Re: [PATCH] selftests/ftrace: Limit length in subsystem-enable tests
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2024-02-05 13:21:26
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On Mon, 5 Feb 2024 21:12:33 +0800 Yuanhe Shu [off-list ref] wrote:
While sched* events being traced and sched* events continuously happen, "[xx] event tracing - enable/disable with subsystem level files" would never stop as it cat an endless output. Select the first 100 lines of output would be enough to judge whether there are more than 3 types of sched events.
It's not that it never stops but on some slower systems it does seem to take forever. Acked-by: Steven Rostedt (Google) <redacted> Shuah, Can you take this through your tree? Thanks, -- Steve
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Signed-off-by: Yuanhe Shu <redacted> --- .../selftests/ftrace/test.d/event/subsystem-enable.tc | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)diff --git a/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc b/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc index b1ede6249866..74c1114603a7 100644 --- a/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc +++ b/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc@@ -18,7 +18,7 @@ echo 'sched:*' > set_event yield -count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l` +count=`head -n 100 trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l` if [ $count -lt 3 ]; then fail "at least fork, exec and exit events should be recorded" fi@@ -29,7 +29,7 @@ echo 1 > events/sched/enable yield -count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l` +count=`head -n 100 | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l` if [ $count -lt 3 ]; then fail "at least fork, exec and exit events should be recorded" fi@@ -40,7 +40,7 @@ echo 0 > events/sched/enable yield -count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l` +count=`head -n 100 | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l` if [ $count -ne 0 ]; then fail "any of scheduler events should not be recorded" fi