Going forward, future generation systems can have more hierarchy within the node/package level but currently we don't have any data source encoding field in perf, which can be used to represent this level of data. Add a new field called 'mem_hops' in the perf_mem_data_src structure which can be used to represent intra-node/package or inter-node/off-package details. This field is of size 3 bits where PERF_MEM_HOPS_{NA, 0..6} value can be used to present different hop levels data. Also add corresponding macros to define mem_hop field values and shift value. Currently we define macro for HOPS_0 which corresponds to data coming from another core but same node. For ex: Encodings for mem_hops fields with L2 cache: L2 - local L2 L2 | REMOTE | HOPS_0 - remote core, same node L2
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| @@ -1225,14 +1225,16 @@ union perf_mem_data_src { · 1224 unmodified lines | ||
| 1225 | 1225 | mem_remote:1, /* remote */ |
| 1226 | 1226 | mem_snoopx:2, /* snoop mode, ext */ |
| 1227 | 1227 | mem_blk:3, /* access blocked */ |
| 1228 | − mem_rsvd:21; | |
| 1228 | + mem_hops:3, /* hop level */ | |
| 1229 | + mem_rsvd:18; | |
| 1229 | 1230 | }; |
| 1230 | 1231 | }; |
| 1231 | 1232 | #elif defined(__BIG_ENDIAN_BITFIELD) |
| 1232 | 1233 | union perf_mem_data_src { |
| 1233 | 1234 | __u64 val; |
| 1234 | 1235 | struct { |
| 1235 | − __u64 mem_rsvd:21, | |
| 1236 | + __u64 mem_rsvd:18, | |
| 1237 | + mem_hops:3, /* hop level */ | |
| 1236 | 1238 | mem_blk:3, /* access blocked */ |
| 1237 | 1239 | mem_snoopx:2, /* snoop mode, ext */ |
| 1238 | 1240 | mem_remote:1, /* remote */ |
| @@ -1328,6 +1330,11 @@ union perf_mem_data_src { · 89 unmodified lines | ||
| 1328 | 1330 | #define PERF_MEM_BLK_ADDR 0x04 /* address conflict */ |
| 1329 | 1331 | #define PERF_MEM_BLK_SHIFT 40 |
| 1330 | 1332 | |
| 1333 | +/* hop level */ | |
| 1334 | +#define PERF_MEM_HOPS_0 0x01 /* remote core, same node */ | |
| 1335 | +/* 2-7 available */ | |
| 1336 | +#define PERF_MEM_HOPS_SHIFT 43 | |
| 1337 | + | |
| 1331 | 1338 | #define PERF_MEM_S(a, s) \ |
| 1332 | 1339 | (((__u64)PERF_MEM_##a##_##s) << PERF_MEM_##a##_SHIFT) |
| 1333 | 1340 | |