linux-kernel - [PATCH 3/3] perf test: Enhance perf stat cgroup BPF counter test

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Message-ID: <20230825164152.165610-3-namhyung@kernel.org>
Date:   Fri, 25 Aug 2023 09:41:52 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-perf-users@...r.kernel.org, bpf@...r.kernel.org
Subject: [PATCH 3/3] perf test: Enhance perf stat cgroup BPF counter test

It has system-wide test and cpu-list test but the cpu-list test fails
sometimes.  It runs sleep command on CPU1 and measure both user.slice
and system.slice cgroups by default (on systemd-based systems).

But if the system was idle enough, sometime the system.slice gets no
count and it makes the test failing.  Maybe that's because it only looks
at the CPU1, let's add CPU0 to increase the chance it finds some tasks.

Fixes: 7901086014bba ("perf test: Add a new test for perf stat cgroup BPF counter")
Reported-by: Arnaldo Carvalho de Melo <acme@...nel.org>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/tests/shell/stat_bpf_counters_cgrp.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/shell/stat_bpf_counters_cgrp.sh b/tools/perf/tests/shell/stat_bpf_counters_cgrp.sh
index a74440a00b6b..e75d0780dc78 100755
--- a/tools/perf/tests/shell/stat_bpf_counters_cgrp.sh
+++ b/tools/perf/tests/shell/stat_bpf_counters_cgrp.sh
@@ -60,7 +60,7 @@ check_system_wide_counted()
 
 check_cpu_list_counted()
 {
-	check_cpu_list_counted_output=$(perf stat -C 1 --bpf-counters --for-each-cgroup ${test_cgroups} -e cpu-clock -x, taskset -c 1 sleep 1  2>&1)
+	check_cpu_list_counted_output=$(perf stat -C 0,1 --bpf-counters --for-each-cgroup ${test_cgroups} -e cpu-clock -x, taskset -c 1 sleep 1  2>&1)
 	if echo ${check_cpu_list_counted_output} | grep -q -F "<not "; then
 		echo "Some CPU events are not counted"
 		if [ "${verbose}" = "1" ]; then
-- 
2.42.0.rc1.204.g551eb34607-goog