From: Thomas Charbonnel <thomas@undata.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Lee Revell <rlrevell@joe-job.com>,
Daniel Schmitt <pnambic@unu.nu>, "K.R. Foley" <kr@cybsft.com>,
Felipe Alfaro Solana <lkml@felipe-alfaro.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Mark_H_Johnson@raytheon.com
Subject: Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-Q5
Date: Tue, 31 Aug 2004 21:45:08 +0200 [thread overview]
Message-ID: <1093981507.8005.20.camel@localhost> (raw)
In-Reply-To: <20040831193029.GA29912@elte.hu>
Ingo Molnar wrote :
> * Thomas Charbonnel <thomas@undata.org> wrote:
>
> > As you can see ~1ms was probably an accident, and the latency does not
> > always come from do_timer. The constant is do_IRQ interrupting the
> > idle thread.
>
> (do you have any sort of powersaving mode (ACPI/APM) enabled? If yes,
> could you try to tune it down as much as possible - disable any
> powersaving option in the BIOS and in the .config - kill apmd, etc.)
>
> but i dont think it's powersaving - why would such an overhead show up
> in those functions. The only common thing seems to be that both
> mark_offset_tsc() and mask_and_ack_8259A() does port IO, which is slow -
> but still it shouldnt take ~0.5 msecs!
>
> Ingo
Indeed, I just checked and my xrun every ~8 seconds problem is back. I
have acpi compiled in but acpi=off, but it doesn't seem to be honoured
(it was with 2.6.8.1, IIRC).
Thomas
next prev parent reply other threads:[~2004-08-31 19:46 UTC|newest]
Thread overview: 122+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-23 22:18 [patch] PPC/PPC64 port of voluntary preempt patch Scott Wood
2004-08-24 6:14 ` [patch] voluntary-preempt-2.6.8.1-P9 Ingo Molnar
2004-08-24 17:43 ` K.R. Foley
2004-08-24 20:32 ` Lee Revell
2004-08-24 20:53 ` Scott Wood
2004-08-24 19:20 ` K.R. Foley
2004-08-24 22:47 ` Lee Revell
2004-08-25 2:00 ` Lee Revell
2004-08-25 3:17 ` K.R. Foley
2004-08-25 3:22 ` Lee Revell
2004-08-25 14:34 ` K.R. Foley
2004-08-25 16:00 ` K.R. Foley
2004-08-25 3:26 ` K.R. Foley
2004-08-25 9:58 ` [patch] voluntary-preempt-2.6.8.1-P9 : oprofile latency at 3.3ms P.O. Gaillard
2004-08-26 21:39 ` [patch] voluntary-preempt-2.6.8.1-P9 Lee Revell
2004-08-27 16:54 ` Lee Revell
2004-08-28 7:37 ` Ingo Molnar
2004-08-28 15:10 ` Lee Revell
2004-08-28 12:14 ` Ingo Molnar
2004-08-30 9:27 ` voluntary-preempt-2.6.8.1-P9 : big latency when logging on console P.O. Gaillard
2004-08-30 9:41 ` Ingo Molnar
2004-08-30 12:25 ` P.O. Gaillard
2004-08-30 9:48 ` [patch] voluntary-preempt-2.6.8.1-P9 : a few submillisecond latencies P.O. Gaillard
2004-08-28 12:03 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q0 Ingo Molnar
2004-08-28 16:18 ` Felipe Alfaro Solana
2004-08-28 16:50 ` K.R. Foley
2004-08-28 17:52 ` Lee Revell
2004-08-28 19:44 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q2 Ingo Molnar
2004-08-28 20:01 ` Lee Revell
2004-08-28 20:04 ` Ingo Molnar
2004-08-28 20:08 ` Lee Revell
2004-08-28 20:10 ` Daniel Schmitt
2004-08-28 20:31 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q3 Ingo Molnar
2004-08-28 21:10 ` Lee Revell
2004-08-28 21:13 ` Ingo Molnar
2004-08-28 21:16 ` Lee Revell
2004-08-28 23:51 ` Lee Revell
2004-08-29 2:35 ` Lee Revell
2004-08-29 5:43 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q4 Ingo Molnar
2004-08-29 6:57 ` Lee Revell
2004-08-29 18:01 ` Ingo Molnar
2004-08-29 19:06 ` Ingo Molnar
2004-08-30 0:47 ` K.R. Foley
2004-08-30 3:42 ` K.R. Foley
2004-08-30 13:06 ` Alan Cox
2004-08-30 17:37 ` Ingo Molnar
2004-08-31 16:39 ` K.R. Foley
2004-08-30 9:06 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q5 Ingo Molnar
