perf evlist: Introduce method to find if there is a bpf-output event

We'll use it in the next patch, to deciding how to set up the ring
buffer.

Signed-off-by: Howard Chu <howardchu95@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240815013626.935097-2-howardchu95@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index c0379fa1ccfee4e22431819042cdb20e3aa4b568..ef58a7764318f371687bd96d30b35788c2441687 100644 (file)
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -2627,3 +2627,15 @@ void evlist__uniquify_name(struct evlist *evlist)
                }
        }
 }
+
+bool evlist__has_bpf_output(struct evlist *evlist)
+{
+       struct evsel *evsel;
+
+       evlist__for_each_entry(evlist, evsel) {
+               if (evsel__is_bpf_output(evsel))
+                       return true;
+       }
+
+       return false;
+}

diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index b46f1a320783aea11e31660642996afc7e56861f..bcc1c6984bb58a9d69be8ba2788844e3123e5499 100644 (file)
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -447,5 +447,6 @@ int evlist__scnprintf_evsels(struct evlist *evlist, size_t size, char *bf);
 void evlist__check_mem_load_aux(struct evlist *evlist);
 void evlist__warn_user_requested_cpus(struct evlist *evlist, const char *cpu_list);
 void evlist__uniquify_name(struct evlist *evlist);
+bool evlist__has_bpf_output(struct evlist *evlist);
 
 #endif /* __PERF_EVLIST_H */