From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932325AbWGRRa2 (ORCPT ); Tue, 18 Jul 2006 13:30:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932327AbWGRRa2 (ORCPT ); Tue, 18 Jul 2006 13:30:28 -0400 Received: from 125.14.cm.sunflower.com ([24.124.14.125]:32979 "EHLO mail.atipa.com") by vger.kernel.org with ESMTP id S932325AbWGRRa2 (ORCPT ); Tue, 18 Jul 2006 13:30:28 -0400 Message-ID: <44BD1AB6.10009@atipa.com> Date: Tue, 18 Jul 2006 12:30:30 -0500 From: Roger Heflin User-Agent: Thunderbird 1.5 (X11/20060313) MIME-Version: 1.0 To: Linux-Kernel , mpt_linux_developer@lsil.com Subject: newer MPT speed issue on Linux Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 18 Jul 2006 17:30:31.0674 (UTC) FILETIME=[DE81EDA0:01C6AA8F] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello, I am have tested with Sles9.1sp1, Sp3, and kernel.org 2.6.17.6 and here are some results: SLES9.1sp1 (kernel only) 100-120MB/second writes 75-80MB/second reads SLES9.0sp3 20-30MB/second writes 2.6.17.6 20-30MB/second writes 140-150MB/second reads This is with the LSI Logic / Symbios Logic FC929X Fibre Channel Adapter (rev 81) All 3 are with a SLES9sp3 distribution and are on the same machine with only the kernel being changed. The test is a simple "dd if=/dev/zero of=/dev/dk001/two bs=65536 &" with vmstat being used to determine io speed. Bonnie++ is getting similar results to what dd is generating when writing to a filesystem. The fiber channel card is hooked to a external raid5 chassis, and it being accessed though LVM. Are there some parameters that I am missing that could speed the writes up? The reads on the newer driver are a nice improvement, but the writes on the newer driver are horrible in my testing. Roger