1 #include "builtin.h" 2 #include "perf.h" 3 4 #include "util/evsel.h" 5 #include "util/evlist.h" 6 #include "util/util.h" 7 #include "util/cache.h" 8 #include "util/symbol.h" 9 #include "util/thread.h" 10 #include "util/header.h" 11 #include "util/session.h" 12 #include "util/intlist.h" 13 #include "util/parse-options.h" 14 #include "util/trace-event.h" 15 #include "util/debug.h" 16 #include <api/fs/debugfs.h> 17 #include "util/tool.h" 18 #include "util/stat.h" 19 #include "util/top.h" 20 #include "util/data.h" 21 #include "util/ordered-events.h" 22 23 #include <sys/prctl.h> 24 #ifdef HAVE_TIMERFD_SUPPORT 25 #include <sys/timerfd.h> 26 #endif 27 28 #include <termios.h> 29 #include <semaphore.h> 30 #include <pthread.h> 31 #include <math.h> 32 33 #ifdef HAVE_KVM_STAT_SUPPORT 34 #include <asm/kvm_perf.h> 35 #include "util/kvm-stat.h" 36 37 void exit_event_get_key(struct perf_evsel *evsel, 38 struct perf_sample *sample, 39 struct event_key *key) 40 { 41 key->info = 0; 42 key->key = perf_evsel__intval(evsel, sample, KVM_EXIT_REASON); 43 } 44 45 bool kvm_exit_event(struct perf_evsel *evsel) 46 { 47 return !strcmp(evsel->name, KVM_EXIT_TRACE); 48 } 49 50 bool exit_event_begin(struct perf_evsel *evsel, 51 struct perf_sample *sample, struct event_key *key) 52 { 53 if (kvm_exit_event(evsel)) { 54 exit_event_get_key(evsel, sample, key); 55 return true; 56 } 57 58 return false; 59 } 60 61 bool kvm_entry_event(struct perf_evsel *evsel) 62 { 63 return !strcmp(evsel->name, KVM_ENTRY_TRACE); 64 } 65 66 bool exit_event_end(struct perf_evsel *evsel, 67 struct perf_sample *sample __maybe_unused, 68 struct event_key *key __maybe_unused) 69 { 70 return kvm_entry_event(evsel); 71 } 72 73 static const char *get_exit_reason(struct perf_kvm_stat *kvm, 74 struct exit_reasons_table *tbl, 75 u64 exit_code) 76 { 77 while (tbl->reason != NULL) { 78 if (tbl->exit_code == exit_code) 79 return tbl->reason; 80 tbl++; 81 } 82 83 pr_err("unknown kvm exit code:%lld on %s\n", 84 (unsigned long long)exit_code, kvm->exit_reasons_isa); 85 return "UNKNOWN"; 86 } 87 88 void exit_event_decode_key(struct perf_kvm_stat *kvm, 89 struct event_key *key, 90 char *decode) 91 { 92 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons, 93 key->key); 94 95 scnprintf(decode, DECODE_STR_LEN, "%s", exit_reason); 96 } 97 98 static bool register_kvm_events_ops(struct perf_kvm_stat *kvm) 99 { 100 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops; 101 102 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) { 103 if (!strcmp(events_ops->name, kvm->report_event)) { 104 kvm->events_ops = events_ops->ops; 105 return true; 106 } 107 } 108 109 return false; 110 } 111 112 struct vcpu_event_record { 113 int vcpu_id; 114 u64 start_time; 115 struct kvm_event *last_event; 116 }; 117 118 119 static void init_kvm_event_record(struct perf_kvm_stat *kvm) 120 { 121 unsigned int i; 122 123 for (i = 0; i < EVENTS_CACHE_SIZE; i++) 124 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]); 125 } 126 127 #ifdef HAVE_TIMERFD_SUPPORT 128 static void clear_events_cache_stats(struct list_head *kvm_events_cache) 129 { 130 struct list_head *head; 131 struct kvm_event *event; 132 unsigned int i; 133 int j; 134 135 for (i = 0; i < EVENTS_CACHE_SIZE; i++) { 136 head = &kvm_events_cache[i]; 137 list_for_each_entry(event, head, hash_entry) { 138 /* reset stats for event */ 139 event->total.time = 0; 140 init_stats(&event->total.stats); 141 142 for (j = 0; j < event->max_vcpu; ++j) { 143 event->vcpu[j].time = 0; 144 init_stats(&event->vcpu[j].stats); 145 } 146 } 147 } 148 } 149 #endif 150 151 static int kvm_events_hash_fn(u64 key) 152 { 153 return key & (EVENTS_CACHE_SIZE - 1); 154 } 155 156 static bool kvm_event_expand(struct kvm_event *event, int vcpu_id) 157 { 158 int old_max_vcpu = event->max_vcpu; 159 void *prev; 160 161 if (vcpu_id < event->max_vcpu) 162 return true; 163 164 while (event->max_vcpu <= vcpu_id) 165 event->max_vcpu += DEFAULT_VCPU_NUM; 166 167 prev = event->vcpu; 168 event->vcpu = realloc(event->vcpu, 169 event->max_vcpu * sizeof(*event->vcpu)); 170 if (!event->vcpu) { 171 free(prev); 172 pr_err("Not enough memory\n"); 173 return false; 174 } 175 176 memset(event->vcpu + old_max_vcpu, 0, 177 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu)); 178 return true; 179 } 180 181 static struct kvm_event *kvm_alloc_init_event(struct event_key *key) 182 { 183 struct kvm_event *event; 184 185 event = zalloc(sizeof(*event)); 186 if (!event) { 187 pr_err("Not enough memory\n"); 188 return NULL; 189 } 190 191 event->key = *key; 192 init_stats(&event->total.stats); 193 return event; 194 } 195 196 static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm, 197 struct event_key *key) 198 { 199 struct kvm_event *event; 200 struct list_head *head; 201 202 BUG_ON(key->key == INVALID_KEY); 203 204 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)]; 205 list_for_each_entry(event, head, hash_entry) { 206 if (event->key.key == key->key && event->key.info == key->info) 207 return event; 208 } 209 210 event = kvm_alloc_init_event(key); 211 if (!event) 212 return NULL; 213 214 list_add(&event->hash_entry, head); 215 return event; 216 } 217 218 static bool handle_begin_event(struct perf_kvm_stat *kvm, 219 struct vcpu_event_record *vcpu_record, 220 struct event_key *key, u64 timestamp) 221 { 222 struct kvm_event *event = NULL; 223 224 if (key->key != INVALID_KEY) 225 event = find_create_kvm_event(kvm, key); 226 227 vcpu_record->last_event = event; 228 vcpu_record->start_time = timestamp; 229 return true; 230 } 231 232 static void 233 kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff) 234 { 235 kvm_stats->time += time_diff; 236 update_stats(&kvm_stats->stats, time_diff); 237 } 238 239 static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event) 240 { 241 struct kvm_event_stats *kvm_stats = &event->total; 242 243 if (vcpu_id != -1) 244 kvm_stats = &event->vcpu[vcpu_id]; 245 246 return rel_stddev_stats(stddev_stats(&kvm_stats->stats), 247 avg_stats(&kvm_stats->stats)); 248 } 249 250 static bool update_kvm_event(struct kvm_event *event, int vcpu_id, 251 u64 time_diff) 252 { 253 if (vcpu_id == -1) { 254 kvm_update_event_stats(&event->total, time_diff); 255 return true; 256 } 257 258 if (!kvm_event_expand(event, vcpu_id)) 259 return false; 260 261 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff); 262 return true; 263 } 264 265 static bool is_child_event(struct perf_kvm_stat *kvm, 266 struct perf_evsel *evsel, 267 struct perf_sample *sample, 268 struct event_key *key) 269 { 270 struct child_event_ops *child_ops; 271 272 child_ops = kvm->events_ops->child_ops; 273 274 if (!child_ops) 275 return false; 276 277 for (; child_ops->name; child_ops++) { 278 if (!strcmp(evsel->name, child_ops->name)) { 279 child_ops->get_key(evsel, sample, key); 280 return true; 281 } 282 } 283 284 return false; 285 } 286 287 static bool handle_child_event(struct perf_kvm_stat *kvm, 288 struct vcpu_event_record *vcpu_record, 289 struct event_key *key, 290 struct perf_sample *sample __maybe_unused) 291 { 292 struct kvm_event *event = NULL; 293 294 if (key->key != INVALID_KEY) 295 event = find_create_kvm_event(kvm, key); 296 297 vcpu_record->last_event = event; 298 299 return true; 300 } 301 302 static bool skip_event(const char *event) 303 { 304 const char * const *skip_events; 305 306 for (skip_events = kvm_skip_events; *skip_events; skip_events++) 307 if (!strcmp(event, *skip_events)) 308 return true; 309 310 return false; 311 } 312 313 static bool handle_end_event(struct perf_kvm_stat *kvm, 314 struct vcpu_event_record *vcpu_record, 315 struct event_key *key, 316 struct perf_sample *sample) 317 { 318 struct kvm_event *event; 319 u64 time_begin, time_diff; 320 int vcpu; 321 322 if (kvm->trace_vcpu == -1) 323 vcpu = -1; 324 else 325 vcpu = vcpu_record->vcpu_id; 326 327 event = vcpu_record->last_event; 328 time_begin = vcpu_record->start_time; 329 330 /* The begin event is not caught. */ 331 if (!time_begin) 332 return true; 333 334 /* 335 * In some case, the 'begin event' only records the start timestamp, 336 * the actual event is recognized in the 'end event' (e.g. mmio-event). 337 */ 338 339 /* Both begin and end events did not get the key. */ 340 if (!event && key->key == INVALID_KEY) 341 return true; 342 343 if (!event) 344 event = find_create_kvm_event(kvm, key); 345 346 if (!event) 347 return false; 348 349 vcpu_record->last_event = NULL; 350 vcpu_record->start_time = 0; 351 352 /* seems to happen once in a while during live mode */ 353 if (sample->time < time_begin) { 354 pr_debug("End time before begin time; skipping event.\n"); 355 return true; 356 } 357 358 time_diff = sample->time - time_begin; 359 360 if (kvm->duration && time_diff > kvm->duration) { 361 char decode[DECODE_STR_LEN]; 362 363 kvm->events_ops->decode_key(kvm, &event->key, decode); 364 if (!skip_event(decode)) { 365 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n", 366 sample->time, sample->pid, vcpu_record->vcpu_id, 367 decode, time_diff/1000); 368 } 369 } 370 371 return update_kvm_event(event, vcpu, time_diff); 372 } 373 374 static 375 struct vcpu_event_record *per_vcpu_record(struct thread *thread, 376 struct perf_evsel *evsel, 377 struct perf_sample *sample) 378 { 379 /* Only kvm_entry records vcpu id. */ 380 if (!thread__priv(thread) && kvm_entry_event(evsel)) { 381 struct vcpu_event_record *vcpu_record; 382 383 vcpu_record = zalloc(sizeof(*vcpu_record)); 384 if (!vcpu_record) { 385 pr_err("%s: Not enough memory\n", __func__); 386 return NULL; 387 } 388 389 vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample, VCPU_ID); 390 thread__set_priv(thread, vcpu_record); 391 } 392 393 return thread__priv(thread); 394 } 395 396 static bool handle_kvm_event(struct perf_kvm_stat *kvm, 397 struct thread *thread, 398 struct perf_evsel *evsel, 399 struct perf_sample *sample) 400 { 401 struct vcpu_event_record *vcpu_record; 402 struct event_key key = { .key = INVALID_KEY, 403 .exit_reasons = kvm->exit_reasons }; 404 405 vcpu_record = per_vcpu_record(thread, evsel, sample); 406 if (!vcpu_record) 407 return true; 408 409 /* only process events for vcpus user cares about */ 410 if ((kvm->trace_vcpu != -1) && 411 (kvm->trace_vcpu != vcpu_record->vcpu_id)) 412 return true; 413 414 if (kvm->events_ops->is_begin_event(evsel, sample, &key)) 415 return handle_begin_event(kvm, vcpu_record, &key, sample->time); 416 417 if (is_child_event(kvm, evsel, sample, &key)) 