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#!/bin/bash
# perf script python tests
# SPDX-License-Identifier: GPL-2.0
set -e
# set PERF_EXEC_PATH to find scripts in the source directory
perfdir=$(dirname "$0")/../..
if [ -e "$perfdir/scripts/python/Perf-Trace-Util" ]; then
export PERF_EXEC_PATH=$perfdir
fi
perfdata=$(mktemp /tmp/__perf_test_script_python.perf.data.XXXXX)
generated_script=$(mktemp /tmp/__perf_test_script.XXXXX.py)
cleanup() {
rm -f "${perfdata}"
rm -f "${generated_script}"
trap - EXIT TERM INT
}
trap_cleanup() {
echo "Unexpected signal in ${FUNCNAME[1]}"
cleanup
exit 1
}
trap trap_cleanup TERM INT
trap cleanup EXIT
check_python_support() {
if perf check feature -q libpython; then
return 0
fi
echo "perf script python test [Skipped: no libpython support]"
return 2
}
test_script() {
local event_name=$1
local expected_output=$2
local record_opts=$3
echo "Testing event: $event_name"
# Try to record. If this fails, it might be permissions or lack of
# support. Return 2 to indicate "skip this event" rather than "fail
# test".
if ! perf record -o "${perfdata}" -e "$event_name" $record_opts -- perf test -w thloop > /dev/null 2>&1; then
echo "perf script python test [Skipped: failed to record $event_name]"
return 2
fi
echo "Generating python script..."
if ! perf script -i "${perfdata}" -g "${generated_script}"; then
echo "perf script python test [Failed: script generation for $event_name]"
return 1
fi
if [ ! -f "${generated_script}" ]; then
echo "perf script python test [Failed: script not generated for $event_name]"
return 1
fi
# Perf script -g python doesn't generate process_event for generic
# events so append it manually to test that the callback works.
if ! grep -q "def process_event" "${generated_script}"; then
cat <<EOF >> "${generated_script}"
def process_event(param_dict):
print("param_dict: %s" % param_dict)
EOF
fi
echo "Executing python script..."
output=$(perf script -i "${perfdata}" -s "${generated_script}" 2>&1)
if echo "$output" | grep -q "$expected_output"; then
echo "perf script python test [Success: $event_name triggered $expected_output]"
return 0
else
echo "perf script python test [Failed: $event_name did not trigger $expected_output]"
echo "Output was:"
echo "$output" | head -n 20
return 1
fi
}
check_python_support || exit 2
# Try tracepoint first
test_script "sched:sched_switch" "sched__sched_switch" "-c 1" && res=0 || res=$?
if [ $res -eq 0 ]; then
exit 0
elif [ $res -eq 1 ]; then
exit 1
fi
# If tracepoint skipped (res=2), try task-clock
# For generic events like task-clock, the generated script uses process_event()
# which prints the param_dict.
test_script "task-clock" "param_dict" "-c 100" && res=0 || res=$?
if [ $res -eq 0 ]; then
exit 0
elif [ $res -eq 1 ]; then
exit 1
fi
# If both skipped
echo "perf script python test [Skipped: Could not record tracepoint or task-clock]"
exit 2
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