Commit Graph

125 Commits

Author SHA1 Message Date
Jason Evans
881fbf762f Prefer old/low extent_t structures during reuse.
Rather than using a LIFO queue to track available extent_t structures,
use a red-black tree, and always choose the oldest/lowest available
during reuse.
2017-04-17 14:47:45 -07:00
Qi Wang
bbc16a50f9 Added documentation for mutex profiling related mallctls. 2017-03-23 00:03:28 -07:00
Qi Wang
bd2006a41b Added JSON output for lock stats.
Also added option 'x' to malloc_stats() to bypass lock section.
2017-03-23 00:03:28 -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
Qi Wang
f84471edc3 Add documentation for percpu_arena in jemalloc.xml.in. 2017-03-08 23:19:01 -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
Jason Evans
dc2125cf95 Replace the arenas.initialized mallctl with arena.<i>.initialized . 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
3dc4e83ccb Add MALLCTL_ARENAS_ALL.
Add the MALLCTL_ARENAS_ALL cpp macro as a fixed index for use
in accessing the arena.<i>.{purge,decay,dss} and stats.arenas.<i>.*
mallctls, and deprecate access via the arenas.narenas index (to be
removed in 6.0.0).
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
Jason Evans
8a4528bdd1 Uniformly cast mallctl[bymib]() oldp/newp arguments to (void *).
This avoids warnings in some cases, and is otherwise generally good
hygiene.
2016-11-15 15:01:03 -08:00
Jason Evans
2a2d1b6e86 Use <quote>...</quote> rather than &ldquo;...&rdquo; or "..." in XML. 2016-11-01 13:25:42 -07:00
Jason Evans
0ba5b9b618 Add "J" (JSON) support to malloc_stats_print().
This resolves #474.
2016-10-31 22:30:49 -07:00
Jason Evans
9acd5cf178 Remove all vestiges of chunks.
Remove mallctls:
- opt.lg_chunk
- stats.cactive

This resolves #464.
2016-10-12 11:55:43 -07:00
Jason Evans
63b5657aa5 Remove ratio-based purging.
Make decay-based purging the default (and only) mode.

Remove associated mallctls:
- opt.purge
- opt.lg_dirty_mult
- arena.<i>.lg_dirty_mult
- arenas.lg_dirty_mult
- stats.arenas.<i>.lg_dirty_mult

This resolves #385.
2016-10-12 10:40:27 -07:00
Jason Evans
d4ce47e7fb Change html manual encoding to UTF-8.
This works around GitHub's broken automatic reformatting from ISO-8859-1
to UTF-8 when serving static html.

Remove <parameter/> from e.g. <function>malloc<parameter/></function>,
add a custom template that does not append parentheses, and manually
specify them, e.g. <function>malloc()</function>.  This works around
apparently broken XSL formatting that causes <code/> to be emitted in
html (rather than <code></code>, or better yet, nothing).
2016-09-12 16:31:21 -07:00
Jason Evans
c716c1e531 Update project URL. 2016-09-12 11:56:24 -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
c8c3cbdf47 Miscellaneous s/chunk/extent/ updates. 2016-06-05 20:42:24 -07:00
Jason Evans
751f2c332d Remove obsolete stats.arenas.<i>.metadata.mapped mallctl.
Rename stats.arenas.<i>.metadata.allocated mallctl to
stats.arenas.<i>.metadata .
2016-06-05 20:42:24 -07:00
Jason Evans
127026ad98 Rename chunk_*_t hooks to extent_*_t. 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
498856f44a Move slabs out of chunks. 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
f4a58847d3 Remove obsolete reference to Valgrind and quarantine. 2016-06-03 12:20:02 -07:00
Jason Evans
17c021c177 Remove redzone support.
This resolves #369.
2016-05-13 10:27:33 -07:00
Jason Evans
ba5c709517 Remove quarantine support. 2016-05-13 10:25:05 -07:00
Jason Evans
9a8add1510 Remove Valgrind support. 2016-05-13 09:56:18 -07:00
Jason Evans
04c3c0f9a0 Add the stats.retained and stats.arenas.<i>.retained statistics.
This resolves #367.
2016-05-03 22:11:35 -07:00
Jason Evans
19ff2cefba Implement the arena.<i>.reset mallctl.
This makes it possible to discard all of an arena's allocations in a
single operation.