418 return handle_child_event(kvm, vcpu_record, &key, sample); 419 420 if (kvm->events_ops->is_end_event(evsel, sample, &key)) 421 return handle_end_event(kvm, vcpu_record, &key, sample); 422 423 return true; 424 } 425 426 #define GET_EVENT_KEY(func, field) \ 427 static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \ 428 { \ 429 if (vcpu == -1) \ 430 return event->total.field; \ 431 \ 432 if (vcpu >= event->max_vcpu) \ 433 return 0; \ 434 \ 435 return event->vcpu[vcpu].field; \ 436 } 437 438 #define COMPARE_EVENT_KEY(func, field) \ 439 GET_EVENT_KEY(func, field) \ 440 static int compare_kvm_event_ ## func(struct kvm_event *one, \ 441 struct kvm_event *two, int vcpu)\ 442 { \ 443 return get_event_ ##func(one, vcpu) > \ 444 get_event_ ##func(two, vcpu); \ 445 } 446 447 GET_EVENT_KEY(time, time); 448 COMPARE_EVENT_KEY(count, stats.n); 449 COMPARE_EVENT_KEY(mean, stats.mean); 450 GET_EVENT_KEY(max, stats.max); 451 GET_EVENT_KEY(min, stats.min); 452 453 #define DEF_SORT_NAME_KEY(name, compare_key) \ 454 { #name, compare_kvm_event_ ## compare_key } 455 456 static struct kvm_event_key keys[] = { 457 DEF_SORT_NAME_KEY(sample, count), 458 DEF_SORT_NAME_KEY(time, mean), 459 { NULL, NULL } 460 }; 461 462 static bool select_key(struct perf_kvm_stat *kvm) 463 { 464 int i; 465 466 for (i = 0; keys[i].name; i++) { 467 if (!strcmp(keys[i].name, kvm->sort_key)) { 468 kvm->compare = keys[i].key; 469 return true; 470 } 471 } 472 473 pr_err("Unknown compare key:%s\n", kvm->sort_key); 474 return false; 475 } 476 477 static void insert_to_result(struct rb_root *result, struct kvm_event *event, 478 key_cmp_fun bigger, int vcpu) 479 { 480 struct rb_node **rb = &result->rb_node; 481 struct rb_node *parent = NULL; 482 struct kvm_event *p; 483 484 while (*rb) { 485 p = container_of(*rb, struct kvm_event, rb); 486 parent = *rb; 487 488 if (bigger(event, p, vcpu)) 489 rb = &(*rb)->rb_left; 490 else 491 rb = &(*rb)->rb_right; 492 } 493 494 rb_link_node(&event->rb, parent, rb); 495 rb_insert_color(&event->rb, result); 496 } 497 498 static void 499 update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event) 500 { 501 int vcpu = kvm->trace_vcpu; 502 503 kvm->total_count += get_event_count(event, vcpu); 504 kvm->total_time += get_event_time(event, vcpu); 505 } 506 507 static bool event_is_valid(struct kvm_event *event, int vcpu) 508 { 509 return !!get_event_count(event, vcpu); 510 } 511 512 static void sort_result(struct perf_kvm_stat *kvm) 513 { 514 unsigned int i; 515 int vcpu = kvm->trace_vcpu; 516 struct kvm_event *event; 517 518 for (i = 0; i < EVENTS_CACHE_SIZE; i++) { 519 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) { 520 if (event_is_valid(event, vcpu)) { 521 update_total_count(kvm, event); 522 insert_to_result(&kvm->result, event, 523 kvm->compare, vcpu); 524 } 525 } 526 } 527 } 528 529 /* returns left most element of result, and erase it */ 530 static struct kvm_event *pop_from_result(struct rb_root *result) 531 { 532 struct rb_node *node = rb_first(result); 533 534 if (!node) 535 return NULL; 536 537 rb_erase(node, result); 538 return container_of(node, struct kvm_event, rb); 539 } 540 541 static void print_vcpu_info(struct perf_kvm_stat *kvm) 542 { 543 int vcpu = kvm->trace_vcpu; 544 545 pr_info("Analyze events for "); 546 547 if (kvm->opts.target.system_wide) 548 pr_info("all VMs, "); 549 else if (kvm->opts.target.pid) 550 pr_info("pid(s) %s, ", kvm->opts.target.pid); 551 else 552 pr_info("dazed and confused on what is monitored, "); 553 554 if (vcpu == -1) 555 pr_info("all VCPUs:\n\n"); 556 else 557 pr_info("VCPU %d:\n\n", vcpu); 558 } 559 560 static void show_timeofday(void) 561 { 562 char date[64]; 563 struct timeval tv; 564 struct tm ltime; 565 566 gettimeofday(&tv, NULL); 567 if (localtime_r(&tv.tv_sec, <ime)) { 568 strftime(date, sizeof(date), "%H:%M:%S", <ime); 569 pr_info("%s.%06ld", date, tv.tv_usec); 570 } else 571 pr_info("00:00:00.000000"); 572 573 return; 574 } 575 576 static void print_result(struct perf_kvm_stat *kvm) 577 { 578 char decode[DECODE_STR_LEN]; 579 struct kvm_event *event; 580 int vcpu = kvm->trace_vcpu; 581 582 if (kvm->live) { 583 puts(CONSOLE_CLEAR); 584 show_timeofday(); 585 } 586 587 pr_info("\n\n"); 588 print_vcpu_info(kvm); 589 pr_info("%*s ", DECODE_STR_LEN, kvm->events_ops->name); 590 pr_info("%10s ", "Samples"); 591 pr_info("%9s ", "Samples%"); 592 593 pr_info("%9s ", "Time%"); 594 pr_info("%11s ", "Min Time"); 595 pr_info("%11s ", "Max Time"); 596 pr_info("%16s ", "Avg time"); 597 pr_info("\n\n"); 598 599 while ((event = pop_from_result(&kvm->result))) { 600 u64 ecount, etime, max, min; 601 602 ecount = get_event_count(event, vcpu); 603 etime = get_event_time(event, vcpu); 604 max = get_event_max(event, vcpu); 605 min = get_event_min(event, vcpu); 606 607 kvm->events_ops->decode_key(kvm, &event->key, decode); 608 pr_info("%*s ", DECODE_STR_LEN, decode); 609 pr_info("%10llu ", (unsigned long long)ecount); 610 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100); 611 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100); 612 pr_info("%9.2fus ", (double)min / 1e3); 613 pr_info("%9.2fus ", (double)max / 1e3); 614 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3, 615 