From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: Re: Perf record premature termination Date: Tue, 12 Feb 2013 10:16:21 -0700 Message-ID: <511A78E5.8000909@gmail.com> References: <1360608612.17632.193.camel@schen9-DESK> <511947CB.5010600@gmail.com> <1360620940.17632.194.camel@schen9-DESK> <51197120.7030207@gmail.com> <1360688851.17632.195.camel@schen9-DESK> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pa0-f53.google.com ([209.85.220.53]:38383 "EHLO mail-pa0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932915Ab3BLRQ0 (ORCPT ); Tue, 12 Feb 2013 12:16:26 -0500 Received: by mail-pa0-f53.google.com with SMTP id bg4so189992pad.40 for ; Tue, 12 Feb 2013 09:16:25 -0800 (PST) In-Reply-To: <1360688851.17632.195.camel@schen9-DESK> Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: Tim Chen Cc: Arnaldo Carvalho de Melo , Frederic Weisbecker , Ingo Molnar , Peter Zijlstra , linux-perf-users@vger.kernel.org, ak On 2/12/13 10:07 AM, Tim Chen wrote: > On Mon, 2013-02-11 at 15:30 -0700, David Ahern wrote: >> On 2/11/13 3:15 PM, Tim Chen wrote: >>> On Mon, 2013-02-11 at 12:34 -0700, David Ahern wrote: >>>> On 2/11/13 11:50 AM, Tim Chen wrote: >>>>> David, >>>>> >>>>> When I am doing a profiling of kernel compile with 32 threads on a 4 >>>>> socket westmere machine, I found that perf record terminated right away >>>>> for the version of perf in 3.7 kernel source tree. >>>>> There's no profile data recroded and the compile is running in >>>>> background. >>>>> >>>>> $ make -j32 & >>>>> then >>>>> $ sudo /test/perf record -a -g -f sleep 5 >>>>> sleep: Terminated >> >> This is the more appropriate fix. Make mmap consistent with comm. Revert >> the other one. > > Thanks. Works for me. > > Tim > BTW, this does not seem to be a problem with 3.8 - at least I could not reproduce it. So it seems limited to 3.7 kernels only. David