From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932405Ab3KLV5N (ORCPT ); Tue, 12 Nov 2013 16:57:13 -0500 Received: from terminus.zytor.com ([198.137.202.10]:40185 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932349Ab3KLV4d (ORCPT ); Tue, 12 Nov 2013 16:56:33 -0500 Date: Tue, 12 Nov 2013 13:55:55 -0800 From: tip-bot for Arnaldo Carvalho de Melo Message-ID: Cc: linux-kernel@vger.kernel.org, eranian@google.com, paulus@samba.org, acme@redhat.com, hpa@zytor.com, mingo@kernel.org, peterz@infradead.org, efault@gmx.de, namhyung@kernel.org, jolsa@redhat.com, fweisbec@gmail.com, adrian.hunter@intel.com, dsahern@gmail.com, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, acme@redhat.com, paulus@samba.org, eranian@google.com, linux-kernel@vger.kernel.org, efault@gmx.de, peterz@infradead.org, namhyung@kernel.org, jolsa@redhat.com, fweisbec@gmail.com, dsahern@gmail.com, adrian.hunter@intel.com, tglx@linutronix.de To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/urgent] perf tests: Use lower sample_freq in sw clock event period test Git-Commit-ID: 67c1e4a53b17894e6a24f95057cc374c4be051cb 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-4.5.1 (terminus.zytor.com [127.0.0.1]); Tue, 12 Nov 2013 13:56:01 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 67c1e4a53b17894e6a24f95057cc374c4be051cb Gitweb: http://git.kernel.org/tip/67c1e4a53b17894e6a24f95057cc374c4be051cb Author: Arnaldo Carvalho de Melo AuthorDate: Mon, 11 Nov 2013 16:33:18 -0300 Committer: Arnaldo Carvalho de Melo CommitDate: Mon, 11 Nov 2013 16:43:34 -0300 perf tests: Use lower sample_freq in sw clock event period test We were using it at 10 kHz, which doesn't work in machines where somehow the max freq was auto reduced by the kernel: [root@ssdandy ~]# perf test 19 19: Test software clock events have valid period values : FAILED! [root@ssdandy ~]# perf test -v 19 19: Test software clock events have valid period values : --- start --- Couldn't open evlist: Invalid argument ---- end ---- Test software clock events have valid period values: FAILED! [root@ssdandy ~]# [root@ssdandy ~]# cat /proc/sys/kernel/perf_event_max_sample_rate 7000 Reducing it to 500 Hz should be good enough for this test and also shouldn't affect what it is testing. But warn the user if it fails, informing the knob and the freq tried. Cc: Adrian Hunter Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-548rhj1uo6xbwnxa95kw3hqe@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/tests/sw-clock.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c index ed77772..93a7139 100644 --- a/tools/perf/tests/sw-clock.c +++ b/tools/perf/tests/sw-clock.c @@ -34,7 +34,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id) .freq = 1, }; - attr.sample_freq = 10000; + attr.sample_freq = 500; evlist = perf_evlist__new(); if (evlist == NULL) { @@ -58,8 +58,11 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id) } if (perf_evlist__open(evlist)) { + const char *knob = "/proc/sys/kernel/perf_event_max_sample_rate"; + err = -errno; - pr_debug("Couldn't open evlist: %s\n", strerror(errno)); + pr_debug("Couldn't open evlist: %s\nHint: check %s, using %" PRIu64 " in this test.\n", + strerror(errno), knob, (u64)attr.sample_freq); goto out_delete_maps; }