From: Ulrich Drepper <drepper@redhat.com>
To: Paul Davis <paul@linuxaudiosystems.com>
Cc: Ingo Molnar <mingo@elte.hu>, linux-kernel@vger.kernel.org
Subject: Re: 2.6.X, NPTL, SCHED_FIFO and JACK
Date: Wed, 30 Jun 2004 10:07:08 -0700 [thread overview]
Message-ID: <40E2F33C.90106@redhat.com> (raw)
In-Reply-To: <200406301612.i5UGCdiw010913@localhost.localdomain>
Paul Davis wrote:
> this has me thinking. one of the major changes with NPTL is that all
> threads share the same PID. so how in the world do we ever set the
> scheduling policy of a single thread (as opposed to something
> identified by a pid_t) to SCHED_FIFO?
If you have to ask this question than it's no wonder you get erratic
behavior. It means you haven't looked at the pthread interface at all.
Define a pthread_attr_t with the appropriate setting (with
pthread_attr_setschedparam etc) and create the thread (and use
pthread_attr_setinheritsched correctly). Alternatively use
pthread_setschedparam on already running threads.
And use a recent enough nptl version. Very early versions didn't have
any of the scheduler handling implemented.
--
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
next prev parent reply other threads:[~2004-06-30 17:20 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-30 13:41 2.6.X, NPTL, SCHED_FIFO and JACK Paul Davis
2004-06-30 15:04 ` Ingo Molnar
2004-06-30 15:18 ` Ingo Molnar
2004-06-30 15:26 ` Jakub Jelinek
2004-06-30 16:32 ` Paul Davis
2004-06-30 16:57 ` Jakub Jelinek
2004-06-30 17:52 ` Paul Davis
2004-06-30 15:05 ` Ingo Molnar
2004-06-30 16:12 ` Paul Davis
2004-06-30 17:07 ` Ulrich Drepper [this message]
2004-06-30 17:50 ` Paul Davis
2004-07-01 18:03 ` Matt Mackall
2004-07-01 18:14 ` William Lee Irwin III
2004-07-01 22:45 ` Andrew Morton
2004-07-02 0:45 ` William Lee Irwin III
2004-07-02 1:38 ` Peter Williams
2004-07-02 2:53 ` William Lee Irwin III
2004-07-02 3:03 ` Con Kolivas
2004-07-02 3:05 ` William Lee Irwin III
2004-07-02 3:27 ` Paul Davis
2004-07-02 7:37 ` William Lee Irwin III
2004-07-02 10:40 ` Takashi Iwai
2004-07-06 0:48 ` Peter Williams
2004-07-02 14:42 ` Paul Davis
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