perf tools: Fix misleading add event PMU debug message

Fix incorrect debug message:

   Attempting to add event pmu 'intel_pt' with '' that may result in
   non-fatal errors

which always appears with perf record -vv and intel_pt e.g.

    perf record -vv -e intel_pt//u uname

The message is incorrect because there will never be non-fatal errors.

Suppress the message if the PMU is 'selectable' i.e. meant to be
selected directly as an event.

Fixes: 4ac22b484d4c79e8 ("perf parse-events: Make add PMU verbose output clearer")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lore.kernel.org/lkml/20220411061758.2458417-1-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 24997925ae00d66a95c58b2afdac3d54894661f3..dd84fed698a3bedd087a61ea9aa478ee15995fff 100644 (file)
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1523,7 +1523,9 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
        bool use_uncore_alias;
        LIST_HEAD(config_terms);
 
-       if (verbose > 1) {
+       pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
+
+       if (verbose > 1 && !(pmu && pmu->selectable)) {
                fprintf(stderr, "Attempting to add event pmu '%s' with '",
                        name);
                if (head_config) {
@@ -1536,7 +1538,6 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
                fprintf(stderr, "' that may result in non-fatal errors\n");
        }
 
-       pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
        if (!pmu) {
                char *err_str;