From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jordan Crouse" Subject: Re: comments on irc log Date: Mon, 21 Mar 2005 13:06:12 -0700 Message-ID: <20050321130612.135d726e@cosmic.amd.com> References: <1111113131.25179.73.camel@gaston> <20050318181317.GD18427@elf.ucw.cz> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============87061931891652256==" In-Reply-To: <20050318181317.GD18427-I/5MKhXcvmPrBKCeMvbIDA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces-qjLDD68F18O7TbgM5vRIOg@public.gmane.org Errors-To: linux-pm-bounces-qjLDD68F18O7TbgM5vRIOg@public.gmane.org To: Linux-pm mailing list List-Id: linux-pm@vger.kernel.org --===============87061931891652256== Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit On Fri, 18 Mar 2005 19:13:17 +0100 "Pavel Machek" wrote: > > 21:52:11< pavelm> I was playing with variable scheduling ticks here, > > hoping to save some power. 21:52:31< pavelm> How big power savings > > should I expect? 21:52:48< pavelm> What cpu will benefit most? > > 21:53:04< pavelm> Is there easy way to measure it? > > > > I played with that too on some PPCs and was surprised by the absence > > of benefit, but I might have done something wrong, I need to > > instrument the stuff better. > > Difference between HZ=100 and HZ=1000 was measuerd to be approx. as > big as disk spinnned up vs. spinned down (i.e. watt or so) by > seife.... Not *that* unimportant. But it took month or so to get that > data, because he was basically measuring runtime from full to empty > battery. Have any of these patches been published? I've been playing with variable ticks too, and I would like to see what other people have been doing (as so far, the only thing I've managed to do is commit crimes against nature and the idle loop). Jordan -- Jordan Crouse Senior Linux Engineer AMD - Personal Connectivity Solutions Group --===============87061931891652256== Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline --===============87061931891652256==--