From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758008Ab1ANRAf (ORCPT ); Fri, 14 Jan 2011 12:00:35 -0500 Received: from cantor.suse.de ([195.135.220.2]:47834 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757177Ab1ANRAV (ORCPT ); Fri, 14 Jan 2011 12:00:21 -0500 From: Thomas Renninger Organization: SUSE Products GmbH To: David Ahern Subject: Re: perf timechart broken Date: Fri, 14 Jan 2011 18:00:18 +0100 User-Agent: KMail/1.13.5 (Linux/2.6.36-18-desktop; KDE/4.5.3; x86_64; ; ) Cc: Frederic Weisbecker , Arnaldo Carvalho de Melo , Ingo Molnar , linux-perf-users@vger.kernel.org, LKML References: <201101071104.37576.trenn@suse.de> <201101110955.37560.trenn@suse.de> <4D2CA7D6.2070203@cisco.com> In-Reply-To: <4D2CA7D6.2070203@cisco.com> MIME-Version: 1.0 X-Length: 2732 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201101141800.18913.trenn@suse.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday 11 January 2011 19:56:22 David Ahern wrote: > > On 01/11/11 01:55, Thomas Renninger wrote: > > On Tuesday 11 January 2011 02:36:28 Frederic Weisbecker wrote: > >> On Fri, Jan 07, 2011 at 11:04:37AM +0100, Thomas Renninger wrote: > >>> Hi, > >>> > >>> Latest x86 tip has another perf timechart issue introduce > >>> by latest commits. > >>> > >>> ./perf timechart > >>> gives me: > >>> "no trace data in the file" > >>> > >>> I reverted the latest changes and things seem to break > >>> between d854861c4292a4e675a5d3bfd862c5f7421c81e8 > >>> and > >>> 69aad6f1ee69546dea8535ab8f3da9f445d57328 > >>> (linux-2.6-x86 tree ids) > >>> > >>> Be aware that ./perf timechart is currently broken > >>> and segfaults on idle events (in 2.6.36 and 2.6.37). > >> > >> You mean .36 perf tools faults on .37 kernel? or the opposite? > >> Is it because power_idle events weren't present on old tools? > >> Do you have a pointer to those patches? > > perf timechart > > will segfault if perf.data has power_{start,end} events included > > on 2.6.36 and 2.6.37 kernels. > > Is this the same segfault you are seeing? > > http://www.mail-archive.com/linux-perf- users@vger.kernel.org/msg00057.html Looks slightly different, the segfault should happen in: process_sample_event But looks very much related, possibly it has not been made/make with DEBUG=1 and -O6 was added and the backtrace is not 100% correct? I still did not have time to send it out, will do so on Mo. Thomas