1 // SPDX-License-Identifier: GPL-2.0
2 #define _GNU_SOURCE // needed for sched.h to get sched_[gs]etaffinity and CPU_(ZERO,SET)
3 #include <inttypes.h>
4 #include <sched.h>
5 #include <stdio.h>
6 #include <stdarg.h>
7 #include <unistd.h>
8 #include <stdlib.h>
9 #include <linux/perf_event.h>
10 #include <linux/limits.h>
11 #include <sys/types.h>
12 #include <sys/wait.h>
13 #include <sys/prctl.h>
14 #include <perf/cpumap.h>
15 #include <perf/threadmap.h>
16 #include <perf/evlist.h>
17 #include <perf/evsel.h>
18 #include <perf/mmap.h>
19 #include <perf/event.h>
20 #include <internal/tests.h>
21 #include <api/fs/fs.h>
22 #include "tests.h"
23 #include <internal/evsel.h>
24
25 #define EVENT_NUM 15
26 #define WAIT_COUNT 100000000UL
27
28 static int libperf_print(enum libperf_print_level level,
29 const char *fmt, va_list ap)
30 {
31 return vfprintf(stderr, fmt, ap);
32 }
33
34 static int test_stat_cpu(void)
35 {
36 struct perf_cpu_map *cpus;
37 struct perf_evlist *evlist;
38 struct perf_evsel *evsel, *leader;
39 struct perf_event_attr attr1 = {
40 .type = PERF_TYPE_SOFTWARE,
41 .config = PERF_COUNT_SW_CPU_CLOCK,
42 };
43 struct perf_event_attr attr2 = {
44 .type = PERF_TYPE_SOFTWARE,
45 .config = PERF_COUNT_SW_TASK_CLOCK,
46 };
47 int err, idx;
48
49 cpus = perf_cpu_map__new_online_cpus();
50 __T("failed to create cpus", cpus);
51
52 evlist = perf_evlist__new();
53 __T("failed to create evlist", evlist);
54
55 evsel = leader = perf_evsel__new(&attr1);
56 __T("failed to create evsel1", evsel);
57
58 perf_evlist__add(evlist, evsel);
59
60 evsel = perf_evsel__new(&attr2);
61 __T("failed to create evsel2", evsel);
62
63 perf_evlist__add(evlist, evsel);
64
65 perf_evlist__set_leader(evlist);
66 __T("failed to set leader", leader->leader == leader);
67 __T("failed to set leader", evsel->leader == leader);
68
69 perf_evlist__set_maps(evlist, cpus, NULL);
70
71 err = perf_evlist__open(evlist);
72 __T("failed to open evlist", err == 0);
73
74 perf_evlist__for_each_evsel(evlist, evsel) {
75 cpus = perf_evsel__cpus(evsel);
76
77 for (idx = 0; idx < perf_cpu_map__nr(cpus); idx++) {
78 struct perf_counts_values counts = { .val = 0 };
79
80 perf_evsel__read(evsel, idx, 0, &counts);
81 __T("failed to read value for evsel", counts.val != 0);
82 }
83 }
84
85 perf_evlist__close(evlist);
86 perf_evlist__delete(evlist);
87
88 perf_cpu_map__put(cpus);
89 return 0;
90 }
91
92 static int test_stat_thread(void)
93 {
94 struct perf_counts_values counts = { .val = 0 };
95 struct perf_thread_map *threads;
96 struct perf_evlist *evlist;
97 struct perf_evsel *evsel, *leader;
98 struct perf_event_attr attr1 = {
99 .type = PERF_TYPE_SOFTWARE,
100 .config = PERF_COUNT_SW_CPU_CLOCK,
101 };
102 struct perf_event_attr attr2 = {
103 .type = PERF_TYPE_SOFTWARE,
