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

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Message-ID: <4FB30B52.7080104@gmail.com>
Date:	Tue, 15 May 2012 20:05:06 -0600
From:	David Ahern <dsahern@...il.com>
To:	Namhyung Kim <namhyung.kim@....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

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
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