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| author | DJ Delorie <dj@delorie.com> | 2017-07-06 13:37:30 -0400 |
|---|---|---|
| committer | DJ Delorie <dj@delorie.com> | 2017-07-06 13:37:30 -0400 |
| commit | d5c3fafc4307c9b7a4c7d5cb381fcdbfad340bcc (patch) | |
| tree | 380cfbc329860434d6b29825bd02ba5f0c7d4b30 /NEWS | |
| parent | 3cefdd7310a5d1fad45648d9346e47df9c185fdc (diff) | |
| download | glibc-d5c3fafc4307c9b7a4c7d5cb381fcdbfad340bcc.zip glibc-d5c3fafc4307c9b7a4c7d5cb381fcdbfad340bcc.tar.gz glibc-d5c3fafc4307c9b7a4c7d5cb381fcdbfad340bcc.tar.bz2 | |
Add per-thread cache to malloc
* config.make.in: Enable experimental malloc option.
* configure.ac: Likewise.
* configure: Regenerate.
* manual/install.texi: Document it.
* INSTALL: Regenerate.
* malloc/Makefile: Likewise.
* malloc/malloc.c: Add per-thread cache (tcache).
(tcache_put): New.
(tcache_get): New.
(tcache_thread_freeres): New.
(tcache_init): New.
(__libc_malloc): Use cached chunks if available.
(__libc_free): Initialize tcache if needed.
(__libc_realloc): Likewise.
(__libc_calloc): Likewise.
(_int_malloc): Prefill tcache when appropriate.
(_int_free): Likewise.
(do_set_tcache_max): New.
(do_set_tcache_count): New.
(do_set_tcache_unsorted_limit): New.
* manual/probes.texi: Document new probes.
* malloc/arena.c: Add new tcache tunables.
* elf/dl-tunables.list: Likewise.
* manual/tunables.texi: Document them.
* NEWS: Mention the per-thread cache.
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -9,6 +9,14 @@ Version 2.26 Major new features: +* A per-thread cache has been added to malloc. Access to the cache requires + no locks and therefore significantly accelerates the fast path to allocate + and free small amounts of memory. Refilling an empty cache requires locking + the underlying arena. Performance measurements show significant gains in a + wide variety of user workloads. Workloads were captured using a special + instrumented malloc and analyzed with a malloc simulator. Contributed by + DJ Delorie with the help of Florian Weimer, and Carlos O'Donell. + * Unicode 10.0.0 Support: Character encoding, character type info, and transliteration tables are all updated to Unicode 10.0.0, using generator scripts contributed by Mike FABIAN (Red Hat). |