kvm_event_rel_stddev(vcpu, event)); 616 pr_info("\n"); 617 } 618 619 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n", 620 kvm->total_count, kvm->total_time / 1e3); 621 622 if (kvm->lost_events) 623 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events); 624 } 625 626 #ifdef HAVE_TIMERFD_SUPPORT 627 static int process_lost_event(struct perf_tool *tool, 628 union perf_event *event __maybe_unused, 629 struct perf_sample *sample __maybe_unused, 630 struct machine *machine __maybe_unused) 631 { 632 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool); 633 634 kvm->lost_events++; 635 return 0; 636 } 637 #endif 638 639 static bool skip_sample(struct perf_kvm_stat *kvm, 640 struct perf_sample *sample) 641 { 642 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL) 643 return true; 644 645 return false; 646 } 647 648 static int process_sample_event(struct perf_tool *tool, 649 union perf_event *event, 650 struct perf_sample *sample, 651 struct perf_evsel *evsel, 652 struct machine *machine) 653 { 654 int err = 0; 655 struct thread *thread; 656 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, 657 tool); 658 659 if (skip_sample(kvm, sample)) 660 return 0; 661 662 thread = machine__findnew_thread(machine, sample->pid, sample->tid); 663 if (thread == NULL) { 664 pr_debug("problem processing %d event, skipping it.\n", 665 event->header.type); 666 return -1; 667 } 668 669 if (!handle_kvm_event(kvm, thread, evsel, sample)) 670 err = -1; 671 672 thread__put(thread); 673 return err; 674 } 675 676 static int cpu_isa_config(struct perf_kvm_stat *kvm) 677 { 678 char buf[64], *cpuid; 679 int err; 680 681 if (kvm->live) { 682 err = get_cpuid(buf, sizeof(buf)); 683 if (err != 0) { 684 pr_err("Failed to look up CPU type\n"); 685 return err; 686 } 687 cpuid = buf; 688 } else 689 cpuid = kvm->session->header.env.cpuid; 690 691 if (!cpuid) { 692 pr_err("Failed to look up CPU type\n"); 693 return -EINVAL; 694 } 695 696 err = cpu_isa_init(kvm, cpuid); 697 if (err == -ENOTSUP) 698 pr_err("CPU %s is not supported.\n", cpuid); 699 700 return err; 701 } 702 703 static bool verify_vcpu(int vcpu) 704 { 705 if (vcpu != -1 && vcpu < 0) { 706 pr_err("Invalid vcpu:%d.\n", vcpu); 707 return false; 708 } 709 710 return true; 711 } 712 713 #ifdef HAVE_TIMERFD_SUPPORT 714 /* keeping the max events to a modest level to keep 715 * the processing of samples per mmap smooth. 716 */ 717 #define PERF_KVM__MAX_EVENTS_PER_MMAP 25 718 719 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx, 720 u64 *mmap_time) 721 { 722 union perf_event *event; 723 struct perf_sample sample; 724 s64 n = 0; 725 int err; 726 727 *mmap_time = ULLONG_MAX; 728 while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) { 729 err = perf_evlist__parse_sample(kvm->evlist, event, &sample); 730 if (err) { 731 perf_evlist__mmap_consume(kvm->evlist, idx); 732 pr_err("Failed to parse sample\n"); 733 return -1; 734 } 735 736 err = perf_session__queue_event(kvm->session, event, &sample, 0); 737 /* 738 * FIXME: Here we can't consume the event, as perf_session__queue_event will 739 * point to it, and it'll get possibly overwritten by the kernel. 740 */ 741 perf_evlist__mmap_consume(kvm->evlist, idx); 742 743 if (err) { 744 pr_err("Failed to enqueue sample: %d\n", err); 745 return -1; 746 } 747 748 /* save time stamp of our first sample for this mmap */ 749 if (n == 0) 750 *mmap_time = sample.time; 751 752 /* limit events per mmap handled all at once */ 753 n++; 754 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP) 755 break; 756 } 757 758 return n; 759 } 760 761 static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm) 762 { 763 int i, err, throttled = 0; 764 s64 n, ntotal = 0; 765 u64 flush_time = ULLONG_MAX, mmap_time; 766 767 for (i = 0; i < kvm->evlist->nr_mmaps; i++) { 768 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time); 769 if (n < 0) 770 return -1; 771 772 /* flush time is going to be the minimum of all the individual 773 * mmap times. Essentially, we flush all the samples queued up 774 * from the last pass under our minimal start time -- that leaves 775 * a very small race for samples to come in with a lower timestamp. 776 * The ioctl to return the perf_clock timestamp should close the 777 * race entirely. 778 */ 779 if (mmap_time < flush_time) 780 flush_time = mmap_time; 781 782 ntotal += n; 783 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP) 784 throttled = 1; 785 } 786 787 /* flush queue after each round in which we processed events */ 788 if (ntotal) { 789 struct ordered_events *oe = &kvm->session->ordered_events; 790 791 oe->next_flush = flush_time; 792 err = ordered_events__flush(oe, OE_FLUSH__ROUND); 793 if (err) { 794 if (kvm->lost_events) 795 pr_info("\nLost events: %" PRIu64 "\n\n", 796 kvm->lost_events); 797 return err; 798 } 799 } 800 801 return throttled; 802 } 803 804 static volatile int done; 805 806 static void sig_handler(int sig __maybe_unused) 807 { 808 done = 1; 809 } 810 811 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm) 812 { 813 struct itimerspec new_value; 814 int rc = -1; 815 816 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK); 817 if (kvm->timerfd < 0) { 818 pr_err("timerfd_create failed\n"); 819 goto out; 