On Wed, Jan 27, 2021 at 07:38:41AM -0800, kan.liang@xxxxxxxxxxxxxxx wrote:
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index b15e344..13b4019 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -145,12 +145,14 @@ enum perf_event_sample_format {
PERF_SAMPLE_CGROUP = 1U << 21,
PERF_SAMPLE_DATA_PAGE_SIZE = 1U << 22,
PERF_SAMPLE_CODE_PAGE_SIZE = 1U << 23,
+ PERF_SAMPLE_WEIGHT_STRUCT = 1U << 24,
- PERF_SAMPLE_MAX = 1U << 24, /* non-ABI */
+ PERF_SAMPLE_MAX = 1U << 25, /* non-ABI */
__PERF_SAMPLE_CALLCHAIN_EARLY = 1ULL << 63, /* non-ABI; internal use */
};
+#define PERF_SAMPLE_WEIGHT_TYPE (PERF_SAMPLE_WEIGHT | PERF_SAMPLE_WEIGHT_STRUCT)
/*
* values to program into branch_sample_type when PERF_SAMPLE_BRANCH is set
*
@@ -890,7 +892,16 @@ enum perf_event_type {
* char data[size];
* u64 dyn_size; } && PERF_SAMPLE_STACK_USER
*
- * { u64 weight; } && PERF_SAMPLE_WEIGHT
+ * { union perf_sample_weight
+ * {
+ * u64 full; && PERF_SAMPLE_WEIGHT
+ * struct {
+ * u32 low_dword;
+ * u16 high_word;
+ * u16 higher_word;
+ * } && PERF_SAMPLE_WEIGHT_STRUCT
+ * }
+ * }
* { u64 data_src; } && PERF_SAMPLE_DATA_SRC
* { u64 transaction; } && PERF_SAMPLE_TRANSACTION
* { u64 abi; # enum perf_sample_regs_abi
@@ -1248,4 +1259,13 @@ struct perf_branch_entry {
reserved:40;
};
+union perf_sample_weight {
+ __u64 full;
+ struct {
+ __u32 low_dword;
+ __u16 high_word;
+ __u16 higher_word;
+ };
+};
*urgh*, my naming lives ... anybody got a better suggestion?
Also, do we want to care about byte order?