* [PATCH] perf stat: Do not open cgroups for BPF counters
@ 2026-07-08 20:04 Namhyung Kim
0 siblings, 0 replies; only message in thread
From: Namhyung Kim @ 2026-07-08 20:04 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Ian Rogers, Jiri Olsa, Adrian Hunter, James Clark, Peter Zijlstra,
Ingo Molnar, LKML, linux-perf-users
The --bpf-counters and --for-each-cgroup options use a set of shared
events among the given cgroups rather than adding events for each cgroup
respectively. It only uses cgroup-ID to compare and calculate the
result. So no need to open and keep FDs for cgroups in BPF mode.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/builtin-stat.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 92cdb2df7285befb..49e523058185b753 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -2888,7 +2888,8 @@ int cmd_stat(int argc, const char **argv)
goto out;
}
- if (evlist__expand_cgroup(evsel_list, stat_config.cgroup_list, true) < 0) {
+ if (evlist__expand_cgroup(evsel_list, stat_config.cgroup_list,
+ !target.use_bpf) < 0) {
parse_options_usage(stat_usage, stat_options,
"for-each-cgroup", 0);
goto out;
--
2.55.0.795.g602f6c329a-goog
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