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 #include <getopt.h> 7 #include <stdlib.h> 8 #include <string.h> 9 #include <signal.h> 10 #include <unistd.h> 11 #include <stdio.h> 12 #include <time.h> 13 #include <errno.h> 14 15 #include "utils.h" 16 #include "osnoise.h" 17 #include "timerlat.h" 18 #include "timerlat_aa.h" 19 20 struct timerlat_top_params { 21 char *cpus; 22 char *monitored_cpus; 23 char *trace_output; 24 unsigned long long runtime; 25 long long stop_us; 26 long long stop_total_us; 27 long long timerlat_period_us; 28 long long print_stack; 29 int sleep_time; 30 int output_divisor; 31 int duration; 32 int quiet; 33 int set_sched; 34 int dma_latency; 35 int no_aa; 36 int aa_only; 37 int dump_tasks; 38 struct sched_attr sched_param; 39 struct trace_events *events; 40 }; 41 42 struct timerlat_top_cpu { 43 int irq_count; 44 int thread_count; 45 46 unsigned long long cur_irq; 47 unsigned long long min_irq; 48 unsigned long long sum_irq; 49 unsigned long long max_irq; 50 51 unsigned long long cur_thread; 52 unsigned long long min_thread; 53 unsigned long long sum_thread; 54 unsigned long long max_thread; 55 }; 56 57 struct timerlat_top_data { 58 struct timerlat_top_cpu *cpu_data; 59 int nr_cpus; 60 }; 61 62 /* 63 * timerlat_free_top - free runtime data 64 */ 65 static void 66 timerlat_free_top(struct timerlat_top_data *data) 67 { 68 free(data->cpu_data); 69 free(data); 70 } 71 72 /* 73 * timerlat_alloc_histogram - alloc runtime data 74 */ 75 static struct timerlat_top_data *timerlat_alloc_top(int nr_cpus) 76 { 77 struct timerlat_top_data *data; 78 int cpu; 79 80 data = calloc(1, sizeof(*data)); 81 if (!data) 82 return NULL; 83 84 data->nr_cpus = nr_cpus; 85 86 /* one set of histograms per CPU */ 87 data->cpu_data = calloc(1, sizeof(*data->cpu_data) * nr_cpus); 88 if (!data->cpu_data) 89 goto cleanup; 90 91 /* set the min to max */ 92 for (cpu = 0; cpu < nr_cpus; cpu++) { 93 data->cpu_data[cpu].min_irq = ~0; 94 data->cpu_data[cpu].min_thread = ~0; 95 } 96 97 return data; 98 99 cleanup: 100 timerlat_free_top(data); 101 return NULL; 102 } 103 104 /* 105 * timerlat_hist_update - record a new timerlat occurent on cpu, updating data 106 */ 107 static void 108 timerlat_top_update(struct osnoise_tool *tool, int cpu, 109 unsigned long long thread, 110 unsigned long long latency) 111 { 112 struct timerlat_top_data *data = tool->data; 113 struct timerlat_top_cpu *cpu_data = &data->cpu_data[cpu]; 114 115 if (!thread) { 116 cpu_data->irq_count++; 117 cpu_data->cur_irq = latency; 118 update_min(&cpu_data->min_irq, &latency); 119 update_sum(&cpu_data->sum_irq, &latency); 120 update_max(&cpu_data->max_irq, &latency); 121 } else { 122 cpu_data->thread_count++; 123 cpu_data->cur_thread = latency; 124 update_min(&cpu_data->min_thread, &latency); 125 update_sum(&cpu_data->sum_thread, &latency); 126 update_max(&cpu_data->max_thread, &latency); 127 } 128 } 129 130 /* 131 * timerlat_top_handler - this is the handler for timerlat tracer events 132 */ 133 static int 134 timerlat_top_handler(struct trace_seq *s, struct tep_record *record, 135 struct tep_event *event, void *context) 136 { 137 struct trace_instance *trace = context; 138 struct timerlat_top_params *params; 139 unsigned long long latency, thread; 140 struct osnoise_tool *top; 141 int cpu = record->cpu; 142 143 top = container_of(trace, struct osnoise_tool, trace); 144 params = top->params; 145 146 if (!params->aa_only) { 147 tep_get_field_val(s, event, "context", record, &thread, 1); 148 