linux-kernel - Re: [PATCH v1 1/5] perf, tools: Document some missing perf.data headers

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Date:   Mon, 13 Nov 2017 09:54:03 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Andi Kleen <andi@...stfloor.org>
Cc:     acme@...nel.org, jolsa@...nel.org, linux-kernel@...r.kernel.org,
        Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH v1 1/5] perf, tools: Document some missing perf.data
 headers

On Thu, Nov 09, 2017 at 06:55:24AM -0800, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> Document STAT and CACHE header entries.
> 
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>

Acked-by: Jiri Olsa <jolsa@...nel.org>

thanks,
jirka

> ---
>  tools/perf/Documentation/perf.data-file-format.txt | 23 ++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/tools/perf/Documentation/perf.data-file-format.txt b/tools/perf/Documentation/perf.data-file-format.txt
> index e90c59c6d815..15e8b48077ba 100644
> --- a/tools/perf/Documentation/perf.data-file-format.txt
> +++ b/tools/perf/Documentation/perf.data-file-format.txt
> @@ -238,6 +238,29 @@ struct auxtrace_index {
>  	struct auxtrace_index_entry entries[PERF_AUXTRACE_INDEX_ENTRY_COUNT];
>  };
>  
> +	HEADER_STAT = 19,
> +
> +This is merely a flag signifying that the data section contains data
> +recorded from perf stat record.
> +
> +	HEADER_CACHE = 20,
> +
> +Description of the cache hierarchy. Based on the Linux sysfs format
> +in /sys/devices/system/cpu/cpu*/cache/
> +
> +	u32 version	Currently always 1
> +	u32 number_of_cache_levels
> +
> +struct {
> +	u32	level;
> +	u32	line_size;
> +	u32	sets;
> +	u32	ways;
> +	struct perf_header_string type;
> +	struct perf_header_string size;
> +	struct perf_header_string map;
> +}[number_of_cache_levels];
> +
>  	other bits are reserved and should ignored for now
>  	HEADER_FEAT_BITS	= 256,
>  
> -- 
> 2.13.6
>