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tracing/selftest: Add selftests to test trace_marker histogram triggers

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Add a couple of tests that test the trace_marker histogram triggers.
One does a straight histogram test, the other will create a synthetic event
and test the latency between two different writes (using filters to
differentiate between them).

Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (VMware) 2018-05-14 15:38:57 -04:00
parent 922a418d68
commit c349d4af86
2 changed files with 115 additions and 0 deletions
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49
tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-hist.tc Normal file
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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: trace_marker trigger - test histogram trigger
# flags: instance
do_reset() {
reset_trigger
echo > set_event
clear_trace
}
fail() { #msg
do_reset
echo $1
exit_fail
}
if [ ! -f set_event ]; then
echo "event tracing is not supported"
exit_unsupported
fi
if [ ! -d events/ftrace/print ]; then
echo "event trace_marker is not supported"
exit_unsupported
fi
if [ ! -f events/ftrace/print/trigger ]; then
echo "event trigger is not supported"
exit_unsupported
fi
if [ ! -f events/ftrace/print/hist ]; then
echo "hist trigger is not supported"
exit_unsupported
fi
do_reset
echo "Test histogram trace_marker tigger"
echo 'hist:keys=common_pid' > events/ftrace/print/trigger
for i in `seq 1 10` ; do echo "hello" > trace_marker; done
grep 'hitcount: *10$' events/ftrace/print/hist > /dev/null || \
fail "hist trigger did not trigger correct times on trace_marker"
do_reset
exit 0

66
tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-synthetic.tc Normal file
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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: trace_marker trigger - test histogram with synthetic event
# flags:
do_reset() {
reset_trigger
echo > set_event
echo > synthetic_events
clear_trace
}
fail() { #msg
do_reset
echo $1
exit_fail
}
if [ ! -f set_event ]; then
echo "event tracing is not supported"
exit_unsupported
fi
if [ ! -f synthetic_events ]; then
echo "synthetic events not supported"
exit_unsupported
fi
if [ ! -d events/ftrace/print ]; then
echo "event trace_marker is not supported"
exit_unsupported
fi
if [ ! -f events/ftrace/print/trigger ]; then
echo "event trigger is not supported"
exit_unsupported
fi
if [ ! -f events/ftrace/print/hist ]; then
echo "hist trigger is not supported"
exit_unsupported
fi
do_reset
echo "Test histogram trace_marker to trace_marker latency histogram trigger"
echo 'latency u64 lat' > synthetic_events
echo 'hist:keys=common_pid:ts0=common_timestamp.usecs if buf == "start"' > events/ftrace/print/trigger
echo 'hist:keys=common_pid:lat=common_timestamp.usecs-$ts0:onmatch(ftrace.print).latency($lat) if buf == "end"' >> events/ftrace/print/trigger
echo 'hist:keys=common_pid,lat:sort=lat' > events/synthetic/latency/trigger
echo -n "start" > trace_marker
echo -n "end" > trace_marker
cnt=`grep 'hitcount: *1$' events/ftrace/print/hist | wc -l`
if [ $cnt -ne 2 ]; then
fail "hist trace_marker trigger did not trigger correctly"
fi
grep 'hitcount: *1$' events/synthetic/latency/hist > /dev/null || \
fail "hist trigger did not trigger "
do_reset
exit 0