tep_get_field_val(s, event, "timer_latency", record, &latency, 1); 149 150 timerlat_top_update(top, cpu, thread, latency); 151 } 152 153 if (!params->no_aa) 154 timerlat_aa_handler(s, record, event, context); 155 156 return 0; 157 } 158 159 /* 160 * timerlat_top_header - print the header of the tool output 161 */ 162 static void timerlat_top_header(struct osnoise_tool *top) 163 { 164 struct timerlat_top_params *params = top->params; 165 struct trace_seq *s = top->trace.seq; 166 char duration[26]; 167 168 get_duration(top->start_time, duration, sizeof(duration)); 169 170 trace_seq_printf(s, "\033[2;37;40m"); 171 trace_seq_printf(s, " Timer Latency "); 172 trace_seq_printf(s, "\033[0;0;0m"); 173 trace_seq_printf(s, "\n"); 174 175 trace_seq_printf(s, "%-6s | IRQ Timer Latency (%s) | Thread Timer Latency (%s)\n", duration, 176 params->output_divisor == 1 ? "ns" : "us", 177 params->output_divisor == 1 ? "ns" : "us"); 178 179 trace_seq_printf(s, "\033[2;30;47m"); 180 trace_seq_printf(s, "CPU COUNT | cur min avg max | cur min avg max"); 181 trace_seq_printf(s, "\033[0;0;0m"); 182 trace_seq_printf(s, "\n"); 183 } 184 185 /* 186 * timerlat_top_print - prints the output of a given CPU 187 */ 188 static void timerlat_top_print(struct osnoise_tool *top, int cpu) 189 { 190 191 struct timerlat_top_params *params = top->params; 192 struct timerlat_top_data *data = top->data; 193 struct timerlat_top_cpu *cpu_data = &data->cpu_data[cpu]; 194 int divisor = params->output_divisor; 195 struct trace_seq *s = top->trace.seq; 196 197 if (divisor == 0) 198 return; 199 200 /* 201 * Skip if no data is available: is this cpu offline? 202 */ 203 if (!cpu_data->irq_count && !cpu_data->thread_count) 204 return; 205 206 /* 207 * Unless trace is being lost, IRQ counter is always the max. 208 */ 209 trace_seq_printf(s, "%3d #%-9d |", cpu, cpu_data->irq_count); 210 211 if (!cpu_data->irq_count) { 212 trace_seq_printf(s, " - "); 213 trace_seq_printf(s, " - "); 214 trace_seq_printf(s, " - "); 215 trace_seq_printf(s, " - |"); 216 } else { 217 trace_seq_printf(s, "%9llu ", cpu_data->cur_irq / params->output_divisor); 218 trace_seq_printf(s, "%9llu ", cpu_data->min_irq / params->output_divisor); 219 trace_seq_printf(s, "%9llu ", (cpu_data->sum_irq / cpu_data->irq_count) / divisor); 220 trace_seq_printf(s, "%9llu |", cpu_data->max_irq / divisor); 221 } 222 223 if (!cpu_data->thread_count) { 224 trace_seq_printf(s, " - "); 225 trace_seq_printf(s, " - "); 226 trace_seq_printf(s, " - "); 227 trace_seq_printf(s, " -\n"); 228 } else { 229 trace_seq_printf(s, "%9llu ", cpu_data->cur_thread / divisor); 230 trace_seq_printf(s, "%9llu ", cpu_data->min_thread / divisor); 231 trace_seq_printf(s, "%9llu ", 232 (cpu_data->sum_thread / cpu_data->thread_count) / divisor); 233 trace_seq_printf(s, "%9llu\n", cpu_data->max_thread / divisor); 234 } 235 } 236 237 /* 238 * clear_terminal - clears the output terminal 239 */ 240 static void clear_terminal(struct trace_seq *seq) 241 { 242 if (!config_debug) 243 trace_seq_printf(seq, "\033c"); 244 } 245 246 /* 247 * timerlat_print_stats - print data for all cpus 248 */ 249 static void 250 timerlat_print_stats(struct timerlat_top_params *params, struct osnoise_tool *top) 251 { 252 struct trace_instance *trace = &top->trace; 253 static int nr_cpus = -1; 254 int i; 255 256 if (params->aa_only) 257 return; 258 259 if (nr_cpus == -1) 260 nr_cpus = sysconf(_SC_NPROCESSORS_CONF); 261 262 if (!params->quiet) 263 clear_terminal(trace->seq); 264 265 timerlat_top_header(top); 266 267 for (i = 0; i < nr_cpus; i++) { 268 if (params->cpus && !params->monitored_cpus[i]) 269 continue; 270 timerlat_top_print(top, i); 271 } 272 273 trace_seq_do_printf(trace->seq); 274 trace_seq_reset(trace->seq); 275 } 276 277 /* 278 * timerlat_top_usage - prints timerlat top usage message 279 */ 280 static void timerlat_top_usage(char *usage) 281 { 282 int i; 283 284 static const char *const msg[] = { 285 "", 286 " usage: rtla timerlat [top] [-h] [-q] [-a us] [-d s] [-D] [-n] [-p us] [-i us] [-T us] [-s us] \\", 287 " [[-t[=file]] [-e sys[:event]] [--filter <filter>] [--trigger <trigger>] [-c cpu-list] \\", 288 " [-P priority] [--dma-latency us] [--aa-only us]", 289 "", 290 " -h/--help: print this menu", 291 " -a/--auto: set automatic trace mode, stopping the session if argument in us latency is hit", 292 " --aa-only us: stop if <us> latency is hit, only printing the auto analysis (reduces CPU usage)", 293 " -p/--period us: timerlat period in us", 294 " -i/--irq us: stop trace if the irq latency is higher than the argument in us", 295 " -T/--thread us: stop trace if the thread latency is higher than the argument in us", 296 " -s/--stack us: save the stack trace at the IRQ if a thread latency is higher than the argument in us", 297 " -c/--cpus cpus: run the tracer only on the given cpus", 298 " -d/--duration time[m|h|d]: duration of the session in seconds", 299 " -D/--debug: print debug info", 300 " --dump-tasks: prints the task running on all CPUs if stop conditions are met (depends on !--no-aa)", 301 " -t/--trace[=file]: save the stopped trace to [file|timerlat_trace.txt]", 302 " -e/--event <sys:event>: enable the <sys:event> in the trace instance, multiple -e are allowed", 303 " --filter <command>: enable a trace event filter to the previous -e event", 304 " --trigger <command>: enable a trace event trigger to the previous -e event", 305 " -n/--nano: display data in nanoseconds", 306 " --no-aa: disable auto-analysis, reducing rtla timerlat cpu usage", 307 " -q/--quiet print only a summary at the end", 308 " --dma-latency us: set /dev/cpu_dma_latency latency <us> to reduce exit from idle latency", 309 " -P/--priority o:prio|r:prio|f:prio|d:runtime:period : set scheduling parameters", 310 " o:prio - use SCHED_OTHER with prio", 311 " r:prio - use SCHED_RR with prio", 312 " f:prio - use SCHED_FIFO with prio", 313 " d:runtime[us|ms|s]:period[us|ms|s] - use SCHED_DEADLINE with runtime and period", 314 " in nanoseconds", 315 NULL, 316 }; 317 318 if (usage) 319 fprintf(stderr, "%s\n", usage); 320 321 fprintf(stderr, "rtla timerlat top: a per-cpu summary of the timer latency (version %s)\n", 322 VERSION); 323 324 for (i = 0; msg[i]; i++) 325 fprintf(stderr, "%s\n", msg[i]); 326 exit(1); 327 } 328 329 /* 330 * timerlat_top_parse_args - allocs, parse and fill the cmd line parameters 331 */ 332 static struct timerlat_top_params 333 *timerlat_top_parse_args(int argc, char **argv) 334 { 335 struct timerlat_top_params *params; 336 struct trace_events *tevent; 337 long long auto_thresh; 338 int retval; 339 int c; 340 341 params = calloc(1, sizeof(*params)); 342 if (!params) 343 exit(1); 344 345 /* disabled by default */ 346 params->dma_latency = -1; 347 348 /* display data in microseconds */ 349 params->output_divisor = 1000; 350 351 while (1) { 352 static struct option long_options[] = { 353 {"auto", required_argument, 0, 'a'}, 354 {"cpus", required_argument, 0, 'c'}, 355 {"debug", no_argument, 0, 'D'}, 356 {"duration", required_argument, 0, 'd'}, 357 {"event", required_argument, 0, 'e'}, 358 {"help", no_argument, 0, 'h'}, 