Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932826AbYCEMM0 (ORCPT ); Wed, 5 Mar 2008 07:12:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762691AbYCEMMR (ORCPT ); Wed, 5 Mar 2008 07:12:17 -0500 Received: from hawking.rebel.net.au ([203.20.69.83]:58316 "EHLO hawking.rebel.net.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758569AbYCEMMQ (ORCPT ); Wed, 5 Mar 2008 07:12:16 -0500 Message-ID: <47CE8E21.2000309@davidnewall.com> Date: Wed, 05 Mar 2008 22:42:17 +1030 From: David Newall User-Agent: Thunderbird 2.0.0.6 (X11/20071022) MIME-Version: 1.0 To: Eric Dumazet CC: David Miller , dmantipov@yandex.ru, linux-kernel@vger.kernel.org Subject: Re: Are Linux pipes slower than the FreeBSD ones ? References: <1389671204703217@webmail34.yandex.ru> <20080305.000014.245410231.davem@davemloft.net> <47CE6C41.3090303@cosmosbay.com> In-Reply-To: <47CE6C41.3090303@cosmosbay.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 528 Lines: 12 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? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/