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