From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Alan D. Brunelle" Subject: Re: Bad SCSI performance with 2.6.14 and Fusion-MPT Date: Thu, 17 Nov 2005 13:24:18 -0500 Message-ID: <437CCAD2.3050807@hp.com> References: <91888D455306F94EBD4D168954A9457C04F853D8@nacos172.co.lsil.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from ccerelbas04.cce.hp.com ([161.114.21.107]:29114 "EHLO ccerelbas04.cce.hp.com") by vger.kernel.org with ESMTP id S932447AbVKQSR3 (ORCPT ); Thu, 17 Nov 2005 13:17:29 -0500 In-Reply-To: <91888D455306F94EBD4D168954A9457C04F853D8@nacos172.co.lsil.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: "Moore, Eric Dean" Cc: Michael Renner , linux-scsi@vger.kernel.org Moore, Eric Dean wrote: >On Thursday, November 17, 2005 10:08 AM, Alan D. Brunelle wrote: > > >>>Please use the patch I posted last night, apply to 2.6.15-rc1-git4. >>>It addresses this issue. >>> >>>Here is the URL to this patch: >>> >>>http://marc.theaimsgroup.com/?l=linux-scsi&m=113219282408101&w=2 >>> >>>Eric Moore >>>LSI Logic >>> >>> >>> >>> >>> >>> >>FYI - I did try it earlier this morning with 2.6.14.2 and it >>did *not* >>fix the issue. I will see about updating to 2.6.15-rc1-git4, >>and trying >>that again... >> >> >> > >Ok, that make sense, I see your patch is handling mpt_config. > >So with the patch I provided at the link above, can you apply >this patch over that. I've added the sync code in mpt_config. >Please let me know the results. I also have a tool called >getspeed that I can send you. It dump's the programmed >speed the devices were negotiated at. > >Eric Moore > > > > > Hi Eric - I just added in this patch on top of the previous one (again, on 2.6.14.2) and it worked just fine - I'm getting full U320 16-bit transfers. I use % /usr/bin/sginfo -t 0x19,0x3 -Xz to determine this - prior to these patches I would see some of these: /dev/sde 255 0 0 0 2 0 0 Now I see: /dev/sde 8 127 1 87 2 1 3 Which is *much* better! Thanks! Alan PS. Expanded - SPI-4 Negotiated Settings mode subpage (0x19,0x3) -------------------------------------------- Transfer period 8 REQ/ACK offset 127 Transfer width exponent 1 Protocol option bits 87 Transciever mode 2 Sent PCOMP_EN 1 Received PCOMP_EN 3