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 };
  65
  66 struct cpu_map;
  67 struct thread_map;
  68 struct perf_evlist;
  69
  70 struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
  71 void perf_evsel__init(struct perf_evsel *evsel,
  72                       struct perf_event_attr *attr, int idx);
  73 void perf_evsel__exit(struct perf_evsel *evsel);
  74 void perf_evsel__delete(struct perf_evsel *evsel);
  75
  76 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  77 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
  78 int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
  79 void perf_evsel__free_fd(struct perf_evsel *evsel);
  80 void perf_evsel__free_id(struct perf_evsel *evsel);
  81 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  82
  83 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
  84                              struct cpu_map *cpus, bool group);
  85 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
  86                                 struct thread_map *threads, bool group);
  87 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
  88                      struct thread_map *threads, bool group);
  89
  90 #define perf_evsel__match(evsel, t, c)          \
  91         (evsel->attr.type == PERF_TYPE_##t &&   \
  92          evsel->attr.config == PERF_COUNT_##c)
  93
  94 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
  95                               int cpu, int thread, bool scale);
  96
  97 /**
  98  * perf_evsel__read_on_cpu - Read out the results on a CPU and thread
  99  *
 100  * @evsel - event selector to read value
 101  * @cpu - CPU of interest
 102  * @thread - thread of interest
 103  */
 104 static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel,
 105                                           int cpu, int thread)
 106 {
 107         return __perf_evsel__read_on_cpu(evsel, cpu, thread, false);
 108 }
 109
 110 /**
 111  * perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
 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_scaled(struct perf_evsel *evsel,
 118                                                  int cpu, int thread)
 119 {
 120         return __perf_evsel__read_on_cpu(evsel, cpu, thread, true);
 121 }
 122
 123 int __perf_evsel__read(struct perf_evsel *evsel, int ncpus, int nthreads,
 124                        bool scale);
 125
 126 /**
 127  * perf_evsel__read - Read the aggregate results on all CPUs
 128  *
 129  * @evsel - event selector to read value
 130  * @ncpus - Number of cpus affected, from zero
 131  * @nthreads - Number of threads affected, from zero
 132  */
 133 static inline int perf_evsel__read(struct perf_evsel *evsel,
 134                                     int ncpus, int nthreads)
 135 {
 136         return __perf_evsel__read(evsel, ncpus, nthreads, false);
 137 }
 138
 139 /**
 140  * perf_evsel__read_scaled - Read the aggregate results on all CPUs, scaled
 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_scaled(struct perf_evsel *evsel,
 147                                           int ncpus, int nthreads)
 148 {
 149         return __perf_evsel__read(evsel, ncpus, nthreads, true);
 150 }
 151
 152 #endif /* __PERF_EVSEL_H */