tracing: Add hist trigger onchange() handler test case (6f6eaa1e) · Commits · 戴 / test

Add a test case verifying the basic functionality of the hist:onchange($var) handler. Link: http://lkml.kernel.org/r/bec87aa8ed7d81794510b3d465096a750c71fce7.1550100284.git.tom.zanussi@linux.intel.com Signed-off-by:

tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-onchange-action-hist.tc

0 → 100644

+28 −0

Original line number	Diff line number	Diff line
		#!/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