Commit Graph

478 Commits

Author SHA1 Message Date
Yinan Zhang
152c0ef954 Build a general purpose thread event handler 2019-11-04 11:15:50 -08:00
David T. Goldblatt
de81a4eada Add stats counters for number of zero reallocs 2019-10-29 17:48:44 -07:00
David T. Goldblatt
9cfa805947 Realloc: Make behavior of realloc(ptr, 0) configurable. 2019-10-29 17:48:44 -07:00
Yinan Zhang
bd6e28d6a3 Guard slabcur fetching in extent_util 2019-10-28 17:27:51 -07:00
Qi Wang
4094b7c03f Limit # of iters of test_bitmap_xfu.
Otherwise the test is too slow for higher page sizes such as 64k.
2019-10-09 11:15:37 -07:00
Yinan Zhang
beb7c16e94 Guard prof_active reset by opt_prof
Set `prof_active` to read-only when `opt_prof` is turned off.
2019-10-02 11:42:53 -07:00
David T. Goldblatt
820f070c6b Move page quantization to sz module. 2019-09-23 23:06:27 -07:00
David T. Goldblatt
41187bdfb0 Extents: Break extent-struct/arena interactions
Specifically, the extent_arena_[g|s]et functions and the address randomization.

These are the only things that tie the extent struct itself to the arena code.
2019-09-23 23:06:27 -07:00
zhxchen17
4b76c684bb Add "prof.dump_prefix" to override filename prefixes for dumps. 2019-09-12 22:26:03 -07:00
Qi Wang
22bc75ee3e Workaround the stringop-overflow check false positives. 2019-09-09 11:35:04 -07:00
Qi Wang
0043e68d4c Track low_water == -1 case explicitly.
The -1 value of low_water indicates if the cache has been depleted and
refilled.  Track the status explicitly in the tcache struct.

This allows the fast path to check if (cur_ptr > low_water), instead of >=,
which avoids reaching slow path when the last item is allocated.
2019-08-21 16:00:38 -07:00
Qi Wang
937ca1db9f Store ncached_max * ptr_size in tcache_bin_info.
With the cache bin metadata switched to pointers, ncached_max is usually
accessed and timed by sizeof(ptr). Store the results in tcache_bin_info for
direct access, and add a helper function for the ncached_max value.
2019-08-19 12:23:24 -07:00
Qi Wang
7599c82d48 Redesign the cache bin metadata for fast path.
Implement the pointer-based metadata for tcache bins --
- 3 pointers are maintained to represent each bin;
- 2 of the pointers are compressed on 64-bit;
- is_full / is_empty done through pointer comparison;

Comparing to the previous counter based design --
- fast-path speed up ~15% in benchmarks
- direct pointer comparison and de-reference
- no need to access tcache_bin_info in common case
2019-08-19 12:21:44 -07:00
Yinan Zhang
ad3f7dbfa0 Buffer prof_log_stop
Make use of the new buffered writer for the output of `prof_log_stop`.
2019-08-12 09:06:01 -07:00
Yinan Zhang
8c8466fa6e Add compact json option for emitter
JSON format is largely meant for machine-machine communication, so
adding the option to the emitter.  According to local testing, the
savings in terms of bytes outputted is around 50% for stats printing
and around 25% for prof log printing.
2019-08-09 09:53:41 -07:00
Yinan Zhang
7fc6b1b259 Add buffered writer
The buffered writer adopts a signature identical to `write_cb`,
so that it can be plugged into anywhere `write_cb` appears.
2019-08-09 09:44:29 -07:00
Qi Wang
10fcff6c38 Lower nthreads in test/unit/retained on 32-bit to avoid OOM. 2019-07-25 13:10:03 -07:00
Qi Wang
9a86c65abc Implement retain on Windows.
The VirtualAlloc and VirtualFree APIs are different because MEM_DECOMMIT cannot
be used across multiple VirtualAlloc regions.  To properly support decommit,
only allow merge / split within the same region -- this is done by tracking the
"is_head" state of extents and not merging cross-region.

