enabled_set(tsdn, opt_background_thread);
if (malloc_mutex_init(&background_thread_lock,
"background_thread_global",
@ -848,17 +879,15 @@ background_thread_boot1(tsdn_t *tsdn) {
malloc_mutex_rank_exclusive)) {
return true;
}
if (opt_background_thread) {
background_thread_ctl_init(tsdn);
}
background_thread_info = (background_thread_info_t *)base_alloc(tsdn,
b0get(), ncpus * sizeof(background_thread_info_t), CACHELINE);
b0get(), opt_max_background_threads *
sizeof(background_thread_info_t), CACHELINE);
if (background_thread_info == NULL) {
return true;
}
for (unsigned i = 0; i < ncpus; i++) {
for (unsigned i = 0; i < max_background_threads; i++) {
background_thread_info_t *info = &background_thread_info[i];
/* Thread mutex is rank_inclusive because of thread0. */
if (malloc_mutex_init(&info->mtx, "background_thread",

164
src/base.c
View File

@ -12,23 +12,38 @@
static base_t *b0;
metadata_thp_mode_t opt_metadata_thp = METADATA_THP_DEFAULT;
const char *metadata_thp_mode_names[] = {
"disabled",
"auto",
"always"
};
/******************************************************************************/
static inline bool
metadata_thp_madvise(void) {
return (metadata_thp_enabled() &&
(init_system_thp_mode == thp_mode_default));
}
static void *
base_map(tsdn_t *tsdn, extent_hooks_t *extent_hooks, unsigned ind, size_t size) {
void *addr;
bool zero = true;
bool commit = true;
/* Use huge page sizes and alignment regardless of opt_metadata_thp. */
assert(size == HUGEPAGE_CEILING(size));
size_t alignment = HUGEPAGE;
if (extent_hooks == &extent_hooks_default) {
addr = extent_alloc_mmap(NULL, size, PAGE, &zero, &commit);
addr = extent_alloc_mmap(NULL, size, alignment, &zero, &commit);
} else {
/* No arena context as we are creating new arenas. */
tsd_t *tsd = tsdn_null(tsdn) ? tsd_fetch() : tsdn_tsd(tsdn);
pre_reentrancy(tsd, NULL);
addr = extent_hooks->alloc(extent_hooks, NULL, size, PAGE,
addr = extent_hooks->alloc(extent_hooks, NULL, size, alignment,
&zero, &commit, ind);
post_reentrancy(tsd);
}
@ -51,16 +66,16 @@ base_unmap(tsdn_t *tsdn, extent_hooks_t *extent_hooks, unsigned ind, void *addr,
*/
if (extent_hooks == &extent_hooks_default) {
if (!extent_dalloc_mmap(addr, size)) {
return;
goto label_done;
}
if (!pages_decommit(addr, size)) {
return;
goto label_done;
}
if (!pages_purge_forced(addr, size)) {
return;
goto label_done;
}
if (!pages_purge_lazy(addr, size)) {
return;
goto label_done;
}
/* Nothing worked. This should never happen. */
not_reached();
@ -70,27 +85,33 @@ base_unmap(tsdn_t *tsdn, extent_hooks_t *extent_hooks, unsigned ind, void *addr,
if (extent_hooks->dalloc != NULL &&
!extent_hooks->dalloc(extent_hooks, addr, size, true,
ind)) {
goto label_done;
goto label_post_reentrancy;
}
if (extent_hooks->decommit != NULL &&
!extent_hooks->decommit(extent_hooks, addr, size, 0, size,
ind)) {
goto label_done;
goto label_post_reentrancy;
}
if (extent_hooks->purge_forced != NULL &&
!extent_hooks->purge_forced(extent_hooks, addr, size, 0,
size, ind)) {
goto label_done;
goto label_post_reentrancy;
}
if (extent_hooks->purge_lazy != NULL &&
!extent_hooks->purge_lazy(extent_hooks, addr, size, 0, size,
ind)) {
goto label_done;
goto label_post_reentrancy;
}
/* Nothing worked. That's the application's problem. */
label_done:
label_post_reentrancy:
post_reentrancy(tsd);
return;
}
label_done:
if (metadata_thp_madvise()) {
/* Set NOHUGEPAGE after unmap to avoid kernel defrag. */
assert(((uintptr_t)addr & HUGEPAGE_MASK) == 0 &&
(size & HUGEPAGE_MASK) == 0);
pages_nohuge(addr, size);
}
}
@ -105,6 +126,56 @@ base_extent_init(size_t *extent_sn_next, extent_t *extent, void *addr,
extent_binit(extent, addr, size, sn);
}
static size_t
base_get_num_blocks(base_t *base, bool with_new_block) {
base_block_t *b = base->blocks;
assert(b != NULL);
size_t n_blocks = with_new_block ? 2 : 1;
while (b->next != NULL) {
n_blocks++;
b = b->next;
}
return n_blocks;
}
static void
base_auto_thp_switch(tsdn_t *tsdn, base_t *base) {
assert(opt_metadata_thp == metadata_thp_auto);
malloc_mutex_assert_owner(tsdn, &base->mtx);
if (base->auto_thp_switched) {
return;
}
/* Called when adding a new block. */
bool should_switch;
if (base_ind_get(base) != 0) {
should_switch = (base_get_num_blocks(base, true) ==
BASE_AUTO_THP_THRESHOLD);
} else {
should_switch = (base_get_num_blocks(base, true) ==
BASE_AUTO_THP_THRESHOLD_A0);
}
if (!should_switch) {
return;
}
base->auto_thp_switched = true;
assert(!config_stats || base->n_thp == 0);
/* Make the initial blocks THP lazily. */
base_block_t *block = base->blocks;
while (block != NULL) {
assert((block->size & HUGEPAGE_MASK) == 0);
pages_huge(block, block->size);
if (config_stats) {
base->n_thp += HUGEPAGE_CEILING(block->size -
extent_bsize_get(&block->extent)) >> LG_HUGEPAGE;
}
block = block->next;
assert(block == NULL || (base_ind_get(base) == 0));
}
}
static void *
base_extent_bump_alloc_helper(extent_t *extent, size_t *gap_size, size_t size,
size_t alignment) {
@ -124,8 +195,8 @@ base_extent_bump_alloc_helper(extent_t *extent, size_t *gap_size, size_t size,
}
static void
base_extent_bump_alloc_post(tsdn_t *tsdn, base_t *base, extent_t *extent,
size_t gap_size, void *addr, size_t size) {
base_extent_bump_alloc_post(base_t *base, extent_t *extent, size_t gap_size,
void *addr, size_t size) {
if (extent_bsize_get(extent) > 0) {
/*
* Compute the index for the largest size class that does not
@ -140,23 +211,31 @@ base_extent_bump_alloc_post(tsdn_t *tsdn, base_t *base, extent_t *extent,
base->allocated += size;
/*
* Add one PAGE to base_resident for every page boundary that is
* crossed by the new allocation.
* crossed by the new allocation. Adjust n_thp similarly when
* metadata_thp is enabled.
*/
base->resident += PAGE_CEILING((uintptr_t)addr + size) -
PAGE_CEILING((uintptr_t)addr - gap_size);
assert(base->allocated <= base->resident);
assert(base->resident <= base->mapped);
if (metadata_thp_madvise() && (opt_metadata_thp ==
metadata_thp_always || base->auto_thp_switched)) {
base->n_thp += (HUGEPAGE_CEILING((uintptr_t)addr + size)
- HUGEPAGE_CEILING((uintptr_t)addr - gap_size)) >>
LG_HUGEPAGE;
assert(base->mapped >= base->n_thp << LG_HUGEPAGE);
}
}
}
static void *
base_extent_bump_alloc(tsdn_t *tsdn, base_t *base, extent_t *extent,
size_t size, size_t alignment) {
base_extent_bump_alloc(base_t *base, extent_t *extent, size_t size,
size_t alignment) {
void *ret;
size_t gap_size;
ret = base_extent_bump_alloc_helper(extent, &gap_size, size, alignment);
base_extent_bump_alloc_post(tsdn, base, extent, gap_size, ret, size);
base_extent_bump_alloc_post(base, extent, gap_size, ret, size);
return ret;
}
@ -166,8 +245,8 @@ base_extent_bump_alloc(tsdn_t *tsdn, base_t *base, extent_t *extent,
* On success a pointer to the initialized base_block_t header is returned.
*/
static base_block_t *
base_block_alloc(tsdn_t *tsdn, extent_hooks_t *extent_hooks, unsigned ind,
pszind_t *pind_last, size_t *extent_sn_next, size_t size,
base_block_alloc(tsdn_t *tsdn, base_t *base, extent_hooks_t *extent_hooks,
unsigned ind, pszind_t *pind_last, size_t *extent_sn_next, size_t size,
size_t alignment) {
alignment = ALIGNMENT_CEILING(alignment, QUANTUM);
size_t usize = ALIGNMENT_CEILING(size, alignment);
@ -193,6 +272,25 @@ base_block_alloc(tsdn_t *tsdn, extent_hooks_t *extent_hooks, unsigned ind,
if (block == NULL) {
return NULL;
}
if (metadata_thp_madvise()) {
void *addr = (void *)block;
assert(((uintptr_t)addr & HUGEPAGE_MASK) == 0 &&
(block_size & HUGEPAGE_MASK) == 0);
if (opt_metadata_thp == metadata_thp_always) {
pages_huge(addr, block_size);
} else if (opt_metadata_thp == metadata_thp_auto &&
base != NULL) {
/* base != NULL indicates this is not a new base. */
malloc_mutex_lock(tsdn, &base->mtx);
base_auto_thp_switch(tsdn, base);
if (base->auto_thp_switched) {
pages_huge(addr, block_size);
}
malloc_mutex_unlock(tsdn, &base->mtx);
}
}
*pind_last = sz_psz2ind(block_size);
block->size = block_size;
block->next = NULL;
@ -216,7 +314,7 @@ base_extent_alloc(tsdn_t *tsdn, base_t *base, size_t size, size_t alignment) {
* called.
*/
malloc_mutex_unlock(tsdn, &base->mtx);
base_block_t *block = base_block_alloc(tsdn, extent_hooks,
base_block_t *block = base_block_alloc(tsdn, base, extent_hooks,
base_ind_get(base), &base->pind_last, &base->extent_sn_next, size,
alignment);
malloc_mutex_lock(tsdn, &base->mtx);
@ -229,8 +327,16 @@ base_extent_alloc(tsdn_t *tsdn, base_t *base, size_t size, size_t alignment) {
base->allocated += sizeof(base_block_t);
base->resident += PAGE_CEILING(sizeof(base_block_t));
base->mapped += block->size;
if (metadata_thp_madvise() &&
!(opt_metadata_thp == metadata_thp_auto
&& !base->auto_thp_switched)) {
assert(base->n_thp > 0);
base->n_thp += HUGEPAGE_CEILING(sizeof(base_block_t)) >>
LG_HUGEPAGE;
}
assert(base->allocated <= base->resident);
assert(base->resident <= base->mapped);
assert(base->n_thp << LG_HUGEPAGE <= base->mapped);
}
return &block->extent;
}
@ -244,7 +350,7 @@ base_t *
base_new(tsdn_t *tsdn, unsigned ind, extent_hooks_t *extent_hooks) {
pszind_t pind_last = 0;
size_t extent_sn_next = 0;
base_block_t *block = base_block_alloc(tsdn, extent_hooks, ind,
base_block_t *block = base_block_alloc(tsdn, NULL, extent_hooks, ind,
&pind_last, &extent_sn_next, sizeof(base_t), QUANTUM);
if (block == NULL) {
return NULL;
@ -265,6 +371,7 @@ base_new(tsdn_t *tsdn, unsigned ind, extent_hooks_t *extent_hooks) {
base->pind_last = pind_last;
base->extent_sn_next = extent_sn_next;
base->blocks = block;
base->auto_thp_switched = false;
for (szind_t i = 0; i < NSIZES; i++) {
extent_heap_new(&base->avail[i]);
}
@ -272,10 +379,14 @@ base_new(tsdn_t *tsdn, unsigned ind, extent_hooks_t *extent_hooks) {
base->allocated = sizeof(base_block_t);
base->resident = PAGE_CEILING(sizeof(base_block_t));
base->mapped = block->size;
base->n_thp = (opt_metadata_thp == metadata_thp_always) &&
metadata_thp_madvise() ? HUGEPAGE_CEILING(sizeof(base_block_t))
>> LG_HUGEPAGE : 0;
assert(base->allocated <= base->resident);
assert(base->resident <= base->mapped);
assert(base->n_thp << LG_HUGEPAGE <= base->mapped);
}
base_extent_bump_alloc_post(tsdn, base, &block->extent, gap_size, base,
base_extent_bump_alloc_post(base, &block->extent, gap_size, base,
base_size);
return base;
@ -332,7 +443,7 @@ base_alloc_impl(tsdn_t *tsdn, base_t *base, size_t size, size_t alignment,
goto label_return;
}
ret = base_extent_bump_alloc(tsdn, base, extent, usize, alignment);
ret = base_extent_bump_alloc(base, extent, usize, alignment);
if (esn != NULL) {
*esn = extent_sn_get(extent);
}
@ -368,7 +479,7 @@ base_alloc_extent(tsdn_t *tsdn, base_t *base) {
void
base_stats_get(tsdn_t *tsdn, base_t *base, size_t *allocated, size_t *resident,
size_t *mapped) {
size_t *mapped, size_t *n_thp) {
cassert(config_stats);
malloc_mutex_lock(tsdn, &base->mtx);
@ -377,6 +488,7 @@ base_stats_get(tsdn_t *tsdn, base_t *base, size_t *allocated, size_t *resident,
*allocated = base->allocated;
*resident = base->resident;
*mapped = base->mapped;
*n_thp = base->n_thp;
malloc_mutex_unlock(tsdn, &base->mtx);
}

50
src/bin.c Normal file
View File

@ -0,0 +1,50 @@
#include "jemalloc/internal/jemalloc_preamble.h"
#include "jemalloc/internal/jemalloc_internal_includes.h"
#include "jemalloc/internal/bin.h"
#include "jemalloc/internal/witness.h"
const bin_info_t bin_infos[NBINS] = {
#define BIN_INFO_bin_yes(reg_size, slab_size, nregs) \
{reg_size, slab_size, nregs, BITMAP_INFO_INITIALIZER(nregs)},
#define BIN_INFO_bin_no(reg_size, slab_size, nregs)
#define SC(index, lg_grp, lg_delta, ndelta, psz, bin, pgs, \
lg_delta_lookup) \
BIN_INFO_bin_##bin((1U<<lg_grp) + (ndelta<<lg_delta), \
(pgs << LG_PAGE), (pgs << LG_PAGE) / ((1U<<lg_grp) + \
(ndelta<<lg_delta)))
SIZE_CLASSES
#undef BIN_INFO_bin_yes
#undef BIN_INFO_bin_no
#undef SC
};
bool
bin_init(bin_t *bin) {
if (malloc_mutex_init(&bin->lock, "bin", WITNESS_RANK_BIN,
malloc_mutex_rank_exclusive)) {
return true;
}
bin->slabcur = NULL;
extent_heap_new(&bin->slabs_nonfull);
extent_list_init(&bin->slabs_full);
if (config_stats) {
memset(&bin->stats, 0, sizeof(bin_stats_t));
}
return false;
}
void
bin_prefork(tsdn_t *tsdn, bin_t *bin) {
malloc_mutex_prefork(tsdn, &bin->lock);
}
void
bin_postfork_parent(tsdn_t *tsdn, bin_t *bin) {
malloc_mutex_postfork_parent(tsdn, &bin->lock);
}
void
bin_postfork_child(tsdn_t *tsdn, bin_t *bin) {
malloc_mutex_postfork_child(tsdn, &bin->lock);
}

