diff options
Diffstat (limited to 'perf.html')
| -rw-r--r-- | perf.html | 21 |
1 files changed, 10 insertions, 11 deletions
@@ -81,7 +81,7 @@ <nav id="sidebar" class="sidebar" aria-label="Table of contents"> <div id="sidebar-scrollbox" class="sidebar-scrollbox"> - <ol class="chapter"><li class="expanded "><a href="ld.so.html"><strong aria-hidden="true">1.</strong> ld.so</a></li><li class="expanded "><a href="git.html"><strong aria-hidden="true">2.</strong> git</a></li><li class="expanded "><a href="gdb.html"><strong aria-hidden="true">3.</strong> gdb</a></li><li class="expanded "><a href="radare2.html"><strong aria-hidden="true">4.</strong> radare2</a></li><li class="expanded "><a href="emacs.html"><strong aria-hidden="true">5.</strong> emacs</a></li><li class="expanded "><a href="fish.html"><strong aria-hidden="true">6.</strong> fish</a></li><li class="expanded "><a href="strace.html"><strong aria-hidden="true">7.</strong> strace</a></li><li class="expanded "><a href="lsof.html"><strong aria-hidden="true">8.</strong> lsof</a></li><li class="expanded "><a href="pidstat.html"><strong aria-hidden="true">9.</strong> pidstat</a></li><li class="expanded "><a href="time.html"><strong aria-hidden="true">10.</strong> time</a></li><li class="expanded "><a href="pmap.html"><strong aria-hidden="true">11.</strong> pmap</a></li><li class="expanded "><a href="pstack.html"><strong aria-hidden="true">12.</strong> pstack</a></li><li class="expanded "><a href="perf.html" class="active"><strong aria-hidden="true">13.</strong> perf</a></li><li class="expanded "><a href="oprofile.html"><strong aria-hidden="true">14.</strong> OProfile</a></li><li class="expanded "><a href="od.html"><strong aria-hidden="true">15.</strong> od</a></li><li class="expanded "><a href="xxd.html"><strong aria-hidden="true">16.</strong> xxd</a></li><li class="expanded "><a href="readelf.html"><strong aria-hidden="true">17.</strong> readelf</a></li><li class="expanded "><a href="objdump.html"><strong aria-hidden="true">18.</strong> objdump</a></li><li class="expanded "><a href="nm.html"><strong aria-hidden="true">19.</strong> nm</a></li><li class="expanded "><a href="c++filt.html"><strong aria-hidden="true">20.</strong> c++filt</a></li></ol> + <ol class="chapter"><li class="expanded "><a href="ld.so.html"><strong aria-hidden="true">1.</strong> ld.so</a></li><li class="expanded "><a href="git.html"><strong aria-hidden="true">2.</strong> git</a></li><li class="expanded "><a href="awk.html"><strong aria-hidden="true">3.</strong> awk</a></li><li class="expanded "><a href="gdb.html"><strong aria-hidden="true">4.</strong> gdb</a></li><li class="expanded "><a href="radare2.html"><strong aria-hidden="true">5.</strong> radare2</a></li><li class="expanded "><a href="emacs.html"><strong aria-hidden="true">6.</strong> emacs</a></li><li class="expanded "><a href="fish.html"><strong aria-hidden="true">7.</strong> fish</a></li><li class="expanded "><a href="strace.html"><strong aria-hidden="true">8.</strong> strace</a></li><li class="expanded "><a href="lsof.html"><strong aria-hidden="true">9.</strong> lsof</a></li><li class="expanded "><a href="pidstat.html"><strong aria-hidden="true">10.</strong> pidstat</a></li><li class="expanded "><a href="time.html"><strong aria-hidden="true">11.</strong> time</a></li><li class="expanded "><a href="pgrep.html"><strong aria-hidden="true">12.</strong> pgrep</a></li><li class="expanded "><a href="pstack.html"><strong aria-hidden="true">13.</strong> pstack</a></li><li class="expanded "><a href="pstack.html"><strong aria-hidden="true">14.</strong> pstack</a></li><li class="expanded "><a href="perf.html" class="active"><strong aria-hidden="true">15.</strong> perf</a></li><li class="expanded "><a href="oprofile.html"><strong aria-hidden="true">16.</strong> OProfile</a></li><li class="expanded "><a href="od.html"><strong aria-hidden="true">17.</strong> od</a></li><li class="expanded "><a href="xxd.html"><strong aria-hidden="true">18.</strong> xxd</a></li><li class="expanded "><a href="readelf.html"><strong aria-hidden="true">19.</strong> readelf</a></li><li class="expanded "><a href="objdump.html"><strong aria-hidden="true">20.</strong> objdump</a></li><li class="expanded "><a href="nm.html"><strong aria-hidden="true">21.</strong> nm</a></li><li class="expanded "><a href="c++filt.html"><strong aria-hidden="true">22.</strong> c++filt</a></li></ol> </div> <div id="sidebar-resize-handle" class="sidebar-resize-handle"></div> </nav> @@ -149,8 +149,7 @@ <div id="content" class="content"> <main> <h1><a class="header" href="#perf1" id="perf1">perf(1)</a></h1> -<pre><code class="language-markdown">perf list - ......... show supported hw/sw events +<pre><code class="language-markdown">perf list show supported hw/sw events perf stat -p <pid> .. show stats for running process @@ -166,7 +165,8 @@ perf record -p <pid> ............... record stats for running process -F <hz> ................ sampling frequency --call-graph <method> .. [fp, dwarf, lbr] method how to caputre backtrace - fp : use frame-pointer, need -fno-omit-frame-pointer + 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 @@ -177,8 +177,7 @@ perf report --stdio ............... report to stdio, if not presen tui mode -g graph,0.5,caller ... show caller based call chains with value >0.5 </code></pre> -<h2><a class="header" href="#useful-perf-events" id="useful-perf-events">Useful <code>perf</code> events</a></h2> -<pre><code class="language-markdown">useful <ev>: +<pre><code class="language-markdown">Useful <ev>: page-faults minor-faults major-faults @@ -186,12 +185,12 @@ perf report 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> -<pre><code class="language-markdown"># flamegraph for single event trace -perf record -g -p <pid> -e cpu-cycles +<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 <pid> perf script | FlameGraph/stackcollapse-perf.pl | FlameGraph/flamegraph.pl > cycles-flamegraph.svg - -# flamegraphs for multiple events trace -perf record -g -p <pid> -e cpu-cycles,page-faults +</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 <pid> perf script --per-event-dump # fold & generate as above </code></pre> |