From mboxrd@z Thu Jan 1 00:00:00 1970 From: Manuel Krause Subject: Re: udpated data logging available Date: Wed, 02 Jul 2003 02:46:35 +0200 Message-ID: <3F022B6B.3010801@netscape.net> References: <1055764071.24111.650.camel@tiny.suse.com> <200306260216.41204.christian.mayrhuber@gmx.net> <1056592066.20899.10.camel@tiny.suse.com> <200306261342.08725.Dieter.Nuetzel@hamburg.de> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: <200306261342.08725.Dieter.Nuetzel@hamburg.de> List-Id: Content-Type: text/plain; charset="iso-8859-1" To: =?ISO-8859-15?Q?Dieter_N=FCtzel?= Cc: reiserfs-list On 06/26/2003 01:42 PM, Dieter N=FCtzel wrote: > Am Donnerstag, 26. Juni 2003 03:47 schrieb Chris Mason: >=20 >>On Wed, 2003-06-25 at 20:16, Christian Mayrhuber wrote: >> >>>Am Mittwoch, 25. Juni 2003 21:15 schrieb Chris Mason: >>> >>>>Thanks for giving things a try. I just uploaded io-stalls-7.diff, >>>>which should do better at fixing latency during heavy io. >>>> >>>>-chris >>> >>>My feeling is that io-stalls-6 is where standard 2.4.21 was if it comes >>>down to latency. But io-stalls-7 makes a big improvement for me during >>>heavy io. The directory listing in Konqueror, including image preview, >>>appears nearly immedeately even during heavy io. >> >>Great to hear, thanks for giving it a try. io-stalls-6 helped most when >>you've got multiple devices and a streaming write to one was slowing >>down all the others. -7 added in a tweaked form of Andrea's elevator >>latency fixes, and they make a big difference when there's a lot of >>writes to the drive you're trying to read from. >=20 > So, does it apply to 2.4.21-aa1 (latest is 2.4.21rc8aa1) cleanly? ;-) >=20 > Setting HZ=3D1000 (from 100) in linux/include/asm/param.h give me very=20 > impressive latency boost. 2.4.21-rc1-jam1 (-rc1aa1) Just tried this HZ=3D1000 setting, too. (With the following patches "only": data-logging, search_reada-4 and rml-preempt on 2.4.21-final, and AA.00_nanosleep-6.diff (THAT ONE decreased my VMware+system CPU idle usage in these circumstances by approx. 1/2 [from 25% to approx. 12.5%] ). I don't get any performance boost with it -- but some finer distribution of "requests" like from disk i/o, screen interaction (XF86-4.3.0-SuSE-8.0) and running applications' progress together with high mem/disk load (the result is my word for "finer granularity" in computer usage). That setting feels much better than normal (HZ=3D100). Would I face problems, though?! Why isn't that setting standard ? > Would you have some latencytest0.42-png numbers? >=20 > But ACPI will not shut down my SMP system (same with HZ=3D100) most of the= time.=20 > I had it accidentally set to HZ=3D1024 and it power down all the time...;-= ) >=20 >>Hopefully we'll be able to hash out something suitable for 2.4.22-pre. >=20 > 2.4.22-pre1 is out form some days... >=20 > Regards, > Dieter Thanks, Manuel -- @ list.ReiserFS: I need to change my mail address from: manuel.krause @AT *.tu-ilmenau.de to: manuelkrause @AT netscape.net - Change @AT and the spaces to get contact.