Commit Graph

205 Commits

Author SHA1 Message Date
Jason Evans
1628e8615e Add rb_empty(). 2014-08-19 21:05:54 -07:00
Jason Evans
3a81cbd2d4 Dump heap profile backtraces in a stable order.
Also iterate over per thread stats in a stable order, which prepares the
way for stable ordering of per thread heap profile dumps.
2014-08-19 21:05:54 -07:00
Jason Evans
ab532e9799 Directly embed prof_ctx_t's bt. 2014-08-19 21:05:54 -07:00
Jason Evans
b41ccdb125 Convert prof_tdata_t's bt2cnt to a comprehensive map.
Treat prof_tdata_t's bt2cnt as a comprehensive map of the thread's
extant allocation samples (do not limit the total number of entries).
This helps prepare the way for per thread heap profiling.
2014-08-19 21:05:54 -07:00
Jason Evans
070b3c3fbd Fix and refactor runs_dirty-based purging.
Fix runs_dirty-based purging to also purge dirty pages in the spare
chunk.

Refactor runs_dirty manipulation into arena_dirty_{insert,remove}(), and
move the arena->ndirty accounting into those functions.

Remove the u.ql_link field from arena_chunk_map_t, and get rid of the
enclosing union for u.rb_link, since only rb_link remains.

Remove the ndirty field from arena_chunk_t.
2014-08-14 14:45:58 -07:00
Qinfan Wu
e8a2fd83a2 arena->npurgatory is no longer needed since we drop arena's lock
after stashing all the purgeable runs.
2014-08-12 09:50:01 -07:00
Qinfan Wu
90737fcda1 Remove chunks_dirty tree, nruns_avail and nruns_adjac since we no
longer need to maintain the tree for dirty page purging.
2014-08-12 09:50:00 -07:00
Qinfan Wu
04d60a132b Maintain all the dirty runs in a linked list for each arena 2014-08-12 09:50:00 -07:00
Jason Evans
a2ea54c986 Add atomic operations tests and fix latent bugs. 2014-08-06 23:36:19 -07:00
Manuel A. Fernandez Montecelo
ffa259841c Add OpenRISC/or1k LG_QUANTUM size definition 2014-07-29 23:11:26 +01:00
Mike Hommey
c521df5dcf Allow to build with clang-cl 2014-06-12 10:39:39 -07:00
Richard Diamond
994fad9bda Add check for madvise(2) to configure.ac.
Some platforms, such as Google's Portable Native Client, use Newlib and
thus lack access to madvise(2).  In those instances, pages_purge() is
transformed into a no-op.
2014-06-03 09:32:49 -07:00
Richard Diamond
9c3a10fdf6 Try to use __builtin_ffsl if ffsl is unavailable.
Some platforms (like those using Newlib) don't have ffs/ffsl.  This
commit adds a check to configure.ac for __builtin_ffsl if ffsl isn't
found.  __builtin_ffsl performs the same function as ffsl, and has the
added benefit of being available on any platform utilizing
Gcc-compatible compiler.

This change does not address the used of ffs in the MALLOCX_ARENA()
macro.
2014-06-02 07:44:50 -07:00
Jason Evans
0b5c92213f Fix fallback lg_floor() implementations. 2014-06-01 22:05:08 -07:00
Mike Hommey
ff2e999667 Don't use msvc_compat's C99 headers with MSVC versions that have (some) C99 support 2014-06-01 20:53:35 -07:00
Jason Evans
1f6d77e1f6 Use KQU() rather than QU() where applicable.
Fix KZI() and KQI() to append LL rather than ULL.
2014-05-28 21:17:42 -07:00
Jason Evans
d04047cc29 Add size class computation capability.
Add size class computation capability, currently used only as validation
of the size class lookup tables.  Generalize the size class spacing used
for bins, for eventual use throughout the full range of allocation
sizes.
2014-05-28 21:06:46 -07:00
Mike Hommey
12f74e680c Move platform headers and tricks from jemalloc_internal.h.in to a new jemalloc_internal_decls.h header 2014-05-28 09:38:10 -07:00
Mike Hommey
22bc570fba Move __func__ to jemalloc_internal_macros.h
test/integration/aligned_alloc.c needs it.
2014-05-27 15:52:49 -07:00
Mike Hommey
a9df1ae622 Use ULL prefix instead of LLU for unsigned long longs
MSVC only supports the former.
2014-05-27 15:45:14 -07:00
Jason Evans
e2deab7a75 Refactor huge allocation to be managed by arenas.
Refactor huge allocation to be managed by arenas (though the global
red-black tree of huge allocations remains for lookup during
deallocation).  This is the logical conclusion of recent changes that 1)
made per arena dss precedence apply to huge allocation, and 2) made it
possible to replace the per arena chunk allocation/deallocation
functions.

Remove the top level huge stats, and replace them with per arena huge
stats.

