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);
85 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
86 struct thread_map *threads, bool group);
87 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
88 struct thread_map *threads, bool group);
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 */
perf_evsel__read_on_cpu(struct perf_evsel * evsel,int cpu,int thread)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 */
perf_evsel__read_on_cpu_scaled(struct perf_evsel * evsel,int cpu,int thread)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 */
perf_evsel__read(struct perf_evsel * evsel,int ncpus,int nthreads)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 */
perf_evsel__read_scaled(struct perf_evsel * evsel,int ncpus,int nthreads)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