xref: /openbmc/linux/tools/perf/util/evlist.h (revision d7a3d85e)
1 #ifndef __PERF_EVLIST_H
2 #define __PERF_EVLIST_H 1
3 
4 #include <linux/atomic.h>
5 #include <linux/list.h>
6 #include <api/fd/array.h>
7 #include <stdio.h>
8 #include "../perf.h"
9 #include "event.h"
10 #include "evsel.h"
11 #include "util.h"
12 #include "auxtrace.h"
13 #include <unistd.h>
14 
15 struct pollfd;
16 struct thread_map;
17 struct cpu_map;
18 struct record_opts;
19 
20 #define PERF_EVLIST__HLIST_BITS 8
21 #define PERF_EVLIST__HLIST_SIZE (1 << PERF_EVLIST__HLIST_BITS)
22 
23 /**
24  * struct perf_mmap - perf's ring buffer mmap details
25  *
26  * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
27  */
28 struct perf_mmap {
29 	void		 *base;
30 	int		 mask;
31 	atomic_t	 refcnt;
32 	u64		 prev;
33 	struct auxtrace_mmap auxtrace_mmap;
34 	char		 event_copy[PERF_SAMPLE_MAX_SIZE] __attribute__((aligned(8)));
35 };
36 
37 struct perf_evlist {
38 	struct list_head entries;
39 	struct hlist_head heads[PERF_EVLIST__HLIST_SIZE];
40 	int		 nr_entries;
41 	int		 nr_groups;
42 	int		 nr_mmaps;
43 	bool		 overwrite;
44 	size_t		 mmap_len;
45 	int		 id_pos;
46 	int		 is_pos;
47 	u64		 combined_sample_type;
48 	struct {
49 		int	cork_fd;
50 		pid_t	pid;
51 	} workload;
52 	struct fdarray	 pollfd;
53 	struct perf_mmap *mmap;
54 	struct thread_map *threads;
55 	struct cpu_map	  *cpus;
56 	struct perf_evsel *selected;
57 	struct events_stats stats;
58 };
59 
60 struct perf_evsel_str_handler {
61 	const char *name;
62 	void	   *handler;
63 };
64 
65 struct perf_evlist *perf_evlist__new(void);
66 struct perf_evlist *perf_evlist__new_default(void);
67 void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus,
68 		       struct thread_map *threads);
69 void perf_evlist__exit(struct perf_evlist *evlist);
70 void perf_evlist__delete(struct perf_evlist *evlist);
71 
72 void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry);
73 int perf_evlist__add_default(struct perf_evlist *evlist);
74 int __perf_evlist__add_default_attrs(struct perf_evlist *evlist,
75 				     struct perf_event_attr *attrs, size_t nr_attrs);
76 
77 #define perf_evlist__add_default_attrs(evlist, array) \
78 	__perf_evlist__add_default_attrs(evlist, array, ARRAY_SIZE(array))
79 
80 int perf_evlist__add_newtp(struct perf_evlist *evlist,
81 			   const char *sys, const char *name, void *handler);
82 
83 int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter);
84 int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid);
85 int perf_evlist__set_filter_pids(struct perf_evlist *evlist, size_t npids, pid_t *pids);
86 
87 struct perf_evsel *
88 perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id);
89 
90 struct perf_evsel *
91 perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist,
92 				     const char *name);
93 
94 void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel,
95 			 int cpu, int thread, u64 id);
96 
97 int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd);
98 int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
99 int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask);
100 
101 int perf_evlist__poll(struct perf_evlist *evlist, int timeout);
102 
103 struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id);
104 
105 struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id);
106 
107 union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx);
108 
109 void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx);
110 
111 int perf_evlist__open(struct perf_evlist *evlist);
112 void perf_evlist__close(struct perf_evlist *evlist);
113 
114 void perf_evlist__set_id_pos(struct perf_evlist *evlist);
115 bool perf_can_sample_identifier(void);
116 void perf_evlist__config(struct perf_evlist *evlist, struct record_opts *opts);
117 int record_opts__config(struct record_opts *opts);
118 
119 int perf_evlist__prepare_workload(struct perf_evlist *evlist,
120 				  struct target *target,
121 				  const char *argv[], bool pipe_output,
122 				  void (*exec_error)(int signo, siginfo_t *info,
123 						     void *ucontext));
124 int perf_evlist__start_workload(struct perf_evlist *evlist);
125 
126 struct option;
127 
128 int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str);
129 int perf_evlist__parse_mmap_pages(const struct option *opt,
130 				  const char *str,
131 				  int unset);
132 
133 int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages,
134 			 bool overwrite, unsigned int auxtrace_pages,
135 			 bool auxtrace_overwrite);
136 int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
137 		      bool overwrite);
138 void perf_evlist__munmap(struct perf_evlist *evlist);
139 
140 void perf_evlist__disable(struct perf_evlist *evlist);
141 void perf_evlist__enable(struct perf_evlist *evlist);
142 
143 int perf_evlist__disable_event(struct perf_evlist *evlist,
144 			       struct perf_evsel *evsel);
145 int perf_evlist__enable_event(struct perf_evlist *evlist,
146 			      struct perf_evsel *evsel);
147 int perf_evlist__enable_event_idx(struct perf_evlist *evlist,
148 				  struct perf_evsel *evsel, int idx);
149 
