twa driver, 3ware 9500s-4lp, speed issue
Doug White
dwhite at gumbysoft.com
Tue Dec 21 10:35:03 PST 2004
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.
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--
Doug White | FreeBSD: The Power to Serve
dwhite at gumbysoft.com | www.FreeBSD.org
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