Commit Graph

179 Commits

Author SHA1 Message Date
Qi Wang
5742473cc8 Revert "Refactor prof log"
This reverts commit 7618b0b8e4.
2019-07-29 14:10:15 -07:00
Qi Wang
1a0503367b Revert "Refactor profiling"
This reverts commit 0b462407ae.
2019-07-29 14:10:15 -07:00
Yinan Zhang
0b462407ae Refactor profiling
Refactored core profiling codebase into two logical parts:

(a) `prof_data.c`: core internal data structure managing & dumping;
(b) `prof.c`: mutexes & outward-facing APIs.

Some internal functions had to be exposed out, but there are not
that many of them if the modularization is (hopefully) clean enough.
2019-07-29 13:55:00 -07:00
Yinan Zhang
7618b0b8e4 Refactor prof log
`prof.c` is growing too long, so trying to modularize it.  There are
a few internal functions that had to be exposed but I think it is a
fair trade-off.
2019-07-29 13:55:00 -07:00
Fabrice Fontaine
702d76dbd0 configure.ac: Add an option to disable doc
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
2019-04-23 15:32:02 -07:00
David Goldblatt
33e1dad680 Safety checks: Add a redzoning feature. 2019-04-15 16:48:12 -07:00
David Goldblatt
b92c9a1a81 Safety checks: Indirect through a function.
This will let us share code on failure pathways.pathways
2019-04-15 16:48:12 -07:00
Yinan Zhang
7ee3897740 Separate tests for extent utilization API
As title.
2019-04-10 13:03:20 -07:00
Qi Wang
9015deb126 Add build_doc by default.
However, skip building the docs (and output warnings) if XML support is missing.
This allows `make install` to succeed w/o `make dist`.
2019-02-08 14:13:20 -08:00
Faidon Liambotis
471191075d Replace -lpthread with -pthread
This automatically adds -latomic if and when needed, e.g. on riscv64
systems.

Fixes #1401.
2019-01-09 13:43:33 -08:00
John Ericson
4e920d2c9d Add --{enable,disable}-{static,shared} to configure script
My distro offers a custom toolchain where it's not possible to make
static libs, so it's insufficient to just delete the libs I don't want.
I actually need to avoid building them in the first place.
2018-12-19 13:34:26 -08:00
Qi Wang
711a61f3b4 Add unit test for sharded bins. 2018-12-03 17:17:03 -08:00
Dave Watson
2b112ea593 add test for zero-sized alloc and aligned alloc 2018-10-17 08:50:58 -07:00
gnzlbg
730e57b08f Adapts mallocx integration tests for smallocx 2018-10-17 07:12:28 -07:00
David Goldblatt
1f71e1ca43 Add hook microbenchmark. 2018-08-09 13:16:54 -07:00
Tyler Etzel
5e23f96dd4 Add unit tests for logging 2018-08-01 13:27:11 -07:00
David T. Goldblatt
5112d9e5fd Add MALLOC_CONF parsing for dynamic slab sizes.
This actually enables us to change the values.
2018-07-12 20:53:06 -07:00
David T. Goldblatt
a7f68aed3e SC: Add page customization functionality. 2018-07-12 20:53:06 -07:00
David Goldblatt
2f07e92adb Add lg_ceil to bit_util.
Also, add the bit_util test back to the Makefile.
2018-07-12 20:53:06 -07:00
David Goldblatt
e904f813b4 Hide size class computation behind a layer of indirection.
This class removes almost all the dependencies on size_classes.h, accessing the
data there only via the new module sc.h, which does not depend on any
configuration options.

In a subsequent commit, we'll remove the configure-time size class computations,
doing them at boot time, instead.
2018-07-12 20:53:06 -07:00
Qi Wang
ff622eeab5 Add unit test for opt.huge_threshold. 2018-06-29 10:35:02 -07:00
David Goldblatt
5ae6e7cbfa Add "hook" module.
The hook module allows a low-reader-overhead way of finding hooks to invoke and
calling them.

