tools/perf/tests/builtin-test.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * builtin-test.c
   4  *
   5  * Builtin regression testing command: ever growing number of sanity tests
   6  */
   7 #include <fcntl.h>
   8 #include <errno.h>
   9 #include <poll.h>
  10 #include <unistd.h>
  11 #include <setjmp.h>
  12 #include <string.h>
  13 #include <stdlib.h>
  14 #include <sys/types.h>
  15 #include <dirent.h>
  16 #include <sys/wait.h>
  17 #include <sys/stat.h>
  18 #include "builtin.h"
  19 #include "config.h"
  20 #include "hist.h"
  21 #include "intlist.h"
  22 #include "tests.h"
  23 #include "debug.h"
  24 #include "color.h"
  25 #include <subcmd/parse-options.h>
  26 #include <subcmd/run-command.h>
  27 #include "string2.h"
  28 #include "symbol.h"
  29 #include "util/rlimit.h"
  30 #include "util/strbuf.h"
  31 #include <linux/kernel.h>
  32 #include <linux/string.h>
  33 #include <subcmd/exec-cmd.h>
  34 #include <linux/zalloc.h>
  35
  36 #include "tests-scripts.h"
  37
  38 /*
  39  * Command line option to not fork the test running in the same process and
  40  * making them easier to debug.
  41  */
  42 static bool dont_fork;
  43 /* Fork the tests in parallel and wait for their completion. */
  44 static bool sequential;
  45 const char *dso_to_test;
  46 const char *test_objdump_path = "objdump";
  47
  48 /*
  49  * List of architecture specific tests. Not a weak symbol as the array length is
  50  * dependent on the initialization, as such GCC with LTO complains of
  51  * conflicting definitions with a weak symbol.
  52  */
  53 #if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || defined(__powerpc64__)
  54 extern struct test_suite *arch_tests[];
  55 #else
  56 static struct test_suite *arch_tests[] = {
  57         NULL,
  58 };
  59 #endif
  60
  61 static struct test_suite *generic_tests[] = {
  62         &suite__vmlinux_matches_kallsyms,
  63 #ifdef HAVE_LIBTRACEEVENT
  64         &suite__openat_syscall_event,
  65         &suite__openat_syscall_event_on_all_cpus,
  66         &suite__basic_mmap,
  67 #endif
  68         &suite__mem,
  69         &suite__parse_events,
  70         &suite__expr,
  71         &suite__PERF_RECORD,
  72         &suite__pmu,
  73         &suite__pmu_events,
  74         &suite__hwmon_pmu,
  75         &suite__tool_pmu,
  76         &suite__dso_data,
  77         &suite__perf_evsel__roundtrip_name_test,
  78 #ifdef HAVE_LIBTRACEEVENT
  79         &suite__perf_evsel__tp_sched_test,
  80         &suite__syscall_openat_tp_fields,
  81 #endif
  82         &suite__hists_link,
  83         &suite__python_use,
  84         &suite__bp_signal,
  85         &suite__bp_signal_overflow,
  86         &suite__bp_accounting,
  87         &suite__wp,
  88         &suite__task_exit,
  89         &suite__sw_clock_freq,
  90         &suite__code_reading,
  91         &suite__sample_parsing,
  92         &suite__keep_tracking,
  93         &suite__parse_no_sample_id_all,
  94         &suite__hists_filter,
  95         &suite__mmap_thread_lookup,
  96         &suite__thread_maps_share,
  97         &suite__hists_output,
  98         &suite__hists_cumulate,
  99 #ifdef HAVE_LIBTRACEEVENT
 100         &suite__switch_tracking,
 101 #endif
 102         &suite__fdarray__filter,
 103         &suite__fdarray__add,
 104         &suite__kmod_path__parse,
 105         &suite__thread_map,
 106         &suite__session_topology,
 107         &suite__thread_map_synthesize,
 108         &suite__thread_map_remove,
 109         &suite__cpu_map,
 110         &suite__synthesize_stat_config,
 111         &suite__synthesize_stat,
 112         &suite__synthesize_stat_round,
 113         &suite__event_update,
