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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.
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-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org



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