From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Richter Subject: [PATCH] perf test: Fix test 21 for s390x Date: Fri, 24 Nov 2017 10:43:12 +0100 Message-ID: <20171124094312.55024-1-tmricht@linux.vnet.ibm.com> Return-path: Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:36858 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752600AbdKXJnd (ORCPT ); Fri, 24 Nov 2017 04:43:33 -0500 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id vAO9fhmx032821 for ; Fri, 24 Nov 2017 04:43:32 -0500 Received: from e06smtp11.uk.ibm.com (e06smtp11.uk.ibm.com [195.75.94.107]) by mx0a-001b2d01.pphosted.com with ESMTP id 2eeex6nx4m-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 24 Nov 2017 04:43:31 -0500 Received: from localhost by e06smtp11.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 24 Nov 2017 09:43:29 -0000 Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, acme@kernel.org Cc: brueckner@linux.vnet.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, Thomas Richter Test case 21 (Number of exit events of a simple workload) fails on s390x. The reason is the invalid sample frequency supplied for this test. On s390x the minimum sample frequency is much higher (see output of /proc/service_levels: [root@s35lp76 linux-devel]# cat /proc/service_levels CPU-MF: Counter facility: version=3.5 authorization=002f CPU-MF: Sampling facility: min_rate=18228 max_rate=170650536 cpu_speed=5208 ... [root@s35lp76 linux-devel]# ). Supply a save sample frequency value for s390x to fix this. The value will be adjusted by the s390x CPUMF frequency convertion function to a value well below the sysctl kernel.perf_event_max_sample_rate value. Signed-off-by: Thomas Richter Reviewed-by: Hendrik Brueckner --- tools/perf/tests/task-exit.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c index bc4a7344e274..1073670dd1f2 100644 --- a/tools/perf/tests/task-exit.c +++ b/tools/perf/tests/task-exit.c @@ -84,7 +84,11 @@ int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused evsel = perf_evlist__first(evlist); evsel->attr.task = 1; +#ifdef __s390x__ + evsel->attr.sample_freq = 1000000; +#else evsel->attr.sample_freq = 1; +#endif evsel->attr.inherit = 0; evsel->attr.watermark = 0; evsel->attr.wakeup_events = 1; -- 2.13.4