 114         &suite__event_times,
 115         &suite__backward_ring_buffer,
 116         &suite__sdt_event,
 117         &suite__is_printable_array,
 118         &suite__bitmap_print,
 119         &suite__perf_hooks,
 120         &suite__unit_number__scnprint,
 121         &suite__mem2node,
 122         &suite__time_utils,
 123         &suite__jit_write_elf,
 124         &suite__pfm,
 125         &suite__api_io,
 126         &suite__maps__merge_in,
 127         &suite__demangle_java,
 128         &suite__demangle_ocaml,
 129         &suite__parse_metric,
 130         &suite__pe_file_parsing,
 131         &suite__expand_cgroup_events,
 132         &suite__perf_time_to_tsc,
 133         &suite__dlfilter,
 134         &suite__sigtrap,
 135         &suite__event_groups,
 136         &suite__symbols,
 137         &suite__util,
 138         NULL,
 139 };
 140
 141 static struct test_workload *workloads[] = {
 142         &workload__noploop,
 143         &workload__thloop,
 144         &workload__leafloop,
 145         &workload__sqrtloop,
 146         &workload__brstack,
 147         &workload__datasym,
 148         &workload__landlock,
 149 };
 150
 151 #define workloads__for_each(workload) \
 152         for (unsigned i = 0; i < ARRAY_SIZE(workloads) && ({ workload = workloads[i]; 1; }); i++)
 153
 154 static int num_subtests(const struct test_suite *t)
 155 {
 156         int num;
 157
 158         if (!t->test_cases)
 159                 return 0;
 160
 161         num = 0;
 162         while (t->test_cases[num].name)
 163                 num++;
 164
 165         return num;
 166 }
 167
 168 static bool has_subtests(const struct test_suite *t)
 169 {
 170         return num_subtests(t) > 1;
 171 }
 172
 173 static const char *skip_reason(const struct test_suite *t, int subtest)
 174 {
 175         if (!t->test_cases)
 176                 return NULL;
 177
 178         return t->test_cases[subtest >= 0 ? subtest : 0].skip_reason;
 179 }
 180
 181 static const char *test_description(const struct test_suite *t, int subtest)
 182 {
 183         if (t->test_cases && subtest >= 0)
 184                 return t->test_cases[subtest].desc;
 185
 186         return t->desc;
 187 }
 188
 189 static test_fnptr test_function(const struct test_suite *t, int subtest)
 190 {
 191         if (subtest <= 0)
 192                 return t->test_cases[0].run_case;
 193
 194         return t->test_cases[subtest].run_case;
 195 }
 196
 197 static bool test_exclusive(const struct test_suite *t, int subtest)
 198 {
 199         if (subtest <= 0)
 200                 return t->test_cases[0].exclusive;
 201
 202         return t->test_cases[subtest].exclusive;
 203 }
 204
 205 static bool perf_test__matches(const char *desc, int curr, int argc, const char *argv[])
 206 {
 207         int i;
 208
 209         if (argc == 0)
 210                 return true;
 211
 212         for (i = 0; i < argc; ++i) {
 213                 char *end;
 214                 long nr = strtoul(argv[i], &end, 10);
 215
 216                 if (*end == '\0') {
 217                         if (nr == curr + 1)
 218                                 return true;
 219                         continue;
 220                 }
 221
 222                 if (strcasestr(desc, argv[i]))
 223                         return true;
 224         }
 225
 226         return false;
 227 }
 228
 229 struct child_test {
 230         struct child_process process;
 231         struct test_suite *test;
 232         int test_num;
 233         int subtest;
 234 };
 235
 236 static jmp_buf run_test_jmp_buf;
 237
 238 static void child_test_sig_handler(int sig)
 239 {
 240         siglongjmp(run_test_jmp_buf, sig);
 241 }
 242
