Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751369AbWENHi1 (ORCPT ); Sun, 14 May 2006 03:38:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751370AbWENHi1 (ORCPT ); Sun, 14 May 2006 03:38:27 -0400 Received: from mail.gmx.net ([213.165.64.20]:11186 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S1751369AbWENHi0 (ORCPT ); Sun, 14 May 2006 03:38:26 -0400 X-Authenticated: #14349625 Subject: Re: rt20 scheduling latency testcase and failure data From: Mike Galbraith To: Darren Hart Cc: Lee Revell , lkml , Ingo Molnar , Thomas Gleixner , Steven Rostedt , Florian Schmidt In-Reply-To: <200605140004.30307.dvhltc@us.ibm.com> References: <200605121924.53917.dvhltc@us.ibm.com> <1147578414.7738.11.camel@homer> <1147585718.9372.15.camel@homer> <200605140004.30307.dvhltc@us.ibm.com> Content-Type: text/plain Date: Sun, 14 May 2006 09:38:42 +0200 Message-Id: <1147592323.7564.23.camel@homer> Mime-Version: 1.0 X-Mailer: Evolution 2.4.0 Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 807 Lines: 22 On Sun, 2006-05-14 at 00:04 -0700, Darren Hart wrote: > > > > On Saturday 13 May 2006 11:21, Lee Revell wrote: > > > If you disable printf + fflush in iterations loop, problem goes away? > > Unfortunately not, after disabling the printf and fflush, my very first run > resulted in: Drat. > What is it about this dump that made you suspect the printf? Or was it just > that printing the trace seemed to trigger a failure - so it seemed reasonable > that the process may have been blocked on writing to the console? Yeah, realtime task in D state. -Mike - 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/