820 } 821 822 new_value.it_value.tv_sec = kvm->display_time; 823 new_value.it_value.tv_nsec = 0; 824 new_value.it_interval.tv_sec = kvm->display_time; 825 new_value.it_interval.tv_nsec = 0; 826 827 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) { 828 pr_err("timerfd_settime failed: %d\n", errno); 829 close(kvm->timerfd); 830 goto out; 831 } 832 833 rc = 0; 834 out: 835 return rc; 836 } 837 838 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm) 839 { 840 uint64_t c; 841 int rc; 842 843 rc = read(kvm->timerfd, &c, sizeof(uint64_t)); 844 if (rc < 0) { 845 if (errno == EAGAIN) 846 return 0; 847 848 pr_err("Failed to read timer fd: %d\n", errno); 849 return -1; 850 } 851 852 if (rc != sizeof(uint64_t)) { 853 pr_err("Error reading timer fd - invalid size returned\n"); 854 return -1; 855 } 856 857 if (c != 1) 858 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1); 859 860 /* update display */ 861 sort_result(kvm); 862 print_result(kvm); 863 864 /* reset counts */ 865 clear_events_cache_stats(kvm->kvm_events_cache); 866 kvm->total_count = 0; 867 kvm->total_time = 0; 868 kvm->lost_events = 0; 869 870 return 0; 871 } 872 873 static int fd_set_nonblock(int fd) 874 { 875 long arg = 0; 876 877 arg = fcntl(fd, F_GETFL); 878 if (arg < 0) { 879 pr_err("Failed to get current flags for fd %d\n", fd); 880 return -1; 881 } 882 883 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) { 884 pr_err("Failed to set non-block option on fd %d\n", fd); 885 return -1; 886 } 887 888 return 0; 889 } 890 891 static int perf_kvm__handle_stdin(void) 892 { 893 int c; 894 895 c = getc(stdin); 896 if (c == 'q') 897 return 1; 898 899 return 0; 900 } 901 902 static int kvm_events_live_report(struct perf_kvm_stat *kvm) 903 { 904 int nr_stdin, ret, err = -EINVAL; 905 struct termios save; 906 907 /* live flag must be set first */ 908 kvm->live = true; 909 910 ret = cpu_isa_config(kvm); 911 if (ret < 0) 912 return ret; 913 914 if (!verify_vcpu(kvm->trace_vcpu) || 915 !select_key(kvm) || 916 !register_kvm_events_ops(kvm)) { 917 goto out; 918 } 919 920 set_term_quiet_input(&save); 921 init_kvm_event_record(kvm); 922 923 signal(SIGINT, sig_handler); 924 signal(SIGTERM, sig_handler); 925 926 /* add timer fd */ 927 if (perf_kvm__timerfd_create(kvm) < 0) { 928 err = -1; 929 goto out; 930 } 931 932 if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0) 933 goto out; 934 935 nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin)); 936 if (nr_stdin < 0) 937 goto out; 938 939 if (fd_set_nonblock(fileno(stdin)) != 0) 940 goto out; 941 942 /* everything is good - enable the events and process */ 943 perf_evlist__enable(kvm->evlist); 944 945 while (!done) { 946 struct fdarray *fda = &kvm->evlist->pollfd; 947 int rc; 948 949 rc = perf_kvm__mmap_read(kvm); 950 if (rc < 0) 951 break; 952 953 err = perf_kvm__handle_timerfd(kvm); 954 if (err) 955 goto out; 956 957 if (fda->entries[nr_stdin].revents & POLLIN) 958 done = perf_kvm__handle_stdin(); 959 960 if (!rc && !done) 961 err = fdarray__poll(fda, 100); 962 } 963 964 perf_evlist__disable(kvm->evlist); 965 966 if (err == 0) { 967 sort_result(kvm); 968 print_result(kvm); 969 } 970 971 out: 972 if (kvm->timerfd >= 0) 973 close(kvm->timerfd); 974 975 tcsetattr(0, TCSAFLUSH, &save); 976 return err; 977 } 978 979 static int kvm_live_open_events(struct perf_kvm_stat *kvm) 980 { 981 int err, rc = -1; 982 struct perf_evsel *pos; 983 struct perf_evlist *evlist = kvm->evlist; 984 char sbuf[STRERR_BUFSIZE]; 985 986 perf_evlist__config(evlist, &kvm->opts); 987 988 /* 989 * Note: exclude_{guest,host} do not apply here. 990 * This command processes KVM tracepoints from host only 991 */ 992 evlist__for_each(evlist, pos) { 993 struct perf_event_attr *attr = &pos->attr; 994 995 /* make sure these *are* set */ 996 perf_evsel__set_sample_bit(pos, TID); 997 perf_evsel__set_sample_bit(pos, TIME); 998 perf_evsel__set_sample_bit(pos, CPU); 999 perf_evsel__set_sample_bit(pos, RAW); 1000 /* make sure these are *not*; want as small a sample as possible */ 1001 perf_evsel__reset_sample_bit(pos, PERIOD); 1002 perf_evsel__reset_sample_bit(pos, IP); 1003 perf_evsel__reset_sample_bit(pos, CALLCHAIN); 1004 perf_evsel__reset_sample_bit(pos, ADDR); 1005 perf_evsel__reset_sample_bit(pos, READ); 1006 attr->mmap = 0; 1007 attr->comm = 0; 1008 attr->task = 0; 1009 1010 attr->sample_period = 1; 1011 1012 attr->watermark = 0; 1013 attr->wakeup_events = 1000; 1014 1015 /* will enable all once we are ready */ 1016 attr->disabled = 1; 1017 } 1018 1019 err = perf_evlist__open(evlist); 1020 if (err < 0) { 1021 printf("Couldn't create the events: %s\n", 1022 strerror_r(errno, sbuf, sizeof(sbuf))); 1023 goto out; 1024 } 1025 1026 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) { 1027 ui__error("Failed to mmap the events: %s\n", 1028 strerror_r(errno, sbuf, sizeof(sbuf))); 1029 perf_evlist__close(evlist); 1030 goto out; 1031 } 1032 1033 rc = 0; 1034 1035 out: 1036 return rc; 1037 } 1038 #endif 1039 1040 static int read_events(struct perf_kvm_stat *kvm) 1041 { 1042 int ret; 1043 1044 struct perf_tool eops = { 1045 .sample = process_sample_event, 1046 .comm = perf_event__process_comm, 1047 .ordered_events = true, 1048 }; 1049 struct perf_data_file file = { 1050 .path = kvm->file_name, 1051 .mode = PERF_DATA_MODE_READ, 1052 .force = kvm->force, 1053 }; 1054 1055 kvm->tool = eops; 1056 kvm->session = perf_session__new(&file, false, &kvm->tool); 1057 if (!kvm->session) { 1058 pr_err("Initializing perf session failed\n"); 1059 return -1; 1060 } 1061 1062 symbol__init(&kvm->session->header.env); 1063 1064 if (!perf_session__has_traces(kvm->session, "kvm record")) { 1065 ret = -EINVAL; 1066 goto out_delete; 1067 } 1068 1069 /* 1070 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not 1071 * traced in the old kernel. 