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perf: Add new macros for mem_hops field

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Add new macros for mem_hops field which can be used to
represent remote-node, socket and board level details.

Currently the code had macro for HOPS_0, which corresponds
to data coming from another core but same node.
Add new macros for HOPS_1 to HOPS_3 to represent
remote-node, socket and board level data.

For ex: Encodings for mem_hops fields with L2 cache:

L2			- local L2
L2 | REMOTE | HOPS_0	- remote core, same node L2
L2 | REMOTE | HOPS_1	- remote node, same socket L2
L2 | REMOTE | HOPS_2	- remote socket, same board L2
L2 | REMOTE | HOPS_3	- remote board L2

Signed-off-by: Kajol Jain <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
This commit is contained in:
Kajol Jain authored and Michael Ellerman committed 2021-12-16 21:31:44 +11:00
1 parent 708da3ff1d
commit cb1c4aba05
1 file changed
+4 -1
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include/uapi/linux/perf_event.h
+4 -1
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@@ -1332,7 +1332,10 @@ union perf_mem_data_src {
/* hop level */
#define PERF_MEM_HOPS_0 0x01 /* remote core, same node */
/* 2-7 available */
#define PERF_MEM_HOPS_1 0x02 /* remote node, same socket */
#define PERF_MEM_HOPS_2 0x03 /* remote socket, same board */
#define PERF_MEM_HOPS_3 0x04 /* remote board */
/* 5-7 available */
#define PERF_MEM_HOPS_SHIFT 43
#define PERF_MEM_S(a, s) \