Re: [PATCH 0/7] perf tool: add meta-data header support for pipe-mode

[David Carrillo-Cisneros]

On Wed, May 17, 2017 at 10:10 PM, Andi Kleen <ak@xxxxxxxxxxxxxxx> wrote:
>> The difficulty in pipe mode is that information needs to be written
>> sequentially to the pipe. Meta data headers are usually generated
>> (and also expected) at the beginning of the file (or piped output).
>> To solve this problem, we introduce new synthetic record types,
>> one for each meta-data type. The approach is similar to what
>> is *ALREADY* used for BUILD_ID and TRACING_DATA.
>
> The new headers need documentation in Documentation/perf.data-file-format.txt
Will do.