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Commit c349d4af authored by Steven Rostedt (VMware)'s avatar Steven Rostedt (VMware)
Browse files

tracing/selftest: Add selftests to test trace_marker histogram triggers 



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: default avatarMasami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: default avatarNamhyung Kim <namhyung@kernel.org>
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent 922a418d

tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-hist.tc

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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

tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-synthetic.tc

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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