From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262282AbTJNLCc (ORCPT ); Tue, 14 Oct 2003 07:02:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262330AbTJNLCc (ORCPT ); Tue, 14 Oct 2003 07:02:32 -0400 Received: from gprs145-216.eurotel.cz ([160.218.145.216]:32901 "EHLO amd.ucw.cz") by vger.kernel.org with ESMTP id S262282AbTJNLCb (ORCPT ); Tue, 14 Oct 2003 07:02:31 -0400 Date: Tue, 14 Oct 2003 13:02:19 +0200 From: Pavel Machek To: George Anzinger Cc: "'high-res-timers-discourse@lists.sourceforge.net'" , "linux-kernel@vger.kernel.org" Subject: Re: [ANNOUNCE] VST (tick elimination) is now available Message-ID: <20031014110218.GA20211@elf.ucw.cz> References: <3F873067.9020805@mvista.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3F873067.9020805@mvista.com> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > The first release of the VST package is now available. VST or > Variable Scheduling Timeouts (or if you prefer, Variable Sleep Times) > contains code that, from the idle task, scans the timer list and, if > no timer is near, skips the timer interrupts that would otherwise be > generated. The patch name is hrtimers-vst-* > > The net result is that a quite system will use far less power as it > does not need to wake up ever 1/HZ timer tick. Do you have some measurements of how much power does it save? Making Sharp Zaurus run longer on batteries would certainly be nice ;-). Pavel -- When do you have a heart between your knees? [Johanka's followup: and *two* hearts?]