linux-kernel - Re: Problem: Load average of 6, no I/O, 25% idle time. Why?

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Message-Id: <1216387716.28405.45.camel@twins>
Date:	Fri, 18 Jul 2008 15:28:36 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Timothy Normand Miller <theosib@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Problem: Load average of 6, no I/O, 25% idle time. Why?

On Fri, 2008-07-18 at 08:49 -0400, Timothy Normand Miller wrote:
> I have a four processor box, running three compute loads.  The kernel
> I'm running is 2.6.25-gentoo-r5.
> 
> One process has four threads, and it's niced to 19.
> Another process has one thread and is niced to -10
> The last process has one thread and is niced to 0
> 
> One processor is always idle.
> 
> If I change either the 0 to a -10 or the -10 to a zero, then all four
> cores are properly utilized.
> 
> Does this make sense to anyone?  Besides messing with the nice levels,
> is there another way to fix this?

Please share at least your .config when reporting such issues.

Furthermore, could you try .26 and or Linus' latest -git to see if the
issue is still present?

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