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#!/bin/bash
# perf top tests (exclusive)
# SPDX-License-Identifier: GPL-2.0
set -e
err=0
log_file=$(mktemp /tmp/perf.top.log.XXXXX)
cleanup() {
rm -f "${log_file}"
trap - EXIT TERM INT
}
trap_cleanup() {
echo "Unexpected signal in ${FUNCNAME[1]}"
cleanup
exit 1
}
trap trap_cleanup EXIT TERM INT
test_basic_perf_top() {
echo "Basic perf top test"
# Start a workload that spins to generate samples
# thloop runs for the specified number of seconds
perf test -w thloop 20 &
PID=$!
# Allow it to start
sleep 0.1
# Run perf top for 5 seconds, monitoring that PID
# Use --stdio to avoid TUI and redirect output
# Use -d 1 to avoid flooding output
# Use -e cpu-clock to ensure we get samples
# Use sleep to keep stdin open but silent, preventing EOF loop or interactive spam
retval=0
sleep 10 | timeout 5s perf top --stdio -d 1 -e cpu-clock \
-p $PID > "${log_file}" 2>&1 || retval=$?
if [ "${retval:-0}" -ne 124 ] && [ "${retval:-0}" -ne 0 ]; then
echo "Basic perf top test [Failed: perf top failed to start or run (ret=$retval)]"
head -n 50 "${log_file}"
kill $PID 2>/dev/null || true
wait $PID 2>/dev/null || true
err=1
return
fi
kill $PID 2>/dev/null || true
wait $PID 2>/dev/null || true
# Check for some sample data (percentage)
if ! grep -E -q "[0-9]+\.[0-9]+%" "${log_file}"; then
echo "Basic perf top test [Failed: no sample percentage found]"
head -n 50 "${log_file}"
err=1
return
fi
# Check for the symbol
if ! grep -q "test_loop" "${log_file}"; then
echo "Basic perf top test [Failed: test_loop symbol not found]"
head -n 50 "${log_file}"
err=1
return
fi
echo "Basic perf top test [Success]"
}
test_hybrid_merge_perf_top() {
echo "Perf top hybrid merge test"
perf test -w thloop 20 &
PID=$!
# Allow it to start
sleep 0.1
# Run without explicitly requesting -e cycles so heavily virtualized
# environments can seamlessly fall back to cpu-clock while real
# hybrid hardware will naturally cover the merge logic.
retval=0
sleep 10 | timeout 5s perf top \
--stdio --hybrid-merge -d 1 -p $PID > "${log_file}" 2>&1 || retval=$?
if [ "${retval:-0}" -ne 124 ] && [ "${retval:-0}" -ne 0 ]; then
echo "Perf top hybrid merge test [Failed: run err=$retval]"
head -n 50 "${log_file}"
kill $PID 2>/dev/null || true
wait $PID 2>/dev/null || true
err=1
return
fi
kill $PID 2>/dev/null || true
wait $PID 2>/dev/null || true
# Wait a tiny bit for the file system to catch up on the logs
sleep 0.1
# Check for some sample data (percentage)
if ! grep -E -q "[0-9]+\.[0-9]+%" "${log_file}"; then
echo "Perf top hybrid merge test [Failed: no sample percentage found]"
head -n 50 "${log_file}"
err=1
return
fi
# Check for the test loop symbol to ensure attribution worked
if ! grep -q "test_loop" "${log_file}"; then
echo "Perf top hybrid merge test [Failed: test_loop symbol not found]"
head -n 50 "${log_file}"
err=1
return
fi
echo "Perf top hybrid merge test [Success]"
}
test_basic_perf_top
test_hybrid_merge_perf_top
cleanup
exit $err
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