linux-kernel - Re: [RFC 3/4] Disable scheduler tick when we are running SCHED

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Message-ID: <87vd6gweo6.fsf@basil.nowhere.org>
Date:	Wed, 08 Sep 2010 15:25:13 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Jan Blunck <jblunck@...e.de>
Cc:	Linux-Kernel Mailinglist <linux-kernel@...r.kernel.org>,
	linux-rt-users@...r.kernel.org, peterz@...radead.org,
	Sven-Thorsten Dietrich <sdietrich@...ell.com>,
	Michael Galbraith <MGalbraith@...ell.com>
Subject: Re: [RFC 3/4] Disable scheduler tick when we are running SCHED_FIFO tasks

Jan Blunck <jblunck@...e.de> writes:

> This patch is disabling the scheduler tick to go off when there is a task
> with SCHED_FIFO policy running. Since these tasks are not timesliced anyway
> we only care about timers, softirqs and such stuff just like when we disable
> the tick during idle periods.

How would these tasks accounted for then? 

The CPU time accounting relies on the timer tick currently.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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