Commit Graph

76 Commits

Author SHA1 Message Date
Qi Wang
ec532e2c5c Implement per-CPU arena.
The new feature, opt.percpu_arena, determines thread-arena association
dynamically based CPU id. Three modes are supported: "percpu", "phycpu"
and disabled.

"percpu" uses the current core id (with help from sched_getcpu())
directly as the arena index, while "phycpu" will assign threads on the
same physical CPU to the same arena. In other words, "percpu" means # of
arenas == # of CPUs, while "phycpu" has # of arenas == 1/2 * (# of
CPUs). Note that no runtime check on whether hyper threading is enabled
is added yet.

When enabled, threads will be migrated between arenas when a CPU change
is detected. In the current design, to reduce overhead from reading CPU
id, each arena tracks the thread accessed most recently. When a new
thread comes in, we will read CPU id and update arena if necessary.
2017-03-08 23:19:01 -08:00
Jason Evans
de49674fbd Use MALLOC_CONF rather than malloc_conf for tests.
malloc_conf does not reliably work with MSVC, which complains of
"inconsistent dll linkage", i.e. its inability to support the
application overriding malloc_conf when dynamically linking/loading.
Work around this limitation by adding test harness support for per test
shell script sourcing, and converting all tests to use MALLOC_CONF
instead of malloc_conf.
2017-02-23 08:57:02 -08:00
Jason Evans
c0cc5db871 Replace tabs following #define with spaces.
This resolves #564.
2017-01-20 21:45:53 -08:00
Jason Evans
f408643a4c Remove extraneous parens around return arguments.
This resolves #540.
2017-01-20 21:43:07 -08:00
Jason Evans
c4c2592c83 Update brace style.
Add braces around single-line blocks, and remove line breaks before
function-opening braces.

This resolves #537.
2017-01-20 21:43:07 -08:00
Jason Evans
8115f05b26 Add nullptr support to sized delete operators. 2017-01-17 14:30:15 -08:00
Jason Evans
ffbb7dac3d Remove leading blank lines from function bodies.
This resolves #535.
2017-01-13 14:49:24 -08:00
Jason Evans
3f291d59ad Refactor test extent hook code to be reusable.
Move test extent hook code from the extent integration test into a
header, and normalize the out-of-band controls and introspection.
Also refactor the base unit test to use the header.
2017-01-06 18:58:46 -08:00
Jason Evans
0f04bb1d6f Rename the arenas.extend mallctl to arenas.create. 2017-01-06 18:58:45 -08:00
Jason Evans
a0dd3a4483 Implement per arena base allocators.
Add/rename related mallctls:
- Add stats.arenas.<i>.base .
- Rename stats.arenas.<i>.metadata to stats.arenas.<i>.internal .
- Add stats.arenas.<i>.resident .

Modify the arenas.extend mallctl to take an optional (extent_hooks_t *)
argument so that it is possible for all base allocations to be serviced
by the specified extent hooks.

This resolves #463.
2016-12-26 18:08:28 -08:00
Jason Evans
a6e86810d8 Refactor purging and splitting/merging.
Split purging into lazy and forced variants.  Use the forced variant for
zeroing dss.

Add support for NULL function pointers as an opt-out mechanism for the
dalloc, commit, decommit, purge_lazy, purge_forced, split, and merge
fields of extent_hooks_t.

Add short-circuiting checks in large_ralloc_no_move_{shrink,expand}() so
that no attempt is made if splitting/merging is not supported.

This resolves #268.
2016-12-26 18:08:16 -08:00
Dave Watson
2319152d9f jemalloc cpp new/delete bindings
Adds cpp bindings for jemalloc, along with necessary autoconf settings.
This is mostly to add sized deallocation support, which can't be added
from C directly.  Sized deallocation is ~10% microbench improvement.

* Import ax_cxx_compile_stdcxx.m4 from the autoconf repo, seems like the
  easiest way to get c++14 detection.
* Adds various other changes, like CXXFLAGS, to configure.ac.
* Adds new rules to Makefile.in for src/jemalloc-cpp.cpp, and a basic
  unittest.
* Both new and delete are overridden, to ensure jemalloc is used for
  both.
* TODO future enhancement of avoiding extra PLT thunks for new and
  delete - sdallocx and malloc are publicly exported jemalloc symbols,
  using an alias would link them directly.  Unfortunately, was having
  trouble getting it to play nice with jemalloc's namespace support.

