From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755391Ab3GWHr1 (ORCPT ); Tue, 23 Jul 2013 03:47:27 -0400 Received: from terminus.zytor.com ([198.137.202.10]:56203 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754320Ab3GWHrX (ORCPT ); Tue, 23 Jul 2013 03:47:23 -0400 Date: Tue, 23 Jul 2013 00:46:50 -0700 From: tip-bot for David Ahern Message-ID: Cc: acme@redhat.com, linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, peterz@infradead.org, jolsa@redhat.com, fweisbec@gmail.com, dsahern@gmail.com, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, acme@redhat.com, peterz@infradead.org, jolsa@redhat.com, fweisbec@gmail.com, dsahern@gmail.com, tglx@linutronix.de In-Reply-To: <1374190079-28507-1-git-send-email-dsahern@gmail.com> References: <1374190079-28507-1-git-send-email-dsahern@gmail.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf evsel: Handle ENODEV on default cycles event Git-Commit-ID: 2b821cce1c950cead081d779db0dda680192c4bd 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-4.2.7 (terminus.zytor.com [127.0.0.1]); Tue, 23 Jul 2013 00:46:56 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 2b821cce1c950cead081d779db0dda680192c4bd Gitweb: http://git.kernel.org/tip/2b821cce1c950cead081d779db0dda680192c4bd Author: David Ahern AuthorDate: Thu, 18 Jul 2013 17:27:59 -0600 Committer: Arnaldo Carvalho de Melo CommitDate: Mon, 22 Jul 2013 12:03:57 -0300 perf evsel: Handle ENODEV on default cycles event Some systems (e.g., VMs on qemu-0.13 with the default vcpu model) report an unsupported CPU model: Performance Events: unsupported p6 CPU model 2 no PMU driver, software events only. Subsequent invocations of perf fail with: The sys_perf_event_open() syscall returned with 19 (No such device) for event (cycles). /bin/dmesg may provide additional information. No CONFIG_PERF_EVENTS=y kernel support configured? Add ENODEV to the list of errno's to fallback to cpu-clock. Signed-off-by: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1374190079-28507-1-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/evsel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index a635461..8bed0c1 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1482,7 +1482,7 @@ out: bool perf_evsel__fallback(struct perf_evsel *evsel, int err, char *msg, size_t msgsize) { - if ((err == ENOENT || err == ENXIO) && + if ((err == ENOENT || err == ENXIO || err == ENODEV) && evsel->attr.type == PERF_TYPE_HARDWARE && evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) { /*