1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2021 Red Hat Inc, Daniel Bristot de Oliveira <bristot@kernel.org> 4 */ 5 6 #define _GNU_SOURCE 7 #include <getopt.h> 8 #include <stdlib.h> 9 #include <string.h> 10 #include <signal.h> 11 #include <unistd.h> 12 #include <stdio.h> 13 #include <time.h> 14 #include <sched.h> 15 16 #include "osnoise.h" 17 #include "utils.h" 18 19 enum osnoise_mode { 20 MODE_OSNOISE = 0, 21 MODE_HWNOISE 22 }; 23 24 /* 25 * osnoise top parameters 26 */ 27 struct osnoise_top_params { 28 char *cpus; 29 cpu_set_t monitored_cpus; 30 char *trace_output; 31 char *cgroup_name; 32 unsigned long long runtime; 33 unsigned long long period; 34 long long threshold; 35 long long stop_us; 36 long long stop_total_us; 37 int sleep_time; 38 int duration; 39 int quiet; 40 int set_sched; 41 int cgroup; 42 int hk_cpus; 43 int warmup; 44 cpu_set_t hk_cpu_set; 45 struct sched_attr sched_param; 46 struct trace_events *events; 47 enum osnoise_mode mode; 48 }; 49 50 struct osnoise_top_cpu { 51 unsigned long long sum_runtime; 52 unsigned long long sum_noise; 53 unsigned long long max_noise; 54 unsigned long long max_sample; 55 56 unsigned long long hw_count; 57 unsigned long long nmi_count; 58 unsigned long long irq_count; 59 unsigned long long softirq_count; 60 unsigned long long thread_count; 61 62 int sum_cycles; 63 }; 64 65 struct osnoise_top_data { 66 struct osnoise_top_cpu *cpu_data; 67 int nr_cpus; 68 }; 69 70 /* 71 * osnoise_free_top - free runtime data 72 */ 73 static void 74 osnoise_free_top(struct osnoise_top_data *data) 75 { 76 free(data->cpu_data); 77 free(data); 78 } 79 80 /* 81 * osnoise_alloc_histogram - alloc runtime data 82 */ 83 static struct osnoise_top_data *osnoise_alloc_top(int nr_cpus) 84 { 85 struct osnoise_top_data *data; 86 87 data = calloc(1, sizeof(*data)); 88 if (!data) 89 return NULL; 90 91 data->nr_cpus = nr_cpus; 92 93 /* one set of histograms per CPU */ 94 data->cpu_data = calloc(1, sizeof(*data->cpu_data) * nr_cpus); 95 if (!data->cpu_data) 96 goto cleanup; 97 98 return data; 99 100 cleanup: 101 osnoise_free_top(data); 102 return NULL; 103 } 104 105 /* 106 * osnoise_top_handler - this is the handler for osnoise tracer events 107 */ 108 static int 109 osnoise_top_handler(struct trace_seq *s, struct tep_record *record, 110 struct tep_event *event, void *context) 111 { 112 struct trace_instance *trace = context; 113 struct osnoise_tool *tool; 114 unsigned long long val; 115 struct osnoise_top_cpu *cpu_data; 116 struct osnoise_top_data *data; 117 int cpu = record->cpu; 118 119 tool = container_of(trace, struct osnoise_tool, trace); 120 121 data = tool->data; 122 cpu_data = &data->cpu_data[cpu]; 123 124 cpu_data->sum_cycles++; 125 126 tep_get_field_val(s, event, "runtime", record, &val, 1); 127 update_sum(&cpu_data->sum_runtime, &val); 128 129 tep_get_field_val(s, event, "noise", record, &val, 1); 130 update_max(&cpu_data->max_noise, &val); 131 update_sum(&cpu_data->sum_noise, &val); 132 133 tep_get_field_val(s, event, "max_sample", record, &val, 1); 134 update_max(&cpu_data->max_sample, &val); 135 136 tep_get_field_val(s, event, "hw_count", record, &val, 1); 137 update_sum(&cpu_data->hw_count, &val); 138 139 tep_get_field_val(s, event, "nmi_count", record, &val, 1); 140 update_sum(&cpu_data->nmi_count, &val); 141 142 tep_get_field_val(s, event, "irq_count", record, &val, 1); 143 update_sum(&cpu_data->irq_count, &val); 144 145 tep_get_field_val(s, event, "softirq_count", record, &val, 1); 146 update_sum(&cpu_data->softirq_count, &val); 147 148 tep_get_field_val(s, event, "thread_count", record, &val, 1); 