tools/perf/util/branch.h

   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 <stdint.h>
  11 #include <linux/compiler.h>
  12 #include <linux/stddef.h>
  13 #include <linux/perf_event.h>
  14 #include <linux/types.h>
  15 #include "event.h"
  16
  17 struct branch_flags {
  18         union {
  19                 u64 value;
  20                 struct {
  21                         u64 mispred:1;
  22                         u64 predicted:1;
  23                         u64 in_tx:1;
  24                         u64 abort:1;
  25                         u64 cycles:16;
  26                         u64 type:4;
  27                         u64 reserved:40;
  28                 };
  29         };
  30 };
  31
  32 struct branch_info {
  33         struct addr_map_symbol from;
  34         struct addr_map_symbol to;
  35         struct branch_flags    flags;
  36         char                   *srcline_from;
  37         char                   *srcline_to;
  38 };
  39
  40 struct branch_entry {
  41         u64                     from;
  42         u64                     to;
  43         struct branch_flags     flags;
  44 };
  45
  46 struct branch_stack {
  47         u64                     nr;
  48         u64                     hw_idx;
  49         struct branch_entry     entries[];
  50 };
  51
  52 /*
  53  * The hw_idx is only available when PERF_SAMPLE_BRANCH_HW_INDEX is applied.
  54  * Otherwise, the output format of a sample with branch stack is
  55  * struct branch_stack {
  56  *      u64                     nr;
  57  *      struct branch_entry     entries[0];
  58  * }
  59  * Check whether the hw_idx is available,
  60  * and return the corresponding pointer of entries[0].
  61  */
  62 static inline struct branch_entry *perf_sample__branch_entries(struct perf_sample *sample)
  63 {
  64         u64 *entry = (u64 *)sample->branch_stack;
  65
  66         entry++;
  67         if (sample->no_hw_idx)
  68                 return (struct branch_entry *)entry;
  69         return (struct branch_entry *)(++entry);
  70 }
  71
  72 struct branch_type_stat {
  73         bool    branch_to;
  74         u64     counts[PERF_BR_MAX];
  75         u64     cond_fwd;
  76         u64     cond_bwd;
  77         u64     cross_4k;
  78         u64     cross_2m;
  79 };
  80
  81 void branch_type_count(struct branch_type_stat *st, struct branch_flags *flags,
  82                        u64 from, u64 to);
  83
  84 const char *branch_type_name(int type);
  85 void branch_type_stat_display(FILE *fp, struct branch_type_stat *st);
  86 int branch_type_str(struct branch_type_stat *st, char *bf, int bfsize);
  87
  88 #endif /* _PERF_BRANCH_H */