linux-kernel - Re: [PATCH 13/23] perf tools: Introduce perf.data version 3 format

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Message-ID: <877ggmwy81.fsf@sejong.aot.lge.com>
Date:	Fri, 19 Jul 2013 21:06:22 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Andi Kleen <ak@...ux.intel.com>,
	David Ahern <dsahern@...il.com>
Subject: Re: [PATCH 13/23] perf tools: Introduce perf.data version 3 format

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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