From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 20 Sep 2001 22:14:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 20 Sep 2001 22:14:03 -0400 Received: from mailg.telia.com ([194.22.194.26]:51399 "EHLO mailg.telia.com") by vger.kernel.org with ESMTP id ; Thu, 20 Sep 2001 22:13:54 -0400 Message-Id: <200109210214.f8L2E8R27561@mailg.telia.com> Content-Type: text/plain; charset="iso-8859-1" From: Roger Larsson To: Alan Cox Subject: Re: [PATCH] Preemption Latency Measurement Tool Date: Fri, 21 Sep 2001 04:08:14 +0200 X-Mailer: KMail [version 1.3.1] Cc: oxymoron@waste.org (Oliver Xymoron), Dieter.Nuetzel@hamburg.de (Dieter =?iso-8859-1?q?N=FCtzel?=), stefan@space.twc.de (Stefan Westerfeld), rml@tech9.net (Robert Love), linux-kernel@vger.kernel.org (linux-kernel) In-Reply-To: <200109210143.f8L1hnm08604@mailb.telia.com> <200109210157.f8L1vwm15951@mailb.telia.com> In-Reply-To: <200109210157.f8L1vwm15951@mailb.telia.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Continuing to follow up to myself... > > > > Hmm.. > > > > The yield we do in __alloc_pages is it really correct? > > 1. Suppose it is not we that are the problem. > > 2. Suppose there are lots of other processes that gets to run. > > 3. If kswapd had higher prio, it would start to run without us giving > > up... > > > > I have to try... > > They were already gone in -pre12! > But I was running -pre10... > Others? > Dieter is running -pre12... > I will test it anyways... > Unexpected result, but interesting. Things got MUCH WORSE! >>From nearly no problem to hardly enjoyable. (pre10 with preemptive kernel but no schedule in __alloc_pages, actual if statement removed) Maybe it is closer to what Dieter gets... /RogerL -- Roger Larsson Skellefteċ Sweden