104 .config = PERF_COUNT_SW_TASK_CLOCK,
105 };
106 int err;
107
108 threads = perf_thread_map__new_dummy();
109 __T("failed to create threads", threads);
110
111 perf_thread_map__set_pid(threads, 0, 0);
112
113 evlist = perf_evlist__new();
114 __T("failed to create evlist", evlist);
115
116 evsel = leader = perf_evsel__new(&attr1);
117 __T("failed to create evsel1", evsel);
118
119 perf_evlist__add(evlist, evsel);
120
121 evsel = perf_evsel__new(&attr2);
122 __T("failed to create evsel2", evsel);
123
124 perf_evlist__add(evlist, evsel);
125
126 perf_evlist__set_leader(evlist);
127 __T("failed to set leader", leader->leader == leader);
128 __T("failed to set leader", evsel->leader == leader);
129
130 perf_evlist__set_maps(evlist, NULL, threads);
131
132 err = perf_evlist__open(evlist);
133 __T("failed to open evlist", err == 0);
134
135 perf_evlist__for_each_evsel(evlist, evsel) {
136 perf_evsel__read(evsel, 0, 0, &counts);
137 __T("failed to read value for evsel", counts.val != 0);
138 }
139
140 perf_evlist__close(evlist);
141 perf_evlist__delete(evlist);
142
143 perf_thread_map__put(threads);
144 return 0;
145 }
146
147 static int test_stat_thread_enable(void)
148 {
149 struct perf_counts_values counts = { .val = 0 };
150 struct perf_thread_map *threads;
151 struct perf_evlist *evlist;
152 struct perf_evsel *evsel, *leader;
153 struct perf_event_attr attr1 = {
154 .type = PERF_TYPE_SOFTWARE,
155 .config = PERF_COUNT_SW_CPU_CLOCK,
156 .disabled = 1,
157 };
158 struct perf_event_attr attr2 = {
159 .type = PERF_TYPE_SOFTWARE,
160 .config = PERF_COUNT_SW_TASK_CLOCK,
161 .disabled = 1,
162 };
163 int err;
164
165 threads = perf_thread_map__new_dummy();
166 __T("failed to create threads", threads);
167
168 perf_thread_map__set_pid(threads, 0, 0);
169
170 evlist = perf_evlist__new();
171 __T("failed to create evlist", evlist);
172
173 evsel = leader = perf_evsel__new(&attr1);
174 __T("failed to create evsel1", evsel);
175
176 perf_evlist__add(evlist, evsel);
177
178 evsel = perf_evsel__new(&attr2);
179 __T("failed to create evsel2", evsel);
180
181 perf_evlist__add(evlist, evsel);
182
183 perf_evlist__set_leader(evlist);
184 __T("failed to set leader", leader->leader == leader);
185 __T("failed to set leader", evsel->leader == leader);
186
187 perf_evlist__set_maps(evlist, NULL, threads);
188
189 err = perf_evlist__open(evlist);
190 __T("failed to open evlist", err == 0);
191
192 perf_evlist__for_each_evsel(evlist, evsel) {
193 perf_evsel__read(evsel, 0, 0, &counts);
194 __T("failed to read value for evsel", counts.val == 0);
195 }
196
197 perf_evlist__enable(evlist);
198
199 perf_evlist__for_each_evsel(evlist, evsel) {
200 perf_evsel__read(evsel, 0, 0, &counts);
201 __T("failed to read value for evsel", counts.val != 0);
