Date: Mon, 15 Apr 2002 12:16:46 +0200 (CEST) From: Lukas Ertl <l.ertl@univie.ac.at> To: Paul Saab <ps@mu.org> Cc: freebsd-scsi@freebsd.org Subject: Re: ciss driver and tagged queuing Message-ID: <20020415114324.N171-100000@pcle2.cc.univie.ac.at> In-Reply-To: <20020415094023.GA61115@elvis.mu.org>
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On Mon, 15 Apr 2002, Paul Saab wrote: > Lukas Ertl (l.ertl@univie.ac.at) wrote: > > > > On Sat, 13 Apr 2002, Paul Saab wrote: > > > > > Yea.. Mike and I discovered that the CAM sim was being frozen but nev= er > > > being unfrozen. Can you try this patch? > > > > thanks for the patch. Yes, the processes now don't lock up anymore, but > > the performance issues are still there. Read performance has improved, = but > > write performance is still low. > > Can you clarify "low"? What is your setup? How fast are the disks? > I can try to reproduce the same setup here, but you have to give us an > idea of what you're doing. Ok, I've listed my benchmark results at <http://mailbox.univie.ac.at/~le/bonnie.html>. Short breakdown of my setup: Two identical Compaq PL DL380G2 w/1133 MHz Pentium III and 1280 MB RAM. Box I ("Transtec SCSI/IDE Raid") has an Adaptec 3960D Ultra160 SCSI adapter inside, which is connected to a Transtec SCSI/IDE Raid box (speaks SCSI on the outside, has 12 80GB Seagate IDE disks inside, 11 of them are configure as RAID5). Box II ("Compaq Smart Array") has a Compaq Smart Array 5302 controller inside, which is connected to a Compaq Smart Array with 7 72GB Compaq SCSI disks (10k RPM), also configured as RAID5. (This is the box that was patched.) Stripe size of both RAID5 is 64k. regards, le --=20 Lukas Ertl eMail: l.ertl@univie.ac.at UNIX-Systemadministrator Tel.: (+43 1) 4277-14073 Zentraler Informatikdienst (ZID) Fax.: (+43 1) 4277-9140 der Universit=E4t Wien http://mailbox.univie.ac.at/~le/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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