From owner-freebsd-questions Wed Jun 20 1: 9:26 2001 Delivered-To: freebsd-questions@freebsd.org Received: from mail.freebsd-corp-net-guide.com (mail.freebsd-corp-net-guide.com [206.29.169.15]) by hub.freebsd.org (Postfix) with ESMTP id 8AEF737B406 for ; Wed, 20 Jun 2001 01:09:18 -0700 (PDT) (envelope-from tedm@toybox.placo.com) Received: from tedm.placo.com (nat-rtr.freebsd-corp-net-guide.com [206.29.168.154]) by mail.freebsd-corp-net-guide.com (8.11.1/8.11.1) with SMTP id f5K89Al71263; Wed, 20 Jun 2001 01:09:10 -0700 (PDT) (envelope-from tedm@toybox.placo.com) From: "Ted Mittelstaedt" To: , "'Erik Trulsson'" Cc: Subject: RE: Significant Performance Drop during 4.0-4.3 Upgrade Date: Wed, 20 Jun 2001 01:09:10 -0700 Message-ID: <003a01c0f960$48e7c7a0$1401a8c0@tedm.placo.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 In-Reply-To: <000201c0f8b9$4ea26e40$04fea8c0@patches> X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3155.0 Importance: Normal Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG I was just speculating that perhaps you were in PIO mode before, and there is some hardware bug or other that is affecting things. Ted Mittelstaedt tedm@toybox.placo.com Author of: The FreeBSD Corporate Networker's Guide Book website: http://www.freebsd-corp-net-guide.com >-----Original Message----- >From: Rick Moore [mailto:rick@geckobot.com] >Sent: Tuesday, June 19, 2001 5:14 AM >To: 'Ted Mittelstaedt'; 'Erik Trulsson' >Cc: freebsd-questions@FreeBSD.ORG >Subject: RE: Significant Performance Drop during 4.0-4.3 Upgrade > > >Hi Ted! > >I am under the impression that I was running UDMA before, but I don't ever >recall verifying it. Sorry I don't have a more definitive answer. Using >sysctrl I've confirmed that I'm running UDMA now... > >Rick > > > >> -----Original Message----- >> From: Ted Mittelstaedt [mailto:tedm@toybox.placo.com] >> Sent: Monday, June 18, 2001 11:55 PM >> To: rick@geckobot.com; Erik Trulsson >> Cc: freebsd-questions@FreeBSD.ORG >> Subject: RE: Significant Performance Drop during 4.0-4.3 Upgrade >> >> >> Just a question, >> >> Were you running ULTRA DMA under 4.0 or were you running PIO >> mode? >> >> Ted Mittelstaedt tedm@toybox.placo.com >> Author of: The FreeBSD Corporate Networker's Guide >> Book website: http://www.freebsd-corp-net-guide.com >> >> >> >-----Original Message----- >> >From: owner-freebsd-questions@FreeBSD.ORG >> >[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Rick >> >Sent: Monday, June 18, 2001 4:43 PM >> >To: Erik Trulsson >> >Cc: freebsd-questions@FreeBSD.ORG >> >Subject: Re: Significant Performance Drop during 4.0-4.3 Upgrade >> > >> > >> >Hi Erik- >> > >> >Thanks for responding so quickly! Unless I did something wrong, >> >that didn't >> >seem to do the trick. I sure thought it was going to work, though. >> > >> >I added the following line to /boot/defaults/loader.conf: >> > >> >hw.ata.wc="1" >> > >> >...and rebooted but the performance hasn't picked up to >> where it was with >> >FreeBSD 4.0. It may have gone up some-- I haven't been tracking >> >the numbers >> >very closely. >> > >> >By coincidence, one of the three systems was upgraded to FreeBSD >> >4.3 STABLE >> >instead of RELEASE, and it too shows roughly the same >> performance metrics. >> > >> >If I didn't do this right, please let me know. Otherwise if >> you or anyone >> >has other thoughts, I'd be happy to give them a try. >> > >> >Rick >> > >> >BTW- I'm not sure it's worth mentioning, but I still don't see any >> >of this in >> >the 4.3 RELEASE notes... >> > >> > >> > >> >On Monday 18 June 2001 14:07, Erik Trulsson wrote: >> >> On Mon, Jun 18, 2001 at 01:44:23PM -0700, Rick wrote: >> >> > Hi! >> >> > >> >> > I just upgraded 3 servers from 4.0 to 4.3 FreeBSD using >> >sysinstall, and I >> >> > noticed that some rm -r operations seemed a little slow after the >> >> > upgrade. >> >> > >> >> > Coincidentally I've been working on an ISAM alternative >> to B-tree so I >> >> > have a bunch of performance benchmarks handy. The results: >> >> > >> >> > Disk hits are *much* slower after the upgrade. Many >> times slower, in >> >> > fact. I also had Berkley DB benchmarks that I was using >> for comparison >> >> > and they too were heavily impacted. >> >> > >> >> > For the life of me, I can't figure out what the heck happened! >> >> > SOFTUPDATES were off before the upgrade and I didn't >> change of the disk >> >> > tuning. I did tweak my kernel a bit, but nothing should >> have had this >> >> > effect-- I just removed a few things that weren't being >> used like EISA >> >> > and some network cards. When I examine dmesg everything >> still seems to >> >> > be recognized as ULTRA DMA, etc. I've tried putting >> everything back in >> >> > my kernel and I've try the GENERIC kernel with no improvements. >> >> > >> >> > I've looked through the release notes, etc., and couldn't find >> >anythingd >> >> > etailing this problem. Did I miss something? Am I just >> extra lucky? >> >> >> >> Yes, you missed one small thing. Write caching for IDE disks were >> >> turned off by default in 4.3-RELEASE. It has since been >> turned back on >> >> in 4.3-STABLE on since the performance hit was too big. >> >> (The reason it was turned off is that if you have the write-cache >> >> turned on can result in serious data-loss if you have a >> power failure.) >> >> >> >> You can turn it back on by setting hw.ata.wc=1 from the loader. >> >> See the manpages for ata(4) and loader(8) for more information. >> > >> >To Unsubscribe: send mail to majordomo@FreeBSD.org >> >with "unsubscribe freebsd-questions" in the body of the message >> > >> >> > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message