1072 */ 1073 ret = cpu_isa_config(kvm); 1074 if (ret < 0) 1075 goto out_delete; 1076 1077 ret = perf_session__process_events(kvm->session); 1078 1079 out_delete: 1080 perf_session__delete(kvm->session); 1081 return ret; 1082 } 1083 1084 static int parse_target_str(struct perf_kvm_stat *kvm) 1085 { 1086 if (kvm->opts.target.pid) { 1087 kvm->pid_list = intlist__new(kvm->opts.target.pid); 1088 if (kvm->pid_list == NULL) { 1089 pr_err("Error parsing process id string\n"); 1090 return -EINVAL; 1091 } 1092 } 1093 1094 return 0; 1095 } 1096 1097 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm) 1098 { 1099 int ret = -EINVAL; 1100 int vcpu = kvm->trace_vcpu; 1101 1102 if (parse_target_str(kvm) != 0) 1103 goto exit; 1104 1105 if (!verify_vcpu(vcpu)) 1106 goto exit; 1107 1108 if (!select_key(kvm)) 1109 goto exit; 1110 1111 if (!register_kvm_events_ops(kvm)) 1112 goto exit; 1113 1114 init_kvm_event_record(kvm); 1115 setup_pager(); 1116 1117 ret = read_events(kvm); 1118 if (ret) 1119 goto exit; 1120 1121 sort_result(kvm); 1122 print_result(kvm); 1123 1124 exit: 1125 return ret; 1126 } 1127 1128 #define STRDUP_FAIL_EXIT(s) \ 1129 ({ char *_p; \ 1130 _p = strdup(s); \ 1131 if (!_p) \ 1132 return -ENOMEM; \ 1133 _p; \ 1134 }) 1135 1136 static int 1137 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv) 1138 { 1139 unsigned int rec_argc, i, j, events_tp_size; 1140 const char **rec_argv; 1141 const char * const record_args[] = { 1142 "record", 1143 "-R", 1144 "-m", "1024", 1145 "-c", "1", 1146 }; 1147 const char * const kvm_stat_record_usage[] = { 1148 "perf kvm stat record [<options>]", 1149 NULL 1150 }; 1151 const char * const *events_tp; 1152 events_tp_size = 0; 1153 1154 for (events_tp = kvm_events_tp; *events_tp; events_tp++) 1155 events_tp_size++; 1156 1157 rec_argc = ARRAY_SIZE(record_args) + argc + 2 + 1158 2 * events_tp_size; 1159 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1160 1161 if (rec_argv == NULL) 1162 return -ENOMEM; 1163 1164 for (i = 0; i < ARRAY_SIZE(record_args); i++) 1165 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]); 1166 1167 for (j = 0; j < events_tp_size; j++) { 1168 rec_argv[i++] = "-e"; 1169 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]); 1170 } 1171 1172 rec_argv[i++] = STRDUP_FAIL_EXIT("-o"); 1173 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name); 1174 1175 for (j = 1; j < (unsigned int)argc; j++, i++) 1176 rec_argv[i] = argv[j]; 1177 1178 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN); 1179 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN); 1180 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN); 1181 1182 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED); 1183 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED); 1184 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED); 1185 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED); 1186 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED); 1187 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED); 1188 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED); 1189 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED); 1190 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED); 1191 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED); 1192 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED); 1193 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED); 1194 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED); 1195 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED); 1196 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED); 1197 1198 record_usage = kvm_stat_record_usage; 1199 return cmd_record(i, rec_argv, NULL); 1200 } 1201 1202 static int 1203 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv) 1204 { 1205 const struct option kvm_events_report_options[] = { 1206 OPT_STRING(0, "event", &kvm->report_event, "report event", 1207 "event for reporting: vmexit, " 1208 "mmio (x86 only), ioport (x86 only)"), 1209 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu, 1210 "vcpu id to report"), 1211 OPT_STRING('k', "key", &kvm->sort_key, "sort-key", 1212 "key for sorting: sample(sort by samples number)" 1213 " time (sort by avg time)"), 1214 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid", 1215 "analyze events only for given process id(s)"), 1216 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"), 1217 OPT_END() 1218 }; 1219 1220 const char * const kvm_events_report_usage[] = { 1221 "perf kvm stat report [<options>]", 1222 NULL 1223 }; 1224 1225 if (argc) { 1226 argc = parse_options(argc, argv, 1227 kvm_events_report_options, 1228 kvm_events_report_usage, 0); 1229 if (argc) 1230 usage_with_options(kvm_events_report_usage, 1231 kvm_events_report_options); 1232 } 1233 1234 if (!kvm->opts.target.pid) 1235 kvm->opts.target.system_wide = true; 1236 1237 return kvm_events_report_vcpu(kvm); 1238 } 1239 1240 #ifdef HAVE_TIMERFD_SUPPORT 1241 static struct perf_evlist *kvm_live_event_list(void) 1242 { 1243 struct perf_evlist *evlist; 1244 char *tp, *name, *sys; 1245 int err = -1; 1246 const char * const *events_tp; 1247 1248 evlist = perf_evlist__new(); 1249 if (evlist == NULL) 1250 return NULL; 1251 1252 for (events_tp = kvm_events_tp; *events_tp; events_tp++) { 1253 1254 tp = strdup(*events_tp); 1255 if (tp == NULL) 1256 goto out; 1257 1258 /* split tracepoint into subsystem and name */ 1259 sys = tp; 1260 name = strchr(tp, ':'); 1261 if (name == NULL) { 1262 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n", 1263 *events_tp); 1264 free(tp); 1265 goto out; 1266 } 1267 *name = '\0'; 1268 name++; 1269 1270 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) { 1271 pr_err("Failed to add %s tracepoint to the list\n", *events_tp); 1272 free(tp); 1273 goto out; 1274 } 1275 1276 free(tp); 1277 } 1278 1279 err = 0; 1280 1281 out: 1282 if (err) { 1283 perf_evlist__delete(evlist); 1284 evlist = NULL; 1285 } 1286 1287 return evlist; 1288 } 1289 1290 static int kvm_events_live(struct perf_kvm_stat *kvm, 1291 int argc, const char **argv) 1292 { 1293 char errbuf[BUFSIZ]; 1294 int err; 1295 1296 const struct option live_options[] = { 1297 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid", 1298 "record events on existing process id"), 1299 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages", 1300 "number of mmap data pages", 1301 perf_evlist__parse_mmap_pages), 1302 OPT_INCR('v', "verbose", &verbose, 1303 "be more verbose (show counter open errors, etc)"), 1304 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide, 1305 "system-wide collection from all CPUs"), 1306 OPT_UINTEGER('d', "display", &kvm->display_time, 1307 "time in seconds between display updates"), 1308 OPT_STRING(0, "event", &kvm->report_event, "report event", 1309 "event for reporting: " 1310 "vmexit, mmio (x86 only), ioport (x86 only)"), 1311 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu, 1312 "vcpu id to report"), 1313 OPT_STRING('k', "key", &kvm->sort_key, "sort-key", 1314 "key for sorting: sample(sort by samples number)" 1315 " time (sort by avg time)"), 1316 OPT_U64(0, "duration", &kvm->duration, 1317 "show events other than" 1318 " HLT (x86 only) or Wait state (s390 only)" 1319 " that take longer than duration usecs"), 1320 OPT_UINTEGER(0, "proc-map-timeout", &kvm->opts.proc_map_timeout, 1321 "per thread proc mmap processing timeout in ms"), 1322 OPT_END() 1323 }; 1324 const char * const live_usage[] = { 1325 "perf kvm stat live [<options>]", 1326 NULL 1327 }; 1328 struct perf_data_file file = { 1329 .mode = PERF_DATA_MODE_WRITE, 1330 }; 1331 1332 1333 /* event handling */ 1334 kvm->tool.sample = process_sample_event; 1335 kvm->tool.comm = perf_event__process_comm; 1336 kvm->tool.exit = perf_event__process_exit; 1337 kvm->tool.fork = perf_event__process_fork; 1338 kvm->tool.lost = process_lost_event; 1339 kvm->tool.ordered_events = true; 1340 perf_tool__fill_defaults(&kvm->tool); 1341 1342 /* set defaults */ 1343 kvm->display_time = 1; 1344 kvm->opts.user_interval = 1; 1345 kvm->opts.mmap_pages = 512; 1346 kvm->opts.target.uses_mmap = false; 1347 kvm->opts.target.uid_str = NULL; 1348 kvm->opts.target.uid = UINT_MAX; 1349 kvm->opts.proc_map_timeout = 500; 1350 1351 symbol__init(NULL); 1352 disable_buildid_cache(); 1353 1354 use_browser = 0; 1355 setup_browser(false); 1356 1357 if (argc) { 1358 argc = parse_options(argc, argv, live_options, 1359 live_usage, 0); 1360 if (argc) 1361 usage_with_options(live_usage, live_options); 1362 } 1363 1364 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */ 1365 1366 /* 1367 * target related setups 1368 */ 1369 err = target__validate(&kvm->opts.target); 1370 if (err) { 1371 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ); 1372 ui__warning("%s", errbuf); 1373 } 1374 1375 if (target__none(&kvm->opts.target)) 1376 kvm->opts.target.system_wide = true; 1377 1378 1379 /* 1380 * generate the event list 1381 */ 1382 kvm->evlist = kvm_live_event_list(); 1383 if (kvm->evlist == NULL) { 1384 err = -1; 1385 goto out; 1386 } 1387 1388 symbol_conf.nr_events = kvm->evlist->nr_entries; 1389 1390 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0) 1391 usage_with_options(live_usage, live_options); 1392 1393 /* 1394 * perf session 1395 */ 1396 kvm->session = perf_session__new(&file, false, &kvm->tool); 1397 if (kvm->session == NULL) { 1398 err = -1; 1399 goto out; 1400 } 1401 kvm->session->evlist = kvm->evlist; 1402 perf_session__set_id_hdr_size(kvm->session); 1403 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true); 1404 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target, 1405 kvm->evlist->threads, false, kvm->opts.proc_map_timeout); 1406 err = kvm_live_open_events(kvm); 1407 if (err) 1408 goto out; 1409 1410 err = kvm_events_live_report(kvm); 1411 1412 out: 1413 exit_browser(0); 1414 1415 if (kvm->session) 1416 perf_session__delete(kvm->session); 1417 