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Add support for namespace pids in heap profile names

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This change adds support for writing pid namespaces to the filename of a
heap profile. When running with namespaces pids may reused across
namespaces and if mounts are shared where profiles are written there is
not a great way to differentiate profiles between pids.

Signed-off-by: Daniel Hodges <hodges.daniel.scott@gmail.com>
Signed-off-by: Daniel Hodges <hodgesd@fb.com>
This commit is contained in:
Daniel Hodges 2023-12-23 19:40:44 -05:00 • committed by Qi Wang
parent 83b075789b
commit 11038ff762
7 changed files with 93 additions and 10 deletions
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17
doc/jemalloc.xml.in
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@ -1514,6 +1514,23 @@ malloc_conf = "xmalloc:true";]]></programlisting>
by default.</para></listitem>
</varlistentry>
<varlistentry id="opt.prof_pid_namespace">
<term>
<mallctl>opt.prof_pid_namespace</mallctl>
(<type>bool</type>)
<literal>r-</literal>
[<option>--enable-prof</option>]
</term>
<listitem><para>Enable adding the pid namespace to the profile
filename. Profiles are dumped to files named according to the pattern
<filename>&lt;prefix&gt;.&lt;pid_namespace&gt;.&lt;pid&gt;.&lt;seq&gt;.i&lt;iseq&gt;.heap</filename>,
where <literal>&lt;prefix&gt;</literal> is controlled by the <link
linkend="opt.prof_prefix"><mallctl>opt.prof_prefix</mallctl></link> and
<link linkend="prof.prefix"><mallctl>prof.prefix</mallctl></link>
options.
</para></listitem>
</varlistentry>
<varlistentry id="opt.lg_prof_interval">
<term>
<mallctl>opt.lg_prof_interval</mallctl>