From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.dvmed.net (srv5.dvmed.net [207.36.208.214]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id BB7C3DDF33 for ; Fri, 31 Aug 2007 23:32:22 +1000 (EST) Message-ID: <46D81861.3010003@garzik.org> Date: Fri, 31 Aug 2007 09:32:17 -0400 From: Jeff Garzik MIME-Version: 1.0 To: Brian King Subject: Re: [PATCH 1/6] ibmveth: Enable TCP checksum offload References: <11873601831813-patch-mail.ibm.com> In-Reply-To: <11873601831813-patch-mail.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Cc: linuxppc-dev@ozlabs.org, rcjenn@linux.vnet.ibm.com, santil@linux.vnet.ibm.com, netdev@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Brian King wrote: > This patchset enables TCP checksum offload support for IPV4 > on ibmveth. This completely eliminates the generation and checking of > the checksum for packets that are completely virtual and never > touch a physical network. A simple TCP_STREAM netperf run on > a virtual network with maximum mtu set yielded a ~30% increase > in throughput. This feature is enabled by default on systems that > support it, but can be disabled with a module option. > > Signed-off-by: Brian King applied 1-6 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [PATCH 1/6] ibmveth: Enable TCP checksum offload Date: Fri, 31 Aug 2007 09:32:17 -0400 Message-ID: <46D81861.3010003@garzik.org> References: <11873601831813-patch-mail.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: santil@linux.vnet.ibm.com, rcjenn@linux.vnet.ibm.com, netdev@vger.kernel.org, linuxppc-dev@ozlabs.org To: Brian King Return-path: Received: from srv5.dvmed.net ([207.36.208.214]:43265 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965030AbXHaNcT (ORCPT ); Fri, 31 Aug 2007 09:32:19 -0400 In-Reply-To: <11873601831813-patch-mail.ibm.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Brian King wrote: > This patchset enables TCP checksum offload support for IPV4 > on ibmveth. This completely eliminates the generation and checking of > the checksum for packets that are completely virtual and never > touch a physical network. A simple TCP_STREAM netperf run on > a virtual network with maximum mtu set yielded a ~30% increase > in throughput. This feature is enabled by default on systems that > support it, but can be disabled with a module option. > > Signed-off-by: Brian King applied 1-6