From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262066AbTJTVZ0 (ORCPT ); Mon, 20 Oct 2003 17:25:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262221AbTJTVZ0 (ORCPT ); Mon, 20 Oct 2003 17:25:26 -0400 Received: from pop.gmx.net ([213.165.64.20]:27094 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S262066AbTJTVZQ (ORCPT ); Mon, 20 Oct 2003 17:25:16 -0400 Date: Mon, 20 Oct 2003 23:25:15 +0200 (MEST) From: "Svetoslav Slavtchev" To: Bartlomiej Zolnierkiewicz Cc: cfs-lk@nisupu.com, Tomi.Orava@ncircle.nullnet.fi, linux-kernel@vger.kernel.org MIME-Version: 1.0 References: <200310202325.05384.bzolnier@elka.pw.edu.pl> Subject: Re: HighPoint 374 X-Priority: 3 (Normal) X-Authenticated: #20183004 Message-ID: <8402.1066685115@www30.gmx.net> X-Mailer: WWW-Mail 1.6 (Global Message Exchange) X-Flags: 0001 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > > 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]# > -- NEU FÜR ALLE - GMX MediaCenter - für Fotos, Musik, Dateien... Fotoalbum, File Sharing, MMS, Multimedia-Gruß, GMX FotoService Jetzt kostenlos anmelden unter http://www.gmx.net +++ GMX - die erste Adresse für Mail, Message, More! +++