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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: event 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 -o ! -d events/sched ]; then
echo "event tracing is not supported"
exit_unsupported
fi
if [ ! -f events/sched/sched_process_fork/trigger ]; then
echo "event trigger is not supported"
exit_unsupported
fi
if [ ! -f events/sched/sched_process_fork/hist ]; then
echo "hist trigger is not supported"
exit_unsupported
fi
reset_tracer
do_reset
echo "Test histogram basic tigger"
echo 'hist:keys=parent_pid:vals=child_pid' > events/sched/sched_process_fork/trigger
for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
grep parent_pid events/sched/sched_process_fork/hist > /dev/null || \
fail "hist trigger on sched_process_fork did not work"
grep child events/sched/sched_process_fork/hist > /dev/null || \
fail "hist trigger on sched_process_fork did not work"
reset_trigger
echo "Test histogram with compound keys"
echo 'hist:keys=parent_pid,child_pid' > events/sched/sched_process_fork/trigger
for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
grep '^{ parent_pid:.*, child_pid:.*}' events/sched/sched_process_fork/hist > /dev/null || \
fail "compound keys on sched_process_fork did not work"
reset_trigger
echo "Test histogram with string key"
echo 'hist:keys=parent_comm' > events/sched/sched_process_fork/trigger
for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
COMM=`cat /proc/$$/comm`
grep "parent_comm: $COMM" events/sched/sched_process_fork/hist > /dev/null || \
fail "string key on sched_process_fork did not work"
reset_trigger
echo "Test histogram with sort key"
echo 'hist:keys=parent_pid,child_pid:sort=child_pid.ascending' > events/sched/sched_process_fork/trigger
for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
check_inc() {
while [ $# -gt 1 ]; do
[ $1 -gt $2 ] && return 1
shift 1
done
return 0
}
check_inc `grep -o "child_pid:[[:space:]]*[[:digit:]]*" \
events/sched/sched_process_fork/hist | cut -d: -f2 ` ||
fail "sort param on sched_process_fork did not work"
do_reset
exit 0
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