149 update_sum(&cpu_data->thread_count, &val); 150 151 return 0; 152 } 153 154 /* 155 * osnoise_top_header - print the header of the tool output 156 */ 157 static void osnoise_top_header(struct osnoise_tool *top) 158 { 159 struct osnoise_top_params *params = top->params; 160 struct trace_seq *s = top->trace.seq; 161 char duration[26]; 162 163 get_duration(top->start_time, duration, sizeof(duration)); 164 165 trace_seq_printf(s, "\033[2;37;40m"); 166 trace_seq_printf(s, " "); 167 168 if (params->mode == MODE_OSNOISE) { 169 trace_seq_printf(s, "Operating System Noise"); 170 trace_seq_printf(s, " "); 171 } else if (params->mode == MODE_HWNOISE) { 172 trace_seq_printf(s, "Hardware-related Noise"); 173 } 174 175 trace_seq_printf(s, " "); 176 trace_seq_printf(s, "\033[0;0;0m"); 177 trace_seq_printf(s, "\n"); 178 179 trace_seq_printf(s, "duration: %9s | time is in us\n", duration); 180 181 trace_seq_printf(s, "\033[2;30;47m"); 182 trace_seq_printf(s, "CPU Period Runtime "); 183 trace_seq_printf(s, " Noise "); 184 trace_seq_printf(s, " %% CPU Aval "); 185 trace_seq_printf(s, " Max Noise Max Single "); 186 trace_seq_printf(s, " HW NMI"); 187 188 if (params->mode == MODE_HWNOISE) 189 goto eol; 190 191 trace_seq_printf(s, " IRQ Softirq Thread"); 192 193 eol: 194 trace_seq_printf(s, "\033[0;0;0m"); 195 trace_seq_printf(s, "\n"); 196 } 197 198 /* 199 * clear_terminal - clears the output terminal 200 */ 201 static void clear_terminal(struct trace_seq *seq) 202 { 203 if (!config_debug) 204 trace_seq_printf(seq, "\033c"); 205 } 206 207 /* 208 * osnoise_top_print - prints the output of a given CPU 209 */ 210 static void osnoise_top_print(struct osnoise_tool *tool, int cpu) 211 { 212 struct osnoise_top_params *params = tool->params; 213 struct trace_seq *s = tool->trace.seq; 214 struct osnoise_top_cpu *cpu_data; 215 struct osnoise_top_data *data; 216 int percentage; 217 int decimal; 218 219 data = tool->data; 220 cpu_data = &data->cpu_data[cpu]; 221 222 if (!cpu_data->sum_runtime) 223 return; 224 225 percentage = ((cpu_data->sum_runtime - cpu_data->sum_noise) * 10000000) 226 / cpu_data->sum_runtime; 227 decimal = percentage % 100000; 228 percentage = percentage / 100000; 229 230 trace_seq_printf(s, "%3d #%-6d %12llu ", cpu, cpu_data->sum_cycles, cpu_data->sum_runtime); 231 trace_seq_printf(s, "%12llu ", cpu_data->sum_noise); 232 trace_seq_printf(s, " %3d.%05d", percentage, decimal); 233 trace_seq_printf(s, "%12llu %12llu", cpu_data->max_noise, cpu_data->max_sample); 234 235 trace_seq_printf(s, "%12llu ", cpu_data->hw_count); 236 trace_seq_printf(s, "%12llu ", cpu_data->nmi_count); 237 238 if (params->mode == MODE_HWNOISE) { 239 trace_seq_printf(s, "\n"); 240 return; 241 } 242 243 trace_seq_printf(s, "%12llu ", cpu_data->irq_count); 244 trace_seq_printf(s, "%12llu ", cpu_data->softirq_count); 245 trace_seq_printf(s, "%12llu\n", cpu_data->thread_count); 246 } 247 248 /* 249 * osnoise_print_stats - print data for all cpus 250 */ 251 static void 252 osnoise_print_stats(struct osnoise_top_params *params, struct osnoise_tool *top) 253 { 254 struct trace_instance *trace = &top->trace; 255 static int nr_cpus = -1; 256 int i; 257 258 if (nr_cpus == -1) 259 nr_cpus = sysconf(_SC_NPROCESSORS_CONF); 260 261 if (!params->quiet) 262 clear_terminal(trace->seq); 263 264 osnoise_top_header(top); 265 266 for (i = 0; i < nr_cpus; i++) { 267 if (params->cpus && !CPU_ISSET(i, ¶ms->monitored_cpus)) 268 continue; 269 osnoise_top_print(top, i); 270 } 271 272 trace_seq_do_printf(trace->seq); 273 trace_seq_reset(trace->seq); 274 } 275 276 /* 277 * osnoise_top_usage - prints osnoise