From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wenji Wu Subject: RE: RE: A Linux TCP SACK Question Date: Wed, 16 Apr 2008 09:46:04 -0500 Message-ID: <000101c89fd0$98bbfd50$6b5ee183@D2GT6T71> References: <000301c89e81$80124570$6b5ee183@D2GT6T71> <1e41a3230804141748v2bf1f32bsc80307c9390c222@mail.gmail.com> <1e41a3230804151540i1f7cee4dva6adc6ef25dae546@mail.gmail.com> Reply-To: wenji@fnal.gov Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 7BIT Cc: =?iso-8859-1?Q?'Ilpo_J=E4rvinen'?= , 'Netdev' To: 'John Heffner' 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 S1753211AbYDPOxi (ORCPT ); Wed, 16 Apr 2008 10:53:38 -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 09:46:07 -0500 (CDT) Received: from mailgw1.fnal.gov ([131.225.111.11]) by mailav2.fnal.gov (SAVSMTP 3.1.7.47) with SMTP id M2008041609460713845 for ; Wed, 16 Apr 2008 09:46:07 -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 <0JZF00801AABKZ@mailgw1.fnal.gov> (original mail from wenji@fnal.gov) for netdev@vger.kernel.org; Wed, 16 Apr 2008 09:46:07 -0500 (CDT) In-reply-to: <1e41a3230804151540i1f7cee4dva6adc6ef25dae546@mail.gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: >Wenji, can you try this out? Patch against net-2.6.26. I just try with the new patch. It works, saturating the 1Gbps link. The experiment works as: Sender --- Router --- Receiver Iperf is sending from the sender to the receiver. In between there is an emulated router which runs netem. The emulated router has two interfaces, both with netem configured. One interface emulates the forward path and the other for the reverse path. Both netem interfaces are configured with 1.5ms delay and 0.15ms variance. No packet drops. Kernel 2.6.25-rc9 patched with the file you provided Thanks, wenji