From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263214AbTJUSns (ORCPT ); Tue, 21 Oct 2003 14:43:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263228AbTJUSns (ORCPT ); Tue, 21 Oct 2003 14:43:48 -0400 Received: from ncircle.nullnet.fi ([62.236.96.207]:34694 "EHLO ncircle.nullnet.fi") by vger.kernel.org with ESMTP id S263214AbTJUSnp (ORCPT ); Tue, 21 Oct 2003 14:43:45 -0400 Message-ID: <34364.192.168.9.10.1066761821.squirrel@ncircle.nullnet.fi> In-Reply-To: <200310202325.05384.bzolnier@elka.pw.edu.pl> References: <001901c39734$8a2c2bb0$0514a8c0@HUSH> <31727.1066684060@www30.gmx.net> <200310202325.05384.bzolnier@elka.pw.edu.pl> Date: Tue, 21 Oct 2003 21:43:41 +0300 (EEST) Subject: Re: HighPoint 374 From: "Tomi Orava" To: "Bartlomiej Zolnierkiewicz" Cc: "Svetoslav Slavtchev" , "Carlos Fernandez Sanz" , linux-kernel@vger.kernel.org User-Agent: SquirrelMail/1.4.2 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Priority: 3 Importance: Normal Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Bartlomiej, > multicount affects PIO transfers performance only... This makes sense as I was finally able to run some tests and hdparm -m doesn't seem to affect anything. However, do the following errors tell you anything new ? (They were seen while copying almost 40GB of files from one RAID1-mirror (hpt374) to second RAID1-mirror( > > 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]# > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- Tomi.Orava@ncircle.nullnet.fi