From: Mike Galbraith <efault@gmx.de>
To: Kasper Sandberg <lkml@metanurb.dk>
Cc: Gene Heskett <gene.heskett@gmail.com>,
Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Con Kolivas <kernel@kolivas.org>, Nick Piggin <npiggin@suse.de>,
Arjan van de Ven <arjan@infradead.org>,
Peter Williams <pwil3058@bigpond.net.au>,
Thomas Gleixner <tglx@linutronix.de>,
caglar@pardus.org.tr, Willy Tarreau <w@1wt.eu>,
Mark Lord <lkml@rtr.ca>, Zach Carter <linux@zachcarter.com>,
buddabrod <buddabrod@gmail.com>
Subject: Re: [patch] CFS scheduler, -v6
Date: Fri, 27 Apr 2007 08:01:19 +0200 [thread overview]
Message-ID: <1177653679.25885.23.camel@Homer.simpson.net> (raw)
In-Reply-To: <1177646573.6520.4.camel@Homer.simpson.net>
On Fri, 2007-04-27 at 06:02 +0200, Mike Galbraith wrote:
> On Thu, 2007-04-26 at 22:09 +0200, Kasper Sandberg wrote:
> > On Thu, 2007-04-26 at 10:41 -0400, Gene Heskett wrote:
> > <snip>
> > >
> > > Compared to mainline? I still think this is a 100% keeper for desktop users
> > > like me.
> >
> > Here its alot worse, just playing an ogg with ogg123 even without
> > anything reniced (X is 0), just pressing a link in konqueror can make
> > audio skip (ogg123 fails to fill the alsa buffer, and thus it skips).
>
> What arguments are you passing to ogg123? I'm creating some ogg files
> right now, and would like to reproduce these skips to see why they're
> happening if possible.
Well, I can't reproduce any skips with my config. That doesn't mean
anything wrt _your_ skips of course. Maybe it's a config or hardware
difference. With my 3GHz P4 low latency desktop full preempt setup,
ogg123 works absolutely flawlessly (using default settings) both in UP
and SMP configurations, even under quite hefty load.
I do get some ALSA gripes when doing heavy IO...
root@Homer: grep ALSA /ogg123.log
Audio Device: Advanced Linux Sound Architecture (ALSA) output
ALSA: underrun, at least 0ms.04:49.37 (103.0 kbps) Output Buffer 12.5%
ALSA: underrun, at least 0ms.04:15.20 (102.1 kbps) Output Buffer 12.5%
ALSA: underrun, at least 0ms.03:30.80 (126.7 kbps) Output Buffer 96.9%
ALSA: underrun, at least 0ms.05:15.93 ( 99.9 kbps) Output Buffer 25.0%
...but no audible effect whatsoever. Heavy IO to my very full and
likely fragmented ext3 filesystem is a very big problem here no matter
what CPU or IO scheduler I'm using.
As I write this, I've got a heavy kernel build running, and was browsing
around with firefox and konqueror, checking mail etc etc as it was
running. I definitely feel the load (no surprise;), but ogg123 is
delivering dropout free audio. (this is the UP cfs-v6 kernel)
top - 07:34:56 up 1:00, 13 users, load average: 35.92, 34.72, 24.21
Tasks: 294 total, 31 running, 263 sleeping, 0 stopped, 0 zombie
Cpu(s): 93.8%us, 6.2%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
24878 root 20 0 28628 24m 4176 R 3.5 2.5 0:01.56 cc1
25236 root 20 0 22608 18m 3964 R 3.5 1.9 0:00.47 cc1
25385 root 20 0 17184 11m 2196 R 3.5 1.2 0:00.23 cc1
25405 root 20 0 15996 10m 2196 R 3.5 1.0 0:00.18 cc1
24668 root 20 0 35828 31m 4152 R 3.0 3.1 0:02.07 cc1
24763 root 20 0 36420 32m 4160 R 3.0 3.2 0:01.86 cc1
24976 root 20 0 26880 23m 4156 R 3.0 2.3 0:01.23 cc1
25054 root 20 0 25016 21m 4140 R 3.0 2.1 0:01.00 cc1
25058 root 20 0 28272 24m 4140 R 3.0 2.4 0:00.97 cc1
25090 root 20 0 27384 23m 4140 R 3.0 2.4 0:00.94 cc1
25123 root 20 0 26068 22m 4120 R 3.0 2.2 0:00.89 cc1
25270 root 20 0 22584 18m 3976 R 3.0 1.8 0:00.42 cc1
25303 root 20 0 18232 14m 4024 R 3.0 1.5 0:00.33 cc1
25310 root 20 0 20436 15m 2196 R 3.0 1.5 0:00.32 cc1
25348 root 20 0 19176 14m 3948 R 3.0 1.5 0:00.29 cc1
25349 root 20 0 19408 14m 2196 R 3.0 1.4 0:00.29 cc1
25360 root 20 0 19432 13m 2196 R 3.0 1.4 0:00.28 cc1
25395 root 20 0 17136 11m 2196 R 3.0 1.1 0:00.21 cc1
25426 root 20 0 12608 7732 2184 R 3.0 0.7 0:00.10 cc1
