From: Ingo Molnar <mingo@elte.hu>
To: Scott Wood <scott@timesys.com>
Cc: Lee Revell <rlrevell@joe-job.com>, Andrew Morton <akpm@osdl.org>,
linux-audio-dev@music.columbia.edu, arjanv@redhat.com,
linux-kernel <linux-kernel@vger.kernel.org>,
"La Monte H.P. Yarroll" <piggy@timesys.com>
Subject: Re: [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch
Date: Wed, 21 Jul 2004 22:40:36 +0200 [thread overview]
Message-ID: <20040721204036.GA29962@elte.hu> (raw)
In-Reply-To: <20040721183213.GB2206@yoda.timesys>
* Scott Wood <scott@timesys.com> wrote:
> On Wed, Jul 21, 2004 at 10:52:46AM +0200, Ingo Molnar wrote:
> > this, if enabled, causes all softirqs to be processed within ksoftirqd,
> > and it also breaks out of the softirq loop if preemption of ksoftirqd
> > has been triggered by a higher-prio task.
>
> You'll still have the latency of finishing the currently executing
> softirq, which often includes a loop itself (whose break condition is
> based on not hogging the CPU, rather than letting higher priority
> tasks in as soon as possible).
well, i share your desire for lower latencies but this is what the
semantics of softirqs require.
but it's really easy to break out of softirq processing early and
restart it later. All it needs in net_rx_action() is to:
if (softirq_defer && need_resched())
goto softnet_break;
since the network softirq code is already latency-aware. The same
'lock-break'-alike methods can be used for other softirq code too.
Ingo
next prev parent reply other threads:[~2004-07-21 21:37 UTC|newest]
Thread overview: 271+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-09 18:26 [announce] [patch] Voluntary Kernel Preemption Patch Ingo Molnar
2004-07-09 19:51 ` Christoph Hellwig
2004-07-09 23:50 ` Andrea Arcangeli
2004-07-10 0:52 ` Andrea Arcangeli
2004-07-10 1:02 ` Dave Jones
2004-07-12 10:17 ` Takashi Iwai
2004-07-12 19:36 ` Andrea Arcangeli
2004-07-13 7:43 ` Takashi Iwai
2004-07-10 6:32 ` Arjan van de Ven
2004-07-10 7:57 ` Ingo Molnar
2004-07-10 8:10 ` ismail dönmez
2004-07-10 8:28 ` Ingo Molnar
2004-07-19 10:36 ` [patch] voluntary-preempt 2.6.8-rc2-H4 Ingo Molnar
2004-07-20 1:38 ` Ramón Rey Vicente
2004-07-20 6:02 ` Ingo Molnar
2004-07-10 15:36 ` [announce] [patch] Voluntary Kernel Preemption Patch Andrea Arcangeli
2004-07-10 12:48 ` Ingo Molnar
2004-07-10 15:12 ` Con Kolivas
2004-07-10 15:14 ` Arjan van de Ven
2004-07-10 15:18 ` Con Kolivas
2004-07-11 7:07 ` Zwane Mwaikambo
2004-07-11 7:09 ` Con Kolivas
2004-07-11 7:16 ` [announce] [patch] " Zwane Mwaikambo
2004-07-11 9:18 ` Ingo Molnar
2004-07-11 9:29 ` Con Kolivas
2004-07-10 16:18 ` [announce] [patch] " Con Kolivas
2004-07-11 6:47 ` [ck] " Ingo Molnar
2004-07-11 6:59 ` Con Kolivas
2004-07-11 11:18 ` R. J. Wysocki
2004-07-11 7:09 ` [ck] Re: [announce] [patch] " Zwane Mwaikambo
2004-07-11 14:27 ` Con Kolivas
2004-07-11 14:29 ` Con Kolivas
