name : stat_bpf_counters_cgrp.sh #!/bin/sh # perf stat --bpf-counters --for-each-cgroup test # SPDX-License-Identifier: GPL-2.0 set -e test_cgroups= if [ "$1" = "-v" ]; then verbose="1" fi # skip if --bpf-counters --for-each-cgroup is not supported check_bpf_counter() { if ! perf stat -a --bpf-counters --for-each-cgroup / true > /dev/null 2>&1; then if [ "${verbose}" = "1" ]; then echo "Skipping: --bpf-counters --for-each-cgroup not supported" perf --no-pager stat -a --bpf-counters --for-each-cgroup / true || true fi exit 2 fi } # find two cgroups to measure find_cgroups() { # try usual systemd slices first if [ -d /sys/fs/cgroup/system.slice ] && [ -d /sys/fs/cgroup/user.slice ]; then test_cgroups="system.slice,user.slice" return fi # try root and self cgroups find_cgroups_self_cgrp=$(grep perf_event /proc/self/cgroup | cut -d: -f3) if [ -z ${find_cgroups_self_cgrp} ]; then # cgroup v2 doesn't specify perf_event find_cgroups_self_cgrp=$(grep ^0: /proc/self/cgroup | cut -d: -f3) fi if [ -z ${find_cgroups_self_cgrp} ]; then test_cgroups="/" else test_cgroups="/,${find_cgroups_self_cgrp}" fi } # As cgroup events are cpu-wide, we cannot simply compare the result. # Just check if it runs without failure and has non-zero results. check_system_wide_counted() { check_system_wide_counted_output=$(perf stat -a --bpf-counters --for-each-cgroup ${test_cgroups} -e cpu-clock -x, sleep 1 2>&1) if echo ${check_system_wide_counted_output} | grep -q -F "<not "; then echo "Some system-wide events are not counted" if [ "${verbose}" = "1" ]; then echo ${check_system_wide_counted_output} fi exit 1 fi } check_cpu_list_counted() { check_cpu_list_counted_output=$(perf stat -C 0,1 --bpf-counters --for-each-cgroup ${test_cgroups} -e cpu-clock -x, taskset -c 1 sleep 1 2>&1) if echo ${check_cpu_list_counted_output} | grep -q -F "<not "; then echo "Some CPU events are not counted" if [ "${verbose}" = "1" ]; then echo ${check_cpu_list_counted_output} fi exit 1 fi } check_bpf_counter find_cgroups check_system_wide_counted check_cpu_list_counted exit 0