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
  85 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  86 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
  87 int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
  88 void perf_evsel__free_fd(struct perf_evsel *evsel);
  89 void perf_evsel__free_id(struct perf_evsel *evsel);
  90 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  91
  92 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
  93                              struct cpu_map *cpus, bool group,
  94                              struct xyarray *group_fds);
  95 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
  96                                 struct thread_map *threads, bool group,
  97                                 struct xyarray *group_fds);
  98 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
  99                      struct thread_map *threads, bool group,
 100                      struct xyarray *group_fds);
 101 void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads);
 102
 103 #define perf_evsel__match(evsel, t, c)          \
 104         (evsel->attr.type == PERF_TYPE_##t &&   \
 105          evsel->attr.config == PERF_COUNT_##c)
 106
 107 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
 108                               int cpu, int thread, bool scale);
 109
 110 /**
 111  * perf_evsel__read_on_cpu - Read out the results on a CPU and thread
 112  *
 113  * @evsel - event selector to read value
 114  * @cpu - CPU of interest
 115  * @thread - thread of interest
 116  */
 117 static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel,
 118                                           int cpu, int thread)
 119 {
 120         return __perf_evsel__read_on_cpu(evsel, cpu, thread, false);
 121 }
 122
 123 /**
 124  * perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
 125  *
 126  * @evsel - event selector to read value
 127  * @cpu - CPU of interest
 128  * @thread - thread of interest
 129  */
 130 static inline int perf_evsel__read_on_cpu_scaled(struct perf_evsel *evsel,
 131                                                  int cpu, int thread)
 132 {
 133         return __perf_evsel__read_on_cpu(evsel, cpu, thread, true);
 134 }
 135
 136 int __perf_evsel__read(struct perf_evsel *evsel, int ncpus, int nthreads,
 137                        bool scale);
 138
 139 /**
 140  * perf_evsel__read - Read the aggregate results on all CPUs
 141  *
 142  * @evsel - event selector to read value
 143  * @ncpus - Number of cpus affected, from zero
 144  * @nthreads - Number of threads affected, from zero
 145  */
 146 static inline int perf_evsel__read(struct perf_evsel *evsel,
 147                                     int ncpus, int nthreads)
 148 {
 149         return __perf_evsel__read(evsel, ncpus, nthreads, false);
 150 }
 151
 152 /**
 153  * perf_evsel__read_scaled - Read the aggregate results on all CPUs, scaled
 154  *
 155  * @evsel - event selector to read value
 156  * @ncpus - Number of cpus affected, from zero
 157  * @nthreads - Number of threads affected, from zero
 158  */
 159 static inline int perf_evsel__read_scaled(struct perf_evsel *evsel,
 160                                           int ncpus, int nthreads)
 161 {
 162         return __perf_evsel__read(evsel, ncpus, nthreads, true);
 163 }
 164
 165 int __perf_evsel__sample_size(u64 sample_type);
 166
 167 static inline int perf_evsel__sample_size(struct perf_evsel *evsel)
 168 {
 169         return __perf_evsel__sample_size(evsel->attr.sample_type);
 170 }
 171
 172 #endif /* __PERF_EVSEL_H */