From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Subject: Re: TCP connection stops after high load. Date: Thu, 12 Apr 2007 14:36:34 -0700 Message-ID: <461EA662.5090801@candelatech.com> References: <461D2DEA.4010806@candelatech.com> <461D447C.4070408@candelatech.com> <20070411.134804.50594117.davem@davemloft.net> <461D4DD7.7020207@candelatech.com> <461E7377.3020708@candelatech.com> <20070412201940.7f570b6d.dada1@cosmosbay.com> <461E8496.2050003@candelatech.com> <461E998A.8080409@cosmosbay.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Andi Kleen , netdev@vger.kernel.org, bcrl@kvack.org To: Eric Dumazet Return-path: Received: from ns2.lanforge.com ([66.165.47.211]:58277 "EHLO ns2.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751932AbXDLVhI (ORCPT ); Thu, 12 Apr 2007 17:37:08 -0400 In-Reply-To: <461E998A.8080409@cosmosbay.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Eric Dumazet wrote: > Hum, could you try to bind nic irqs on separate cpus ? I just started a run on 2.6.20.4, and so far (~20 minutes), it is behaving perfect..running at around 925Mbps in both directions. CWND averages about 600, bouncing from a low of 300 up to 800, but that could very well be perfectly normal. I'm quite pleased with the faster performance in this kernel as well...seems like the old one would rarely get above 800Mbps even when it was passing traffic! I am not sure if the problem is fixed or just harder to hit, but for now it looks good. I'm going to also try a 2.6.19 kernel and see if the problem hits there in an attempt to figure out what patch changed the behaviour. Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com