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From: Yogesh Ahire <yogesh02061983@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: sched_yield() call on Linux Kernel 2.6.39 is not behaving correct
Date: Wed, 7 Jan 2015 16:30:01 -0500	[thread overview]
Message-ID: <CAH86sKKCbZ7CYDEgAnpiVH+7TZNOjziUYOJSWHEpQyY3eUSniA@mail.gmail.com> (raw)

Hi All,

I have a system with multiple CPU cores.  I have multiple threads
assigned to particular CPU. Among these threads the main thread calls
sched_yield() if it has nothing to do, I am hoping that doing so will
give chance to other threads to run. But the strange behavior of
sched_yield() is , even if there are ready-to-runs tasks on this CPU
waiting for their turn, the task which calls sched_yield() is always
running ( get scheduled) and not giving chance to any other task to
run. It is consuming 100% of CPU. Is sched_yield() is broken on 2.6
Kernel?


Thanks
Thanks

             reply	other threads:[~2015-01-07 21:30 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-07 21:30 Yogesh Ahire [this message]
2015-01-08  5:26 ` sched_yield() call on Linux Kernel 2.6.39 is not behaving correct Mike Galbraith
2015-01-08 15:00   ` Yogesh Ahire
2015-01-09  3:14     ` Mike Galbraith
2015-01-09 19:24       ` Yogesh Ahire
2015-01-10  7:37         ` Mike Galbraith

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