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

2017-05-18 Thread David Carrillo-Cisneros 
On Wed, May 17, 2017 at 10:10 PM, Andi Kleen  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.

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

2017-05-18 Thread David Carrillo-Cisneros 
On Wed, May 17, 2017 at 10:10 PM, Andi Kleen  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.

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

2017-05-17 Thread Andi Kleen 
> 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

-Andi

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

2017-05-17 Thread Andi Kleen 
> 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

-Andi