From: Ingo Molnar <mingo@elte.hu>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@osdl.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Avoid moving tasks when a schedule can be made.
Date: Wed, 1 Feb 2006 14:11:11 +0100 [thread overview]
Message-ID: <20060201131111.GA27793@elte.hu> (raw)
In-Reply-To: <20060201130818.GA26481@elte.hu>
* Ingo Molnar <mingo@elte.hu> wrote:
> i think the right approach would be to split up this work into smaller
> chunks. Or rather, lets first see how this can happen: why is
> can_migrate() false for so many tasks? Are they all cpu-hot? If yes,
> shouldnt we simply skip only up to a limit of tasks in this case -
> it's not like we want to spend 1.5 msecs searching for a cache-cold
> task which might give us a 50 usecs advantage over cache-hot tasks ...
the only legimate case where we have to skip alot of tasks is the case
when there are alot of CPU-bound (->cpus_alowed) tasks in the runqueue.
In that case the scheduler really has to skip that task. But that is not
an issue in your workload.
Ingo
next prev parent reply other threads:[~2006-02-01 13:12 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-31 19:43 [PATCH] Avoid moving tasks when a schedule can be made Steven Rostedt
2006-02-01 3:36 ` Peter Williams
2006-02-01 12:44 ` Steven Rostedt
2006-02-01 13:06 ` Nick Piggin
2006-02-01 13:10 ` Nick Piggin
2006-02-01 13:20 ` Ingo Molnar
2006-02-01 13:47 ` Nick Piggin
2006-02-01 13:54 ` Nick Piggin
2006-02-01 14:12 ` Ingo Molnar
2006-02-01 14:25 ` Nick Piggin
2006-02-01 14:37 ` Ingo Molnar
2006-02-01 14:54 ` Nick Piggin
2006-02-01 15:11 ` Ingo Molnar
2006-02-01 15:31 ` Nick Piggin
2006-02-01 16:10 ` Ingo Molnar
2006-02-01 16:25 ` Nick Piggin
2006-02-01 17:24 ` Ingo Molnar
2006-02-06 11:21 ` Nick Piggin
2006-02-01 14:00 ` Ingo Molnar
2006-02-01 14:09 ` Nick Piggin
2006-02-01 14:22 ` Ingo Molnar
2006-02-01 14:32 ` Steven Rostedt
2006-02-02 1:26 ` Peter Williams
2006-02-02 2:48 ` Steven Rostedt
2006-02-02 3:19 ` Peter Williams
2006-02-01 13:08 ` Ingo Molnar
2006-02-01 13:11 ` Ingo Molnar [this message]
2006-02-02 1:42 ` Peter Williams
2006-02-02 2:51 ` Steven Rostedt
2006-02-01 13:15 ` Steven Rostedt
2006-02-01 13:23 ` Steven Rostedt
2006-02-01 13:26 ` Ingo Molnar
2006-02-01 16:11 ` Steven Rostedt
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