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From: Peter Zijlstra <peterz@infradead.org>
To: Rakib Mullick <rakib.mullick@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: SCHED: Is task migration necessary in sched_exec().
Date: Wed, 23 Dec 2009 19:06:43 +0100	[thread overview]
Message-ID: <1261591603.4937.153.camel@laptop> (raw)
In-Reply-To: <b9df5fa10912230452q6edac4d3wb837a2e550cc5092@mail.gmail.com>

On Wed, 2009-12-23 at 18:52 +0600, Rakib Mullick wrote:

> Yes - a fair win. But if load balancer moves other tasks from the runqueue
> (2nd or 3rd task from your ex.) and thats how we also can achive 1/2 of cpu1's
> time , right? Those waiting tasks could have effective 0 cache footprint too.
> If they were not run before - right?

Could have, but is very unlikely, and here we have one we know for sure.


  reply	other threads:[~2009-12-23 18:07 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-12-23 10:14 SCHED: Is task migration necessary in sched_exec() Rakib Mullick
2009-12-23 10:21 ` Peter Zijlstra
2009-12-23 10:46   ` Rakib Mullick
2009-12-23 10:53     ` Peter Zijlstra
2009-12-23 11:35       ` Rakib Mullick
2009-12-23 11:51         ` Peter Zijlstra
2009-12-23 12:04           ` Rakib Mullick
2009-12-23 12:20             ` Peter Zijlstra
2009-12-23 12:52               ` Rakib Mullick
2009-12-23 18:06                 ` Peter Zijlstra [this message]
2009-12-25  2:53                   ` Rakib Mullick

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