From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753383Ab2I0EYs (ORCPT ); Thu, 27 Sep 2012 00:24:48 -0400 Received: from terminus.zytor.com ([198.137.202.10]:52863 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750747Ab2I0EYr (ORCPT ); Thu, 27 Sep 2012 00:24:47 -0400 Date: Wed, 26 Sep 2012 21:24:14 -0700 From: tip-bot for Stephane Eranian Message-ID: Cc: acme@redhat.com, linux-kernel@vger.kernel.org, eranian@google.com, hpa@zytor.com, mingo@kernel.org, peterz@infradead.org, dsahern@gmail.com, tglx@linutronix.de, mingo@elte.hu Reply-To: mingo@kernel.org, hpa@zytor.com, eranian@google.com, linux-kernel@vger.kernel.org, acme@redhat.com, peterz@infradead.org, dsahern@gmail.com, tglx@linutronix.de, mingo@elte.hu In-Reply-To: <20120920161945.GA7064@quad> References: <20120920161945.GA7064@quad> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf record: Print event causing perf_event_open() to fail Git-Commit-ID: 1863fbbb781b1129da0cfdad46ef875370a34117 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.6 (terminus.zytor.com [127.0.0.1]); Wed, 26 Sep 2012 21:24:20 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 1863fbbb781b1129da0cfdad46ef875370a34117 Gitweb: http://git.kernel.org/tip/1863fbbb781b1129da0cfdad46ef875370a34117 Author: Stephane Eranian AuthorDate: Thu, 20 Sep 2012 18:19:45 +0200 Committer: Arnaldo Carvalho de Melo CommitDate: Thu, 20 Sep 2012 14:44:17 -0300 perf record: Print event causing perf_event_open() to fail Got tired of not getting the event that caused the perf_event_open() syscall to fail. So I fixed the error message. This is very useful when monitoring lots of events in a single run. Signed-off-by: Stephane Eranian Cc: David Ahern Cc: Ingo Molnar Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20120920161945.GA7064@quad Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-record.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index c643ed6..2cb7434 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -297,8 +297,10 @@ try_again: } printf("\n"); - error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n", - err, strerror(err)); + error("sys_perf_event_open() syscall returned with %d " + "(%s) for event %s. /bin/dmesg may provide " + "additional information.\n", + err, strerror(err), perf_evsel__name(pos)); #if defined(__i386__) || defined(__x86_64__) if (attr->type == PERF_TYPE_HARDWARE &&