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          *id;
  53         struct perf_counts      *counts;
  54         int                     idx;
  55         struct hists            hists;
  56         char                    *name;
  57         void                    *priv;
  58         struct cgroup_sel       *cgrp;
  59 };
  60
  61 struct cpu_map;
  62 struct thread_map;
  63 struct perf_evlist;
  64
  65 struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
  66 void perf_evsel__init(struct perf_evsel *evsel,
  67                       struct perf_event_attr *attr, int idx);
  68 void perf_evsel__exit(struct perf_evsel *evsel);
  69 void perf_evsel__delete(struct perf_evsel *evsel);
  70
  71 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  72 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
  73 int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
  74 void perf_evsel__free_fd(struct perf_evsel *evsel);
  75 void perf_evsel__free_id(struct perf_evsel *evsel);
  76 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  77
  78 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
  79                              struct cpu_map *cpus, bool group, bool inherit);
  80 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
  81                                 struct thread_map *threads, bool group, bool inherit);
  82 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
  83                      struct thread_map *threads, bool group, bool inherit);
  84
  85 #define perf_evsel__match(evsel, t, c)          \
  86         (evsel->attr.type == PERF_TYPE_##t &&   \
  87          evsel->attr.config == PERF_COUNT_##c)
  88
  89 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
  90                               int cpu, int thread, bool scale);
  91
  92 /**
  93  * perf_evsel__read_on_cpu - Read out the results on a CPU and thread
  94  *
  95  * @evsel - event selector to read value
  96  * @cpu - CPU of interest
  97  * @thread - thread of interest
  98  */
  99 static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel,
 100                                           int cpu, int thread)
 101 {
 102         return __perf_evsel__read_on_cpu(evsel, cpu, thread, false);
 103 }
 104
 105 /**
 106  * perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
 107  *
 108  * @evsel - event selector to read value
 109  * @cpu - CPU of interest
 110  * @thread - thread of interest
 111  */
 112 static inline int perf_evsel__read_on_cpu_scaled(struct perf_evsel *evsel,
 113                                                  int cpu, int thread)
 114 {
 115         return __perf_evsel__read_on_cpu(evsel, cpu, thread, true);
 116 }
 117
 118 int __perf_evsel__read(struct perf_evsel *evsel, int ncpus, int nthreads,
 119                        bool scale);
 120
 121 /**
 122  * perf_evsel__read - Read the aggregate results on all CPUs
 123  *
 124  * @evsel - event selector to read value
 125  * @ncpus - Number of cpus affected, from zero
 126  * @nthreads - Number of threads affected, from zero
 127  */
 128 static inline int perf_evsel__read(struct perf_evsel *evsel,
 129                                     int ncpus, int nthreads)
 130 {
 131         return __perf_evsel__read(evsel, ncpus, nthreads, false);
 132 }
 133
 134 /**
 135  * perf_evsel__read_scaled - Read the aggregate results on all CPUs, scaled
 136  *
 137  * @evsel - event selector to read value
 138  * @ncpus - Number of cpus affected, from zero
 139  * @nthreads - Number of threads affected, from zero
 140  */
 141 static inline int perf_evsel__read_scaled(struct perf_evsel *evsel,
 142                                           int ncpus, int nthreads)
 143 {
 144         return __perf_evsel__read(evsel, ncpus, nthreads, true);
 145 }
 146
 147 #endif /* __PERF_EVSEL_H */