291
src/ctl.c
View File

@ -57,6 +57,7 @@ static const ctl_named_node_t *n##_index(tsdn_t *tsdn, \
CTL_PROTO(version)
CTL_PROTO(epoch)
CTL_PROTO(background_thread)
CTL_PROTO(max_background_threads)
CTL_PROTO(thread_tcache_enabled)
CTL_PROTO(thread_tcache_flush)
CTL_PROTO(thread_prof_name)
@ -75,16 +76,17 @@ CTL_PROTO(config_prof)
CTL_PROTO(config_prof_libgcc)
CTL_PROTO(config_prof_libunwind)
CTL_PROTO(config_stats)
CTL_PROTO(config_thp)
CTL_PROTO(config_utrace)
CTL_PROTO(config_xmalloc)
CTL_PROTO(opt_abort)
CTL_PROTO(opt_abort_conf)
CTL_PROTO(opt_metadata_thp)
CTL_PROTO(opt_retain)
CTL_PROTO(opt_dss)
CTL_PROTO(opt_narenas)
CTL_PROTO(opt_percpu_arena)
CTL_PROTO(opt_background_thread)
CTL_PROTO(opt_max_background_threads)
CTL_PROTO(opt_dirty_decay_ms)
CTL_PROTO(opt_muzzy_decay_ms)
CTL_PROTO(opt_stats_print)
@ -94,6 +96,8 @@ CTL_PROTO(opt_zero)
CTL_PROTO(opt_utrace)
CTL_PROTO(opt_xmalloc)
CTL_PROTO(opt_tcache)
CTL_PROTO(opt_thp)
CTL_PROTO(opt_lg_extent_max_active_fit)
CTL_PROTO(opt_lg_tcache_max)
CTL_PROTO(opt_prof)
CTL_PROTO(opt_prof_prefix)
@ -117,6 +121,7 @@ CTL_PROTO(arena_i_dss)
CTL_PROTO(arena_i_dirty_decay_ms)
CTL_PROTO(arena_i_muzzy_decay_ms)
CTL_PROTO(arena_i_extent_hooks)
CTL_PROTO(arena_i_retain_grow_limit)
INDEX_PROTO(arena_i)
CTL_PROTO(arenas_bin_i_size)
CTL_PROTO(arenas_bin_i_nregs)
@ -134,6 +139,7 @@ CTL_PROTO(arenas_nbins)
CTL_PROTO(arenas_nhbins)
CTL_PROTO(arenas_nlextents)
CTL_PROTO(arenas_create)
CTL_PROTO(arenas_lookup)
CTL_PROTO(prof_thread_active_init)
CTL_PROTO(prof_active)
CTL_PROTO(prof_dump)
@ -182,6 +188,7 @@ CTL_PROTO(stats_arenas_i_muzzy_nmadvise)
CTL_PROTO(stats_arenas_i_muzzy_purged)
CTL_PROTO(stats_arenas_i_base)
CTL_PROTO(stats_arenas_i_internal)
CTL_PROTO(stats_arenas_i_metadata_thp)
CTL_PROTO(stats_arenas_i_tcache_bytes)
CTL_PROTO(stats_arenas_i_resident)
INDEX_PROTO(stats_arenas_i)
@ -191,6 +198,7 @@ CTL_PROTO(stats_background_thread_num_threads)
CTL_PROTO(stats_background_thread_num_runs)
CTL_PROTO(stats_background_thread_run_interval)
CTL_PROTO(stats_metadata)
CTL_PROTO(stats_metadata_thp)
CTL_PROTO(stats_resident)
CTL_PROTO(stats_mapped)
CTL_PROTO(stats_retained)
@ -266,7 +274,6 @@ static const ctl_named_node_t config_node[] = {
{NAME("prof_libgcc"), CTL(config_prof_libgcc)},
{NAME("prof_libunwind"), CTL(config_prof_libunwind)},
{NAME("stats"), CTL(config_stats)},
{NAME("thp"), CTL(config_thp)},
{NAME("utrace"), CTL(config_utrace)},
{NAME("xmalloc"), CTL(config_xmalloc)}
};
@ -274,11 +281,13 @@ static const ctl_named_node_t config_node[] = {
static const ctl_named_node_t opt_node[] = {
{NAME("abort"), CTL(opt_abort)},
{NAME("abort_conf"), CTL(opt_abort_conf)},
{NAME("metadata_thp"), CTL(opt_metadata_thp)},
{NAME("retain"), CTL(opt_retain)},
{NAME("dss"), CTL(opt_dss)},
{NAME("narenas"), CTL(opt_narenas)},
{NAME("percpu_arena"), CTL(opt_percpu_arena)},
{NAME("background_thread"), CTL(opt_background_thread)},
{NAME("max_background_threads"), CTL(opt_max_background_threads)},
{NAME("dirty_decay_ms"), CTL(opt_dirty_decay_ms)},
{NAME("muzzy_decay_ms"), CTL(opt_muzzy_decay_ms)},
{NAME("stats_print"), CTL(opt_stats_print)},
@ -288,6 +297,8 @@ static const ctl_named_node_t opt_node[] = {
{NAME("utrace"), CTL(opt_utrace)},
{NAME("xmalloc"), CTL(opt_xmalloc)},
{NAME("tcache"), CTL(opt_tcache)},
{NAME("thp"), CTL(opt_thp)},
{NAME("lg_extent_max_active_fit"), CTL(opt_lg_extent_max_active_fit)},
{NAME("lg_tcache_max"), CTL(opt_lg_tcache_max)},
{NAME("prof"), CTL(opt_prof)},
{NAME("prof_prefix"), CTL(opt_prof_prefix)},
@ -316,7 +327,8 @@ static const ctl_named_node_t arena_i_node[] = {
{NAME("dss"), CTL(arena_i_dss)},
{NAME("dirty_decay_ms"), CTL(arena_i_dirty_decay_ms)},
{NAME("muzzy_decay_ms"), CTL(arena_i_muzzy_decay_ms)},
{NAME("extent_hooks"), CTL(arena_i_extent_hooks)}
{NAME("extent_hooks"), CTL(arena_i_extent_hooks)},
{NAME("retain_grow_limit"), CTL(arena_i_retain_grow_limit)}
};
static const ctl_named_node_t super_arena_i_node[] = {
{NAME(""), CHILD(named, arena_i)}
@ -362,7 +374,8 @@ static const ctl_named_node_t arenas_node[] = {
{NAME("bin"), CHILD(indexed, arenas_bin)},
{NAME("nlextents"), CTL(arenas_nlextents)},
{NAME("lextent"), CHILD(indexed, arenas_lextent)},
{NAME("create"), CTL(arenas_create)}
{NAME("create"), CTL(arenas_create)},
{NAME("lookup"), CTL(arenas_lookup)}
};
static const ctl_named_node_t prof_node[] = {
@ -474,6 +487,7 @@ static const ctl_named_node_t stats_arenas_i_node[] = {
{NAME("muzzy_purged"), CTL(stats_arenas_i_muzzy_purged)},
{NAME("base"), CTL(stats_arenas_i_base)},
{NAME("internal"), CTL(stats_arenas_i_internal)},
{NAME("metadata_thp"), CTL(stats_arenas_i_metadata_thp)},
{NAME("tcache_bytes"), CTL(stats_arenas_i_tcache_bytes)},
{NAME("resident"), CTL(stats_arenas_i_resident)},
{NAME("small"), CHILD(named, stats_arenas_i_small)},
@ -512,6 +526,7 @@ static const ctl_named_node_t stats_node[] = {
{NAME("allocated"), CTL(stats_allocated)},
{NAME("active"), CTL(stats_active)},
{NAME("metadata"), CTL(stats_metadata)},
{NAME("metadata_thp"), CTL(stats_metadata_thp)},
{NAME("resident"), CTL(stats_resident)},
{NAME("mapped"), CTL(stats_mapped)},
{NAME("retained"), CTL(stats_retained)},
@ -525,6 +540,7 @@ static const ctl_named_node_t root_node[] = {
{NAME("version"), CTL(version)},
{NAME("epoch"), CTL(epoch)},
{NAME("background_thread"), CTL(background_thread)},
{NAME("max_background_threads"), CTL(max_background_threads)},
{NAME("thread"), CHILD(named, thread)},
{NAME("config"), CHILD(named, config)},
{NAME("opt"), CHILD(named, opt)},
@ -550,7 +566,7 @@ static const ctl_named_node_t super_root_node[] = {
* synchronized by the ctl mutex.
*/
static void
accum_arena_stats_u64(arena_stats_u64_t *dst, arena_stats_u64_t *src) {
ctl_accum_arena_stats_u64(arena_stats_u64_t *dst, arena_stats_u64_t *src) {
#ifdef JEMALLOC_ATOMIC_U64
uint64_t cur_dst = atomic_load_u64(dst, ATOMIC_RELAXED);
uint64_t cur_src = atomic_load_u64(src, ATOMIC_RELAXED);
@ -562,7 +578,7 @@ accum_arena_stats_u64(arena_stats_u64_t *dst, arena_stats_u64_t *src) {
/* Likewise: with ctl mutex synchronization, reading is simple. */
static uint64_t
arena_stats_read_u64(arena_stats_u64_t *p) {
ctl_arena_stats_read_u64(arena_stats_u64_t *p) {
#ifdef JEMALLOC_ATOMIC_U64
return atomic_load_u64(p, ATOMIC_RELAXED);
#else
@ -570,7 +586,8 @@ arena_stats_read_u64(arena_stats_u64_t *p) {
#endif
}
static void accum_atomic_zu(atomic_zu_t *dst, atomic_zu_t *src) {
static void
accum_atomic_zu(atomic_zu_t *dst, atomic_zu_t *src) {
size_t cur_dst = atomic_load_zu(dst, ATOMIC_RELAXED);
size_t cur_src = atomic_load_zu(src, ATOMIC_RELAXED);
atomic_store_zu(dst, cur_dst + cur_src, ATOMIC_RELAXED);
@ -680,9 +697,9 @@ ctl_arena_clear(ctl_arena_t *ctl_arena) {
ctl_arena->astats->ndalloc_small = 0;
ctl_arena->astats->nrequests_small = 0;
memset(ctl_arena->astats->bstats, 0, NBINS *
sizeof(malloc_bin_stats_t));
sizeof(bin_stats_t));
memset(ctl_arena->astats->lstats, 0, (NSIZES - NBINS) *
sizeof(malloc_large_stats_t));
sizeof(arena_stats_large_t));
}
}
@ -745,18 +762,18 @@ ctl_arena_stats_sdmerge(ctl_arena_t *ctl_sdarena, ctl_arena_t *ctl_arena,
&astats->astats.retained);
}
accum_arena_stats_u64(&sdstats->astats.decay_dirty.npurge,
ctl_accum_arena_stats_u64(&sdstats->astats.decay_dirty.npurge,
&astats->astats.decay_dirty.npurge);
accum_arena_stats_u64(&sdstats->astats.decay_dirty.nmadvise,
ctl_accum_arena_stats_u64(&sdstats->astats.decay_dirty.nmadvise,
&astats->astats.decay_dirty.nmadvise);
accum_arena_stats_u64(&sdstats->astats.decay_dirty.purged,
ctl_accum_arena_stats_u64(&sdstats->astats.decay_dirty.purged,
&astats->astats.decay_dirty.purged);
accum_arena_stats_u64(&sdstats->astats.decay_muzzy.npurge,
ctl_accum_arena_stats_u64(&sdstats->astats.decay_muzzy.npurge,
&astats->astats.decay_muzzy.npurge);
accum_arena_stats_u64(&sdstats->astats.decay_muzzy.nmadvise,
ctl_accum_arena_stats_u64(&sdstats->astats.decay_muzzy.nmadvise,
&astats->astats.decay_muzzy.nmadvise);
accum_arena_stats_u64(&sdstats->astats.decay_muzzy.purged,
ctl_accum_arena_stats_u64(&sdstats->astats.decay_muzzy.purged,
&astats->astats.decay_muzzy.purged);
#define OP(mtx) malloc_mutex_prof_merge( \
@ -773,6 +790,8 @@ MUTEX_PROF_ARENA_MUTEXES
&astats->astats.internal);
accum_atomic_zu(&sdstats->astats.resident,
&astats->astats.resident);
accum_atomic_zu(&sdstats->astats.metadata_thp,
&astats->astats.metadata_thp);
} else {
assert(atomic_load_zu(
&astats->astats.internal, ATOMIC_RELAXED) == 0);
@ -794,11 +813,11 @@ MUTEX_PROF_ARENA_MUTEXES
assert(atomic_load_zu(&astats->astats.allocated_large,
ATOMIC_RELAXED) == 0);
}
accum_arena_stats_u64(&sdstats->astats.nmalloc_large,
ctl_accum_arena_stats_u64(&sdstats->astats.nmalloc_large,
&astats->astats.nmalloc_large);
accum_arena_stats_u64(&sdstats->astats.ndalloc_large,
ctl_accum_arena_stats_u64(&sdstats->astats.ndalloc_large,
&astats->astats.ndalloc_large);
accum_arena_stats_u64(&sdstats->astats.nrequests_large,
ctl_accum_arena_stats_u64(&sdstats->astats.nrequests_large,
&astats->astats.nrequests_large);
accum_atomic_zu(&sdstats->astats.tcache_bytes,
@ -835,11 +854,11 @@ MUTEX_PROF_ARENA_MUTEXES
}
for (i = 0; i < NSIZES - NBINS; i++) {
accum_arena_stats_u64(&sdstats->lstats[i].nmalloc,
ctl_accum_arena_stats_u64(&sdstats->lstats[i].nmalloc,
&astats->lstats[i].nmalloc);
accum_arena_stats_u64(&sdstats->lstats[i].ndalloc,
ctl_accum_arena_stats_u64(&sdstats->lstats[i].ndalloc,
&astats->lstats[i].ndalloc);
accum_arena_stats_u64(&sdstats->lstats[i].nrequests,
ctl_accum_arena_stats_u64(&sdstats->lstats[i].nrequests,
&astats->lstats[i].nrequests);
if (!destroyed) {
sdstats->lstats[i].curlextents +=
@ -938,6 +957,8 @@ ctl_refresh(tsdn_t *tsdn) {
&ctl_sarena->astats->astats.base, ATOMIC_RELAXED) +
atomic_load_zu(&ctl_sarena->astats->astats.internal,
ATOMIC_RELAXED);
ctl_stats->metadata_thp = atomic_load_zu(
&ctl_sarena->astats->astats.metadata_thp, ATOMIC_RELAXED);
ctl_stats->resident = atomic_load_zu(
&ctl_sarena->astats->astats.resident, ATOMIC_RELAXED);
ctl_stats->mapped = atomic_load_zu(
@ -1549,6 +1570,71 @@ label_return:
return ret;
}
static int
max_background_threads_ctl(tsd_t *tsd, const size_t *mib, size_t miblen,
void *oldp, size_t *oldlenp, void *newp, size_t newlen) {
int ret;
size_t oldval;
if (!have_background_thread) {
return ENOENT;
}
background_thread_ctl_init(tsd_tsdn(tsd));
malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx);
malloc_mutex_lock(tsd_tsdn(tsd), &background_thread_lock);
if (newp == NULL) {
oldval = max_background_threads;
READ(oldval, size_t);
} else {
if (newlen != sizeof(size_t)) {
ret = EINVAL;
goto label_return;
}
oldval = max_background_threads;
READ(oldval, size_t);
size_t newval = *(size_t *)newp;
if (newval == oldval) {
ret = 0;
goto label_return;
}
if (newval > opt_max_background_threads) {
ret = EINVAL;
goto label_return;
}
if (background_thread_enabled()) {
if (!can_enable_background_thread) {
malloc_printf("<jemalloc>: Error in dlsym("
"RTLD_NEXT, \"pthread_create\"). Cannot "
"enable background_thread\n");
ret = EFAULT;
goto label_return;
}
background_thread_enabled_set(tsd_tsdn(tsd), false);
if (background_threads_disable(tsd)) {
ret = EFAULT;
goto label_return;
}
max_background_threads = newval;
background_thread_enabled_set(tsd_tsdn(tsd), true);
if (background_threads_enable(tsd)) {
ret = EFAULT;
goto label_return;
}
} else {
max_background_threads = newval;
}
}
ret = 0;
label_return:
malloc_mutex_unlock(tsd_tsdn(tsd), &background_thread_lock);
malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx);
return ret;
}
/******************************************************************************/
CTL_RO_CONFIG_GEN(config_cache_oblivious, bool)
@ -1560,7 +1646,6 @@ CTL_RO_CONFIG_GEN(config_prof, bool)
CTL_RO_CONFIG_GEN(config_prof_libgcc, bool)
CTL_RO_CONFIG_GEN(config_prof_libunwind, bool)
CTL_RO_CONFIG_GEN(config_stats, bool)
CTL_RO_CONFIG_GEN(config_thp, bool)
CTL_RO_CONFIG_GEN(config_utrace, bool)
CTL_RO_CONFIG_GEN(config_xmalloc, bool)
@ -1568,12 +1653,15 @@ CTL_RO_CONFIG_GEN(config_xmalloc, bool)
CTL_RO_NL_GEN(opt_abort, opt_abort, bool)
CTL_RO_NL_GEN(opt_abort_conf, opt_abort_conf, bool)
CTL_RO_NL_GEN(opt_metadata_thp, metadata_thp_mode_names[opt_metadata_thp],
const char *)
CTL_RO_NL_GEN(opt_retain, opt_retain, bool)
CTL_RO_NL_GEN(opt_dss, opt_dss, const char *)
CTL_RO_NL_GEN(opt_narenas, opt_narenas, unsigned)
CTL_RO_NL_GEN(opt_percpu_arena, percpu_arena_mode_names[opt_percpu_arena],
const char *)
CTL_RO_NL_GEN(opt_background_thread, opt_background_thread, bool)
CTL_RO_NL_GEN(opt_max_background_threads, opt_max_background_threads, size_t)
CTL_RO_NL_GEN(opt_dirty_decay_ms, opt_dirty_decay_ms, ssize_t)
CTL_RO_NL_GEN(opt_muzzy_decay_ms, opt_muzzy_decay_ms, ssize_t)
CTL_RO_NL_GEN(opt_stats_print, opt_stats_print, bool)
@ -1583,6 +1671,9 @@ CTL_RO_NL_CGEN(config_fill, opt_zero, opt_zero, bool)
CTL_RO_NL_CGEN(config_utrace, opt_utrace, opt_utrace, bool)
CTL_RO_NL_CGEN(config_xmalloc, opt_xmalloc, opt_xmalloc, bool)
CTL_RO_NL_GEN(opt_tcache, opt_tcache, bool)
CTL_RO_NL_GEN(opt_thp, thp_mode_names[opt_thp], const char *)
CTL_RO_NL_GEN(opt_lg_extent_max_active_fit, opt_lg_extent_max_active_fit,
size_t)
CTL_RO_NL_GEN(opt_lg_tcache_max, opt_lg_tcache_max, ssize_t)
CTL_RO_NL_CGEN(config_prof, opt_prof, opt_prof, bool)
CTL_RO_NL_CGEN(config_prof, opt_prof_prefix, opt_prof_prefix, const char *)
@ -2162,10 +2253,31 @@ arena_i_extent_hooks_ctl(tsd_t *tsd, const size_t *mib, size_t miblen,
malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx);
MIB_UNSIGNED(arena_ind, 1);
if (arena_ind < narenas_total_get() && (arena =
arena_get(tsd_tsdn(tsd), arena_ind, false)) != NULL) {
if (newp != NULL) {
if (arena_ind < narenas_total_get()) {
extent_hooks_t *old_extent_hooks;
arena = arena_get(tsd_tsdn(tsd), arena_ind, false);
if (arena == NULL) {
if (arena_ind >= narenas_auto) {
ret = EFAULT;
goto label_return;
}
old_extent_hooks =
(extent_hooks_t *)&extent_hooks_default;
READ(old_extent_hooks, extent_hooks_t *);
if (newp != NULL) {
/* Initialize a new arena as a side effect. */
extent_hooks_t *new_extent_hooks
JEMALLOC_CC_SILENCE_INIT(NULL);
WRITE(new_extent_hooks, extent_hooks_t *);
arena = arena_init(tsd_tsdn(tsd), arena_ind,
new_extent_hooks);
if (arena == NULL) {
ret = EFAULT;
goto label_return;
}
}
} else {
if (newp != NULL) {
extent_hooks_t *new_extent_hooks
JEMALLOC_CC_SILENCE_INIT(NULL);
WRITE(new_extent_hooks, extent_hooks_t *);
@ -2173,10 +2285,10 @@ arena_i_extent_hooks_ctl(tsd_t *tsd, const size_t *mib, size_t miblen,
new_extent_hooks);
READ(old_extent_hooks, extent_hooks_t *);
} else {
extent_hooks_t *old_extent_hooks =
extent_hooks_get(arena);
old_extent_hooks = extent_hooks_get(arena);
READ(old_extent_hooks, extent_hooks_t *);
}
}
} else {
ret = EFAULT;
goto label_return;
@ -2187,6 +2299,42 @@ label_return:
return ret;
}
static int
arena_i_retain_grow_limit_ctl(tsd_t *tsd, const size_t *mib, size_t miblen,
void *oldp, size_t *oldlenp, void *newp, size_t newlen) {
int ret;
unsigned arena_ind;
arena_t *arena;
if (!opt_retain) {
/* Only relevant when retain is enabled. */
return ENOENT;
}
malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx);
MIB_UNSIGNED(arena_ind, 1);
if (arena_ind < narenas_total_get() && (arena =
arena_get(tsd_tsdn(tsd), arena_ind, false)) != NULL) {
size_t old_limit, new_limit;
if (newp != NULL) {
WRITE(new_limit, size_t);
}
bool err = arena_retain_grow_limit_get_set(tsd, arena,
&old_limit, newp != NULL ? &new_limit : NULL);
if (!err) {
READ(old_limit, size_t);
ret = 0;
} else {
ret = EFAULT;
}
} else {
ret = EFAULT;
}
label_return:
malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx);
return ret;
}
static const ctl_named_node_t *
arena_i_index(tsdn_t *tsdn, const size_t *mib, size_t miblen, size_t i) {
const ctl_named_node_t *ret;
@ -2279,9 +2427,9 @@ CTL_RO_NL_GEN(arenas_page, PAGE, size_t)
CTL_RO_NL_GEN(arenas_tcache_max, tcache_maxclass, size_t)
CTL_RO_NL_GEN(arenas_nbins, NBINS, unsigned)
CTL_RO_NL_GEN(arenas_nhbins, nhbins, unsigned)
CTL_RO_NL_GEN(arenas_bin_i_size, arena_bin_info[mib[2]].reg_size, size_t)
CTL_RO_NL_GEN(arenas_bin_i_nregs, arena_bin_info[mib[2]].nregs, uint32_t)
CTL_RO_NL_GEN(arenas_bin_i_slab_size, arena_bin_info[mib[2]].slab_size, size_t)
CTL_RO_NL_GEN(arenas_bin_i_size, bin_infos[mib[2]].reg_size, size_t)
CTL_RO_NL_GEN(arenas_bin_i_nregs, bin_infos[mib[2]].nregs, uint32_t)
CTL_RO_NL_GEN(arenas_bin_i_slab_size, bin_infos[mib[2]].slab_size, size_t)
static const ctl_named_node_t *
arenas_bin_i_index(tsdn_t *tsdn, const size_t *mib, size_t miblen, size_t i) {
if (i > NBINS) {
@ -2325,6 +2473,36 @@ label_return:
return ret;
}
static int
arenas_lookup_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp,
size_t *oldlenp, void *newp, size_t newlen) {
int ret;
unsigned arena_ind;
void *ptr;
extent_t *extent;
arena_t *arena;
ptr = NULL;
ret = EINVAL;
malloc_mutex_lock(tsd_tsdn(tsd), &ctl_mtx);
WRITE(ptr, void *);
extent = iealloc(tsd_tsdn(tsd), ptr);
if (extent == NULL)
goto label_return;
arena = extent_arena_get(extent);
if (arena == NULL)
goto label_return;
arena_ind = arena_ind_get(arena);
READ(arena_ind, unsigned);
ret = 0;
label_return:
malloc_mutex_unlock(tsd_tsdn(tsd), &ctl_mtx);
return ret;
}
/******************************************************************************/
static int
@ -2460,6 +2638,7 @@ CTL_RO_NL_CGEN(config_prof, lg_prof_sample, lg_prof_sample, size_t)
CTL_RO_CGEN(config_stats, stats_allocated, ctl_stats->allocated, size_t)
CTL_RO_CGEN(config_stats, stats_active, ctl_stats->active, size_t)
CTL_RO_CGEN(config_stats, stats_metadata, ctl_stats->metadata, size_t)
CTL_RO_CGEN(config_stats, stats_metadata_thp, ctl_stats->metadata_thp, size_t)
CTL_RO_CGEN(config_stats, stats_resident, ctl_stats->resident, size_t)
CTL_RO_CGEN(config_stats, stats_mapped, ctl_stats->mapped, size_t)
CTL_RO_CGEN(config_stats, stats_retained, ctl_stats->retained, size_t)
@ -2490,24 +2669,24 @@ CTL_RO_CGEN(config_stats, stats_arenas_i_retained,
size_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_dirty_npurge,
arena_stats_read_u64(&arenas_i(mib[2])->astats->astats.decay_dirty.npurge),
uint64_t)
ctl_arena_stats_read_u64(
&arenas_i(mib[2])->astats->astats.decay_dirty.npurge), uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_dirty_nmadvise,
arena_stats_read_u64(
ctl_arena_stats_read_u64(
&arenas_i(mib[2])->astats->astats.decay_dirty.nmadvise), uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_dirty_purged,
arena_stats_read_u64(&arenas_i(mib[2])->astats->astats.decay_dirty.purged),
uint64_t)
ctl_arena_stats_read_u64(
&arenas_i(mib[2])->astats->astats.decay_dirty.purged), uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_muzzy_npurge,
arena_stats_read_u64(&arenas_i(mib[2])->astats->astats.decay_muzzy.npurge),
uint64_t)
ctl_arena_stats_read_u64(
&arenas_i(mib[2])->astats->astats.decay_muzzy.npurge), uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_muzzy_nmadvise,
arena_stats_read_u64(
ctl_arena_stats_read_u64(
&arenas_i(mib[2])->astats->astats.decay_muzzy.nmadvise), uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_muzzy_purged,
arena_stats_read_u64(&arenas_i(mib[2])->astats->astats.decay_muzzy.purged),
uint64_t)
ctl_arena_stats_read_u64(
&arenas_i(mib[2])->astats->astats.decay_muzzy.purged), uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_base,
atomic_load_zu(&arenas_i(mib[2])->astats->astats.base, ATOMIC_RELAXED),
@ -2515,6 +2694,9 @@ CTL_RO_CGEN(config_stats, stats_arenas_i_base,
CTL_RO_CGEN(config_stats, stats_arenas_i_internal,
atomic_load_zu(&arenas_i(mib[2])->astats->astats.internal, ATOMIC_RELAXED),
size_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_metadata_thp,
atomic_load_zu(&arenas_i(mib[2])->astats->astats.metadata_thp,
ATOMIC_RELAXED), size_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_tcache_bytes,
atomic_load_zu(&arenas_i(mib[2])->astats->astats.tcache_bytes,
ATOMIC_RELAXED), size_t)
@ -2534,14 +2716,17 @@ CTL_RO_CGEN(config_stats, stats_arenas_i_large_allocated,
atomic_load_zu(&arenas_i(mib[2])->astats->astats.allocated_large,
ATOMIC_RELAXED), size_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_large_nmalloc,
arena_stats_read_u64(&arenas_i(mib[2])->astats->astats.nmalloc_large),
uint64_t)
ctl_arena_stats_read_u64(
&arenas_i(mib[2])->astats->astats.nmalloc_large), uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_large_ndalloc,
arena_stats_read_u64(&arenas_i(mib[2])->astats->astats.ndalloc_large),
uint64_t)
ctl_arena_stats_read_u64(
&arenas_i(mib[2])->astats->astats.ndalloc_large), uint64_t)
/*
* Note: "nmalloc" here instead of "nrequests" in the read. This is intentional.
*/
CTL_RO_CGEN(config_stats, stats_arenas_i_large_nrequests,
arena_stats_read_u64(&arenas_i(mib[2])->astats->astats.nmalloc_large),
uint64_t) /* Intentional. */
ctl_arena_stats_read_u64(
&arenas_i(mib[2])->astats->astats.nmalloc_large), uint64_t) /* Intentional. */
/* Lock profiling related APIs below. */
#define RO_MUTEX_CTL_GEN(n, l) \
@ -2622,7 +2807,7 @@ stats_mutexes_reset_ctl(tsd_t *tsd, const size_t *mib, size_t miblen,
MUTEX_PROF_RESET(arena->base->mtx);
for (szind_t i = 0; i < NBINS; i++) {
arena_bin_t *bin = &arena->bins[i];
bin_t *bin = &arena->bins[i];
MUTEX_PROF_RESET(bin->lock);
}
}
@ -2659,14 +2844,14 @@ stats_arenas_i_bins_j_index(tsdn_t *tsdn, const size_t *mib, size_t miblen,
}
CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_nmalloc,
arena_stats_read_u64(&arenas_i(mib[2])->astats->lstats[mib[4]].nmalloc),
uint64_t)
ctl_arena_stats_read_u64(
&arenas_i(mib[2])->astats->lstats[mib[4]].nmalloc), uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_ndalloc,
arena_stats_read_u64(&arenas_i(mib[2])->astats->lstats[mib[4]].ndalloc),
uint64_t)
ctl_arena_stats_read_u64(
&arenas_i(mib[2])->astats->lstats[mib[4]].ndalloc), uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_nrequests,
arena_stats_read_u64(&arenas_i(mib[2])->astats->lstats[mib[4]].nrequests),
uint64_t)
ctl_arena_stats_read_u64(
&arenas_i(mib[2])->astats->lstats[mib[4]].nrequests), uint64_t)
CTL_RO_CGEN(config_stats, stats_arenas_i_lextents_j_curlextents,
arenas_i(mib[2])->astats->lstats[mib[4]].curlextents, size_t)

55
src/div.c Normal file
View File

@ -0,0 +1,55 @@
#include "jemalloc/internal/jemalloc_preamble.h"
#include "jemalloc/internal/div.h"
#include "jemalloc/internal/assert.h"
/*
* Suppose we have n = q * d, all integers. We know n and d, and want q = n / d.
*
* For any k, we have (here, all division is exact; not C-style rounding):
* floor(ceil(2^k / d) * n / 2^k) = floor((2^k + r) / d * n / 2^k), where
* r = (-2^k) mod d.
*
* Expanding this out:
* ... = floor(2^k / d * n / 2^k + r / d * n / 2^k)
* = floor(n / d + (r / d) * (n / 2^k)).
*
* The fractional part of n / d is 0 (because of the assumption that d divides n
* exactly), so we have:
* ... = n / d + floor((r / d) * (n / 2^k))
*
* So that our initial expression is equal to the quantity we seek, so long as
* (r / d) * (n / 2^k) < 1.
*
* r is a remainder mod d, so r < d and r / d < 1 always. We can make
* n / 2 ^ k < 1 by setting k = 32. This gets us a value of magic that works.
*/
void
div_init(div_info_t *div_info, size_t d) {
/* Nonsensical. */
assert(d != 0);
/*
* This would make the value of magic too high to fit into a uint32_t
* (we would want magic = 2^32 exactly). This would mess with code gen
* on 32-bit machines.
*/
assert(d != 1);
uint64_t two_to_k = ((uint64_t)1 << 32);
uint32_t magic = (uint32_t)(two_to_k / d);
/*
* We want magic = ceil(2^k / d), but C gives us floor. We have to
* increment it unless the result was exact (i.e. unless d is a power of
* two).
*/
if (two_to_k % d != 0) {
magic++;
}
div_info->magic = magic;
#ifdef JEMALLOC_DEBUG
div_info->d = d;
#endif
}

