linux-kernel - Re: [PATCH 01/21] perf tools: Introduce struct hist_entry

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Date:	Mon, 27 Jan 2014 14:41:43 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Arun Sharma <asharma@...com>,
	Rodrigo Campos <rodrigo@...g.com.ar>,
	Andi Kleen <andi@...stfloor.org>,
	David Ahern <dsahern@...il.com>,
	Stephane Eranian <eranian@...gle.com>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH 01/21] perf tools: Introduce struct hist_entry_iter

On Thu, 23 Jan 2014 15:44:00 +0100, Jiri Olsa wrote:
> On Thu, Jan 23, 2014 at 09:13:45AM +0900, Namhyung Kim wrote:
>> There're some duplicate code when adding hist entries.  They are
>> different in that some have branch info or mem info but generally do
>> same thing.  So introduce new struct hist_entry_iter and add callbacks
>> to customize each case in general way.
>> 
>> The new perf_evsel__add_entry() function will look like:
>> 
>>   iter->prepare_entry();
>>   iter->add_single_entry();
>> 
>>   while (iter->next_entry())
>>     iter->add_next_entry();
>> 
>>   iter->finish_entry();
>> 
>> This will help further work like the cumulative callchain patchset.

[SNIP]
>> -	if (rep->hide_unresolved && !al->sym)
>> -		return 0;
>
> this check seems to be missing in iter_add_single_mem_entry

Right.  But afaics it's duplicate as we already check it in
process_sample_event().

Thanks,
Namhyung
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