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Dmitry Ilvokhin 3820e38dc1 Remove validation for HPA ratios 
Config validation was introduced at 3aae792b with main intention to fix
infinite purging loop, but it didn't actually fix the underlying
problem, just masked it. Later 47d69b4ea was merged to address the same
problem.

Options `hpa_dirty_mult` and `hpa_hugification_threshold` have different
application dimensions: `hpa_dirty_mult` applied to active memory on the
shard, but `hpa_hugification_threshold` is a threshold for single
pageslab (hugepage). It doesn't make much sense to sum them up together.

While it is true that too high value of `hpa_dirty_mult` and too low
value of `hpa_hugification_threshold` can lead to pathological
behaviour, it is true for other options as well. Poor configurations
might lead to suboptimal and sometimes completely unacceptable
behaviour and that's OK, that is exactly the reason why they are called
poor.

There are other mechanism exist to prevent extreme behaviour, when we
hugified and then immediately purged page, see
`hpa_hugify_blocked_by_ndirty` function, which exist to prevent exactly
this case.

Lastly, `hpa_dirty_mult + hpa_hugification_threshold >= 1` constraint is
too tight and prevents a lot of valid configurations.
2024-11-20 18:59:07 -08:00
.github/workflows Update acitons/checkout and actions/upload-artifact to v4 2024-03-12 12:59:15 -07:00
bin Updated jeprof with more symbols to filter. 2024-10-14 10:31:58 -07:00
build-aux Remove trailing whitespace 2023-06-23 11:58:18 -07:00
doc Update doc to reflect muzzy decay is disabled by default. 2024-10-10 16:41:23 -07:00
doc_internal update PROFILING_INTERNALS.md 2022-10-03 10:48:29 -07:00
include Add opt hpa_hugify_sync to hugify synchronously 2024-11-20 10:52:52 -08:00
m4 Support C++17 over-aligned allocation 2019-11-22 10:14:16 -08:00
msvc Add batcher module. 2024-05-22 10:30:31 -07:00
scripts Add travis tests for arm64. 2024-09-12 15:40:04 -07:00
src Remove validation for HPA ratios 2024-11-20 18:59:07 -08:00
test Remove validation for HPA ratios 2024-11-20 18:59:07 -08:00
.appveyor.yml Appveyor: fix 404 errors. 2020-10-27 15:28:20 -07:00
.autom4te.cfg Disable autom4te cache. 2014-09-02 17:49:29 -07:00
.cirrus.yml Limit Cirrus CI to freebsd 15 and 14 2024-08-28 16:33:36 -07:00
.clang-format Add a .clang-format file. 2020-10-02 14:49:56 -07:00
.gitattributes fix git handling of newlines on windows 2014-05-07 18:48:39 -04:00
.gitignore gitignore: Start ignoring clangd dirs. 2024-01-23 17:02:01 -08:00
.travis.yml Add travis tests for arm64. 2024-09-12 15:40:04 -07:00
autogen.sh build: Make autogen.sh accept quoted extra options 2024-01-03 14:20:34 -08:00
ChangeLog Update ChangeLog for 5.3.0. 2022-05-06 11:24:21 -07:00
config.stamp.in Move repo contents in jemalloc/ to top level. 2011-03-31 20:36:17 -07:00
configure.ac Add opt hpa_hugify_sync to hugify synchronously 2024-11-20 10:52:52 -08:00
COPYING Update copyright dates. 2019-01-25 13:25:20 -08:00
INSTALL.md Update the configure cache file example in INSTALL.md 2024-10-10 16:41:48 -07:00
jemalloc.pc.in Expose jemalloc_prefix via pkg-config 2023-09-05 14:30:21 -07:00
Makefile.in Remove validation for HPA ratios 2024-11-20 18:59:07 -08:00
README switch to https 2023-03-09 11:44:02 -08:00
run_tests.sh Introduce scripts to run all possible tests 2017-01-30 17:51:57 -08:00
TUNING.md switch to https 2023-03-09 11:44:02 -08:00

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: https://jemalloc.net/