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 struct {
65 void *func;
66 void *data;
67 } handler;
68 bool supported;
69 };
70
71 struct cpu_map;
72 struct thread_map;
73 struct perf_evlist;
74 struct perf_record_opts;
75
76 struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
77 void perf_evsel__init(struct perf_evsel *evsel,
78 struct perf_event_attr *attr, int idx);
79 void perf_evsel__exit(struct perf_evsel *evsel);
80 void perf_evsel__delete(struct perf_evsel *evsel);
81
82 void perf_evsel__config(struct perf_evsel *evsel,
83 struct perf_record_opts *opts,
84 struct perf_evsel *first);
85
86 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
87 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
88 int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
89 void perf_evsel__free_fd(struct perf_evsel *evsel);
90 void perf_evsel__free_id(struct perf_evsel *evsel);
91 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
92
93 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
94 struct cpu_map *cpus, bool group,
95 struct xyarray *group_fds);
96 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
97 struct thread_map *threads, bool group,
98 struct xyarray *group_fds);
99 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
100 struct thread_map *threads, bool group,
101 struct xyarray *group_fds);
102 void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads);
103
104 #define perf_evsel__match(evsel, t, c) \
105 (evsel->attr.type == PERF_TYPE_##t && \
106 evsel->attr.config == PERF_COUNT_##c)
107
108 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
109 int cpu, int thread, bool scale);
110
111 /**
112 * perf_evsel__read_on_cpu - Read out the results on a CPU and thread
113 *
114 * @evsel - event selector to read value
115 * @cpu - CPU of interest
116 * @thread - thread of interest
117 */
perf_evsel__read_on_cpu(struct perf_evsel * evsel,int cpu,int thread)118 static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel,
119 int cpu, int thread)
120 {
121 return __perf_evsel__read_on_cpu(evsel, cpu, thread, false);
122 }
123
124 /**
125 * perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
126 *
127 * @evsel - event selector to read value
128 * @cpu - CPU of interest
129 * @thread - thread of interest
130 */
perf_evsel__read_on_cpu_scaled(struct perf_evsel * evsel,int cpu,int thread)131 static inline int perf_evsel__read_on_cpu_scaled(struct perf_evsel *evsel,
132 int cpu, int thread)
133 {
134 return __perf_evsel__read_on_cpu(evsel, cpu, thread, true);
135 }
136
137 int __perf_evsel__read(struct perf_evsel *evsel, int ncpus, int nthreads,
138 bool scale);
139
140 /**
141 * perf_evsel__read - Read the aggregate results on all CPUs
142 *
143 * @evsel - event selector to read value
144 * @ncpus - Number of cpus affected, from zero
145 * @nthreads - Number of threads affected, from zero
146 */
perf_evsel__read(struct perf_evsel * evsel,int ncpus,int nthreads)147 static inline int perf_evsel__read(struct perf_evsel *evsel,
148 int ncpus, int nthreads)
149 {
150 return __perf_evsel__read(evsel, ncpus, nthreads, false);
151 }
152
153 /**
154 * perf_evsel__read_scaled - Read the aggregate results on all CPUs, scaled
155 *
156 * @evsel - event selector to read value
157 * @ncpus - Number of cpus affected, from zero
158 * @nthreads - Number of threads affected, from zero
159 */
perf_evsel__read_scaled(struct perf_evsel * evsel,int ncpus,int nthreads)160 static inline int perf_evsel__read_scaled(struct perf_evsel *evsel,
161 int ncpus, int nthreads)
162 {
163 return __perf_evsel__read(evsel, ncpus, nthreads, true);
164 }
165
166 int __perf_evsel__sample_size(u64 sample_type);
167
perf_evsel__sample_size(struct perf_evsel * evsel)168 static inline int perf_evsel__sample_size(struct perf_evsel *evsel)
169 {
170 return __perf_evsel__sample_size(evsel->attr.sample_type);
171 }
172
173 void hists__init(struct hists *hists);
174
175 #endif /* __PERF_EVSEL_H */
176