Date: Tue, 21 Dec 2004 10:35:03 -0800 (PST) From: Doug White <dwhite@gumbysoft.com> To: Michael Meltzer <mjm@michaelmeltzer.com> Cc: current@freebsd.org Subject: Re: twa driver, 3ware 9500s-4lp, speed issue Message-ID: <20041221103449.Q75632@carver.gumbysoft.com> In-Reply-To: <41C78F9B.4010804@michaelmeltzer.com> References: <41C78F9B.4010804@michaelmeltzer.com>
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Sorry for the top post, but there's one imporant thing you forgot: Volume config? On Mon, 20 Dec 2004, Michael Meltzer wrote: > I have a 3ware 9500s-4lp controller with 4 10,000rpm raptors hooked up > to it. 0+1 configuration. AMD dual 64 bit processor. > > This Hardware setup had Sese 9.1 running on it for a few days, One on > the issues I had was that the controller seemed "slow". After reading > 3ware white paper for turning for 2.6, the issue seemed to be buffer > read ahead, i.e. blockdev -setra 16384 /dev/sda was needed for any type > of read speed. Some quick benchmark under Bonnie++ Sequential read > speeds from the mid 40's to 105meg/sec and had the write remained around > 98 meg/sec. > > Now the Problem. loaded 5.3 , cvsup'ed and built for freebsd 5.3 stable, > same hardware, the controller is feeling "slow" again. I tried to play > with the vfs prams (vfs.read_max after some googling around). I could > not find much information(other than the handbook) about the vfs prams > and was unable to increase the speed. Can Any one sheed some light, > subjections? insight, Gratefull for any help. > > Her is a iozone report pretty close to the linux bonnie++(sorry the > bonnie failed) to give you all an idea whats up. exect same hardware. > only change was OS and filesystem. Thank You > > MJM > > iozone -s 20480m -r 60 -i 0 -i 1 -t 1 > Iozone: Performance Test of File I/O > Version $Revision: 3.196 $ > Compiled for 64 bit mode. > Build: freebsd > > Contributors:William Norcott, Don Capps, Isom Crawford, Kirby > Collins > Al Slater, Scott Rhine, Mike Wisner, Ken Goss > Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, > Randy Dunlap, Mark Montague, Dan Million, > Jean-Marc Zucconi, Jeff Blomberg. > > Run began: Mon Dec 20 21:03:36 2004 > > File size set to 20971520 KB > Record Size 60 KB > Command line used: iozone -s 20480m -r 60 -i 0 -i 1 -t 1 > Output is in Kbytes/sec > Time Resolution = 0.000001 seconds. > Processor cache size set to 1024 Kbytes. > Processor cache line size set to 32 bytes. > File stride size set to 17 * record size. > Throughput test with 1 process > Each process writes a 20971520 Kbyte file in 60 Kbyte records > > Children see throughput for 1 initial writers = 78738.67 KB/sec > Parent sees throughput for 1 initial writers = 78716.55 KB/sec > Min throughput per process = 78738.67 KB/sec > Max throughput per process = 78738.67 KB/sec > Avg throughput per process = 78738.67 KB/sec > Min xfer = 20971500.00 KB > > Children see throughput for 1 rewriters = 32126.46 KB/sec > Parent sees throughput for 1 rewriters = 32125.77 KB/sec > Min throughput per process = 32126.46 KB/sec > Max throughput per process = 32126.46 KB/sec > Avg throughput per process = 32126.46 KB/sec > Min xfer = 20971500.00 KB > > Children see throughput for 1 readers = 58563.70 KB/sec > Parent sees throughput for 1 readers = 58557.14 KB/sec > Min throughput per process = 58563.70 KB/sec > Max throughput per process = 58563.70 KB/sec > Avg throughput per process = 58563.70 KB/sec > Min xfer = 20971500.00 KB > > Children see throughput for 1 re-readers = 58583.77 KB/sec > Parent sees throughput for 1 re-readers = 58581.98 KB/sec > Min throughput per process = 58583.77 KB/sec > Max throughput per process = 58583.77 KB/sec > Avg throughput per process = 58583.77 KB/sec > Min xfer = 20971500.00 KB > > > > iozone test complete. > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" > -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | www.FreeBSD.org
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