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perf tools: Document some missing perf.data headers 

Document STAT and CACHE header entries.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20171109145528.23371-2-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2017-11-09 06:55:24 -08:00 committed by Arnaldo Carvalho de Melo
parent 4359dd88af
commit 35c0a81a97
1 changed files with 23 additions and 0 deletions
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23
tools/perf/Documentation/perf.data-file-format.txt
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@ -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,