projects/linux·blob master · refs

367 lines · 9.3 KiB

1// SPDX-License-Identifier: GPL-2.0
2#include <stdarg.h>
3#include <stdio.h>
4#include <string.h>
5#include <linux/perf_event.h>
6#include <linux/kernel.h>
7#include <perf/cpumap.h>
8#include <perf/threadmap.h>
9#include <perf/evsel.h>
10#include <internal/evsel.h>
11#include <internal/tests.h>
12#include "tests.h"
13
14static int libperf_print(enum libperf_print_level level,
15 const char *fmt, va_list ap)
16{
17 return vfprintf(stderr, fmt, ap);
18}
19
20static int test_stat_cpu(void)
21{
22 struct perf_cpu_map *cpus;
23 struct perf_evsel *evsel;
24 struct perf_event_attr attr = {
25 .type = PERF_TYPE_SOFTWARE,
26 .config = PERF_COUNT_SW_CPU_CLOCK,
27 };
28 int err, idx;
29
30 cpus = perf_cpu_map__new_online_cpus();
31 __T("failed to create cpus", cpus);
32
33 evsel = perf_evsel__new(&attr);
34 __T("failed to create evsel", evsel);
35
36 err = perf_evsel__open(evsel, cpus, NULL);
37 __T("failed to open evsel", err == 0);
38
39 for (idx = 0; idx < perf_cpu_map__nr(cpus); idx++) {
40 struct perf_counts_values counts = { .val = 0 };
41
42 perf_evsel__read(evsel, idx, 0, &counts);
43 __T("failed to read value for evsel", counts.val != 0);
44 }
45
46 perf_evsel__close(evsel);
47 perf_evsel__delete(evsel);
48
49 perf_cpu_map__put(cpus);
50 return 0;
51}
52
53static int test_stat_thread(void)
54{
55 struct perf_counts_values counts = { .val = 0 };
56 struct perf_thread_map *threads;
57 struct perf_evsel *evsel;
58 struct perf_event_attr attr = {
59 .type = PERF_TYPE_SOFTWARE,
60 .config = PERF_COUNT_SW_TASK_CLOCK,
61 };
62 int err;
63
64 threads = perf_thread_map__new_dummy();
65 __T("failed to create threads", threads);
66
67 perf_thread_map__set_pid(threads, 0, 0);
68
69 evsel = perf_evsel__new(&attr);
70 __T("failed to create evsel", evsel);
71
72 err = perf_evsel__open(evsel, NULL, threads);
73 __T("failed to open evsel", err == 0);
74
75 perf_evsel__read(evsel, 0, 0, &counts);
76 __T("failed to read value for evsel", counts.val != 0);
77
78 perf_evsel__close(evsel);
79 perf_evsel__delete(evsel);
80
81 perf_thread_map__put(threads);
82 return 0;
83}
84
85static int test_stat_thread_enable(void)
86{
87 struct perf_counts_values counts = { .val = 0 };
88 struct perf_thread_map *threads;
89 struct perf_evsel *evsel;
90 struct perf_event_attr attr = {
91 .type = PERF_TYPE_SOFTWARE,
92 .config = PERF_COUNT_SW_TASK_CLOCK,
93 .disabled = 1,
94 };
95 int err;
96
97 threads = perf_thread_map__new_dummy();
98 __T("failed to create threads", threads);
99
100 perf_thread_map__set_pid(threads, 0, 0);
101
102 evsel = perf_evsel__new(&attr);
103 __T("failed to create evsel", evsel);
104
105 err = perf_evsel__open(evsel, NULL, threads);
106 __T("failed to open evsel", err == 0);
107
108 perf_evsel__read(evsel, 0, 0, &counts);
109 __T("failed to read value for evsel", counts.val == 0);
110
111 err = perf_evsel__enable(evsel);
112 __T("failed to enable evsel", err == 0);
113
114 perf_evsel__read(evsel, 0, 0, &counts);
115 __T("failed to read value for evsel", counts.val != 0);
116
117 err = perf_evsel__disable(evsel);
118 __T("failed to enable evsel", err == 0);
119
120 perf_evsel__close(evsel);
121 perf_evsel__delete(evsel);
122
123 perf_thread_map__put(threads);
124 return 0;
125}
126
127static int test_stat_user_read(int event)
128{
129 struct perf_counts_values counts = { .val = 0 };
130 struct perf_thread_map *threads;
131 struct perf_evsel *evsel;
132 struct perf_event_mmap_page *pc;
