From owner-aic7xxx@FreeBSD.ORG Mon Sep 10 21:34:10 2007 Return-Path: Delivered-To: aic7xxx@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D0E3A16A417 for ; Mon, 10 Sep 2007 21:34:10 +0000 (UTC) (envelope-from Todd.Denniston@ssa.crane.navy.mil) Received: from cranemx2.crane.navy.mil (cranemx2.crane.navy.mil [199.10.16.12]) by mx1.freebsd.org (Postfix) with ESMTP id 7B05513C45D for ; Mon, 10 Sep 2007 21:34:10 +0000 (UTC) (envelope-from Todd.Denniston@ssa.crane.navy.mil) Received: from mail.tsb.cranrdte.navy.mil (localhost [127.0.0.1]) by cranemx2.crane.navy.mil (8.13.6+Sun/8.13.6) with ESMTP id l8ALX2VL017970; Mon, 10 Sep 2007 16:33:02 -0500 (CDT) Received: from [130.163.43.58] (dell-2.tsb.cranrdte.navy.mil [130.163.43.58]) by mail.tsb.cranrdte.navy.mil (8.13.8/8.13.8) with ESMTP id l8ALXp4H011136; Mon, 10 Sep 2007 16:34:05 -0500 Message-ID: <46E5B83F.4000006@ssa.crane.navy.mil> Date: Mon, 10 Sep 2007 16:33:51 -0500 From: Todd Denniston Organization: Code 6067, NSWC Crane User-Agent: Thunderbird 2.0.0.5 (X11/20070716) MIME-Version: 1.0 To: Steve Schlosser References: <4d362c350708022135y1f7e9abbx428ae12785cfbe45@mail.gmail.com> <4d362c350708141841w44ed1e2bo27e5adf13b62e422@mail.gmail.com> <46C2FFC7.4060403@ssa.crane.navy.mil> <4d362c350708150753j68fa3755p9efa857e3b000a85@mail.gmail.com> <46C3219B.40103@ssa.crane.navy.mil> In-Reply-To: <46C3219B.40103@ssa.crane.navy.mil> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV 0.88.7/4232/Mon Sep 10 13:18:12 2007 on mail.tsb.cranrdte.navy.mil X-Virus-Status: Clean Cc: aic7xxx@freebsd.org Subject: Re: Command queuing in Rev 7.0? X-BeenThere: aic7xxx@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Adaptec Device Drivers in FreeBSD and Linux List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 Sep 2007 21:34:10 -0000 Curiosity strikes me, have you solved your problem? did Uni vs Multi processor yield any difference? Todd Denniston wrote, On 08/15/2007 10:54 AM: > Steve Schlosser wrote, On 08/15/2007 09:53 AM: >> Thanks for the sanity checks. Unfortunately, it seems that I'm still >> stuck. Please find point-by-point responses embedded below. >> >> I'm going to try and rule out the benchmark. I've got another one >> that works using SG rather than file IO. >> >> Thanks again. >> >> -steve >> >> On 8/15/07, Todd Denniston wrote: >>> 4) both machines are running uniprocessor, or both smp? >> >> The 2.4 machine is uniprocessor and the 2.6 machine is smp. I haven't >> had a chance to match up the machines yet, but I can. >> > > I would suggest, just to rule out some weird SMP bug/BKL leftover, > either boot the smp machine with a uniprocessor kernel or pass the > bootparam > nosmp > or > maxcpus=0 > http://kerneltrap.org/man/linux/man7/bootparam.7 > > http://linux.about.com/library/cmd/blcmdl7_bootparam.htm > -- Todd Denniston Crane Division, Naval Surface Warfare Center (NSWC Crane) Harnessing the Power of Technology for the Warfighter