 243 static int run_test_child(struct child_process *process)
 244 {
 245         const int signals[] = {
 246                 SIGABRT, SIGBUS, SIGFPE, SIGILL, SIGINT, SIGPIPE, SIGQUIT, SIGSEGV, SIGTERM,
 247         };
 248         struct child_test *child = container_of(process, struct child_test, process);
 249         int err;
 250
 251         err = sigsetjmp(run_test_jmp_buf, 1);
 252         if (err) {
 253                 fprintf(stderr, "\n---- unexpected signal (%d) ----\n", err);
 254                 err = err > 0 ? -err : -1;
 255                 goto err_out;
 256         }
 257
 258         for (size_t i = 0; i < ARRAY_SIZE(signals); i++)
 259                 signal(signals[i], child_test_sig_handler);
 260
 261         pr_debug("--- start ---\n");
 262         pr_debug("test child forked, pid %d\n", getpid());
 263         err = test_function(child->test, child->subtest)(child->test, child->subtest);
 264         pr_debug("---- end(%d) ----\n", err);
 265
 266 err_out:
 267         fflush(NULL);
 268         for (size_t i = 0; i < ARRAY_SIZE(signals); i++)
 269                 signal(signals[i], SIG_DFL);
 270         return -err;
 271 }
 272
 273 #define TEST_RUNNING -3
 274
 275 static int print_test_result(struct test_suite *t, int i, int subtest, int result, int width,
 276                              int running)
 277 {
 278         if (has_subtests(t)) {
 279                 int subw = width > 2 ? width - 2 : width;
 280
 281                 pr_info("%3d.%1d: %-*s:", i + 1, subtest + 1, subw, test_description(t, subtest));
 282         } else
 283                 pr_info("%3d: %-*s:", i + 1, width, test_description(t, subtest));
 284
 285         switch (result) {
 286         case TEST_RUNNING:
 287                 color_fprintf(stderr, PERF_COLOR_YELLOW, " Running (%d active)\n", running);
 288                 break;
 289         case TEST_OK:
 290                 pr_info(" Ok\n");
 291                 break;
 292         case TEST_SKIP: {
 293                 const char *reason = skip_reason(t, subtest);
 294
 295                 if (reason)
 296                         color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (%s)\n", reason);
 297                 else
 298                         color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip\n");
 299         }
 300                 break;
 301         case TEST_FAIL:
 302         default:
 303                 color_fprintf(stderr, PERF_COLOR_RED, " FAILED!\n");
 304                 break;
 305         }
 306
 307         return 0;
 308 }
 309
 310 static void finish_test(struct child_test **child_tests, int running_test, int child_test_num,
 311                 int width)
 312 {
 313         struct child_test *child_test = child_tests[running_test];
 314         struct test_suite *t;
 315         int i, subi, err;
 316         bool err_done = false;
 317         struct strbuf err_output = STRBUF_INIT;
 318         int last_running = -1;
 319         int ret;
 320
 321         if (child_test == NULL) {
 322                 /* Test wasn't started. */
 323                 return;
 324         }
 325         t = child_test->test;
 326         i = child_test->test_num;
 327         subi = child_test->subtest;
 328         err = child_test->process.err;
 329         /*
 330          * For test suites with subtests, display the suite name ahead of the
 331          * sub test names.
 332          */
 333         if (has_subtests(t) && subi == 0)
 334                 pr_info("%3d: %-*s:\n", i + 1, width, test_description(t, -1));
 335
 336         /*
 337          * Busy loop reading from the child's stdout/stderr that are set to be
 338          * non-blocking until EOF.
