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From: Felipe Alfaro Solana <felipe_alfaro@linuxmail.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: [patch] sched-2.6.0-test1-G3, interactivity changes, audio latency
Date: Sat, 26 Jul 2003 00:58:38 +0200	[thread overview]
Message-ID: <1059173917.573.6.camel@teapot.felipe-alfaro.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0307252146550.16235-100000@localhost.localdomain>

On Fri, 2003-07-25 at 21:59, Ingo Molnar wrote:
> my current "interactivity changes" scheduler patchset can be found at:
> 
> 	redhat.com/~mingo/O(1)-scheduler/sched-2.6.0-test1-G3
> 
> (this patch is mostly orthogonal to Con's patchset, but obviously collides
> patch-wise. The patch should also cleanly apply to 2.6.0-test1-bk2.)

For my workloads, this patch behaves just a little bit better than -G2,
but overall, X still feels jumpy, even under no load. I haven't been
able to reproduce any XMMS sound skips, due to the raising of
CHILD_PENALTY.

I've seen much better response times and less jerkiness of the system by
setting MAX_SLEEP_AVG at 1000000000 and STARVATION_LIMIT to HZ. With
these settings, under heavy load, no process starvation or slowdown can
be perceived, an opening new terminals, or launching processes is nearly
as fast as when the system is under no load. This is great, as the
vanilla scheduler is unable to handle this correctly.

Additionally, renicing X to -20 gives pretty good results for X
applications, like Evolution, but there are still some remanents of
jerkiness from time to time.



  parent reply	other threads:[~2003-07-25 22:43 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-25 19:59 Ingo Molnar
2003-07-25 21:13 ` [patch] sched-2.6.0-test1-G3 Rudo Thomas
2003-07-25 22:54   ` Diego Calleja García
2003-07-25 23:31     ` Rudo Thomas
2003-07-26  1:56   ` Con Kolivas
2003-07-27 12:33     ` Ingo Molnar
2003-07-25 22:58 ` Felipe Alfaro Solana [this message]
2003-07-25 23:30 ` [patch] sched-2.6.0-test1-G3, interactivity changes, audio latency Con Kolivas
2003-07-26 16:09 Guillaume Chazarain
2003-07-27  9:31 ` Mike Galbraith
2003-07-27 10:26 ` Ingo Molnar

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