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