496
src/extent.c
View File

@ -17,6 +17,8 @@ rtree_t extents_rtree;
/* Keyed by the address of the extent_t being protected. */
mutex_pool_t extent_mutex_pool;
size_t opt_lg_extent_max_active_fit = LG_EXTENT_MAX_ACTIVE_FIT_DEFAULT;
static const bitmap_info_t extents_bitmap_info =
BITMAP_INFO_INITIALIZER(NPSIZES+1);
@ -117,7 +119,7 @@ static void extent_record(tsdn_t *tsdn, arena_t *arena,
/******************************************************************************/
rb_gen(UNUSED, extent_avail_, extent_tree_t, extent_t, rb_link,
ph_gen(UNUSED, extent_avail_, extent_tree_t, extent_t, ph_link,
extent_esnead_comp)
typedef enum {
@ -304,8 +306,7 @@ extents_npages_get(extents_t *extents) {
}
static void
extents_insert_locked(tsdn_t *tsdn, extents_t *extents, extent_t *extent,
bool preserve_lru) {
extents_insert_locked(tsdn_t *tsdn, extents_t *extents, extent_t *extent) {
malloc_mutex_assert_owner(tsdn, &extents->mtx);
assert(extent_state_get(extent) == extents->state);
@ -317,9 +318,7 @@ extents_insert_locked(tsdn_t *tsdn, extents_t *extents, extent_t *extent,
(size_t)pind);
}
extent_heap_insert(&extents->heaps[pind], extent);
if (!preserve_lru) {
extent_list_append(&extents->lru, extent);
}
size_t npages = size >> LG_PAGE;
/*
* All modifications to npages hold the mutex (as asserted above), so we
@ -333,8 +332,7 @@ extents_insert_locked(tsdn_t *tsdn, extents_t *extents, extent_t *extent,
}
static void
extents_remove_locked(tsdn_t *tsdn, extents_t *extents, extent_t *extent,
bool preserve_lru) {
extents_remove_locked(tsdn_t *tsdn, extents_t *extents, extent_t *extent) {
malloc_mutex_assert_owner(tsdn, &extents->mtx);
assert(extent_state_get(extent) == extents->state);
@ -346,9 +344,7 @@ extents_remove_locked(tsdn_t *tsdn, extents_t *extents, extent_t *extent,
bitmap_set(extents->bitmap, &extents_bitmap_info,
(size_t)pind);
}
if (!preserve_lru) {
extent_list_remove(&extents->lru, extent);
}
size_t npages = size >> LG_PAGE;
/*
* As in extents_insert_locked, we hold extents->mtx and so don't need
@ -361,6 +357,43 @@ extents_remove_locked(tsdn_t *tsdn, extents_t *extents, extent_t *extent,
cur_extents_npages - (size >> LG_PAGE), ATOMIC_RELAXED);
}
/*
* Find an extent with size [min_size, max_size) to satisfy the alignment
* requirement. For each size, try only the first extent in the heap.
*/
static extent_t *
extents_fit_alignment(extents_t *extents, size_t min_size, size_t max_size,
size_t alignment) {
pszind_t pind = sz_psz2ind(extent_size_quantize_ceil(min_size));
pszind_t pind_max = sz_psz2ind(extent_size_quantize_ceil(max_size));
for (pszind_t i = (pszind_t)bitmap_ffu(extents->bitmap,
&extents_bitmap_info, (size_t)pind); i < pind_max; i =
(pszind_t)bitmap_ffu(extents->bitmap, &extents_bitmap_info,
(size_t)i+1)) {
assert(i < NPSIZES);
assert(!extent_heap_empty(&extents->heaps[i]));
extent_t *extent = extent_heap_first(&extents->heaps[i]);
uintptr_t base = (uintptr_t)extent_base_get(extent);
size_t candidate_size = extent_size_get(extent);
assert(candidate_size >= min_size);
uintptr_t next_align = ALIGNMENT_CEILING((uintptr_t)base,
PAGE_CEILING(alignment));
if (base > next_align || base + candidate_size <= next_align) {
/* Overflow or not crossing the next alignment. */
continue;
}
size_t leadsize = next_align - base;
if (candidate_size - leadsize >= min_size) {
return extent;
}
}
return NULL;
}
/* Do any-best-fit extent selection, i.e. select any extent that best fits. */
static extent_t *
extents_best_fit_locked(tsdn_t *tsdn, arena_t *arena, extents_t *extents,
@ -369,8 +402,15 @@ extents_best_fit_locked(tsdn_t *tsdn, arena_t *arena, extents_t *extents,
pszind_t i = (pszind_t)bitmap_ffu(extents->bitmap, &extents_bitmap_info,
(size_t)pind);
if (i < NPSIZES+1) {
/*
* In order to reduce fragmentation, avoid reusing and splitting
* large extents for much smaller sizes.
*/
if ((sz_pind2sz(i) >> opt_lg_extent_max_active_fit) > size) {
return NULL;
}
assert(!extent_heap_empty(&extents->heaps[i]));
extent_t *extent = extent_heap_any(&extents->heaps[i]);
extent_t *extent = extent_heap_first(&extents->heaps[i]);
assert(extent_size_get(extent) >= size);
return extent;
}
@ -415,12 +455,30 @@ extents_first_fit_locked(tsdn_t *tsdn, arena_t *arena, extents_t *extents,
*/
static extent_t *
extents_fit_locked(tsdn_t *tsdn, arena_t *arena, extents_t *extents,
size_t size) {
size_t esize, size_t alignment) {
malloc_mutex_assert_owner(tsdn, &extents->mtx);
return extents->delay_coalesce ? extents_best_fit_locked(tsdn, arena,
extents, size) : extents_first_fit_locked(tsdn, arena, extents,
size);
size_t max_size = esize + PAGE_CEILING(alignment) - PAGE;
/* Beware size_t wrap-around. */
if (max_size < esize) {
return NULL;
}
extent_t *extent = extents->delay_coalesce ?
extents_best_fit_locked(tsdn, arena, extents, max_size) :
extents_first_fit_locked(tsdn, arena, extents, max_size);
if (alignment > PAGE && extent == NULL) {
/*
* max_size guarantees the alignment requirement but is rather
* pessimistic. Next we try to satisfy the aligned allocation
* with sizes in [esize, max_size).
*/
extent = extents_fit_alignment(extents, esize, max_size,
alignment);
}
return extent;
}
static bool
@ -436,7 +494,7 @@ extent_try_delayed_coalesce(tsdn_t *tsdn, arena_t *arena,
if (!coalesced) {
return true;
}
extents_insert_locked(tsdn, extents, extent, true);
extents_insert_locked(tsdn, extents, extent);
return false;
}
@ -449,8 +507,10 @@ extents_alloc(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
WITNESS_RANK_CORE, 0);
return extent_recycle(tsdn, arena, r_extent_hooks, extents, new_addr,
size, pad, alignment, slab, szind, zero, commit, false);
extent_t *extent = extent_recycle(tsdn, arena, r_extent_hooks, extents,
new_addr, size, pad, alignment, slab, szind, zero, commit, false);
assert(extent == NULL || extent_dumpable_get(extent));
return extent;
}
void
@ -458,6 +518,7 @@ extents_dalloc(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
extents_t *extents, extent_t *extent) {
assert(extent_base_get(extent) != NULL);
assert(extent_size_get(extent) != 0);
assert(extent_dumpable_get(extent));
witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
WITNESS_RANK_CORE, 0);
@ -487,14 +548,13 @@ extents_evict(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
goto label_return;
}
/* Check the eviction limit. */
size_t npages = extent_size_get(extent) >> LG_PAGE;
size_t extents_npages = atomic_load_zu(&extents->npages,
ATOMIC_RELAXED);
if (extents_npages - npages < npages_min) {
if (extents_npages <= npages_min) {
extent = NULL;
goto label_return;
}
extents_remove_locked(tsdn, extents, extent, false);
extents_remove_locked(tsdn, extents, extent);
if (!extents->delay_coalesce) {
break;
}
@ -567,29 +627,29 @@ extents_postfork_child(tsdn_t *tsdn, extents_t *extents) {
static void
extent_deactivate_locked(tsdn_t *tsdn, arena_t *arena, extents_t *extents,
extent_t *extent, bool preserve_lru) {
extent_t *extent) {
assert(extent_arena_get(extent) == arena);
assert(extent_state_get(extent) == extent_state_active);
extent_state_set(extent, extents_state_get(extents));
extents_insert_locked(tsdn, extents, extent, preserve_lru);
extents_insert_locked(tsdn, extents, extent);
}
static void
extent_deactivate(tsdn_t *tsdn, arena_t *arena, extents_t *extents,
extent_t *extent, bool preserve_lru) {
extent_t *extent) {
malloc_mutex_lock(tsdn, &extents->mtx);
extent_deactivate_locked(tsdn, arena, extents, extent, preserve_lru);
extent_deactivate_locked(tsdn, arena, extents, extent);
malloc_mutex_unlock(tsdn, &extents->mtx);
}
static void
extent_activate_locked(tsdn_t *tsdn, arena_t *arena, extents_t *extents,
extent_t *extent, bool preserve_lru) {
extent_t *extent) {
assert(extent_arena_get(extent) == arena);
assert(extent_state_get(extent) == extents_state_get(extents));
extents_remove_locked(tsdn, extents, extent, preserve_lru);
extents_remove_locked(tsdn, extents, extent);
extent_state_set(extent, extent_state_active);
}
@ -723,6 +783,13 @@ extent_reregister(tsdn_t *tsdn, extent_t *extent) {
assert(!err);
}
/*
* Removes all pointers to the given extent from the global rtree indices for
* its interior. This is relevant for slab extents, for which we need to do
* metadata lookups at places other than the head of the extent. We deregister
* on the interior, then, when an extent moves from being an active slab to an
* inactive state.
*/
static void
extent_interior_deregister(tsdn_t *tsdn, rtree_ctx_t *rtree_ctx,
extent_t *extent) {
@ -737,8 +804,11 @@ extent_interior_deregister(tsdn_t *tsdn, rtree_ctx_t *rtree_ctx,
}
}
/*
* Removes all pointers to the given extent from the global rtree.
*/
static void
extent_deregister(tsdn_t *tsdn, extent_t *extent) {
extent_deregister_impl(tsdn_t *tsdn, extent_t *extent, bool gdump) {
rtree_ctx_t rtree_ctx_fallback;
rtree_ctx_t *rtree_ctx = tsdn_rtree_ctx(tsdn, &rtree_ctx_fallback);
rtree_leaf_elm_t *elm_a, *elm_b;
@ -755,16 +825,30 @@ extent_deregister(tsdn_t *tsdn, extent_t *extent) {
extent_unlock(tsdn, extent);
if (config_prof) {
if (config_prof && gdump) {
extent_gdump_sub(tsdn, extent);
}
}
static void
extent_deregister(tsdn_t *tsdn, extent_t *extent) {
extent_deregister_impl(tsdn, extent, true);
}
static void
extent_deregister_no_gdump_sub(tsdn_t *tsdn, extent_t *extent) {
extent_deregister_impl(tsdn, extent, false);
}
/*
* Tries to find and remove an extent from extents that can be used for the
* given allocation request.
*/
static extent_t *
extent_recycle_extract(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, rtree_ctx_t *rtree_ctx, extents_t *extents,
void *new_addr, size_t size, size_t pad, size_t alignment, bool slab,
bool *zero, bool *commit, bool growing_retained) {
bool growing_retained) {
witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
WITNESS_RANK_CORE, growing_retained ? 1 : 0);
assert(alignment > 0);
@ -786,11 +870,6 @@ extent_recycle_extract(tsdn_t *tsdn, arena_t *arena,
}
size_t esize = size + pad;
size_t alloc_size = esize + PAGE_CEILING(alignment) - PAGE;
/* Beware size_t wrap-around. */
if (alloc_size < esize) {
return NULL;
}
malloc_mutex_lock(tsdn, &extents->mtx);
extent_hooks_assure_initialized(arena, r_extent_hooks);
extent_t *extent;
@ -812,86 +891,172 @@ extent_recycle_extract(tsdn_t *tsdn, arena_t *arena,
extent_unlock(tsdn, unlock_extent);
}
} else {
extent = extents_fit_locked(tsdn, arena, extents, alloc_size);
extent = extents_fit_locked(tsdn, arena, extents, esize,
alignment);
}
if (extent == NULL) {
malloc_mutex_unlock(tsdn, &extents->mtx);
return NULL;
}
extent_activate_locked(tsdn, arena, extents, extent, false);
extent_activate_locked(tsdn, arena, extents, extent);
malloc_mutex_unlock(tsdn, &extents->mtx);
if (extent_zeroed_get(extent)) {
*zero = true;
}
if (extent_committed_get(extent)) {
*commit = true;
}
return extent;
}
static extent_t *
extent_recycle_split(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, rtree_ctx_t *rtree_ctx, extents_t *extents,
/*
* Given an allocation request and an extent guaranteed to be able to satisfy
* it, this splits off lead and trail extents, leaving extent pointing to an
* extent satisfying the allocation.
* This function doesn't put lead or trail into any extents_t; it's the caller's
* job to ensure that they can be reused.
*/
typedef enum {
/*
* Split successfully. lead, extent, and trail, are modified to extents
* describing the ranges before, in, and after the given allocation.
*/
extent_split_interior_ok,
/*
* The extent can't satisfy the given allocation request. None of the
* input extent_t *s are touched.
*/
extent_split_interior_cant_alloc,
/*
* In a potentially invalid state. Must leak (if *to_leak is non-NULL),
* and salvage what's still salvageable (if *to_salvage is non-NULL).
* None of lead, extent, or trail are valid.
*/
extent_split_interior_error
} extent_split_interior_result_t;
static extent_split_interior_result_t
extent_split_interior(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, rtree_ctx_t *rtree_ctx,
/* The result of splitting, in case of success. */
extent_t **extent, extent_t **lead, extent_t **trail,
/* The mess to clean up, in case of error. */
extent_t **to_leak, extent_t **to_salvage,
void *new_addr, size_t size, size_t pad, size_t alignment, bool slab,
szind_t szind, extent_t *extent, bool growing_retained) {
szind_t szind, bool growing_retained) {
size_t esize = size + pad;
size_t leadsize = ALIGNMENT_CEILING((uintptr_t)extent_base_get(extent),
PAGE_CEILING(alignment)) - (uintptr_t)extent_base_get(extent);
size_t leadsize = ALIGNMENT_CEILING((uintptr_t)extent_base_get(*extent),
PAGE_CEILING(alignment)) - (uintptr_t)extent_base_get(*extent);
assert(new_addr == NULL || leadsize == 0);
assert(extent_size_get(extent) >= leadsize + esize);
size_t trailsize = extent_size_get(extent) - leadsize - esize;
if (extent_size_get(*extent) < leadsize + esize) {
return extent_split_interior_cant_alloc;
}
size_t trailsize = extent_size_get(*extent) - leadsize - esize;
*lead = NULL;
*trail = NULL;
*to_leak = NULL;
*to_salvage = NULL;
/* Split the lead. */
if (leadsize != 0) {
extent_t *lead = extent;
extent = extent_split_impl(tsdn, arena, r_extent_hooks,
lead, leadsize, NSIZES, false, esize + trailsize, szind,
*lead = *extent;
*extent = extent_split_impl(tsdn, arena, r_extent_hooks,
*lead, leadsize, NSIZES, false, esize + trailsize, szind,
slab, growing_retained);
if (extent == NULL) {
extent_deregister(tsdn, lead);
extents_leak(tsdn, arena, r_extent_hooks, extents,
lead, growing_retained);
return NULL;
if (*extent == NULL) {
*to_leak = *lead;
*lead = NULL;
return extent_split_interior_error;
}
extent_deactivate(tsdn, arena, extents, lead, false);
}
/* Split the trail. */
if (trailsize != 0) {
extent_t *trail = extent_split_impl(tsdn, arena,
r_extent_hooks, extent, esize, szind, slab, trailsize,
NSIZES, false, growing_retained);
if (trail == NULL) {
extent_deregister(tsdn, extent);
extents_leak(tsdn, arena, r_extent_hooks, extents,
extent, growing_retained);
return NULL;
*trail = extent_split_impl(tsdn, arena, r_extent_hooks, *extent,
esize, szind, slab, trailsize, NSIZES, false,
growing_retained);
if (*trail == NULL) {
