summaryrefslogtreecommitdiff
path: root/tools
diff options
context:
space:
mode:
authorMasami Hiramatsu (Google) <mhiramat@kernel.org>2024-05-31 12:43:37 +0300
committerShuah Khan <skhan@linuxfoundation.org>2024-05-31 17:35:43 +0300
commit0f42bdf59b4e428485aa922bef871bfa6cc505e0 (patch)
treeec087b4f2d57357460636c63270c8e59fed8c77c /tools
parentcb708ab9f584f159798b60853edcf0c8b67ce295 (diff)
downloadlinux-0f42bdf59b4e428485aa922bef871bfa6cc505e0.tar.xz
selftests/tracing: Fix event filter test to retry up to 10 times
Commit eb50d0f250e9 ("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: eb50d0f250e9 ("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>
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/ftrace/test.d/filter/event-filter-function.tc20
1 files changed, 19 insertions, 1 deletions
diff --git a/tools/testing/selftests/ftrace/test.d/filter/event-filter-function.tc b/tools/testing/selftests/ftrace/test.d/filter/event-filter-function.tc
index 3f74c09c56b6..118247b8dd84 100644
--- a/tools/testing/selftests/ftrace/test.d/filter/event-filter-function.tc
+++ b/tools/testing/selftests/ftrace/test.d/filter/event-filter-function.tc
@@ -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`