Re: [PATCH v1 02/10] perf parse-events filter: Use evsel__find_pmu

[Arnaldo Carvalho de Melo <acme@kernel.org>]

On Sat, Jan 11, 2025 at 11:01:35AM -0800, Ian Rogers wrote:
> Rather than manually scanning PMUs, use evsel__find_pmu that can use
> the PMU set during event parsing.

Right, and then evsel__find_pmu() also does some extra checks to call
pmu_read_sysfs() more selectively, right?

- Arnaldo
 
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
>  tools/perf/util/parse-events.c | 14 ++++----------
>  1 file changed, 4 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
> index 1e23faa364b1..f147e13a7017 100644
> --- a/tools/perf/util/parse-events.c
> +++ b/tools/perf/util/parse-events.c
> @@ -2406,9 +2406,8 @@ foreach_evsel_in_last_glob(struct evlist *evlist,
>  static int set_filter(struct evsel *evsel, const void *arg)
>  {
>  	const char *str = arg;
> -	bool found = false;
>  	int nr_addr_filters = 0;
> -	struct perf_pmu *pmu = NULL;
> +	struct perf_pmu *pmu;
>  
>  	if (evsel == NULL) {
>  		fprintf(stderr,
> @@ -2426,16 +2425,11 @@ static int set_filter(struct evsel *evsel, const void *arg)
>  		return 0;
>  	}
>  
> -	while ((pmu = perf_pmus__scan(pmu)) != NULL)
> -		if (pmu->type == evsel->core.attr.type) {
> -			found = true;
> -			break;
> -		}
> -
> -	if (found)
> +	pmu = evsel__find_pmu(evsel);
> +	if (pmu) {
>  		perf_pmu__scan_file(pmu, "nr_addr_filters",
>  				    "%d", &nr_addr_filters);
> -
> +	}
>  	if (!nr_addr_filters)
>  		return perf_bpf_filter__parse(&evsel->bpf_filters, str);
>  
> -- 
> 2.47.1.613.gc27f4b7a9f-goog