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 -a -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 local self_cgrp=$(grep perf_event /proc/self/cgroup | cut -d: -f3) 35 if [ -z ${self_cgrp} ]; then 36 # cgroup v2 doesn't specify perf_event 37 self_cgrp=$(grep ^0: /proc/self/cgroup | cut -d: -f3) 38 fi 39 40 if [ -z ${self_cgrp} ]; then 41 test_cgroups="/" 42 else 43 test_cgroups="/,${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 local output 52 53 output=$(perf stat -a --bpf-counters --for-each-cgroup ${test_cgroups} -e cpu-clock -x, sleep 1 2>&1) 54 if echo ${output} | grep -q -F "<not "; then 55 echo "Some system-wide events are not counted" 56 if [ "${verbose}" = "1" ]; then 57 echo ${output} 58 fi 59 exit 1 60 fi 61} 62 63check_cpu_list_counted() 64{ 65 local output 66 67 output=$(perf stat -C 1 --bpf-counters --for-each-cgroup ${test_cgroups} -e cpu-clock -x, taskset -c 1 sleep 1 2>&1) 68 if echo ${output} | grep -q -F "<not "; then 69 echo "Some CPU events are not counted" 70 if [ "${verbose}" = "1" ]; then 71 echo ${output} 72 fi 73 exit 1 74 fi 75} 76 77check_bpf_counter 78find_cgroups 79 80check_system_wide_counted 81check_cpu_list_counted 82 83exit 0 84