 339          */
 340         if (err > 0)
 341                 fcntl(err, F_SETFL, O_NONBLOCK);
 342         if (verbose > 1) {
 343                 if (has_subtests(t))
 344                         pr_info("%3d.%1d: %s:\n", i + 1, subi + 1, test_description(t, subi));
 345                 else
 346                         pr_info("%3d: %s:\n", i + 1, test_description(t, -1));
 347         }
 348         while (!err_done) {
 349                 struct pollfd pfds[1] = {
 350                         { .fd = err,
 351                           .events = POLLIN | POLLERR | POLLHUP | POLLNVAL,
 352                         },
 353                 };
 354                 if (perf_use_color_default) {
 355                         int running = 0;
 356
 357                         for (int y = running_test; y < child_test_num; y++) {
 358                                 if (child_tests[y] == NULL)
 359                                         continue;
 360                                 if (check_if_command_finished(&child_tests[y]->process) == 0)
 361                                         running++;
 362                         }
 363                         if (running != last_running) {
 364                                 if (last_running != -1) {
 365                                         /*
 366                                          * Erase "Running (.. active)" line
 367                                          * printed before poll/sleep.
 368                                          */
 369                                         fprintf(debug_file(), PERF_COLOR_DELETE_LINE);
 370                                 }
 371                                 print_test_result(t, i, subi, TEST_RUNNING, width, running);
 372                                 last_running = running;
 373                         }
 374                 }
 375
 376                 err_done = true;
 377                 if (err <= 0) {
 378                         /* No child stderr to poll, sleep for 10ms for child to complete. */
 379                         usleep(10 * 1000);
 380                 } else {
 381                         /* Poll to avoid excessive spinning, timeout set for 100ms. */
 382                         poll(pfds, ARRAY_SIZE(pfds), /*timeout=*/100);
 383                         if (pfds[0].revents) {
 384                                 char buf[512];
 385                                 ssize_t len;
 386
 387                                 len = read(err, buf, sizeof(buf) - 1);
 388
 389                                 if (len > 0) {
 390                                         err_done = false;
 391                                         buf[len] = '\0';
 392                                         strbuf_addstr(&err_output, buf);
 393                                 }
 394                         }
 395                 }
 396                 if (err_done)
 397                         err_done = check_if_command_finished(&child_test->process);
 398         }
 399         if (perf_use_color_default && last_running != -1) {
 400                 /* Erase "Running (.. active)" line printed before poll/sleep. */
 401                 fprintf(debug_file(), PERF_COLOR_DELETE_LINE);
 402         }
 403         /* Clean up child process. */
 404         ret = finish_command(&child_test->process);
 405         if (verbose > 1 || (verbose == 1 && ret == TEST_FAIL))
 406                 fprintf(stderr, "%s", err_output.buf);
 407
 408         strbuf_release(&err_output);
 409         print_test_result(t, i, subi, ret, width, /*running=*/0);
 410         if (err > 0)
 411                 close(err);
 412         zfree(&child_tests[running_test]);
 413 }
 414
 415 static int start_test(struct test_suite *test, int i, int subi, struct child_test **child,
 416                 int width, int pass)
 417 {
 418         int err;
 419
 420         *child = NULL;
 421         if (dont_fork) {
 422                 if (pass == 1) {
 423                         pr_debug("--- start ---\n");
 424                         err = test_function(test, subi)(test, subi);
 425                         pr_debug("---- end ----\n");
 426                         print_test_result(test, i, subi, err, width, /*running=*/0);
 427                 }
 428                 return 0;
 429         }
 430         if (pass == 1 && !sequential && test_exclusive(test, subi)) {
 431                 /* When parallel, skip exclusive tests on the first pass. */
