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         struct list_head        node;
  29         struct perf_event_attr  attr;
  30         char                    *filter;
  31         struct xyarray          *fd;
  32         struct perf_counts      *counts;
  33         int                     idx;
  34         void                    *priv;
  35 };
  36
  37 struct cpu_map;
  38 struct thread_map;
  39
  40 struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
  41 void perf_evsel__delete(struct perf_evsel *evsel);
  42
  43 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  44 int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
  45 void perf_evsel__free_fd(struct perf_evsel *evsel);
  46 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
  47
  48 int perf_evsel__open_per_cpu(struct perf_evsel *evsel, struct cpu_map *cpus);
  49 int perf_evsel__open_per_thread(struct perf_evsel *evsel, struct thread_map *threads);
  50 int perf_evsel__open(struct perf_evsel *evsel,
  51                      struct cpu_map *cpus, struct thread_map *threads);
  52
  53 #define perf_evsel__match(evsel, t, c)          \
  54         (evsel->attr.type == PERF_TYPE_##t &&   \
  55          evsel->attr.config == PERF_COUNT_##c)
  56
  57 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
  58                               int cpu, int thread, bool scale);
  59
  60 /**
  61  * perf_evsel__read_on_cpu - Read out the results on a CPU and thread
  62  *
  63  * @evsel - event selector to read value
  64  * @cpu - CPU of interest
  65  * @thread - thread of interest
  66  */
  67 static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel,
  68                                           int cpu, int thread)
  69 {
  70         return __perf_evsel__read_on_cpu(evsel, cpu, thread, false);
  71 }
  72
  73 /**
  74  * perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
  75  *
  76  * @evsel - event selector to read value
  77  * @cpu - CPU of interest
  78  * @thread - thread of interest
  79  */
  80 static inline int perf_evsel__read_on_cpu_scaled(struct perf_evsel *evsel,
  81                                                  int cpu, int thread)
  82 {
  83         return __perf_evsel__read_on_cpu(evsel, cpu, thread, true);
  84 }
  85
  86 int __perf_evsel__read(struct perf_evsel *evsel, int ncpus, int nthreads,
  87                        bool scale);
  88
  89 /**
  90  * perf_evsel__read - Read the aggregate results on all CPUs
  91  *
  92  * @evsel - event selector to read value
  93  * @ncpus - Number of cpus affected, from zero
  94  * @nthreads - Number of threads affected, from zero
  95  */
  96 static inline int perf_evsel__read(struct perf_evsel *evsel,
  97                                     int ncpus, int nthreads)
  98 {
  99         return __perf_evsel__read(evsel, ncpus, nthreads, false);
 100 }
 101
 102 /**
 103  * perf_evsel__read_scaled - Read the aggregate results on all CPUs, scaled
 104  *
 105  * @evsel - event selector to read value
 106  * @ncpus - Number of cpus affected, from zero
 107  * @nthreads - Number of threads affected, from zero
 108  */
 109 static inline int perf_evsel__read_scaled(struct perf_evsel *evsel,
 110                                           int ncpus, int nthreads)
 111 {
 112         return __perf_evsel__read(evsel, ncpus, nthreads, true);
 113 }
 114
 115 #endif /* __PERF_EVSEL_H */