Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757522Ab0DRTCU (ORCPT ); Sun, 18 Apr 2010 15:02:20 -0400 Received: from casper.infradead.org ([85.118.1.10]:44610 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751609Ab0DRTCP (ORCPT ); Sun, 18 Apr 2010 15:02:15 -0400 Date: Sun, 18 Apr 2010 11:59:49 -0700 From: Arjan van de Ven To: linux-kernel@vger.kernel.org Cc: akpm@linux-foundation.org, mingo@elte.hu, peterz@infradead.org, tglx@linutronix.de, davej@redhat.com, cpufreq@vger.kernel.org Subject: [PATCH 0/7] Fix performance issue with ondemand governor Message-ID: <20100418115949.7b743898@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 Content-Length: 787 Lines: 17 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/