From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262859AbTLMCZP (ORCPT ); Fri, 12 Dec 2003 21:25:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263002AbTLMCZP (ORCPT ); Fri, 12 Dec 2003 21:25:15 -0500 Received: from main.gmane.org ([80.91.224.249]:15787 "EHLO main.gmane.org") by vger.kernel.org with ESMTP id S262859AbTLMCZK (ORCPT ); Fri, 12 Dec 2003 21:25:10 -0500 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: mru@kth.se (=?iso-8859-1?q?M=E5ns_Rullg=E5rd?=) Subject: Re: Increasing HZ (patch for HZ > 1000) Date: Sat, 13 Dec 2003 03:25:07 +0100 Message-ID: References: <1071126929.5149.24.camel@idefix.homelinux.org> <1293500000.1071127099@[10.10.2.4]> <20031212220853.GA314@elf.ucw.cz> <1071269849.4182.14.camel@idefix.homelinux.org> <20031212234028.GA541@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Complaints-To: usenet@sea.gmane.org User-Agent: Gnus/5.1002 (Gnus v5.10.2) XEmacs/21.4 (Rational FORTRAN, linux) Cancel-Lock: sha1:iOFnCV1BWxZmX4VWOSbwZC5Qs1I= Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Pavel Machek writes: >> > Every notebook from thinkpad 560X up has produced some kind of >> > cpu-load-related-noise. You'd have to throw out quite a lot of >> > notebooks... >> >> You're right, I'm probably not the only one. It may be worth at least >> having an option to change HZ to less annoying values. Otherwise there >> are going to be lots of complaints when people try out 2.6 on their >> laptops and hear that noise. On mine, I seriously could not stand the >> noise more than 5 minutes. Not because it was that loud but 1 kHz is >> really annoying. > > Okay, we are probably taking other sounds. I can hear cpu-load-related > noise on every notebook from thinkpad 560X -- in a quiet room, and on > some machines its rather hard to notice. You probably have way more > annoying problem. My laptop makes a slight noise in the speakers when there are interrupts. It's only noticeable with an external amplifier connected. There's also some ~1 kHz sound coming from the vicinity of the CPU, particularly when there is network activity. -- Måns Rullgård mru@kth.se