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Date: Mon, 02 Feb 2009 08:43:55 +0100
From: Thomas Pilarski <thomas.pi@...or.de>
To: Mike Galbraith <efault@....de>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Andrew Morton <akpm@...ux-foundation.org>,
Gregory Haskins <ghaskins@...ell.com>,
bugme-daemon@...zilla.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [Bugme-new] [Bug 12562] New: High overhead while switching or
synchronizing threads on different cores
Am Freitag, den 30.01.2009, 08:57 +0100 schrieb Mike Galbraith:
> One of those "don't _ever_ do that" things?
I did not known random() uses a system call. It's rather unrealistic to
have five million system calls in a second. By adding a small loop with
some calculations near the random, the problem disappears too.
It is a unlucky chosen data generator.
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