From: Mike Galbraith <efault@gmx.de>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Frans Pop <elendil@planet.nl>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <peterz@infradead.org>,
linux-wireless@vger.kernel.org
Subject: Re: [.32-rc3] scheduler: iwlagn consistently high in "waiting for CPU"
Date: Thu, 08 Oct 2009 16:15:12 +0200 [thread overview]
Message-ID: <1255011312.7294.3.camel@marge.simson.net> (raw)
In-Reply-To: <20091008064521.07fae137@infradead.org>
On Thu, 2009-10-08 at 06:45 -0700, Arjan van de Ven wrote:
> On Thu, 08 Oct 2009 13:24:22 +0200
> Mike Galbraith <efault@gmx.de> wrote:
> > Latencytop was accounting uninterruptible and interruptible sleep
> > time up to 5ms, which is not the latency the user is looking for.
>
> it is for everything but the scheduler latency!
>
> latencytop wants to show where you're waiting for disk, etc etc.
> that's not "time on runqueue".
>
> for the scheduler delays a whole different codepath is used!
That explains.. a few things.
-Mike
prev parent reply other threads:[~2009-10-08 14:16 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-05 13:00 [.32-rc3] scheduler: iwlagn consistently high in "waiting for CPU" Frans Pop
2009-10-05 14:13 ` Frans Pop
2009-10-05 14:24 ` Arjan van de Ven
2009-10-06 15:49 ` Frans Pop
2009-10-07 17:10 ` Frans Pop
2009-10-07 18:10 ` Mike Galbraith
2009-10-07 18:34 ` Frans Pop
2009-10-08 4:05 ` Mike Galbraith
2009-10-08 6:23 ` Mike Galbraith
2009-10-08 13:40 ` Arjan van de Ven
2009-10-08 14:13 ` Mike Galbraith
2009-10-08 14:54 ` Mike Galbraith
2009-10-08 14:55 ` Frans Pop
2009-10-08 15:09 ` Arjan van de Ven
2009-10-08 18:23 ` Mike Galbraith
2009-10-08 20:34 ` Markus Trippelsdorf
2009-10-09 3:35 ` Mike Galbraith
2009-10-09 3:51 ` Markus Trippelsdorf
2009-10-08 20:59 ` Frans Pop
2009-10-09 3:04 ` Mike Galbraith
2009-10-09 6:35 ` Mike Galbraith
2009-10-09 7:13 ` Peter Zijlstra
2009-10-09 7:55 ` Sedat Dilek
2009-10-09 8:06 ` Peter Zijlstra
2009-10-09 16:27 ` Frans Pop
2009-10-09 20:06 ` Mike Galbraith
2009-10-08 11:24 ` Mike Galbraith
2009-10-08 13:09 ` Frans Pop
2009-10-08 13:18 ` Mike Galbraith
2009-10-08 13:45 ` Arjan van de Ven
2009-10-08 14:15 ` Mike Galbraith [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1255011312.7294.3.camel@marge.simson.net \
--to=efault@gmx.de \
--cc=arjan@infradead.org \
--cc=elendil@planet.nl \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-wireless@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=peterz@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).