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#!/bin/sh
# perf ftrace tests
# SPDX-License-Identifier: GPL-2.0
set -e
# perf ftrace commands only works for root
if [ "$(id -u)" != 0 ]; then
echo "perf ftrace test [Skipped: no permission]"
exit 2
fi
output=$(mktemp /tmp/__perf_test.ftrace.XXXXXX)
cleanup() {
rm -f "${output}"
trap - EXIT TERM INT
}
trap_cleanup() {
cleanup
exit 1
}
trap trap_cleanup EXIT TERM INT
# this will be set in test_ftrace_trace()
target_function=
test_ftrace_list() {
echo "perf ftrace list test"
perf ftrace -F > "${output}"
# this will be used in test_ftrace_trace()
sleep_functions=$(grep 'sys_.*sleep$' "${output}")
echo "syscalls for sleep:"
echo "${sleep_functions}"
echo "perf ftrace list test [Success]"
}
test_ftrace_trace() {
echo "perf ftrace trace test"
perf ftrace trace --graph-opts depth=5 sleep 0.1 > "${output}"
# it should have some function name contains 'sleep'
grep "^#" "${output}"
grep -F 'sleep()' "${output}"
# find actual syscall function name
for FN in ${sleep_functions}; do
if grep -q "${FN}" "${output}"; then
target_function="${FN}"
echo "perf ftrace trace test [Success]"
return
fi
done
echo "perf ftrace trace test [Failure: sleep syscall not found]"
exit 1
}
test_ftrace_latency() {
echo "perf ftrace latency test"
echo "target function: ${target_function}"
perf ftrace latency -T "${target_function}" sleep 0.1 > "${output}"
grep "^#" "${output}"
grep "###" "${output}"
echo "perf ftrace latency test [Success]"
}
test_ftrace_profile() {
echo "perf ftrace profile test"
perf ftrace profile sleep 0.1 > "${output}"
grep ^# "${output}"
grep sleep "${output}"
grep schedule "${output}"
grep execve "${output}"
time_re="[[:space:]]+10[[:digit:]]{4}\.[[:digit:]]{3}"
# 100283.000 100283.000 100283.000 1 __x64_sys_clock_nanosleep
# Check for one *clock_nanosleep line with a Count of just 1 that takes a bit more than 0.1 seconds
# Strip the _x64_sys part to work with other architectures
grep -E "^${time_re}${time_re}${time_re}[[:space:]]+1[[:space:]]+.*clock_nanosleep" "${output}"
echo "perf ftrace profile test [Success]"
}
test_ftrace_list
test_ftrace_trace
test_ftrace_latency
test_ftrace_profile
cleanup
exit 0
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