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| author | Thomas Richter <tmricht@linux.ibm.com> | 2018-05-28 09:44:33 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-05-30 20:39:13 +0200 |
| commit | 0c711138fa61188aa379210e9e08ac76838dea03 (patch) | |
| tree | 9f07631e7aa319dcd14a1af6f445842dc8e8bf4c /tools/perf/Documentation | |
| parent | perf cs-etm: Fix indexing for decoder packet queue (diff) | |
| download | linux-0c711138fa61188aa379210e9e08ac76838dea03.tar.xz linux-0c711138fa61188aa379210e9e08ac76838dea03.zip | |
perf data: Update documentation section on cpu topology
Add an explanation of each cpu's core and socket identifier to the
perf.data file format documentation.
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Link: http://lkml.kernel.org/r/20180528074433.16652-1-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf.data-file-format.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf.data-file-format.txt b/tools/perf/Documentation/perf.data-file-format.txt index d00f0d51cab8..c57904a526ce 100644 --- a/tools/perf/Documentation/perf.data-file-format.txt +++ b/tools/perf/Documentation/perf.data-file-format.txt @@ -153,10 +153,18 @@ struct { HEADER_CPU_TOPOLOGY = 13, String lists defining the core and CPU threads topology. +The string lists are followed by a variable length array +which contains core_id and socket_id of each cpu. +The number of entries can be determined by the size of the +section minus the sizes of both string lists. struct { struct perf_header_string_list cores; /* Variable length */ struct perf_header_string_list threads; /* Variable length */ + struct { + uint32_t core_id; + uint32_t socket_id; + } cpus[nr]; /* Variable length records */ }; Example: |