202 }
203
204 perf_evlist__disable(evlist);
205
206 perf_evlist__close(evlist);
207 perf_evlist__delete(evlist);
208
209 perf_thread_map__put(threads);
210 return 0;
211 }
212
213 static int test_mmap_thread(void)
214 {
215 struct perf_evlist *evlist;
216 struct perf_evsel *evsel;
217 struct perf_mmap *map;
218 struct perf_cpu_map *cpus;
219 struct perf_thread_map *threads;
220 struct perf_event_attr attr = {
221 .type = PERF_TYPE_TRACEPOINT,
222 .sample_period = 1,
223 .wakeup_watermark = 1,
224 .disabled = 1,
225 };
226 char path[PATH_MAX];
227 int id, err, pid, go_pipe[2];
228 union perf_event *event;
229 int count = 0;
230
231 snprintf(path, PATH_MAX, "%s/kernel/debug/tracing/events/syscalls/sys_enter_prctl/id",
232 sysfs__mountpoint());
233
234 if (filename__read_int(path, &id)) {
235 tests_failed++;
236 fprintf(stderr, "error: failed to get tracepoint id: %s\n", path);
237 return -1;
238 }
239
240 attr.config = id;
241
242 err = pipe(go_pipe);
243 __T("failed to create pipe", err == 0);
244
245 fflush(NULL);
246
247 pid = fork();
248 if (!pid) {
249 int i;
250 char bf;
251
252 read(go_pipe[0], &bf, 1);
253
254 /* Generate 100 prctl calls. */
255 for (i = 0; i < 100; i++)
256 prctl(0, 0, 0, 0, 0);
257
258 exit(0);
259 }
260
261 threads = perf_thread_map__new_dummy();
262 __T("failed to create threads", threads);
263
264 cpus = perf_cpu_map__new_any_cpu();
265 __T("failed to create cpus", cpus);
266
267 perf_thread_map__set_pid(threads, 0, pid);
268
269 evlist = perf_evlist__new();
270 __T("failed to create evlist", evlist);
271
272 evsel = perf_evsel__new(&attr);
273 __T("failed to create evsel1", evsel);
274 __T("failed to set leader", evsel->leader == evsel);
275
276 perf_evlist__add(evlist, evsel);
277
278 perf_evlist__set_maps(evlist, cpus, threads);
279
280 err = perf_evlist__open(evlist);
281 __T("failed to open evlist", err == 0);
282
283 err = perf_evlist__mmap(evlist, 4);
284 __T("failed to mmap evlist", err == 0);
285
286 perf_evlist__enable(evlist);
287
288 /* kick the child and wait for it to finish */
289 write(go_pipe[1], "A", 1);
290 waitpid(pid, NULL, 0);
291
292 /*
293 * There's no need to call perf_evlist__disable,
294 * monitored process is dead now.
295 */
296
297 perf_evlist__for_each_mmap(evlist, map, false) {
298 if (perf_mmap__read_init(map) < 0)
299 continue;
300
301 while ((event = perf_mmap__read_event(map)) != NULL) {
302 count++;
303 perf_mmap__consume(map);
304 }
305
306 perf_mmap__read_done(map);
307 }
308
309 /* calls perf_evlist__munmap/perf_evlist__close */
310 perf_evlist__delete(evlist);
311
312 perf_thread_map__put(threads);
313 perf_cpu_map__put(cpus);
314
315 /*
316 * The generated prctl calls should match the
317 * number of events in the buffer.
