From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265051AbUGZInS (ORCPT ); Mon, 26 Jul 2004 04:43:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265053AbUGZInS (ORCPT ); Mon, 26 Jul 2004 04:43:18 -0400 Received: from grendel.digitalservice.pl ([217.67.200.140]:35005 "HELO mail.digitalservice.pl") by vger.kernel.org with SMTP id S265051AbUGZInM (ORCPT ); Mon, 26 Jul 2004 04:43:12 -0400 From: "R. J. Wysocki" Organization: SiSK To: Con Kolivas Subject: Re: Autotune swappiness01 Date: Mon, 26 Jul 2004 10:52:49 +0200 User-Agent: KMail/1.5 Cc: Andrew Morton , linux-kernel@vger.kernel.org References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200407261052.50178.rjwysocki@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Monday 26 of July 2004 03:09, Con Kolivas wrote: > Con Kolivas writes: > > Andrew Morton writes: > >> Seriously, we've seen placebo effects before... > > > > I am in full agreement there... It's easy to see that applications do not > > swap out overnight; but i'm having difficulty trying to find a way to > > demonstrate the other part. I guess timing the "linking the kernel with > > full debug" on a low memory box is measurable. > > I should have said - finding a swappiness that ensures not swapping out > applications with updatedb, then using that same swappiness value to do the > linking test. Please excuse me, but is that viable at all? IMHO, it's just like trying to tune a radio including volume with only one knob. I don't say it won't work, but the probability that it will is rather small, it seems ... rjw -- Rafael J. Wysocki [tel. (+48) 605 053 693] ---------------------------- For a successful technology, reality must take precedence over public relations, for nature cannot be fooled. -- Richard P. Feynman