2004-07-11 14:38 ` Ingo Molnar
2004-07-11 17:29 ` André Goddard Rosa
2004-07-11 17:49 ` Grzegorz Kulewski
2004-07-11 21:20 ` Con Kolivas
2004-07-11 21:25 ` Grzegorz Kulewski
2004-07-11 20:17 ` Ingo Molnar
2004-07-12 8:23 ` Voluntary Preemption + concurent games Aivils
2004-07-12 9:51 ` Con Kolivas
2004-07-12 10:45 ` Lenar Lõhmus
2004-07-12 11:52 ` Aivils
2004-07-12 13:35 ` Nick Piggin
2004-07-12 14:15 ` [ck] Re: [announce] [patch] Voluntary Kernel Preemption Patch Chris Friesen
2004-07-12 14:19 ` Ingo Molnar
2004-07-10 15:58 ` Andrea Arcangeli
2004-07-09 21:13 ` Redeeman
2004-07-10 8:02 ` Ingo Molnar
2004-07-10 8:50 ` Ingo Molnar
2004-07-10 10:55 ` ismail dönmez
2004-07-10 11:26 ` Arjan van de Ven
2004-07-10 12:01 ` ismail dönmez
2004-07-10 12:05 ` Arjan van de Ven
2004-07-10 12:09 ` Nick Piggin
2004-07-10 12:35 ` Ingo Molnar
2004-07-10 12:58 ` ismail dönmez
2004-07-10 13:55 ` Ingo Molnar
2004-07-10 14:45 ` Nick Piggin
2004-07-10 14:57 ` ismail dönmez
2004-07-12 10:48 ` Takashi Iwai
2004-07-12 13:09 ` ismail dönmez
2004-07-12 13:14 ` Takashi Iwai
2004-07-09 21:36 ` Torrey Hoffman
2004-07-10 8:23 ` Ingo Molnar
2004-07-10 1:00 ` Con Kolivas
2004-07-10 1:04 ` Dave Jones
2004-07-10 12:55 ` Ingo Molnar
2004-07-11 5:25 ` Andrew Morton
2004-07-11 9:32 ` Ingo Molnar
2004-07-11 9:45 ` Andrew Morton
2004-07-11 9:50 ` Ingo Molnar
2004-07-11 9:58 ` Andrew Morton
2004-07-11 10:30 ` Ingo Molnar
2004-07-11 10:42 ` Andrew Morton
2004-07-11 10:59 ` Arjan van de Ven
2004-07-11 11:13 ` Andrew Morton
2004-07-11 18:07 ` Mikulas Patocka
2004-07-12 7:08 ` Zwane Mwaikambo
2004-07-19 10:20 ` Ingo Molnar
2004-07-11 23:12 ` Robert Love
2004-07-12 22:40 ` Bill Davidsen
2004-07-12 13:24 ` John Stoffel
2004-07-12 22:56 ` [linux-audio-dev] " Lee Revell
2004-07-12 23:31 ` Andrew Morton
2004-07-12 23:58 ` Paul Davis
2004-07-13 0:06 ` Andrew Morton
2004-07-13 0:21 ` Con Kolivas
2004-07-13 1:01 ` [linux-audio-dev] Re: [announce] [patch] " Lee Revell
2004-07-13 7:49 ` Takashi Iwai
2004-07-13 8:12 ` Lee Revell
2004-07-13 0:01 ` Paul Davis
2004-07-13 0:08 ` Andrew Morton
2004-07-13 16:25 ` Andrea Arcangeli
2004-07-13 18:42 ` Lee Revell
2004-07-13 21:29 ` Andrew Morton
2004-07-13 21:45 ` Lee Revell
2004-07-14 8:51 ` Takashi Iwai
2004-07-14 9:36 ` Lee Revell
2004-07-14 10:48 ` Takashi Iwai
2004-07-14 14:52 ` Lee Revell
2004-07-14 16:29 ` Lee Revell
2004-07-14 10:26 ` Benno Senoner
2004-07-13 18:48 ` Andrew Morton
2004-07-13 21:38 ` Andrea Arcangeli
2004-07-13 21:54 ` Andrew Morton
2004-07-13 22:01 ` Andrea Arcangeli
2004-07-13 22:25 ` Andrew Morton
2004-07-13 22:37 ` Andrea Arcangeli
2004-07-13 22:44 ` Andrew Morton
2004-07-13 22:53 ` Andrea Arcangeli
2004-07-13 23:06 ` Andrew Morton
2004-07-13 23:18 ` Andrea Arcangeli
2004-07-13 23:32 ` Andrew Morton
2004-07-14 0:40 ` Andrea Arcangeli
2004-07-14 0:45 ` Andrew Morton
2004-07-19 11:59 ` Ingo Molnar
