linux-kernel - Re: [PATCH 2/2] perf sched timehist: Fix use of CPU list with summary option

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Date:   Tue, 11 Aug 2020 21:12:10 -0600
From:   David Ahern <dsahern@...il.com>
To:     Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Jiri Olsa <jolsa@...nel.org>
Subject: Re: [PATCH 2/2] perf sched timehist: Fix use of CPU list with summary
 option

On 8/11/20 12:42 AM, Namhyung Kim wrote:
>> @@ -2575,7 +2575,8 @@ 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;
>> @@ -2848,6 +2849,9 @@ static void timehist_print_summary(struct perf_sched *sched,
>>
>>         printf("\nIdle stats:\n");
>>         for (i = 0; i < idle_max_cpu; ++i) {
>> +               if (!test_bit(i, cpu_bitmap))
> 
> Shouldn't it check cpu_list as well?
> 

oh, right. will fix.