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From: Andrew Morton <akpm@linux-foundation.org>
To: "J.C. Pizarro" <jcpiza@gmail.com>
Cc: "Rik van Riel" <riel@redhat.com>,
	"Mike Galbraith" <efault@gmx.de>,
	LKML <linux-kernel@vger.kernel.org>,
	"Linus Torvalds" <torvalds@linux-foundation.org>
Subject: Re: Please, put 64-bit counter per task and incr.by.one each ctxt switch.
Date: Mon, 25 Feb 2008 12:34:39 -0800	[thread overview]
Message-ID: <20080225123439.90645f2f.akpm@linux-foundation.org> (raw)
In-Reply-To: <998d0e4a0802240512t859c5a1y3c30bd401530a43@mail.gmail.com>

On Sun, 24 Feb 2008 14:12:47 +0100 "J.C. Pizarro" <jcpiza@gmail.com> wrote:

> It's statistic, yes, but it's a very important parameter for the CPU-scheduler.
> The CPU-scheduler will know the number of context switches of each task
>  before of to take a blind decision into infinitum!.

We already have these:

        unsigned long nvcsw, nivcsw; /* context switch counts */

in the task_struct.

  parent reply	other threads:[~2008-02-25 20:36 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-24  3:08 J.C. Pizarro
2008-02-24  3:17 ` Rik van Riel
2008-02-24  4:08   ` J.C. Pizarro
2008-02-24  4:26     ` Rik van Riel
2008-02-24 13:12       ` J.C. Pizarro
2008-02-24 17:53         ` Mike Galbraith
2008-02-25 20:34         ` Andrew Morton [this message]
2008-02-26 13:20           ` J.C. Pizarro
2008-02-26 13:41             ` Alexey Dobriyan
2008-02-24  5:08     ` Mike Galbraith

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