This resolves #146.
2016-04-22 15:20:06 -07:00
hitstergtd
eb68842daf Doc typo fixes. 2016-04-18 15:47:45 -07:00
Jason Evans
b582d2ad94 Update implementation details docs re: PTRDIFF_MAX.
Document that the maximum size class is limited by PTRDIFF_MAX, rather
than the full address space.  This reflects changes that were part of
0c516a00c4 (Make *allocx() size class
overflow behavior defined.).
2016-03-31 12:31:10 -07:00
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
5ec703dd33 Document the heap profile format.
This resolves #258.
2016-02-24 15:35:24 -08:00
Jason Evans
f591d2611a Update manual to reflect removal of global huge object tree.
This resolves #323.
2016-02-24 14:38:54 -08:00
Jason Evans
8f683b94a7 Make opt_narenas unsigned rather than size_t. 2016-02-24 13:03:48 -08:00
Jason Evans
243f7a0508 Implement decay-based unused dirty page purging.
This is an alternative to the existing ratio-based unused dirty page
purging, and is intended to eventually become the sole purging
mechanism.

Add mallctls:
- opt.purge
- opt.decay_time
- arena.<i>.decay
- arena.<i>.decay_time
- arenas.decay_time
- stats.arenas.<i>.decay_time

This resolves #325.
2016-02-19 20:56:21 -08:00
Jason Evans
f829009929 Add --with-malloc-conf.
Add --with-malloc-conf, which makes it possible to embed a default
options string during configuration.
2016-02-19 20:29:06 -08:00
Jason Evans
109712b681 Fix a documentation editing error. 2016-02-19 17:02:25 -08:00
Jason Evans
ea7449ffad Fix a manual editing error. 2015-10-19 16:56:05 -04:00
Jason Evans
92e96e3bfc Improve arena.<i>.chunk_hooks documentation formatting. 2015-08-14 13:46:08 -07:00
Jason Evans
38f864947b Update in-place reallocation documentation. 2015-08-14 00:55:44 -07:00
Jason Evans
a5dbaef08f Update large/huge size class cutoff documentation. 2015-08-14 00:35:11 -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
Jason Evans
b49a334a64 Generalize chunk management hooks.
Add the "arena.<i>.chunk_hooks" mallctl, which replaces and expands on
the "arena.<i>.chunk.{alloc,dalloc,purge}" mallctls.  The chunk hooks
allow control over chunk allocation/deallocation, decommit/commit,
purging, and splitting/merging, such that the application can rely on
jemalloc's internal chunk caching and retaining functionality, yet
implement a variety of chunk management mechanisms and policies.

Merge the chunks_[sz]ad_{mmap,dss} red-black trees into
chunks_[sz]ad_retained.  This slightly reduces how hard jemalloc tries
to honor the dss precedence setting; prior to this change the precedence
setting was also consulted when recycling chunks.

Fix chunk purging.  Don't purge chunks in arena_purge_stashed(); instead
deallocate them in arena_unstash_purged(), so that the dirty memory
linkage remains valid until after the last time it is used.

This resolves #176 and #201.
2015-08-03 21:49:02 -07:00
Jason Evans
f2bc85298c Add the config.cache_oblivious mallctl. 2015-07-17 16:38:25 -07:00
Jason Evans
5bd879646c Change default chunk size from 256 KiB to 2 MiB.
This change improves interaction with transparent huge pages, e.g.
reduced page faults (at least in the absence of unused dirty page
purging).
2015-07-15 17:15:26 -07:00
Jason Evans
56048baeb4 Clarify relationship between stats.resident and stats.mapped. 2015-05-29 19:21:10 -07:00