1#!/bin/sh 2# perf stat --bpf-counters --for-each-cgroup test 3# SPDX-License-Identifier: GPL-2.0 4 5set -e 6 7test_cgroups= 8if [ "$1" = "-v" ]; then 9 verbose="1" 10fi 11 12# skip if --bpf-counters --for-each-cgroup is not supported 13check_bpf_counter() 14{ 15 if ! perf stat -a --bpf-counters --for-each-cgroup / true > /dev/null 2>&1; then 16 if [ "${verbose}" = "1" ]; then 17 echo "Skipping: --bpf-counters --for-each-cgroup not supported" 18 perf --no-pager stat -a --bpf-counters --for-each-cgroup / true || true 19 fi 20 exit 2 21 fi 22} 23 24# find two cgroups to measure 25find_cgroups() 26{ 27 # try usual systemd slices first 28 if [ -d /sys/fs/cgroup/system.slice ] && [ -d /sys/fs/cgroup/user.slice ]; then 29 test_cgroups="system.slice,user.slice" 30 return 31 fi 32 33 # try root and self cgroups 34 find_cgroups_self_cgrp=$(grep perf_event /proc/self/cgroup | cut -d: -f3) 35 if [ -z ${find_cgroups_self_cgrp} ]; then 36 # cgroup v2 doesn't specify perf_event 37 find_cgroups_self_cgrp=$(grep ^0: /proc/self/cgroup | cut -d: -f3) 38 fi 39 40 if [ -z ${find_cgroups_self_cgrp} ]; then 41 test_cgroups="/" 42 else 43 test_cgroups="/,${find_cgroups_self_cgrp}" 44 fi 45} 46 47# As cgroup events are cpu-wide, we cannot simply compare the result. 48# Just check if it runs without failure and has non-zero results. 49check_system_wide_counted() 50{ 51 check_system_wide_counted_output=$(perf stat -a --bpf-counters --for-each-cgroup ${test_cgroups} -e cpu-clock -x, sleep 1 2>&1) 52 if echo ${check_system_wide_counted_output} | grep -q -F "<not "; then 53 echo "Some system-wide events are not counted" 54 if [ "${verbose}" = "1" ]; then 55 echo ${check_system_wide_counted_output} 56 fi 57 exit 1 58 fi 59} 60 61check_cpu_list_counted() 62{ 63 check_cpu_list_counted_output=$(perf stat -C 0,1 --bpf-counters --for-each-cgroup ${test_cgroups} -e cpu-clock -x, taskset -c 1 sleep 1 2>&1) 64 if echo ${check_cpu_list_counted_output} | grep -q -F "<not "; then 65 echo "Some CPU events are not counted" 66 if [ "${verbose}" = "1" ]; then 67 echo ${check_cpu_list_counted_output} 68 fi 69 exit 1 70 fi 71} 72 73check_bpf_counter 74find_cgroups 75 76check_system_wide_counted 77check_cpu_list_counted 78 79exit 0 80