Commit 75e96173 authored by Ian Rogers's avatar Ian Rogers Committed by Namhyung Kim
Browse files

perf tests top: Add basic perf top coverage test 



The test starts a backgroup thloop workload and monitors it using
cpu-clock ensuring test_loop appears in the output.

Signed-off-by: default avatarIan Rogers <irogers@google.com>
Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
parent 0eb307d9

tools/perf/tests/shell/top.sh

0 → 100755
+74 −0
Original line number Diff line number Diff line 
#!/bin/bash

# perf top tests

# 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

	if ! sleep 10 | timeout 5s perf top --stdio -d 1 -e cpu-clock -p $PID > "${log_file}" 2>&1; then

		retval=$?

		if [ $retval -ne 124 ] && [ $retval -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

			wait $PID 2>/dev/null || true

			err=1

			return

		fi

	fi



	kill $PID

	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_basic_perf_top

cleanup

exit $err