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Remove the opt.lg_prof_bt_max option.

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Remove opt.lg_prof_bt_max, and hard code it to 7.  The original
intention of this option was to enable faster backtracing by limiting
backtrace depth.  However, this makes graphical pprof output very
difficult to interpret.  In practice, decreasing sampling frequency is a
better mechanism for limiting profiling overhead.
This commit is contained in:
Jason Evans 2012-02-13 18:23:41 -08:00
parent 0b526ff94d
commit 5389146191
6 changed files with 18 additions and 61 deletions
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16
doc/jemalloc.xml.in
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@ -930,8 +930,6 @@ malloc_conf = "xmalloc:true";]]></programlisting>
where <literal>&lt;prefix&gt;</literal> is controlled by the <link
linkend="opt.prof_prefix"><mallctl>opt.prof_prefix</mallctl></link>
option. See the <link
linkend="opt.lg_prof_bt_max"><mallctl>opt.lg_prof_bt_max</mallctl></link>
option for backtrace depth control. See the <link
linkend="opt.prof_active"><mallctl>opt.prof_active</mallctl></link>
option for on-the-fly activation/deactivation. See the <link
linkend="opt.lg_prof_sample"><mallctl>opt.lg_prof_sample</mallctl></link>
@ -962,17 +960,6 @@ malloc_conf = "xmalloc:true";]]></programlisting>
<filename>jeprof</filename>.</para></listitem>
</varlistentry>
<varlistentry id="opt.lg_prof_bt_max">
<term>
<mallctl>opt.lg_prof_bt_max</mallctl>
(<type>size_t</type>)
<literal>r-</literal>
[<option>--enable-prof</option>]
</term>
<listitem><para>Maximum backtrace depth (log base 2) when profiling
memory allocation activity. The default is 128 (2^7).</para></listitem>
</varlistentry>
<varlistentry id="opt.prof_active">
<term>
<mallctl>opt.prof_active</mallctl>
@ -1067,9 +1054,6 @@ malloc_conf = "xmalloc:true";]]></programlisting>
<citerefentry><refentrytitle>atexit</refentrytitle>
<manvolnum>3</manvolnum></citerefentry> function to report memory leaks
detected by allocation sampling. See the
<link
linkend="opt.lg_prof_bt_max"><mallctl>opt.lg_prof_bt_max</mallctl></link>
option for backtrace depth control. See the
<link linkend="opt.prof"><mallctl>opt.prof</mallctl></link> option for
information on analyzing heap profile output. This option is disabled
by default.</para></listitem>