Commit Graph

793 Commits

Author SHA1 Message Date
David Goldblatt
21f7c13d0b Add the div module, which allows fast division by dynamic values. 2017-12-21 14:25:43 -08:00
David T. Goldblatt
7f1b02e3fa Split up and standardize naming of stats code.
The arena-associated stats are now all prefixed with arena_stats_, and live in
their own file.  Likewise, malloc_bin_stats_t -> bin_stats_t, also in its own
file.
2017-12-18 16:29:10 -08:00
David T. Goldblatt
901d94a2b0 Rename cache_alloc_easy to cache_bin_alloc_easy.
This lives in the cache_bin module; just a typo.
2017-12-18 16:29:10 -08:00
David T. Goldblatt
8aafa270fd Move bin stats code from arena to bin module. 2017-12-18 16:29:10 -08:00
David T. Goldblatt
48bb4a056b Move bin forking code from arena to bin module. 2017-12-18 16:29:10 -08:00
David T. Goldblatt
a8dd8876fb Move bin initialization from arena module to bin module. 2017-12-18 16:29:10 -08:00
David T. Goldblatt
4bf4a1c4ea Pull out arena_bin_info_t and arena_bin_t into their own file.
In the process, kill arena_bin_index, which is unused.  To follow are several
diffs continuing this separation.
2017-12-18 16:29:10 -08:00
Qi Wang
740bdd68b1 Over purge by 1 extent always.
When purging, large allocations are usually the ones that cross the npages_limit
threshold, simply because they are "large".  This means we often leave the large
extent around for a while, which has the downsides of: 1) high RSS and 2) more
chance of them getting fragmented.  Given that they are not likely to be reused
very soon (LRU), let's over purge by 1 extent (which is often large and not
reused frequently).
2017-12-18 12:57:07 -08:00
Ed Schouten
749caf14ae Also use __riscv to detect builds for RISC-V CPUs.
According to the RISC-V toolchain conventions, __riscv__ is the old
spelling of this definition. __riscv should be used going forward.

https://github.com/riscv/riscv-toolchain-conventions#cc-preprocessor-definitions
2017-12-09 10:10:42 -08:00
Qi Wang
eb1b08daae Fix an extent coalesce bug.
When coalescing, we should take both extents off the LRU list; otherwise decay
can grab the existing outer extent through extents_evict.
2017-11-16 15:32:02 -08:00
Qi Wang
fac706836f Add opt.lg_extent_max_active_fit
When allocating from dirty extents (which we always prefer if available), large
active extents can get split even if the new allocation is much smaller, in
which case the introduced fragmentation causes high long term damage.  This new
option controls the threshold to reuse and split an existing active extent.  We
avoid using a large extent for much smaller sizes, in order to reduce
fragmentation.  In some workload, adding the threshold improves virtual memory
usage by >10x.
2017-11-16 15:32:02 -08:00
Dave Watson
d6feed6e66 Use tsd offset_state instead of atomic
While working on #852, I noticed the prng state is atomic.  This is the only
atomic use of prng in all of jemalloc.  Instead, use a threadlocal prng
state if possible to avoid unnecessary cache line contention.
2017-11-14 08:58:18 -08:00
Qi Wang
cb3b72b975 Fix base allocator THP auto mode locking and stats.
Added proper synchronization for switching to using THP in auto mode.  Also
fixed stats for number of THPs used.
2017-11-09 16:14:12 -08:00
Qi Wang
b5d071c266 Fix unbounded increase in stash_decayed.
Added an upper bound on how many pages we can decay during the current run.
Without this, decay could have unbounded increase in stashed, since other
threads could add new pages into the extents.
2017-11-08 16:33:30 -08:00
Qi Wang
e422fa8e7e Add arena.i.retain_grow_limit
This option controls the max size when grow_retained.  This is useful when we
have customized extent hooks reserving physical memory (e.g. 1G huge pages).
Without this feature, the default increasing sequence could result in fragmented
and wasted physical memory.
2017-11-03 13:53:33 -07:00
Qi Wang
58eba024c0 metadata_thp: auto mode adjustment for a0.
We observed that arena 0 can have much more metadata allocated comparing to
other arenas.  Tune the auto mode to only switch to huge page on the 5th block
(instead of 3 previously) for a0.
2017-11-01 13:52:06 -07:00
David Goldblatt
d14bbf8d81 Add a "dumpable" bit to the extent state.
Currently, this is unused (i.e. all extents are always marked dumpable).  In the
future, we'll begin using this functionality.
2017-10-16 15:35:49 -07:00
David Goldblatt
bbaa72422b Add pages_dontdump and pages_dodump.
This will, eventually, enable us to avoid dumping eden regions.
2017-10-16 15:35:49 -07:00
David Goldblatt
ccd09050aa Add configure-time detection for madvise(..., MADV_DO[NT]DUMP) 2017-10-16 15:35:49 -07:00
Qi Wang
31ab38be5f Define MADV_FREE on our own when needed.
On x86 Linux, we define our own MADV_FREE if madvise(2) is available, but no
MADV_FREE is detected.  This allows the feature to be built in and enabled with
runtime detection.
2017-10-11 15:49:22 -07:00
David Goldblatt
1245faae90 Power: disable the CPU_SPINWAIT macro.
Quoting from https://github.com/jemalloc/jemalloc/issues/761 :