*to_leak = *extent;
*to_salvage = *lead;
*lead = NULL;
*extent = NULL;
return extent_split_interior_error;
}
extent_deactivate(tsdn, arena, extents, trail, false);
} else if (leadsize == 0) {
}
if (leadsize == 0 && trailsize == 0) {
/*
* Splitting causes szind to be set as a side effect, but no
* splitting occurred.
*/
extent_szind_set(extent, szind);
extent_szind_set(*extent, szind);
if (szind != NSIZES) {
rtree_szind_slab_update(tsdn, &extents_rtree, rtree_ctx,
(uintptr_t)extent_addr_get(extent), szind, slab);
if (slab && extent_size_get(extent) > PAGE) {
(uintptr_t)extent_addr_get(*extent), szind, slab);
if (slab && extent_size_get(*extent) > PAGE) {
rtree_szind_slab_update(tsdn, &extents_rtree,
rtree_ctx,
(uintptr_t)extent_past_get(extent) -
(uintptr_t)extent_past_get(*extent) -
(uintptr_t)PAGE, szind, slab);
}
}
}
return extent;
return extent_split_interior_ok;
}
/*
* This fulfills the indicated allocation request out of the given extent (which
* the caller should have ensured was big enough). If there's any unused space
* before or after the resulting allocation, that space is given its own extent
* and put back into extents.
*/
static extent_t *
extent_recycle_split(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, rtree_ctx_t *rtree_ctx, extents_t *extents,
void *new_addr, size_t size, size_t pad, size_t alignment, bool slab,
szind_t szind, extent_t *extent, bool growing_retained) {
extent_t *lead;
extent_t *trail;
extent_t *to_leak;
extent_t *to_salvage;
extent_split_interior_result_t result = extent_split_interior(
tsdn, arena, r_extent_hooks, rtree_ctx, &extent, &lead, &trail,
&to_leak, &to_salvage, new_addr, size, pad, alignment, slab, szind,
growing_retained);
if (result == extent_split_interior_ok) {
if (lead != NULL) {
extent_deactivate(tsdn, arena, extents, lead);
}
if (trail != NULL) {
extent_deactivate(tsdn, arena, extents, trail);
}
return extent;
} else {
/*
* We should have picked an extent that was large enough to
* fulfill our allocation request.
*/
assert(result == extent_split_interior_error);
if (to_salvage != NULL) {
extent_deregister(tsdn, to_salvage);
}
if (to_leak != NULL) {
void *leak = extent_base_get(to_leak);
extent_deregister_no_gdump_sub(tsdn, to_leak);
extents_leak(tsdn, arena, r_extent_hooks, extents,
to_leak, growing_retained);
assert(extent_lock_from_addr(tsdn, rtree_ctx, leak)
== NULL);
}
return NULL;
}
unreachable();
}
/*
* Tries to satisfy the given allocation request by reusing one of the extents
* in the given extents_t.
*/
static extent_t *
extent_recycle(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
extents_t *extents, void *new_addr, size_t size, size_t pad,
@ -906,16 +1071,12 @@ extent_recycle(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
rtree_ctx_t rtree_ctx_fallback;
rtree_ctx_t *rtree_ctx = tsdn_rtree_ctx(tsdn, &rtree_ctx_fallback);
bool committed = false;
extent_t *extent = extent_recycle_extract(tsdn, arena, r_extent_hooks,
rtree_ctx, extents, new_addr, size, pad, alignment, slab, zero,
&committed, growing_retained);
rtree_ctx, extents, new_addr, size, pad, alignment, slab,
growing_retained);
if (extent == NULL) {
return NULL;
}
if (committed) {
*commit = true;
}
extent = extent_recycle_split(tsdn, arena, r_extent_hooks, rtree_ctx,
extents, new_addr, size, pad, alignment, slab, szind, extent,
@ -934,6 +1095,13 @@ extent_recycle(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
extent_zeroed_set(extent, true);
}
if (extent_committed_get(extent)) {
*commit = true;
}
if (extent_zeroed_get(extent)) {
*zero = true;
}
if (pad != 0) {
extent_addr_randomize(tsdn, extent, alignment);
}
@ -999,11 +1167,12 @@ extent_alloc_core(tsdn_t *tsdn, arena_t *arena, void *new_addr, size_t size,
static void *
extent_alloc_default_impl(tsdn_t *tsdn, arena_t *arena, void *new_addr,
size_t size, size_t alignment, bool *zero, bool *commit) {
void *ret;
ret = extent_alloc_core(tsdn, arena, new_addr, size, alignment, zero,
void *ret = extent_alloc_core(tsdn, arena, new_addr, size, alignment, zero,
commit, (dss_prec_t)atomic_load_u(&arena->dss_prec,
ATOMIC_RELAXED));
if (have_madvise_huge && ret) {
pages_set_thp_state(ret, size);
}
return ret;
}
@ -1028,7 +1197,18 @@ extent_alloc_default(extent_hooks_t *extent_hooks, void *new_addr, size_t size,
static void
extent_hook_pre_reentrancy(tsdn_t *tsdn, arena_t *arena) {
tsd_t *tsd = tsdn_null(tsdn) ? tsd_fetch() : tsdn_tsd(tsdn);
if (arena == arena_get(tsd_tsdn(tsd), 0, false)) {
/*
* The only legitimate case of customized extent hooks for a0 is
* hooks with no allocation activities. One such example is to
* place metadata on pre-allocated resources such as huge pages.
* In that case, rely on reentrancy_level checks to catch
* infinite recursions.
*/
pre_reentrancy(tsd, NULL);
} else {
pre_reentrancy(tsd, arena);
}
}
static void
@ -1081,9 +1261,8 @@ extent_grow_retained(tsdn_t *tsdn, arena_t *arena,
void *ptr;
if (*r_extent_hooks == &extent_hooks_default) {
ptr = extent_alloc_core(tsdn, arena, NULL, alloc_size, PAGE,
&zeroed, &committed, (dss_prec_t)atomic_load_u(
&arena->dss_prec, ATOMIC_RELAXED));
ptr = extent_alloc_default_impl(tsdn, arena, NULL,
alloc_size, PAGE, &zeroed, &committed);
} else {
extent_hook_pre_reentrancy(tsdn, arena);
ptr = (*r_extent_hooks)->alloc(*r_extent_hooks, NULL,
@ -1094,21 +1273,18 @@ extent_grow_retained(tsdn_t *tsdn, arena_t *arena,
extent_init(extent, arena, ptr, alloc_size, false, NSIZES,
arena_extent_sn_next(arena), extent_state_active, zeroed,
committed);
committed, true);
if (ptr == NULL) {
extent_dalloc(tsdn, arena, extent);
goto label_err;
}
if (extent_register_no_gdump_add(tsdn, extent)) {
extents_leak(tsdn, arena, r_extent_hooks,
&arena->extents_retained, extent, true);
goto label_err;
}
size_t leadsize = ALIGNMENT_CEILING((uintptr_t)ptr,
PAGE_CEILING(alignment)) - (uintptr_t)ptr;
assert(alloc_size >= leadsize + esize);
size_t trailsize = alloc_size - leadsize - esize;
if (extent_zeroed_get(extent) && extent_committed_get(extent)) {
*zero = true;
}
@ -1116,54 +1292,46 @@ extent_grow_retained(tsdn_t *tsdn, arena_t *arena,
*commit = true;
}
/* Split the lead. */
if (leadsize != 0) {
extent_t *lead = extent;
extent = extent_split_impl(tsdn, arena, r_extent_hooks, lead,
leadsize, NSIZES, false, esize + trailsize, szind, slab,
rtree_ctx_t rtree_ctx_fallback;
rtree_ctx_t *rtree_ctx = tsdn_rtree_ctx(tsdn, &rtree_ctx_fallback);
extent_t *lead;
extent_t *trail;
extent_t *to_leak;
extent_t *to_salvage;
extent_split_interior_result_t result = extent_split_interior(
tsdn, arena, r_extent_hooks, rtree_ctx, &extent, &lead, &trail,
&to_leak, &to_salvage, NULL, size, pad, alignment, slab, szind,
true);
if (extent == NULL) {
extent_deregister(tsdn, lead);
extents_leak(tsdn, arena, r_extent_hooks,
&arena->extents_retained, lead, true);
goto label_err;
}
if (result == extent_split_interior_ok) {
if (lead != NULL) {
extent_record(tsdn, arena, r_extent_hooks,
&arena->extents_retained, lead, true);
}
/* Split the trail. */
if (trailsize != 0) {
extent_t *trail = extent_split_impl(tsdn, arena, r_extent_hooks,
extent, esize, szind, slab, trailsize, NSIZES, false, true);
if (trail == NULL) {
extent_deregister(tsdn, extent);
extents_leak(tsdn, arena, r_extent_hooks,
&arena->extents_retained, extent, true);
goto label_err;
}
if (trail != NULL) {
extent_record(tsdn, arena, r_extent_hooks,
&arena->extents_retained, trail, true);
} else if (leadsize == 0) {
}
} else {
/*
* Splitting causes szind to be set as a side effect, but no
* splitting occurred.
* We should have allocated a sufficiently large extent; the
* cant_alloc case should not occur.
*/
rtree_ctx_t rtree_ctx_fallback;
rtree_ctx_t *rtree_ctx = tsdn_rtree_ctx(tsdn,
&rtree_ctx_fallback);
extent_szind_set(extent, szind);
if (szind != NSIZES) {
rtree_szind_slab_update(tsdn, &extents_rtree, rtree_ctx,
(uintptr_t)extent_addr_get(extent), szind, slab);
if (slab && extent_size_get(extent) > PAGE) {
rtree_szind_slab_update(tsdn, &extents_rtree,
rtree_ctx,
(uintptr_t)extent_past_get(extent) -
(uintptr_t)PAGE, szind, slab);
assert(result == extent_split_interior_error);
if (to_salvage != NULL) {
if (config_prof) {
extent_gdump_add(tsdn, to_salvage);
}
extent_record(tsdn, arena, r_extent_hooks,
&arena->extents_retained, to_salvage, true);
}
if (to_leak != NULL) {
extent_deregister_no_gdump_sub(tsdn, to_leak);
extents_leak(tsdn, arena, r_extent_hooks,
&arena->extents_retained, to_leak, true);
}
goto label_err;
}
if (*commit && !extent_committed_get(extent)) {
@ -1177,13 +1345,14 @@ extent_grow_retained(tsdn_t *tsdn, arena_t *arena,
}
/*
* Increment extent_grow_next if doing so wouldn't exceed the legal
* Increment extent_grow_next if doing so wouldn't exceed the allowed
* range.
*/
if (arena->extent_grow_next + egn_skip + 1 < NPSIZES) {
if (arena->extent_grow_next + egn_skip + 1 <=
arena->retain_grow_limit) {
arena->extent_grow_next += egn_skip + 1;
} else {
arena->extent_grow_next = NPSIZES - 1;
arena->extent_grow_next = arena->retain_grow_limit;
}
/* All opportunities for failure are past. */
malloc_mutex_unlock(tsdn, &arena->extent_grow_mtx);
@ -1271,7 +1440,8 @@ extent_alloc_wrapper_hard(tsdn_t *tsdn, arena_t *arena,
return NULL;
}
extent_init(extent, arena, addr, esize, slab, szind,
arena_extent_sn_next(arena), extent_state_active, zero, commit);
arena_extent_sn_next(arena), extent_state_active, *zero, *commit,
true);
if (pad != 0) {
extent_addr_randomize(tsdn, extent, alignment);
}
@ -1296,10 +1466,20 @@ extent_alloc_wrapper(tsdn_t *tsdn, arena_t *arena,
extent_t *extent = extent_alloc_retained(tsdn, arena, r_extent_hooks,
new_addr, size, pad, alignment, slab, szind, zero, commit);
if (extent == NULL) {
if (opt_retain && new_addr != NULL) {
/*
* When retain is enabled and new_addr is set, we do not
* attempt extent_alloc_wrapper_hard which does mmap
* that is very unlikely to succeed (unless it happens
* to be at the end).
*/
return NULL;
}
extent = extent_alloc_wrapper_hard(tsdn, arena, r_extent_hooks,
new_addr, size, pad, alignment, slab, szind, zero, commit);
}
assert(extent == NULL || extent_dumpable_get(extent));
return extent;
}
@ -1329,16 +1509,7 @@ extent_coalesce(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
bool growing_retained) {
assert(extent_can_coalesce(arena, extents, inner, outer));
if (forward && extents->delay_coalesce) {
/*
* The extent that remains after coalescing must occupy the
* outer extent's position in the LRU. For forward coalescing,
* swap the inner extent into the LRU.
*/
extent_list_replace(&extents->lru, outer, inner);
}
extent_activate_locked(tsdn, arena, extents, outer,
extents->delay_coalesce);
extent_activate_locked(tsdn, arena, extents, outer);
malloc_mutex_unlock(tsdn, &extents->mtx);
bool err = extent_merge_impl(tsdn, arena, r_extent_hooks,
@ -1346,11 +1517,7 @@ extent_coalesce(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
malloc_mutex_lock(tsdn, &extents->mtx);
if (err) {
if (forward && extents->delay_coalesce) {
extent_list_replace(&extents->lru, inner, outer);
}
extent_deactivate_locked(tsdn, arena, extents, outer,
extents->delay_coalesce);
extent_deactivate_locked(tsdn, arena, extents, outer);
}
return err;
@ -1422,6 +1589,10 @@ extent_try_coalesce(tsdn_t *tsdn, arena_t *arena,
return extent;
}
/*
* Does the metadata management portions of putting an unused extent into the
* given extents_t (coalesces, deregisters slab interiors, the heap operations).
*/
static void
extent_record(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
extents_t *extents, extent_t *extent, bool growing_retained) {
@ -1447,9 +1618,20 @@ extent_record(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
if (!extents->delay_coalesce) {
extent = extent_try_coalesce(tsdn, arena, r_extent_hooks,
rtree_ctx, extents, extent, NULL, growing_retained);
} else if (extent_size_get(extent) >= LARGE_MINCLASS) {
/* Always coalesce large extents eagerly. */
bool coalesced;
size_t prev_size;
do {
prev_size = extent_size_get(extent);
assert(extent_state_get(extent) == extent_state_active);
extent = extent_try_coalesce(tsdn, arena,
r_extent_hooks, rtree_ctx, extents, extent,
&coalesced, growing_retained);
} while (coalesced &&
extent_size_get(extent) >= prev_size + LARGE_MINCLASS);
}
extent_deactivate_locked(tsdn, arena, extents, extent, false);
extent_deactivate_locked(tsdn, arena, extents, extent);
malloc_mutex_unlock(tsdn, &extents->mtx);
}
@ -1520,6 +1702,7 @@ extent_dalloc_wrapper_try(tsdn_t *tsdn, arena_t *arena,
void
extent_dalloc_wrapper(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, extent_t *extent) {
assert(extent_dumpable_get(extent));
witness_assert_depth_to_rank(tsdn_witness_tsdp_get(tsdn),
WITNESS_RANK_CORE, 0);
@ -1780,6 +1963,13 @@ extent_split_default(extent_hooks_t *extent_hooks, void *addr, size_t size,
}
#endif
/*
* Accepts the extent to split, and the characteristics of each side of the
* split. The 'a' parameters go with the 'lead' of the resulting pair of
* extents (the lower addressed portion of the split), and the 'b' parameters go
* with the trail (the higher addressed portion). This makes 'extent' the lead,
* and returns the trail (except in case of error).
*/
static extent_t *
extent_split_impl(tsdn_t *tsdn, arena_t *arena,
extent_hooks_t **r_extent_hooks, extent_t *extent, size_t size_a,
@ -1803,7 +1993,7 @@ extent_split_impl(tsdn_t *tsdn, arena_t *arena,
extent_init(trail, arena, (void *)((uintptr_t)extent_base_get(extent) +
size_a), size_b, slab_b, szind_b, extent_sn_get(extent),
extent_state_get(extent), extent_zeroed_get(extent),
extent_committed_get(extent));
extent_committed_get(extent), extent_dumpable_get(extent));
rtree_ctx_t rtree_ctx_fallback;
rtree_ctx_t *rtree_ctx = tsdn_rtree_ctx(tsdn, &rtree_ctx_fallback);
@ -1814,7 +2004,7 @@ extent_split_impl(tsdn_t *tsdn, arena_t *arena,
extent_init(&lead, arena, extent_addr_get(extent), size_a,
slab_a, szind_a, extent_sn_get(extent),
extent_state_get(extent), extent_zeroed_get(extent),
extent_committed_get(extent));
extent_committed_get(extent), extent_dumpable_get(extent));
extent_rtree_leaf_elms_lookup(tsdn, rtree_ctx, &lead, false,
true, &lead_elm_a, &lead_elm_b);

