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Jason Evans 8d0e04d42f Refactor rtree to be lock-free. 
Recent huge allocation refactoring associates huge allocations with
arenas, but it remains necessary to quickly look up huge allocation
metadata during reallocation/deallocation.  A global radix tree remains
a good solution to this problem, but locking would have become the
primary bottleneck after (upcoming) migration of chunk management from
global to per arena data structures.

This lock-free implementation uses double-checked reads to traverse the
tree, so that in the steady state, each read or write requires only a
single atomic operation.

This implementation also assures that no more than two tree levels
actually exist, through a combination of careful virtual memory
allocation which makes large sparse nodes cheap, and skipping the root
node on x64 (possible because the top 16 bits are all 0 in practice).
2015-02-04 16:51:53 -08:00
bin Implement the jemalloc-config script. 2015-01-22 17:55:58 -08:00
doc Implement the prof.gdump mallctl. 2015-01-25 21:21:35 -08:00
include Refactor rtree to be lock-free. 2015-02-04 16:51:53 -08:00
src Refactor rtree to be lock-free. 2015-02-04 16:51:53 -08:00
test Refactor rtree to be lock-free. 2015-02-04 16:51:53 -08:00
.autom4te.cfg Disable autom4te cache. 2014-09-02 17:49:29 -07:00
.gitattributes fix git handling of newlines on windows 2014-05-07 18:48:39 -04:00
.gitignore Implement the jemalloc-config script. 2015-01-22 17:55:58 -08:00
autogen.sh Move repo contents in jemalloc/ to top level. 2011-03-31 20:36:17 -07:00
ChangeLog Update ChangeLog for 3.6.0. 2014-03-31 09:23:10 -07:00
config.guess Update config.{guess,sub} to more recent versions, to add better support to OpenRISC/or1k (among others) 2014-07-29 23:15:26 +01:00
config.stamp.in Move repo contents in jemalloc/ to top level. 2011-03-31 20:36:17 -07:00
config.sub Fixed iOS build after OR1 changes 2014-09-12 07:24:28 +03:00
configure.ac Fix shell test to use = instead of ==. 2015-02-04 16:50:04 -08:00
COPYING Update copyright dates for 2015. 2015-01-22 16:03:00 -08:00
coverage.sh Add test code coverage analysis. 2013-12-06 18:50:51 -08:00
INSTALL Fix line wrapping. 2014-10-14 22:31:49 -07:00
install-sh Move repo contents in jemalloc/ to top level. 2011-03-31 20:36:17 -07:00
jemalloc.pc.in Generate a pkg-config file 2014-09-19 22:27:35 +01:00
Makefile.in Implement the jemalloc-config script. 2015-01-22 17:55:58 -08:00
README Update README. 2013-10-20 19:38:19 -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, Valgrind integration, 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://www.canonware.com/jemalloc/