linux-kernel - Re: [PATCH v5 7/7] perf report: Sort by sampled cycles percent per block for tui

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Date:   Fri, 1 Nov 2019 21:05:15 +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 v5 7/7] perf report: Sort by sampled cycles percent per
 block for tui



On 11/1/2019 4:34 PM, Jiri Olsa wrote:
> On Wed, Oct 30, 2019 at 02:04:30PM +0800, Jin Yao wrote:
> 
> SNIP
> 
>> +
>>   static int perf_evlist__tty_browse_hists(struct evlist *evlist,
>>   					 struct report *rep,
>>   					 const char *help)
>> @@ -605,6 +624,11 @@ static int report__browse_hists(struct report *rep)
>>   
>>   	switch (use_browser) {
>>   	case 1:
>> +		if (rep->total_cycles_mode) {
>> +			ret = perf_evlist__tui_block_hists_browse(evlist, rep);
>> +			break;
>> +		}
> 
> does this have sense only for cycles event? what if I do:
>    # perf record -b -e cycles,cache-misses
> 
> jirka
> 

It can report both cycles and cache-misses. But I use a simple way.

When I run 'perf report --total-cycles', it displays the window for the 
first event ('cycles') by default. For example,

# Samples: 8384 of event 'cycles'
Sampled Cycles%  Sampled Cycles  Avg Cycles%  Avg Cycles
...

Once I press 'q' to quit current window, it then switches to another 
window for the second event ('cache-misses'). For example,

# Samples: 7072 of event 'cache-misses'
Sampled Cycles%  Sampled Cycles  Avg Cycles%  Avg Cycles
...

Thanks
Jin Yao

>> +
>>   		ret = perf_evlist__tui_browse_hists(evlist, help, NULL,
>>   						    rep->min_percent,
>>   						    &session->header.env,
>> @@ -1408,12 +1432,8 @@ int cmd_report(int argc, const char **argv)
>>   	if (report.total_cycles_mode) {
>>   		if (sort__mode != SORT_MODE__BRANCH)
>>   			report.total_cycles_mode = false;
>> -		else if (!report.use_stdio) {
>> -			pr_err("Error: --total-cycles can be only used together with --stdio\n");
>> -			goto error;
>> -		} else {
>> +		else
>>   			sort_order = "sym";
>> -		}
>>   	}
>>   
>>   	if (strcmp(input_name, "-") != 0)
> 
> SNIP
>