[PATCH] perf tools: Fix misleading add event pmu debug message

[PATCH] perf tools: Fix misleading add event pmu debug message

[Adrian Hunter]

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: 4ac22b484d4c79 ("perf parse-events: Make add PMU verbose output clearer")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
 tools/perf/util/parse-events.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 24997925ae00..dd84fed698a3 100644
--- 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;
 
-- 
2.25.1

Re: [PATCH] perf tools: Fix misleading add event pmu debug message

[Arnaldo Carvalho de Melo]

Em Mon, Apr 11, 2022 at 09:17:58AM +0300, Adrian Hunter escreveu:
> 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.

Thanks, applied.

- Arnaldo

 
> Fixes: 4ac22b484d4c79 ("perf parse-events: Make add PMU verbose output clearer")
> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
> ---
>  tools/perf/util/parse-events.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
> index 24997925ae00..dd84fed698a3 100644
> --- 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;
>  
> -- 
> 2.25.1

-- 

- Arnaldo