| From ecd45afecaf2ee3d5b234854f337284af79dfda4 Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Wed, 23 Jun 2021 15:43:15 +0200 |
| Subject: selftests/ftrace: fix event-no-pid on 1-core machine |
| |
| From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> |
| |
| [ Upstream commit 07b60713b57a8f952d029a2b6849d003d9c16108 ] |
| |
| When running event-no-pid test on small machines (e.g. cloud 1-core |
| instance), other events might not happen: |
| |
| + cat trace |
| + cnt=0 |
| + [ 0 -eq 0 ] |
| + fail No other events were recorded |
| [15] event tracing - restricts events based on pid notrace filtering [FAIL] |
| |
| Schedule a simple sleep task to be sure that some other process events |
| get recorded. |
| |
| Fixes: ebed9628f5c2 ("selftests/ftrace: Add test to test new set_event_notrace_pid file") |
| Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> |
| Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
| Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| .../testing/selftests/ftrace/test.d/event/event-no-pid.tc | 7 +++++++ |
| 1 file changed, 7 insertions(+) |
| |
| diff --git a/tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc b/tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc |
| index e6eb78f0b954..9933ed24f901 100644 |
| --- a/tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc |
| +++ b/tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc |
| @@ -57,6 +57,10 @@ enable_events() { |
| echo 1 > tracing_on |
| } |
| |
| +other_task() { |
| + sleep .001 || usleep 1 || sleep 1 |
| +} |
| + |
| echo 0 > options/event-fork |
| |
| do_reset |
| @@ -94,6 +98,9 @@ child=$! |
| echo "child = $child" |
| wait $child |
| |
| +# Be sure some other events will happen for small systems (e.g. 1 core) |
| +other_task |
| + |
| echo 0 > tracing_on |
| |
| cnt=`count_pid $mypid` |
| -- |
| 2.30.2 |
| |
