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Yinan Zhang 9e031c1d11 Bug fix for prof_active switch 
The bug is subtle but critical: if application performs the following
three actions in sequence: (a) turn `prof_active` off, (b) make at
least one allocation that triggers the malloc slow path via the
`if (unlikely(bytes_until_sample < 0))` path, and (c) turn
`prof_active` back on, then the application would never get another
sample (until a very very long time later).

The fix is to properly reset `bytes_until_sample` rather than
throwing it all the way to `SSIZE_MAX`.

A side minor change is to call `prof_active_get_unlocked()` rather
than directly grabbing the `prof_active` variable - it is the very
reason why we defined the `prof_active_get_unlocked()` function.
2019-08-22 13:00:10 -07:00
bin Fix typo derived from tcmalloc's pprof 2019-04-23 15:29:57 -07:00
build-aux Update config.{guess,sub} from upstream. 2016-11-10 15:08:32 -08:00
doc Report stats for tdatas_mtx and prof_dump_mtx 2019-08-09 09:24:16 -07:00
include Track low_water == -1 case explicitly. 2019-08-21 16:00:38 -07:00
m4 jemalloc cpp new/delete bindings 2016-12-12 18:36:06 -08:00
msvc Refactor profiling 2019-08-07 19:48:28 -07:00
scripts Safety checks: Run tests by default 2019-04-15 16:48:12 -07:00
src Bug fix for prof_active switch 2019-08-22 13:00:10 -07:00
test Track low_water == -1 case explicitly. 2019-08-21 16:00:38 -07:00
.appveyor.yml Reorder the configs for AppVeyor. 2019-07-14 23:06:24 -07:00
.autom4te.cfg Disable autom4te cache. 2014-09-02 17:49:29 -07:00
.cirrus.yml Revert "Customize cloning to include tags so that VERSION is valid." 2019-01-14 10:35:48 -08:00
.gitattributes fix git handling of newlines on windows 2014-05-07 18:48:39 -04:00
.gitignore Kill size_classes.sh. 2018-07-12 20:53:06 -07:00
.travis.yml Safety checks: Run tests by default 2019-04-15 16:48:12 -07:00
autogen.sh Move repo contents in jemalloc/ to top level. 2011-03-31 20:36:17 -07:00
ChangeLog Update Changelog for 5.2.1. 2019-08-05 12:52:43 -07:00
config.stamp.in Move repo contents in jemalloc/ to top level. 2011-03-31 20:36:17 -07:00
configure.ac Add hint in the bogus version string. 2019-08-16 16:08:18 -07:00
COPYING Update copyright dates. 2019-01-25 13:25:20 -08:00
INSTALL.md Update INSTALL.md about the default doc build. 2019-08-16 10:03:34 -07:00
jemalloc.pc.in Reformat the version number in jemalloc.pc.in. 2018-05-07 20:12:03 -07:00
Makefile.in Redesign the cache bin metadata for fast path. 2019-08-19 12:21:44 -07:00
README Update project URL. 2016-09-12 11:56:24 -07:00
run_tests.sh Introduce scripts to run all possible tests 2017-01-30 17:51:57 -08:00
TUNING.md Add TUNING.md. 2018-05-03 12:52:52 -07:00

README 

jemalloc is a general purpose malloc(3) implementation that emphasizes
fragmentation avoidance and scalable concurrency support.  jemalloc first came
into use as the FreeBSD libc allocator in 2005, and since then it has found its
way into numerous applications that rely on its predictable behavior.  In 2010
jemalloc development efforts broadened to include developer support features
such as heap profiling and extensive monitoring/tuning hooks.  Modern jemalloc
releases continue to be integrated back into FreeBSD, and therefore versatility
remains critical.  Ongoing development efforts trend toward making jemalloc
among the best allocators for a broad range of demanding applications, and
eliminating/mitigating weaknesses that have practical repercussions for real
world applications.

The COPYING file contains copyright and licensing information.

The INSTALL file contains information on how to configure, build, and install
jemalloc.

The ChangeLog file contains a brief summary of changes for each release.

URL: http://jemalloc.net/