From: David Ahern <dsahern@gmail.com>
To: "Pavey, Nicholas" <npavey@akamai.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Using perf to locate source of context switches
Date: Wed, 04 Dec 2013 11:47:48 -0700 [thread overview]
Message-ID: <529F78D4.10905@gmail.com> (raw)
In-Reply-To: <CEC4D35C.A428%npavey@akamai.com>
On 12/4/13, 10:42 AM, Pavey, Nicholas wrote:
> NB: I have also used 'perf record -e cs -g -a -- sleep 2', while the
Add -c 1 to capture *all* context switch events.
perf script will show each event. perf report provides a histogram summary.
I have a time-history command for analyzing scheduling events. It is not
yet in upstream code. You can try the code in this branch:
https://github.com/dsahern/linux/tree/perf-sched-timehist-3.11
Or download this version (requires Arnaldo's tree):
https://lkml.org/lkml/2013/11/18/555
David
next prev parent reply other threads:[~2013-12-04 18:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-04 17:42 Using perf to locate source of context switches Pavey, Nicholas
2013-12-04 18:47 ` David Ahern [this message]
-- strict thread matches above, loose matches on Subject: below --
2013-12-04 17:35 Pavey, Nicholas
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