summaryrefslogtreecommitdiff
path: root/tools/perf/tests/builtin-test.c
blob: d13ee7683d9d835495eeaf3413c3cea1dd56c313 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
// SPDX-License-Identifier: GPL-2.0
/*
 * builtin-test.c
 *
 * Builtin regression testing command: ever growing number of sanity tests
 */
#include <fcntl.h>
#include <errno.h>
#include <poll.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include "builtin.h"
#include "config.h"
#include "hist.h"
#include "intlist.h"
#include "tests.h"
#include "debug.h"
#include "color.h"
#include <subcmd/parse-options.h>
#include <subcmd/run-command.h>
#include "string2.h"
#include "symbol.h"
#include "util/rlimit.h"
#include "util/strbuf.h"
#include <linux/kernel.h>
#include <linux/string.h>
#include <subcmd/exec-cmd.h>
#include <linux/zalloc.h>

#include "tests-scripts.h"

/*
 * Command line option to not fork the test running in the same process and
 * making them easier to debug.
 */
static bool dont_fork;
/* Fork the tests in parallel and then wait for their completion. */
static bool parallel;
const char *dso_to_test;
const char *test_objdump_path = "objdump";

/*
 * List of architecture specific tests. Not a weak symbol as the array length is
 * dependent on the initialization, as such GCC with LTO complains of
 * conflicting definitions with a weak symbol.
 */
#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || defined(__powerpc64__)
extern struct test_suite *arch_tests[];
#else
static struct test_suite *arch_tests[] = {
	NULL,
};
#endif

static struct test_suite *generic_tests[] = {
	&suite__vmlinux_matches_kallsyms,
#ifdef HAVE_LIBTRACEEVENT
	&suite__openat_syscall_event,
	&suite__openat_syscall_event_on_all_cpus,
	&suite__basic_mmap,
#endif
	&suite__mem,
	&suite__parse_events,
	&suite__expr,
	&suite__PERF_RECORD,
	&suite__pmu,
	&suite__pmu_events,
	&suite__dso_data,
	&suite__perf_evsel__roundtrip_name_test,
#ifdef HAVE_LIBTRACEEVENT
	&suite__perf_evsel__tp_sched_test,
	&suite__syscall_openat_tp_fields,
#endif
	&suite__attr,
	&suite__hists_link,
	&suite__python_use,
	&suite__bp_signal,
	&suite__bp_signal_overflow,
	&suite__bp_accounting,
	&suite__wp,
	&suite__task_exit,
	&suite__sw_clock_freq,
	&suite__code_reading,
	&suite__sample_parsing,
	&suite__keep_tracking,
	&suite__parse_no_sample_id_all,
	&suite__hists_filter,
	&suite__mmap_thread_lookup,
	&suite__thread_maps_share,
	&suite__hists_output,
	&suite__hists_cumulate,
#ifdef HAVE_LIBTRACEEVENT
	&suite__switch_tracking,
#endif
	&suite__fdarray__filter,
	&suite__fdarray__add,
	&suite__kmod_path__parse,
	&suite__thread_map,
	&suite__session_topology,
	&suite__thread_map_synthesize,
	&suite__thread_map_remove,
	&suite__cpu_map,
	&suite__synthesize_stat_config,
	&suite__synthesize_stat,
	&suite__synthesize_stat_round,
	&suite__event_update,
	&suite__event_times,
	&suite__backward_ring_buffer,
	&suite__sdt_event,
	&suite__is_printable_array,
	&suite__bitmap_print,
	&suite__perf_hooks,
	&suite__unit_number__scnprint,
	&suite__mem2node,
	&suite__time_utils,
	&suite__jit_write_elf,
	&suite__pfm,
	&suite__api_io,
	&suite__maps__merge_in,
	&suite__demangle_java,
	&suite__demangle_ocaml,
	&suite__parse_metric,
	&suite__pe_file_parsing,
	&suite__expand_cgroup_events,
	&suite__perf_time_to_tsc,
	&suite__dlfilter,
	&suite__sigtrap,
	&suite__event_groups,
	&suite__symbols,
	&suite__util,
	NULL,
};

static struct test_suite **tests[] = {
	generic_tests,
	arch_tests,
	NULL, /* shell tests created at runtime. */
};