top usage message 278 */ 279 static void osnoise_top_usage(struct osnoise_top_params *params, char *usage) 280 { 281 int i; 282 283 static const char * const msg[] = { 284 " [-h] [-q] [-D] [-d s] [-a us] [-p us] [-r us] [-s us] [-S us] \\", 285 " [-T us] [-t[=file]] [-e sys[:event]] [--filter <filter>] [--trigger <trigger>] \\", 286 " [-c cpu-list] [-H cpu-list] [-P priority] [-C[=cgroup_name]] [--warm-up s]", 287 "", 288 " -h/--help: print this menu", 289 " -a/--auto: set automatic trace mode, stopping the session if argument in us sample is hit", 290 " -p/--period us: osnoise period in us", 291 " -r/--runtime us: osnoise runtime in us", 292 " -s/--stop us: stop trace if a single sample is higher than the argument in us", 293 " -S/--stop-total us: stop trace if the total sample is higher than the argument in us", 294 " -T/--threshold us: the minimum delta to be considered a noise", 295 " -c/--cpus cpu-list: list of cpus to run osnoise threads", 296 " -H/--house-keeping cpus: run rtla control threads only on the given cpus", 297 " -C/--cgroup[=cgroup_name]: set cgroup, if no cgroup_name is passed, the rtla's cgroup will be inherited", 298 " -d/--duration time[s|m|h|d]: duration of the session", 299 " -D/--debug: print debug info", 300 " -t/--trace[=file]: save the stopped trace to [file|osnoise_trace.txt]", 301 " -e/--event <sys:event>: enable the <sys:event> in the trace instance, multiple -e are allowed", 302 " --filter <filter>: enable a trace event filter to the previous -e event", 303 " --trigger <trigger>: enable a trace event trigger to the previous -e event", 304 " -q/--quiet print only a summary at the end", 305 " -P/--priority o:prio|r:prio|f:prio|d:runtime:period : set scheduling parameters", 306 " o:prio - use SCHED_OTHER with prio", 307 " r:prio - use SCHED_RR with prio", 308 " f:prio - use SCHED_FIFO with prio", 309 " d:runtime[us|ms|s]:period[us|ms|s] - use SCHED_DEADLINE with runtime and period", 310 " in nanoseconds", 311 " --warm-up s: let the workload run for s seconds before collecting data", 312 NULL, 313 }; 314 315 if (usage) 316 fprintf(stderr, "%s\n", usage); 317 318 if (params->mode == MODE_OSNOISE) { 319 fprintf(stderr, 320 "rtla osnoise top: a per-cpu summary of the OS noise (version %s)\n", 321 VERSION); 322 323 fprintf(stderr, " usage: rtla osnoise [top]"); 324 } 325 326 if (params->mode == MODE_HWNOISE) { 327 fprintf(stderr, 328 "rtla hwnoise: a summary of hardware-related noise (version %s)\n", 329 VERSION); 330 331 fprintf(stderr, " usage: rtla hwnoise"); 332 } 333 334 for (i = 0; msg[i]; i++) 335 fprintf(stderr, "%s\n", msg[i]); 336 337 if (usage) 338 exit(EXIT_FAILURE); 339 340 exit(EXIT_SUCCESS); 341 } 342 343 /* 344 * osnoise_top_parse_args - allocs, parse and fill the cmd line parameters 345 */ 346 struct osnoise_top_params *osnoise_top_parse_args(int argc, char **argv) 347 { 348 struct osnoise_top_params *params; 349 struct trace_events *tevent; 350 int retval; 351 int c; 352 353 params = calloc(1, sizeof(*params)); 354 if (!params) 355 exit(1); 356 357 if (strcmp(argv[0], "hwnoise") == 0) { 358 params->mode = MODE_HWNOISE; 359 /* 360 * Reduce CPU usage for 75% to avoid killing the system. 