perf sched timehist: Fix use of CPU list with summary option

Do not update thread stats or show idle summary unless CPU is in the
list of interest.

Fixes: c30d630d1bcfad8d ("perf sched timehist: Add support for filtering on CPU")
Signed-off-by: David Ahern <dsahern@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lore.kernel.org/lkml/20200817170943.1486-1-dsahern@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 0c7d599..e6fc297 100644 (file)
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -2584,7 +2584,8 @@ static int timehist_sched_change_event(struct perf_tool *tool,
        }
 
        if (!sched->idle_hist || thread->tid == 0) {
-               timehist_update_runtime_stats(tr, t, tprev);
+               if (!cpu_list || test_bit(sample->cpu, cpu_bitmap))
+                       timehist_update_runtime_stats(tr, t, tprev);
 
                if (sched->idle_hist) {
                        struct idle_thread_runtime *itr = (void *)tr;
@@ -2857,6 +2858,9 @@ static void timehist_print_summary(struct perf_sched *sched,
 
        printf("\nIdle stats:\n");
        for (i = 0; i < idle_max_cpu; ++i) {
+               if (cpu_list && !test_bit(i, cpu_bitmap))
+                       continue;
+
                t = idle_threads[i];
                if (!t)
                        continue;