Commit 79010860 authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo

perf test: Add a new test for perf stat cgroup BPF counter

  $ sudo ./perf test -v each-cgroup
   96: perf stat --bpf-counters --for-each-cgroup test                 :
  --- start ---
  test child forked, pid 79600
  test child finished with 0
  ---- end ----
  perf stat --bpf-counters --for-each-cgroup test: Ok
Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20220916184132.1161506-5-namhyung@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 8a92605d
#!/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 -a -d /sys/fs/cgroup/user.slice ]; then
test_cgroups="system.slice,user.slice"
return
fi
# try root and self cgroups
local self_cgrp=$(grep perf_event /proc/self/cgroup | cut -d: -f3)
if [ -z ${self_cgrp} ]; then
# cgroup v2 doesn't specify perf_event
self_cgrp=$(grep ^0: /proc/self/cgroup | cut -d: -f3)
fi
if [ -z ${self_cgrp} ]; then
test_cgroups="/"
else
test_cgroups="/,${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()
{
local output
output=$(perf stat -a --bpf-counters --for-each-cgroup ${test_cgroups} -e cpu-clock -x, sleep 1 2>&1)
if echo ${output} | grep -q -F "<not "; then
echo "Some system-wide events are not counted"
if [ "${verbose}" = "1" ]; then
echo ${output}
fi
exit 1
fi
}
check_cpu_list_counted()
{
local output
output=$(perf stat -C 1 --bpf-counters --for-each-cgroup ${test_cgroups} -e cpu-clock -x, taskset -c 1 sleep 1 2>&1)
if echo ${output} | grep -q -F "<not "; then
echo "Some CPU events are not counted"
if [ "${verbose}" = "1" ]; then
echo ${output}
fi
exit 1
fi
}
check_bpf_counter
find_cgroups
check_system_wide_counted
check_cpu_list_counted
exit 0
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment