Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261298AbUKNNZm (ORCPT ); Sun, 14 Nov 2004 08:25:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261299AbUKNNZm (ORCPT ); Sun, 14 Nov 2004 08:25:42 -0500 Received: from mail8.spymac.net ([195.225.149.8]:36563 "EHLO mail8") by vger.kernel.org with ESMTP id S261298AbUKNNZg (ORCPT ); Sun, 14 Nov 2004 08:25:36 -0500 Message-ID: <41976AE0.5090903@spymac.com> Date: Sun, 14 Nov 2004 15:25:36 +0100 From: Gunther Persoons User-Agent: Mozilla Thunderbird 0.9 (X11/20041113) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Ingo Molnar , linux-kernel@vger.kernel.org Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.25-1 References: <20041103105840.GA3992@elte.hu> <20041106155720.GA14950@elte.hu> <20041108091619.GA9897@elte.hu> <20041108165718.GA7741@elte.hu> <20041109160544.GA28242@elte.hu> <20041111144414.GA8881@elte.hu> <20041111215122.GA5885@elte.hu> <41951380.2080801@spymac.com> <20041112201936.GA15133@elte.hu> <41961C03.10607@spymac.com> <20041114124932.GB11042@elte.hu> In-Reply-To: <20041114124932.GB11042@elte.hu> X-Enigmail-Version: 0.86.0.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1263 Lines: 33 Ingo Molnar wrote: >* Gunther Persoons wrote: > > > >>As i thought the init scripts were my problem. But i have an other >>question. I recently started to use NFS. But with the mainline kernel >>cpu usage is 100%, and when i look in top si shows bewteen 40 and 60% >>cpu usage. With your kernel si is 0%, but ksoftriqd/0 shows around 38% >>cpu usage and total cpu usage is around 52%. Is this normal? on my >>server cpu usage is 2% but it uses a intel network card. My laptop is >>using a wireless pcmcia card (cisco). >> >> > >normally the RT kernel has higher system overhead (all IRQ traffic goes >to separate thread contexts, involving context-switching, etc.) so a >_reduction_ in system overhead looks a bit strange. Is there a >difference in performance? > > Ingo > > > With the mainline kernel i get speeds around 600-700kb/s and with the RT kernel i get speeds around 550kb/s. No other differnces except the cpu usage and that the RT kernel feels much more responsive. - 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/