tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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
12struct perf_counts_values {
13 union {
14 struct {
15 u64 val;
16 u64 ena;
17 u64 run;
18 };
19 u64 values[3];
20 };
21};
22
23struct perf_counts {
24 s8 scaled;
25 struct perf_counts_values aggr;
26 struct perf_counts_values cpu[];
27};
28
29struct 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 */
35struct 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 */
47struct 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
71struct cpu_map;
72struct thread_map;
73struct perf_evlist;
74struct perf_record_opts;
75
76struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
77void perf_evsel__init(struct perf_evsel *evsel,
78 struct perf_event_attr *attr, int idx);
79void perf_evsel__exit(struct perf_evsel *evsel);
80void perf_evsel__delete(struct perf_evsel *evsel);
81
82void perf_evsel__config(struct perf_evsel *evsel,
83 struct perf_record_opts *opts);
84
85int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
86int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads);
87int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus);
88void perf_evsel__free_fd(struct perf_evsel *evsel);
89void perf_evsel__free_id(struct perf_evsel *evsel);
90void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
91
92int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
93 struct cpu_map *cpus, bool group,
94 struct xyarray *group_fds);
95int perf_evsel__open_per_thread(struct perf_evsel *evsel,
96 struct thread_map *threads, bool group,
97 struct xyarray *group_fds);
98int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
99 struct thread_map *threads, bool group,
100 struct xyarray *group_fds);
101void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads);
102
103#define perf_evsel__match(evsel, t, c) \
104 (evsel->attr.type == PERF_TYPE_##t && \
105 evsel->attr.config == PERF_COUNT_##c)
106
107int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
108 int cpu, int thread, bool scale);
109
110/**
111 * perf_evsel__read_on_cpu - Read out the results on a CPU and thread
112 *
113 * @evsel - event selector to read value
114 * @cpu - CPU of interest
115 * @thread - thread of interest
116 */
117static inline int perf_evsel__read_on_cpu(struct perf_evsel *evsel,
118 int cpu, int thread)
119{
120 return __perf_evsel__read_on_cpu(evsel, cpu, thread, false);
121}
122
123/**
124 * perf_evsel__read_on_cpu_scaled - Read out the results on a CPU and thread, scaled
125 *
126 * @evsel - event selector to read value
127 * @cpu - CPU of interest
128 * @thread - thread of interest
129 */
130static inline int perf_evsel__read_on_cpu_scaled(struct perf_evsel *evsel,
131 int cpu, int thread)
132{
133 return __perf_evsel__read_on_cpu(evsel, cpu, thread, true);
134}
135
136int __perf_evsel__read(struct perf_evsel *evsel, int ncpus, int nthreads,
137 bool scale);
138
139/**
140 * perf_evsel__read - Read the aggregate results on all CPUs
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 */
146static inline int perf_evsel__read(struct perf_evsel *evsel,
147 int ncpus, int nthreads)
148{
149 return __perf_evsel__read(evsel, ncpus, nthreads, false);
150}
151
152/**
153 * perf_evsel__read_scaled - Read the aggregate results on all CPUs, scaled
154 *
155 * @evsel - event selector to read value
156 * @ncpus - Number of cpus affected, from zero
157 * @nthreads - Number of threads affected, from zero
158 */
159static inline int perf_evsel__read_scaled(struct perf_evsel *evsel,
160 int ncpus, int nthreads)
161{
162 return __perf_evsel__read(evsel, ncpus, nthreads, true);
163}
164
165int __perf_evsel__sample_size(u64 sample_type);
166
167static inline int perf_evsel__sample_size(struct perf_evsel *evsel)
168{
169 return __perf_evsel__sample_size(evsel->attr.sample_type);
170}
171
172#endif /* __PERF_EVSEL_H */