25432 root 20 0 12528 6936 2184 R 3.0 0.7 0:00.09 cc1
23766 root 20 0 44116 39m 4104 R 2.5 4.0 0:03.74 cc1
25124 root 20 0 6380 4084 972 R 2.5 0.4 0:00.05 as
25183 root 20 0 24948 20m 4052 R 2.5 2.1 0:00.73 cc1
25363 root 20 0 17156 13m 3820 S 2.5 1.3 0:00.26 cc1
25445 root 20 0 10268 5404 2140 R 2.5 0.5 0:00.05 cc1
25452 root 20 0 10096 3680 1384 R 1.5 0.4 0:00.03 cc1
5355 root 15 -5 185m 26m 4716 S 1.0 2.6 3:11.71 Xorg
25184 root 20 0 5576 3284 848 R 1.0 0.3 0:00.02 as
6396 root 20 0 14960 3100 2168 R 0.5 0.3 0:12.50 ogg123
next prev parent reply other threads:[~2007-04-27 6:01 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-25 21:47 Ingo Molnar
2007-04-26 2:14 ` Gene Heskett
2007-04-26 3:29 ` Nick Piggin
2007-04-26 3:49 ` Andrew Morton
2007-04-26 4:16 ` William Lee Irwin III
2007-04-26 8:27 ` Ingo Molnar
2007-04-26 9:18 ` Ingo Molnar
2007-04-26 14:06 ` Redeeman
2007-04-26 14:41 ` Gene Heskett
2007-04-26 20:09 ` Kasper Sandberg
2007-04-26 21:21 ` Gene Heskett
2007-04-27 4:02 ` Mike Galbraith
2007-04-27 6:01 ` Mike Galbraith [this message]
2007-04-27 11:53 ` Ingo Molnar
2007-04-27 11:55 ` Ingo Molnar
2007-04-27 13:39 ` Thomas Gleixner
2007-04-27 13:41 ` Ingo Molnar
2007-04-27 13:44 ` Thomas Gleixner
2007-04-28 15:35 ` Kasper Sandberg
2007-04-28 20:45 ` Lee Revell
2007-04-29 1:18 ` Kasper Sandberg
2007-04-29 5:30 ` Willy Tarreau
2007-04-29 6:45 ` Mike Galbraith
2007-04-29 6:59 ` Ingo Molnar
2007-04-29 7:16 ` Willy Tarreau
2007-04-29 7:30 ` Ingo Molnar
2007-04-29 7:38 ` Willy Tarreau
2007-04-29 8:00 ` Ingo Molnar
2007-04-29 8:02 ` Willy Tarreau
2007-04-29 9:52 ` Con Kolivas
2007-04-29 10:19 ` Mike Galbraith
2007-04-29 7:54 ` William Lee Irwin III
2007-04-29 8:03 ` Ingo Molnar
2007-04-29 8:16 ` William Lee Irwin III
2007-04-29 8:13 ` Willy Tarreau
2007-04-29 8:58 ` William Lee Irwin III
2007-04-29 8:11 ` Mike Galbraith
2007-04-29 10:30 ` Thomas Gleixner
2007-04-29 10:33 ` William Lee Irwin III
2007-04-29 10:48 ` Kasper Sandberg
2007-04-29 11:25 ` Thomas Gleixner
2007-04-29 10:53 ` Con Kolivas
2007-04-29 11:11 ` Bill Huey
2007-04-29 11:50 ` Thomas Gleixner
2007-04-29 11:11 ` Willy Tarreau
2007-04-29 11:46 ` Con Kolivas
2007-04-29 12:09 ` Paolo Ciarrocchi
2007-04-29 15:39 ` Gene Heskett
2007-04-29 11:59 ` Thomas Gleixner
2007-04-29 12:25 ` Willy Tarreau
2007-04-29 12:00 ` Kasper Sandberg
2007-04-29 12:13 ` Thomas Gleixner
2007-04-29 12:21 ` Kasper Sandberg
2007-04-29 12:55 ` William Lee Irwin III
2007-04-29 13:37 ` Thomas Gleixner
2007-05-01 7:55 ` Nick Piggin
2007-05-01 13:00 ` William Lee Irwin III
2007-04-29 20:30 ` Mark Lord
2007-04-29 15:28 ` Gene Heskett
2007-04-29 7:59 ` Kasper Sandberg
2007-04-29 8:05 ` Ingo Molnar
2007-04-29 15:42 ` Ray Lee
2007-04-29 17:09 ` Kasper Sandberg
2007-04-29 6:47 ` Ingo Molnar
[not found] ` <20070429170908.GA31417@elte.hu>
[not found] ` <20070429173902.GA4349@elte.hu>
2007-04-30 17:45 ` 3d smoothness (was: Re: [patch] CFS scheduler, -v6) Kasper Sandberg
2007-04-30 20:17 ` Ingo Molnar
2007-04-30 20:44 ` Kasper Sandberg
2007-04-27 12:52 ` [patch] CFS scheduler, -v6 William Lee Irwin III
2007-04-27 13:02 ` Ingo Molnar
2007-04-27 21:16 ` Lee Revell
2007-04-26 22:48 ` Con Kolivas
2007-04-27 0:39 ` Gene Heskett
2007-04-27 0:57 ` Con Kolivas
2007-04-27 1:03 ` Gene Heskett
2007-04-27 20:54 ` Bill Davidsen
2007-04-26 16:05 ` Mike Galbraith
2007-04-26 19:27 ` Thomas Gleixner
2007-04-26 19:35 ` Ingo Molnar
2007-04-26 19:42 ` Thomas Gleixner
2007-04-26 20:11 ` Ingo Molnar
2007-04-27 13:19 ` Mark Lord
2007-04-27 13:22 ` Mark Lord
2007-04-27 13:45 ` Ingo Molnar
2007-04-28 12:45 ` Srivatsa Vaddagiri
2007-04-28 13:53 ` Ingo Molnar
2007-04-28 15:23 ` Srivatsa Vaddagiri
2007-04-28 15:22 ` Ingo Molnar
2007-04-28 15:28 ` Srivatsa Vaddagiri
2007-04-27 21:59 Art Haas
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