Testing:
Tested gcc 4.8, gcc 5, gcc 5.2, clang 4.0.  Only gcc >= 5 has sized
deallocation support, verified that the rest build correctly.

Tested mac osx and Centos.

Tested --with-jemalloc-prefix and --without-export.

This resolves #202.
2016-12-12 18:36:06 -08:00
Jason Evans
c25e711cf9 Reduce memory usage for sdallocx() test_alignment_and_size. 2016-11-11 23:50:35 -08:00
Jason Evans
bde815dc40 Reduce memory requirements for regression tests.
This is intended to drop memory usage to a level that AppVeyor test
instances can handle.

This resolves #393.
2016-10-28 11:23:24 -07:00
Jason Evans
970d293257 Periodically purge in memory-intensive integration tests.
This resolves #393.
2016-10-28 11:00:36 -07:00
Jason Evans
963289df13 Periodically purge in memory-intensive integration tests.
This resolves #393.
2016-10-28 10:44:39 -07:00
Jason Evans
977103c897 Uniformly cast mallctl[bymib]() oldp/newp arguments to (void *).
This avoids warnings in some cases, and is otherwise generally good
hygiene.
2016-10-27 21:31:25 -07:00
Jason Evans
d51139c33c Verify extent hook functions receive correct extent_hooks pointer. 2016-09-29 09:50:35 -07:00
Jason Evans
0c5cec833f Relax extent hook tests to work with unsplittable extents. 2016-06-05 22:30:31 -07:00
Jason Evans
487093d999 Fix regressions related extent splitting failures.
Fix a fundamental extent_split_wrapper() bug in an error path.

Fix extent_recycle() to deregister unsplittable extents before leaking
them.

Relax xallocx() test assertions so that unsplittable extents don't cause
test failures.
2016-06-05 22:08:20 -07:00
Jason Evans
42faa9e3e0 Work around legitimate xallocx() failures during testing.
With the removal of subchunk size class infrastructure, there are no
large size classes that are guaranteed to be re-expandable in place
unless munmap() is disabled.  Work around these legitimate failures with
rallocx() fallback calls.  If there were no test configuration for which
the xallocx() calls succeeded, it would be important to override the
extent hooks for testing purposes, but by default these tests don't use
the rallocx() fallbacks on Linux, so test coverage is still sufficient.
2016-06-05 21:00:02 -07:00
Jason Evans
f8f0542194 Modify extent hook functions to take an (extent_t *) argument.
This facilitates the application accessing its own extent allocator
metadata during hook invocations.

This resolves #259.
2016-06-05 21:00:02 -07:00
Jason Evans
37f0e34606 Reduce NSZS, since NSIZES (was nsizes) can not be so large. 2016-06-05 20:42:24 -07:00
Jason Evans
c8c3cbdf47 Miscellaneous s/chunk/extent/ updates. 2016-06-05 20:42:24 -07:00
Jason Evans
22588dda6e Rename most remaining *chunk* APIs to *extent*. 2016-06-05 20:42:23 -07:00
Jason Evans
9c305c9e5c s/chunk_hook/extent_hook/g 2016-06-05 20:42:23 -07:00
Jason Evans
7d63fed0fd Rename huge to large. 2016-06-05 20:42:23 -07:00
Jason Evans
ed2c2427a7 Use huge size class infrastructure for large size classes. 2016-06-05 20:42:18 -07:00
Jason Evans
4731cd47f7 Allow chunks to not be naturally aligned.
Precisely size extents for huge size classes that aren't multiples of
chunksize.
2016-06-03 12:27:41 -07:00
Jason Evans
3a9ec67626 Disable junk filling for tests that could otherwise easily OOM. 2016-05-11 00:52:16 -07:00
Jason Evans
9aa1543e9c Update mallocx() OOM test to deal with smaller hugemax.
Depending on virtual memory resource limits, it is necessary to attempt
allocating three maximally sized objects to trigger OOM rather than just
two, since the maximum supported size is slightly less than half the
total virtual memory address space.

This fixes a test failure that was introduced by
0c516a00c4 (Make *allocx() size class
overflow behavior defined.).

