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From: Lee Revell <rlrevell@joe-job.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>,
	Gene Heskett <gene.heskett@verizon.net>,
	LKML <linux-kernel@vger.kernel.org>, "K.R. Foley" <kr@cybsft.com>,
	Rui Nuno Capela <rncbc@rncbc.org>
Subject: Re: [patch] Real-Time Preemption, -RT-2.6.12-rc1-V0.7.43-00
Date: Sat, 02 Apr 2005 18:45:46 -0500	[thread overview]
Message-ID: <1112485548.28826.91.camel@mindpipe> (raw)
In-Reply-To: <20050402203550.GB16230@elte.hu>

[-- Attachment #1: Type: text/plain, Size: 1051 bytes --]

On Sat, 2005-04-02 at 22:35 +0200, Ingo Molnar wrote:
> > For kicks I ran this on 2.6.11-rc2-RT-V0.7.36-02 (I still had it as a 
> > Grub option), and the system just locked up hard.  I just was curious 
> > if this was from a different change. But at least in the latest it 
> > shows output, and not just a hard lockup.
> > 
> > Oh, the bug report was running kernel 2.6.12-rc1-RT-V0.7.43-06.
> 
> ok, so it's not the recent NFS changes.

Here's an interesting trace I got today.  It looks either the emu10k1 or
USB irq handler left IRQ 10 disabled.  This isn't a tracer bug because
you can clearly see this leads to an xrun.  Since I've been hacking the
emu10k1 driver quite a bit, I suspect this is the problem.

This trace also shows that my trigger callback for the emu10k1
multichannel device needs optimizing; it takes 300 usecs to stop all 16
voices, not acceptable for an ALSA irq handler which uses SA_INTERRUPT.
I think I can improve this significantly by reordering the register
settings and eliminating some function call overhead.

Lee

[-- Attachment #2: latency_trace.bz2 --]
[-- Type: application/x-bzip, Size: 2387 bytes --]

  parent reply	other threads:[~2005-04-02 23:46 UTC|newest]

Thread overview: 86+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-03-25 14:59 [patch] Real-Time Preemption, -RT-2.6.12-rc1-V0.7.41-10 Ingo Molnar
2005-03-25 22:33 ` Lee Revell
2005-03-25 22:39   ` Ingo Molnar
2005-03-26  5:14     ` Lee Revell
2005-03-27  8:58       ` Ingo Molnar
2005-03-30  5:16         ` Lee Revell
2005-03-30  6:54           ` Ingo Molnar
2005-03-29 22:31 ` Lee Revell
2005-03-30  8:03   ` Ingo Molnar
2005-03-31  8:55 ` [patch] Real-Time Preemption, -RT-2.6.12-rc1-V0.7.41-25 Ingo Molnar
2005-04-01 10:47   ` [patch] Real-Time Preemption, -RT-2.6.12-rc1-V0.7.43-00 Ingo Molnar
2005-04-01 12:13     ` Rui Nuno Capela
2005-04-01 12:52       ` Ingo Molnar
2005-04-01 14:42         ` Rui Nuno Capela
2005-04-01 15:06           ` Ingo Molnar
2005-04-01 15:52             ` Rui Nuno Capela
2005-04-01 16:28               ` Ingo Molnar
2005-04-01 21:26                 ` Rui Nuno Capela
2005-04-01 17:31     ` Gene Heskett
2005-04-01 18:27       ` K.R. Foley
2005-04-01 18:29         ` Ingo Molnar
2005-04-01 19:21           ` Gene Heskett
2005-04-01 19:19         ` Gene Heskett
2005-04-01 19:22           ` K.R. Foley
2005-04-01 23:34             ` Gene Heskett
2005-04-02  1:45               ` Lee Revell
2005-04-02  2:30                 ` Gene Heskett
2005-04-02  5:12               ` Ingo Molnar
2005-04-02 19:37                 ` Steven Rostedt
2005-04-02 20:06                   ` Steven Rostedt
2005-04-02 20:17                     ` Lee Revell
2005-04-02 20:34                       ` Ingo Molnar
2005-04-02 22:38                         ` Gene Heskett
2005-04-02 20:35                     ` Ingo Molnar
2005-04-02 20:44                       ` Steven Rostedt
2005-04-02 22:09                         ` Steven Rostedt
2005-04-03  0:06                           ` Steven Rostedt
2005-04-04 20:00                             ` Ingo Molnar
2005-04-04 20:40                               ` Steven Rostedt
2005-04-04 20:47                                 ` Ingo Molnar
2005-04-04 21:14                                   ` Steven Rostedt
2005-04-04 22:51                                     ` Zwane Mwaikambo
2005-04-04 22:59                                       ` Steven Rostedt
2005-04-04 23:09                                       ` Esben Nielsen
2005-04-05  7:57                                         ` Zwane Mwaikambo
2005-04-05 15:18                                           ` Mike Galbraith
2005-04-04 23:06                                     ` Esben Nielsen
2005-04-05  5:34                                       ` Ingo Molnar
2005-04-05  9:25                                         ` Esben Nielsen
2005-04-02 23:45                       ` Lee Revell [this message]
2005-04-02 20:10                   ` Lee Revell
2005-04-05  7:19     ` [patch] Real-Time Preemption, -RT-2.6.12-rc2-V0.7.44-00 Ingo Molnar
2005-04-05 19:06       ` Rui Nuno Capela
2005-04-05 19:36         ` Steven Rostedt
2005-04-08 15:22           ` Rui Nuno Capela
2005-04-08 17:15             ` Lee Revell
2005-04-08 20:15               ` K.R. Foley
2005-04-08 20:17                 ` Lee Revell
2005-04-08 20:26                   ` K.R. Foley
2005-04-08 21:00                     ` Lee Revell
2005-04-08 21:36                       ` K.R. Foley
2005-04-10 17:23       ` K.R. Foley
2005-04-10 17:27         ` Ingo Molnar
2005-04-10 17:39           ` Steven Rostedt
2005-04-10 17:47             ` Ingo Molnar
2005-04-12 18:17               ` Lee Revell
2005-04-21  7:35       ` [patch] Real-Time Preemption, -RT-2.6.12-rc3-V0.7.46-00 Ingo Molnar
2005-04-21  8:45         ` Paolo Ciarrocchi
2005-04-21 16:16         ` Daniel Walker
2005-04-21 19:54         ` Daniel Walker
2005-04-22  6:27         ` [patch] Real-Time Preemption, -RT-2.6.12-rc3-V0.7.46-01 Ingo Molnar
2005-04-22  7:34           ` Ingo Molnar
2005-04-22 15:48             ` Daniel Walker
2005-04-22 15:49               ` Ingo Molnar
2005-04-22 15:53                 ` Daniel Walker
2005-04-22 15:55                   ` Ingo Molnar
2005-04-22 15:56                     ` Ingo Molnar
2005-04-26 17:49                     ` Daniel Walker
2005-05-09  7:23                       ` Ingo Molnar
2005-04-22 21:06             ` Inaky Perez-Gonzalez
2005-04-22 21:15               ` Daniel Walker
2005-05-04  8:24                 ` Ingo Molnar
2005-04-22 21:17               ` Daniel Walker
2005-04-30 23:28           ` Lee Revell
2005-05-04  8:22             ` Ingo Molnar
2005-05-04 15:05               ` Lee Revell

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