From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wenji Wu Subject: RE: A Linux TCP SACK Question Date: Mon, 07 Apr 2008 09:56:46 -0500 Message-ID: <000701c898bf$99fc3f80$c95ee183@D2GT6T71> References: <1e41a3230804040927j3ce53a84u6a95ec37dff1b5b0@mail.gmail.com> <000001c8967c$496efa20$c95ee183@D2GT6T71> <000b01c89699$00e99590$c95ee183@D2GT6T71> <000f01c896a1$3022fec0$c95ee183@D2GT6T71> <649aecc70804051417l4cf9b30asec8ca8d55e79e051@mail.gmail.com> <649aecc70804061543v3ca3d0dau2ce303ecd2310bdc@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'?= , 'John Heffner' , 'Netdev' To: 'Sangtae Ha' Return-path: Received: from mailgw1.fnal.gov ([131.225.111.11]:36098 "EHLO mailgw1.fnal.gov" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753343AbYDGPBs (ORCPT ); Mon, 7 Apr 2008 11:01:48 -0400 Received: from mailav1.fnal.gov (mailav1.fnal.gov [131.225.111.18]) by mailgw1.fnal.gov (iPlanet Messaging Server 5.2 HotFix 2.06 (built Mar 28 2005)) with SMTP id <0JYY00IUVMSQ2R@mailgw1.fnal.gov> for netdev@vger.kernel.org; Mon, 07 Apr 2008 09:56:51 -0500 (CDT) Received: from mailgw2.fnal.gov ([131.225.111.12]) by mailav1.fnal.gov (SAVSMTP 3.1.7.47) with SMTP id M2008040709565002888 for ; Mon, 07 Apr 2008 09:56:50 -0500 Received: from conversion-daemon.mailgw2.fnal.gov by mailgw2.fnal.gov (iPlanet Messaging Server 5.2 HotFix 2.06 (built Mar 28 2005)) id <0JYY00E01MU1HB@mailgw2.fnal.gov> (original mail from wenji@fnal.gov) for netdev@vger.kernel.org; Mon, 07 Apr 2008 09:56:51 -0500 (CDT) In-reply-to: <649aecc70804061543v3ca3d0dau2ce303ecd2310bdc@mail.gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: >I don't think reorderings frequently happened in your directly >connected networking scenario. Please post your tcpdump file for >clearing out all doubts. https://plone3.fnal.gov/P0/WAN/Members/wenji/tcp_dump_files_sack/ Two tcpdump files: one with SACK on, the other with SACK off. The test configures described in my previous emails. Best, wenji