Commit 0f42bdf5 authored by Masami Hiramatsu (Google)'s avatar Masami Hiramatsu (Google) Committed by Shuah Khan
Browse files

selftests/tracing: Fix event filter test to retry up to 10 times 



Commit eb50d0f2 ("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: eb50d0f2 ("selftests/ftrace: Choose target function for filter test from samples")
Signed-off-by: default avatarMasami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: default avatarShuah Khan <skhan@linuxfoundation.org>
parent cb708ab9

tools/testing/selftests/ftrace/test.d/filter/event-filter-function.tc

+19 −1
Original line number Diff line number Diff line
@@ -10,7 +10,6 @@ fail() { #msg 
}



sample_events() {

    echo > trace

    echo 1 > events/kmem/kmem_cache_free/enable

    echo 1 > tracing_on

    ls > /dev/null
@@ -22,6 +21,7 @@ echo 0 > tracing_on 
echo 0 > events/enable



echo "Get the most frequently calling function"

echo > trace

sample_events



target_func=`cat trace | grep -o 'call_site=\([^+]*\)' | sed 's/call_site=//' | sort | uniq -c | sort | tail -n 1 | sed 's/^[ 0-9]*//'`
@@ -32,7 +32,16 @@ echo > trace 


echo "Test event filter function name"

echo "call_site.function == $target_func" > events/kmem/kmem_cache_free/filter



sample_events

max_retry=10

while [ `grep kmem_cache_free trace| wc -l` -eq 0 ]; do

sample_events

max_retry=$((max_retry - 1))

if [ $max_retry -eq 0 ]; then

	exit_fail

fi

done



hitcnt=`grep kmem_cache_free trace| grep $target_func | wc -l`

misscnt=`grep kmem_cache_free trace| grep -v $target_func | wc -l`
@@ -49,7 +58,16 @@ address=`grep " ${target_func}\$" /proc/kallsyms | cut -d' ' -f1` 


echo "Test event filter function address"

echo "call_site.function == 0x$address" > events/kmem/kmem_cache_free/filter

echo > trace

sample_events

max_retry=10

while [ `grep kmem_cache_free trace| wc -l` -eq 0 ]; do

sample_events

max_retry=$((max_retry - 1))

if [ $max_retry -eq 0 ]; then

	exit_fail

fi

done



hitcnt=`grep kmem_cache_free trace| grep $target_func | wc -l`

misscnt=`grep kmem_cache_free trace| grep -v $target_func | wc -l`