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 }; 65 66 struct cpu_map; 67 struct thread_map; 68 struct perf_evlist; 69 70 struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx); 71 void perf_evsel__init(struct perf_evsel *evsel, 72 struct perf_event_attr *attr, int idx); 73 void perf_evsel__exit(struct perf_evsel *evsel); 74 void perf_evsel__delete(struct perf_evsel *evsel); 75 76 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads); 77 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads); 78 int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus); 79 void perf_evsel__free_fd(struct perf_evsel *evsel); 80 void perf_evsel__free_id(struct perf_evsel *evsel); 81 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads); 82 83 int perf_evsel__open_per_cpu(struct perf_evsel *evsel, 84 struct cpu_map *cpus, bool group, bool inherit); 85 int perf_evsel__open_per_thread(struct perf_evsel *evsel, 86 struct thread_map *threads, bool group, bool inherit); 87 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, 88 struct thread_map *threads, bool group, bool inherit); 89 90 #define perf_evsel__match(evsel, t, c) \ 91 (evsel->attr.type == PERF_TYPE_##t && \ 92 evsel->attr.config == PERF_COUNT_##c) 93 94 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, 95 int cpu, int thread, bool scale); 96 97 /** 98 * perf_evsel__read_on_cpu - Read out the results on a CPU and thread 99 * 100 * @evsel - event selector to read value 101 * @cpu - CPU of interest 102 * @thread - thread of interest 103 */ 104 static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel, 105 int cpu, int thread) 106 { 107 return __perf_evsel__read_on_cpu(evsel, cpu, thread, false); 108 } 109 110 /** 111 * perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled 112 * 113 * @evsel - event selector to read value 114 * @cpu - CPU of interest 115 * @thread - thread of interest 116 */ 117 static inline int perf_evsel__read_on_cpu_scaled(struct perf_evsel *evsel, 118 int cpu, int thread) 119 { 120 return __perf_evsel__read_on_cpu(evsel, cpu, thread, true); 121 } 122 123 int __perf_evsel__read(struct perf_evsel *evsel, int ncpus, int nthreads, 124 bool scale); 125 126 /** 127 * perf_evsel__read - Read the aggregate results on all CPUs 128 * 129 * @evsel - event selector to read value 130 * @ncpus - Number of cpus affected, from zero 131 * @nthreads - Number of threads affected, from zero 132 */ 133 static inline int perf_evsel__read(struct perf_evsel *evsel, 134 int ncpus, int nthreads) 135 { 136 return __perf_evsel__read(evsel, ncpus, nthreads, false); 137 } 138 139 /** 140 * perf_evsel__read_scaled - Read the aggregate results on all CPUs, scaled 141 * 142 * @evsel - event selector to read value 143 * @ncpus - Number of cpus affected, from zero 144 * @nthreads - Number of threads affected, from zero 145 */ 146 static inline int perf_evsel__read_scaled(struct perf_evsel *evsel, 147 int ncpus, int nthreads) 148 { 149 return __perf_evsel__read(evsel, ncpus, nthreads, true); 150 } 151 152 #endif /* __PERF_EVSEL_H */ 153