From: "Parag Warudkar" <parag.warudkar@gmail.com>
To: "Ingo Molnar" <mingo@elte.hu>
Cc: "Linus Torvalds" <torvalds@linux-foundation.org>,
"Arjan van de Ven" <arjan@infradead.org>,
"Sam Ravnborg" <sam@ravnborg.org>,
LKML <linux-kernel@vger.kernel.org>,
"akpm@osdl.org" <akpm@linux-foundation.org>,
"Peter Zijlstra" <peterz@infradead.org>,
"Dave Jones" <davej@redhat.com>
Subject: Re: [PATCH] default to n for GROUP_SCHED and FAIR_GROUP_SCHED
Date: Mon, 5 May 2008 17:40:49 -0400 [thread overview]
Message-ID: <82e4877d0805051440o273b6a6dge7f0af310c266fb7@mail.gmail.com> (raw)
In-Reply-To: <20080505210526.GA1702@elte.hu>
On Mon, May 5, 2008 at 5:05 PM, Ingo Molnar <mingo@elte.hu> wrote:
>
> This is now believed to be fixed in sched-devel.git, via the "single
> runqueue" and deadline-scheduling patches from Peter that flattens the
> hierarchy of the group scheduler.
>
> Another latency source was the skew of sched_clock() running too slow -
> that way if the clock runs at 10% of its intended speed the scheduler
> will turn a 40msec intended latency target into a 400 msec latency
> target!
>
> This bug too is now believed to be fixed via Peter's new sched_clock
> code in sched-devel.git.
Ok, but the latency problems are not fixed with sched-devel as of
today. I still get unusable audio if I enable GROUP_SCHED stuff on
sched-devel and run make -j8 .
Parag
next prev parent reply other threads:[~2008-05-05 21:41 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-04 0:42 Parag Warudkar
2008-05-04 9:24 ` Ingo Molnar
2008-05-05 15:14 ` Parag Warudkar
2008-05-05 17:15 ` Ingo Molnar
2008-05-05 18:24 ` Sam Ravnborg
2008-05-05 18:36 ` Sergio Luis
2008-05-05 18:45 ` Ingo Molnar
2008-05-05 19:49 ` [PATCH] kconfig: add support for stdin (make K=- ...) Sam Ravnborg
2008-05-06 3:51 ` Oleg Verych
2008-05-05 19:05 ` [PATCH] default to n for GROUP_SCHED and FAIR_GROUP_SCHED Sam Ravnborg
2008-05-05 18:42 ` Ingo Molnar
2008-05-05 19:01 ` Sam Ravnborg
2008-05-05 19:56 ` Arjan van de Ven
2008-05-05 20:27 ` Ingo Molnar
2008-05-05 20:48 ` Linus Torvalds
2008-05-05 21:05 ` Ingo Molnar
2008-05-05 21:40 ` Parag Warudkar [this message]
2008-05-25 19:30 ` Roman Zippel
2008-05-05 17:21 ` Ingo Molnar
2008-05-05 17:33 ` Jesse Barnes
2008-05-05 18:36 ` Ingo Molnar
2008-05-05 21:36 ` Parag Warudkar
2008-05-05 21:49 ` Ingo Molnar
2008-05-06 0:38 ` Ingo Molnar
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