 432                 return 0;
 433         }
 434         if (pass != 1 && (sequential || !test_exclusive(test, subi))) {
 435                 /* Sequential and non-exclusive tests were run on the first pass. */
 436                 return 0;
 437         }
 438         *child = zalloc(sizeof(**child));
 439         if (!*child)
 440                 return -ENOMEM;
 441
 442         (*child)->test = test;
 443         (*child)->test_num = i;
 444         (*child)->subtest = subi;
 445         (*child)->process.pid = -1;
 446         (*child)->process.no_stdin = 1;
 447         if (verbose <= 0) {
 448                 (*child)->process.no_stdout = 1;
 449                 (*child)->process.no_stderr = 1;
 450         } else {
 451                 (*child)->process.stdout_to_stderr = 1;
 452                 (*child)->process.out = -1;
 453                 (*child)->process.err = -1;
 454         }
 455         (*child)->process.no_exec_cmd = run_test_child;
 456         if (sequential || pass == 2) {
 457                 err = start_command(&(*child)->process);
 458                 if (err)
 459                         return err;
 460                 finish_test(child, /*running_test=*/0, /*child_test_num=*/1, width);
 461                 return 0;
 462         }
 463         return start_command(&(*child)->process);
 464 }
 465
 466 /* State outside of __cmd_test for the sake of the signal handler. */
 467
 468 static size_t num_tests;
 469 static struct child_test **child_tests;
 470 static jmp_buf cmd_test_jmp_buf;
 471
 472 static void cmd_test_sig_handler(int sig)
 473 {
 474         siglongjmp(cmd_test_jmp_buf, sig);
 475 }
 476
 477 static int __cmd_test(struct test_suite **suites, int argc, const char *argv[],
 478                       struct intlist *skiplist)
 479 {
 480         static int width = 0;
 481         int err = 0;
 482
 483         for (struct test_suite **t = suites; *t; t++) {
 484                 int len = strlen(test_description(*t, -1));
 485
 486                 if (width < len)
 487                         width = len;
 488
 489                 if (has_subtests(*t)) {
 490                         for (int subi = 0, subn = num_subtests(*t); subi < subn; subi++) {
 491                                 len = strlen(test_description(*t, subi));
 492                                 if (width < len)
 493                                         width = len;
 494                                 num_tests++;
 495                         }
 496                 } else {
 497                         num_tests++;
 498                 }
 499         }
 500         child_tests = calloc(num_tests, sizeof(*child_tests));
 501         if (!child_tests)
 502                 return -ENOMEM;
 503
 504         err = sigsetjmp(cmd_test_jmp_buf, 1);
 505         if (err) {
 506                 pr_err("\nSignal (%d) while running tests.\nTerminating tests with the same signal\n",
 507                        err);
 508                 for (size_t x = 0; x < num_tests; x++) {
 509                         struct child_test *child_test = child_tests[x];
 510
 511                         if (!child_test)
 512                                 continue;
 513
 514                         pr_debug3("Killing %d pid %d\n",
 515                                   child_test->test_num + 1,
 516                                   child_test->process.pid);
 517                         kill(child_test->process.pid, err);
 518                 }
 519                 goto err_out;
 520         }
 521         signal(SIGINT, cmd_test_sig_handler);
 522         signal(SIGTERM, cmd_test_sig_handler);
 523
 524         /*
 525          * In parallel mode pass 1 runs non-exclusive tests in parallel, pass 2
 526          * runs the exclusive tests sequentially. In other modes all tests are
 527          * run in pass 1.
 528          */
 529         for (int pass = 1; pass <= 2; pass++) {
 530                 int child_test_num = 0;
 531                 int i = 0;
 532
 533                 for (struct test_suite **t = suites; *t; t++) {
 534                         int curr = i++;
 535
 536                         if (!perf_test__matches(test_description(*t, -1), curr, argc, argv)) {
 537                                 /*
 538                                  * Test suite shouldn't be run based on
 539                                  * description. See if subtest should.
