Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751574AbYJaLLX (ORCPT ); Fri, 31 Oct 2008 07:11:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750822AbYJaLLJ (ORCPT ); Fri, 31 Oct 2008 07:11:09 -0400 Received: from gw1.cosmosbay.com ([86.65.150.130]:49028 "EHLO gw1.cosmosbay.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750790AbYJaLLI convert rfc822-to-8bit (ORCPT ); Fri, 31 Oct 2008 07:11:08 -0400 Message-ID: <490AE792.60200@cosmosbay.com> Date: Fri, 31 Oct 2008 12:10:10 +0100 From: Eric Dumazet User-Agent: Thunderbird 2.0.0.17 (Windows/20080914) MIME-Version: 1.0 To: =?ISO-8859-1?Q?Ilpo_J=E4rvinen?= CC: David Miller , shemminger@vyatta.com, zbr@ioremap.net, rjw@sisk.pl, mingo@elte.hu, s0mbre@tservice.net.ru, a.p.zijlstra@chello.nl, LKML , Netdev , efault@gmx.de, Andrew Morton Subject: Re: [tbench regression fixes]: digging out smelly deadmen. References: <20081031.005219.141937694.davem@davemloft.net> <20081031.025159.51432990.davem@davemloft.net> <490AE1CD.9040207@cosmosbay.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8BIT X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-1.6 (gw1.cosmosbay.com [0.0.0.0]); Fri, 31 Oct 2008 12:10:15 +0100 (CET) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1233 Lines: 34 Ilpo J?rvinen a ?crit : > On Fri, 31 Oct 2008, Eric Dumazet wrote: > >> David Miller a ?crit : >> > From: "Ilpo J?rvinen" >> > Date: Fri, 31 Oct 2008 11:40:16 +0200 (EET) >> > > > Let me remind that it is just a single process, so no ping-pong >> & other >> > > lock related cache effects should play any significant role here, >> no? (I'm >> > > no expert though :-)). >> > > Not locks or ping-pongs perhaps, I guess. So it just sends and >> > receives over a socket, implementing both ends of the communication >> > in the same process? >> > > If hash chain conflicts do happen for those 2 sockets, just >> traversing >> > the chain 2 entries deep could show up. >> >> tbench is very sensible to cache line ping-pongs (on SMP machines of >> course) > > ...Sorry to disappoint you but we were discussion there on my AIM9 > tcp_test results :-). > Well, before you added AIM9 on this topic, we were focusing on tbench :) Sorry to disappoint you :) -- 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/