From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755341Ab1JCKXI (ORCPT ); Mon, 3 Oct 2011 06:23:08 -0400 Received: from mx1.redhat.com ([209.132.183.28]:61409 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755178Ab1JCKW5 (ORCPT ); Mon, 3 Oct 2011 06:22:57 -0400 Date: Mon, 3 Oct 2011 12:22:35 +0200 From: Jiri Olsa To: Arnaldo Carvalho de Melo Cc: a.p.zijlstra@chello.nl, mingo@elte.hu, paulus@samba.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] perf tools: Exit recording if events have non matching sample type Message-ID: <20111003102235.GB1838@jolsa.redhat.com> References: <1317312068-10411-1-git-send-email-jolsa@redhat.com> <20110929220548.GA17597@ghostprotocols.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110929220548.GA17597@ghostprotocols.net> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 29, 2011 at 07:05:48PM -0300, Arnaldo Carvalho de Melo wrote: > Em Thu, Sep 29, 2011 at 06:01:08PM +0200, Jiri Olsa escreveu: > > The event processing relies on all events having the same sample_type. > > > > This is being checked when the session is being opened read only. > > It also needs to be checked when we do record, since events could be > > read during processing build IDs at the end of the record command. > > > > If we process events with different sample_type the processing might > > skip some events or hang. > > > > Following command hangs on my setup: > > ./perf record -o perf.data -e ext4:ext4_mb_new_group_pa \ > > -e LLC-loads -- date '+%F' > > > > because hardware and tracepoint events have different sample type. > > > > With the patch applied the record command displays > > "Non matching sample_type" message and exits. > > That is way too cryptic :-\ > > What is that makes the sample type not match in this case? Can we make > it match instead? > > This is something to be properly fixed by _allowing_ non matching sample > types, the evsel/evlist abstractions are getting we close but not there > yet, multiple files in a perf.data/ directory are needed. > > Till then can you check if we can make it match or else just say that > the mix of events is not yet supported, please collect them in different > sessions or something along those lines? > > - Arnaldo hi, thanks for comments.. I just was this got in the tip tree git://tesla.tglx.de/git/linux-2.6-tip perf tools: Exit record if events have non matching sample type commit 6f9a4869e15de8af2fd715af876bc3e6b00757a7 Author: Jiri Olsa Date: Thu Sep 29 19:49:50 2011 +0200 I've read the email trail.. I'll check the sources and try to come up with something.. ;) thanks, jirka