linux-kernel - Re: [PATCH] perf stat: fix per-pkg event reporting bug

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Message-ID: <CABPqkBRsOyY4Zv4xMe6YKCjmkbq7RqZY4o=4H6evM7x_qRxiLw@mail.gmail.com>
Date:	Thu, 3 Sep 2015 04:48:52 -0700
From:	Stephane Eranian <eranian@...gle.com>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	Namhyung Kim <namhyung@...nel.org>,
	"Liang, Kan" <kan.liang@...el.com>,
	David Ahern <dsahern@...il.com>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCH] perf stat: fix per-pkg event reporting bug

On Thu, Sep 3, 2015 at 3:01 AM, Jiri Olsa <jolsa@...hat.com> wrote:
> On Wed, Sep 02, 2015 at 03:17:51PM +0200, Stephane Eranian wrote:
>
> SNIP
>
>> +     /*
>> +      * we do not consider an event that has not run as a good
>> +      * instance to mark a package as used (skip=1). Otherwise
>> +      * we may run into a situation where the first CPU in a package
>> +      * is not running anything, yet the second is, and this function
>> +      * would mark the package as used after the first CPU and would
>> +      * not read the values from the second CPU.
>> +      */
>> +     if (!(vals->run && vals->ena))
>> +             return 0;
>> +
>>       s = cpu_map__get_socket(cpus, cpu);
>>       if (s < 0)
>>               return -1;
>> @@ -235,7 +247,7 @@ process_counter_values(struct perf_stat_config *config, struct perf_evsel *evsel
>>       static struct perf_counts_values zero;
>>       bool skip = false;
>>
>> -     if (check_per_pkg(evsel, cpu, &skip)) {
>> +     if (check_per_pkg(evsel, aggr, cpu, &skip)) {
>
> should we pass 'count' instead o 'aggr' ?
>
the reason I passed counts_values is in case this function needs to be
called from other places which do
not use aggr mode.
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