 540                                  */
 541                                 bool skip = true;
 542
 543                                 for (int subi = 0, subn = num_subtests(*t); subi < subn; subi++) {
 544                                         if (perf_test__matches(test_description(*t, subi),
 545                                                                 curr, argc, argv))
 546                                                 skip = false;
 547                                 }
 548
 549                                 if (skip)
 550                                         continue;
 551                         }
 552
 553                         if (intlist__find(skiplist, i)) {
 554                                 pr_info("%3d: %-*s:", curr + 1, width, test_description(*t, -1));
 555                                 color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (user override)\n");
 556                                 continue;
 557                         }
 558
 559                         if (!has_subtests(*t)) {
 560                                 err = start_test(*t, curr, -1, &child_tests[child_test_num++],
 561                                                  width, pass);
 562                                 if (err)
 563                                         goto err_out;
 564                                 continue;
 565                         }
 566                         for (int subi = 0, subn = num_subtests(*t); subi < subn; subi++) {
 567                                 if (!perf_test__matches(test_description(*t, subi),
 568                                                         curr, argc, argv))
 569                                         continue;
 570
 571                                 err = start_test(*t, curr, subi, &child_tests[child_test_num++],
 572                                                  width, pass);
 573                                 if (err)
 574                                         goto err_out;
 575                         }
 576                 }
 577                 if (!sequential) {
 578                         /* Parallel mode starts tests but doesn't finish them. Do that now. */
 579                         for (size_t x = 0; x < num_tests; x++)
 580                                 finish_test(child_tests, x, num_tests, width);
 581                 }
 582         }
 583 err_out:
 584         signal(SIGINT, SIG_DFL);
 585         signal(SIGTERM, SIG_DFL);
 586         if (err) {
 587                 pr_err("Internal test harness failure. Completing any started tests:\n:");
 588                 for (size_t x = 0; x < num_tests; x++)
 589                         finish_test(child_tests, x, num_tests, width);
 590         }
 591         free(child_tests);
 592         return err;
 593 }
 594
 595 static int perf_test__list(struct test_suite **suites, int argc, const char **argv)
 596 {
 597         int i = 0;
 598
 599         for (struct test_suite **t = suites; *t; t++) {
 600                 int curr = i++;
 601
 602                 if (!perf_test__matches(test_description(*t, -1), curr, argc, argv))
 603                         continue;
 604
 605                 pr_info("%3d: %s\n", i, test_description(*t, -1));
 606
 607                 if (has_subtests(*t)) {
 608                         int subn = num_subtests(*t);
 609                         int subi;
 610
 611                         for (subi = 0; subi < subn; subi++)
 612                                 pr_info("%3d:%1d: %s\n", i, subi + 1,
 613                                         test_description(*t, subi));
 614                 }
 615         }
 616         return 0;
 617 }
 618
 619 static int workloads__fprintf_list(FILE *fp)
 620 {
 621         struct test_workload *twl;
 622         int printed = 0;
 623
 624         workloads__for_each(twl)
 625                 printed += fprintf(fp, "%s\n", twl->name);
 626
 627         return printed;
 628 }
 629
 630 static int run_workload(const char *work, int argc, const char **argv)
 631 {
 632         struct test_workload *twl;
 633
 634         workloads__for_each(twl) {
 635                 if (!strcmp(twl->name, work))
 636                         return twl->func(argc, argv);
 637         }
 638
 639         pr_info("No workload found: %s\n", work);
 640         return -1;
 641 }
 642
 643 static int perf_test__config(const char *var, const char *value,
 644                              void *data __maybe_unused)
 645 {
 646         if (!strcmp(var, "annotate.objdump"))
 647                 test_objdump_path = value;
 648
 649         return 0;
 650 }
 651
 652 static struct test_suite **build_suites(void)
 653 {
 654         /*
 655          * TODO: suites is static to avoid needing to clean up the scripts tests
 656          * for leak sanitizer.
