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

#!/bin/sh
# description: event trigger - test inter-event combined histogram trigger

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

reset_tracer
do_reset
clear_synthetic_events

echo "Test create synthetic event"

echo 'waking_latency  u64 lat pid_t pid' > synthetic_events
if [ ! -d events/synthetic/waking_latency ]; then
    fail "Failed to create waking_latency synthetic event"
fi

echo "Test combined histogram"

echo 'hist:keys=pid:ts0=common_timestamp.usecs if comm=="ping"' > events/sched/sched_waking/trigger
echo 'hist:keys=pid:waking_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).waking_latency($waking_lat,pid) if comm=="ping"' > events/sched/sched_wakeup/trigger
echo 'hist:keys=pid,lat:sort=pid,lat' > events/synthetic/waking_latency/trigger

echo 'wakeup_latency u64 lat pid_t pid' >> synthetic_events
echo 'hist:keys=pid:ts1=common_timestamp.usecs if comm=="ping"' >> events/sched/sched_wakeup/trigger
echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts1:onmatch(sched.sched_wakeup).wakeup_latency($wakeup_lat,next_pid) if next_comm=="ping"' > events/sched/sched_switch/trigger

echo 'waking+wakeup_latency u64 lat; pid_t pid' >> synthetic_events
echo 'hist:keys=pid,lat:sort=pid,lat:ww_lat=$waking_lat+$wakeup_lat:onmatch(synthetic.wakeup_latency).waking+wakeup_latency($ww_lat,pid)' >> events/synthetic/wakeup_latency/trigger
echo 'hist:keys=pid,lat:sort=pid,lat' >> events/synthetic/waking+wakeup_latency/trigger

ping localhost -c 3
if ! grep -q "pid:" events/synthetic/waking+wakeup_latency/hist; then
    fail "Failed to create combined histogram"
fi

do_reset

exit 0