From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frank Rowand Subject: Re: [PATCH 1/2] RFC cyclictest: clean up --latency ordering in getopt Date: Mon, 7 May 2012 15:00:17 -0700 Message-ID: <4FA845F1.4080205@am.sony.com> References: <4FA841B4.20701@am.sony.com> <4FA842F3.60204@am.sony.com> Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Cc: "linux-rt-users@vger.kernel.org" , "williams@redhat.com" , "jkacur@redhat.com" , "dvhart@linux.intel.com" To: "Rowand, Frank" Return-path: Received: from tx2ehsobe004.messaging.microsoft.com ([65.55.88.14]:15044 "EHLO tx2outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750998Ab2EGWAv (ORCPT ); Mon, 7 May 2012 18:00:51 -0400 In-Reply-To: <4FA842F3.60204@am.sony.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: This is the resulting message on the ARM panda with a 'bad' 32khz timer: # cyclictest -q -p 80 -t -n -l 10 -h ${hist_bins} -R 100 reported clock resolution: 1 nsec measured clock resolution less than: 30517 nsec A possible follow on patch would be to generate a hard error (fail the test) if the measured resolution was above some unreasonable value (perhaps > 1 msec), but allow the hard fail to be overridden with yet another command line option. Any opinions about that? -Frank