From: Con Kolivas <kernel@kolivas.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [patch] sched-2.6.0-test1-G6, interactivity changes
Date: Mon, 28 Jul 2003 18:50:04 +1000 [thread overview]
Message-ID: <1059382204.3f24e3bc32d56@kolivas.org> (raw)
In-Reply-To: <Pine.LNX.4.44.0307280921360.3537-100000@localhost.localdomain>
Quoting Ingo Molnar <mingo@elte.hu>:
>
> On Mon, 28 Jul 2003, Con Kolivas wrote:
>
> > On Sun, 27 Jul 2003 23:40, Ingo Molnar wrote:
> > > - further increase timeslice granularity
> >
> > For a while now I've been running a 1000Hz 2.4 O(1) kernel tree that
> > uses timeslice granularity set to MIN_TIMESLICE which has stark
> > smoothness improvements in X. I've avoided promoting this idea because
> > of the theoretical drop in throughput this might cause. I've not been
> > able to see any detriment in my basic testing of this small granularity,
> > so I was curious to see what you throught was a reasonable lower limit?
>
> it's a hard question. The 25 msecs in -G6 is probably too low.
Just another thought on that is to make sure they don't get requeued to start
with just 2 ticks left - which would happen to all nice 0 tasks running their
full timeslice. Here is what I'm doing in O10:
+ } else if (!((task_timeslice(p) - p->time_slice) %
+ TIMESLICE_GRANULARITY) && (p->time_slice > MIN_TIMESLICE) &&
+ (p->array == rq->active)) {
Con
next prev parent reply other threads:[~2003-07-28 8:35 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-27 13:40 [patch] sched-2.6.0-test1-G6, interactivity changes Ingo Molnar
2003-07-27 14:03 ` Con Kolivas
2003-07-28 7:24 ` Ingo Molnar
2003-07-28 8:50 ` Con Kolivas [this message]
2003-07-28 21:38 ` Bill Davidsen
2003-07-28 22:00 ` Con Kolivas
2003-07-30 2:49 ` Bill Davidsen
2003-08-08 19:41 ` Rob Landley
2003-07-27 19:18 ` Felipe Alfaro Solana
2003-07-28 6:04 ` Mike Galbraith
2003-07-28 6:45 ` Andre Hedrick
2003-07-28 7:05 ` Con Kolivas
2003-07-28 7:33 ` Mike Galbraith
2003-07-28 7:44 ` Ingo Molnar
2003-07-30 14:24 ` Szonyi Calin
[not found] ` <Pine.LNX.4.44.0307280935300.4596-100000@localhost.localdom ain>
2003-07-28 8:15 ` Mike Galbraith
2003-07-28 8:42 ` Con Kolivas
2003-07-28 8:49 ` Mike Galbraith
[not found] ` <Pine.LNX.4.10.10307272338160.30891-100000@master.linux-ide .org>
2003-07-28 7:27 ` Mike Galbraith
2003-07-28 17:33 ` Andre Hedrick
[not found] ` <Pine.LNX.4.10.10307281030180.30891-100000@master.linux-ide .org>
2003-07-29 7:44 ` Mike Galbraith
2003-07-28 17:17 ` Jose Luis Domingo Lopez
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