133 struct perf_event_attr attr = {
134 .type = PERF_TYPE_HARDWARE,
135 .config = event,
136#ifdef __aarch64__
137 .config1 = 0x2, /* Request user access */
138#endif
139 };
140 int err, i;
141
142 threads = perf_thread_map__new_dummy();
143 __T("failed to create threads", threads);
144
145 perf_thread_map__set_pid(threads, 0, 0);
146
147 evsel = perf_evsel__new(&attr);
148 __T("failed to create evsel", evsel);
149
150 err = perf_evsel__open(evsel, NULL, threads);
151 __T("failed to open evsel", err == 0);
152
153 err = perf_evsel__mmap(evsel, 0);
154 __T("failed to mmap evsel", err == 0);
155
156 pc = perf_evsel__mmap_base(evsel, 0, 0);
157 __T("failed to get mmapped address", pc);
158
159#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__)
160 __T("userspace counter access not supported", pc->cap_user_rdpmc);
161 __T("userspace counter access not enabled", pc->index);
162 __T("userspace counter width not set", pc->pmc_width >= 32);
163#endif
164
165 perf_evsel__read(evsel, 0, 0, &counts);
166 __T("failed to read value for evsel", counts.val != 0);
167
168 for (i = 0; i < 5; i++) {
169 volatile int count = 0x10000 << i;
170 __u64 start, end, last = 0;
171
172 __T_VERBOSE("\tloop = %u, ", count);
173
174 perf_evsel__read(evsel, 0, 0, &counts);
175 start = counts.val;
176
177 while (count--) ;
178
179 perf_evsel__read(evsel, 0, 0, &counts);
180 end = counts.val;
181
182 __T("invalid counter data", (end - start) > last);
183 last = end - start;
184 __T_VERBOSE("count = %llu\n", end - start);
185 }
186
187 perf_evsel__munmap(evsel);
188 perf_evsel__close(evsel);
189 perf_evsel__delete(evsel);
190
191 perf_thread_map__put(threads);
192 return 0;
193}
194
195static int test_stat_read_format_single(struct perf_event_attr *attr, struct perf_thread_map *threads)
196{
197 struct perf_evsel *evsel;
198 struct perf_counts_values counts;
199 volatile int count = 0x100000;
200 int err;
201
202 evsel = perf_evsel__new(attr);
203 __T("failed to create evsel", evsel);
204
205 /* skip old kernels that don't support the format */
206 err = perf_evsel__open(evsel, NULL, threads);
207 if (err < 0)
208 return 0;
209
210 while (count--) ;
211
212 memset(&counts, -1, sizeof(counts));
213 perf_evsel__read(evsel, 0, 0, &counts);
214
215 __T("failed to read value", counts.val);
216 if (attr->read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
217 __T("failed to read TOTAL_TIME_ENABLED", counts.ena);
218 if (attr->read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
219 __T("failed to read TOTAL_TIME_RUNNING", counts.run);
220 if (attr->read_format & PERF_FORMAT_ID)
221 __T("failed to read ID", counts.id);
222 if (attr->read_format & PERF_FORMAT_LOST)
223 __T("failed to read LOST", counts.lost == 0);
224
225 perf_evsel__close(evsel);
226 perf_evsel__delete(evsel);
227 return 0;
228}
229
230static int test_stat_read_format_group(struct perf_event_attr *attr, struct perf_thread_map *threads)
231{
232 struct perf_evsel *leader, *member;
233 struct perf_counts_values counts;
234 volatile int count = 0x100000;
235 int err;
236
237 attr->read_format |= PERF_FORMAT_GROUP;
238 leader = perf_evsel__new(attr);
239 __T("failed to create leader", leader);
240
241 attr->read_format &= ~PERF_FORMAT_GROUP;
242 member = perf_evsel__new(attr);
243 __T("failed to create member", member);
244
245 member->leader = leader;
246 leader->nr_members = 2;
247
248 /* skip old kernels that don't support the format */
249 err = perf_evsel__open(leader, NULL, threads);
250 if (err < 0)
251 return 0;
