From: Ingo Molnar <mingo@elte.hu>
To: "Benjamin K. Stuhl" <benjamin.stuhl@colorado.edu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Thomas Gleixner <tglx@linutronix.de>,
Linux-Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: "sched: add vslice" causes horrible interactivity under load
Date: Sun, 27 Jan 2008 23:19:16 +0100 [thread overview]
Message-ID: <20080127221916.GA18482@elte.hu> (raw)
In-Reply-To: <20080127221702.GA18151@elte.hu>
* Ingo Molnar <mingo@elte.hu> wrote:
> > while such delays are happening? Please enable CONFIG_SCHED_DEBUG=y
> > and CONFIG_SCHEDSTATS=y as well before doing the dump. Also please
> > send your .config.
>
> another thing that might make a difference is to disable (or enable)
> the CONFIG_FAIR_GROUP_SCHED feature in the .config.
yet another thing to tune would be to decrease the value of
/proc/sys/kernel/sched_latency, and/or to subtract '4' from the value of
/proc/sys/kernel/sched_features. [it defaults to 7 in v2.6.24]
Ingo
next prev parent reply other threads:[~2008-01-27 22:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-27 21:44 "sched: add vslice" causes horrible interactivity under load Benjamin K. Stuhl
2008-01-27 22:14 ` Ingo Molnar
2008-01-27 22:17 ` Ingo Molnar
2008-01-27 22:19 ` Ingo Molnar [this message]
2008-01-28 15:32 ` Benjamin K. Stuhl
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