<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#ffffff">
Hi,<br>
<br>
I think this should suffice<br>
<a
href="https://perf.wiki.kernel.org/index.php/Tutorial#Live_analysis_with_perf_top">https://perf.wiki.kernel.org/index.php/Tutorial#Live_analysis_with_perf_top</a><br>
<br>
Rest of the information is archived here<br>
<a
href="http://lxr.linux.no/linux+v2.6.39/tools/perf/Documentation/">http://lxr.linux.no/linux+v2.6.39/tools/perf/Documentation/</a><br>
<br>
The value of 1000Hz means the frequency at which the system's timer
is programmed to interrupt the kernel. It is a kernel configurable
option.<br>
<br>
Thanks<br>
Vipin<br>
On 07/13/2011 10:59 AM, ankur dwivedi wrote:
<blockquote
cite="mid:CABW4kEdMKooSpG3uEXyS5n-eJu3LfniBXiPVpxzkpAm728czTA@mail.gmail.com"
type="cite">Hi,<br>
<br>
My question is regarding the basic use of perf top command in
linux.<br clear="all">
<br>
The following is the snap shot of running a "<b>perf top -e
cache-misses</b>" command from console: <br>
<br>
----------------------------------------------------------------------------------------------------------------------------------------------------------------------<br>
PerfTop: 76<b> irqs/sec</b> kernel:14.5% exact: 0.0%
[1000Hz cache-misses], (all, 12 CPUs)<br>
----------------------------------------------------------------------------------------------------------------------------------------------------------------------<br>
<br>
<b>samples</b> <b>pcnt</b> function
DSO<br>
_______ _____ _______________________
____________________________________<br>
<br>
48.00 36.9% get_page_from_freelist
[kernel.kallsyms] <br>
12.00 9.2% JS_CallTracer
/usr/lib/xulrunner-1.9.2/libmozjs.so<br>
12.00 9.2% JS_TraceChildren
/usr/lib/xulrunner-1.9.2/libmozjs.so<br>
8.00 6.2% dso__find_symbol
/usr/bin/perf <br>
7.00 5.4% native_flush_tlb_single
[kernel.kallsyms] <br>
6.00 4.6% _int_malloc /lib/<a
moz-do-not-send="true" href="http://libc-2.12.90.so">libc-2.12.90.so</a>
<br>
<br>
<br>
What i want to know is the significance of different parameters
here which are the following:<br>
1. irqs/sec<br>
2. samples<br>
3. pcnt<br>
<br>
It also shows a value of 1000Hz. what is the meaning of that.<br>
<br>
I searched regarding these in the internet, but was unable to find
a good explanation<br>
<br>
Thanks<br>
Ankur<br>
<br>
<br>
<pre wrap="">
<fieldset class="mimeAttachmentHeader"></fieldset>
_______________________________________________
Kernelnewbies mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Kernelnewbies@kernelnewbies.org">Kernelnewbies@kernelnewbies.org</a>
<a class="moz-txt-link-freetext" href="http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies">http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies</a>
</pre>
</blockquote>
<br>
</body>
</html>