Normalize function names and types to *dalloc* (some were *dealloc*).

Remove the --enable-mremap option.  As jemalloc currently operates, this
is a performace regression for some applications, but planned work to
logarithmically space huge size classes should provide similar amortized
performance.  The motivation for this change was that mremap-based huge
reallocation forced leaky abstractions that prevented refactoring.
2014-05-15 22:36:41 -07:00
aravind
fb7fe50a88 Add support for user-specified chunk allocators/deallocators.
Add new mallctl endpoints "arena<i>.chunk.alloc" and
"arena<i>.chunk.dealloc" to allow userspace to configure
jemalloc's chunk allocator and deallocator on a per-arena
basis.
2014-05-12 10:46:03 -07:00
Jason Evans
6f001059aa Simplify backtracing.
Simplify backtracing to not ignore any frames, and compensate for this
in pprof in order to increase flexibility with respect to function-based
refactoring even in the presence of non-deterministic inlining.  Modify
pprof to blacklist all jemalloc allocation entry points including
non-standard ones like mallocx(), and ignore all allocator-internal
frames.  Prior to this change, pprof excluded the specifically
blacklisted functions from backtraces, but it left allocator-internal
frames intact.
2014-04-22 20:55:09 -07:00
Lucian Adrian Grijincu
9d4e13f45a prof_backtrace: use unw_backtrace
unw_backtrace:
- does internal per-thread caching
- doesn't acquire an internal lock
2014-04-22 18:39:47 -07:00
Jason Evans
3541a904d6 Refactor small_size2bin and small_bin2size.
Refactor small_size2bin and small_bin2size to be inline functions rather
than directly accessed arrays.
2014-04-16 17:14:33 -07:00
Jason Evans
0b49403958 Fix debug-only compilation failures.
Fix debug-only compilation failures introduced by changes to
prof_sample_accum_update() in:

    6c39f9e059
    refactor profiling. only use a bytes till next sample variable.
2014-04-16 16:38:22 -07:00
Jason Evans
3e3caf03af Merge pull request #73 from bmaurer/smallmalloc
Smaller malloc hot path
2014-04-16 16:33:21 -07:00
Ben Maurer
021136ce4d Create a const array with only a small bin to size map 2014-04-16 14:31:24 -07:00
Ben Maurer
6c39f9e059 refactor profiling. only use a bytes till next sample variable. 2014-04-16 13:43:30 -07:00
Ben Maurer
a7619b7fa5 outline rare tcache_get codepaths 2014-04-16 13:36:56 -07:00
Jason Evans
bd87b01999 Optimize Valgrind integration.
Forcefully disable tcache if running inside Valgrind, and remove
Valgrind calls in tcache-specific code.

Restructure Valgrind-related code to move most Valgrind calls out of the
fast path functions.

Take advantage of static knowledge to elide some branches in
JEMALLOC_VALGRIND_REALLOC().
2014-04-15 16:49:57 -07:00
Jason Evans
ecd3e59ca3 Remove the "opt.valgrind" mallctl.
Remove the "opt.valgrind" mallctl because it is unnecessary -- jemalloc
automatically detects whether it is running inside valgrind.
2014-04-15 14:33:50 -07:00
Jason Evans
4d434adb14 Make dss non-optional, and fix an "arena.<i>.dss" mallctl bug.
Make dss non-optional on all platforms which support sbrk(2).

Fix the "arena.<i>.dss" mallctl to return an error if "primary" or
"secondary" precedence is specified, but sbrk(2) is not supported.
2014-04-15 12:09:48 -07:00
Jason Evans
9790b9667f Remove the *allocm() API, which is superceded by the *allocx() API. 2014-04-14 22:32:31 -07:00
Jason Evans
9b0cbf0850 Remove support for non-prof-promote heap profiling metadata.
Make promotion of sampled small objects to large objects mandatory, so
that profiling metadata can always be stored in the chunk map, rather
than requiring one pointer per small region in each small-region page
run.  In practice the non-prof-promote code was only useful when using
jemalloc to track all objects and report them as leaks at program exit.
However, Valgrind is at least as good a tool for this particular use
case.

Furthermore, the non-prof-promote code is getting in the way of
some optimizations that will make heap profiling much cheaper for the
predominant use case (sampling a small representative proportion of all
allocations).
2014-04-11 14:24:51 -07:00
Ben Maurer
be8e59f5a6 Don't dereference chunk->arena in free() hot path
When you call free() we load chunk->arena even though that
data isn't used on the tcache hot path.

