Re: [PATCH 13/23] perf tools: Introduce perf.data version 3 format
From: Namhyung Kim
Date: Fri Jul 19 2013 - 08:06:28 EST
On Wed, 17 Jul 2013 19:49:53 +0200, Jiri Olsa wrote:
> Introducing perf.data version 3 format. No functional change,
> just introducing doc, magic bytes and the struct.
>
[SNIP]
> +perf-data-file-v3(1)
s/(1)/(5)/
The same goes to v2 doc.
> +====================
> +Following text describes version 3 of the perf data file format,
> +which is version that is currently used by perf tool.
> +
> +In version 3 we got rid of following sections:
> + EVENT IDS
> + EVENT ATTRIBUTES
> + EVENT TYPES
> +
> +and keep only data and features sections. All the data
> +from above listed sections are now read from specific
> +FEATURES sections.
> +
> +benefits:
> + - siplified header storage at the time the file is closed
s/siplified/simplified/
> + - allowing cpu hotpluged addition/removal event IDs
> + during the session due to 1)
What is 1) ?
Thanks,
Namhyung
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