$ 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: Namhyung Kim <namhyung@xxxxxxxxxx>
---
.../tests/shell/stat_bpf_counters_cgrp.sh | 83 +++++++++++++++++++
1 file changed, 83 insertions(+)
create mode 100755 tools/perf/tests/shell/stat_bpf_counters_cgrp.sh
diff --git a/tools/perf/tests/shell/stat_bpf_counters_cgrp.sh b/tools/perf/tests/shell/stat_bpf_counters_cgrp.sh
new file mode 100755
index 000000000000..d724855d097c
--- /dev/null
+++ b/tools/perf/tests/shell/stat_bpf_counters_cgrp.sh
@@ -0,0 +1,83 @@
+#!/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
--
2.37.2.789.g6183377224-goog