In profiling some FB applications, I found that ~30% of the
dTLB misses in the free() function come from this line. With
4 MB chunks, the arena_chunk_t->map is ~ 32 KB (1024 pages
in the chunk, 4 8 byte pointers in arena_chunk_map_t). This
means there's only a 1/8 chance of the page containing
chunk->arena also comtaining the map bits.
2014-04-05 15:59:08 -07:00
Jason Evans
8a26eaca7f Add private namespace mangling for huge_dss_prec_get(). 2014-03-31 09:31:38 -07:00
Jason Evans
df3f27024f Adapt hash tests to big-endian systems.
The hash code, which has MurmurHash3 at its core, generates different
output depending on system endianness, so adapt the expected output on
big-endian systems.  MurmurHash3 code also makes the assumption that
unaligned access is okay (not true on all systems), but jemalloc only
hashes data structures that have sufficient alignment to dodge this
limitation.
2014-03-30 16:27:08 -07:00
Max Wang
fbb31029a5 Use arena dss prec instead of default for huge allocs.
Pass a dss_prec_t parameter to huge_{m,p,r}alloc instead of defaulting
to the chunk dss prec.
2014-03-28 13:43:58 -07:00
Jason Evans
99b0fbbe69 Add workaround for missing 'restrict' keyword.
Add a cpp #define that removes 'restrict' keyword usage unless the
compiler definitely supports C99.  As written, 'restrict' is only
enabled if the compiler supports the -std=gnu99 option (e.g. gcc and
llvm).

Reported by Tobias Hieta.
2014-02-24 16:08:38 -08:00
Jason Evans
5f60afa01e Avoid a compiler warning.
Avoid copying "jeprof" to a 1-byte buffer within prof_boot0() when heap
profiling is disabled.  Although this is dead code under such
conditions, the compiler doesn't figure that part out.

Reported by Eduardo Silva.
2014-01-28 23:04:02 -08:00
Jason Evans
0dec3507c6 Remove __FBSDID from rb.h. 2014-01-21 20:49:58 -08:00
Jason Evans
772163b4f3 Add heap profiling tests.
Fix a regression in prof_dump_ctx() due to an uninitized variable.  This
was caused by revision 4f37ef693e, so no
releases are affected.
2014-01-17 15:40:52 -08:00
Jason Evans
eefdd02e70 Fix a variable prototype/definition mismatch. 2014-01-16 18:04:30 -08:00
Jason Evans
f234dc51b9 Fix name mangling for stress tests.
Fix stress tests such that testlib code uses the jet_ allocator, but
test code uses libjemalloc.

Generate jemalloc_{rename,mangle}.h, the former because it's needed for
the stress test name mangling fix, and the latter for consistency.  As
an artifact of this change, some (but not all) definitions related to
the experimental API are absent from the headers unless the feature is
enabled at configure time.
2014-01-16 17:38:01 -08:00
Jason Evans
4f37ef693e Refactor prof_dump() to reduce contention.
Refactor prof_dump() to use a two pass algorithm, and prof_leave() prior
to the second pass.  This avoids write(2) system calls while holding
critical prof resources.

Fix prof_dump() to close the dump file descriptor for all relevant error
paths.

Minimize the size of prof-related static buffers when prof is disabled.
This saves roughly 65 KiB of application memory for non-prof builds.

Refactor prof_ctx_init() out of prof_lookup_global().
2014-01-16 13:36:38 -08:00
Jason Evans
aa5113b1fd Refactor overly large/complex functions.
Refactor overly large functions by breaking out helper functions.

Refactor overly complex multi-purpose functions into separate more
specific functions.
2014-01-14 16:23:03 -08:00
Jason Evans
b2c31660be Extract profiling code from [re]allocation functions.
Extract profiling code from malloc(), imemalign(), calloc(), realloc(),
mallocx(), rallocx(), and xallocx().  This slightly reduces the amount
of code compiled into the fast paths, but the primary benefit is the
combinatorial complexity reduction.

Simplify iralloc[t]() by creating a separate ixalloc() that handles the
no-move cases.

Further simplify [mrxn]allocx() (and by implication [mrn]allocm()) to
make request size overflows due to size class and/or alignment
constraints trigger undefined behavior (detected by debug-only
assertions).

Report ENOMEM rather than EINVAL if an OOM occurs during heap profiling
backtrace creation in imemalign().  This bug impacted posix_memalign()
and aligned_alloc().
2014-01-12 15:41:05 -08:00
Jason Evans
6b694c4d47 Add junk/zero filling unit tests, and fix discovered bugs.
Fix growing large reallocation to junk fill new space.

Fix huge deallocation to junk fill when munmap is disabled.
2014-01-07 16:54:17 -08:00
Jason Evans
e18c25d23d Add util unit tests, and fix discovered bugs.
Add unit tests for pow2_ceil(), malloc_strtoumax(), and
malloc_snprintf().

Fix numerous bugs in malloc_strotumax() error handling/reporting.  These
bugs could have caused application-visible issues for some seldom used
(0X... and 0... prefixes) or malformed MALLOC_CONF or mallctl() argument
strings, but otherwise they had no impact.

Fix numerous bugs in malloc_snprintf().  These bugs were not exercised
by existing malloc_*printf() calls, so they had no impact.
2014-01-06 20:41:09 -08:00