150 void perf_evlist__set_selected(struct perf_evlist *evlist,
151 			       struct perf_evsel *evsel);
152 
153 static inline void perf_evlist__set_maps(struct perf_evlist *evlist,
154 					 struct cpu_map *cpus,
155 					 struct thread_map *threads)
156 {
157 	evlist->cpus	= cpus;
158 	evlist->threads	= threads;
159 }
160 
161 int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target);
162 int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **err_evsel);
163 
164 void __perf_evlist__set_leader(struct list_head *list);
165 void perf_evlist__set_leader(struct perf_evlist *evlist);
166 
167 u64 perf_evlist__read_format(struct perf_evlist *evlist);
168 u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist);
169 u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist);
170 bool perf_evlist__sample_id_all(struct perf_evlist *evlist);
171 u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist);
172 
173 int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event,
174 			      struct perf_sample *sample);
175 
176 bool perf_evlist__valid_sample_type(struct perf_evlist *evlist);
177 bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist);
178 bool perf_evlist__valid_read_format(struct perf_evlist *evlist);
179 
180 void perf_evlist__splice_list_tail(struct perf_evlist *evlist,
181 				   struct list_head *list,
182 				   int nr_entries);
183 
184 static inline struct perf_evsel *perf_evlist__first(struct perf_evlist *evlist)
185 {
186 	return list_entry(evlist->entries.next, struct perf_evsel, node);
187 }
188 
189 static inline struct perf_evsel *perf_evlist__last(struct perf_evlist *evlist)
190 {
191 	return list_entry(evlist->entries.prev, struct perf_evsel, node);
192 }
193 
194 size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp);
195 
196 int perf_evlist__strerror_open(struct perf_evlist *evlist, int err, char *buf, size_t size);
197 int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size);
198 
199 static inline u64 perf_mmap__read_head(struct perf_mmap *mm)
200 {
201 	struct perf_event_mmap_page *pc = mm->base;
202 	u64 head = ACCESS_ONCE(pc->data_head);
203 	rmb();
204 	return head;
205 }
206 
207 static inline void perf_mmap__write_tail(struct perf_mmap *md, u64 tail)
208 {
209 	struct perf_event_mmap_page *pc = md->base;
210 
211 	/*
212 	 * ensure all reads are done before we write the tail out.
213 	 */
214 	mb();
215 	pc->data_tail = tail;
216 }
217 
218 bool perf_evlist__can_select_event(struct perf_evlist *evlist, const char *str);
219 void perf_evlist__to_front(struct perf_evlist *evlist,
220 			   struct perf_evsel *move_evsel);
221 
222 /**
223  * __evlist__for_each - iterate thru all the evsels
224  * @list: list_head instance to iterate
225  * @evsel: struct evsel iterator
226  */
227 #define __evlist__for_each(list, evsel) \
228         list_for_each_entry(evsel, list, node)
229 
230 /**
231  * evlist__for_each - iterate thru all the evsels
232  * @evlist: evlist instance to iterate
233  * @evsel: struct evsel iterator
234  */
235 #define evlist__for_each(evlist, evsel) \
236 	__evlist__for_each(&(evlist)->entries, evsel)
237 
238 /**
239  * __evlist__for_each_continue - continue iteration thru all the evsels
240  * @list: list_head instance to iterate
241  * @evsel: struct evsel iterator
242  */
243 #define __evlist__for_each_continue(list, evsel) \
244         list_for_each_entry_continue(evsel, list, node)
245 
246 /**
247  * evlist__for_each_continue - continue iteration thru all the evsels
248  * @evlist: evlist instance to iterate
249  * @evsel: struct evsel iterator
250  */
251 #define evlist__for_each_continue(evlist, evsel) \
252 	__evlist__for_each_continue(&(evlist)->entries, evsel)
253 
254 /**
255  * __evlist__for_each_reverse - iterate thru all the evsels in reverse order
256  * @list: list_head instance to iterate
257  * @evsel: struct evsel iterator
258  */
259 #define __evlist__for_each_reverse(list, evsel) \
260         list_for_each_entry_reverse(evsel, list, node)
261 
262 /**
263  * evlist__for_each_reverse - iterate thru all the evsels in reverse order
264  * @evlist: evlist instance to iterate
265  * @evsel: struct evsel iterator
266  */
267 #define evlist__for_each_reverse(evlist, evsel) \
268 	__evlist__for_each_reverse(&(evlist)->entries, evsel)
269 
270 /**
271  * __evlist__for_each_safe - safely iterate thru all the evsels
272  * @list: list_head instance to iterate
273  * @tmp: struct evsel temp iterator
274  * @evsel: struct evsel iterator
275  */
276 #define __evlist__for_each_safe(list, tmp, evsel) \
277         list_for_each_entry_safe(evsel, tmp, list, node)
278 
279 /**
280  * evlist__for_each_safe - safely iterate thru all the evsels
281  * @evlist: evlist instance to iterate
282  * @evsel: struct evsel iterator
283  * @tmp: struct evsel temp iterator
284  */
285 #define evlist__for_each_safe(evlist, tmp, evsel) \
286 	__evlist__for_each_safe(&(evlist)->entries, tmp, evsel)
287 
288 void perf_evlist__set_tracking_event(struct perf_evlist *evlist,
289 				     struct perf_evsel *tracking_evsel);
290 
291 #endif /* __PERF_EVLIST_H */
292