Date: Mon, 10 Sep 2007 16:33:51 -0500 From: Todd Denniston <Todd.Denniston@ssa.crane.navy.mil> To: Steve Schlosser <swschlosser@gmail.com> Cc: aic7xxx@freebsd.org Subject: Re: Command queuing in Rev 7.0? Message-ID: <46E5B83F.4000006@ssa.crane.navy.mil> In-Reply-To: <46C3219B.40103@ssa.crane.navy.mil> 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>
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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 <Todd.Denniston@ssa.crane.navy.mil> wrote: <SNIP> >>> 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 > <SNIP> -- Todd Denniston Crane Division, Naval Surface Warfare Center (NSWC Crane) Harnessing the Power of Technology for the Warfighter
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