[PATCH v3 14/14] tracing/selftest: Add test to test hist trigger between kernel event and trace_marker

[Steven Rostedt]

From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx>

Add a test that tests a trigger that is initiated by a kernel event
(sched_waking) and compared to a write to the trace_marker.

Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
---
 .../trigger/trigger-trace-marker-synthetic.tc | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-synthetic.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-synthetic.tc
index 3666dd6ab02a..b06996ecd5e0 100644
--- a/tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-synthetic.tc
+++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-synthetic.tc
@@ -31,6 +31,11 @@ if [ ! -d events/ftrace/print ]; then
     exit_unsupported
 fi
 
+if [ ! -d events/sched/sched_waking ]; then
+    echo "event sched_waking is not supported"
+    exit_unsupported
+fi
+
 if [ ! -f events/ftrace/print/trigger ]; then
     echo "event trigger is not supported"
     exit_unsupported
@@ -63,4 +68,21 @@ grep 'hitcount: *1$' events/synthetic/latency/hist > /dev/null || \
 
 do_reset
 
+echo "Test histogram kernel event to trace_marker latency histogram trigger"
+
+echo 'latency u64 lat' > synthetic_events
+echo 'hist:keys=pid:ts0=common_timestamp.usecs' > events/sched/sched_waking/trigger
+echo 'hist:keys=common_pid:lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).latency($lat)' > events/ftrace/print/trigger
+echo 'hist:keys=common_pid,lat:sort=lat' > events/synthetic/latency/trigger
+sleep 1
+echo "hello" > trace_marker
+
+grep 'hitcount: *1$' events/ftrace/print/hist > /dev/null || \
+    fail "hist trigger did not trigger correct times on trace_marker"
+
+grep 'hitcount: *1$' events/synthetic/latency/hist > /dev/null || \
+    fail "hist trigger did not trigger "
+
+do_reset
+
 exit 0
-- 
2.17.0