From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754576AbXDXEgh (ORCPT ); Tue, 24 Apr 2007 00:36:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754575AbXDXEgh (ORCPT ); Tue, 24 Apr 2007 00:36:37 -0400 Received: from mail.gmx.net ([213.165.64.20]:39344 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1161552AbXDXEgg (ORCPT ); Tue, 24 Apr 2007 00:36:36 -0400 X-Authenticated: #14349625 X-Provags-ID: V01U2FsdGVkX18YI2wK2XYYw2dFF5E19TWeiPajVqdZylE4pTFicN d3BHCX7nhmGPNE Subject: Re: [RFC] another scheduler beater From: Mike Galbraith To: davidsen@posidon.tmr.com Cc: Linux Kernel M/L In-Reply-To: <462D2B4E.7050009@tmr.com> References: <462D2B4E.7050009@tmr.com> Content-Type: text/plain Date: Tue, 24 Apr 2007 06:36:33 +0200 Message-Id: <1177389393.6299.16.camel@Homer.simpson.net> Mime-Version: 1.0 X-Mailer: Evolution 2.8.2 Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2007-04-23 at 17:55 -0400, Bill Davidsen wrote: > Based on just this script as load I would say renice on X isn't a good > thing. Based on one small test, I would say that renice of X in > conjunction with heavy disk i/o and a single fast scrolling xterm (think > kernel compile) seems to slow the raid6 thread measurably. Yeah, I was testing a UP kernel yesterday. It doesn't take much renice to severely injure the competition with them having no place else to go. Nice -19 is definitely overkill. -Mike