From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753510Ab0EIPYT (ORCPT ); Sun, 9 May 2010 11:24:19 -0400 Received: from casper.infradead.org ([85.118.1.10]:40360 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751885Ab0EIPYR (ORCPT ); Sun, 9 May 2010 11:24:17 -0400 Date: Sun, 9 May 2010 08:21:26 -0700 From: Arjan van de Ven To: linux-kernel@vger.kernel.org Cc: mingo@elte.hu, davej@redhat.com Subject: [PATCH v2 0/8] Fix performance issue with ondemand governor Message-ID: <20100509082126.4a080d46@infradead.org> Organization: Intel X-Mailer: Claws Mail 3.7.5 (GTK+ 2.16.6; i586-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [Version 2 includes the acks/etc. Andrew: no changes from the patches that are in -mm] There have been various reports of the ondemand governor causing some serious performance issues, one of the latest ones from Andrew. There are several fundamental issues with ondemand (being worked on), but the report from Andrew can be fixed relatively easily. The fundamental issue is that ondemand will go to a (too) low CPU frequency for workloads that alternatingly disk and CPU bound... -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org