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#!/bin/sh
# description: event trigger - test inter-event histogram trigger onmatch-onmax action
do_reset() {
reset_trigger
echo > set_event
clear_trace
}
fail() { #msg
do_reset
echo $1
exit_fail
}
if [ ! -f set_event ]; then
echo "event tracing is not supported"
exit_unsupported
fi
if [ ! -f synthetic_events ]; then
echo "synthetic event is not supported"
exit_unsupported
fi
clear_synthetic_events
reset_tracer
do_reset
echo "Test create synthetic event"
echo 'wakeup_latency u64 lat pid_t pid char comm[16]' > synthetic_events
if [ ! -d events/synthetic/wakeup_latency ]; then
fail "Failed to create wakeup_latency synthetic event"
fi
echo "Test create histogram for synthetic event"
echo "Test histogram variables,simple expression support and onmatch-onmax action"
echo 'hist:keys=pid:ts0=common_timestamp.usecs if comm=="ping"' > events/sched/sched_wakeup/trigger
echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_wakeup).wakeup_latency($wakeup_lat,next_pid,next_comm):onmax($wakeup_lat).save(next_comm,prev_pid,prev_prio,prev_comm) if next_comm=="ping"' >> events/sched/sched_switch/trigger
echo 'hist:keys=comm,pid,lat:wakeup_lat=lat:sort=lat' > events/synthetic/wakeup_latency/trigger
ping localhost -c 5
if [ ! grep -q "ping" events/synthetic/wakeup_latency/hist -o ! grep -q "max:" events/sched/sched_switch/hist]; then
fail "Failed to create onmatch-onmax action inter-event histogram"
fi
do_reset
exit 0
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