linux-kernel - Re: [PATCH 1/3] libperf: Add perf_cpu_map_

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Date:   Mon, 2 Sep 2019 10:57:21 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>,
        Joe Mario <jmario@...hat.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 1/3] libperf: Add perf_cpu_map__max function

Em Mon, Sep 02, 2019 at 02:12:53PM +0200, Jiri Olsa escreveu:
> So it can be used from multiple places.

Applied.

- Arnaldo
 
> Link: http://lkml.kernel.org/n/tip-yp3h5rl9e8piybufq41zqnla@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  tools/perf/builtin-stat.c            | 14 +-------------
>  tools/perf/lib/cpumap.c              | 12 ++++++++++++
>  tools/perf/lib/include/perf/cpumap.h |  1 +
>  tools/perf/lib/libperf.map           |  1 +
>  4 files changed, 15 insertions(+), 13 deletions(-)
> 
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index 7e17bf9f700a..5bc0c570b7b6 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -822,18 +822,6 @@ static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
>  	return cpu_map__get_core(map, cpu, NULL);
>  }
>  
> -static int cpu_map__get_max(struct perf_cpu_map *map)
> -{
> -	int i, max = -1;
> -
> -	for (i = 0; i < map->nr; i++) {
> -		if (map->map[i] > max)
> -			max = map->map[i];
> -	}
> -
> -	return max;
> -}
> -
>  static int perf_stat__get_aggr(struct perf_stat_config *config,
>  			       aggr_get_id_t get_id, struct perf_cpu_map *map, int idx)
>  {
> @@ -928,7 +916,7 @@ static int perf_stat_init_aggr_mode(void)
>  	 * taking the highest cpu number to be the size of
>  	 * the aggregation translate cpumap.
>  	 */
> -	nr = cpu_map__get_max(evsel_list->core.cpus);
> +	nr = perf_cpu_map__max(evsel_list->core.cpus);
>  	stat_config.cpus_aggr_map = perf_cpu_map__empty_new(nr + 1);
>  	return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
>  }
> diff --git a/tools/perf/lib/cpumap.c b/tools/perf/lib/cpumap.c
> index 1f0e6f334237..2ca1fafa620d 100644
> --- a/tools/perf/lib/cpumap.c
> +++ b/tools/perf/lib/cpumap.c
> @@ -260,3 +260,15 @@ int perf_cpu_map__idx(struct perf_cpu_map *cpus, int cpu)
>  
>  	return -1;
>  }
> +
> +int perf_cpu_map__max(struct perf_cpu_map *map)
> +{
> +	int i, max = -1;
> +
> +	for (i = 0; i < map->nr; i++) {
> +		if (map->map[i] > max)
> +			max = map->map[i];
> +	}
> +
> +	return max;
> +}
> diff --git a/tools/perf/lib/include/perf/cpumap.h b/tools/perf/lib/include/perf/cpumap.h
> index 8aa995c59498..ac9aa497f84a 100644
> --- a/tools/perf/lib/include/perf/cpumap.h
> +++ b/tools/perf/lib/include/perf/cpumap.h
> @@ -16,6 +16,7 @@ LIBPERF_API void perf_cpu_map__put(struct perf_cpu_map *map);
>  LIBPERF_API int perf_cpu_map__cpu(const struct perf_cpu_map *cpus, int idx);
>  LIBPERF_API int perf_cpu_map__nr(const struct perf_cpu_map *cpus);
>  LIBPERF_API bool perf_cpu_map__empty(const struct perf_cpu_map *map);
> +LIBPERF_API int perf_cpu_map__max(struct perf_cpu_map *map);
>  
>  #define perf_cpu_map__for_each_cpu(cpu, idx, cpus)		\
>  	for ((idx) = 0, (cpu) = perf_cpu_map__cpu(cpus, idx);	\
> diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
> index dc4d66363bc4..cd0d17b996c8 100644
> --- a/tools/perf/lib/libperf.map
> +++ b/tools/perf/lib/libperf.map
> @@ -9,6 +9,7 @@ LIBPERF_0.0.1 {
>  		perf_cpu_map__nr;
>  		perf_cpu_map__cpu;
>  		perf_cpu_map__empty;
> +		perf_cpu_map__max;
>  		perf_thread_map__new_dummy;
>  		perf_thread_map__set_pid;
>  		perf_thread_map__comm;
> -- 
> 2.21.0

-- 

- Arnaldo