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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2019-05-17 18:16:20 +0100 |
|---|---|---|
| committer | Arjun Shankar <ashankar@redhat.com> | 2019-10-30 12:01:42 +0100 |
| commit | f88c59f4657ac2e0bab8f51f60022ecbe7f12e2e (patch) | |
| tree | 72d11950c9a3d2fa02f0db6f666265f120115c79 /manual | |
| parent | 3640758943c856268bc12a3307838c2a65d2f9ea (diff) | |
| download | glibc-f88c59f4657ac2e0bab8f51f60022ecbe7f12e2e.tar.gz glibc-f88c59f4657ac2e0bab8f51f60022ecbe7f12e2e.tar.xz glibc-f88c59f4657ac2e0bab8f51f60022ecbe7f12e2e.zip | |
Small tcache improvements
Change the tcache->counts[] entries to uint16_t - this removes the limit set by char and allows a larger tcache. Remove a few redundant asserts. bench-malloc-thread with 4 threads is ~15% faster on Cortex-A72. Reviewed-by: DJ Delorie <dj@redhat.com> * malloc/malloc.c (MAX_TCACHE_COUNT): Increase to UINT16_MAX. (tcache_put): Remove redundant assert. (tcache_get): Remove redundant asserts. (__libc_malloc): Check tcache count is not zero. * manual/tunables.texi (glibc.malloc.tcache_count): Update maximum. (cherry picked from commit 1f50f2ad854c84ead522bfc7331b46dbe6057d53)
Diffstat (limited to 'manual')
| -rw-r--r-- | manual/tunables.texi | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/manual/tunables.texi b/manual/tunables.texi index d8c22dd29f..74ae253ebf 100644 --- a/manual/tunables.texi +++ b/manual/tunables.texi @@ -188,7 +188,7 @@ per-thread cache. The default (and maximum) value is 1032 bytes on @deftp Tunable glibc.malloc.tcache_count The maximum number of chunks of each size to cache. The default is 7. -The upper limit is 127. If set to zero, the per-thread cache is effectively +The upper limit is 65535. If set to zero, the per-thread cache is effectively disabled. The approximate maximum overhead of the per-thread cache is thus equal |