Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0c711138 authored by Thomas Richter's avatar Thomas Richter Committed by Arnaldo Carvalho de Melo
Browse files

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: default avatarThomas 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent e2ab2852

tools/perf/Documentation/perf.data-file-format.txt

+8 −0
Original line number Diff line number Diff line
@@ -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: