Linux kernel mirror (for testing)
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linux
1#ifndef _PERF_BRANCH_H
2#define _PERF_BRANCH_H 1
3/*
4 * The linux/stddef.h isn't need here, but is needed for __always_inline used
5 * in files included from uapi/linux/perf_event.h such as
6 * /usr/include/linux/swab.h and /usr/include/linux/byteorder/little_endian.h,
7 * detected in at least musl libc, used in Alpine Linux. -acme
8 */
9#include <stdio.h>
10#include <linux/perf_event.h>
11#include <linux/types.h>
12#include "util/map_symbol.h"
13#include "util/sample.h"
14
15struct branch_flags {
16 union {
17 u64 value;
18 struct {
19 u64 mispred:1;
20 u64 predicted:1;
21 u64 in_tx:1;
22 u64 abort:1;
23 u64 cycles:16;
24 u64 type:4;
25 u64 spec:2;
26 u64 new_type:4;
27 u64 priv:3;
28 u64 not_taken:1;
29 u64 reserved:30;
30 };
31 };
32};
33
34struct branch_info {
35 struct addr_map_symbol from;
36 struct addr_map_symbol to;
37 struct branch_flags flags;
38 u64 branch_stack_cntr;
39 char *srcline_from;
40 char *srcline_to;
41};
42
43struct branch_entry {
44 u64 from;
45 u64 to;
46 struct branch_flags flags;
47};
48
49struct branch_stack {
50 u64 nr;
51 u64 hw_idx;
52 struct branch_entry entries[];
53};
54
55/*
56 * The hw_idx is only available when PERF_SAMPLE_BRANCH_HW_INDEX is applied.
57 * Otherwise, the output format of a sample with branch stack is
58 * struct branch_stack {
59 * u64 nr;
60 * struct branch_entry entries[0];
61 * }
62 * Check whether the hw_idx is available,
63 * and return the corresponding pointer of entries[0].
64 */
65static inline struct branch_entry *perf_sample__branch_entries(struct perf_sample *sample)
66{
67 u64 *entry = (u64 *)sample->branch_stack;
68
69 entry++;
70 if (sample->no_hw_idx)
71 return (struct branch_entry *)entry;
72 return (struct branch_entry *)(++entry);
73}
74
75struct branch_type_stat {
76 bool branch_to;
77 u64 counts[PERF_BR_MAX];
78 u64 new_counts[PERF_BR_NEW_MAX];
79 u64 cond_fwd;
80 u64 cond_bwd;
81 u64 cross_4k;
82 u64 cross_2m;
83};
84
85void branch_type_count(struct branch_type_stat *st, struct branch_flags *flags,
86 u64 from, u64 to);
87
88const char *branch_type_name(int type);
89const char *branch_new_type_name(int new_type);
90const char *get_branch_type(struct branch_entry *e);
91void branch_type_stat_display(FILE *fp, const struct branch_type_stat *st);
92int branch_type_str(const struct branch_type_stat *st, char *bf, int bfsize);
93
94const char *branch_spec_desc(int spec);
95
96#endif /* _PERF_BRANCH_H */