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From: "Alexander E. Patrakov" <patrakov@ums.usu.ru>
To: linux-kernel@vger.kernel.org
Cc: elendil@planet.nl
Subject: Re: top displaying 9999% CPU usage
Date: Wed, 03 Oct 2007 19:03:40 +0600	[thread overview]
Message-ID: <4703932C.6060900@ums.usu.ru> (raw)
In-Reply-To: <200710031433.34504.elendil@planet.nl>

Frans Pop wrote:
> I saw top occasionally displaying 9999% CPU usage for a process. The
> first few times it was amarokapp, this last time it was kontact.
> Both applications were basically idle.
> The "cc1" is a kernel compile (rc9 + CFS :-).
> 
> I cannot remember seeing this before, but as I also don't run top that
> frequently I cannot be sure its a recent regression.

Try to capture the i/o log with the following command:

strace -o top.log top

This will show for sure whether the kernel gives out incorrect data or 
top misinterprets them.


-- 
Alexander E. Patrakov


  parent reply	other threads:[~2007-10-03 13:06 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-10-03 12:33 top displaying 9999% CPU usage Frans Pop
2007-10-03 12:52 ` Jan Engelhardt
2007-10-03 13:03 ` Alexander E. Patrakov [this message]
2007-10-03 14:04   ` Frans Pop
2007-10-03 14:43     ` Ilpo Järvinen
2007-10-03 14:51       ` Ilpo Järvinen
2007-10-03 19:27         ` Decreasing stime running confuses top (was: top displaying 9999% CPU usage) Frans Pop
2007-10-03 20:24           ` Willy Tarreau
2007-10-03 23:32             ` Frans Pop
2007-10-04 19:19               ` Luca Tettamanti
2007-10-04 19:32                 ` Decreasing stime running confuses top Chuck Ebbert
2007-10-04 20:00                   ` Christian Borntraeger
2007-10-04 20:21                     ` Chuck Ebbert
2007-10-04 21:10                       ` [PATCH for testing] " Christian Borntraeger
2007-10-04 22:01                         ` Chuck Ebbert
2007-10-04 22:31                           ` Christian Borntraeger
2007-10-05 11:43                           ` Luca
2007-10-05 15:07                           ` Frans Pop
2007-10-05 15:49                         ` Frans Pop
2007-10-08 16:49                           ` Christian Borntraeger
2007-10-08 17:00                             ` Ingo Molnar

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