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 20:06:06 +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 11/22/2017 4:37 PM, Jiri Olsa wrote:
> On Wed, Nov 22, 2017 at 11:10:37AM +0800, Jin, Yao wrote:
>>
>>
>> On 11/21/2017 11:18 PM, Jiri Olsa wrote:
>>> On Mon, Nov 20, 2017 at 10:43:39PM +0800, Jin Yao wrote:
>>>
>>> SNIP
>>>
>>>>    	if (num == 0)
>>>> 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]);
>>>
>>> please add this part together with config->stats allocation/usage
>>> and keep this change only about adding the struct runtime_stat *stat
>>> into the code path with no functional change
>>>
>>> thanks,
>>> jirka
>>>
>>
>> The interface of perf_stat__update_shadow_stats() is changed (added with a
>> new parameter 'struct runtime_stat *stat').
>>
>> If I move above part to another patch (e.g. move to
>> v1-0006-perf-stat-Allocate-shadow-stats-buffer-for-thread.patch), the
>> compilation would be failed if only applying with this patch. It's not good
>> for git bisect.
> 
> but you could make the patch just to add the 'struct runtime_stat *stat'
> as an argument through the code path..  as a base for the stats, no?
> 
> jirka
> 

Yeah, that might be OK. Let me have a try.

Thanks
Jin Yao