From: Ingo Molnar <mingo@elte.hu>
To: Arjan van de Ven <arjan@infradead.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [patch] sched: Keep total / count stats in addition to the max for wait time
Date: Tue, 22 Jan 2008 22:06:59 +0100 [thread overview]
Message-ID: <20080122210659.GA26764@elte.hu> (raw)
In-Reply-To: <20080121110809.1b584998@laptopd505.fenrus.org>
* Arjan van de Ven <arjan@infradead.org> wrote:
> From: Arjan van de Ven <arjan@linux.intel.com>
> Subject: sched: Keep total / count stats in addition to the max for wait time
>
> Right now, the linux kernel (with scheduler statistics enabled) keeps
> track of the maximum time a process is waiting to be scheduled. While
> the maximum is a very useful metric, tracking average and total is
> equally useful (at least for latencytop) to figure out the accumulated
> effect of scheduler delays. The accumulated effect is important to
> judge the performance impact of scheduler tuning/behavior.
thanks, applied to sched-devel.git.
Ingo
prev parent reply other threads:[~2008-01-22 21:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-21 19:08 [patch] sched: Keep total / count stats in addition to the max for wait time Arjan van de Ven
2008-01-22 21:06 ` Ingo Molnar [this message]
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