From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Phil K." Subject: Problems with cyclictest and ps Date: Wed, 05 Dec 2007 21:34:24 +0100 Message-ID: <47570B50.9060502@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit To: linux-rt-users@vger.kernel.org Return-path: Received: from mu-out-0910.google.com ([209.85.134.185]:27684 "EHLO mu-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751125AbXLEUgv (ORCPT ); Wed, 5 Dec 2007 15:36:51 -0500 Received: by mu-out-0910.google.com with SMTP id i10so1222053mue for ; Wed, 05 Dec 2007 12:36:45 -0800 (PST) Sender: linux-rt-users-owner@vger.kernel.org List-ID: Hi, I tried cyclictest under Debian Lenny with Kernel-2.6.23.8-hrt3 and Kernel-2.6.22 as user root. As decribed on the cyclictest-wikipage all cyclictest-tasks run with the scheduler class SCHED_FIFO. I controlled the scheduler class with "ps -ce" and ps showed me SCHED_OTHER for the cyclictest-task. #> ./cyclictest -t 1 -p 80 -n -i 10000 #> ps -ce | grep cyclic PID CLS PRI TTY TIME CMD 9693 TS 19 pts/5 00:00:00 cyclictest I am wondering why cyclictest runs as SCHED_OTHER I expected SCHED_FIFO instead. Any explanations of this behavior are welcome. Regards, Phil