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selftests/tracing: Fix event filter test to retry up to 10 times
[ Upstream commit0f42bdf59b
] Commiteb50d0f250
("selftests/ftrace: Choose target function for filter test from samples") choose the target function from samples, but sometimes this test failes randomly because the target function does not hit at the next time. So retry getting samples up to 10 times. Fixes:eb50d0f250
("selftests/ftrace: Choose target function for filter test from samples") Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 19 additions and 1 deletions
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@ -10,7 +10,6 @@ fail() { #msg
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}
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sample_events() {
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echo > trace
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echo 1 > events/kmem/kmem_cache_free/enable
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echo 1 > tracing_on
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ls > /dev/null
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@ -22,6 +21,7 @@ echo 0 > tracing_on
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echo 0 > events/enable
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echo "Get the most frequently calling function"
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echo > trace
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sample_events
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target_func=`cat trace | grep -o 'call_site=\([^+]*\)' | sed 's/call_site=//' | sort | uniq -c | sort | tail -n 1 | sed 's/^[ 0-9]*//'`
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@ -32,7 +32,16 @@ echo > trace
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echo "Test event filter function name"
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echo "call_site.function == $target_func" > events/kmem/kmem_cache_free/filter
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sample_events
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max_retry=10
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while [ `grep kmem_cache_free trace| wc -l` -eq 0 ]; do
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sample_events
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max_retry=$((max_retry - 1))
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if [ $max_retry -eq 0 ]; then
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exit_fail
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fi
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done
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hitcnt=`grep kmem_cache_free trace| grep $target_func | wc -l`
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misscnt=`grep kmem_cache_free trace| grep -v $target_func | wc -l`
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@ -49,7 +58,16 @@ address=`grep " ${target_func}\$" /proc/kallsyms | cut -d' ' -f1`
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echo "Test event filter function address"
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echo "call_site.function == 0x$address" > events/kmem/kmem_cache_free/filter
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echo > trace
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sample_events
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max_retry=10
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while [ `grep kmem_cache_free trace| wc -l` -eq 0 ]; do
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sample_events
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max_retry=$((max_retry - 1))
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if [ $max_retry -eq 0 ]; then
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exit_fail
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fi
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done
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hitcnt=`grep kmem_cache_free trace| grep $target_func | wc -l`
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misscnt=`grep kmem_cache_free trace| grep -v $target_func | wc -l`
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