<div dir="ltr"><div><div>My confusion is how to interpret this output from perf , what are copy_user_generic_unrolled and native_safe_halt for instance ?<br><br></div>I have profiled iozone benchmark using other tools like gprof and callgrind and they show me the actual functions being called by iozone as apparent from the source code.<br>
<br></div>But what is this perf output showing me then ? Are generic_file_buffered_write , ext4_file_write etc all system calls ?<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Jul 25, 2013 at 2:59 PM, Mulyadi Santosa <span dir="ltr"><<a href="mailto:mulyadi.santosa@gmail.com" target="_blank">mulyadi.santosa@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On Tue, Jul 16, 2013 at 2:48 PM, Nitisha Jain <<a href="mailto:nitishajain15@gmail.com">nitishajain15@gmail.com</a>> wrote:<br>
> Hello all,<br>
><br>
> I am running the Iozone benchmark commands to find disk characteristics on<br>
> my system and<br>
> trying to construct a call graph for the iozone functions.<br>
> I am using perf tools to generate a call graph , but I am having trouble<br>
> understanding the output from the perf commands as follows--<br>
<br>
</div>exactly, what is your confusion?<br>
<span class="HOEnZb"><font color="#888888"><br>
<br>
--<br>
regards,<br>
<br>
Mulyadi Santosa<br>
Freelance Linux trainer and consultant<br>
<br>
blog: <a href="http://the-hydra.blogspot.com" target="_blank">the-hydra.blogspot.com</a><br>
training: <a href="http://mulyaditraining.blogspot.com" target="_blank">mulyaditraining.blogspot.com</a><br>
</font></span></blockquote></div><br><br clear="all"><br>-- <br><br>Thanks and regards,<br><br><b>Nitisha Jain</b><br>9483004565<br>
</div>