Add a new state is_head (only relevant for retain && !maps_coalesce), which is
true for the first extent in each VirtualAlloc region.  Determine if two extents
can be merged based on the head state, and use serial numbers for sanity checks.
2019-07-23 22:18:55 -07:00
Qi Wang
f32f23d6cc Fix posix_memalign with input size 0.
Return a valid pointer instead of failed assertion.
2019-07-18 00:43:23 -07:00
Yinan Zhang
c92ac30601 Add confirm_conf option
If the confirm_conf option is set, when the program starts, each of
the four malloc_conf strings will be printed, and each option will
be printed when being set.
2019-05-22 09:38:39 -07:00
Yinan Zhang
4c63b0e76a Improve memory utilization tests
Added tests for large size classes and expanded the tests to
cover wider range of allocation sizes.
2019-05-21 12:57:06 -07:00
Doron Roberts-Kedes
7fc4f2a32c Add nonfull_slabs to bin_stats_t.
When config_stats is enabled track the size of bin->slabs_nonfull in
the new nonfull_slabs counter in bin_stats_t. This metric should be
useful for establishing an upper ceiling on the savings possible by
meshing.
2019-04-29 13:35:02 -07:00
David Goldblatt
33e1dad680 Safety checks: Add a redzoning feature. 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
c2a3a7cd3f Fix test/unit/prof_log
Compiler optimizations may produce traces more than expected.  Instead verify
the lower bound only.
2019-04-05 13:47:10 -07:00
Yinan Zhang
9aab3f2be0 Add memory utilization analytics to mallctl
The analytics tool is put under experimental.utilization namespace in
mallctl.  Input is one pointer or an array of pointers and the output
is a list of memory utilization statistics.
2019-04-04 13:48:39 -07:00
Qi Wang
6fe11633b0 Fix the binshard unit test.
The test attempts to trigger usage of multiple sharded bins, which percpu_arena
makes it less reliable.
2019-04-02 16:53:00 -07:00
Qi Wang
fb56766ca9 Eagerly purge oversized merged extents.
This change improves memory usage slightly, at virtually no CPU cost.
2019-03-14 17:34:55 -07:00
Qi Wang
e3db480f6f Rename huge_threshold to oversize_threshold.
The keyword huge tend to remind people of huge pages which is not relevent to
the feature.
2019-01-25 13:15:45 -08:00
Qi Wang
d3145014a0 Explicitly use arena 0 in alignment and OOM tests.
This helps us avoid issues with size based routing (i.e. the huge_threshold
feature).
2019-01-24 13:29:23 -08:00
Qi Wang
7a815c1b7c Un-experimental the huge_threshold feature. 2019-01-16 12:28:57 -08:00
Qi Wang
441335d924 Add unit test for producer-consumer pattern. 2018-12-18 15:09:53 -08:00
Qi Wang
711a61f3b4 Add unit test for sharded bins. 2018-12-03 17:17:03 -08:00
Qi Wang
45bb4483ba Add stats for arenas.bin.i.nshards. 2018-12-03 17:17:03 -08:00
Qi Wang
43f3b1ad0c Deprecate OSSpinLock. 2018-11-14 08:44:05 -08:00
Dave Watson
2b112ea593 add test for zero-sized alloc and aligned alloc 2018-10-17 08:50:58 -07:00
gnzlbg
01e2a38e5a Make smallocx symbol name depend on the JEMALLOC_VERSION_GID
This comments concatenates the `JEMALLOC_VERSION_GID` to the
`smallocx` symbol name, such that the symbol ends up exported
as `smallocx_{git_hash}`.
2018-10-17 07:12:28 -07:00
gnzlbg
741fca1bb7 Hide smallocx even when enabled from the library API
The experimental `smallocx` API is not exposed via header files,
requiring the users to peek at `jemalloc`'s source code to manually
add the external declarations to their own programs.

This should reinforce that `smallocx` is experimental, and that `jemalloc`
does not offer any kind of backwards compatiblity or ABI gurantees for it.
2018-10-17 07:12:28 -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
Tyler Etzel
eb261e53a6 Small refactoring of emitter
- Make API more clear for using as standalone json emitter
- Support cases that weren't possible before, e.g.
	- emitting primitive values in an array
	- emitting nested arrays
2018-08-01 13:27:11 -07:00
David Goldblatt
3aba072cef SC: Remove global data.
The global data is mostly only used at initialization, or for easy access to
values we could compute statically.  Instead of consuming that space (and
risking TLB misses), we can just pass around a pointer to stack data during
bootstrapping.
2018-07-23 13:37:08 -07:00
David Goldblatt
55e5cc1341 SC: Make some key size classes static.
The largest small class, smallest large class, and largest large class may all
be needed down fast paths; to avoid the risk of touching another cache line, we
can make them available as constants.
2018-07-12 20:53:06 -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
gnzlbg
3d29d11ac2 Clean compilation -Wextra
Before this commit jemalloc produced many warnings when compiled with -Wextra
with both Clang and GCC. This commit fixes the issues raised by these warnings
or suppresses them if they were spurious at least for the Clang and GCC
versions covered by CI.

This commit:

* adds `JEMALLOC_DIAGNOSTIC` macros: `JEMALLOC_DIAGNOSTIC_{PUSH,POP}` are
  used to modify the stack of enabled diagnostics. The
  `JEMALLOC_DIAGNOSTIC_IGNORE_...` macros are used to ignore a concrete
  diagnostic.

* adds `JEMALLOC_FALLTHROUGH` macro to explicitly state that falling
  through `case` labels in a `switch` statement is intended

* Removes all UNUSED annotations on function parameters. The warning
  -Wunused-parameter is now disabled globally in
  `jemalloc_internal_macros.h` for all translation units that include
  that header. It is never re-enabled since that header cannot be
  included by users.

* locally suppresses some -Wextra diagnostics:

  * `-Wmissing-field-initializer` is buggy in older Clang and GCC versions,
    where it does not understanding that, in C, `= {0}` is a common C idiom
    to initialize a struct to zero

  * `-Wtype-bounds` is suppressed in a particular situation where a generic
    macro, used in multiple different places, compares an unsigned integer for
    smaller than zero, which is always true.

  * `-Walloc-larger-than-size=` diagnostics warn when an allocation function is
    called with a size that is too large (out-of-range). These are suppressed in
    the parts of the tests where `jemalloc` explicitly does this to test that the
    allocation functions fail properly.

* adds a new CI build bot that runs the log unit test on CI.

Closes #1196 .
2018-07-09 21:40:42 -07:00
Qi Wang
cdf15b458a Rename huge_threshold to experimental, and tweak documentation. 2018-06-29 10:35:02 -07:00