 657          */
 658         static struct test_suite **suites[] = {
 659                 generic_tests,
 660                 arch_tests,
 661                 NULL,
 662         };
 663         struct test_suite **result;
 664         struct test_suite *t;
 665         size_t n = 0, num_suites = 0;
 666
 667         if (suites[2] == NULL)
 668                 suites[2] = create_script_test_suites();
 669
 670 #define for_each_test(t)                                                \
 671         for (size_t i = 0, j = 0; i < ARRAY_SIZE(suites); i++, j = 0)   \
 672                 while ((t = suites[i][j++]) != NULL)
 673
 674         for_each_test(t)
 675                 num_suites++;
 676
 677         result = calloc(num_suites + 1, sizeof(struct test_suite *));
 678
 679         for (int pass = 1; pass <= 2; pass++) {
 680                 for_each_test(t) {
 681                         bool exclusive = false;
 682
 683                         if (!has_subtests(t)) {
 684                                 exclusive = test_exclusive(t, -1);
 685                         } else {
 686                                 for (int subi = 0, subn = num_subtests(t); subi < subn; subi++) {
 687                                         if (test_exclusive(t, subi)) {
 688                                                 exclusive = true;
 689                                                 break;
 690                                         }
 691                                 }
 692                         }
 693                         if ((!exclusive && pass == 1) || (exclusive && pass == 2))
 694                                 result[n++] = t;
 695                 }
 696         }
 697         return result;
 698 #undef for_each_test
 699 }
 700
 701 int cmd_test(int argc, const char **argv)
 702 {
 703         const char *test_usage[] = {
 704         "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
 705         NULL,
 706         };
 707         const char *skip = NULL;
 708         const char *workload = NULL;
 709         bool list_workloads = false;
 710         const struct option test_options[] = {
 711         OPT_STRING('s', "skip", &skip, "tests", "tests to skip"),
 712         OPT_INCR('v', "verbose", &verbose,
 713                     "be more verbose (show symbol address, etc)"),
 714         OPT_BOOLEAN('F', "dont-fork", &dont_fork,
 715                     "Do not fork for testcase"),
 716         OPT_BOOLEAN('S', "sequential", &sequential,
 717                     "Run the tests one after another rather than in parallel"),
 718         OPT_STRING('w', "workload", &workload, "work", "workload to run for testing, use '--list-workloads' to list the available ones."),
 719         OPT_BOOLEAN(0, "list-workloads", &list_workloads, "List the available builtin workloads to use with -w/--workload"),
 720         OPT_STRING(0, "dso", &dso_to_test, "dso", "dso to test"),
 721         OPT_STRING(0, "objdump", &test_objdump_path, "path",
 722                    "objdump binary to use for disassembly and annotations"),
 723         OPT_END()
 724         };
 725         const char * const test_subcommands[] = { "list", NULL };
 726         struct intlist *skiplist = NULL;
 727         int ret = hists__init();
 728         struct test_suite **suites;
 729
 730         if (ret < 0)
 731                 return ret;
 732
 733         perf_config(perf_test__config, NULL);
 734
 735         /* Unbuffered output */
 736         setvbuf(stdout, NULL, _IONBF, 0);
 737
 738         argc = parse_options_subcommand(argc, argv, test_options, test_subcommands, test_usage, 0);
 739         if (argc >= 1 && !strcmp(argv[0], "list")) {
 740                 suites = build_suites();
 741                 ret = perf_test__list(suites, argc - 1, argv + 1);
 742                 free(suites);
 743                 return ret;
 744         }
 745
 746         if (workload)
 747                 return run_workload(workload, argc, argv);
 748
 749         if (list_workloads) {
 750                 workloads__fprintf_list(stdout);
 751                 return 0;
 752         }
 753
 754         if (dont_fork)
 755                 sequential = true;
 756
 757         symbol_conf.priv_size = sizeof(int);
 758         symbol_conf.try_vmlinux_path = true;
 759
 760
 761         if (symbol__init(NULL) < 0)
 762                 return -1;
 763
 764         if (skip != NULL)
 765                 skiplist = intlist__new(skip);
 766         /*
 767          * Tests that create BPF maps, for instance, need more than the 64K
 768          * default:
 769          */
 770         rlimit__bump_memlock();
 771
 772         suites = build_suites();
 773         ret = __cmd_test(suites, argc, argv, skiplist);
 774         free(suites);
 775         return ret;
 776 }