[PATCH v8 12/22] tracing: Add hist trigger onchange() handler test case
From: Tom Zanussi <zanussi@kernel.org>
Date: 2018-12-11 00:02:09
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Subsystem:
kernel selftest framework, the rest, tracing · Maintainers:
Shuah Khan, Linus Torvalds, Steven Rostedt, Masami Hiramatsu
From: Tom Zanussi <redacted> Add a test case verifying the basic functionality of the hist:onchange($var) handler. Signed-off-by: Tom Zanussi <redacted> --- .../inter-event/trigger-onchange-action-hist.tc | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-onchange-action-hist.tc
diff --git a/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-onchange-action-hist.tc b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-onchange-action-hist.tc
new file mode 100644
index 000000000000..064a284e4e75
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-onchange-action-hist.tc@@ -0,0 +1,28 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: event trigger - test inter-event histogram trigger onchange action + +fail() { #msg + echo $1 + exit_fail +} + +if [ ! -f set_event ]; then + echo "event tracing is not supported" + exit_unsupported +fi + +grep -q "onchange(var)" README || exit_unsupported # version issue + +echo "Test onchange action" + +echo 'hist:keys=comm:newprio=prio:onchange($newprio).save(comm,prio) if comm=="ping"' >> /sys/kernel/debug/tracing/events/sched/sched_waking/trigger + +ping $LOCALHOST -c 3 +nice -n 1 ping $LOCALHOST -c 3 + +if ! grep -q "changed:" events/sched/sched_waking/hist; then + fail "Failed to create onchange action inter-event histogram" +fi + +exit 0
--
2.14.1