Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757869Ab0DGKjP (ORCPT ); Wed, 7 Apr 2010 06:39:15 -0400 Received: from casper.infradead.org ([85.118.1.10]:34753 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757730Ab0DGKjJ (ORCPT ); Wed, 7 Apr 2010 06:39:09 -0400 Date: Wed, 7 Apr 2010 07:38:55 -0300 From: Arnaldo Carvalho de Melo To: Hitoshi Mitake Cc: Ingo Molnar , Paul Mackerras , Frederic Weisbecker , LKML Subject: Re: Floating point exception by perf record Message-ID: <20100407103855.GC3908@ghostprotocols.net> References: <4BB84991.5080301@dcl.info.waseda.ac.jp> <20100405183127.GA3677@ghostprotocols.net> <4BBC4318.1070702@dcl.info.waseda.ac.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4BBC4318.1070702@dcl.info.waseda.ac.jp> X-Url: http://acmel.wordpress.com User-Agent: Mutt/1.5.20 (2009-08-17) X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1482 Lines: 43 Em Wed, Apr 07, 2010 at 05:32:24PM +0900, Hitoshi Mitake escreveu: > On 04/06/10 03:31, Arnaldo Carvalho de Melo wrote: > > Em Sun, Apr 04, 2010 at 05:10:57PM +0900, Hitoshi Mitake escreveu: > > [root@doppio ~]# perf lock report | head -3 > > Warning: Error: expected 'data' but read 'overwrite' > > ID Name acquired contended > total wait (ns) max wait (ns) min wait (ns) > > > > 0xffff8800029d4b28&q->lock 0 0 0 > 0 0 > > [root@doppio ~]# > > > > My system details: > > > > [root@doppio ~]# uname -a > > Linux doppio.ghostprotocols.net 2.6.34-rc3-tip+ #1 SMP Mon Apr 5 > 13:49:42 BRT 2010 x86_64 x86_64 x86_64 GNU/Linux > > [root@doppio ~]# rpm -q newt > > newt-0.52.10-4.fc11.x86_64 > > [root@doppio ~]# > > > > No segfaults here :-\ > > > > - Arnaldo > > > > I tested perf lock trace and got a similar error (but different). > % sudo ./perf lock trace > Fatal: reading input file (size expected=3 received=0) > It seems that perf.data is broken :( I'll search the cause. Take a look at: http://git.kernel.org/?p=linux/kernel/git/acme/linux-2.6.git;a=summary "perf" branch, there is at least one fix there, the "overwrite" one. - Arnaldo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/