From mboxrd@z Thu Jan 1 00:00:00 1970 From: "David S. Miller" Subject: Re: Early SPECWeb99 results on 2.5.33 with TSO on e1000 Date: Fri, 06 Sep 2002 00:22:53 -0700 (PDT) Sender: netdev-bounce@oss.sgi.com Message-ID: <20020906.002253.32989079.davem@redhat.com> References: <18563262.1031269721@[10.10.2.3]> <20020905.235159.128049953.davem@redhat.com> <3D785AE4.A7E3DF2D@zip.com.au> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: Martin.Bligh@us.ibm.com, hadi@cyberus.ca, tcw@tempest.prismnet.com, linux-kernel@vger.kernel.org, netdev@oss.sgi.com, niv@us.ibm.com, Robert.Olsson@data.slu.se Return-path: To: akpm@zip.com.au In-Reply-To: <3D785AE4.A7E3DF2D@zip.com.au> Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org From: Andrew Morton Date: Fri, 06 Sep 2002 00:36:04 -0700 "David S. Miller" wrote: > NAPI is also not the panacea to all problems in the world. Mala did some testing on this a couple of weeks back. It appears that NAPI damaged performance significantly. http://www-124.ibm.com/developerworks/opensource/linuxperf/netperf/results/july_02/netperf2.5.25results.htm Unfortunately it is not listed what e1000 and core NAPI patch was used. Also, not listed, are the RX/TX mitigation and ring sizes given to the kernel module upon loading. Robert can comment on optimal settings Robert and Jamal can make a more detailed analysis of Mala's graphs than I.