From: Con Kolivas <kernel@kolivas.org>
To: steve.rotolo@ccur.com
Cc: linux-kernel@vger.kernel.org, bugsy@ccur.com
Subject: Re: SD_SHARE_CPUPOWER breaks scheduler fairness
Date: Thu, 2 Jun 2005 07:37:16 +1000 [thread overview]
Message-ID: <200506020737.20098.kernel@kolivas.org> (raw)
In-Reply-To: <1117651285.22879.73.camel@bonefish>
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On Thu, 2 Jun 2005 04:41, Steve Rotolo wrote:
> I guess the bottom-line is: given N logical cpus, 1/N of all
> SCHED_NORMAL tasks may get stuck on a sibling cpu with no chance to
> run. All it takes is one spinning SCHED_FIFO task. Sounds like a bug.
You're right, and excuse me for missing it. We have to let SCHED_NORMAL tasks
run for some period with rt tasks. There shouldn't be any combination of
mutually exclusive tasks for siblings.
I'll work on something.
Cheers,
Con
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next prev parent reply other threads:[~2005-06-01 21:38 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-31 17:46 SD_SHARE_CPUPOWER breaks scheduler fairness Steve Rotolo
2005-06-01 2:49 ` Con Kolivas
2005-06-01 14:29 ` Steve Rotolo
2005-06-01 14:47 ` Con Kolivas
2005-06-01 18:41 ` Steve Rotolo
2005-06-01 21:37 ` Con Kolivas [this message]
2005-06-01 21:54 ` Con Kolivas
2005-06-01 22:01 ` Steve Rotolo
2005-06-02 3:01 ` Con Kolivas
2005-06-01 23:16 ` Joe Korty
2005-06-01 23:25 ` Con Kolivas
2005-06-02 13:30 ` Steve Rotolo
2005-06-02 13:34 ` Con Kolivas
2005-06-02 15:48 ` Steve Rotolo
2005-06-03 0:43 ` [PATCH] SCHED: run SCHED_NORMAL tasks with real time tasks on SMT siblings Con Kolivas
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