Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762988AbYAaPyv (ORCPT ); Thu, 31 Jan 2008 10:54:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757173AbYAaPyl (ORCPT ); Thu, 31 Jan 2008 10:54:41 -0500 Received: from trinity.phys.uwm.edu ([129.89.57.159]:50280 "EHLO trinity.phys.uwm.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757101AbYAaPyk (ORCPT ); Thu, 31 Jan 2008 10:54:40 -0500 Date: Thu, 31 Jan 2008 09:54:26 -0600 (CST) From: Bruce Allen X-X-Sender: ballen@trinity.phys.uwm.edu To: Bill Fink cc: SANGTAE HA , Linux Kernel Mailing List , netdev@vger.kernel.org, Stephen Hemminger Subject: Re: e1000 full-duplex TCP performance well below wire speed In-Reply-To: <20080131064533.ef0ae932.billfink@mindspring.com> Message-ID: References: <20080130.055333.192844925.davem@davemloft.net> <20080130082136.1017631d@deepthought> <649aecc70801301617m6331bcb8i8ce60366e182c739@mail.gmail.com> <20080131064533.ef0ae932.billfink@mindspring.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 587 Lines: 16 Hi Bill, > I see similar results on my test systems Thanks for this report and for confirming our observations. Could you please confirm that a single-port bidrectional UDP link runs at wire speed? This helps to localize the problem to the TCP stack or interaction of the TCP stack with the e1000 driver and hardware. Cheers, Bruce -- 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/