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 *sample_id; 53 u64 *id; 54 struct perf_counts *counts; 55 int idx; 56 int ids; 57 struct hists hists; 58 char *name; 59 union { 60 void *priv; 61 off_t id_offset; 62 }; 63 struct cgroup_sel *cgrp; 64 bool supported; 65 }; 66 67 struct cpu_map; 68 struct thread_map; 69 struct perf_evlist; 70 71 struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx); 72 void perf_evsel__init(struct perf_evsel *evsel, 73 struct perf_event_attr *attr, int idx); 74 void perf_evsel__exit(struct perf_evsel *evsel); 75 void perf_evsel__delete(struct perf_evsel *evsel); 76 77 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads); 78 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads); 79 int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus); 80 void perf_evsel__free_fd(struct perf_evsel *evsel); 81 void perf_evsel__free_id(struct perf_evsel *evsel); 82 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads); 83 84 int perf_evsel__open_per_cpu(struct perf_evsel *evsel, 85 struct cpu_map *cpus, bool group, 86 struct xyarray *group_fds); 87 int perf_evsel__open_per_thread(struct perf_evsel *evsel, 88 struct thread_map *threads, bool group, 89 struct xyarray *group_fds); 90 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, 91 struct thread_map *threads, bool group, 92 struct xyarray *group_fds); 93 void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads); 94 95 #define perf_evsel__match(evsel, t, c) \ 96 (evsel->attr.type == PERF_TYPE_##t && \ 97 evsel->attr.config == PERF_COUNT_##c) 98 99 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, 100 int cpu, int thread, bool scale); 101 102 /** 103 * perf_evsel__read_on_cpu - Read out the results on a CPU and thread 104 * 105 * @evsel - event selector to read value 106 * @cpu - CPU of interest 107 * @thread - thread of interest 108 */ 109 static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel, 110 int cpu, int thread) 111 { 112 return __perf_evsel__read_on_cpu(evsel, cpu, thread, false); 113 } 114 115 /** 116 * perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled 117 * 118 * @evsel - event selector to read value 119 * @cpu - CPU of interest 120 * @thread - thread of interest 121 */ 122 static inline int perf_evsel__read_on_cpu_scaled(struct perf_evsel *evsel, 123 int cpu, int thread) 124 { 125 return __perf_evsel__read_on_cpu(evsel, cpu, thread, true); 126 } 127 128 int __perf_evsel__read(struct perf_evsel *evsel, int ncpus, int nthreads, 129 bool scale); 130 131 /** 132 * perf_evsel__read - Read the aggregate results on all CPUs 133 * 134 * @evsel - event selector to read value 135 * @ncpus - Number of cpus affected, from zero 136 * @nthreads - Number of threads affected, from zero 137 */ 138 static inline int perf_evsel__read(struct perf_evsel *evsel, 139 int ncpus, int nthreads) 140 { 141 return __perf_evsel__read(evsel, ncpus, nthreads, false); 142 } 143 144 /** 145 * perf_evsel__read_scaled - Read the aggregate results on all CPUs, scaled 146 * 147 * @evsel - event selector to read value 148 * @ncpus - Number of cpus affected, from zero 149 * @nthreads - Number of threads affected, from zero 150 */ 151 static inline int perf_evsel__read_scaled(struct perf_evsel *evsel, 152 int ncpus, int nthreads) 153 { 154 return __perf_evsel__read(evsel, ncpus, nthreads, true); 155 } 156 157 int __perf_evsel__sample_size(u64 sample_type); 158 159 static inline int perf_evsel__sample_size(struct perf_evsel *evsel) 160 { 161 return __perf_evsel__sample_size(evsel->attr.sample_type); 162 } 163 164 #endif /* __PERF_EVSEL_H */ 165