From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261184AbVFAVi7 (ORCPT ); Wed, 1 Jun 2005 17:38:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261307AbVFAViL (ORCPT ); Wed, 1 Jun 2005 17:38:11 -0400 Received: from mail23.syd.optusnet.com.au ([211.29.133.164]:45212 "EHLO mail23.syd.optusnet.com.au") by vger.kernel.org with ESMTP id S261184AbVFAVg7 (ORCPT ); Wed, 1 Jun 2005 17:36:59 -0400 From: Con Kolivas To: steve.rotolo@ccur.com Subject: Re: SD_SHARE_CPUPOWER breaks scheduler fairness Date: Thu, 2 Jun 2005 07:37:16 +1000 User-Agent: KMail/1.8.1 Cc: linux-kernel@vger.kernel.org, bugsy@ccur.com References: <1117561608.1439.168.camel@whiz> <200506020047.16752.kernel@kolivas.org> <1117651285.22879.73.camel@bonefish> In-Reply-To: <1117651285.22879.73.camel@bonefish> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1493069.24kyQzLVK7"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200506020737.20098.kernel@kolivas.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --nextPart1493069.24kyQzLVK7 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Thu, 2 Jun 2005 04:41, Steve Rotolo wrote: > I guess the bottom-line is: given N logical cpus, 1/N of all > SCHED_NORMAL tasks may get stuck on a sibling cpu with no chance to > run. All it takes is one spinning SCHED_FIFO task. Sounds like a bug. You're right, and excuse me for missing it. We have to let SCHED_NORMAL tas= ks=20 run for some period with rt tasks. There shouldn't be any combination of=20 mutually exclusive tasks for siblings. I'll work on something. Cheers, Con --nextPart1493069.24kyQzLVK7 Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQBCniqQZUg7+tp6mRURAiwHAJ0TF/MZct4Qg+Zu3mMqNH+2bN4v8ACffJXQ vnrVYogdTp2zpul3Ut6ZP64= =2bah -----END PGP SIGNATURE----- --nextPart1493069.24kyQzLVK7--