kvm->session = NULL; 1418 if (kvm->evlist) 1419 perf_evlist__delete(kvm->evlist); 1420 1421 return err; 1422 } 1423 #endif 1424 1425 static void print_kvm_stat_usage(void) 1426 { 1427 printf("Usage: perf kvm stat <command>\n\n"); 1428 1429 printf("# Available commands:\n"); 1430 printf("\trecord: record kvm events\n"); 1431 printf("\treport: report statistical data of kvm events\n"); 1432 printf("\tlive: live reporting of statistical data of kvm events\n"); 1433 1434 printf("\nOtherwise, it is the alias of 'perf stat':\n"); 1435 } 1436 1437 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv) 1438 { 1439 struct perf_kvm_stat kvm = { 1440 .file_name = file_name, 1441 1442 .trace_vcpu = -1, 1443 .report_event = "vmexit", 1444 .sort_key = "sample", 1445 1446 }; 1447 1448 if (argc == 1) { 1449 print_kvm_stat_usage(); 1450 goto perf_stat; 1451 } 1452 1453 if (!strncmp(argv[1], "rec", 3)) 1454 return kvm_events_record(&kvm, argc - 1, argv + 1); 1455 1456 if (!strncmp(argv[1], "rep", 3)) 1457 return kvm_events_report(&kvm, argc - 1 , argv + 1); 1458 1459 #ifdef HAVE_TIMERFD_SUPPORT 1460 if (!strncmp(argv[1], "live", 4)) 1461 return kvm_events_live(&kvm, argc - 1 , argv + 1); 1462 #endif 1463 1464 perf_stat: 1465 return cmd_stat(argc, argv, NULL); 1466 } 1467 #endif /* HAVE_KVM_STAT_SUPPORT */ 1468 1469 static int __cmd_record(const char *file_name, int argc, const char **argv) 1470 { 1471 int rec_argc, i = 0, j; 1472 const char **rec_argv; 1473 1474 rec_argc = argc + 2; 1475 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1476 rec_argv[i++] = strdup("record"); 1477 rec_argv[i++] = strdup("-o"); 1478 rec_argv[i++] = strdup(file_name); 1479 for (j = 1; j < argc; j++, i++) 1480 rec_argv[i] = argv[j]; 1481 1482 BUG_ON(i != rec_argc); 1483 1484 return cmd_record(i, rec_argv, NULL); 1485 } 1486 1487 static int __cmd_report(const char *file_name, int argc, const char **argv) 1488 { 1489 int rec_argc, i = 0, j; 1490 const char **rec_argv; 1491 1492 rec_argc = argc + 2; 1493 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1494 rec_argv[i++] = strdup("report"); 1495 rec_argv[i++] = strdup("-i"); 1496 rec_argv[i++] = strdup(file_name); 1497 for (j = 1; j < argc; j++, i++) 1498 rec_argv[i] = argv[j]; 1499 1500 BUG_ON(i != rec_argc); 1501 1502 return cmd_report(i, rec_argv, NULL); 1503 } 1504 1505 static int 1506 __cmd_buildid_list(const char *file_name, int argc, const char **argv) 1507 { 1508 int rec_argc, i = 0, j; 1509 const char **rec_argv; 1510 1511 rec_argc = argc + 2; 1512 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1513 rec_argv[i++] = strdup("buildid-list"); 1514 rec_argv[i++] = strdup("-i"); 1515 rec_argv[i++] = strdup(file_name); 1516 for (j = 1; j < argc; j++, i++) 1517 rec_argv[i] = argv[j]; 1518 1519 BUG_ON(i != rec_argc); 1520 1521 return cmd_buildid_list(i, rec_argv, NULL); 1522 } 1523 1524 int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused) 1525 { 1526 const char *file_name = NULL; 1527 const struct option kvm_options[] = { 1528 OPT_STRING('i', "input", &file_name, "file", 1529 "Input file name"), 1530 OPT_STRING('o', "output", &file_name, "file", 1531 "Output file name"), 1532 OPT_BOOLEAN(0, "guest", &perf_guest, 1533 "Collect guest os data"), 1534 OPT_BOOLEAN(0, "host", &perf_host, 1535 "Collect host os data"), 1536 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory", 1537 "guest mount directory under which every guest os" 1538 " instance has a subdir"), 1539 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name, 1540 "file", "file saving guest os vmlinux"), 1541 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms, 1542 "file", "file saving guest os /proc/kallsyms"), 1543 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules, 1544 "file", "file saving guest os /proc/modules"), 1545 OPT_INCR('v', "verbose", &verbose, 1546 "be more verbose (show counter open errors, etc)"), 1547 OPT_END() 1548 }; 1549 1550 const char *const kvm_subcommands[] = { "top", "record", "report", "diff", 1551 "buildid-list", "stat", NULL }; 1552 const char *kvm_usage[] = { NULL, NULL }; 1553 1554 perf_host = 0; 1555 perf_guest = 1; 1556 1557 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage, 1558 PARSE_OPT_STOP_AT_NON_OPTION); 1559 if (!argc) 1560 usage_with_options(kvm_usage, kvm_options); 1561 1562 if (!perf_host) 1563 perf_guest = 1; 1564 1565 if (!file_name) { 1566 file_name = get_filename_for_perf_kvm(); 1567 1568 if (!file_name) { 1569 pr_err("Failed to allocate memory for filename\n"); 1570 return -ENOMEM; 1571 } 1572 } 1573 1574 if (!strncmp(argv[0], "rec", 3)) 1575 return __cmd_record(file_name, argc, argv); 1576 else if (!strncmp(argv[0], "rep", 3)) 1577 return __cmd_report(file_name, argc, argv); 1578 else if (!strncmp(argv[0], "diff", 4)) 1579 return cmd_diff(argc, argv, NULL); 1580 else if (!strncmp(argv[0], "top", 3)) 1581 return cmd_top(argc, argv, NULL); 1582 else if (!strncmp(argv[0], "buildid-list", 12)) 1583 return __cmd_buildid_list(file_name, argc, argv); 1584 #ifdef HAVE_KVM_STAT_SUPPORT 1585 else if (!strncmp(argv[0], "stat", 4)) 1586 return kvm_cmd_stat(file_name, argc, argv); 1587 #endif 1588 else 1589 usage_with_options(kvm_usage, kvm_options); 1590 1591 return 0; 1592 } 1593