From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261241AbULINrP (ORCPT ); Thu, 9 Dec 2004 08:47:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261254AbULINrP (ORCPT ); Thu, 9 Dec 2004 08:47:15 -0500 Received: from got80-74-137-2.ch-meta.net ([80.74.137.2]:36784 "EHLO gothicus.metanet.ch") by vger.kernel.org with ESMTP id S261241AbULINrN (ORCPT ); Thu, 9 Dec 2004 08:47:13 -0500 From: Thomas Bettler To: linux-kernel@vger.kernel.org Subject: uhci-hcd and cpufreq Date: Thu, 9 Dec 2004 14:47:11 +0100 User-Agent: KMail/1.7.1 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200412091447.11996.bettlert@student.ethz.ch> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I found out the uhci-hcd causes the cpu to work at highest frequecy (according to x86info -mhz). If I unload it, cpu frequency dropps from full (1.8GHz) to ~2/3 (1.1GHz). In both cases top shows 97% or even 99% idle. 1. Why causes uhci-hcd that high frequency at no obiously load? 2. Could this behaviour be stopped or do we have to live with it? This is what I could find out. But I won't get further since I not a hacker, just a user. Thanks anyway for all your work. Thomas Bettler