Re: [PATCH 19/19] perf stat: Remove unused perf_counts.aggr field

From: Ian Rogers
Date: Mon Oct 10 2022 - 19:40:49 EST


On Sun, Oct 9, 2022 at 10:36 PM Namhyung Kim <namhyung@xxxxxxxxxx> wrote:
>
> The aggr field in the struct perf_counts is to keep the aggregated value
> in the AGGR_GLOBAL for the old code. But it's not used anymore.
>
> Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
> ---
> tools/perf/util/counts.c | 1 -
> tools/perf/util/counts.h | 1 -
> tools/perf/util/stat.c | 35 ++---------------------------------
> 3 files changed, 2 insertions(+), 35 deletions(-)

Very nice!

Acked-by: Ian Rogers <irogers@xxxxxxxxxx>

Thanks,
Ian

>
> diff --git a/tools/perf/util/counts.c b/tools/perf/util/counts.c
> index 7a447d918458..11cd85b278a6 100644
> --- a/tools/perf/util/counts.c
> +++ b/tools/perf/util/counts.c
> @@ -48,7 +48,6 @@ void perf_counts__reset(struct perf_counts *counts)
> {
> xyarray__reset(counts->loaded);
> xyarray__reset(counts->values);
> - memset(&counts->aggr, 0, sizeof(struct perf_counts_values));
> }
>
> void evsel__reset_counts(struct evsel *evsel)
> diff --git a/tools/perf/util/counts.h b/tools/perf/util/counts.h
> index 5de275194f2b..42760242e0df 100644
> --- a/tools/perf/util/counts.h
> +++ b/tools/perf/util/counts.h
> @@ -11,7 +11,6 @@ struct evsel;
>
> struct perf_counts {
> s8 scaled;
> - struct perf_counts_values aggr;
> struct xyarray *values;
> struct xyarray *loaded;
> };
> diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
> index 1652586a4925..0dccfa273fa7 100644
> --- a/tools/perf/util/stat.c
> +++ b/tools/perf/util/stat.c
> @@ -307,8 +307,6 @@ static void evsel__copy_prev_raw_counts(struct evsel *evsel)
> *perf_counts(evsel->prev_raw_counts, idx, thread);
> }
> }
> -
> - evsel->counts->aggr = evsel->prev_raw_counts->aggr;
> }
>
> void evlist__copy_prev_raw_counts(struct evlist *evlist)
> @@ -319,26 +317,6 @@ void evlist__copy_prev_raw_counts(struct evlist *evlist)
> evsel__copy_prev_raw_counts(evsel);
> }
>
> -void evlist__save_aggr_prev_raw_counts(struct evlist *evlist)
> -{
> - struct evsel *evsel;
> -
> - /*
> - * To collect the overall statistics for interval mode,
> - * we copy the counts from evsel->prev_raw_counts to
> - * evsel->counts. The perf_stat_process_counter creates
> - * aggr values from per cpu values, but the per cpu values
> - * are 0 for AGGR_GLOBAL. So we use a trick that saves the
> - * previous aggr value to the first member of perf_counts,
> - * then aggr calculation in process_counter_values can work
> - * correctly.
> - */
> - evlist__for_each_entry(evlist, evsel) {
> - *perf_counts(evsel->prev_raw_counts, 0, 0) =
> - evsel->prev_raw_counts->aggr;
> - }
> -}
> -
> static size_t pkg_id_hash(const void *__key, void *ctx __maybe_unused)
> {
> uint64_t *key = (uint64_t *) __key;
> @@ -422,7 +400,6 @@ process_counter_values(struct perf_stat_config *config, struct evsel *evsel,
> int cpu_map_idx, int thread,
> struct perf_counts_values *count)
> {
> - struct perf_counts_values *aggr = &evsel->counts->aggr;
> struct perf_stat_evsel *ps = evsel->stats;
> static struct perf_counts_values zero;
> bool skip = false;
> @@ -491,12 +468,6 @@ process_counter_values(struct perf_stat_config *config, struct evsel *evsel,
> }
> }
>
> - if (config->aggr_mode == AGGR_GLOBAL) {
> - aggr->val += count->val;
> - aggr->ena += count->ena;
> - aggr->run += count->run;
> - }
> -
> return 0;
> }
>
> @@ -521,13 +492,10 @@ static int process_counter_maps(struct perf_stat_config *config,
> int perf_stat_process_counter(struct perf_stat_config *config,
> struct evsel *counter)
> {
> - struct perf_counts_values *aggr = &counter->counts->aggr;
> struct perf_stat_evsel *ps = counter->stats;
> - u64 *count = counter->counts->aggr.values;
> + u64 *count;
> int ret;
>
> - aggr->val = aggr->ena = aggr->run = 0;
> -
> if (counter->per_pkg)
> evsel__zero_per_pkg(counter);
>
> @@ -538,6 +506,7 @@ int perf_stat_process_counter(struct perf_stat_config *config,
> if (config->aggr_mode != AGGR_GLOBAL)
> return 0;
>
> + count = ps->aggr[0].counts.values;
> update_stats(&ps->res_stats, *count);
>
> if (verbose > 0) {
> --
> 2.38.0.rc1.362.ged0d419d3c-goog
>