2004-09-02 22:03 ` Andrea Arcangeli
2004-09-02 22:20 ` Andrew Morton
2004-09-02 23:03 ` Ingo Molnar
2004-09-02 23:21 ` Ingo Molnar
2004-07-13 7:58 ` Takashi Iwai
2004-07-13 0:17 ` Lee Revell
2004-07-13 0:46 ` Andrew Morton
2004-07-13 2:52 ` Lee Revell
2004-07-13 3:59 ` Andrew Morton
2004-07-13 7:57 ` Lee Revell
2004-07-19 10:48 ` Ingo Molnar
2004-07-19 11:34 ` Ingo Molnar
2004-07-20 5:38 ` Lee Revell
2004-07-20 6:12 ` Ingo Molnar
2004-07-20 6:59 ` Lee Revell
2004-07-20 7:11 ` Ingo Molnar
[not found] ` <200407202011.20558.musical_snake@gmx.de>
2004-07-20 19:56 ` Lee Revell
2004-07-20 23:49 ` Benno Senoner
2004-07-21 0:32 ` [linux-audio-dev] " Lee Revell
2004-07-21 1:25 ` Timothy Miller
2004-07-21 21:38 ` Another dumb question about " Timothy Miller
2004-07-24 0:25 ` Lee Revell
2004-07-25 20:19 ` Timothy Miller
2004-07-25 20:13 ` Lee Revell
2004-07-21 10:53 ` [linux-audio-dev] Re: [announce] [patch] " Florian Schmidt
2004-07-21 11:18 ` Thomas Charbonnel
2004-07-21 12:04 ` pci gfx card / jack xruns / pci latencies (was: Re: [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch) Florian Schmidt
2004-07-21 17:49 ` [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch Fernando Pablo Lopez-Lezcano
2004-07-22 22:25 ` Andrew McGregor
2004-07-22 23:16 ` Florian Schmidt
2004-07-21 14:27 ` Benno Senoner
2004-07-20 12:19 ` Jens Axboe
2004-07-20 21:32 ` Lee Revell
2004-07-24 4:07 ` Lee Revell
2004-07-24 5:46 ` Lee Revell
2004-07-24 6:33 ` Lee Revell
2004-07-24 6:43 ` Ingo Molnar
2004-07-24 22:49 ` Lee Revell
2004-07-24 23:30 ` Lee Revell
2004-07-24 11:27 ` max request size 1024KiB by default? Rudo Thomas
2004-07-24 22:58 ` Lee Revell
2004-07-26 19:29 ` Johannes Stezenbach
2004-07-27 5:15 ` Jens Axboe
2004-07-24 12:41 ` [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch Mark Lord
2004-07-24 4:58 ` Lee Revell
2004-07-13 8:31 ` Lee Revell
2004-07-13 8:43 ` Andrew Morton
2004-07-13 8:53 ` Lee Revell
2004-07-13 9:00 ` Andrew Morton
2004-07-13 9:21 ` Takashi Iwai
2004-07-13 9:25 ` Andrew Morton
2004-07-13 9:33 ` Takashi Iwai
2004-07-13 9:44 ` Andrew Morton
2004-07-13 9:23 ` Lee Revell
2004-07-13 9:29 ` Andrew Morton
2004-07-13 20:37 ` Lee Revell
2004-07-13 22:32 ` Lee Revell
2004-07-13 8:07 ` Takashi Iwai
2004-07-13 22:40 ` Bill Davidsen
2004-07-13 23:47 ` Randy.Dunlap
2004-07-19 10:29 ` Ingo Molnar
2004-07-21 3:27 ` Lee Revell
2004-07-21 7:03 ` Andrew Morton
2004-07-21 4:58 ` Lee Revell
2004-07-21 5:30 ` Ingo Molnar
2004-07-21 6:03 ` Lee Revell
2004-07-21 8:22 ` Ingo Molnar
2004-07-21 8:52 ` Ingo Molnar
2004-07-21 11:32 ` Nick Piggin
2004-07-21 15:44 ` Ingo Molnar
2004-07-22 4:56 ` Nick Piggin
2004-07-22 7:07 ` Ingo Molnar
2004-07-22 10:54 ` Nick Piggin
2004-07-22 16:23 ` Ingo Molnar
2004-07-22 22:11 ` Nick Piggin
2004-07-23 5:47 ` Ingo Molnar
2004-07-23 6:45 ` Nick Piggin
2004-07-23 6:55 ` Ingo Molnar
2004-07-23 7:11 ` Nick Piggin