5
src/extent_dss.c
View File

@ -156,7 +156,7 @@ extent_alloc_dss(tsdn_t *tsdn, arena_t *arena, void *new_addr, size_t size,
extent_init(gap, arena, gap_addr_page,
gap_size_page, false, NSIZES,
arena_extent_sn_next(arena),
extent_state_active, false, true);
extent_state_active, false, true, true);
}
/*
* Compute the address just past the end of the desired
@ -199,7 +199,8 @@ extent_alloc_dss(tsdn_t *tsdn, arena_t *arena, void *new_addr, size_t size,
extent_init(&extent, arena, ret, size,
size, false, NSIZES,
extent_state_active, false, true);
extent_state_active, false, true,
true);
if (extent_purge_forced_wrapper(tsdn,
arena, &extent_hooks, &extent, 0,
size)) {

198
src/jemalloc.c
View File

@ -8,6 +8,7 @@
#include "jemalloc/internal/extent_dss.h"
#include "jemalloc/internal/extent_mmap.h"
#include "jemalloc/internal/jemalloc_internal_types.h"
#include "jemalloc/internal/log.h"
#include "jemalloc/internal/malloc_io.h"
#include "jemalloc/internal/mutex.h"
#include "jemalloc/internal/rtree.h"
@ -848,10 +849,8 @@ malloc_conf_error(const char *msg, const char *k, size_t klen, const char *v,
size_t vlen) {
malloc_printf("<jemalloc>: %s: %.*s:%.*s\n", msg, (int)klen, k,
(int)vlen, v);
/* If abort_conf is set, error out after processing all options. */
had_conf_error = true;
if (opt_abort_conf) {
malloc_abort_invalid_conf();
}
}
static void
@ -1051,8 +1050,22 @@ malloc_conf_init(void) {
CONF_HANDLE_BOOL(opt_abort, "abort")
CONF_HANDLE_BOOL(opt_abort_conf, "abort_conf")
if (opt_abort_conf && had_conf_error) {
malloc_abort_invalid_conf();
if (strncmp("metadata_thp", k, klen) == 0) {
int i;
bool match = false;
for (i = 0; i < metadata_thp_mode_limit; i++) {
if (strncmp(metadata_thp_mode_names[i],
v, vlen) == 0) {
opt_metadata_thp = i;
match = true;
break;
}
}
if (!match) {
malloc_conf_error("Invalid conf value",
k, klen, v, vlen);
}
continue;
}
CONF_HANDLE_BOOL(opt_retain, "retain")
if (strncmp("dss", k, klen) == 0) {
@ -1128,12 +1141,14 @@ malloc_conf_init(void) {
CONF_HANDLE_BOOL(opt_xmalloc, "xmalloc")
}
CONF_HANDLE_BOOL(opt_tcache, "tcache")
CONF_HANDLE_SIZE_T(opt_lg_extent_max_active_fit,
"lg_extent_max_active_fit", 0,
(sizeof(size_t) << 3), yes, yes, false)
CONF_HANDLE_SSIZE_T(opt_lg_tcache_max, "lg_tcache_max",
-1, (sizeof(size_t) << 3) - 1)
if (strncmp("percpu_arena", k, klen) == 0) {
int i;
bool match = false;
for (i = percpu_arena_mode_names_base; i <
for (int i = percpu_arena_mode_names_base; i <
percpu_arena_mode_names_limit; i++) {
if (strncmp(percpu_arena_mode_names[i],
v, vlen) == 0) {
@ -1155,6 +1170,10 @@ malloc_conf_init(void) {
}
CONF_HANDLE_BOOL(opt_background_thread,
"background_thread");
CONF_HANDLE_SIZE_T(opt_max_background_threads,
"max_background_threads", 1,
opt_max_background_threads, yes, yes,
true);
if (config_prof) {
CONF_HANDLE_BOOL(opt_prof, "prof")
CONF_HANDLE_CHAR_P(opt_prof_prefix,
@ -1173,6 +1192,37 @@ malloc_conf_init(void) {
CONF_HANDLE_BOOL(opt_prof_final, "prof_final")
CONF_HANDLE_BOOL(opt_prof_leak, "prof_leak")
}
if (config_log) {
if (CONF_MATCH("log")) {
size_t cpylen = (
vlen <= sizeof(log_var_names) ?
vlen : sizeof(log_var_names) - 1);
strncpy(log_var_names, v, cpylen);
log_var_names[cpylen] = '\0';
continue;
}
}
if (CONF_MATCH("thp")) {
bool match = false;
for (int i = 0; i < thp_mode_names_limit; i++) {
if (strncmp(thp_mode_names[i],v, vlen)
== 0) {
if (!have_madvise_huge) {
malloc_conf_error(
"No THP support",
k, klen, v, vlen);
}
opt_thp = i;
match = true;
break;
}
}
if (!match) {
malloc_conf_error("Invalid conf value",
k, klen, v, vlen);
}
continue;
}
malloc_conf_error("Invalid conf pair", k, klen, v,
vlen);
#undef CONF_MATCH
@ -1188,7 +1238,11 @@ malloc_conf_init(void) {
#undef CONF_HANDLE_SSIZE_T
#undef CONF_HANDLE_CHAR_P
}
if (opt_abort_conf && had_conf_error) {
malloc_abort_invalid_conf();
}
}
atomic_store_b(&log_init_done, true, ATOMIC_RELEASE);
}
static bool
@ -1493,6 +1547,8 @@ malloc_init_hard(void) {
post_reentrancy(tsd);
malloc_mutex_unlock(tsd_tsdn(tsd), &init_lock);
witness_assert_lockless(witness_tsd_tsdn(
tsd_witness_tsdp_get_unsafe(tsd)));
malloc_tsd_boot1();
/* Update TSD after tsd_boot1. */
tsd = tsd_fetch();
@ -1500,8 +1556,11 @@ malloc_init_hard(void) {
assert(have_background_thread);
/*
* Need to finish init & unlock first before creating background
* threads (pthread_create depends on malloc).
* threads (pthread_create depends on malloc). ctl_init (which
* sets isthreaded) needs to be called without holding any lock.
*/
background_thread_ctl_init(tsd_tsdn(tsd));
malloc_mutex_lock(tsd_tsdn(tsd), &background_thread_lock);
bool err = background_thread_create(tsd, 0);
malloc_mutex_unlock(tsd_tsdn(tsd), &background_thread_lock);
@ -1701,7 +1760,7 @@ compute_size_with_overflow(bool may_overflow, dynamic_opts_t *dopts,
}
/* A size_t with its high-half bits all set to 1. */
const static size_t high_bits = SIZE_T_MAX << (sizeof(size_t) * 8 / 2);
static const size_t high_bits = SIZE_T_MAX << (sizeof(size_t) * 8 / 2);
*size = dopts->item_size * dopts->num_items;
@ -1962,6 +2021,8 @@ je_malloc(size_t size) {
static_opts_t sopts;
dynamic_opts_t dopts;
LOG("core.malloc.entry", "size: %zu", size);
static_opts_init(&sopts);
dynamic_opts_init(&dopts);
@ -1976,6 +2037,8 @@ je_malloc(size_t size) {
imalloc(&sopts, &dopts);
LOG("core.malloc.exit", "result: %p", ret);
return ret;
}
@ -1986,6 +2049,9 @@ je_posix_memalign(void **memptr, size_t alignment, size_t size) {
static_opts_t sopts;
dynamic_opts_t dopts;
LOG("core.posix_memalign.entry", "mem ptr: %p, alignment: %zu, "
"size: %zu", memptr, alignment, size);
static_opts_init(&sopts);
dynamic_opts_init(&dopts);
@ -2002,6 +2068,10 @@ je_posix_memalign(void **memptr, size_t alignment, size_t size) {
dopts.alignment = alignment;
ret = imalloc(&sopts, &dopts);
LOG("core.posix_memalign.exit", "result: %d, alloc ptr: %p", ret,
*memptr);
return ret;
}
@ -2014,6 +2084,9 @@ je_aligned_alloc(size_t alignment, size_t size) {
static_opts_t sopts;
dynamic_opts_t dopts;
LOG("core.aligned_alloc.entry", "alignment: %zu, size: %zu\n",
alignment, size);
static_opts_init(&sopts);
dynamic_opts_init(&dopts);
@ -2032,6 +2105,9 @@ je_aligned_alloc(size_t alignment, size_t size) {
dopts.alignment = alignment;
imalloc(&sopts, &dopts);
LOG("core.aligned_alloc.exit", "result: %p", ret);
return ret;
}
@ -2043,6 +2119,8 @@ je_calloc(size_t num, size_t size) {
static_opts_t sopts;
dynamic_opts_t dopts;
LOG("core.calloc.entry", "num: %zu, size: %zu\n", num, size);
static_opts_init(&sopts);
dynamic_opts_init(&dopts);
@ -2059,6 +2137,8 @@ je_calloc(size_t num, size_t size) {
imalloc(&sopts, &dopts);
LOG("core.calloc.exit", "result: %p", ret);
return ret;
}
@ -2161,17 +2241,37 @@ isfree(tsd_t *tsd, void *ptr, size_t usize, tcache_t *tcache, bool slow_path) {
assert(malloc_initialized() || IS_INITIALIZER);
alloc_ctx_t alloc_ctx, *ctx;
if (config_prof && opt_prof) {
if (!config_cache_oblivious && ((uintptr_t)ptr & PAGE_MASK) != 0) {
/*
* When cache_oblivious is disabled and ptr is not page aligned,
* the allocation was not sampled -- usize can be used to
* determine szind directly.
*/
alloc_ctx.szind = sz_size2index(usize);
alloc_ctx.slab = true;
ctx = &alloc_ctx;
if (config_debug) {
alloc_ctx_t dbg_ctx;
rtree_ctx_t *rtree_ctx = tsd_rtree_ctx(tsd);
rtree_szind_slab_read(tsd_tsdn(tsd), &extents_rtree,
rtree_ctx, (uintptr_t)ptr, true, &dbg_ctx.szind,
&dbg_ctx.slab);
assert(dbg_ctx.szind == alloc_ctx.szind);
assert(dbg_ctx.slab == alloc_ctx.slab);
}
} else if (config_prof && opt_prof) {
rtree_ctx_t *rtree_ctx = tsd_rtree_ctx(tsd);
rtree_szind_slab_read(tsd_tsdn(tsd), &extents_rtree, rtree_ctx,
(uintptr_t)ptr, true, &alloc_ctx.szind, &alloc_ctx.slab);
assert(alloc_ctx.szind == sz_size2index(usize));
ctx = &alloc_ctx;
prof_free(tsd, ptr, usize, ctx);
} else {
ctx = NULL;
}
if (config_prof && opt_prof) {
prof_free(tsd, ptr, usize, ctx);
}
if (config_stats) {
*tsd_thread_deallocatedp_get(tsd) += usize;
}
@ -2192,6 +2292,8 @@ je_realloc(void *ptr, size_t size) {
size_t usize JEMALLOC_CC_SILENCE_INIT(0);
size_t old_usize = 0;
LOG("core.realloc.entry", "ptr: %p, size: %zu\n", ptr, size);
if (unlikely(size == 0)) {
if (ptr != NULL) {
/* realloc(ptr, 0) is equivalent to free(ptr). */
@ -2204,6 +2306,8 @@ je_realloc(void *ptr, size_t size) {
tcache = NULL;
}
ifree(tsd, ptr, tcache, true);
LOG("core.realloc.exit", "result: %p", NULL);
return NULL;
}
size = 1;
@ -2236,7 +2340,9 @@ je_realloc(void *ptr, size_t size) {
tsdn = tsd_tsdn(tsd);
} else {
/* realloc(NULL, size) is equivalent to malloc(size). */
return je_malloc(size);
void *ret = je_malloc(size);
LOG("core.realloc.exit", "result: %p", ret);
return ret;
}
if (unlikely(ret == NULL)) {
@ -2257,11 +2363,15 @@ je_realloc(void *ptr, size_t size) {
}
UTRACE(ptr, size, ret);
check_entry_exit_locking(tsdn);
LOG("core.realloc.exit", "result: %p", ret);
return ret;
}
JEMALLOC_EXPORT void JEMALLOC_NOTHROW
je_free(void *ptr) {
LOG("core.free.entry", "ptr: %p", ptr);
UTRACE(ptr, 0, 0);
if (likely(ptr != NULL)) {
/*
@ -2291,6 +2401,7 @@ je_free(void *ptr) {
}
check_entry_exit_locking(tsd_tsdn(tsd));
}
LOG("core.free.exit", "");
}
/*
@ -2310,6 +2421,9 @@ je_memalign(size_t alignment, size_t size) {
static_opts_t sopts;
dynamic_opts_t dopts;
LOG("core.memalign.entry", "alignment: %zu, size: %zu\n", alignment,
size);
static_opts_init(&sopts);
dynamic_opts_init(&dopts);
@ -2327,6 +2441,8 @@ je_memalign(size_t alignment, size_t size) {
dopts.alignment = alignment;
imalloc(&sopts, &dopts);
LOG("core.memalign.exit", "result: %p", ret);
return ret;
}
#endif
@ -2341,6 +2457,8 @@ je_valloc(size_t size) {
static_opts_t sopts;
dynamic_opts_t dopts;
LOG("core.valloc.entry", "size: %zu\n", size);
static_opts_init(&sopts);
dynamic_opts_init(&dopts);
@ -2359,6 +2477,7 @@ je_valloc(size_t size) {
imalloc(&sopts, &dopts);
LOG("core.valloc.exit", "result: %p\n", ret);
return ret;
}
#endif
@ -2432,6 +2551,8 @@ je_mallocx(size_t size, int flags) {
static_opts_t sopts;
dynamic_opts_t dopts;
LOG("core.mallocx.entry", "size: %zu, flags: %d", size, flags);
static_opts_init(&sopts);
dynamic_opts_init(&dopts);
@ -2465,6 +2586,8 @@ je_mallocx(size_t size, int flags) {
}
imalloc(&sopts, &dopts);
LOG("core.mallocx.exit", "result: %p", ret);
return ret;
}
@ -2545,6 +2668,10 @@ je_rallocx(void *ptr, size_t size, int flags) {
arena_t *arena;
tcache_t *tcache;
LOG("core.rallocx.entry", "ptr: %p, size: %zu, flags: %d", ptr,
size, flags);
assert(ptr != NULL);
assert(size != 0);
assert(malloc_initialized() || IS_INITIALIZER);
@ -2607,6 +2734,8 @@ je_rallocx(void *ptr, size_t size, int flags) {
}
UTRACE(ptr, size, p);
check_entry_exit_locking(tsd_tsdn(tsd));
LOG("core.rallocx.exit", "result: %p", p);
return p;
label_oom:
if (config_xmalloc && unlikely(opt_xmalloc)) {
@ -2615,6 +2744,8 @@ label_oom:
}
UTRACE(ptr, size, 0);
check_entry_exit_locking(tsd_tsdn(tsd));
LOG("core.rallocx.exit", "result: %p", NULL);
return NULL;
}
@ -2701,6 +2832,9 @@ je_xallocx(void *ptr, size_t size, size_t extra, int flags) {
size_t alignment = MALLOCX_ALIGN_GET(flags);
bool zero = flags & MALLOCX_ZERO;
LOG("core.xallocx.entry", "ptr: %p, size: %zu, extra: %zu, "
"flags: %d", ptr, size, extra, flags);
assert(ptr != NULL);
assert(size != 0);
assert(SIZE_T_MAX - size >= extra);
@ -2750,15 +2884,19 @@ je_xallocx(void *ptr, size_t size, size_t extra, int flags) {
label_not_resized:
UTRACE(ptr, size, ptr);
check_entry_exit_locking(tsd_tsdn(tsd));
LOG("core.xallocx.exit", "result: %zu", usize);
return usize;
}
JEMALLOC_EXPORT size_t JEMALLOC_NOTHROW
JEMALLOC_ATTR(pure)
je_sallocx(const void *ptr, int flags) {
je_sallocx(const void *ptr, UNUSED int flags) {
size_t usize;
tsdn_t *tsdn;
LOG("core.sallocx.entry", "ptr: %p, flags: %d", ptr, flags);
assert(malloc_initialized() || IS_INITIALIZER);
assert(ptr != NULL);
@ -2773,11 +2911,15 @@ je_sallocx(const void *ptr, int flags) {
}
check_entry_exit_locking(tsdn);
LOG("core.sallocx.exit", "result: %zu", usize);
return usize;
}
JEMALLOC_EXPORT void JEMALLOC_NOTHROW
je_dallocx(void *ptr, int flags) {
LOG("core.dallocx.entry", "ptr: %p, flags: %d", ptr, flags);
assert(ptr != NULL);
assert(malloc_initialized() || IS_INITIALIZER);
@ -2815,6 +2957,8 @@ je_dallocx(void *ptr, int flags) {
ifree(tsd, ptr, tcache, true);
}
check_entry_exit_locking(tsd_tsdn(tsd));
LOG("core.dallocx.exit", "");
}
JEMALLOC_ALWAYS_INLINE size_t
@ -2836,6 +2980,9 @@ je_sdallocx(void *ptr, size_t size, int flags) {
assert(ptr != NULL);
assert(malloc_initialized() || IS_INITIALIZER);
LOG("core.sdallocx.entry", "ptr: %p, size: %zu, flags: %d", ptr,
size, flags);
tsd_t *tsd = tsd_fetch();
bool fast = tsd_fast(tsd);
size_t usize = inallocx(tsd_tsdn(tsd), size, flags);
@ -2872,6 +3019,8 @@ je_sdallocx(void *ptr, size_t size, int flags) {
isfree(tsd, ptr, usize, tcache, true);
}
check_entry_exit_locking(tsd_tsdn(tsd));
LOG("core.sdallocx.exit", "");
}
JEMALLOC_EXPORT size_t JEMALLOC_NOTHROW
@ -2883,6 +3032,7 @@ je_nallocx(size_t size, int flags) {
assert(size != 0);
if (unlikely(malloc_init())) {
LOG("core.nallocx.exit", "result: %zu", ZU(0));
return 0;
}
@ -2891,10 +3041,12 @@ je_nallocx(size_t size, int flags) {
usize = inallocx(tsdn, size, flags);
if (unlikely(usize > LARGE_MAXCLASS)) {
LOG("core.nallocx.exit", "result: %zu", ZU(0));
return 0;
}
check_entry_exit_locking(tsdn);
LOG("core.nallocx.exit", "result: %zu", usize);
return usize;
}
@ -2904,7 +3056,10 @@ je_mallctl(const char *name, void *oldp, size_t *oldlenp, void *newp,
int ret;
tsd_t *tsd;
LOG("core.mallctl.entry", "name: %s", name);
if (unlikely(malloc_init())) {
LOG("core.mallctl.exit", "result: %d", EAGAIN);
return EAGAIN;
}
@ -2912,6 +3067,8 @@ je_mallctl(const char *name, void *oldp, size_t *oldlenp, void *newp,
check_entry_exit_locking(tsd_tsdn(tsd));
ret = ctl_byname(tsd, name, oldp, oldlenp, newp, newlen);
check_entry_exit_locking(tsd_tsdn(tsd));
LOG("core.mallctl.exit", "result: %d", ret);
return ret;
}
@ -2919,7 +3076,10 @@ JEMALLOC_EXPORT int JEMALLOC_NOTHROW
je_mallctlnametomib(const char *name, size_t *mibp, size_t *miblenp) {
int ret;
LOG("core.mallctlnametomib.entry", "name: %s", name);
if (unlikely(malloc_init())) {
LOG("core.mallctlnametomib.exit", "result: %d", EAGAIN);
return EAGAIN;
}
@ -2927,6 +3087,8 @@ je_mallctlnametomib(const char *name, size_t *mibp, size_t *miblenp) {
check_entry_exit_locking(tsd_tsdn(tsd));
ret = ctl_nametomib(tsd, name, mibp, miblenp);
check_entry_exit_locking(tsd_tsdn(tsd));
LOG("core.mallctlnametomib.exit", "result: %d", ret);
return ret;
}
@ -2936,7 +3098,10 @@ je_mallctlbymib(const size_t *mib, size_t miblen, void *oldp, size_t *oldlenp,
int ret;
tsd_t *tsd;
LOG("core.mallctlbymib.entry", "");
if (unlikely(malloc_init())) {
LOG("core.mallctlbymib.exit", "result: %d", EAGAIN);
return EAGAIN;
}
@ -2944,6 +3109,7 @@ je_mallctlbymib(const size_t *mib, size_t miblen, void *oldp, size_t *oldlenp,
check_entry_exit_locking(tsd_tsdn(tsd));
ret = ctl_bymib(tsd, mib, miblen, oldp, oldlenp, newp, newlen);
check_entry_exit_locking(tsd_tsdn(tsd));
LOG("core.mallctlbymib.exit", "result: %d", ret);
return ret;
}
@ -2952,10 +3118,13 @@ je_malloc_stats_print(void (*write_cb)(void *, const char *), void *cbopaque,
const char *opts) {
tsdn_t *tsdn;
LOG("core.malloc_stats_print.entry", "");
tsdn = tsdn_fetch();
check_entry_exit_locking(tsdn);
stats_print(write_cb, cbopaque, opts);
check_entry_exit_locking(tsdn);
LOG("core.malloc_stats_print.exit", "");
}
JEMALLOC_EXPORT size_t JEMALLOC_NOTHROW
@ -2963,6 +3132,8 @@ je_malloc_usable_size(JEMALLOC_USABLE_SIZE_CONST void *ptr) {
size_t ret;
tsdn_t *tsdn;
LOG("core.malloc_usable_size.entry", "ptr: %p", ptr);
assert(malloc_initialized() || IS_INITIALIZER);
tsdn = tsdn_fetch();
@ -2980,6 +3151,7 @@ je_malloc_usable_size(JEMALLOC_USABLE_SIZE_CONST void *ptr) {
}
check_entry_exit_locking(tsdn);
LOG("core.malloc_usable_size.exit", "result: %zu", ret);
return ret;
}

23
src/jemalloc_cpp.cpp
View File

@ -39,12 +39,10 @@ void operator delete(void *ptr, std::size_t size) noexcept;
void operator delete[](void *ptr, std::size_t size) noexcept;
#endif
template <bool IsNoExcept>
void *
newImpl(std::size_t size) noexcept(IsNoExcept) {
void *ptr = je_malloc(size);
if (likely(ptr != nullptr))
return ptr;
JEMALLOC_NOINLINE
static void *
handleOOM(std::size_t size, bool nothrow) {
void *ptr = nullptr;
while (ptr == nullptr) {
std::new_handler handler;
@ -68,11 +66,22 @@ newImpl(std::size_t size) noexcept(IsNoExcept) {
ptr = je_malloc(size);
}
if (ptr == nullptr && !IsNoExcept)
if (ptr == nullptr && !nothrow)
std::__throw_bad_alloc();
return ptr;
}
template <bool IsNoExcept>
JEMALLOC_ALWAYS_INLINE
void *
newImpl(std::size_t size) noexcept(IsNoExcept) {
void *ptr = je_malloc(size);
if (likely(ptr != nullptr))
return ptr;
return handleOOM(size, IsNoExcept);
}
void *
operator new(std::size_t size) {
return newImpl<false>(size);

