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