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Implement the arena.<i>.reset mallctl.

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This makes it possible to discard all of an arena's allocations in a
single operation.

This resolves #146.
This commit is contained in:
Jason Evans 2016-04-22 14:37:17 -07:00
parent 66cd953514
commit 19ff2cefba
8 changed files with 411 additions and 39 deletions
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17
doc/jemalloc.xml.in
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@ -1558,6 +1558,23 @@ malloc_conf = "xmalloc:true";]]></programlisting>
details.</para></listitem>
</varlistentry>
<varlistentry id="arena.i.reset">
<term>
<mallctl>arena.&lt;i&gt;.reset</mallctl>
(<type>void</type>)
<literal>--</literal>
</term>
<listitem><para>Discard all of the arena's extant allocations. This
interface can only be used with arenas created via <link
linkend="arenas.extend"><mallctl>arenas.extend</mallctl></link>. None
of the arena's discarded/cached allocations may accessed afterward. As
part of this requirement, all thread caches which were used to
allocate/deallocate in conjunction with the arena must be flushed
beforehand. This interface cannot be used if running inside Valgrind,
nor if the <link linkend="opt.quarantine">quarantine</link> size is
non-zero.</para></listitem>
</varlistentry>
<varlistentry id="arena.i.dss">
<term>
<mallctl>arena.&lt;i&gt;.dss</mallctl>