From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261305AbVF1LP6 (ORCPT ); Tue, 28 Jun 2005 07:15:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261308AbVF1LP5 (ORCPT ); Tue, 28 Jun 2005 07:15:57 -0400 Received: from mx2.elte.hu ([157.181.151.9]:10644 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S261305AbVF1LPw (ORCPT ); Tue, 28 Jun 2005 07:15:52 -0400 Date: Tue, 28 Jun 2005 13:15:21 +0200 From: Ingo Molnar To: William Weston Cc: "K.R. Foley" , linux-kernel@vger.kernel.org, "Eugeny S. Mints" , Daniel Walker Subject: Re: [patch] Real-Time Preemption, -RT-2.6.12-rc6-V0.7.48-00 Message-ID: <20050628111521.GA21767@elte.hu> References: <20050623001023.GC11486@elte.hu> <20050624070639.GB5941@elte.hu> <20050625041453.GC6981@elte.hu> <20050627081542.GA15096@elte.hu> <20050628081053.GC7368@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050628081053.GC7368@elte.hu> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Ingo Molnar wrote: > > Once, with VLC (viewing a 5mbit/s mcast/udp stream) and two burnP6 > > instances running, I was able to fire up top on the serial console and > > found out that the IRQ thread for the ns83820 nic was using 99% of one > > CPU. > > aha! that's an important clue. It seems you've got a screaming interrupt > or some other loop in ns83820 irq handling. [...] i just found and fixed a bug in -RT that could cause screaming interrupts. Could you try the -50-28 (or any later) kernel, does it fix the problem? Ingo