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perf: Add comment about current state of PERF_MEM_LVL_* namespace and remove an extra line

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Add a comment about PERF_MEM_LVL_* namespace being depricated
to some extent in favour of added PERF_MEM_{LVLNUM_,REMOTE_,SNOOPX_}
fields.

Remove an extra line present in perf_mem__lvl_scnprintf function.

Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20211006140654.298352-2-kjain@linux.ibm.com
This commit is contained in:
Kajol Jain 2021-10-06 19:36:51 +05:30 • committed by Peter Zijlstra
parent 79df45731d
commit f4c6217f7f
3 changed files with 14 additions and 3 deletions
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8
tools/include/uapi/linux/perf_event.h
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@ -1241,7 +1241,13 @@ union perf_mem_data_src {
#define PERF_MEM_OP_EXEC 0x10 /* code (execution) */
#define PERF_MEM_OP_SHIFT 0
/* memory hierarchy (memory level, hit or miss) */
/*
* PERF_MEM_LVL_* namespace being depricated to some extent in the
* favour of newer composite PERF_MEM_{LVLNUM_,REMOTE_,SNOOPX_} fields.
* Supporting this namespace inorder to not break defined ABIs.
*
* memory hierarchy (memory level, hit or miss)
*/
#define PERF_MEM_LVL_NA 0x01 /* not available */
#define PERF_MEM_LVL_HIT 0x02 /* hit level */
#define PERF_MEM_LVL_MISS 0x04 /* miss level */