359 {"irq", required_argument, 0, 'i'}, 360 {"nano", no_argument, 0, 'n'}, 361 {"period", required_argument, 0, 'p'}, 362 {"priority", required_argument, 0, 'P'}, 363 {"quiet", no_argument, 0, 'q'}, 364 {"stack", required_argument, 0, 's'}, 365 {"thread", required_argument, 0, 'T'}, 366 {"trace", optional_argument, 0, 't'}, 367 {"trigger", required_argument, 0, '0'}, 368 {"filter", required_argument, 0, '1'}, 369 {"dma-latency", required_argument, 0, '2'}, 370 {"no-aa", no_argument, 0, '3'}, 371 {"dump-tasks", no_argument, 0, '4'}, 372 {"aa-only", required_argument, 0, '5'}, 373 {0, 0, 0, 0} 374 }; 375 376 /* getopt_long stores the option index here. */ 377 int option_index = 0; 378 379 c = getopt_long(argc, argv, "a:c:d:De:hi:np:P:qs:t::T:0:1:2:345:", 380 long_options, &option_index); 381 382 /* detect the end of the options. */ 383 if (c == -1) 384 break; 385 386 switch (c) { 387 case 'a': 388 auto_thresh = get_llong_from_str(optarg); 389 390 /* set thread stop to auto_thresh */ 391 params->stop_total_us = auto_thresh; 392 params->stop_us = auto_thresh; 393 394 /* get stack trace */ 395 params->print_stack = auto_thresh; 396 397 /* set trace */ 398 params->trace_output = "timerlat_trace.txt"; 399 break; 400 case '5': 401 /* it is here because it is similar to -a */ 402 auto_thresh = get_llong_from_str(optarg); 403 404 /* set thread stop to auto_thresh */ 405 params->stop_total_us = auto_thresh; 406 params->stop_us = auto_thresh; 407 408 /* get stack trace */ 409 params->print_stack = auto_thresh; 410 411 /* set aa_only to avoid parsing the trace */ 412 params->aa_only = 1; 413 break; 414 case 'c': 415 retval = parse_cpu_list(optarg, ¶ms->monitored_cpus); 416 if (retval) 417 timerlat_top_usage("\nInvalid -c cpu list\n"); 418 params->cpus = optarg; 419 break; 420 case 'D': 421 config_debug = 1; 422 break; 423 case 'd': 424 params->duration = parse_seconds_duration(optarg); 425 if (!params->duration) 426 timerlat_top_usage("Invalid -D duration\n"); 427 break; 428 case 'e': 429 tevent = trace_event_alloc(optarg); 430 if (!tevent) { 431 err_msg("Error alloc trace event"); 432 exit(EXIT_FAILURE); 433 } 434 435 if (params->events) 436 tevent->next = params->events; 437 params->events = tevent; 438 break; 439 case 'h': 440 case '?': 441 timerlat_top_usage(NULL); 442 break; 443 case 'i': 444 params->stop_us = get_llong_from_str(optarg); 445 break; 446 case 'n': 447 params->output_divisor = 1; 448 break; 449 case 'p': 450 params->timerlat_period_us = get_llong_from_str(optarg); 451 if (params->timerlat_period_us > 1000000) 452 timerlat_top_usage("Period longer than 1 s\n"); 453 break; 454 case 'P': 455 retval = parse_prio(optarg, ¶ms->sched_param); 456 if (retval == -1) 457 timerlat_top_usage("Invalid -P priority"); 458 params->set_sched = 1; 459 break; 460 case 'q': 461 params->quiet = 1; 462 break; 463 case 's': 464 params->print_stack = get_llong_from_str(optarg); 465 break; 466 case 'T': 467 params->stop_total_us = get_llong_from_str(optarg); 468 break; 469 case 't': 470 if (optarg) 471 /* skip = */ 472 params->trace_output = &optarg[1]; 473 else 474 params->trace_output = "timerlat_trace.txt"; 475 476 break; 477 case '0': /* trigger */ 478 if (params->events) { 479 retval = trace_event_add_trigger(params->events, optarg); 480 if (retval) { 481 err_msg("Error adding trigger %s\n", optarg); 482 exit(EXIT_FAILURE); 483 } 484 } else { 485 timerlat_top_usage("--trigger requires a previous -e\n"); 486 } 487 break; 488 case '1': /* filter */ 489 if (params->events) { 490 retval = trace_event_add_filter(params->events, optarg); 491 if (retval) { 492 err_msg("Error adding filter %s\n", optarg); 493 exit(EXIT_FAILURE); 494 } 495 } else { 496 timerlat_top_usage("--filter requires a previous -e\n"); 497 } 498 break; 499 case '2': /* dma-latency */ 500 params->dma_latency = get_llong_from_str(optarg); 501 if (params->dma_latency < 0 || params->dma_latency > 10000) { 502 err_msg("--dma-latency needs to be >= 0 and < 10000"); 503 exit(EXIT_FAILURE); 504 } 505 break; 506 case '3': /* no-aa */ 507 params->no_aa = 1; 508 break; 509 case '4': 510 params->dump_tasks = 1; 511 break; 512 default: 513 timerlat_top_usage("Invalid option"); 514 } 515 } 516 517 if (geteuid()) { 518 err_msg("rtla needs root permission\n"); 519 exit(EXIT_FAILURE); 520 } 521 522 /* 523 * Auto analysis only happens if stop tracing, thus: 524 */ 525 if (!params->stop_us && !params->stop_total_us) 526 params->no_aa = 1; 527 528 if (params->no_aa && params->aa_only) 529 timerlat_top_usage("--no-aa and --aa-only are mutually exclusive!"); 530 531 return params; 532 } 533 534 /* 535 * timerlat_top_apply_config - apply the top configs to the initialized tool 536 */ 537 static int 538 timerlat_top_apply_config(struct osnoise_tool *top, struct timerlat_top_params *params) 539 { 540 int retval; 541 542 if (!params->sleep_time) 543 params->sleep_time = 1; 544 545 if (params->cpus) { 546 retval = osnoise_set_cpus(top->context, params->cpus); 547 if (retval) { 548 err_msg("Failed to apply CPUs config\n"); 549 goto out_err; 550 } 551 } 552 553 if (params->stop_us) { 554 retval = osnoise_set_stop_us(top->context, params->stop_us); 555 if (retval) { 556 err_msg("Failed to set stop us\n"); 557 goto out_err; 558 } 559 } 560 561 if (params->stop_total_us) { 562 retval = osnoise_set_stop_total_us(top->context, params->stop_total_us); 563 if (retval) { 564 err_msg("Failed to set stop total us\n"); 565 goto out_err; 566 } 567 } 568 569 570 if (params->timerlat_period_us) { 571 retval = osnoise_set_timerlat_period_us(top->context, params->timerlat_period_us); 572 if (retval) { 573 err_msg("Failed to set timerlat period\n"); 574 goto out_err; 575 } 576 } 577 578 579 if (params->print_stack) { 580 retval = osnoise_set_print_stack(top->context, params->print_stack); 581 if (retval) { 582 err_msg("Failed to set print stack\n"); 583 goto out_err; 584 } 585 } 586 587 return 0; 588 589 out_err: 590 return -1; 591 } 592 593 /* 594 * timerlat_init_top - initialize a timerlat top tool with parameters 595 */ 596 static struct osnoise_tool 597 *timerlat_init_top(struct timerlat_top_params *params) 598 { 599 struct osnoise_tool *top; 600 int nr_cpus; 601 int retval; 602 603 nr_cpus = sysconf(_SC_NPROCESSORS_CONF); 604 605 top = osnoise_init_tool("timerlat_top"); 606 if (!top) 607 return NULL; 608 609 top->data = timerlat_alloc_top(nr_cpus); 610 if (!top->data) 611 goto out_err; 612 613 top->params = params; 614 615 tep_register_event_handler(top->trace.tep, -1, "ftrace", "timerlat", 616 timerlat_top_handler, top); 617 618 /* 619 * If no auto analysis, we are ready. 620 */ 621 if (params->no_aa) 622 return top; 623 624 retval = timerlat_aa_init(top, nr_cpus, params->dump_tasks); 625 if (retval) 626 goto out_err; 627 628 return top; 629 630 out_err: 631 osnoise_destroy_tool(top); 632 return NULL; 633 } 634 635 static int stop_tracing; 636 static void stop_top(int sig) 637 { 638 stop_tracing = 1; 639 } 640 641 /* 642 * timerlat_top_set_signals - handles the signal to stop the tool 643 */ 644 static void 645 timerlat_top_set_signals(struct timerlat_top_params *params) 646 { 647 signal(SIGINT, stop_top); 648 if (params->duration) { 649 signal(SIGALRM, stop_top); 650 alarm(params->duration); 651 } 652 } 653 654 int timerlat_top_main(int argc, char *argv[]) 655 { 656 struct timerlat_top_params *params; 657 struct osnoise_tool *record = NULL; 658 struct osnoise_tool *top = NULL; 659 struct trace_instance *trace; 660 int dma_latency_fd = -1; 661 int return_value = 1; 662 char *max_lat; 663 int retval; 664 665 params = timerlat_top_parse_args(argc, argv); 666 if (!params) 667 exit(1); 668 669 top = timerlat_init_top(params); 670 if (!top) { 671 err_msg("Could not init osnoise top\n"); 672 goto out_exit; 673 } 674 675 retval = timerlat_top_apply_config(top, params); 676 if (retval) { 677 err_msg("Could not apply config\n"); 678 goto out_free; 679 } 680 681 trace = &top->trace; 682 683 retval = enable_timerlat(trace); 684 if (retval) { 685 err_msg("Failed to enable timerlat tracer\n"); 686 goto out_free; 687 } 688 689 if (params->set_sched) { 690 retval = set_comm_sched_attr("timerlat/", ¶ms->sched_param); 691 if (retval) { 692 err_msg("Failed to set sched parameters\n"); 693 goto out_free; 694 } 695 } 696 697 if (params->dma_latency >= 0) { 698 dma_latency_fd = set_cpu_dma_latency(params->dma_latency); 699 if (dma_latency_fd < 0) { 700 err_msg("Could not set /dev/cpu_dma_latency.\n"); 701 goto out_free; 702 } 703 } 704 705 trace_instance_start(trace); 706 707 if (params->trace_output) { 708 record = osnoise_init_trace_tool("timerlat"); 709 if (!record) { 710 err_msg("Failed to enable the trace instance\n"); 711 goto out_free; 712 } 713 714 if (params->events) { 715 retval = trace_events_enable(&record->trace, params->events); 716 if (retval) 717 goto out_top; 718 } 719 720 trace_instance_start(&record->trace); 721 } 722 723 top->start_time = time(NULL); 724 timerlat_top_set_signals(params); 725 726 while (!stop_tracing) { 727 sleep(params->sleep_time); 728 729 if (params->aa_only && !trace_is_off(&top->trace, &record->trace)) 730 continue; 731 732 retval = tracefs_iterate_raw_events(trace->tep, 733 trace->inst, 734 NULL, 735 0, 736 collect_registered_events, 737 trace); 738 if (retval < 0) { 739 err_msg("Error iterating on events\n"); 740 goto out_top; 741 } 742 743 if (!params->quiet) 744 timerlat_print_stats(params, top); 745 746 if (trace_is_off(&top->trace, &record->trace)) 747 break; 748 749 } 750 751 timerlat_print_stats(params, top); 752 753 return_value = 0; 754 755 if (trace_is_off(&top->trace, &record->trace)) { 756 printf("rtla timerlat hit stop tracing\n"); 757 758 if (!params->no_aa) 759 timerlat_auto_analysis(params->stop_us, params->stop_total_us); 760 761 if (params->trace_output) { 762 printf(" Saving trace to %s\n", params->trace_output); 763 save_trace_to_file(record->trace.inst, params->trace_output); 764 } 765 } else if (params->aa_only) { 766 /* 767 * If the trace did not stop with --aa-only, at least print the 768 * max known latency. 769 */ 770 max_lat = tracefs_instance_file_read(trace->inst, "tracing_max_latency", NULL); 771 if (max_lat) { 772 printf(" Max latency was %s\n", max_lat); 773 free(max_lat); 774 } 775 } 776 777 out_top: 778 if (dma_latency_fd >= 0) 779 close(dma_latency_fd); 780 trace_events_destroy(&record->trace, params->events); 781 params->events = NULL; 782 out_free: 783 timerlat_free_top(top->data); 784 timerlat_aa_destroy(); 785 osnoise_destroy_tool(record); 786 osnoise_destroy_tool(top); 787 free(params); 788 out_exit: 789 exit(return_value); 790 } 791