From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wenji Wu Subject: RE: A Linux TCP SACK Question Date: Wed, 16 Apr 2008 09:50:19 -0500 Message-ID: <000201c89fd1$308edf30$6b5ee183@D2GT6T71> References: <1e41a3230804151540i1f7cee4dva6adc6ef25dae546@mail.gmail.com> <20080416.012732.152357000.davem@davemloft.net> <20080416.023551.70464279.davem@davemloft.net> Reply-To: wenji@fnal.gov Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7BIT Cc: johnwheffner@gmail.com, netdev@vger.kernel.org To: 'David Miller' , ilpo.jarvinen@helsinki.fi Return-path: Received: from mailgw1.fnal.gov ([131.225.111.11]:46368 "EHLO mailgw1.fnal.gov" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754651AbYDPOxj (ORCPT ); Wed, 16 Apr 2008 10:53:39 -0400 Received: from mailav2.fnal.gov (mailav2.fnal.gov [131.225.111.20]) by mailgw1.fnal.gov (iPlanet Messaging Server 5.2 HotFix 2.06 (built Mar 28 2005)) with SMTP id <0JZF0098F9G761@mailgw1.fnal.gov> for netdev@vger.kernel.org; Wed, 16 Apr 2008 09:50:22 -0500 (CDT) Received: from mailgw1.fnal.gov ([131.225.111.11]) by mailav2.fnal.gov (SAVSMTP 3.1.7.47) with SMTP id M2008041609502214235 for ; Wed, 16 Apr 2008 09:50:22 -0500 Received: from conversion-daemon.mailgw1.fnal.gov by mailgw1.fnal.gov (iPlanet Messaging Server 5.2 HotFix 2.06 (built Mar 28 2005)) id <0JZF00D01ADQYS@mailgw1.fnal.gov> (original mail from wenji@fnal.gov) for netdev@vger.kernel.org; Wed, 16 Apr 2008 09:50:22 -0500 (CDT) In-reply-to: <20080416.023551.70464279.davem@davemloft.net> Sender: netdev-owner@vger.kernel.org List-ID: >Right, we can tweak this thing further later. >*beep* *beep* >I've added John's patch to net-2.6.26 I just tried with John's patch. It works, saturating the 1Gbps in my test. Without the patch, the throughput is around 180Mbps with SACK On, 250Mbps with SACK off. The same test environment described in my previous emails. wenji