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tracing: Add alternative synthetic event trace action test case

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Add a test case for the alternative trace(<synthetic_event, params)
synthetic event generation syntax.

Link: http://lkml.kernel.org/r/0616d18423ab1dfdbf333bce9c92ac4fa0779207.1550100284.git.tom.zanussi@linux.intel.com

Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Tom Zanussi 2019-02-13 17:42:54 -06:00 committed by Steven Rostedt (VMware)
parent 6f6eaa1eba
commit 9c749a1f6e
1 changed files with 42 additions and 0 deletions
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42
tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-trace-action-hist.tc Normal file
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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: event trigger - test inter-event histogram trigger trace action
fail() { #msg
echo $1
exit_fail
}
if [ ! -f set_event ]; then
echo "event tracing is not supported"
exit_unsupported
fi
if [ ! -f synthetic_events ]; then
echo "synthetic event is not supported"
exit_unsupported
fi
grep -q "trace(<synthetic_event>" README || exit_unsupported # version issue
echo "Test create synthetic event"
echo 'wakeup_latency u64 lat pid_t pid char comm[16]' > synthetic_events
if [ ! -d events/synthetic/wakeup_latency ]; then
fail "Failed to create wakeup_latency synthetic event"
fi
echo "Test create histogram for synthetic event using trace action"
echo "Test histogram variables,simple expression support and trace action"
echo 'hist:keys=pid:ts0=common_timestamp.usecs if comm=="ping"' > events/sched/sched_wakeup/trigger
echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_wakeup).trace(wakeup_latency,$wakeup_lat,next_pid,next_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; then
fail "Failed to create trace action inter-event histogram"
fi
exit 0