Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933796AbYAaS2J (ORCPT ); Thu, 31 Jan 2008 13:28:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1763053AbYAaS1w (ORCPT ); Thu, 31 Jan 2008 13:27:52 -0500 Received: from mga11.intel.com ([192.55.52.93]:44663 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757102AbYAaS1v convert rfc822-to-8bit (ORCPT ); Thu, 31 Jan 2008 13:27:51 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.25,286,1199692800"; d="scan'208";a="294691043" X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT Subject: RE: e1000 full-duplex TCP performance well below wire speed Date: Thu, 31 Jan 2008 10:26:16 -0800 Message-ID: <36D9DB17C6DE9E40B059440DB8D95F52044F9076@orsmsx418.amr.corp.intel.com> In-Reply-To: <20080131064533.ef0ae932.billfink@mindspring.com> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: e1000 full-duplex TCP performance well below wire speed Thread-Index: Achj/yDHff8hlzEFR1WyIrrytqA+dAAMO3qw References: <20080130.055333.192844925.davem@davemloft.net><20080130082136.1017631d@deepthought><649aecc70801301617m6331bcb8i8ce60366e182c739@mail.gmail.com> <20080131064533.ef0ae932.billfink@mindspring.com> From: "Brandeburg, Jesse" To: "Bill Fink" , "SANGTAE HA" Cc: "Bruce Allen" , "Linux Kernel Mailing List" , , "Stephen Hemminger" X-OriginalArrivalTime: 31 Jan 2008 18:26:17.0474 (UTC) FILETIME=[C4E9FE20:01C86436] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1073 Lines: 26 Bill Fink wrote: > a 2.6.15.4 kernel. The GigE NICs are Intel PRO/1000 > 82546EB_QUAD_COPPER, > on a 64-bit/133-MHz PCI-X bus, using version 6.1.16-k2 of the e1000 > driver, and running with 9000-byte jumbo frames. The TCP congestion > control is BIC. Bill, FYI, there was a known issue with e1000 (fixed in 7.0.38-k2) and socket charge due to truesize that kept one end or the other from opening its window. The result is not so great performance, and you must upgrade the driver at both ends to fix it. it was fixed in commit 9e2feace1acd38d7a3b1275f7f9f8a397d09040e That commit itself needed a couple of follow on bug fixes, but the point is that you could download 7.3.20 from sourceforge (which would compile on your kernel) and compare the performance with it if you were interested in a further experiment. Jesse -- 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/