361 */ 362 params->runtime = 750000; 363 params->period = 1000000; 364 } 365 366 while (1) { 367 static struct option long_options[] = { 368 {"auto", required_argument, 0, 'a'}, 369 {"cpus", required_argument, 0, 'c'}, 370 {"cgroup", optional_argument, 0, 'C'}, 371 {"debug", no_argument, 0, 'D'}, 372 {"duration", required_argument, 0, 'd'}, 373 {"event", required_argument, 0, 'e'}, 374 {"house-keeping", required_argument, 0, 'H'}, 375 {"help", no_argument, 0, 'h'}, 376 {"period", required_argument, 0, 'p'}, 377 {"priority", required_argument, 0, 'P'}, 378 {"quiet", no_argument, 0, 'q'}, 379 {"runtime", required_argument, 0, 'r'}, 380 {"stop", required_argument, 0, 's'}, 381 {"stop-total", required_argument, 0, 'S'}, 382 {"threshold", required_argument, 0, 'T'}, 383 {"trace", optional_argument, 0, 't'}, 384 {"trigger", required_argument, 0, '0'}, 385 {"filter", required_argument, 0, '1'}, 386 {"warm-up", required_argument, 0, '2'}, 387 {0, 0, 0, 0} 388 }; 389 390 /* getopt_long stores the option index here. */ 391 int option_index = 0; 392 393 c = getopt_long(argc, argv, "a:c:C::d:De:hH:p:P:qr:s:S:t::T:0:1:2:", 394 long_options, &option_index); 395 396 /* Detect the end of the options. */ 397 if (c == -1) 398 break; 399 400 switch (c) { 401 case 'a': 402 /* set sample stop to auto_thresh */ 403 params->stop_us = get_llong_from_str(optarg); 404 405 /* set sample threshold to 1 */ 406 params->threshold = 1; 407 408 /* set trace */ 409 params->trace_output = "osnoise_trace.txt"; 410 411 break; 412 case 'c': 413 retval = parse_cpu_set(optarg, ¶ms->monitored_cpus); 414 if (retval) 415 osnoise_top_usage(params, "\nInvalid -c cpu list\n"); 416 params->cpus = optarg; 417 break; 418 case 'C': 419 params->cgroup = 1; 420 if (!optarg) { 421 /* will inherit this cgroup */ 422 params->cgroup_name = NULL; 423 } else if (*optarg == '=') { 424 /* skip the = */ 425 params->cgroup_name = ++optarg; 426 } 427 break; 428 case 'D': 429 config_debug = 1; 430 break; 431 case 'd': 432 params->duration = parse_seconds_duration(optarg); 433 if (!params->duration) 434 osnoise_top_usage(params, "Invalid -D duration\n"); 435 break; 436 case 'e': 437 tevent = trace_event_alloc(optarg); 438 if (!tevent) { 439 err_msg("Error alloc trace event"); 440 exit(EXIT_FAILURE); 441 } 442 443 if (params->events) 444 tevent->next = params->events; 445 params->events = tevent; 446 447 break; 448 case 'h': 449 case '?': 450 osnoise_top_usage(params, NULL); 451 break; 452 case 'H': 453 params->hk_cpus = 1; 454 retval = parse_cpu_set(optarg, ¶ms->hk_cpu_set); 455 if (retval) { 456 err_msg("Error parsing house keeping CPUs\n"); 457 exit(EXIT_FAILURE); 458 } 459 break; 460 case 'p': 461 params->period = get_llong_from_str(optarg); 462 if (params->period > 10000000) 463 osnoise_top_usage(params, "Period longer than 10 s\n"); 464 break; 465 case 'P': 466 retval = parse_prio(optarg, ¶ms->sched_param); 467 if (retval == -1) 468 osnoise_top_usage(params, "Invalid -P priority"); 469 params->set_sched = 1; 470 break; 471 case 'q': 472 params->quiet = 1; 473 break; 474 case 'r': 475 params->runtime = get_llong_from_str(optarg); 476 if (params->runtime < 100) 477 osnoise_top_usage(params, "Runtime shorter than 100 us\n"); 478 break; 479 case 's': 480 params->stop_us = get_llong_from_str(optarg); 481 break; 482 case 'S': 483 params->stop_total_us = get_llong_from_str(optarg); 484 break; 485 case 't': 486 if (optarg) 487 /* skip = */ 488 params->trace_output = &optarg[1]; 489 else 490 params->trace_output = "osnoise_trace.txt"; 491 break; 492 case 'T': 493 params->threshold = get_llong_from_str(optarg); 494 break; 495 case '0': /* trigger */ 496 if (params->events) { 497 retval = trace_event_add_trigger(params->events, optarg); 498 if (retval) { 499 err_msg("Error adding trigger %s\n", optarg); 500 exit(EXIT_FAILURE); 501 } 502 } else { 503 osnoise_top_usage(params, "--trigger requires a previous -e\n"); 504 } 505 break; 506 case '1': /* filter */ 507 if (params->events) { 508 retval = trace_event_add_filter(params->events, optarg); 