lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 24 Nov 2017 10:43:12 +0100 From: Thomas Richter <tmricht@...ux.vnet.ibm.com> To: linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org, acme@...nel.org Cc: brueckner@...ux.vnet.ibm.com, schwidefsky@...ibm.com, heiko.carstens@...ibm.com, Thomas Richter <tmricht@...ux.vnet.ibm.com> Subject: [PATCH] perf test: Fix test 21 for s390x 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@...lp76 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@...lp76 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 <tmricht@...ux.vnet.ibm.com> Reviewed-by: Hendrik Brueckner <brueckner@...ux.vnet.ibm.com> --- 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
Powered by blists - more mailing lists