From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frank Rowand Subject: Re: [PATCH RT-TESTS] cyclictest: histogram overflow instance tracking Date: Mon, 22 Oct 2012 18:41:57 -0700 Message-ID: <5085F5E5.3090204@am.sony.com> References: <3BC12164-17B6-4F1A-94F8-A65C2A11BEAD@vmware.com> <5085EFD6.7080500@am.sony.com> Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Cc: Bhavesh Davda , "linux-rt-users@vger.kernel.org" , John Kacur To: "Rowand, Frank" Return-path: Received: from va3ehsobe006.messaging.microsoft.com ([216.32.180.16]:52723 "EHLO va3outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756380Ab2JWBl7 (ORCPT ); Mon, 22 Oct 2012 21:41:59 -0400 In-Reply-To: <5085EFD6.7080500@am.sony.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: On 10/22/12 18:16, Frank Rowand wrote: > On 10/16/12 10:02, Bhavesh Davda wrote: >> From: Bhavesh Davda >> >> Add feature to cyclictest histogram mode to track cycle counts every time a >> sample overflows the histogram limit. This should help identify if there is a >> timing pattern to jitters in cyclictest runs. >> >> Example output (with -h 10): >> ... >> Histogram Overflows: 00001 00007 00000 00009 00004 00007 00000 00001 >> Histogram Overflow at cycle number: >> Thread 0: 09964 >> Thread 1: 00000 00004 00006 00008 00010 09962 11594 >> Thread 2: >> Thread 3: 01169 04698 06782 09033 10299 11561 21517 28734 29532 >> Thread 4: 11574 11580 11583 11586 >> Thread 5: 00020 09448 13954 14954 18954 20587 24973 >> Thread 6: >> Thread 7: 18950 >> ... >> >> Signed-off-by: Bhavesh Davda > > > After the patches survive checkpatch, I'll review and test them. < snip > > /home/frowand/tmp/hist_overflow_xxx_1 has style problems, please review. > > If any of these errors are false positives, please report > them to the maintainer, see CHECKPATCH in MAINTAINERS. Oooooops, the following message was about the series file I would use to apply the patches with quilt. Please ignore it. > ERROR: Does not appear to be a unified-diff format patch > > total: 1 errors, 0 warnings, 0 lines checked -Frank