78
src/log.c Normal file
View File

@ -0,0 +1,78 @@
#include "jemalloc/internal/jemalloc_preamble.h"
#include "jemalloc/internal/jemalloc_internal_includes.h"
#include "jemalloc/internal/log.h"
char log_var_names[JEMALLOC_LOG_VAR_BUFSIZE];
atomic_b_t log_init_done = ATOMIC_INIT(false);
/*
* Returns true if we were able to pick out a segment. Fills in r_segment_end
* with a pointer to the first character after the end of the string.
*/
static const char *
log_var_extract_segment(const char* segment_begin) {
const char *end;
for (end = segment_begin; *end != '\0' && *end != '|'; end++) {
}
return end;
}
static bool
log_var_matches_segment(const char *segment_begin, const char *segment_end,
const char *log_var_begin, const char *log_var_end) {
assert(segment_begin <= segment_end);
assert(log_var_begin < log_var_end);
ptrdiff_t segment_len = segment_end - segment_begin;
ptrdiff_t log_var_len = log_var_end - log_var_begin;
/* The special '.' segment matches everything. */
if (segment_len == 1 && *segment_begin == '.') {
return true;
}
if (segment_len == log_var_len) {
return strncmp(segment_begin, log_var_begin, segment_len) == 0;
} else if (segment_len < log_var_len) {
return strncmp(segment_begin, log_var_begin, segment_len) == 0
&& log_var_begin[segment_len] == '.';
} else {
return false;
}
}
unsigned
log_var_update_state(log_var_t *log_var) {
const char *log_var_begin = log_var->name;
const char *log_var_end = log_var->name + strlen(log_var->name);
/* Pointer to one before the beginning of the current segment. */
const char *segment_begin = log_var_names;
/*
* If log_init done is false, we haven't parsed the malloc conf yet. To
* avoid log-spew, we default to not displaying anything.
*/
if (!atomic_load_b(&log_init_done, ATOMIC_ACQUIRE)) {
return LOG_INITIALIZED_NOT_ENABLED;
}
while (true) {
const char *segment_end = log_var_extract_segment(
segment_begin);
assert(segment_end < log_var_names + JEMALLOC_LOG_VAR_BUFSIZE);
if (log_var_matches_segment(segment_begin, segment_end,
log_var_begin, log_var_end)) {
atomic_store_u(&log_var->state, LOG_ENABLED,
ATOMIC_RELAXED);
return LOG_ENABLED;
}
if (*segment_end == '\0') {
/* Hit the end of the segment string with no match. */
atomic_store_u(&log_var->state,
LOG_INITIALIZED_NOT_ENABLED, ATOMIC_RELAXED);
return LOG_INITIALIZED_NOT_ENABLED;
}
/* Otherwise, skip the delimiter and continue. */
segment_begin = segment_end + 1;
}
}

17
src/malloc_io.c
View File

@ -70,20 +70,7 @@ static char *x2s(uintmax_t x, bool alt_form, bool uppercase, char *s,
/* malloc_message() setup. */
static void
wrtmessage(void *cbopaque, const char *s) {
#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_write)
/*
* Use syscall(2) rather than write(2) when possible in order to avoid
* the possibility of memory allocation within libc. This is necessary
* on FreeBSD; most operating systems do not have this problem though.
*
* syscall() returns long or int, depending on platform, so capture the
* unused result in the widest plausible type to avoid compiler
* warnings.
*/
UNUSED long result = syscall(SYS_write, STDERR_FILENO, s, strlen(s));
#else
UNUSED ssize_t result = write(STDERR_FILENO, s, strlen(s));
#endif
malloc_write_fd(STDERR_FILENO, s, strlen(s));
}
JEMALLOC_EXPORT void (*je_malloc_message)(void *, const char *s);
@ -111,7 +98,7 @@ buferror(int err, char *buf, size_t buflen) {
FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err, 0,
(LPSTR)buf, (DWORD)buflen, NULL);
return 0;
#elif defined(__GLIBC__) && defined(_GNU_SOURCE)
#elif defined(JEMALLOC_STRERROR_R_RETURNS_CHAR_WITH_GNU_SOURCE) && defined(_GNU_SOURCE)
char *b = strerror_r(err, buf, buflen);
if (b != buf) {
strncpy(buf, b, buflen);

5
src/mutex.c
View File

@ -4,6 +4,7 @@
#include "jemalloc/internal/assert.h"
#include "jemalloc/internal/malloc_io.h"
#include "jemalloc/internal/spin.h"
#ifndef _CRT_SPINCOUNT
#define _CRT_SPINCOUNT 4000
@ -53,7 +54,7 @@ malloc_mutex_lock_slow(malloc_mutex_t *mutex) {
int cnt = 0, max_cnt = MALLOC_MUTEX_MAX_SPIN;
do {
CPU_SPINWAIT;
spin_cpu_spinwait();
if (!malloc_mutex_trylock_final(mutex)) {
data->n_spin_acquired++;
return;
@ -173,7 +174,7 @@ malloc_mutex_init(malloc_mutex_t *mutex, const char *name,
mutex->lock_order = lock_order;
if (lock_order == malloc_mutex_address_ordered) {
witness_init(&mutex->witness, name, rank,
mutex_addr_comp, &mutex);
mutex_addr_comp, mutex);
} else {
witness_init(&mutex->witness, name, rank, NULL, NULL);
}

212
src/pages.c
View File

@ -10,6 +10,9 @@
#ifdef JEMALLOC_SYSCTL_VM_OVERCOMMIT
#include <sys/sysctl.h>
#ifdef __FreeBSD__
#include <vm/vm_param.h>
#endif
#endif
/******************************************************************************/
@ -25,6 +28,18 @@ static int mmap_flags;
#endif
static bool os_overcommits;
const char *thp_mode_names[] = {
"default",
"always",
"never",
"not supported"
};
thp_mode_t opt_thp = THP_MODE_DEFAULT;
thp_mode_t init_system_thp_mode;
/* Runtime support for lazy purge. Irrelevant when !pages_can_purge_lazy. */
static bool pages_can_purge_lazy_runtime = true;
/******************************************************************************/
/*
* Function prototypes for static functions that are referenced prior to
@ -252,12 +267,25 @@ pages_purge_lazy(void *addr, size_t size) {
if (!pages_can_purge_lazy) {
return true;
}
if (!pages_can_purge_lazy_runtime) {
/*
* Built with lazy purge enabled, but detected it was not
* supported on the current system.
*/
return true;
}
#ifdef _WIN32
VirtualAlloc(addr, size, MEM_RESET, PAGE_READWRITE);
return false;
#elif defined(JEMALLOC_PURGE_MADVISE_FREE)
return (madvise(addr, size, MADV_FREE) != 0);
return (madvise(addr, size,
# ifdef MADV_FREE
MADV_FREE
# else
JEMALLOC_MADV_FREE
# endif
) != 0);
#elif defined(JEMALLOC_PURGE_MADVISE_DONTNEED) && \
!defined(JEMALLOC_PURGE_MADVISE_DONTNEED_ZEROS)
return (madvise(addr, size, MADV_DONTNEED) != 0);
@ -286,12 +314,13 @@ pages_purge_forced(void *addr, size_t size) {
#endif
}
bool
pages_huge(void *addr, size_t size) {
static bool
pages_huge_impl(void *addr, size_t size, bool aligned) {
if (aligned) {
assert(HUGEPAGE_ADDR2BASE(addr) == addr);
assert(HUGEPAGE_CEILING(size) == size);
#ifdef JEMALLOC_THP
}
#ifdef JEMALLOC_HAVE_MADVISE_HUGE
return (madvise(addr, size, MADV_HUGEPAGE) != 0);
#else
return true;
@ -299,23 +328,70 @@ pages_huge(void *addr, size_t size) {
}
bool
pages_nohuge(void *addr, size_t size) {
pages_huge(void *addr, size_t size) {
return pages_huge_impl(addr, size, true);
}
static bool
pages_huge_unaligned(void *addr, size_t size) {
return pages_huge_impl(addr, size, false);
}
static bool
pages_nohuge_impl(void *addr, size_t size, bool aligned) {
if (aligned) {
assert(HUGEPAGE_ADDR2BASE(addr) == addr);
assert(HUGEPAGE_CEILING(size) == size);
}
#ifdef JEMALLOC_THP
#ifdef JEMALLOC_HAVE_MADVISE_HUGE
return (madvise(addr, size, MADV_NOHUGEPAGE) != 0);
#else
return false;
#endif
}
bool
pages_nohuge(void *addr, size_t size) {
return pages_nohuge_impl(addr, size, true);
}
static bool
pages_nohuge_unaligned(void *addr, size_t size) {
return pages_nohuge_impl(addr, size, false);
}
bool
pages_dontdump(void *addr, size_t size) {
assert(PAGE_ADDR2BASE(addr) == addr);
assert(PAGE_CEILING(size) == size);
#ifdef JEMALLOC_MADVISE_DONTDUMP
return madvise(addr, size, MADV_DONTDUMP) != 0;
#else
return false;
#endif
}
bool
pages_dodump(void *addr, size_t size) {
assert(PAGE_ADDR2BASE(addr) == addr);
assert(PAGE_CEILING(size) == size);
#ifdef JEMALLOC_MADVISE_DONTDUMP
return madvise(addr, size, MADV_DODUMP) != 0;
#else
return false;
#endif
}
static size_t
os_page_detect(void) {
#ifdef _WIN32
SYSTEM_INFO si;
GetSystemInfo(&si);
return si.dwPageSize;
#elif defined(__FreeBSD__)
return getpagesize();
#else
long result = sysconf(_SC_PAGESIZE);
if (result == -1) {
@ -332,9 +408,19 @@ os_overcommits_sysctl(void) {
size_t sz;
sz = sizeof(vm_overcommit);
#if defined(__FreeBSD__) && defined(VM_OVERCOMMIT)
int mib[2];
mib[0] = CTL_VM;
mib[1] = VM_OVERCOMMIT;
if (sysctl(mib, 2, &vm_overcommit, &sz, NULL, 0) != 0) {
return false; /* Error. */
}
#else
if (sysctlbyname("vm.overcommit", &vm_overcommit, &sz, NULL, 0) != 0) {
return false; /* Error. */
}
#endif
return ((vm_overcommit & 0x3) == 0);
}
@ -350,27 +436,44 @@ static bool
os_overcommits_proc(void) {
int fd;
char buf[1];
ssize_t nread;
#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_open)
#if defined(O_CLOEXEC)
fd = (int)syscall(SYS_open, "/proc/sys/vm/overcommit_memory", O_RDONLY |
O_CLOEXEC);
#else
fd = (int)syscall(SYS_open, "/proc/sys/vm/overcommit_memory", O_RDONLY);
if (fd != -1) {
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
}
#endif
#elif defined(JEMALLOC_USE_SYSCALL) && defined(SYS_openat)
#if defined(O_CLOEXEC)
fd = (int)syscall(SYS_openat,
AT_FDCWD, "/proc/sys/vm/overcommit_memory", O_RDONLY | O_CLOEXEC);
#else
fd = (int)syscall(SYS_openat,
AT_FDCWD, "/proc/sys/vm/overcommit_memory", O_RDONLY);
if (fd != -1) {
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
}
#endif
#else
#if defined(O_CLOEXEC)
fd = open("/proc/sys/vm/overcommit_memory", O_RDONLY | O_CLOEXEC);
#else
fd = open("/proc/sys/vm/overcommit_memory", O_RDONLY);
if (fd != -1) {
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
}
#endif
#endif
if (fd == -1) {
return false; /* Error. */
}
#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_read)
nread = (ssize_t)syscall(SYS_read, fd, &buf, sizeof(buf));
#else
nread = read(fd, &buf, sizeof(buf));
#endif
ssize_t nread = malloc_read_fd(fd, &buf, sizeof(buf));
#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_close)
syscall(SYS_close, fd);
#else
@ -390,6 +493,71 @@ os_overcommits_proc(void) {
}
#endif
void
pages_set_thp_state (void *ptr, size_t size) {
if (opt_thp == thp_mode_default || opt_thp == init_system_thp_mode) {
return;
}
assert(opt_thp != thp_mode_not_supported &&
init_system_thp_mode != thp_mode_not_supported);
if (opt_thp == thp_mode_always
&& init_system_thp_mode != thp_mode_never) {
assert(init_system_thp_mode == thp_mode_default);
pages_huge_unaligned(ptr, size);
} else if (opt_thp == thp_mode_never) {
assert(init_system_thp_mode == thp_mode_default ||
init_system_thp_mode == thp_mode_always);
pages_nohuge_unaligned(ptr, size);
}
}
static void
init_thp_state(void) {
if (!have_madvise_huge) {
if (metadata_thp_enabled() && opt_abort) {
malloc_write("<jemalloc>: no MADV_HUGEPAGE support\n");
abort();
}
goto label_error;
}
static const char sys_state_madvise[] = "always [madvise] never\n";
static const char sys_state_always[] = "[always] madvise never\n";
static const char sys_state_never[] = "always madvise [never]\n";
char buf[sizeof(sys_state_madvise)];
#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_open)
int fd = (int)syscall(SYS_open,
"/sys/kernel/mm/transparent_hugepage/enabled", O_RDONLY);
#else
int fd = open("/sys/kernel/mm/transparent_hugepage/enabled", O_RDONLY);
#endif
if (fd == -1) {
goto label_error;
}
ssize_t nread = malloc_read_fd(fd, &buf, sizeof(buf));
#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_close)
syscall(SYS_close, fd);
#else
close(fd);
#endif
if (strncmp(buf, sys_state_madvise, (size_t)nread) == 0) {
init_system_thp_mode = thp_mode_default;
} else if (strncmp(buf, sys_state_always, (size_t)nread) == 0) {
init_system_thp_mode = thp_mode_always;
} else if (strncmp(buf, sys_state_never, (size_t)nread) == 0) {
init_system_thp_mode = thp_mode_never;
} else {
goto label_error;
}
return;
label_error:
opt_thp = init_system_thp_mode = thp_mode_not_supported;
}
bool
pages_boot(void) {
os_page = os_page_detect();
@ -418,5 +586,21 @@ pages_boot(void) {
os_overcommits = false;
#endif
init_thp_state();
/* Detect lazy purge runtime support. */
if (pages_can_purge_lazy) {
bool committed = false;
void *madv_free_page = os_pages_map(NULL, PAGE, PAGE, &committed);
if (madv_free_page == NULL) {
return true;
}
assert(pages_can_purge_lazy_runtime);
if (pages_purge_lazy(madv_free_page, PAGE)) {
pages_can_purge_lazy_runtime = false;
}
os_pages_unmap(madv_free_page, PAGE);
}
return false;
}

19
src/prof.c
View File

@ -978,7 +978,7 @@ prof_dump_flush(bool propagate_err) {
cassert(config_prof);
err = write(prof_dump_fd, prof_dump_buf, prof_dump_buf_end);
err = malloc_write_fd(prof_dump_fd, prof_dump_buf, prof_dump_buf_end);
if (err == -1) {
if (!propagate_err) {
malloc_write("<jemalloc>: write() failed during heap "
@ -1409,7 +1409,15 @@ prof_open_maps(const char *format, ...) {
va_start(ap, format);
malloc_vsnprintf(filename, sizeof(filename), format, ap);
va_end(ap);
#if defined(O_CLOEXEC)
mfd = open(filename, O_RDONLY | O_CLOEXEC);
#else
mfd = open(filename, O_RDONLY);
if (mfd != -1) {
fcntl(mfd, F_SETFD, fcntl(mfd, F_GETFD) | FD_CLOEXEC);
}
#endif
return mfd;
}
@ -1463,8 +1471,9 @@ prof_dump_maps(bool propagate_err) {
goto label_return;
}
}
nread = read(mfd, &prof_dump_buf[prof_dump_buf_end],
PROF_DUMP_BUFSIZE - prof_dump_buf_end);
nread = malloc_read_fd(mfd,
&prof_dump_buf[prof_dump_buf_end], PROF_DUMP_BUFSIZE
- prof_dump_buf_end);
} while (nread > 0);
} else {
ret = true;
@ -1772,7 +1781,7 @@ prof_idump(tsdn_t *tsdn) {
cassert(config_prof);
if (!prof_booted || tsdn_null(tsdn)) {
if (!prof_booted || tsdn_null(tsdn) || !prof_active_get_unlocked()) {
return;
}
tsd = tsdn_tsd(tsdn);
@ -1829,7 +1838,7 @@ prof_gdump(tsdn_t *tsdn) {
cassert(config_prof);
if (!prof_booted || tsdn_null(tsdn)) {
if (!prof_booted || tsdn_null(tsdn) || !prof_active_get_unlocked()) {
return;
}
tsd = tsdn_tsd(tsdn);

4
src/spin.c
View File

@ -1,4 +0,0 @@
#define JEMALLOC_SPIN_C_
#include "jemalloc/internal/jemalloc_preamble.h"
#include "jemalloc/internal/spin.h"

