From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753509AbbC0UNa (ORCPT ); Fri, 27 Mar 2015 16:13:30 -0400 Received: from mail-ie0-f173.google.com ([209.85.223.173]:36524 "EHLO mail-ie0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752198AbbC0UN1 (ORCPT ); Fri, 27 Mar 2015 16:13:27 -0400 Message-ID: <5515B9E6.5020007@gmail.com> Date: Fri, 27 Mar 2015 14:13:26 -0600 From: David Ahern User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 MIME-Version: 1.0 To: Arnaldo Carvalho de Melo CC: Jiri Olsa , Namhyung Kim , Stephane Eranian , LKML Subject: Re: [BUG] segfault in perf-top -- thread refcnt References: <551593EA.2030201@gmail.com> <20150327201126.GM21510@kernel.org> In-Reply-To: <20150327201126.GM21510@kernel.org> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/27/15 2:11 PM, Arnaldo Carvalho de Melo wrote: > Em Fri, Mar 27, 2015 at 11:31:22AM -0600, David Ahern escreveu: >> >Hi Arnaldo: >> > >> >If I leave 'perf top -z' running it eventually crashes with the backtrace in >> >the new thread refcnt code: > Humm, tried here with: > > perf top -d 1 -z > > I.e. as you, with the --tui, and also with --stdio, so far couldn't > reproduce. > 2 things: 1. let run for a long time. go about using the server. do lots of builds, etc. it takes time 2. use a box with a LOT of cpus (1024 in my case) Make sure ulimit is set to get the core.