From mboxrd@z Thu Jan 1 00:00:00 1970 From: Evgeniy Polyakov Subject: Re: [WIP][PATCHES] Network xmit batching Date: Tue, 19 Jun 2007 17:21:48 +0400 Message-ID: <20070619132148.GA32078@2ka.mipt.ru> References: <1181216629.4064.22.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=koi8-r Cc: Krishna Kumar2 , Gagan Arneja , netdev@vger.kernel.org, Rick Jones , Sridhar Samudrala , David Miller , Robert Olsson To: jamal Return-path: Received: from relay.2ka.mipt.ru ([194.85.82.65]:40188 "EHLO 2ka.mipt.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753305AbXFSOPe (ORCPT ); Tue, 19 Jun 2007 10:15:34 -0400 Content-Disposition: inline In-Reply-To: <1181216629.4064.22.camel@localhost> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Hi. On Thu, Jun 07, 2007 at 07:43:49AM -0400, jamal (hadi@cyberus.ca) wrote: > Folks, we need help. Please run this on different hardware. Evgeniy, i > thought this kind of stuff excites you, no? ;-> (wink, wink). > Only the sender needs the patch but the receiver must be a more powerful > machine (so that it is not the bottleneck). I've ran several simple tests with desktop e1000 adapter I managed to find. Test machine is amd athlon64 3500+ with 1gb of ram. Another point is dektop core duo 3.4 ghz with 2 gb of ram and sky2 driver. Simple test included test -> desktop and vice versa traffic with 128 and 4096 block size in netperf-2.4.3 setup. Test machine runs 2.6.22-rc5-batch and mainline tree (there is a test with 2.6.22-rc4 and there is a noticeble performance win compared to that tree in the latest git, likely tcp congestion changes resulted in better utilisation). Batched xmit has better numbers. Results: 2.6.20-ubuntu -> test machine 2.6.22-rc4-batch: 128: 725.43 724.14 4096: 698.63 712.77 2.6.22-rc5-mainline: 128: 760.91 762.04 4096: 784.32 788.53 2.6.22-rc5-batch: 128: 766.70 4096: 788.24 test machine -> 2.6.20-ubuntu 2.6.22-rc5-mainline: 128: 558.16 (Desired confidence was not achieved within the specified iterations.) 4096: 814.01 2.6.22-rc5-batch: 128: 569.14 (Desired confidence was not achieved within the specified iterations.) 4096: 822.72 -- Evgeniy Polyakov