tools/perf/util/evsel.h

   1 #ifndef __PERF_EVSEL_H
   2 #define __PERF_EVSEL_H 1
   3
   4 #include <linux/list.h>
   5 #include <stdbool.h>
   6 #include "../../../include/linux/perf_event.h"
   7 #include "types.h"
   8 #include "xyarray.h"
   9 #include "cgroup.h"
  10 #include "hist.h"
  11
  12 struct perf_counts_values {
  13         union {
  14                 struct {
  15                         u64 val;
  16                         u64 ena;
  17                         u64 run;
  18                 };
  19                 u64 values[3];
  20         };
  21 };
  22
  23 struct perf_counts {
  24         s8                        scaled;
  25         struct perf_counts_values aggr;
  26         struct perf_counts_values cpu[];
  27 };
  28
  29 struct perf_evsel;
  30
  31 /*
  32  * Per fd, to map back from PERF_SAMPLE_ID to evsel, only used when there are
  33  * more than one entry in the evlist.
  34  */
  35 struct perf_sample_id {
  36         struct hlist_node       node;
  37         u64                     id;
  38         struct perf_evsel       *evsel;
  39 };
  40
  41 /** struct perf_evsel - event selector
  42  *
  43  * @name - Can be set to retain the original event name passed by the user,
  44  *         so that when showing results in tools such as 'perf stat', we
  45  *         show the name used, not some alias.
  46  */
  47 struct perf_evsel {
  48         struct list_head        node;
  49         struct perf_event_attr  attr;
  50         char                    *filter;
  51         struct xyarray          *fd;
  52         struct xyarray          *sample_id;
  53         u64                     *id;
  54         struct perf_counts      *counts;
  55         int                     idx;
  56         int                     ids;
  57         struct hists            hists;
  58         char                    *name;
  59         union {
  60                 void            *priv;
  61                 off_t           id_offset;
  62         };
  63         struct cgroup_sel       *cgrp;
  64         struct {
  65                 void            *func;
  66                 void            *data;
  67         } handler;
  68         bool                    supported;
  69 };
  70
  71 struct cpu_map;
  72 struct thread_map;
  73 struct perf_evlist;
  74 struct perf_record_opts;
  75
  76 struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
  77 void perf_evsel__init(struct perf_evsel *evsel,
  78                       struct perf_event_attr *attr, int idx);
  79 void perf_evsel__exit(struct perf_evsel *evsel);
  80 void perf_evsel__delete(struct perf_evsel *evsel);
  81
  82 void perf_evsel__config(struct perf_evsel *evsel,
  83                         struct perf_record_opts *opts,
  84                         struct perf_evsel *first);
  85
  86 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  87 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
  88 int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
  89 void perf_evsel__free_fd(struct perf_evsel *evsel);
  90 void perf_evsel__free_id(struct perf_evsel *evsel);
  91 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  92
  93 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
  94                              struct cpu_map *cpus, bool group,
  95                              struct xyarray *group_fds);
  96 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
  97                                 struct thread_map *threads, bool group,
  98                                 struct xyarray *group_fds);
  99 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
 100                      struct thread_map *threads, bool group,
 101                      struct xyarray *group_fds);
 102 void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads);
 103
 104 #define perf_evsel__match(evsel, t, c)          \
 105         (evsel->attr.type == PERF_TYPE_##t &&   \
 106          evsel->attr.config == PERF_COUNT_##c)
 107
 108 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
 109                               int cpu, int thread, bool scale);
 110
 111 /**
 112  * perf_evsel__read_on_cpu - Read out the results on a CPU and thread
 113  *
 114  * @evsel - event selector to read value
 115  * @cpu - CPU of interest
 116  * @thread - thread of interest
 117  */
 118 static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel,
 119                                           int cpu, int thread)
 120 {
 121         return __perf_evsel__read_on_cpu(evsel, cpu, thread, false);
 122 }
 123
 124 /**
 125  * perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
 126  *
 127  * @evsel - event selector to read value
 128  * @cpu - CPU of interest
 129  * @thread - thread of interest
 130  */
 131 static inline int perf_evsel__read_on_cpu_scaled(struct perf_evsel *evsel,
 132                                                  int cpu, int thread)
 133 {
 134         return __perf_evsel__read_on_cpu(evsel, cpu, thread, true);
 135 }
 136
 137 int __perf_evsel__read(struct perf_evsel *evsel, int ncpus, int nthreads,
 138                        bool scale);
 139
 140 /**
 141  * perf_evsel__read - Read the aggregate results on all CPUs
 142  *
 143  * @evsel - event selector to read value
 144  * @ncpus - Number of cpus affected, from zero
 145  * @nthreads - Number of threads affected, from zero
 146  */
 147 static inline int perf_evsel__read(struct perf_evsel *evsel,
 148                                     int ncpus, int nthreads)
 149 {
 150         return __perf_evsel__read(evsel, ncpus, nthreads, false);
 151 }
 152
 153 /**
 154  * perf_evsel__read_scaled - Read the aggregate results on all CPUs, scaled
 155  *
 156  * @evsel - event selector to read value
 157  * @ncpus - Number of cpus affected, from zero
 158  * @nthreads - Number of threads affected, from zero
 159  */
 160 static inline int perf_evsel__read_scaled(struct perf_evsel *evsel,
 161                                           int ncpus, int nthreads)
 162 {
 163         return __perf_evsel__read(evsel, ncpus, nthreads, true);
 164 }
 165
 166 int __perf_evsel__sample_size(u64 sample_type);
 167
 168 static inline int perf_evsel__sample_size(struct perf_evsel *evsel)
 169 {
 170         return __perf_evsel__sample_size(evsel->attr.sample_type);
 171 }
 172
 173 void hists__init(struct hists *hists);
 174
 175 #endif /* __PERF_EVSEL_H */