linux-kernel - Re: [PATCH v1 4/9] perf util: Update and print per-thread shadow stats

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Date:   Wed, 22 Nov 2017 10:42:34 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v1 4/9] perf util: Update and print per-thread shadow
 stats



On 11/21/2017 11:17 PM, Jiri Olsa wrote:
> On Mon, Nov 20, 2017 at 10:43:39PM +0800, Jin Yao wrote:
> 
> SNIP
> 
>> diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
>> index 045e129..6f28782 100644
>> --- a/tools/perf/util/stat-shadow.c
>> +++ b/tools/perf/util/stat-shadow.c
>> @@ -110,19 +110,32 @@ static void saved_value_delete(struct rblist *rblist __maybe_unused,
>>   
>>   static struct saved_value *saved_value_lookup(struct perf_evsel *evsel,
>>   					      int cpu,
>> -					      bool create)
>> +					      bool create,
>> +					      enum stat_type type,
>> +					      int ctx,
>> +					      struct runtime_stat *stat)
>>   {
>> +	struct rblist *rblist;
>>   	struct rb_node *nd;
>>   	struct saved_value dm = {
>>   		.cpu = cpu,
>>   		.evsel = evsel,
>> +		.type = type,
>> +		.ctx = ctx,
>> +		.stat = stat,
>>   	};
>> -	nd = rblist__find(&runtime_saved_values, &dm);
>> +
>> +	if (stat)
>> +		rblist = &stat->value_list;
>> +	else
>> +		rblist = &rt_stat.value_list;
> 
> please pass the correct 'struct runtime_stat *stat',
> 
> I don't see a reason noot to pass &rt_stat directly below:
> 
> 
>> diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
>> index 151e9ef..50bb16d 100644
>> --- a/tools/perf/util/stat.c
>> +++ b/tools/perf/util/stat.c
>> @@ -278,9 +278,16 @@ process_counter_values(struct perf_stat_config *config, struct perf_evsel *evsel
>>   			perf_evsel__compute_deltas(evsel, cpu, thread, count);
>>   		perf_counts_values__scale(count, config->scale, NULL);
>>   		if (config->aggr_mode == AGGR_NONE)
>> -			perf_stat__update_shadow_stats(evsel, count->val, cpu);
>> -		if (config->aggr_mode == AGGR_THREAD)
>> -			perf_stat__update_shadow_stats(evsel, count->val, 0);
>> +			perf_stat__update_shadow_stats(evsel, count->val, cpu,
>> +						       NULL);
>> +		if (config->aggr_mode == AGGR_THREAD) {
>> +			if (config->stats)
>> +				perf_stat__update_shadow_stats(evsel,
>> +					count->val, 0, &config->stats[thread]);
>> +			else
>> +				perf_stat__update_shadow_stats(evsel,
>> +					count->val, 0, NULL);
> 
> here
> 
>> +		}
>>   		break;
>>   	case AGGR_GLOBAL:
>>   		aggr->val += count->val;
>> @@ -362,7 +369,7 @@ int perf_stat_process_counter(struct perf_stat_config *config,
>>   	/*
>>   	 * Save the full runtime - to allow normalization during printout:
>>   	 */
>> -	perf_stat__update_shadow_stats(counter, *count, 0);
>> +	perf_stat__update_shadow_stats(counter, *count, 0, NULL);
> 
> and here
> 
> thanks,
> jirka
> 

Fine, I will pass &rt_stat to perf_stat__update_shadow_stats to replace 
the NULL.

The change maybe needs to let the rt_stat be a global variable.

Thanks
Jin Yao