For now, none of the allocation pathways are tied into the hooks; this will come
later.
2018-05-18 11:43:03 -07:00
David Goldblatt
06a8c40b36 Add the Seq module, a simple seqlock implementation.
This allows fast reader-writer concurrency in cases where writers are rare.  The
immediate use case is for the hooking implementaiton.
2018-05-18 11:43:03 -07:00
David Goldblatt
c7a87e0e0b Rename hooks module to test_hooks.
"Hooks" is really the best name for the module that will contain the publicly
exposed hooks.  So lets rename the current "hooks" module (that hook external
dependencies, for reentrancy testing) to "test_hooks".
2018-05-18 11:43:03 -07:00
Christoph Muellner
b73380bee0 Fix include path order for out-of-tree builds.
When configuring out-of-tree (source directory is not build directory),
the generated include files from the build directory should have higher
priority than those in the source dir.

This is especially helpful when cross-compiling.

Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
2018-05-05 10:11:22 -07:00
David Goldblatt
27a8fe6780 Introduce the emitter module.
The emitter can be used to produce structured json or tabular output.  For now
it has no uses; in subsequent commits, I'll begin transitioning stats printing
code over.
2018-03-09 11:47:17 -08:00
David Goldblatt
26b1c13982 Background threads: fix an indexing bug.
We have a buffer overrun that manifests in the case where arena indices higher
than the number of CPUs are accessed before arena indices lower than the number
of CPUs.  This fixes the bug and adds a test.
2018-02-27 19:43:05 -08:00
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
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
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 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
David Goldblatt
8261e581be Header refactoring: Pull size helpers out of jemalloc module. 2017-05-31 13:08:45 -07:00
Jason Evans
4f0963b883 Add test for excessive retained memory. 2017-05-29 17:27:18 -07:00
Qi Wang
2c368284d2 Add tests for background threads. 2017-05-23 12:26:20 -07:00
Qi Wang
b693c7868e Implementing opt.background_thread.
Added opt.background_thread to enable background threads, which handles purging
currently.  When enabled, decay ticks will not trigger purging (which will be
left to the background threads).  We limit the max number of threads to NCPUs.
When percpu arena is enabled, set CPU affinity for the background threads as
well.

The sleep interval of background threads is dynamic and determined by computing
number of pages to purge in the future (based on backlog).
2017-05-23 12:26:20 -07:00
David Goldblatt
3f685e8824 Protect the rtree/extent interactions with a mutex pool.
Instead of embedding a lock bit in rtree leaf elements, we associate extents
with a small set of mutexes.  This gets us two things:

- We can use the system mutexes.  This (hypothetically) protects us from
  priority inversion, and lets us stop doing a backoff/sleep loop, instead
  opting for precise wakeups from the mutex.
- Cuts down on the number of mutex acquisitions we have to do (from 4 in the
  worst case to two).

We end up simplifying most of the rtree code (which no longer has to deal with
locking or concurrency at all), at the cost of additional complexity in the
extent code: since the mutex protecting the rtree leaf elements is determined by
reading the extent out of those elements, the initial read is racy, so that we
may acquire an out of date mutex.  We re-check the extent in the leaf after
acquiring the mutex to protect us from this race.
2017-05-19 14:21:27 -07:00
Jason Evans
6e62c62862 Refactor *decay_time into *decay_ms.
Support millisecond resolution for decay times.  Among other use cases
this makes it possible to specify a short initial dirty-->muzzy decay
phase, followed by a longer muzzy-->clean decay phase.

This resolves #812.
2017-05-18 11:33:45 -07:00
Jason Evans
04fec5e084 Avoid over-rebuilding due to namespace mangling.
Take care not to touch generated namespace mangling headers unless their
contents would change.

This resolves #838.
2017-05-17 10:06:58 -07:00
Qi Wang
b8ba3c3132 Use srcroot path for private_namespace.sh. 2017-05-16 09:30:33 -07:00
Jason Evans
909f0482e4 Automatically generate private symbol name mangling macros.
Rather than using a manually maintained list of internal symbols to
drive name mangling, add a compilation phase to automatically extract
the list of internal symbols.

This resolves #677.
2017-05-11 23:06:54 -07:00
Jason Evans
e2cc6280ed Remove --enable-code-coverage.
This option hasn't been particularly useful since the original pre-3.0.0
push to broaden test coverage.

This partially resolves #580.
2017-04-24 16:33:04 -07:00
David Goldblatt
0a0fcd3e6a Add hooking functionality
This allows us to hook chosen functions and do interesting things there (in
particular: reentrancy checking).
2017-04-07 14:10:27 -07:00
Jason Evans
64e458f5cd Implement two-phase decay-based purging.
Split decay-based purging into two phases, the first of which uses lazy
purging to convert dirty pages to "muzzy", and the second of which uses
forced purging, decommit, or unmapping to convert pages to clean or
destroy them altogether.  Not all operating systems support lazy
purging, yet the application may provide extent hooks that implement
lazy purging, so care must be taken to dynamically omit the first phase
when necessary.