252 err = perf_evsel__open(member, NULL, threads);
253 if (err < 0)
254 return 0;
255
256 while (count--) ;
257
258 memset(&counts, -1, sizeof(counts));
259 perf_evsel__read(leader, 0, 0, &counts);
260
261 __T("failed to read leader value", counts.val);
262 if (attr->read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
263 __T("failed to read leader TOTAL_TIME_ENABLED", counts.ena);
264 if (attr->read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
265 __T("failed to read leader TOTAL_TIME_RUNNING", counts.run);
266 if (attr->read_format & PERF_FORMAT_ID)
267 __T("failed to read leader ID", counts.id);
268 if (attr->read_format & PERF_FORMAT_LOST)
269 __T("failed to read leader LOST", counts.lost == 0);
270
271 memset(&counts, -1, sizeof(counts));
272 perf_evsel__read(member, 0, 0, &counts);
273
274 __T("failed to read member value", counts.val);
275 if (attr->read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
276 __T("failed to read member TOTAL_TIME_ENABLED", counts.ena);
277 if (attr->read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
278 __T("failed to read member TOTAL_TIME_RUNNING", counts.run);
279 if (attr->read_format & PERF_FORMAT_ID)
280 __T("failed to read member ID", counts.id);
281 if (attr->read_format & PERF_FORMAT_LOST)
282 __T("failed to read member LOST", counts.lost == 0);
283
284 perf_evsel__close(member);
285 perf_evsel__close(leader);
286 perf_evsel__delete(member);
287 perf_evsel__delete(leader);
288 return 0;
289}
290
291static int test_stat_read_format(void)
292{
293 struct perf_thread_map *threads;
294 struct perf_event_attr attr = {
295 .type = PERF_TYPE_SOFTWARE,
296 .config = PERF_COUNT_SW_TASK_CLOCK,
297 };
298 int err, i;
299
300#define FMT(_fmt) PERF_FORMAT_ ## _fmt
301#define FMT_TIME (FMT(TOTAL_TIME_ENABLED) | FMT(TOTAL_TIME_RUNNING))
302
303 uint64_t test_formats [] = {
304 0,
305 FMT_TIME,
306 FMT(ID),
307 FMT(LOST),
308 FMT_TIME | FMT(ID),
309 FMT_TIME | FMT(LOST),
310 FMT_TIME | FMT(ID) | FMT(LOST),
311 FMT(ID) | FMT(LOST),
312 };
313
314#undef FMT
315#undef FMT_TIME
316
317 threads = perf_thread_map__new_dummy();
318 __T("failed to create threads", threads);
319
320 perf_thread_map__set_pid(threads, 0, 0);
321
322 for (i = 0; i < (int)ARRAY_SIZE(test_formats); i++) {
323 attr.read_format = test_formats[i];
324 __T_VERBOSE("testing single read with read_format: %lx\n",
325 (unsigned long)test_formats[i]);
326
327 err = test_stat_read_format_single(&attr, threads);
328 __T("failed to read single format", err == 0);
329 }
330
331 perf_thread_map__put(threads);
332
333 threads = perf_thread_map__new_array(2, NULL);
334 __T("failed to create threads", threads);
335
336 perf_thread_map__set_pid(threads, 0, 0);
337 perf_thread_map__set_pid(threads, 1, 0);
338
339 for (i = 0; i < (int)ARRAY_SIZE(test_formats); i++) {
340 attr.read_format = test_formats[i];
341 __T_VERBOSE("testing group read with read_format: %lx\n",
342 (unsigned long)test_formats[i]);
343
344 err = test_stat_read_format_group(&attr, threads);
345 __T("failed to read group format", err == 0);
346 }
347
348 perf_thread_map__put(threads);
349 return 0;
350}
351
352int test_evsel(int argc, char **argv)
353{
354 __T_START;
355
356 libperf_init(libperf_print);
357
358 test_stat_cpu();
359 test_stat_thread();
360 test_stat_thread_enable();
361 test_stat_user_read(PERF_COUNT_HW_INSTRUCTIONS);
362 test_stat_user_read(PERF_COUNT_HW_CPU_CYCLES);
363 test_stat_read_format();
364
365 __T_END;
366 return tests_failed == 0 ? 0 : -1;
367}