From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Schwebel Subject: Re: High latencies on MPC5200 with patch-2.6.24-rc5-rt1 Date: Wed, 9 Jan 2008 10:03:45 +0100 Message-ID: <20080109090345.GG3177@pengutronix.de> References: <47834CB7.1030102@grandegger.com> <20080108154947.GB3177@pengutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Cc: Thomas Gleixner , linux-rt-users@vger.kernel.org To: Wolfgang Grandegger Return-path: Received: from metis.extern.pengutronix.de ([83.236.181.26]:32800 "EHLO metis.extern.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753057AbYAIJiY (ORCPT ); Wed, 9 Jan 2008 04:38:24 -0500 Content-Disposition: inline In-Reply-To: <20080108154947.GB3177@pengutronix.de> Sender: linux-rt-users-owner@vger.kernel.org List-ID: On Tue, Jan 08, 2008 at 04:49:47PM +0100, Robert Schwebel wrote: > This is on an idle system: I've quickly ported the patch stack to 2.6.24-rc5-rt1, and it doesn't really work: ----------8<---------- root@phyCORE-MPC5200B-tiny:~ cyclictest -n -p80 -t1 -i10000 -l 1000 0.44 0.35 0.15 1/44 483 T: 0 ( 483) P:80 I: 10000 C: 992 Min: -490034 Act: -410032 Avg: -243020 Max: -10 ----------8<---------- Even on an idle system I get negative values and a "running" Act value. I'll have to clean up the patch stack and check what's going on. Robert -- Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry Handelsregister: Amtsgericht Hildesheim, HRA 2686 Hannoversche Str. 2, 31134 Hildesheim, Germany Phone: +49-5121-206917-0 | Fax: +49-5121-206917-9