Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262678AbUKXOJw (ORCPT ); Wed, 24 Nov 2004 09:09:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262726AbUKXOHw (ORCPT ); Wed, 24 Nov 2004 09:07:52 -0500 Received: from zeus.kernel.org ([204.152.189.113]:54735 "EHLO zeus.kernel.org") by vger.kernel.org with ESMTP id S262678AbUKXNn6 (ORCPT ); Wed, 24 Nov 2004 08:43:58 -0500 Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.30-9 From: Steven Rostedt To: Ingo Molnar Cc: Lee Revell , LKML , Rui Nuno Capela , Mark Johnson , "K.R. Foley" , Bill Huey , Adam Heath , Florian Schmidt , Thomas Gleixner , Michal Schmidt , Fernando Pablo Lopez-Lezcano , Karsten Wiese , Gunther Persoons , emann@mrv.com, Shane Shrybman , Amit Shah , Esben Nielsen In-Reply-To: <20041124034520.GA12785@elte.hu> References: <20041111215122.GA5885@elte.hu> <20041116125402.GA9258@elte.hu> <20041116130946.GA11053@elte.hu> <20041116134027.GA13360@elte.hu> <20041117124234.GA25956@elte.hu> <20041118123521.GA29091@elte.hu> <20041118164612.GA17040@elte.hu> <20041122005411.GA19363@elte.hu> <20041123175823.GA8803@elte.hu> <1101257903.13780.15.camel@krustophenia.net> <20041124034520.GA12785@elte.hu> Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: Kihon Technologies Date: Wed, 24 Nov 2004 08:33:24 -0500 Message-Id: <1101303204.32068.26.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1430 Lines: 32 On Wed, 2004-11-24 at 04:45 +0100, Ingo Molnar wrote: > * Lee Revell wrote: > > > > The symptom is that CPU bound tasks like kernel compiles will starve > > I/O bound tasks like evolution for a _long_ time. If I have a kernel > > build and external modules building at the same time and Evolution > > goes to "Update message list...", it can sit and spin with a blank > > message pane for a minute or two. If I suspend the builds, the > > message list renders immediately. > > could you try the vanilla -rc2-mm2 kernel (with PREEMPT enabled), does > it behave in such a way too? At first sight this could be a property of > the upstream scheduler, but maybe it's special to PREEMPT_RT. > Have you notice this behavior with other interactive (I/O) tasks, such as bash. Evolution is quite a big utility, and might be doing something in the background. If you see the same behavior with bash then there is no doubt that the compile is slowing down an I/O intensive task. Another variable can be memory. Are you running this on something with adequate memory, or is you harddrive churning like mad and you're constantly thrashing the swap space? -- Steve - 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/