tracing/selftest: Add selftests to test trace_marker histogram triggers
Add a couple of tests that test the trace_marker histogram triggers.
One does a straight histogram test, the other will create a synthetic event
and test the latency between two different writes (using filters to
differentiate between them).
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-hist.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-hist.tc
new file mode 100644
index 0000000..2acbfe2
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-hist.tc
@@ -0,0 +1,49 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: trace_marker trigger - test histogram trigger
+# flags: instance
+
+do_reset() {
+ reset_trigger
+ echo > set_event
+ clear_trace
+}
+
+fail() { #msg
+ do_reset
+ echo $1
+ exit_fail
+}
+
+if [ ! -f set_event ]; then
+ echo "event tracing is not supported"
+ exit_unsupported
+fi
+
+if [ ! -d events/ftrace/print ]; then
+ echo "event trace_marker is not supported"
+ exit_unsupported
+fi
+
+if [ ! -f events/ftrace/print/trigger ]; then
+ echo "event trigger is not supported"
+ exit_unsupported
+fi
+
+if [ ! -f events/ftrace/print/hist ]; then
+ echo "hist trigger is not supported"
+ exit_unsupported
+fi
+
+do_reset
+
+echo "Test histogram trace_marker tigger"
+
+echo 'hist:keys=common_pid' > events/ftrace/print/trigger
+for i in `seq 1 10` ; do echo "hello" > trace_marker; done
+grep 'hitcount: *10$' events/ftrace/print/hist > /dev/null || \
+ fail "hist trigger did not trigger correct times on trace_marker"
+
+do_reset
+
+exit 0
