From: Nick Piggin <piggin@cyberone.com.au>
To: Emmanuel Fleury <fleury@cs.auc.dk>
Cc: Linux Kernel Mailing-list <linux-kernel@vger.kernel.org>
Subject: Re: Scheduler Problem ????
Date: Thu, 18 Mar 2004 10:00:48 +1100 [thread overview]
Message-ID: <4058D8A0.7020507@cyberone.com.au> (raw)
In-Reply-To: <1079533212.25474.370.camel@rade7.s.cs.auc.dk>
Emmanuel Fleury wrote:
>Hi all,
>
>I am running a 2.6.4 (with preemptible kernel activated).
>What I did is the following:
>
>1) Compile the sched_test.c program (at the end of the mail):
>
>[root@hermes sched]$ gcc -o sched_test sched_test.c
>
>2) Set the priority of the root shell as the highest:
>[root@hermes sched]$ ps
> PID TTY TIME CMD
> 1519 pts/0 00:00:00 bash
> 2020 pts/0 00:00:00 ps
>[root@hermes sched]$ chrt -f -p 99 1519
>
>3) Run sched_test:
>[root@hermes sched]$ chrt -f 10 ./sched_test 100
>bye now.
>
>
>
>Here during the execution of sched_test everything is frozen.
>
>
>Did I do something wrong ????
>
>
Realtime processes aren't preemptible at all by non realtime
processes or realtime processes of a lesser priority.
prev parent reply other threads:[~2004-03-17 23:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-17 14:20 Emmanuel Fleury
2004-03-17 23:00 ` Nick Piggin [this message]
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