[...] reading the Power ISA documentation[1], the assembly in [the CPU_SPINWAIT
macro] isn't correct anyway (as @marxin points out): the setting of the
program-priority register is "sticky", and we never undo the lowering.

We could do something similar, but given that we don't have testing here in the
first place, I'm inclined to simply not try. I'll put something up reverting the
problematic commit tomorrow.

[1] Book II, chapter 3 of the 2.07B or 3.0B ISA documents.
2017-10-04 18:37:23 -07:00
Dave Watson
7c6c99b829 Use ph instead of rb tree for extents_avail_
There does not seem to be any overlap between usage of
extent_avail and extent_heap, so we can use the same hook.

The only remaining usage of rb trees is in the profiling code,
which has some 'interesting' iteration constraints.

Fixes #888
2017-10-04 12:23:03 -07:00
David Goldblatt
8a7ee3014c Logging: capitalize log macro.
Dodge a name-conflict with the math.h logarithm function. D'oh.
2017-10-02 20:44:43 -07:00
David Goldblatt
7a8bc7172b ARM: Don't extend bit LG_VADDR to compute high address bits.
In userspace ARM on Linux, zero-ing the high bits is the correct way to do this.
This doesn't fix the fact that we currently set LG_VADDR to 48 on ARM, when in
fact larger virtual address sizes are coming soon.  We'll cross that bridge when
we come to it.
2017-10-02 14:54:46 -07:00
Qi Wang
3959a9fe19 Avoid left shift by negative values.
Fix warnings on -Wshift-negative-value.
2017-09-25 15:38:58 -07:00
Qi Wang
56f0e57844 Add "falls through" comment explicitly.
Fix warnings by -Wimplicit-fallthrough.
2017-09-25 15:38:58 -07:00
Qi Wang
d60f3bac12 Add missing field in initializer for rtree cache.
Fix a warning by -Wmissing-field-initializers.
2017-09-21 12:18:10 -07:00
Qi Wang
a315688be0 Relax constraints on reentrancy for extent hooks.
If we guarantee no malloc activity in extent hooks, it's possible to make
customized hooks working on arena 0.  Remove the non-a0 assertion to enable such
use cases.
2017-08-31 11:03:34 -07:00
Qi Wang
e55c3ca267 Add stats for metadata_thp.
Report number of THPs used in arena and aggregated stats.
2017-08-30 16:47:32 -07:00
Qi Wang
47b20bb654 Change opt.metadata_thp to [disabled,auto,always].
To avoid the high RSS caused by THP + low usage arena (i.e. THP becomes a
significant percentage), added a new "auto" option which will only start 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.
2017-08-30 16:47:32 -07:00
David Goldblatt
ea91dfa58e Document the ialloc function abbreviations.
In the jemalloc_internal_inlines files, we have a lot of somewhat terse function
names.  This commit adds some documentation to aid in translation.
2017-08-16 17:48:44 -07:00
David Goldblatt
9c0549007d Make arena stats collection go through cache bins.
This eliminates the need for the arena stats code to "know" about tcaches; all
that it needs is a cache_bin_array_descriptor_t to tell it where to find
cache_bins whose stats it should aggregate.
2017-08-16 17:48:44 -07:00
David Goldblatt
f3170baa30 Pull out caching for a bin into its own file.
This is the first step towards breaking up the tcache and arena (since they
interact primarily at the bin level).  It should also make a future arena
caching implementation more straightforward.
2017-08-16 17:48:44 -07:00
Faidon Liambotis
82d1a3fb31 Add support for m68k, nios2, SH3 architectures
Add minimum alignment for three more architectures, as requested by
Debian users or porters (see Debian bugs #807554, #816236, #863424).
2017-08-11 16:35:44 -07:00
Qi Wang
3ec279ba1c Fix test/unit/pages.
As part of the metadata_thp support, We now have a separate swtich
(JEMALLOC_HAVE_MADVISE_HUGE) for MADV_HUGEPAGE availability.  Use that instead
of JEMALLOC_THP (which doesn't guard pages_huge anymore) in tests.
2017-08-11 15:57:12 -07:00
Qi Wang
8fdd9a5797 Implement opt.metadata_thp
This option enables transparent huge page for base allocators (require
MADV_HUGEPAGE support).
2017-08-11 14:51:20 -07:00
Ryan Libby
048c6679cd Remove external linkage for spin_adaptive
The external linkage for spin_adaptive was not used, and the inline
declaration of spin_adaptive that was used caused a probem on FreeBSD
where CPU_SPINWAIT is implemented as a call to a static procedure for
x86 architectures.
2017-08-08 10:30:21 -07:00
David Goldblatt
e6aeceb606 Logging: log using the log var names directly.
Currently we have to log by writing something like:

  static log_var_t log_a_b_c = LOG_VAR_INIT("a.b.c");
  log (log_a_b_c, "msg");

This is sort of annoying.  Let's just write:

  log("a.b.c", "msg");
2017-07-24 14:55:54 -07:00
David Goldblatt
a9f7732d45 Logging: allow logging with empty varargs.
Currently, the log macro requires at least one argument after the format string,
because of the way the preprocessor handles varargs macros.  We can hide some of
that irritation by pushing the extra arguments into a varargs function.
2017-07-22 09:38:19 -07:00
David T. Goldblatt
e215a7bc18 Add entry and exit logging to all core functions.
I.e. mallloc, free, the allocx API, the posix extensions.
2017-07-20 17:58:37 -07:00
David T. Goldblatt
9761b449c8 Add a logging facility.
This sets up a hierarchical logging facility, so that we can add logging
statements liberally, and turn them on in a fine-grained manner.
2017-07-20 17:58:37 -07:00
Qi Wang
cb032781bd Add extent_grow_mtx in pre_ / post_fork handlers.
This fixed the issue that could cause the child process to stuck after fork.
2017-06-29 17:01:18 -07:00
Qi Wang
57beeb2fcb Switch ctl to explicitly use tsd instead of tsdn. 2017-06-23 13:27:53 -07:00
Qi Wang
425463a446 Check arena in current context in pre_reentrancy. 2017-06-23 13:27:53 -07:00
Qi Wang
d6eb8ac8f3 Set reentrancy when invoking customized extent hooks.
Customized extent hooks may malloc / free thus trigger reentry.  Support this
behavior by adding reentrancy on hook functions.
2017-06-23 13:27:53 -07:00
Qi Wang
a3f4977217 Add thread name for background threads. 2017-06-23 10:54:54 -07:00
Qi Wang
52fc887b49 Avoid inactivity_check within background threads.
Passing is_background_thread down the decay path, so that background thread
itself won't attempt inactivity_check.  This fixes an issue with background
thread doing trylock on a mutex it already owns.
2017-06-22 16:53:58 -07:00
Jason Evans
37f3fa0941 Mask signals during background thread creation.
This prevents signals from being inadvertently delivered to background
threads.
2017-06-20 17:47:38 -07:00
Qi Wang
9b1befabbb Add minimal initialized TSD.
We use the minimal_initilized tsd (which requires no cleanup) for free()
specifically, if tsd hasn't been initialized yet.

Any other activity will transit the state from minimal to normal.  This is to
workaround the case where a thread has no malloc calls in its lifetime until
during thread termination, free() happens after tls destructors.
2017-06-15 17:55:53 -07:00
Qi Wang
ae93fb08e2 Pass tsd to tcache_flush(). 2017-06-15 17:55:53 -07:00