318 */
319 __T("failed count", count == 100);
320
321 return 0;
322 }
323
324 static int test_mmap_cpus(void)
325 {
326 struct perf_evlist *evlist;
327 struct perf_evsel *evsel;
328 struct perf_mmap *map;
329 struct perf_cpu_map *cpus;
330 struct perf_event_attr attr = {
331 .type = PERF_TYPE_TRACEPOINT,
332 .sample_period = 1,
333 .wakeup_watermark = 1,
334 .disabled = 1,
335 };
336 cpu_set_t saved_mask;
337 char path[PATH_MAX];
338 int id, err, tmp;
339 struct perf_cpu cpu;
340 union perf_event *event;
341 int count = 0;
342
343 snprintf(path, PATH_MAX, "%s/kernel/debug/tracing/events/syscalls/sys_enter_prctl/id",
344 sysfs__mountpoint());
345
346 if (filename__read_int(path, &id)) {
347 fprintf(stderr, "error: failed to get tracepoint id: %s\n", path);
348 return -1;
349 }
350
351 attr.config = id;
352
353 cpus = perf_cpu_map__new_online_cpus();
354 __T("failed to create cpus", cpus);
355
356 evlist = perf_evlist__new();
357 __T("failed to create evlist", evlist);
358
359 evsel = perf_evsel__new(&attr);
360 __T("failed to create evsel1", evsel);
361 __T("failed to set leader", evsel->leader == evsel);
362
363 perf_evlist__add(evlist, evsel);
364
365 perf_evlist__set_maps(evlist, cpus, NULL);
366
367 err = perf_evlist__open(evlist);
368 __T("failed to open evlist", err == 0);
369
370 err = perf_evlist__mmap(evlist, 4);
371 __T("failed to mmap evlist", err == 0);
372
373 perf_evlist__enable(evlist);
374
375 err = sched_getaffinity(0, sizeof(saved_mask), &saved_mask);
376 __T("sched_getaffinity failed", err == 0);
377
378 perf_cpu_map__for_each_cpu(cpu, tmp, cpus) {
379 cpu_set_t mask;
380
381 CPU_ZERO(&mask);
382 CPU_SET(cpu.cpu, &mask);
383
384 err = sched_setaffinity(0, sizeof(mask), &mask);
385 __T("sched_setaffinity failed", err == 0);
386
387 prctl(0, 0, 0, 0, 0);
388 }
389
390 err = sched_setaffinity(0, sizeof(saved_mask), &saved_mask);
391 __T("sched_setaffinity failed", err == 0);
392
393 perf_evlist__disable(evlist);
394
395 perf_evlist__for_each_mmap(evlist, map, false) {
396 if (perf_mmap__read_init(map) < 0)
397 continue;
398
399 while ((event = perf_mmap__read_event(map)) != NULL) {
400 count++;
401 perf_mmap__consume(map);
402 }
403
404 perf_mmap__read_done(map);
405 }
406
407 /* calls perf_evlist__munmap/perf_evlist__close */
408 perf_evlist__delete(evlist);
409
410 /*
411 * The generated prctl events should match the
412 * number of cpus or be bigger (we are system-wide).
413 */
414 __T("failed count", count >= perf_cpu_map__nr(cpus));
415
416 perf_cpu_map__put(cpus);
417
418 return 0;
419 }
420
421 static double display_error(long long average,
422 long long high,
423 long long low,
424 long long expected)
425 {
426 double error;
427
428 error = (((double)average - expected) / expected) * 100.0;
429
430 __T_VERBOSE(" Expected: %lld\n", expected);
431 __T_VERBOSE(" High: %lld Low: %lld Average: %lld\n",
432 high, low, average);
433
434 __T_VERBOSE(" Average Error = %.2f%%\n", error);
435
436 return error;
437 }
438
439 static int test_stat_multiplexing(void)
440 {
441 struct perf_counts_values expected_counts = { .val = 0 };
442 struct perf_counts_values counts[EVENT_NUM] = {{ .val = 0 },};
443 struct perf_thread_map *threads;
444 struct perf_evlist *evlist;
445 struct perf_evsel *evsel;
446 struct perf_event_attr attr = {
447 .type = PERF_TYPE_HARDWARE,
448 .config = PERF_COUNT_HW_INSTRUCTIONS,
449 .read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
450 PERF_FORMAT_TOTAL_TIME_RUNNING,
451 .disabled = 1,
452 };
453 int err, i, nonzero = 0;