The mallctl interfaces change as follows:
- opt.decay_time --> opt.{dirty,muzzy}_decay_time
- arena.<i>.decay_time --> arena.<i>.{dirty,muzzy}_decay_time
- arenas.decay_time --> arenas.{dirty,muzzy}_decay_time
- stats.arenas.<i>.pdirty --> stats.arenas.<i>.p{dirty,muzzy}
- stats.arenas.<i>.{npurge,nmadvise,purged} -->
  stats.arenas.<i>.{dirty,muzzy}_{npurge,nmadvise,purged}

This resolves #521.
2017-03-15 13:13:47 -07:00
David Goldblatt
e9852b5776 Disentangle assert and util
This is the first header refactoring diff, #533.  It splits the assert and util
components into separate, hermetic, header files.  In the process, it splits out
two of the large sub-components of util (the stdio.h replacement, and bit
manipulation routines) into their own components (malloc_io.h and bit_util.h).
This is mostly to break up cyclic dependencies, but it also breaks off a good
chunk of the catch-all-ness of util, which is nice.
2017-03-06 15:08:43 -08:00
David Goldblatt
d4ac7582f3 Introduce a backport of C11 atomics
This introduces a backport of C11 atomics.  It has four implementations; ranked
in order of preference, they are:
- GCC/Clang __atomic builtins
- GCC/Clang __sync builtins
- MSVC _Interlocked builtins
- C11 atomics, from <stdatomic.h>

The primary advantages are:
- Close adherence to the standard API gives us a defined memory model.
- Type safety: atomic objects are now separate types from non-atomic ones, so
  that it's impossible to mix up atomic and non-atomic updates (which is
  undefined behavior that compilers are starting to take advantage of).
- Efficiency: we can specify ordering for operations, avoiding fences and
  atomic operations on strongly ordered architectures (example:
  `atomic_write_u32(ptr, val);` involves a CAS loop, whereas
  `atomic_store(ptr, val, ATOMIC_RELEASE);` is a plain store.

This diff leaves in the current atomics API (implementing them in terms of the
backport).  This lets us transition uses over piecemeal.

Testing:
This is by nature hard to test. I've manually tested the first three options on
Linux on gcc by futzing with the #defines manually, on freebsd with gcc and
clang, on MSVC, and on OS X with clang.  All of these were x86 machines though,
and we don't have any test infrastructure set up for non-x86 platforms.
2017-03-03 13:40:59 -08:00
Jason Evans
8ac7937eb5 Remove remainder of mb (memory barrier).
This complements 94c5d22a4d (Remove mb.h,
which is unused).
2017-02-22 00:24:14 -08:00
Jason Evans
de8a68e853 Enhance spin_adaptive() to yield after several iterations.
This avoids worst case behavior if e.g. another thread is preempted
while owning the resource the spinning thread is waiting for.
2017-02-08 18:50:03 -08:00
Jason Evans
66bf773ef2 Test JSON output of malloc_stats_print() and fix bugs.
Implement and test a JSON validation parser.  Use the parser to validate
JSON output from malloc_stats_print(), with a significant subset of
supported output options.

This resolves #551.
2017-01-19 14:05:00 -08:00
Jason Evans
1ff09534b5 Fix prof_realloc() regression.
Mostly revert the prof_realloc() changes in
498856f44a (Move slabs out of chunks.) so
that prof_free_sampled_object() is called when appropriate.  Leave the
prof_tctx_[re]set() optimization in place, but add an assertion to
verify that all eight cases are correctly handled.  Add a comment to
make clear the code ordering, so that the regression originally fixed by
ea8d97b897 (Fix
prof_{malloc,free}_sample_object() call order in prof_realloc().) is not
repeated.

This resolves #499.
2017-01-17 15:16:37 -08:00
Jason Evans
edf1bafb2b Implement arena.<i>.destroy .
Add MALLCTL_ARENAS_DESTROYED for accessing destroyed arena stats as an
analogue to MALLCTL_ARENAS_ALL.

This resolves #382.
2017-01-06 18:58:46 -08:00