From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261167AbVFBPr7 (ORCPT ); Thu, 2 Jun 2005 11:47:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261168AbVFBPr7 (ORCPT ); Thu, 2 Jun 2005 11:47:59 -0400 Received: from mail.ccur.com ([208.248.32.212]:48177 "EHLO flmx.iccur.com") by vger.kernel.org with ESMTP id S261167AbVFBPr6 (ORCPT ); Thu, 2 Jun 2005 11:47:58 -0400 Subject: Re: SD_SHARE_CPUPOWER breaks scheduler fairness From: Steve Rotolo To: Con Kolivas Cc: joe.korty@ccur.com, linux-kernel@vger.kernel.org, bugsy@ccur.com In-Reply-To: <200506022334.31430.kernel@kolivas.org> References: <1117561608.1439.168.camel@whiz> <200506020925.26320.kernel@kolivas.org> <1117719021.1436.56.camel@whiz> <200506022334.31430.kernel@kolivas.org> Content-Type: text/plain Organization: Concurrent Computer Corporation Message-Id: <1117727326.1436.73.camel@whiz> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.5 (1.4.5-1) Date: Thu, 02 Jun 2005 11:48:46 -0400 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 02 Jun 2005 15:47:53.0109 (UTC) FILETIME=[6FF03C50:01C5678A] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2005-06-02 at 09:34, Con Kolivas wrote: > Funny you should mention this. Check the latest -mm code and you'll see Andrew > has merged my smp nice code which takes into account "nice" values and alters > balancing according to nice values and heavily biases them when real time > tasks are running. So you are correct, and it is a problem common to any > per-cpu runqueue designed scheduler (which interestingly there is evidence > that windows went to in about 2003 because it exhibited this very problem). > However my code should make this behave better now. > Glad to hear this is in --mm! And BTW, your patch works great with my HT test case. Thanks -- good job. -- Steve