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Prefer old/low extent_t structures during reuse.

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Rather than using a LIFO queue to track available extent_t structures,
use a red-black tree, and always choose the oldest/lowest available
during reuse.
This commit is contained in:
Jason Evans
2017-04-16 22:31:16 -07:00
parent 76b35f4b2f
commit 881fbf762f
10 changed files with 80 additions and 37 deletions
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8
doc/jemalloc.xml.in
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@@ -2691,14 +2691,14 @@ struct extent_hooks_s {
counters</link>.</para></listitem>
</varlistentry>
<varlistentry id="stats.arenas.i.mutexes.extent_freelist">
<varlistentry id="stats.arenas.i.mutexes.extent_avail">
<term>
<mallctl>stats.arenas.&lt;i&gt;.mutexes.extent_freelist.{counter}</mallctl>
<mallctl>stats.arenas.&lt;i&gt;.mutexes.extent_avail.{counter}</mallctl>
(<type>counter specific type</type>) <literal>r-</literal>
[<option>--enable-stats</option>]
</term>
<listitem><para>Statistics on <varname>arena.&lt;i&gt;.extent_freelist
</varname> mutex (arena scope; extent freelist related).
<listitem><para>Statistics on <varname>arena.&lt;i&gt;.extent_avail
</varname> mutex (arena scope; extent avail related).
<mallctl>{counter}</mallctl> is one of the counters in <link
linkend="mutex_counters">mutex profiling
counters</link>.</para></listitem>