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From: Andi Kleen <andi@firstfloor.org>
To: Qu Wenruo <quwenruo@cn.fujitsu.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: Ideas to measure kernel function execution time using perf
Date: Wed, 20 Apr 2016 06:09:25 -0700	[thread overview]
Message-ID: <87a8kowhoa.fsf@tassilo.jf.intel.com> (raw)
In-Reply-To: <57158D19.7070307@cn.fujitsu.com> (Qu Wenruo's message of "Tue, 19 Apr 2016 09:42:49 +0800")

Qu Wenruo <quwenruo@cn.fujitsu.com> writes:

> Hi,
>
> Is there any method to measure kernel function execution time for
> specific functions using perf?

You can use processor trace on newer Intel CPUs (especially
Skylake) for this.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only

      parent reply	other threads:[~2016-04-20 13:09 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-19  1:42 Ideas to measure kernel function execution time using perf Qu Wenruo
2016-04-19 23:37 ` Masami Hiramatsu
2016-04-20  0:52   ` Qu Wenruo
2016-04-20  2:02   ` Arnaldo Carvalho de Melo
2016-04-20 13:09 ` Andi Kleen [this message]

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