From: "Svetoslav Slavtchev" <svetljo@gmx.de>
To: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: cfs-lk@nisupu.com, Tomi.Orava@ncircle.nullnet.fi,
linux-kernel@vger.kernel.org
Subject: Re: HighPoint 374
Date: Mon, 20 Oct 2003 23:25:15 +0200 (MEST) [thread overview]
Message-ID: <8402.1066685115@www30.gmx.net> (raw)
In-Reply-To: 200310202325.05384.bzolnier@elka.pw.edu.pl
>
> multicount affects PIO transfers performance only...
how could it then " resolve" DMA timeouts ?
> On Monday 20 of October 2003 23:07, Svetoslav Slavtchev wrote:
> > > BTW, isn't m0 supposed to reduce perfomance?
> >
> > hm here it also doesn't seem to change much,
> > may be it's ignored if UDMA is used
> >
> > mem is 1024Mb
> >
> > [root@svetljo kernel]# hdparm -m0 /dev/hde
> >
> > /dev/hde:
> > setting multcount to 0
> > multcount = 0 (off)
> >
> > [root@svetljo 1]# time dd if=/dev/zero of=10Gb.zeros count=20000 bs=512k
> > 20000+0 records in
> > 20000+0 records out
> > 0.09user 29.38system 5:44.49elapsed 8%CPU (0avgtext+0avgdata
> 0maxresident)k
> > 0inputs+0outputs (149major+40minor)pagefaults 0swaps
> > [root@svetljo 1]# hdparm -m8 /dev/hde
> >
> > /dev/hde:
> > setting multcount to 8
> > multcount = 8 (on)
> > [root@svetljo 1]# time dd if=/dev/zero of=10Gb.zeros count=20000 bs=512k
> > 20000+0 records in
> > 20000+0 records out
> > 0.10user 28.99system 5:50.44elapsed 8%CPU (0avgtext+0avgdata
> 0maxresident)k
> > 0inputs+0outputs (150major+41minor)pagefaults 0swaps
> >
> > root@svetljo 1]# hdparm -m16 /dev/hde
> >
> > /dev/hde:
> > setting multcount to 16
> > multcount = 16 (on)
> > [root@svetljo 1]# time dd if=/dev/zero of=10Gb.zeros count=20000 bs=512k
> > 20000+0 records in
> > 20000+0 records out
> > 0.09user 28.83system 5:53.57elapsed 8%CPU (0avgtext+0avgdata
> 0maxresident)k
> > 0inputs+0outputs (165major+40minor)pagefaults 0swaps
> > [root@svetljo 1]#
> >
> > > [root@fulanito wd1200jb]# time dd if=/dev/zero of=filling count=20000
> > > bs=65536
> > > 20000+0 records in
> > > 20000+0 records out
> > >
> > > real 0m33.763s
> > > user 0m0.200s
> > > sys 0m10.920s
> > > [root@fulanito wd1200jb]# hdparm -m4 /dev/hdk
> > >
> > > /dev/hdk:
> > > setting multcount to 4
> > > multcount = 4 (on)
> > > [root@fulanito wd1200jb]# time dd if=/dev/zero of=filling count=20000
> > > bs=65536
> > > 20000+0 records in
> > > 20000+0 records out
> > >
> > > real 0m30.321s
> > > user 0m0.150s
> > > sys 0m10.630s
> > > [root@fulanito wd1200jb]# hdparm -m0 /dev/hdk
> > >
> > > /dev/hdk:
> > > setting multcount to 0
> > > multcount = 0 (off)
> > > [root@fulanito wd1200jb]# time dd if=/dev/zero of=filling count=20000
> > > bs=65536
> > > 20000+0 records in
> > > 20000+0 records out
> > >
> > > real 0m30.749s
> > > user 0m0.130s
> > > sys 0m10.900s
> > > [root@fulanito wd1200jb]#
>
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next prev parent reply other threads:[~2003-10-20 21:25 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-19 19:57 HighPoint 374 Svetoslav Slavtchev
2003-10-19 20:30 ` Andre Hedrick
2003-10-19 20:46 ` Svetoslav Slavtchev
2003-10-19 20:51 ` Bartlomiej Zolnierkiewicz
2003-10-19 20:54 ` Svetoslav Slavtchev
2003-10-20 6:48 ` Jens Axboe
2003-10-20 7:43 ` Tomi Orava
2003-10-20 8:10 ` Svetoslav Slavtchev
2003-10-20 8:21 ` Nick Piggin
2003-10-20 8:30 ` Svetoslav Slavtchev
2003-10-19 21:51 ` Tomi Orava
2003-10-19 22:00 ` Svetoslav Slavtchev
2003-10-19 22:11 ` Svetoslav Slavtchev
2003-10-19 22:24 ` Tomi Orava
2003-10-20 7:53 ` Svetoslav Slavtchev
2003-10-20 8:03 ` Tomi Orava
2003-10-20 9:03 ` Svetoslav Slavtchev
2003-10-20 17:02 ` Carlos Fernandez Sanz
2003-10-20 19:14 ` Svetoslav Slavtchev
2003-10-20 20:23 ` Carlos Fernandez Sanz
2003-10-20 21:07 ` Svetoslav Slavtchev
2003-10-20 21:25 ` Bartlomiej Zolnierkiewicz
2003-10-20 21:25 ` Svetoslav Slavtchev [this message]
2003-10-21 18:43 ` Tomi Orava
2003-10-21 18:50 ` Tomi Orava
-- strict thread matches above, loose matches on Subject: below --
2003-10-21 9:23 Jindrich Makovicka
2003-10-21 16:59 ` Tomi Orava
2003-10-19 19:42 Christian Guggenberger
2003-10-19 19:54 ` Tomi Orava
2003-10-18 9:44 Carlos Fernandez Sanz
2003-10-18 10:15 ` Måns Rullgård
2003-10-19 12:13 ` Tomi Orava
2003-10-19 16:48 ` Carlos Fernandez Sanz
2003-10-19 17:16 ` Tomi Orava
2003-10-19 17:39 ` Carlos Fernandez Sanz
2003-10-19 19:27 ` Tomi Orava
2003-10-19 19:35 ` Carlos Fernandez Sanz
2003-10-19 15:59 ` Joel Smith
2003-10-19 17:24 ` Tomi Orava
2003-10-19 17:42 ` Måns Rullgård
2003-10-19 19:14 ` Tomi Orava
2003-10-19 19:27 ` Carlos Fernandez Sanz
2003-10-19 19:39 ` Tomi Orava
2003-10-19 20:12 ` Carlos Fernandez Sanz
2003-10-19 19:39 ` Måns Rullgård
2003-10-19 19:54 ` David B. Stevens
2003-10-20 8:38 ` Geller Sandor
2003-10-19 21:12 ` Joel Smith
2003-10-19 17:28 ` Carlos Fernandez Sanz
2003-10-19 21:35 ` Joel Smith
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