Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965055AbVJ1C11 (ORCPT ); Thu, 27 Oct 2005 22:27:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965057AbVJ1C11 (ORCPT ); Thu, 27 Oct 2005 22:27:27 -0400 Received: from xenotime.net ([66.160.160.81]:34469 "HELO xenotime.net") by vger.kernel.org with SMTP id S965055AbVJ1C11 (ORCPT ); Thu, 27 Oct 2005 22:27:27 -0400 Date: Thu, 27 Oct 2005 19:27:24 -0700 From: "Randy.Dunlap" To: Claudio Scordino Cc: linux-kernel@vger.kernel.org, kernelnewbies@nl.linux.org Subject: Re: The "best" value of HZ Message-Id: <20051027192724.350dcc41.rdunlap@xenotime.net> In-Reply-To: <200510280118.42731.cloud.of.andor@gmail.com> References: <200510280118.42731.cloud.of.andor@gmail.com> Organization: YPO4 X-Mailer: Sylpheed version 1.0.5 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1377 Lines: 34 On Fri, 28 Oct 2005 01:18:41 +0200 Claudio Scordino wrote: > Hi, > > during the last years there has been a lot of discussion about the "best" > value of HZ... On i386 was 100, then became 1000, and finally was set to 250. > I'm thinking to do an evaluation of this parameter using different > architectures. > > Has anybody thought to give the possibility to modify the value of HZ at boot > time instead of at compile time ? This would allow to easily test different > values on different machines and create a table containing the "best" value > for each architecture... At this moment, instead, we have to recompile the > kernel for each different value :( > > Do you think there would be much work to do that ? Not a lot. Could be useful. > Do you think it would be a desired feature the knowledge of the best value for > each architecture with more precision ? In this thread (around 2005-july-14) Subject: Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt there was some interest in that, and the beginnings of a patch. But the dynamic tick patch seems to have sidelined this one. --- ~Randy - 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/