From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965461AbXDVICd (ORCPT ); Sun, 22 Apr 2007 04:02:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965512AbXDVICd (ORCPT ); Sun, 22 Apr 2007 04:02:33 -0400 Received: from server021.webpack.hosteurope.de ([80.237.130.29]:44751 "EHLO server021.webpack.hosteurope.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965461AbXDVICa (ORCPT ); Sun, 22 Apr 2007 04:02:30 -0400 From: Michael Gerdau Organization: Technosis GmbH To: ck@vds.kolivas.org Subject: Re: [ck] [ANNOUNCE] Staircase Deadline cpu scheduler version 0.45 Date: Sun, 22 Apr 2007 10:02:07 +0200 User-Agent: KMail/1.9.5 Cc: Con Kolivas , linux kernel mailing list , Ingo Molnar , Mike Galbraith , Al Boldi , Peter Williams , Nick Piggin , Matt Mackall , Bill Huey , William Lee Irwin III , Willy Tarreau , Gene Heskett References: <200704221441.48897.kernel@kolivas.org> In-Reply-To: <200704221441.48897.kernel@kolivas.org> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1749841.6YSV0uADGl"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200704221002.21289.mgd@technosis.de> X-bounce-key: webpack.hosteurope.de;mgd@technosis.de;1177228950;6465c97e; Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --nextPart1749841.6YSV0uADGl Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Hi Con, I now have 2.6.21-rc7-sd-0.45 running on my Intel Core2 T7600 2.33 machine and there is something I don't understand. =46or testing I have a Perl script that does some numbercrunching and runs a couple of hours. I have two scenarios a) start the job via loops in a shellscript b) start the job via a makefile (make -j 2) that I run in parallel. I watch the jobs via top and this is what I see: Job a) quickly gets about 100% (- 0-2) while job b) creates two perl jobs that both get 50% (- 0-2). I suppose it is expected behaviour that the single perl job created via a) gets same same share of the cpu as the two perl jobs created via b) together. However occasionally cpu drops to 33% for all three perl jobs while there is no other job visible in top (i.e. the sum drops from 200% to 100%). After some time this changes back to 100/50/50. How could this happen and would applying the other patch you mailed to Willy Tarreau help tracking that down ? Best wishes, Michael =2D-=20 Technosis GmbH, Gesch=E4ftsf=FChrer: Michael Gerdau, Tobias Dittmar Sitz Hamburg; HRB 89145 Amtsgericht Hamburg Vote against SPAM - see http://www.politik-digital.de/spam/ Michael Gerdau email: mgd@technosis.de GPG-keys available on request or at public keyserver --nextPart1749841.6YSV0uADGl Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) iD8DBQBGKxaNUYYhyuxDQc4RAog8AJ9xSI/r3xhOxF7lxZDuB+GhCq+d6gCfVpUI W7CFk5mZU5sJNd/OHabOv44= =e0a5 -----END PGP SIGNATURE----- --nextPart1749841.6YSV0uADGl--