This resolves #379.
2016-05-03 09:37:54 -07:00
Jason Evans
0d970a054e Use separate arena for chunk tests.
This assures that side effects of internal allocation don't impact
tests.
2016-04-25 20:26:03 -07:00
Jason Evans
824b947be0 Add (size_t) casts to MALLOCX_ALIGN().
Add (size_t) casts to MALLOCX_ALIGN() macros so that passing the integer
constant 0x80000000 does not cause a compiler warning about invalid
shift amount.

This resolves #354.
2016-03-11 10:11:56 -08:00
Jason Evans
a62e94cabb Remove invalid tests.
Remove invalid tests that were intended to be tests of (hugemax+1) OOM,
for which tests already exist.
2016-02-26 16:27:52 -08:00
Jason Evans
e3195fa4a5 Cast PTRDIFF_MAX to size_t before adding 1.
This fixes compilation warnings regarding integer overflow that were
introduced by 0c516a00c4 (Make *allocx()
size class overflow behavior defined.).
2016-02-25 16:40:24 -08:00
Jason Evans
0c516a00c4 Make *allocx() size class overflow behavior defined.
Limit supported size and alignment to HUGE_MAXCLASS, which in turn is
now limited to be less than PTRDIFF_MAX.

This resolves #278 and #295.
2016-02-25 15:29:49 -08:00
Jason Evans
9e1810ca9d Silence miscellaneous 64-to-32-bit data loss warnings. 2016-02-24 13:03:48 -08:00
Jason Evans
b24f74b862 Don't rely on unpurged chunks in xallocx() test. 2016-02-19 17:02:25 -08:00
Jason Evans
fed1f9f367 Fix intermittent xallocx() test failures.
Modify xallocx() tests that expect to expand in place to use a separate
arena.  This avoids the potential for interposed internal allocations
from e.g. heap profile sampling to disrupt the tests.

This resolves #286.
2015-10-01 13:48:09 -07:00
Jason Evans
044047fae1 Remove fragile xallocx() test case.
In addition to depending on map coalescing, the test depended on
munmap() being disabled so that chunk recycling would always succeed.
2015-09-24 19:52:28 -07:00
Jason Evans
03eb37e8fd Make mallocx() OOM test more robust.
Make mallocx() OOM testing work correctly even on systems that can
allocate the majority of virtual address space in a single contiguous
region.
2015-09-24 16:44:16 -07:00
Jason Evans
d260f442ce Fix xallocx(..., MALLOCX_ZERO) bugs.
Zero all trailing bytes of large allocations when
--enable-cache-oblivious configure option is enabled.  This regression
was introduced by 8a03cf039c (Implement
cache index randomization for large allocations.).

Zero trailing bytes of huge allocations when resizing from/to a size
class that is not a multiple of the chunk size.
2015-09-24 16:38:45 -07:00
Jason Evans
21523297fc Add mallocx() OOM tests. 2015-09-17 15:27:28 -07:00
Jason Evans
65b940a3c5 Loosen expected xallocx() results.
Systems that do not support chunk split/merge cannot shrink/grow huge
allocations in place.
2015-09-15 15:48:42 -07:00
Jason Evans
aca490f004 Add more xallocx() overflow tests. 2015-09-15 14:39:29 -07:00
Jason Evans
560a4e1e01 Fix xallocx() bugs.
Fix xallocx() bugs related to the 'extra' parameter when specified as
non-zero.
2015-09-11 20:40:34 -07:00
Mike Hommey
4a2a3c9a6e Don't purge junk filled chunks when shrinking huge allocations
When junk filling is enabled, shrinking an allocation fills the bytes
that were previously allocated but now aren't. Purging the chunk before
doing that is just a waste of time.

This resolves #260.
2015-08-27 22:00:09 -07:00
Jason Evans
828d919b5e Fix test for MinGW. 2015-08-12 15:21:07 -07:00
Jason Evans
03bf5b67be Try to decommit new chunks.
Always leave decommit disabled on non-Windows systems.
2015-08-12 10:26:54 -07:00
Jason Evans
8fadb1a8c2 Implement chunk hook support for page run commit/decommit.
Cascade from decommit to purge when purging unused dirty pages, so that
it is possible to decommit cleaned memory rather than just purging.  For
non-Windows debug builds, decommit runs rather than purging them, since
this causes access of deallocated runs to segfault.

This resolves #251.
2015-08-07 00:50:58 -07:00