diff options
Diffstat (limited to 'tools/perf/tests')
-rwxr-xr-x | tools/perf/tests/shell/test_arm_spe_fork.sh | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/tools/perf/tests/shell/test_arm_spe_fork.sh b/tools/perf/tests/shell/test_arm_spe_fork.sh new file mode 100755 index 000000000000..c920d3583d30 --- /dev/null +++ b/tools/perf/tests/shell/test_arm_spe_fork.sh @@ -0,0 +1,92 @@ +#!/bin/sh +# Check Arm SPE doesn't hang when there are forks + +# SPDX-License-Identifier: GPL-2.0 +# German Gomez <german.gomez@arm.com>, 2022 + +skip_if_no_arm_spe_event() { + perf list | egrep -q 'arm_spe_[0-9]+//' && return 0 + return 2 +} + +skip_if_no_arm_spe_event || exit 2 + +# skip if there's no compiler +if ! [ -x "$(command -v cc)" ]; then + echo "failed: no compiler, install gcc" + exit 2 +fi + +TEST_PROGRAM_SOURCE=$(mktemp /tmp/__perf_test.program.XXXXX.c) +TEST_PROGRAM=$(mktemp /tmp/__perf_test.program.XXXXX) +PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX) +PERF_RECORD_LOG=$(mktemp /tmp/__perf_test.log.XXXXX) + +cleanup_files() +{ + echo "Cleaning up files..." + rm -f ${PERF_RECORD_LOG} + rm -f ${PERF_DATA} + rm -f ${TEST_PROGRAM_SOURCE} + rm -f ${TEST_PROGRAM} +} + +trap cleanup_files exit term int + +# compile test program +cat << EOF > $TEST_PROGRAM_SOURCE +#include <math.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <sys/wait.h> + +int workload() { + while (1) + sqrt(rand()); + return 0; +} + +int main() { + switch (fork()) { + case 0: + return workload(); + case -1: + return 1; + default: + wait(NULL); + } + return 0; +} +EOF + +echo "Compiling test program..." +CFLAGS="-lm" +cc $TEST_PROGRAM_SOURCE $CFLAGS -o $TEST_PROGRAM || exit 1 + +echo "Recording workload..." +perf record -o ${PERF_DATA} -e arm_spe/period=65536/ -vvv -- $TEST_PROGRAM > ${PERF_RECORD_LOG} 2>&1 & +PERFPID=$! + +# Check if perf hangs by checking the perf-record logs. +sleep 1 +log0=$(wc -l $PERF_RECORD_LOG) +echo Log lines = $log0 +sleep 1 +log1=$(wc -l $PERF_RECORD_LOG) +echo Log lines after 1 second = $log1 + +kill $PERFPID +wait $PERFPID +# test program may leave an orphan process running the workload +killall $(basename $TEST_PROGRAM) + +if [ "$log0" = "$log1" ]; +then + echo "SPE hang test: FAIL" + exit 1 +else + echo "SPE hang test: PASS" +fi + +exit 0 |