From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Mike Galbraith <efault@gmx.de>
Cc: Ani <asinha@zeugmasystems.com>,
Lucas De Marchi <lucas.de.marchi@gmail.com>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>
Subject: Re: question on sched-rt group allocation cap: sched_rt_runtime_us
Date: Mon, 07 Sep 2009 09:59:34 +0200 [thread overview]
Message-ID: <1252310374.7564.6.camel@twins> (raw)
In-Reply-To: <1252218779.6126.17.camel@marge.simson.net>
On Sun, 2009-09-06 at 08:32 +0200, Mike Galbraith wrote:
> On Sat, 2009-09-05 at 19:32 -0700, Ani wrote:
> > On Sep 5, 3:50 pm, Lucas De Marchi <lucas.de.mar...@gmail.com> wrote:
> > >
> > > Indeed. I've tested this same test program in a single core machine and it
> > > produces the expected behavior:
> > >
> > > rt_runtime_us / rt_period_us % loops executed in SCHED_OTHER
> > > 95% 4.48%
> > > 60% 54.84%
> > > 50% 86.03%
> > > 40% OTHER completed first
> > >
> >
> > Hmm. This does seem to indicate that there is some kind of
> > relationship with SMP. So I wonder whether there is a way to turn this
> > 'RT bandwidth accumulation' heuristic off.
>
> No there isn't..
Actually there is, use cpusets to carve the system into partitions.
next prev parent reply other threads:[~2009-09-07 7:58 UTC|newest]
Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <dgRNo-3uc-5@gated-at.bofh.it>
[not found] ` <dhb9j-1hp-5@gated-at.bofh.it>
[not found] ` <dhcf5-263-13@gated-at.bofh.it>
2009-09-06 2:32 ` question on sched-rt group allocation cap: sched_rt_runtime_us Ani
2009-09-06 6:32 ` Mike Galbraith
2009-09-06 10:18 ` Mike Galbraith
[not found] ` <DDFD17CC94A9BD49A82147DDF7D545C54DC482@exchange.ZeugmaSystems.local>
2009-09-06 15:09 ` Mike Galbraith
2009-09-07 0:41 ` Anirban Sinha
[not found] ` <1252311463.7586.26.camel@marge.simson.net>
2009-09-07 11:06 ` [rfc] lru_add_drain_all() vs isolation Peter Zijlstra
2009-09-07 11:06 ` Peter Zijlstra
2009-09-07 13:35 ` Oleg Nesterov
2009-09-07 13:35 ` Oleg Nesterov
2009-09-07 13:53 ` Peter Zijlstra
2009-09-07 13:53 ` Peter Zijlstra
2009-09-07 14:18 ` Oleg Nesterov
2009-09-07 14:18 ` Oleg Nesterov
2009-09-07 14:25 ` Peter Zijlstra
2009-09-07 14:25 ` Peter Zijlstra
2009-09-07 23:56 ` KOSAKI Motohiro
2009-09-07 23:56 ` KOSAKI Motohiro
2009-09-08 8:20 ` Peter Zijlstra
2009-09-08 8:20 ` Peter Zijlstra
2009-09-08 10:06 ` KOSAKI Motohiro
2009-09-08 10:06 ` KOSAKI Motohiro
2009-09-08 10:20 ` Peter Zijlstra
2009-09-08 10:20 ` Peter Zijlstra
2009-09-08 11:41 ` KOSAKI Motohiro
2009-09-08 11:41 ` KOSAKI Motohiro
2009-09-08 12:05 ` Peter Zijlstra
2009-09-08 12:05 ` Peter Zijlstra
2009-09-08 14:03 ` Christoph Lameter