static struct test_workload *workloads[] = {
	&workload__noploop,
	&workload__thloop,
	&workload__leafloop,
	&workload__sqrtloop,
	&workload__brstack,
	&workload__datasym,
};

static int num_subtests(const struct test_suite *t)
{
	int num;

	if (!t->test_cases)
		return 0;

	num = 0;
	while (t->test_cases[num].name)
		num++;

	return num;
}

static bool has_subtests(const struct test_suite *t)
{
	return num_subtests(t) > 1;
}

static const char *skip_reason(const struct test_suite *t, int subtest)
{
	if (!t->test_cases)
		return NULL;

	return t->test_cases[subtest >= 0 ? subtest : 0].skip_reason;
}

static const char *test_description(const struct test_suite *t, int subtest)
{
	if (t->test_cases && subtest >= 0)
		return t->test_cases[subtest].desc;

	return t->desc;
}

static test_fnptr test_function(const struct test_suite *t, int subtest)
{
	if (subtest <= 0)
		return t->test_cases[0].run_case;

	return t->test_cases[subtest].run_case;
}

static bool perf_test__matches(const char *desc, int curr, int argc, const char *argv[])
{
	int i;

	if (argc == 0)
		return true;

	for (i = 0; i < argc; ++i) {
		char *end;
		long nr = strtoul(argv[i], &end, 10);

		if (*end == '\0') {
			if (nr == curr + 1)
				return true;
			continue;
		}

		if (strcasestr(desc, argv[i]))
			return true;
	}

	return false;
}

struct child_test {
	struct child_process process;
	struct test_suite *test;
	int test_num;
	int subtest;
};

static int run_test_child(struct child_process *process)
{
	struct child_test *child = container_of(process, struct child_test, process);
	int err;

	pr_debug("--- start ---\n");
	pr_debug("test child forked, pid %d\n", getpid());
	err = test_function(child->test, child->subtest)(child->test, child->subtest);
	pr_debug("---- end(%d) ----\n", err);
	fflush(NULL);
	return -err;
}

static int print_test_result(struct test_suite *t, int i, int subtest, int result, int width)
{
	if (has_subtests(t)) {
		int subw = width > 2 ? width - 2 : width;

		pr_info("%3d.%1d: %-*s:", i + 1, subtest + 1, subw, test_description(t, subtest));
	} else
		pr_info("%3d: %-*s:", i + 1, width, test_description(t, subtest));

	switch (result) {
	case TEST_OK:
		pr_info(" Ok\n");
		break;
	case TEST_SKIP: {
		const char *reason = skip_reason(t, subtest);

		if (reason)
			color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (%s)\n", reason);
		else
			color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip\n");
	}
		break;
	case TEST_FAIL:
	default:
		color_fprintf(stderr, PERF_COLOR_RED, " FAILED!\n");
		break;
	}

	return 0;
}

static int finish_test(struct child_test *child_test, int width)
{
	struct test_suite *t = child_test->test;
	int i = child_test->test_num;
	int subi = child_test->subtest;
	int out = child_test->process.out;
	int err = child_test->process.err;
	bool out_done = out <= 0;
	bool err_done = err <= 0;
	struct strbuf out_output = STRBUF_INIT;
	struct strbuf err_output = STRBUF_INIT;
	int ret;

	/*
	 * For test suites with subtests, display the suite name ahead of the
	 * sub test names.
	 */
	if (has_subtests(t) && subi == 0)
		pr_info("%3d: %-*s:\n", i + 1, width, test_description(t, -1));

	/*
	 * Busy loop reading from the child's stdout and stderr that are set to
	 * be non-blocking until EOF.
	 */
	if (!out_done)
		fcntl(out, F_SETFL, O_NONBLOCK);
	if (!err_done)
		fcntl(err, F_SETFL, O_NONBLOCK);
	if (verbose > 1) {
		if (has_subtests(t))
			pr_info("%3d.%1d: %s:\n", i + 1, subi + 1, test_description(t, subi));
		else
			pr_info("%3d: %s:\n", i + 1, test_description(t, -1));
	}
	while (!out_done || !err_done) {
		struct pollfd pfds[2] = {
			{ .fd = out,
			  .events = POLLIN | POLLERR | POLLHUP | POLLNVAL,
			},
			{ .fd = err,
			  .events = POLLIN | POLLERR | POLLHUP | POLLNVAL,
			},
		};
		char buf[512];
		ssize_t len;

