linux-kernel - Re: [PATCH v2 0/5] perf tools: add meta-data header support in pipe mode

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Date:	Wed, 16 May 2012 11:32:31 +0900
From:	Namhyung Kim <namhyung.kim@....com>
To:	David Ahern <dsahern@...il.com>
Cc:	Stephane Eranian <eranian@...gle.com>,
	linux-kernel@...r.kernel.org, peterz@...radead.org, mingo@...e.hu,
	acme@...hat.com
Subject: Re: [PATCH v2 0/5] perf tools: add meta-data header support in pipe mode

Hi,

On Tue, 15 May 2012 20:05:06 -0600, David Ahern wrote:
> On 5/15/12 7:34 PM, Namhyung Kim wrote:
>> Hi, Stephane
>>
>> On Tue, 15 May 2012 13:28:10 +0200, Stephane Eranian wrote:
>>> This patch series adds meta-data support to perf record/report in pipe
>>> mode:
>>> 	perf record -o - foo | perf inject -b | perf report -i -
>>>
>>> We had meta-data (information about host configuration, perf tool version,...)
>>> in regular (file) mode but it was lacking in pipe mode. This patch series fixes
>>> this.
>>>
>>
>> In addition to this change, I think it'd be great if we keep this
>> meta-data somewhere for later use - I guess perf report and
>> annotate on TUI, at least, will need it too. Just a suggestion :).
>>
>> Thanks,
>> Namhyung
>>
>
> It is there -- see perf-report header. It gets dropped on pipe mode
> b/c the meta-data is in the header.
>
> David

Do you mean this?

struct perf_report {
	struct perf_tool	tool;
	struct perf_session	*session;
	char const		*input_name;
	bool			force, use_tui, use_gtk, use_stdio;
	bool			hide_unresolved;
	bool			dont_use_callchains;
	bool			show_full_info;
	bool			show_threads;
	bool			inverted_callchain;
	struct perf_read_values	show_threads_values;
	const char		*pretty_printing_style;
	symbol_filter_t		annotate_init;
	const char		*cpu_list;
	const char		*symbol_filter_str;
	DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
};

Thanks,
Namhyung
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