2004-07-23 7:21 ` Ingo Molnar
2004-07-23 7:28 ` Nick Piggin
2004-07-21 18:34 ` Scott Wood
2004-07-21 18:46 ` Ingo Molnar
2004-07-21 19:56 ` Scott Wood
2004-07-21 21:08 ` Ingo Molnar
2004-07-22 2:47 ` Scott Wood
2004-07-21 21:45 ` Ingo Molnar
2004-07-22 2:28 ` Scott Wood
2004-07-22 7:40 ` Ingo Molnar
2004-07-22 18:53 ` Scott Wood
2004-07-22 19:45 ` Bill Huey
2004-07-28 6:45 ` Ingo Molnar
2004-07-28 20:52 ` Scott Wood
2004-07-29 18:21 ` Ingo Molnar
2004-07-29 18:36 ` Bill Huey
2004-07-29 19:17 ` Scott Wood
2004-07-29 19:25 ` Bill Huey
2004-07-30 2:23 ` Eric St-Laurent
2004-07-29 20:26 ` Pavel Machek
2004-07-29 20:57 ` Scott Wood
2004-07-29 21:00 ` Pavel Machek
2004-07-29 21:07 ` Ingo Molnar
2004-07-21 22:52 ` Nick Piggin
2004-07-21 18:32 ` Scott Wood
2004-07-21 20:40 ` Ingo Molnar [this message]
2004-07-21 18:30 ` Scott Wood
2004-07-21 18:43 ` Ingo Molnar
2004-07-22 2:32 ` Scott Wood
2004-07-22 9:51 ` Ingo Molnar
2004-07-22 18:36 ` Scott Wood
2004-07-22 19:11 ` Robert Love
2004-07-21 21:00 ` Scott Wood
2004-07-21 21:18 ` Ingo Molnar
2004-07-21 22:14 ` Bill Huey
2004-07-21 22:31 ` Bill Huey
2004-07-21 22:37 ` Scott Wood
2004-07-22 10:06 ` [patch] voluntary-preempt-2.6.8-rc2-H9 Ingo Molnar
2004-07-22 16:00 ` scheduling while atomic (Re: voluntary-preempt-2.6.8-rc2-H9) Rudo Thomas
2004-07-22 16:19 ` Ingo Molnar
2004-07-22 17:24 ` voluntary-preempt I0: sluggish feel Rudo Thomas
2004-07-22 17:52 ` Matt Heler
2004-07-22 17:54 ` Rudo Thomas
2004-07-22 18:01 ` Ingo Molnar
2004-07-22 18:08 ` Ingo Molnar
2004-07-22 18:14 ` Ingo Molnar
2004-07-22 18:37 ` Rudo Thomas
2004-07-23 10:42 ` [patch] voluntary-preempt-2.6.8-rc2-I3 Ingo Molnar
2004-07-23 10:58 ` Paolo Ciarrocchi
2004-07-23 11:04 ` Ingo Molnar
2004-07-23 11:28 ` [patch] voluntary-preempt-2.6.8-rc2-I4 Ingo Molnar
2004-07-24 0:16 ` Lee Revell
2004-07-23 11:42 ` [patch] voluntary-preempt-2.6.8-rc2-I3 Paolo Ciarrocchi
2004-07-23 12:00 ` Ingo Molnar
2004-07-23 15:36 ` Dang, Linh [CAR:2X23:EXCH]
2004-07-23 23:48 ` Thomas Charbonnel
2004-07-26 11:10 ` Ingo Molnar
2004-07-26 12:27 ` Thomas Charbonnel
2004-07-22 18:31 ` voluntary-preempt I0: sluggish feel Robert Love
2004-07-22 18:32 ` Rudo Thomas
2004-07-22 18:38 ` Ingo Molnar
2004-07-22 18:00 ` Ingo Molnar
2004-07-21 6:07 ` [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch Lee Revell
2004-07-21 10:14 ` Roger Luethi
2004-07-13 0:58 ` Jan Depner
2004-07-13 1:00 ` Andrew Morton
2004-07-13 3:31 ` Florin Andrei
2004-07-13 6:31 ` Paul Winkler
2004-07-13 13:26 ` Benno Senoner
2004-07-13 14:50 ` Paul Davis
2004-07-13 19:45 ` Lee Revell
2004-07-13 22:17 ` Bill Davidsen
2004-07-16 4:50 ` Florin Andrei
2004-07-16 12:49 ` Takashi Iwai
2004-07-13 21:53 ` Timothy Miller
-- strict thread matches above, loose matches on Subject: below --
2004-07-13 15:16 [linux-audio-dev] " Shane Shrybman
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