		/* Poll to avoid excessive spinning, timeout set for 1000ms. */
		poll(pfds, ARRAY_SIZE(pfds), /*timeout=*/1000);
		if (!out_done && pfds[0].revents) {
			errno = 0;
			len = read(out, buf, sizeof(buf) - 1);

			if (len <= 0) {
				out_done = errno != EAGAIN;
			} else {
				buf[len] = '\0';
				if (verbose > 1)
					fprintf(stdout, "%s", buf);
				else
					strbuf_addstr(&out_output, buf);
			}
		}
		if (!err_done && pfds[1].revents) {
			errno = 0;
			len = read(err, buf, sizeof(buf) - 1);

			if (len <= 0) {
				err_done = errno != EAGAIN;
			} else {
				buf[len] = '\0';
				if (verbose > 1)
					fprintf(stdout, "%s", buf);
				else
					strbuf_addstr(&err_output, buf);
			}
		}
	}
	/* Clean up child process. */
	ret = finish_command(&child_test->process);
	if (verbose == 1 && ret == TEST_FAIL) {
		/* Add header for test that was skipped above. */
		if (has_subtests(t))
			pr_info("%3d.%1d: %s:\n", i + 1, subi + 1, test_description(t, subi));
		else
			pr_info("%3d: %s:\n", i + 1, test_description(t, -1));
		fprintf(stdout, "%s", out_output.buf);
		fprintf(stderr, "%s", err_output.buf);
	}
	strbuf_release(&out_output);
	strbuf_release(&err_output);
	print_test_result(t, i, subi, ret, width);
	if (out > 0)
		close(out);
	if (err > 0)
		close(err);
	return 0;
}

static int start_test(struct test_suite *test, int i, int subi, struct child_test **child,
		      int width)
{
	int err;

	*child = NULL;
	if (dont_fork) {
		pr_debug("--- start ---\n");
		err = test_function(test, subi)(test, subi);
		pr_debug("---- end ----\n");
		print_test_result(test, i, subi, err, width);
		return 0;
	}

	*child = zalloc(sizeof(**child));
	if (!*child)
		return -ENOMEM;

	(*child)->test = test;
	(*child)->test_num = i;
	(*child)->subtest = subi;
	(*child)->process.pid = -1;
	(*child)->process.no_stdin = 1;
	if (verbose <= 0) {
		(*child)->process.no_stdout = 1;
		(*child)->process.no_stderr = 1;
	} else {
		(*child)->process.out = -1;
		(*child)->process.err = -1;
	}
	(*child)->process.no_exec_cmd = run_test_child;
	err = start_command(&(*child)->process);
	if (err || parallel)
		return  err;
	return finish_test(*child, width);
}

#define for_each_test(j, k, t)					\
	for (j = 0, k = 0; j < ARRAY_SIZE(tests); j++, k = 0)	\
		while ((t = tests[j][k++]) != NULL)

static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist)
{
	struct test_suite *t;
	unsigned int j, k;
	int i = 0;
	int width = 0;
	size_t num_tests = 0;
	struct child_test **child_tests;
	int child_test_num = 0;

	for_each_test(j, k, t) {
		int len = strlen(test_description(t, -1));

		if (width < len)
			width = len;

		if (has_subtests(t)) {
			for (int subi = 0, subn = num_subtests(t); subi < subn; subi++) {
				len = strlen(test_description(t, subi));
				if (width < len)
					width = len;
				num_tests++;
			}
		} else {
			num_tests++;
		}
	}
	child_tests = calloc(num_tests, sizeof(*child_tests));
	if (!child_tests)
		return -ENOMEM;

	for_each_test(j, k, t) {
		int curr = i++;

		if (!perf_test__matches(test_description(t, -1), curr, argc, argv)) {
			bool skip = true;

			for (int subi = 0, subn = num_subtests(t); subi < subn; subi++) {
				if (perf_test__matches(test_description(t, subi),
							curr, argc, argv))
					skip = false;
			}

