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 {
  41         struct list_head        node;
  42         struct perf_event_attr  attr;
  43         char                    *filter;
  44         struct xyarray          *fd;
  45         struct xyarray          *id;
  46         struct perf_counts      *counts;
  47         int                     idx;
  48         void                    *priv;
  49         struct cgroup_sel       *cgrp;
  50 };
  51
  52 struct cpu_map;
  53 struct thread_map;
  54 struct perf_evlist;
  55
  56 struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
  57 void perf_evsel__init(struct perf_evsel *evsel,
  58                       struct perf_event_attr *attr, int idx);
  59 void perf_evsel__exit(struct perf_evsel *evsel);
  60 void perf_evsel__delete(struct perf_evsel *evsel);
  61
  62 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  63 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
  64 int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
  65 void perf_evsel__free_fd(struct perf_evsel *evsel);
  66 void perf_evsel__free_id(struct perf_evsel *evsel);
  67 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  68
  69 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
  70                              struct cpu_map *cpus, bool group, bool inherit);
  71 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
  72                                 struct thread_map *threads, bool group, bool inherit);
  73 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
  74                      struct thread_map *threads, bool group, bool inherit);
  75
  76 #define perf_evsel__match(evsel, t, c)          \
  77         (evsel->attr.type == PERF_TYPE_##t &&   \
  78          evsel->attr.config == PERF_COUNT_##c)
  79
  80 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
  81                               int cpu, int thread, bool scale);
  82
  83 /**
  84  * perf_evsel__read_on_cpu - Read out the results on a CPU and thread
  85  *
  86  * @evsel - event selector to read value
  87  * @cpu - CPU of interest
  88  * @thread - thread of interest
  89  */
  90 static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel,
  91                                           int cpu, int thread)
  92 {
  93         return __perf_evsel__read_on_cpu(evsel, cpu, thread, false);
  94 }
  95
  96 /**
  97  * perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
  98  *
  99  * @evsel - event selector to read value
 100  * @cpu - CPU of interest
 101  * @thread - thread of interest
 102  */
 103 static inline int perf_evsel__read_on_cpu_scaled(struct perf_evsel *evsel,
 104                                                  int cpu, int thread)
 105 {
 106         return __perf_evsel__read_on_cpu(evsel, cpu, thread, true);
 107 }
 108
 109 int __perf_evsel__read(struct perf_evsel *evsel, int ncpus, int nthreads,
 110                        bool scale);
 111
 112 /**
 113  * perf_evsel__read - Read the aggregate results on all CPUs
 114  *
 115  * @evsel - event selector to read value
 116  * @ncpus - Number of cpus affected, from zero
 117  * @nthreads - Number of threads affected, from zero
 118  */
 119 static inline int perf_evsel__read(struct perf_evsel *evsel,
 120                                     int ncpus, int nthreads)
 121 {
 122         return __perf_evsel__read(evsel, ncpus, nthreads, false);
 123 }
 124
 125 /**
 126  * perf_evsel__read_scaled - Read the aggregate results on all CPUs, scaled
 127  *
 128  * @evsel - event selector to read value
 129  * @ncpus - Number of cpus affected, from zero
 130  * @nthreads - Number of threads affected, from zero
 131  */
 132 static inline int perf_evsel__read_scaled(struct perf_evsel *evsel,
 133                                           int ncpus, int nthreads)
 134 {
 135         return __perf_evsel__read(evsel, ncpus, nthreads, true);
 136 }
 137
 138 #endif /* __PERF_EVSEL_H */