1#!/bin/sh
2# SPDX-License-Identifier: GPL-2.0
3# description: event trigger - test inter-event histogram trigger snapshot action
4
5fail() { #msg
6    echo $1
7    exit_fail
8}
9
10if [ ! -f set_event ]; then
11    echo "event tracing is not supported"
12    exit_unsupported
13fi
14
15if [ ! -f snapshot ]; then
16    echo "snapshot is not supported"
17    exit_unsupported
18fi
19
20grep -q "onchange(var)" README || exit_unsupported # version issue
21
22grep -q "snapshot()" README || exit_unsupported # version issue
23
24echo "Test snapshot action"
25
26echo 1 > /sys/kernel/debug/tracing/events/sched/enable
27
28echo 'hist:keys=comm:newprio=prio:onchange($newprio).save(comm,prio):onchange($newprio).snapshot() if comm=="ping"' >> /sys/kernel/debug/tracing/events/sched/sched_waking/trigger
29
30ping $LOCALHOST -c 3
31nice -n 1 ping $LOCALHOST -c 3
32
33echo 0 > tracing_on
34
35if ! grep -q "changed:" events/sched/sched_waking/hist; then
36    fail "Failed to create onchange action inter-event histogram"
37fi
38
39if ! grep -q "comm=ping" snapshot; then
40    fail "Failed to create snapshot action inter-event histogram"
41fi
42
43exit 0
44