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authorKajol Jain <kjain@linux.ibm.com>2021-10-06 17:06:52 +0300
committerPeter Zijlstra <peterz@infradead.org>2021-10-19 18:27:00 +0300
commitfec9cc6175d0ec1e13efe12be491d9bd4de62f80 (patch)
tree9b8a67ded05627d043b97f879a78fa6ffd7e21c9 /include/uapi/linux/perf_event.h
parentf4c6217f7f5936f7173d028559ff5d25cce10816 (diff)
downloadlinux-fec9cc6175d0ec1e13efe12be491d9bd4de62f80.tar.xz
perf: Add mem_hops field in perf_mem_data_src structure
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 Signed-off-by: Kajol Jain <kjain@linux.ibm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20211006140654.298352-3-kjain@linux.ibm.com
Diffstat (limited to 'include/uapi/linux/perf_event.h')
-rw-r--r--include/uapi/linux/perf_event.h11
1 files changed, 9 insertions, 2 deletions
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index a74538c5b4b5..bd8860eeb291 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -1225,14 +1225,16 @@ union perf_mem_data_src {
mem_remote:1, /* remote */
mem_snoopx:2, /* snoop mode, ext */
mem_blk:3, /* access blocked */
- mem_rsvd:21;
+ mem_hops:3, /* hop level */
+ mem_rsvd:18;
};
};
#elif defined(__BIG_ENDIAN_BITFIELD)
union perf_mem_data_src {
__u64 val;
struct {
- __u64 mem_rsvd:21,
+ __u64 mem_rsvd:18,
+ mem_hops:3, /* hop level */
mem_blk:3, /* access blocked */
mem_snoopx:2, /* snoop mode, ext */
mem_remote:1, /* remote */
@@ -1328,6 +1330,11 @@ union perf_mem_data_src {
#define PERF_MEM_BLK_ADDR 0x04 /* address conflict */
#define PERF_MEM_BLK_SHIFT 40
+/* hop level */
+#define PERF_MEM_HOPS_0 0x01 /* remote core, same node */
+/* 2-7 available */
+#define PERF_MEM_HOPS_SHIFT 43
+
#define PERF_MEM_S(a, s) \
(((__u64)PERF_MEM_##a##_##s) << PERF_MEM_##a##_SHIFT)