From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Josef Bacik <jbacik@fb.com>
Cc: bmaurer@fb.com, rkroll@fb.com, kernel-team@fb.com,
mingo@redhat.com, peterz@infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] sched/fair: change where we report sched stats
Date: Sun, 14 Dec 2014 10:56:41 +0100 [thread overview]
Message-ID: <1418551001.14250.25.camel@marge.simpson.net> (raw)
In-Reply-To: <5489B07E.9000200@fb.com>
On Thu, 2014-12-11 at 09:55 -0500, Josef Bacik wrote:
> How did you do it? I had one latency spike in a 90 minute test that
> runs across 30 boxes that could have been caused by anything, so if
> there is a way I could have easily found that without moving these
> tracepoints around I'd love to hear it. Thanks,
If I have a target, I tend to set tracing_off() traps.
Seems you want an ftrace tracer that tracks sched_switch sleeping to
sched_switch running in addition to the wakeup latency tracer.
-Mike
prev parent reply other threads:[~2014-12-14 9:56 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-09 18:21 Josef Bacik
2014-12-10 6:23 ` Mike Galbraith
2014-12-10 21:48 ` Josef Bacik
2014-12-11 3:34 ` Mike Galbraith
2014-12-11 14:55 ` Josef Bacik
2014-12-14 9:56 ` Mike Galbraith [this message]
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