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From: Sitsofe Wheeler <sitsofe@yahoo.com>
To: Arjan van de Ven <arjan@infradead.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
peterz@infradead.org
Subject: Re: How how latent should non-preemptive scheduling be?
Date: Wed, 17 Sep 2008 23:29:32 +0100 [thread overview]
Message-ID: <48D184CC.2040204@yahoo.com> (raw)
In-Reply-To: <20080917145400.29d1809c@infradead.org>
Arjan van de Ven wrote:
> On Wed, 17 Sep 2008 22:48:55 +0100
> Sitsofe Wheeler <sitsofe@yahoo.com> wrote:
>
>> Arjan van de Ven wrote:
>>> this says you haven't done "make install" on the latencytop
>>> directory so it's not translating things for you.. can you do that
>>> please?
>>> Cause Maximum
>>>
> Percentage
>
> Scheduler: waiting for cpu 208 msec 59.4 %
>
>
> you're rather CPU bound, and your process was woken up but didn't run for over 200 milliseconds..
> that sounds like a scheduler fairness issue!
I'm at a bit of a loss to explain this. I'm not using the group
scheduler and the load average is less than 0.4. CPU usage does seem to
spike a fair bit (I'm not sure why rhythmbox needs 50%+ for decoding
oggs from time to time) but there always seems to be 20% CPU free...
I don't know where to start debugging this one and I'm suspicious of the
way the problem would happen every 30 seconds too... (this laptop is
using ath5k for its wifi)
next prev parent reply other threads:[~2008-09-17 22:29 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fa.vMKgvqjqmYnI2J40GHoTENeYm8U@ifi.uio.no>
[not found] ` <fa.808p0ZtU9DCpeky4KfNS8Drdw9w@ifi.uio.no>
2008-09-17 21:48 ` Sitsofe Wheeler
2008-09-17 21:54 ` Arjan van de Ven
2008-09-17 22:29 ` Sitsofe Wheeler [this message]
2008-09-18 2:42 ` Peter Zijlstra
2008-09-18 18:25 ` Sitsofe Wheeler
2008-09-19 8:44 ` Ingo Molnar
[not found] <fa.ERZTl/6uH+mhNoef5fPJKTRjJag@ifi.uio.no>
[not found] ` <fa.PtPFzP5kIJVCCov6YCewrh+o4z4@ifi.uio.no>
[not found] ` <fa.C6WSm5Rh2Nb+Qho7b0qDOZ9RPV8@ifi.uio.no>
[not found] ` <fa.ch6j4qXs/2sFpLkHz5fXrtjTR8c@ifi.uio.no>
[not found] ` <fa.Jx/Ygtm46CVRawlA6OnfYNn6cN0@ifi.uio.no>
2008-09-18 7:26 ` Sitsofe Wheeler
[not found] ` <fa.iIHgL48F3T5VAqFw3mqaf9Pzrs4@ifi.uio.no>
[not found] ` <fa.Td8xkKZKMSMghlJmEYefTRVF2kc@ifi.uio.no>
2008-09-19 11:54 ` Sitsofe Wheeler
2008-09-19 14:20 ` Peter Zijlstra
2008-09-22 11:57 ` Ingo Molnar
2008-09-22 12:07 ` Steven Rostedt
2008-09-23 6:33 ` Sitsofe Wheeler
2008-09-23 11:53 ` Ingo Molnar
2008-09-23 16:30 ` Sitsofe Wheeler
2008-09-23 19:39 ` Sitsofe Wheeler
2008-09-23 22:01 ` Sitsofe Wheeler
2008-09-27 20:48 ` Ingo Molnar
2008-09-28 20:56 ` Sitsofe Wheeler
2008-09-29 8:37 ` Ingo Molnar
2008-09-29 23:11 ` Sitsofe Wheeler
2008-09-30 11:22 ` Ingo Molnar
2008-09-30 13:18 ` Sitsofe Wheeler
2008-09-17 21:18 Sitsofe Wheeler
2008-09-17 21:28 ` Sitsofe Wheeler
2008-09-17 21:34 ` Arjan van de Ven
2008-09-21 20:56 ` Matt Keenan
2008-09-22 6:50 ` Sitsofe Wheeler
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