454 unsigned long count;
455 long long max = 0, min = 0, avg = 0;
456 double error = 0.0;
457 s8 scaled = 0;
458
459 /* read for non-multiplexing event count */
460 threads = perf_thread_map__new_dummy();
461 __T("failed to create threads", threads);
462
463 perf_thread_map__set_pid(threads, 0, 0);
464
465 evsel = perf_evsel__new(&attr);
466 __T("failed to create evsel", evsel);
467
468 err = perf_evsel__open(evsel, NULL, threads);
469 __T("failed to open evsel", err == 0);
470
471 err = perf_evsel__enable(evsel);
472 __T("failed to enable evsel", err == 0);
473
474 /* wait loop */
475 count = WAIT_COUNT;
476 while (count--)
477 ;
478
479 perf_evsel__read(evsel, 0, 0, &expected_counts);
480 __T("failed to read value for evsel", expected_counts.val != 0);
481 __T("failed to read non-multiplexing event count",
482 expected_counts.ena == expected_counts.run);
483
484 err = perf_evsel__disable(evsel);
485 __T("failed to enable evsel", err == 0);
486
487 perf_evsel__close(evsel);
488 perf_evsel__delete(evsel);
489
490 perf_thread_map__put(threads);
491
492 /* read for multiplexing event count */
493 threads = perf_thread_map__new_dummy();
494 __T("failed to create threads", threads);
495
496 perf_thread_map__set_pid(threads, 0, 0);
497
498 evlist = perf_evlist__new();
499 __T("failed to create evlist", evlist);
500
501 for (i = 0; i < EVENT_NUM; i++) {
502 evsel = perf_evsel__new(&attr);
503 __T("failed to create evsel", evsel);
504
505 perf_evlist__add(evlist, evsel);
506 }
507 perf_evlist__set_maps(evlist, NULL, threads);
508
509 err = perf_evlist__open(evlist);
510 __T("failed to open evlist", err == 0);
511
512 perf_evlist__enable(evlist);
513
514 /* wait loop */
515 count = WAIT_COUNT;
516 while (count--)
517 ;
518
519 i = 0;
520 perf_evlist__for_each_evsel(evlist, evsel) {
521 perf_evsel__read(evsel, 0, 0, &counts[i]);
522 __T("failed to read value for evsel", counts[i].val != 0);
523 i++;
524 }
525
526 perf_evlist__disable(evlist);
527
528 min = counts[0].val;
529 for (i = 0; i < EVENT_NUM; i++) {
530 __T_VERBOSE("Event %2d -- Raw count = %" PRIu64 ", run = %" PRIu64 ", enable = %" PRIu64 "\n",
531 i, counts[i].val, counts[i].run, counts[i].ena);
532
533 perf_counts_values__scale(&counts[i], true, &scaled);
534 if (scaled == 1) {
535 __T_VERBOSE("\t Scaled count = %" PRIu64 " (%.2lf%%, %" PRIu64 "/%" PRIu64 ")\n",
536 counts[i].val,
537 (double)counts[i].run / (double)counts[i].ena * 100.0,
538 counts[i].run, counts[i].ena);
539 } else if (scaled == -1) {
540 __T_VERBOSE("\t Not Running\n");
541 } else {
542 __T_VERBOSE("\t Not Scaling\n");
543 }
544
545 if (counts[i].val > max)
546 max = counts[i].val;
547
548 if (counts[i].val < min)
549 min = counts[i].val;
550
551 avg += counts[i].val;
552
553 if (counts[i].val != 0)
554 nonzero++;
555 }
556
557 if (nonzero != 0)
558 avg = avg / nonzero;
559 else
560 avg = 0;
561
562 error = display_error(avg, max, min, expected_counts.val);
563
564 __T("Error out of range!", ((error <= 1.0) && (error >= -1.0)));
565
566 perf_evlist__close(evlist);
567 perf_evlist__delete(evlist);
568
569 perf_thread_map__put(threads);
570
571 return 0;
572 }
573
574 int test_evlist(int argc, char **argv)
575 {
576 __T_START;
577
578 libperf_init(libperf_print);
579
580 test_stat_cpu();
581 test_stat_thread();
582 test_stat_thread_enable();
583 test_mmap_thread();
584 test_mmap_cpus();
585 test_stat_multiplexing();
586
587 __T_END;
588 return tests_failed == 0 ? 0 : -1;
589 }
590
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