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
  10 struct perf_counts_values {
  11         union {
  12                 struct {
  13                         u64 val;
  14                         u64 ena;
  15                         u64 run;
  16                 };
  17                 u64 values[3];
  18         };
  19 };
  20
  21 struct perf_counts {
  22         s8                        scaled;
  23         struct perf_counts_values aggr;
  24         struct perf_counts_values cpu[];
  25 };
  26
  27 struct perf_evsel;
  28
  29 /*
  30  * Per fd, to map back from PERF_SAMPLE_ID to evsel, only used when there are
  31  * more than one entry in the evlist.
  32  */
  33 struct perf_sample_id {
  34         struct hlist_node       node;
  35         u64                     id;
  36         struct perf_evsel       *evsel;
  37 };
  38
  39 struct perf_evsel {
  40         struct list_head        node;
  41         struct perf_event_attr  attr;
  42         char                    *filter;
  43         struct xyarray          *fd;
  44         struct xyarray          *id;
  45         struct perf_counts      *counts;
  46         int                     idx;
  47         void                    *priv;
  48 };
  49
  50 struct cpu_map;
  51 struct thread_map;
  52 struct perf_evlist;
  53
  54 struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
  55 void perf_evsel__init(struct perf_evsel *evsel,
  56                       struct perf_event_attr *attr, int idx);
  57 void perf_evsel__exit(struct perf_evsel *evsel);
  58 void perf_evsel__delete(struct perf_evsel *evsel);
  59
  60 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  61 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
  62 int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
  63 int perf_evlist__alloc_mmap(struct perf_evlist *evlist, int ncpus);
  64 void perf_evsel__free_fd(struct perf_evsel *evsel);
  65 void perf_evsel__free_id(struct perf_evsel *evsel);
  66 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  67
  68 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
  69                              struct cpu_map *cpus, bool group, bool inherit);
  70 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
  71                                 struct thread_map *threads, bool group, bool inherit);
  72 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
  73                      struct thread_map *threads, bool group, bool inherit);
  74 int perf_evlist__mmap(struct perf_evlist *evlist, struct cpu_map *cpus,
  75                       struct thread_map *threads, int pages, bool overwrite);
  76 void perf_evlist__munmap(struct perf_evlist *evlist, int ncpus);
  77
  78 #define perf_evsel__match(evsel, t, c)          \
  79         (evsel->attr.type == PERF_TYPE_##t &&   \
  80          evsel->attr.config == PERF_COUNT_##c)
  81
  82 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
  83                               int cpu, int thread, bool scale);
  84
  85 /**
  86  * perf_evsel__read_on_cpu - Read out the results on a CPU and thread
  87  *
  88  * @evsel - event selector to read value
  89  * @cpu - CPU of interest
  90  * @thread - thread of interest
  91  */
  92 static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel,
  93                                           int cpu, int thread)
  94 {
  95         return __perf_evsel__read_on_cpu(evsel, cpu, thread, false);
  96 }
  97
  98 /**
  99  * perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
 100  *
 101  * @evsel - event selector to read value
 102  * @cpu - CPU of interest
 103  * @thread - thread of interest
 104  */
 105 static inline int perf_evsel__read_on_cpu_scaled(struct perf_evsel *evsel,
 106                                                  int cpu, int thread)
 107 {
 108         return __perf_evsel__read_on_cpu(evsel, cpu, thread, true);
 109 }
 110
 111 int __perf_evsel__read(struct perf_evsel *evsel, int ncpus, int nthreads,
 112                        bool scale);
 113
 114 /**
 115  * perf_evsel__read - Read the aggregate results on all CPUs
 116  *
 117  * @evsel - event selector to read value
 118  * @ncpus - Number of cpus affected, from zero
 119  * @nthreads - Number of threads affected, from zero
 120  */
 121 static inline int perf_evsel__read(struct perf_evsel *evsel,
 122                                     int ncpus, int nthreads)
 123 {
 124         return __perf_evsel__read(evsel, ncpus, nthreads, false);
 125 }
 126
 127 /**
 128  * perf_evsel__read_scaled - Read the aggregate results on all CPUs, scaled
 129  *
 130  * @evsel - event selector to read value
 131  * @ncpus - Number of cpus affected, from zero
 132  * @nthreads - Number of threads affected, from zero
 133  */
 134 static inline int perf_evsel__read_scaled(struct perf_evsel *evsel,
 135                                           int ncpus, int nthreads)
 136 {
 137         return __perf_evsel__read(evsel, ncpus, nthreads, true);
 138 }
 139
 140 #endif /* __PERF_EVSEL_H */