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From: "Karthik Singaram Lakshmanan" <karthiksingaram@gmail.com>
To: linux-rt-users@vger.kernel.org
Subject: Question regarding sched_setaffinity
Date: Sun, 31 Aug 2008 23:12:55 -0400	[thread overview]
Message-ID: <1ca41c0f0808312012v4c52576cw307929992781eeca@mail.gmail.com> (raw)

Hi,
 I am a noob to SMP real-time scheduling in linux, I have a question of
sched_setaffinity(). If I restrict an application to a single CPU
using the appropriate cpumask for sched_setaffinity(), Is it
guaranteed that the kernel will never schedule it on any other CPU? I
am asking this because looking at kernel/sched.c seems to use
cpu_clear during load balancing. I am interested in knowing whether the
cache will be invalidated when my task is assigned to a single CPU.
Are there exceptions where the cpu-mask will be overridden?
Thanks for taking the time to answer my query.

Thanks,
Karthik

             reply	other threads:[~2008-09-01  3:12 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-01  3:12 Karthik Singaram Lakshmanan [this message]
2008-09-05 19:24 ` Question regarding sched_setaffinity Steven Rostedt
2008-09-05 20:04   ` Mark Hounschell
2008-09-05 20:28     ` Steven Rostedt
2008-09-05 20:45     ` Steven Rostedt
2008-09-08 12:28       ` Mark Hounschell
2008-09-08 14:40         ` Karthik Singaram Lakshmanan

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