2009-09-08 14:03 ` Christoph Lameter
2009-09-08 14:20 ` Peter Zijlstra
2009-09-08 14:20 ` Peter Zijlstra
2009-09-08 15:22 ` Christoph Lameter
2009-09-08 15:22 ` Christoph Lameter
2009-09-08 15:27 ` Peter Zijlstra
2009-09-08 15:27 ` Peter Zijlstra
2009-09-08 15:32 ` Christoph Lameter
2009-09-08 15:32 ` Christoph Lameter
2009-09-09 4:27 ` KOSAKI Motohiro
2009-09-09 4:27 ` KOSAKI Motohiro
2009-09-09 14:08 ` Christoph Lameter
2009-09-09 14:08 ` Christoph Lameter
2009-09-09 23:43 ` KOSAKI Motohiro
2009-09-09 23:43 ` KOSAKI Motohiro
2009-09-10 18:03 ` Christoph Lameter
2009-09-10 18:03 ` Christoph Lameter
2009-09-09 15:39 ` Minchan Kim
2009-09-09 15:39 ` Minchan Kim
2009-09-09 16:18 ` Lee Schermerhorn
2009-09-09 16:18 ` Lee Schermerhorn
2009-09-09 16:46 ` Minchan Kim
2009-09-09 16:46 ` Minchan Kim
2009-09-09 23:58 ` KOSAKI Motohiro
2009-09-09 23:58 ` KOSAKI Motohiro
2009-09-10 1:00 ` Minchan Kim
2009-09-10 1:00 ` Minchan Kim
2009-09-10 1:15 ` KOSAKI Motohiro
2009-09-10 1:15 ` KOSAKI Motohiro
2009-09-10 1:23 ` Minchan Kim
2009-09-10 1:23 ` Minchan Kim
2009-09-09 2:06 ` KOSAKI Motohiro
2009-09-09 2:06 ` KOSAKI Motohiro
[not found] ` <DDFD17CC94A9BD49A82147DDF7D545C54DC483@exchange.ZeugmaSystems.local>
[not found] ` <DDFD17CC94A9BD49A82147DDF7D545C54DC485@exchange.ZeugmaSystems.local>
2009-09-07 0:28 ` question on sched-rt group allocation cap: sched_rt_runtime_us Anirban Sinha
2009-09-07 6:54 ` Mike Galbraith
[not found] ` <DDFD17CC94A9BD49A82147DDF7D545C54DC489@exchange.ZeugmaSystems.local>
2009-09-08 7:10 ` Anirban Sinha
2009-09-08 9:26 ` Mike Galbraith
2009-09-07 7:59 ` Peter Zijlstra [this message]
2009-09-07 8:24 ` Mike Galbraith
[not found] ` <DDFD17CC94A9BD49A82147DDF7D545C54DC487@exchange.ZeugmaSystems.local>
2009-09-08 7:08 ` Anirban Sinha
2009-09-08 8:42 ` Peter Zijlstra
2009-09-08 14:41 ` Anirban Sinha
[not found] ` <DDFD17CC94A9BD49A82147DDF7D545C54DC48B@exchange.ZeugmaSystems.local>
2009-09-08 17:41 ` Anirban Sinha
2009-09-08 19:06 ` Mike Galbraith
2009-09-08 19:34 ` Anirban Sinha
2009-09-09 4:10 ` Mike Galbraith
2009-09-05 17:13 Anirban Sinha
[not found] <Acotv57vW6nkRxQOQLuBf8W5yfJIlwAAtMAw>
2009-09-05 0:55 ` Anirban Sinha
2009-09-05 17:43 ` Lucas De Marchi
2009-09-05 20:40 ` Fabio Checconi
2009-09-05 22:40 ` Lucas De Marchi
[not found] ` <DDFD17CC94A9BD49A82147DDF7D545C54DC481@exchange.ZeugmaSystems.local>
2009-09-06 0:47 ` Anirban Sinha
2009-09-06 13:21 ` Fabio Checconi
[not found] ` <DDFD17CC94A9BD49A82147DDF7D545C54DC484@exchange.ZeugmaSystems.local>
2009-09-07 0:26 ` Anirban Sinha
2009-09-08 17:26 ` Anirban Sinha
2009-09-08 21:37 ` Anirban Sinha
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