1707
src/stats.c
View File

File diff suppressed because it is too large Load Diff

3
src/sz.c
View File

@ -26,7 +26,8 @@ const size_t sz_index2size_tab[NSIZES] = {
JEMALLOC_ALIGNED(CACHELINE)
const uint8_t sz_size2index_tab[] = {
#if LG_TINY_MIN == 0
#warning "Dangerous LG_TINY_MIN"
/* The div module doesn't support division by 1. */
#error "Unsupported LG_TINY_MIN"
#define S2B_0(i) i,
#elif LG_TINY_MIN == 1
#warning "Dangerous LG_TINY_MIN"

59
src/tcache.c
View File

@ -12,7 +12,7 @@
bool opt_tcache = true;
ssize_t opt_lg_tcache_max = LG_TCACHE_MAXCLASS_DEFAULT;
tcache_bin_info_t *tcache_bin_info;
cache_bin_info_t *tcache_bin_info;
static unsigned stack_nelms; /* Total stack elms per tcache. */
unsigned nhbins;
@ -40,7 +40,7 @@ void
tcache_event_hard(tsd_t *tsd, tcache_t *tcache) {
szind_t binind = tcache->next_gc_bin;
tcache_bin_t *tbin;
cache_bin_t *tbin;
if (binind < NBINS) {
tbin = tcache_small_bin_get(tcache, binind);
} else {
@ -58,7 +58,7 @@ tcache_event_hard(tsd_t *tsd, tcache_t *tcache) {
* Reduce fill count by 2X. Limit lg_fill_div such that
* the fill count is always at least 1.
*/
tcache_bin_info_t *tbin_info = &tcache_bin_info[binind];
cache_bin_info_t *tbin_info = &tcache_bin_info[binind];
if ((tbin_info->ncached_max >>
(tcache->lg_fill_div[binind] + 1)) >= 1) {
tcache->lg_fill_div[binind]++;
@ -86,7 +86,7 @@ tcache_event_hard(tsd_t *tsd, tcache_t *tcache) {
void *
tcache_alloc_small_hard(tsdn_t *tsdn, arena_t *arena, tcache_t *tcache,
tcache_bin_t *tbin, szind_t binind, bool *tcache_success) {
cache_bin_t *tbin, szind_t binind, bool *tcache_success) {
void *ret;
assert(tcache->arena != NULL);
@ -95,18 +95,18 @@ tcache_alloc_small_hard(tsdn_t *tsdn, arena_t *arena, tcache_t *tcache,
if (config_prof) {
tcache->prof_accumbytes = 0;
}
ret = tcache_alloc_easy(tbin, tcache_success);
ret = cache_bin_alloc_easy(tbin, tcache_success);
return ret;
}
void
tcache_bin_flush_small(tsd_t *tsd, tcache_t *tcache, tcache_bin_t *tbin,
tcache_bin_flush_small(tsd_t *tsd, tcache_t *tcache, cache_bin_t *tbin,
szind_t binind, unsigned rem) {
bool merged_stats = false;
assert(binind < NBINS);
assert(rem <= tbin->ncached);
assert((cache_bin_sz_t)rem <= tbin->ncached);
arena_t *arena = tcache->arena;
assert(arena != NULL);
@ -121,7 +121,7 @@ tcache_bin_flush_small(tsd_t *tsd, tcache_t *tcache, tcache_bin_t *tbin,
/* Lock the arena bin associated with the first object. */
extent_t *extent = item_extent[0];
arena_t *bin_arena = extent_arena_get(extent);
arena_bin_t *bin = &bin_arena->bins[binind];
bin_t *bin = &bin_arena->bins[binind];
if (config_prof && bin_arena == arena) {
if (arena_prof_accum(tsd_tsdn(tsd), arena,
@ -169,7 +169,7 @@ tcache_bin_flush_small(tsd_t *tsd, tcache_t *tcache, tcache_bin_t *tbin,
* The flush loop didn't happen to flush to this thread's
* arena, so the stats didn't get merged. Manually do so now.
*/
arena_bin_t *bin = &arena->bins[binind];
bin_t *bin = &arena->bins[binind];
malloc_mutex_lock(tsd_tsdn(tsd), &bin->lock);
bin->stats.nflushes++;
bin->stats.nrequests += tbin->tstats.nrequests;
@ -180,18 +180,18 @@ tcache_bin_flush_small(tsd_t *tsd, tcache_t *tcache, tcache_bin_t *tbin,
memmove(tbin->avail - rem, tbin->avail - tbin->ncached, rem *
sizeof(void *));
tbin->ncached = rem;
if ((low_water_t)tbin->ncached < tbin->low_water) {
if (tbin->ncached < tbin->low_water) {
tbin->low_water = tbin->ncached;
}
}
void
tcache_bin_flush_large(tsd_t *tsd, tcache_bin_t *tbin, szind_t binind,
tcache_bin_flush_large(tsd_t *tsd, cache_bin_t *tbin, szind_t binind,
unsigned rem, tcache_t *tcache) {
bool merged_stats = false;
assert(binind < nhbins);
assert(rem <= tbin->ncached);
assert((cache_bin_sz_t)rem <= tbin->ncached);
arena_t *arena = tcache->arena;
assert(arena != NULL);
@ -278,7 +278,7 @@ tcache_bin_flush_large(tsd_t *tsd, tcache_bin_t *tbin, szind_t binind,
memmove(tbin->avail - rem, tbin->avail - tbin->ncached, rem *
sizeof(void *));
tbin->ncached = rem;
if ((low_water_t)tbin->ncached < tbin->low_water) {
if (tbin->ncached < tbin->low_water) {
tbin->low_water = tbin->ncached;
}
}
@ -291,8 +291,15 @@ tcache_arena_associate(tsdn_t *tsdn, tcache_t *tcache, arena_t *arena) {
if (config_stats) {
/* Link into list of extant tcaches. */
malloc_mutex_lock(tsdn, &arena->tcache_ql_mtx);
ql_elm_new(tcache, link);
ql_tail_insert(&arena->tcache_ql, tcache, link);
cache_bin_array_descriptor_init(
&tcache->cache_bin_array_descriptor, tcache->bins_small,
tcache->bins_large);
ql_tail_insert(&arena->cache_bin_array_descriptor_ql,
&tcache->cache_bin_array_descriptor, link);
malloc_mutex_unlock(tsdn, &arena->tcache_ql_mtx);
}
}
@ -316,6 +323,8 @@ tcache_arena_dissociate(tsdn_t *tsdn, tcache_t *tcache) {
assert(in_ql);
}
ql_remove(&arena->tcache_ql, tcache, link);
ql_remove(&arena->cache_bin_array_descriptor_ql,
&tcache->cache_bin_array_descriptor, link);
tcache_stats_merge(tsdn, tcache, arena);
malloc_mutex_unlock(tsdn, &arena->tcache_ql_mtx);
}
@ -354,8 +363,8 @@ tcache_init(tsd_t *tsd, tcache_t *tcache, void *avail_stack) {
size_t stack_offset = 0;
assert((TCACHE_NSLOTS_SMALL_MAX & 1U) == 0);
memset(tcache->tbins_small, 0, sizeof(tcache_bin_t) * NBINS);
memset(tcache->tbins_large, 0, sizeof(tcache_bin_t) * (nhbins - NBINS));
memset(tcache->bins_small, 0, sizeof(cache_bin_t) * NBINS);
memset(tcache->bins_large, 0, sizeof(cache_bin_t) * (nhbins - NBINS));
unsigned i = 0;
for (; i < NBINS; i++) {
tcache->lg_fill_div[i] = 1;
@ -450,7 +459,7 @@ tcache_flush_cache(tsd_t *tsd, tcache_t *tcache) {
assert(tcache->arena != NULL);
for (unsigned i = 0; i < NBINS; i++) {
tcache_bin_t *tbin = tcache_small_bin_get(tcache, i);
cache_bin_t *tbin = tcache_small_bin_get(tcache, i);
tcache_bin_flush_small(tsd, tcache, tbin, i, 0);
if (config_stats) {
@ -458,7 +467,7 @@ tcache_flush_cache(tsd_t *tsd, tcache_t *tcache) {
}
}
for (unsigned i = NBINS; i < nhbins; i++) {
tcache_bin_t *tbin = tcache_large_bin_get(tcache, i);
cache_bin_t *tbin = tcache_large_bin_get(tcache, i);
tcache_bin_flush_large(tsd, tbin, i, 0, tcache);
if (config_stats) {
@ -524,8 +533,8 @@ tcache_stats_merge(tsdn_t *tsdn, tcache_t *tcache, arena_t *arena) {
/* Merge and reset tcache stats. */
for (i = 0; i < NBINS; i++) {
arena_bin_t *bin = &arena->bins[i];
tcache_bin_t *tbin = tcache_small_bin_get(tcache, i);
bin_t *bin = &arena->bins[i];
cache_bin_t *tbin = tcache_small_bin_get(tcache, i);
malloc_mutex_lock(tsdn, &bin->lock);
bin->stats.nrequests += tbin->tstats.nrequests;
malloc_mutex_unlock(tsdn, &bin->lock);
@ -533,7 +542,7 @@ tcache_stats_merge(tsdn_t *tsdn, tcache_t *tcache, arena_t *arena) {
}
for (; i < nhbins; i++) {
tcache_bin_t *tbin = tcache_large_bin_get(tcache, i);
cache_bin_t *tbin = tcache_large_bin_get(tcache, i);
arena_stats_large_nrequests_add(tsdn, &arena->stats, i,
tbin->tstats.nrequests);
tbin->tstats.nrequests = 0;
@ -657,21 +666,21 @@ tcache_boot(tsdn_t *tsdn) {
nhbins = sz_size2index(tcache_maxclass) + 1;
/* Initialize tcache_bin_info. */
tcache_bin_info = (tcache_bin_info_t *)base_alloc(tsdn, b0get(), nhbins
* sizeof(tcache_bin_info_t), CACHELINE);
tcache_bin_info = (cache_bin_info_t *)base_alloc(tsdn, b0get(), nhbins
* sizeof(cache_bin_info_t), CACHELINE);
if (tcache_bin_info == NULL) {
return true;
}
stack_nelms = 0;
unsigned i;
for (i = 0; i < NBINS; i++) {
if ((arena_bin_info[i].nregs << 1) <= TCACHE_NSLOTS_SMALL_MIN) {
if ((bin_infos[i].nregs << 1) <= TCACHE_NSLOTS_SMALL_MIN) {
tcache_bin_info[i].ncached_max =
TCACHE_NSLOTS_SMALL_MIN;
} else if ((arena_bin_info[i].nregs << 1) <=
} else if ((bin_infos[i].nregs << 1) <=
TCACHE_NSLOTS_SMALL_MAX) {
tcache_bin_info[i].ncached_max =
(arena_bin_info[i].nregs << 1);
(bin_infos[i].nregs << 1);
} else {
tcache_bin_info[i].ncached_max =
TCACHE_NSLOTS_SMALL_MAX;

10
src/tsd.c
View File

@ -71,6 +71,16 @@ tsd_data_init(tsd_t *tsd) {
*/
rtree_ctx_data_init(tsd_rtree_ctxp_get_unsafe(tsd));
/*
* A nondeterministic seed based on the address of tsd reduces
* the likelihood of lockstep non-uniform cache index
* utilization among identical concurrent processes, but at the
* cost of test repeatability. For debug builds, instead use a
* deterministic seed.
*/
*tsd_offset_statep_get(tsd) = config_debug ? 0 :
(uint64_t)(uintptr_t)tsd;
return tsd_tcache_enabled_data_init(tsd);
}

28
src/zone.c
View File

@ -89,6 +89,7 @@ JEMALLOC_ATTR(weak_import);
static malloc_zone_t *default_zone, *purgeable_zone;
static malloc_zone_t jemalloc_zone;
static struct malloc_introspection_t jemalloc_zone_introspect;
static pid_t zone_force_lock_pid = -1;
/******************************************************************************/
/* Function prototypes for non-inline static functions. */
@ -270,6 +271,12 @@ zone_log(malloc_zone_t *zone, void *address) {
static void
zone_force_lock(malloc_zone_t *zone) {
if (isthreaded) {
/*
* See the note in zone_force_unlock, below, to see why we need
* this.
*/
assert(zone_force_lock_pid == -1);
zone_force_lock_pid = getpid();
jemalloc_prefork();
}
}
@ -277,15 +284,26 @@ zone_force_lock(malloc_zone_t *zone) {
static void
zone_force_unlock(malloc_zone_t *zone) {
/*
* Call jemalloc_postfork_child() rather than
* jemalloc_postfork_parent(), because this function is executed by both
* parent and child. The parent can tolerate having state
* reinitialized, but the child cannot unlock mutexes that were locked
* by the parent.
* zone_force_lock and zone_force_unlock are the entry points to the
* forking machinery on OS X. The tricky thing is, the child is not
* allowed to unlock mutexes locked in the parent, even if owned by the
* forking thread (and the mutex type we use in OS X will fail an assert
* if we try). In the child, we can get away with reinitializing all
* the mutexes, which has the effect of unlocking them. In the parent,
* doing this would mean we wouldn't wake any waiters blocked on the
* mutexes we unlock. So, we record the pid of the current thread in
* zone_force_lock, and use that to detect if we're in the parent or
* child here, to decide which unlock logic we need.
*/
if (isthreaded) {
assert(zone_force_lock_pid != -1);
if (getpid() == zone_force_lock_pid) {
jemalloc_postfork_parent();
} else {
jemalloc_postfork_child();
}
zone_force_lock_pid = -1;
}
}
static void

2
test/include/test/extent_hooks.h
View File

@ -266,6 +266,8 @@ extent_merge_hook(extent_hooks_t *extent_hooks, void *addr_a, size_t size_a,
"extent_hooks should be same as pointer used to set hooks");
assert_ptr_eq(extent_hooks->merge, extent_merge_hook,
"Wrong hook function");
assert_ptr_eq((void *)((uintptr_t)addr_a + size_a), addr_b,
"Extents not mergeable");
called_merge = true;
if (!try_merge) {
return true;

59
test/integration/extent.c
View File

@ -98,7 +98,45 @@ test_extent_body(unsigned arena_ind) {
dallocx(p, flags);
}
TEST_BEGIN(test_extent_manual_hook) {
static void
test_manual_hook_auto_arena(void) {
unsigned narenas;
size_t old_size, new_size, sz;
size_t hooks_mib[3];
size_t hooks_miblen;
extent_hooks_t *new_hooks, *old_hooks;
extent_hooks_prep();
sz = sizeof(unsigned);
/* Get number of auto arenas. */
assert_d_eq(mallctl("opt.narenas", (void *)&narenas, &sz, NULL, 0),
0, "Unexpected mallctl() failure");
if (narenas == 1) {
return;
}
/* Install custom extent hooks on arena 1 (might not be initialized). */
hooks_miblen = sizeof(hooks_mib)/sizeof(size_t);
assert_d_eq(mallctlnametomib("arena.0.extent_hooks", hooks_mib,
&hooks_miblen), 0, "Unexpected mallctlnametomib() failure");
hooks_mib[1] = 1;
old_size = sizeof(extent_hooks_t *);
new_hooks = &hooks;
new_size = sizeof(extent_hooks_t *);
assert_d_eq(mallctlbymib(hooks_mib, hooks_miblen, (void *)&old_hooks,
&old_size, (void *)&new_hooks, new_size), 0,
"Unexpected extent_hooks error");
static bool auto_arena_created = false;
if (old_hooks != &hooks) {
assert_b_eq(auto_arena_created, false,
"Expected auto arena 1 created only once.");
auto_arena_created = true;
}
}
static void
test_manual_hook_body(void) {
unsigned arena_ind;
size_t old_size, new_size, sz;
size_t hooks_mib[3];
@ -139,8 +177,9 @@ TEST_BEGIN(test_extent_manual_hook) {
assert_ptr_ne(old_hooks->merge, extent_merge_hook,
"Unexpected extent_hooks error");
test_skip_if(check_background_thread_enabled());
if (!check_background_thread_enabled()) {
test_extent_body(arena_ind);
}
/* Restore extent hooks. */
assert_d_eq(mallctlbymib(hooks_mib, hooks_miblen, NULL, NULL,
@ -165,6 +204,22 @@ TEST_BEGIN(test_extent_manual_hook) {
assert_ptr_eq(old_hooks->merge, default_hooks->merge,
"Unexpected extent_hooks error");
}
TEST_BEGIN(test_extent_manual_hook) {
test_manual_hook_auto_arena();
test_manual_hook_body();
/* Test failure paths. */
try_split = false;
test_manual_hook_body();
try_merge = false;
test_manual_hook_body();
try_purge_lazy = false;
try_purge_forced = false;
test_manual_hook_body();
try_split = try_merge = try_purge_lazy = try_purge_forced = true;
}
TEST_END
TEST_BEGIN(test_extent_auto_hook) {

10
test/integration/mallocx.c
View File

@ -151,9 +151,17 @@ TEST_BEGIN(test_basic) {
TEST_END
TEST_BEGIN(test_alignment_and_size) {
const char *percpu_arena;
size_t sz = sizeof(percpu_arena);
if(mallctl("opt.percpu_arena", (void *)&percpu_arena, &sz, NULL, 0) ||
strcmp(percpu_arena, "disabled") != 0) {
test_skip("test_alignment_and_size skipped: "
"not working with percpu arena.");
};
#define MAXALIGN (((size_t)1) << 23)
#define NITER 4
size_t nsz, rsz, sz, alignment, total;
size_t nsz, rsz, alignment, total;
unsigned i;
void *ps[NITER];

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