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                        <h1><a class="header" href="#perf1" id="perf1">perf(1)</a></h1>
<pre><code class="language-markdown">perf list      show supported hw/sw events

perf stat
  -p &lt;pid&gt; .. show stats for running process
  -I &lt;ms&gt; ... show stats periodically over interval &lt;ms&gt;
  -e &lt;ev&gt; ... filter for events

perf top
  -p &lt;pid&gt; .. show stats for running process
  -F &lt;hz&gt; ... sampling frequency
  -K ........ hide kernel threads

perf record
  -p &lt;pid&gt; ............... record stats for running process
  -F &lt;hz&gt; ................ sampling frequency
  --call-graph &lt;method&gt; .. [fp, dwarf, lbr] method how to caputre backtrace
                           fp   : use frame-pointer, need to compile with
                                  -fno-omit-frame-pointer
                           dwarf: use .cfi debug information
                           lbr  : use hardware last branch record facility
  -g ..................... short-hand for --call-graph fp
  -e &lt;ev&gt; ................ filter for events

perf report
  -n .................... annotate symbols with nr of samples
  --stdio ............... report to stdio, if not presen tui mode
  -g graph,0.5,caller ... show caller based call chains with value &gt;0.5
</code></pre>
<pre><code class="language-markdown">Useful &lt;ev&gt;:
  page-faults
  minor-faults
  major-faults
  cpu-cycles`
  task-clock
</code></pre>
<h2><a class="header" href="#a-hrefhttpsgithubcombrendangreggflamegraphflamegrapha" id="a-hrefhttpsgithubcombrendangreggflamegraphflamegrapha"><a href="https://github.com/brendangregg/FlameGraph"><code>Flamegraph</code></a></a></h2>
<h3><a class="header" href="#flamegraph-with-single-event-trace" id="flamegraph-with-single-event-trace">Flamegraph with single event trace</a></h3>
<pre><code class="language-markdown">perf record -g -e cpu-cycles -p &lt;pid&gt;
perf script | FlameGraph/stackcollapse-perf.pl | FlameGraph/flamegraph.pl &gt; cycles-flamegraph.svg
</code></pre>
<h3><a class="header" href="#flamegraph-with-multiple-event-traces" id="flamegraph-with-multiple-event-traces">Flamegraph with multiple event traces</a></h3>
<pre><code class="language-markdown">perf record -g -e cpu-cycles,page-faults -p &lt;pid&gt;
perf script --per-event-dump
# fold &amp; generate as above
</code></pre>

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