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Implement opt.stats_interval and the _opts options.

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Add options stats_interval and stats_interval_opts to allow interval based stats
printing.  This provides an easy way to collect stats without code changes,
because opt.stats_print may not work (some binaries never exit).
This commit is contained in:
Qi Wang
2020-01-13 22:29:17 -08:00
committed by Qi Wang
parent d71a145ec1
commit 88b0e03a4e
14 changed files with 334 additions and 50 deletions
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35
doc/jemalloc.xml.in
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@@ -1185,6 +1185,41 @@ mallctl("arena." STRINGIFY(MALLCTL_ARENAS_ALL) ".decay",
enabled. The default is <quote></quote>.</para></listitem>
</varlistentry>
<varlistentry id="opt.stats_interval">
<term>
<mallctl>opt.stats_interval</mallctl>
(<type>int64_t</type>)
<literal>r-</literal>
</term>
<listitem><para>Average interval between statistics outputs, as measured
in bytes of allocation activity. The actual interval may be sporadic
because decentralized event counters are used to avoid synchronization
bottlenecks. The output may be triggered on any thread, which then
calls <function>malloc_stats_print()</function>. <link
linkend="opt.stats_interval_opts"><mallctl>opt.stats_interval_opts</mallctl></link>
can be combined to specify output options. By default,
interval-triggered stats output is disabled (encoded as
-1).</para></listitem>
</varlistentry>
<varlistentry id="opt.stats_interval_opts">
<term>
<mallctl>opt.stats_interval_opts</mallctl>
(<type>const char *</type>)
<literal>r-</literal>
</term>
<listitem><para>Options (the <parameter>opts</parameter> string) to pass
to the <function>malloc_stats_print()</function> for interval based
statistics printing (enabled
through <link
linkend="opt.stats_interval"><mallctl>opt.stats_interval</mallctl></link>). See
available options in <link
linkend="malloc_stats_print_opts"><function>malloc_stats_print()</function></link>.
Has no effect unless <link
linkend="opt.stats_interval"><mallctl>opt.stats_interval</mallctl></link> is
enabled. The default is <quote></quote>.</para></listitem>
</varlistentry>
<varlistentry id="opt.junk">
<term>
<mallctl>opt.junk</mallctl>