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