Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753723AbZIJTzK (ORCPT ); Thu, 10 Sep 2009 15:55:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753481AbZIJTzK (ORCPT ); Thu, 10 Sep 2009 15:55:10 -0400 Received: from mondschein.lichtvoll.de ([194.150.191.11]:46662 "EHLO mail.lichtvoll.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753473AbZIJTzJ (ORCPT ); Thu, 10 Sep 2009 15:55:09 -0400 X-Greylist: delayed 552 seconds by postgrey-1.27 at vger.kernel.org; Thu, 10 Sep 2009 15:55:09 EDT From: Martin Steigerwald To: linux-kernel@vger.kernel.org Subject: Re: BFS vs. mainline scheduler benchmarks and measurements Date: Thu, 10 Sep 2009 21:45:47 +0200 User-Agent: KMail/1.12.1 (Linux/2.6.31-rc7-tp42-toi-3.0.1-04741-g57e61c0; KDE/4.3.1; i686; ; ) Cc: Peter Zijlstra , Nikos Chantziaras , Mike Galbraith , Ingo Molnar , Jens Axboe , Con Kolivas References: <20090906205952.GA6516@elte.hu> <4AA76FD2.1050103@arcor.de> <1252487869.7746.181.camel@twins> (sfid-20090909_111953_200988_A02CB5A6) In-Reply-To: <1252487869.7746.181.camel@twins> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart3556249.JiEUj4pTiB"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200909102145.53332.Martin@lichtvoll.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1979 Lines: 56 --nextPart3556249.JiEUj4pTiB Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: quoted-printable Am Mittwoch 09 September 2009 schrieb Peter Zijlstra: > On Wed, 2009-09-09 at 12:05 +0300, Nikos Chantziaras wrote: > > Thank you for mentioning min_granularity. After: > > > > echo 10000000 > /proc/sys/kernel/sched_latency_ns > > echo 2000000 > /proc/sys/kernel/sched_min_granularity_ns >=20 > You might also want to do: >=20 > echo 2000000 > /proc/sys/kernel/sched_wakeup_granularity_ns >=20 > That affects when a newly woken task will preempt an already running > task. Heh that scheduler thing again... and unfortunately Col appearing to feel=20 hurt while I am think that Ingo is honest on his offer on collaboration... While it makes fun playing with that numbers and indeed experiencing=20 subjectively a more fluid deskopt how about just a echo "This is a f* desktop!" > /proc/sys/kernel/sched_workload Or to say it in other words: The Linux kernel should not require me to=20 fine-tune three or more values to have the scheduler act in a way that=20 matches my workload. I am willing to test stuff on my work thinkpad and my Amarok thinkpad in=20 order to help improving with that. =2D-=20 Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 --nextPart3556249.JiEUj4pTiB Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEABECAAYFAkqpV2sACgkQmRvqrKWZhMf1xgCfT/nuF5hLfFXLXNydZcrZEPWp AXcAn0rCBasqT9KolgBeiYOc4+mfcq7I =c/UZ -----END PGP SIGNATURE----- --nextPart3556249.JiEUj4pTiB-- -- 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/