linux-kernel - Re: Are Linux pipes slower than the FreeBSD ones ?

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Message-ID: <47CE8E21.2000309@davidnewall.com>
Date:	Wed, 05 Mar 2008 22:42:17 +1030
From:	David Newall <davidn@...idnewall.com>
To:	Eric Dumazet <dada1@...mosbay.com>
CC:	David Miller <davem@...emloft.net>, dmantipov@...dex.ru,
	linux-kernel@...r.kernel.org
Subject: Re: Are Linux pipes slower than the FreeBSD ones ?

Eric Dumazet wrote:
> I tried the 'pipe' prog on a fresh linux-2.6.24.2, on a dual Xeon 5120
> machine, and we can notice that four cpus are used (but only two
> threads are running on this benchmark)

Do the threads migrate from CPU to CPU?  That would be sub-optimal,
wouldn't it?
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