509 if (retval) { 510 err_msg("Error adding filter %s\n", optarg); 511 exit(EXIT_FAILURE); 512 } 513 } else { 514 osnoise_top_usage(params, "--filter requires a previous -e\n"); 515 } 516 break; 517 case '2': 518 params->warmup = get_llong_from_str(optarg); 519 break; 520 default: 521 osnoise_top_usage(params, "Invalid option"); 522 } 523 } 524 525 if (geteuid()) { 526 err_msg("osnoise needs root permission\n"); 527 exit(EXIT_FAILURE); 528 } 529 530 return params; 531 } 532 533 /* 534 * osnoise_top_apply_config - apply the top configs to the initialized tool 535 */ 536 static int 537 osnoise_top_apply_config(struct osnoise_tool *tool, struct osnoise_top_params *params) 538 { 539 int retval; 540 541 if (!params->sleep_time) 542 params->sleep_time = 1; 543 544 if (params->cpus) { 545 retval = osnoise_set_cpus(tool->context, params->cpus); 546 if (retval) { 547 err_msg("Failed to apply CPUs config\n"); 548 goto out_err; 549 } 550 } 551 552 if (params->runtime || params->period) { 553 retval = osnoise_set_runtime_period(tool->context, 554 params->runtime, 555 params->period); 556 if (retval) { 557 err_msg("Failed to set runtime and/or period\n"); 558 goto out_err; 559 } 560 } 561 562 if (params->stop_us) { 563 retval = osnoise_set_stop_us(tool->context, params->stop_us); 564 if (retval) { 565 err_msg("Failed to set stop us\n"); 566 goto out_err; 567 } 568 } 569 570 if (params->stop_total_us) { 571 retval = osnoise_set_stop_total_us(tool->context, params->stop_total_us); 572 if (retval) { 573 err_msg("Failed to set stop total us\n"); 574 goto out_err; 575 } 576 } 577 578 if (params->threshold) { 579 retval = osnoise_set_tracing_thresh(tool->context, params->threshold); 580 if (retval) { 581 err_msg("Failed to set tracing_thresh\n"); 582 goto out_err; 583 } 584 } 585 586 if (params->mode == MODE_HWNOISE) { 587 retval = osnoise_set_irq_disable(tool->context, 1); 588 if (retval) { 589 err_msg("Failed to set OSNOISE_IRQ_DISABLE option\n"); 590 goto out_err; 591 } 592 } 593 594 if (params->hk_cpus) { 595 retval = sched_setaffinity(getpid(), sizeof(params->hk_cpu_set), 596 ¶ms->hk_cpu_set); 597 if (retval == -1) { 598 err_msg("Failed to set rtla to the house keeping CPUs\n"); 599 goto out_err; 600 } 601 } else if (params->cpus) { 602 /* 603 * Even if the user do not set a house-keeping CPU, try to 604 * move rtla to a CPU set different to the one where the user 605 * set the workload to run. 606 * 607 * No need to check results as this is an automatic attempt. 608 */ 609 auto_house_keeping(¶ms->monitored_cpus); 610 } 611 612 return 0; 613 614 out_err: 615 return -1; 616 } 617 618 /* 619 * osnoise_init_top - initialize a osnoise top tool with parameters 620 */ 621 struct osnoise_tool *osnoise_init_top(struct osnoise_top_params *params) 622 { 623 struct osnoise_tool *tool; 624 int nr_cpus; 625 626 nr_cpus = sysconf(_SC_NPROCESSORS_CONF); 627 628 tool = osnoise_init_tool("osnoise_top"); 629 if (!tool) 630 return NULL; 631 632 tool->data = osnoise_alloc_top(nr_cpus); 633 if (!tool->data) 634 goto out_err; 635 636 tool->params = params; 637 638 tep_register_event_handler(tool->trace.tep, -1, "ftrace", "osnoise", 639 osnoise_top_handler, NULL); 640 641 return tool; 642 643 out_err: 644 osnoise_free_top(tool->data); 645 osnoise_destroy_tool(tool); 646 return NULL; 647 } 648 649 static int stop_tracing; 650 static void stop_top(int sig) 651 { 652 stop_tracing = 1; 653 } 654 655 /* 656 * osnoise_top_set_signals - handles the signal to stop the tool 657 */ 658 static void osnoise_top_set_signals(struct osnoise_top_params *params) 659 { 660 