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Remove tcache bin sorting during flush.

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This feature caused significant performance degradation, and the
fragmentation reduction benefits were difficult to quantify.
This commit is contained in:
Jason Evans
2010-01-29 13:37:31 -08:00
parent c66aaf1476
commit d8f565f239
6 changed files with 0 additions and 98 deletions
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16
jemalloc/doc/jemalloc.3.in
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@@ -414,15 +414,6 @@ Double/halve the size of the maximum size class that is a multiple of the
quantum (8 or 16 bytes, depending on architecture).
Above this size, cacheline spacing is used for size classes.
The default value is 128 bytes.
@roff_tcache@.It S
@roff_tcache@Sort the objects of a particular size class that are stored in a
@roff_tcache@thread-specific cache just before flushing some of them from the
@roff_tcache@cache, such that the objects highest in memory are preferentially
@roff_tcache@freed.
@roff_tcache@This tends to reduce fragmentation, but sorting is (n lg n), and in
@roff_tcache@practice it is expensive enough to have a moderate performance
@roff_tcache@impact.
@roff_tcache@This option is enabled by default.
@roff_trace@.It T
@roff_trace@Write a verbose trace log to a set of files named according to the
@roff_trace@pattern
@@ -722,13 +713,6 @@ option.
@roff_tcache@option.
@roff_tcache@.Ed
.\"-----------------------------------------------------------------------------
@roff_tcache@.It Sy "opt.tcache_sort (bool) r-"
@roff_tcache@.Bd -ragged -offset indent -compact
@roff_tcache@See the
@roff_tcache@.Dq S
@roff_tcache@option.
@roff_tcache@.Ed
.\"-----------------------------------------------------------------------------
.It Sy "opt.stats_print (bool) r-"
.Bd -ragged -offset indent -compact
See the