2004-08-30 14:25 ` Thomas Charbonnel
2004-08-30 18:00 ` Ingo Molnar
2004-08-31 19:23 ` Thomas Charbonnel
2004-08-31 19:30 ` Ingo Molnar
2004-08-31 19:45 ` Thomas Charbonnel [this message]
2004-08-31 6:40 ` Lee Revell
2004-08-31 6:53 ` Ingo Molnar
2004-08-31 23:03 ` Lee Revell
2004-09-01 15:52 ` Martin Josefsson
2004-09-01 21:15 ` Lee Revell
2004-09-01 21:30 ` Lee Revell
2004-08-31 7:06 ` Ingo Molnar
2004-08-31 19:21 ` Lee Revell
2004-08-31 19:37 ` Ingo Molnar
2004-08-31 19:47 ` Lee Revell
2004-08-31 19:51 ` Ingo Molnar
2004-08-31 20:09 ` Ingo Molnar
2004-08-31 20:10 ` Lee Revell
2004-08-31 20:14 ` Ingo Molnar
2004-08-31 20:20 ` Ingo Molnar
2004-08-31 20:34 ` Lee Revell
2004-08-31 20:39 ` Ingo Molnar
2004-08-31 20:41 ` Lee Revell
2004-08-31 17:40 ` Peter Zijlstra
2004-09-01 1:43 ` Lee Revell
2004-09-01 2:30 ` Lee Revell
2004-09-01 7:27 ` Lee Revell
2004-09-01 8:29 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q6 Ingo Molnar
2004-09-01 13:51 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q7 Ingo Molnar
2004-09-01 17:09 ` Thomas Charbonnel
2004-09-01 19:03 ` K.R. Foley
2004-09-01 20:11 ` Peter Zijlstra
2004-09-01 20:16 ` Lee Revell
2004-09-01 20:53 ` K.R. Foley
[not found] ` <41367E5D.3040605@cybsft.com>
2004-09-02 5:37 ` Ingo Molnar
2004-09-02 5:40 ` Ingo Molnar
2004-08-30 12:52 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q3 Ingo Molnar
2004-08-29 7:40 ` Matt Heler
2004-08-24 19:51 ` [patch] PPC/PPC64 port of voluntary preempt patch Scott Wood
2004-08-26 3:17 ` Lee Revell
2004-08-26 16:38 ` Scott Wood
2004-08-27 1:18 ` Fernando Pablo Lopez-Lezcano
2004-08-28 12:36 ` Ingo Molnar
2004-08-28 13:01 ` [patch] voluntary-preempt-2.6.9-rc1-bk4-Q1 Ingo Molnar
2004-08-30 1:06 ` Fernando Pablo Lopez-Lezcano
-- strict thread matches above, loose matches on Subject: below --
2004-08-30 19:13 [patch] voluntary-preempt-2.6.9-rc1-bk4-Q5 Mark_H_Johnson
2004-08-30 19:21 ` Ingo Molnar
2004-08-31 8:49 ` Ingo Molnar
2004-09-02 6:33 ` Ingo Molnar
2004-08-30 22:04 Mark_H_Johnson
2004-08-31 6:31 ` Ingo Molnar
2004-09-01 7:30 ` Ingo Molnar
2004-08-31 12:46 Mark_H_Johnson
2004-08-31 15:17 Mark_H_Johnson
2004-08-31 17:20 ` Lee Revell
2004-08-31 18:09 ` Lee Revell
2004-08-31 18:53 ` Takashi Iwai
2004-08-31 18:56 ` Ingo Molnar
2004-09-02 16:59 ` Jaroslav Kysela
2004-09-02 17:50 ` Lee Revell
2004-08-31 18:19 ` Takashi Iwai
2004-08-31 18:48 ` Ingo Molnar
2004-08-31 19:02 ` Takashi Iwai
2004-08-31 18:50 ` Ingo Molnar
2004-08-31 20:10 Mark_H_Johnson
2004-08-31 20:37 ` Ingo Molnar
[not found] <2yiVZ-IZ-15@gated-at.bofh.it>
[not found] ` <2ylhi-2hg-3@gated-at.bofh.it>
[not found] ` <2ynLU-42D-7@gated-at.bofh.it>
[not found] ` <2yqJJ-5ZL-1@gated-at.bofh.it>
[not found] ` <2yQkS-6Zh-13@gated-at.bofh.it>
[not found] ` <2zaCV-4FE-3@gated-at.bofh.it>
[not found] ` <2zaWk-4Yj-9@gated-at.bofh.it>
[not found] ` <2zmE8-4Zz-11@gated-at.bofh.it>
[not found] ` <2zngP-5wD-9@gated-at.bofh.it>
[not found] ` <2zngP-5wD-7@gated-at.bofh.it>
[not found] ` <2znJS-5Pm-25@gated-at.bofh.it>
2004-08-31 23:06 ` Andi Kleen
[not found] ` <2znJS-5Pm-27@gated-at.bofh.it>
[not found] ` <2znJS-5Pm-29@gated-at.bofh.it>
[not found] ` <2znJS-5Pm-31@gated-at.bofh.it>
[not found] ` <2znJS-5Pm-33@gated-at.bofh.it>
2004-08-31 23:10 ` Andi Kleen
2004-09-01 7:05 ` Ingo Molnar
2004-09-01 14:37 Mark_H_Johnson
2004-09-01 19:31 ` Takashi Iwai
2004-09-01 15:21 Mark_H_Johnson
2004-09-02 22:24 ` Ingo Molnar
[not found] <OFD220F58F.002C5901-ON86256F02.005C2FB1-86256F02.005C2FD5@raytheon.com>
2004-09-01 17:09 ` Ingo Molnar
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