			if (skip)
				continue;
		}

		if (intlist__find(skiplist, i)) {
			pr_info("%3d: %-*s:", curr + 1, width, test_description(t, -1));
			color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (user override)\n");
			continue;
		}

		if (!has_subtests(t)) {
			int err = start_test(t, curr, -1, &child_tests[child_test_num++], width);

			if (err) {
				/* TODO: if parallel waitpid the already forked children. */
				free(child_tests);
				return err;
			}
		} else {
			for (int subi = 0, subn = num_subtests(t); subi < subn; subi++) {
				int err;

				if (!perf_test__matches(test_description(t, subi),
							curr, argc, argv))
					continue;

				err = start_test(t, curr, subi, &child_tests[child_test_num++],
						 width);
				if (err)
					return err;
			}
		}
	}
	for (i = 0; i < child_test_num; i++) {
		if (parallel) {
			int ret  = finish_test(child_tests[i], width);

			if (ret)
				return ret;
		}
		free(child_tests[i]);
	}
	free(child_tests);
	return 0;
}

static int perf_test__list(int argc, const char **argv)
{
	unsigned int j, k;
	struct test_suite *t;
	int i = 0;

	for_each_test(j, k, t) {
		int curr = i++;

		if (!perf_test__matches(test_description(t, -1), curr, argc, argv))
			continue;

		pr_info("%3d: %s\n", i, test_description(t, -1));

		if (has_subtests(t)) {
			int subn = num_subtests(t);
			int subi;

			for (subi = 0; subi < subn; subi++)
				pr_info("%3d:%1d: %s\n", i, subi + 1,
					test_description(t, subi));
		}
	}
	return 0;
}

static int run_workload(const char *work, int argc, const char **argv)
{
	unsigned int i = 0;
	struct test_workload *twl;

	for (i = 0; i < ARRAY_SIZE(workloads); i++) {
		twl = workloads[i];
		if (!strcmp(twl->name, work))
			return twl->func(argc, argv);
	}

	pr_info("No workload found: %s\n", work);
	return -1;
}

static int perf_test__config(const char *var, const char *value,
			     void *data __maybe_unused)
{
	if (!strcmp(var, "annotate.objdump"))
		test_objdump_path = value;

	return 0;
}

int cmd_test(int argc, const char **argv)
{
	const char *test_usage[] = {
	"perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
	NULL,
	};
	const char *skip = NULL;
	const char *workload = NULL;
	const struct option test_options[] = {
	OPT_STRING('s', "skip", &skip, "tests", "tests to skip"),
	OPT_INCR('v', "verbose", &verbose,
		    "be more verbose (show symbol address, etc)"),
	OPT_BOOLEAN('F', "dont-fork", &dont_fork,
		    "Do not fork for testcase"),
	OPT_BOOLEAN('p', "parallel", &parallel,
		    "Run the tests altogether in parallel"),
	OPT_STRING('w', "workload", &workload, "work", "workload to run for testing"),
	OPT_STRING(0, "dso", &dso_to_test, "dso", "dso to test"),
	OPT_STRING(0, "objdump", &test_objdump_path, "path",
		   "objdump binary to use for disassembly and annotations"),
	OPT_END()
	};
	const char * const test_subcommands[] = { "list", NULL };
	struct intlist *skiplist = NULL;
        int ret = hists__init();

        if (ret < 0)
                return ret;

	perf_config(perf_test__config, NULL);

	/* Unbuffered output */
	setvbuf(stdout, NULL, _IONBF, 0);

	tests[2] = create_script_test_suites();
	argc = parse_options_subcommand(argc, argv, test_options, test_subcommands, test_usage, 0);
	if (argc >= 1 && !strcmp(argv[0], "list"))
		return perf_test__list(argc - 1, argv + 1);

	if (workload)
		return run_workload(workload, argc, argv);

	symbol_conf.priv_size = sizeof(int);
	symbol_conf.try_vmlinux_path = true;

	if (symbol__init(NULL) < 0)
		return -1;

	if (skip != NULL)
		skiplist = intlist__new(skip);
	/*
	 * Tests that create BPF maps, for instance, need more than the 64K
	 * default:
	 */
	rlimit__bump_memlock();

	return __cmd_test(argc, argv, skiplist);
}