signal(SIGINT, stop_top); 661 if (params->duration) { 662 signal(SIGALRM, stop_top); 663 alarm(params->duration); 664 } 665 } 666 667 int osnoise_top_main(int argc, char **argv) 668 { 669 struct osnoise_top_params *params; 670 struct osnoise_tool *record = NULL; 671 struct osnoise_tool *tool = NULL; 672 struct trace_instance *trace; 673 int return_value = 1; 674 int retval; 675 676 params = osnoise_top_parse_args(argc, argv); 677 if (!params) 678 exit(1); 679 680 tool = osnoise_init_top(params); 681 if (!tool) { 682 err_msg("Could not init osnoise top\n"); 683 goto out_exit; 684 } 685 686 retval = osnoise_top_apply_config(tool, params); 687 if (retval) { 688 err_msg("Could not apply config\n"); 689 goto out_free; 690 } 691 692 trace = &tool->trace; 693 694 retval = enable_osnoise(trace); 695 if (retval) { 696 err_msg("Failed to enable osnoise tracer\n"); 697 goto out_free; 698 } 699 700 if (params->set_sched) { 701 retval = set_comm_sched_attr("osnoise/", ¶ms->sched_param); 702 if (retval) { 703 err_msg("Failed to set sched parameters\n"); 704 goto out_free; 705 } 706 } 707 708 if (params->cgroup) { 709 retval = set_comm_cgroup("osnoise/", params->cgroup_name); 710 if (!retval) { 711 err_msg("Failed to move threads to cgroup\n"); 712 goto out_free; 713 } 714 } 715 716 if (params->trace_output) { 717 record = osnoise_init_trace_tool("osnoise"); 718 if (!record) { 719 err_msg("Failed to enable the trace instance\n"); 720 goto out_free; 721 } 722 723 if (params->events) { 724 retval = trace_events_enable(&record->trace, params->events); 725 if (retval) 726 goto out_top; 727 } 728 } 729 730 /* 731 * Start the tracer here, after having set all instances. 732 * 733 * Let the trace instance start first for the case of hitting a stop 734 * tracing while enabling other instances. The trace instance is the 735 * one with most valuable information. 736 */ 737 if (params->trace_output) 738 trace_instance_start(&record->trace); 739 trace_instance_start(trace); 740 741 if (params->warmup > 0) { 742 debug_msg("Warming up for %d seconds\n", params->warmup); 743 sleep(params->warmup); 744 if (stop_tracing) 745 goto out_top; 746 747 /* 748 * Clean up the buffer. The osnoise workload do not run 749 * with tracing off to avoid creating a performance penalty 750 * when not needed. 751 */ 752 retval = tracefs_instance_file_write(trace->inst, "trace", ""); 753 if (retval < 0) { 754 debug_msg("Error cleaning up the buffer"); 755 goto out_top; 756 } 757 758 } 759 760 tool->start_time = time(NULL); 761 osnoise_top_set_signals(params); 762 763 while (!stop_tracing) { 764 sleep(params->sleep_time); 765 766 retval = tracefs_iterate_raw_events(trace->tep, 767 trace->inst, 768 NULL, 769 0, 770 collect_registered_events, 771 trace); 772 if (retval < 0) { 773 err_msg("Error iterating on events\n"); 774 goto out_top; 775 } 776 777 if (!params->quiet) 778 osnoise_print_stats(params, tool); 779 780 if (trace_is_off(&tool->trace, &record->trace)) 781 break; 782 783 } 784 785 osnoise_print_stats(params, tool); 786 787 return_value = 0; 788 789 if (trace_is_off(&tool->trace, &record->trace)) { 790 printf("osnoise hit stop tracing\n"); 791 if (params->trace_output) { 792 printf(" Saving trace to %s\n", params->trace_output); 793 save_trace_to_file(record->trace.inst, params->trace_output); 794 } 795 } 796 797 out_top: 798 trace_events_destroy(&record->trace, params->events); 799 params->events = NULL; 800 out_free: 801 osnoise_free_top(tool->data); 802 osnoise_destroy_tool(record); 803 osnoise_destroy_tool(tool); 804 free(params); 805 out_exit: 806 exit(return_value); 807 } 808