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 <lk/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 #if defined(__i386__) || defined(__x86_64__) 33 #include <asm/svm.h> 34 #include <asm/vmx.h> 35 #include <asm/kvm.h> 36 37 struct event_key { 38 #define INVALID_KEY (~0ULL) 39 u64 key; 40 int info; 41 }; 42 43 struct kvm_event_stats { 44 u64 time; 45 struct stats stats; 46 }; 47 48 struct kvm_event { 49 struct list_head hash_entry; 50 struct rb_node rb; 51 52 struct event_key key; 53 54 struct kvm_event_stats total; 55 56 #define DEFAULT_VCPU_NUM 8 57 int max_vcpu; 58 struct kvm_event_stats *vcpu; 59 }; 60 61 typedef int (*key_cmp_fun)(struct kvm_event*, struct kvm_event*, int); 62 63 struct kvm_event_key { 64 const char *name; 65 key_cmp_fun key; 66 }; 67 68 69 struct perf_kvm_stat; 70 71 struct kvm_events_ops { 72 bool (*is_begin_event)(struct perf_evsel *evsel, 73 struct perf_sample *sample, 74 struct event_key *key); 75 bool (*is_end_event)(struct perf_evsel *evsel, 76 struct perf_sample *sample, struct event_key *key); 77 void (*decode_key)(struct perf_kvm_stat *kvm, struct event_key *key, 78 char decode[20]); 79 const char *name; 80 }; 81 82 struct exit_reasons_table { 83 unsigned long exit_code; 84 const char *reason; 85 }; 86 87 #define EVENTS_BITS 12 88 #define EVENTS_CACHE_SIZE (1UL << EVENTS_BITS) 89 90 struct perf_kvm_stat { 91 struct perf_tool tool; 92 struct perf_record_opts opts; 93 struct perf_evlist *evlist; 94 struct perf_session *session; 95 96 const char *file_name; 97 const char *report_event; 98 const char *sort_key; 99 int trace_vcpu; 100 101 struct exit_reasons_table *exit_reasons; 102 int exit_reasons_size; 103 const char *exit_reasons_isa; 104 105 struct kvm_events_ops *events_ops; 106 key_cmp_fun compare; 107 struct list_head kvm_events_cache[EVENTS_CACHE_SIZE]; 108 109 u64 total_time; 110 u64 total_count; 111 u64 lost_events; 112 u64 duration; 113 114 const char *pid_str; 115 struct intlist *pid_list; 116 117 struct rb_root result; 118 119 int timerfd; 120 unsigned int display_time; 121 bool live; 122 }; 123 124 125 static void exit_event_get_key(struct perf_evsel *evsel, 126 struct perf_sample *sample, 127 struct event_key *key) 128 { 129 key->info = 0; 130 key->key = perf_evsel__intval(evsel, sample, "exit_reason"); 131 } 132 133 static bool kvm_exit_event(struct perf_evsel *evsel) 134 { 135 return !strcmp(evsel->name, "kvm:kvm_exit"); 136 } 137 138 static bool exit_event_begin(struct perf_evsel *evsel, 139 struct perf_sample *sample, struct event_key *key) 140 { 141 if (kvm_exit_event(evsel)) { 142 exit_event_get_key(evsel, sample, key); 143 return true; 144 } 145 146 return false; 147 } 148 149 static bool kvm_entry_event(struct perf_evsel *evsel) 150 { 151 return !strcmp(evsel->name, "kvm:kvm_entry"); 152 } 153 154 static bool exit_event_end(struct perf_evsel *evsel, 155 struct perf_sample *sample __maybe_unused, 156 struct event_key *key __maybe_unused) 157 { 158 return kvm_entry_event(evsel); 159 } 160 161 static struct exit_reasons_table vmx_exit_reasons[] = { 162 VMX_EXIT_REASONS 163 }; 164 165 static struct exit_reasons_table svm_exit_reasons[] = { 166 SVM_EXIT_REASONS 167 }; 168 169 static const char *get_exit_reason(struct perf_kvm_stat *kvm, u64 exit_code) 170 { 171 int i = kvm->exit_reasons_size; 172 struct exit_reasons_table *tbl = kvm->exit_reasons; 173 174 while (i--) { 175 if (tbl->exit_code == exit_code) 176 return tbl->reason; 177 tbl++; 178 } 179 180 pr_err("unknown kvm exit code:%lld on %s\n", 181 (unsigned long long)exit_code, kvm->exit_reasons_isa); 182 return "UNKNOWN"; 183 } 184 185 static void exit_event_decode_key(struct perf_kvm_stat *kvm, 186 struct event_key *key, 187 char decode[20]) 188 { 189 const char *exit_reason = get_exit_reason(kvm, key->key); 190 191 scnprintf(decode, 20, "%s", exit_reason); 192 } 193 194 static struct kvm_events_ops exit_events = { 195 .is_begin_event = exit_event_begin, 196 .is_end_event = exit_event_end, 197 .decode_key = exit_event_decode_key, 198 .name = "VM-EXIT" 199 }; 200 201 /* 202 * For the mmio events, we treat: 203 * the time of MMIO write: kvm_mmio(KVM_TRACE_MMIO_WRITE...) -> kvm_entry 204 * the time of MMIO read: kvm_exit -> kvm_mmio(KVM_TRACE_MMIO_READ...). 205 */ 206 static void mmio_event_get_key(struct perf_evsel *evsel, struct perf_sample *sample, 207 struct event_key *key) 208 { 209 key->key = perf_evsel__intval(evsel, sample, "gpa"); 210 key->info = perf_evsel__intval(evsel, sample, "type"); 211 } 212 213 #define KVM_TRACE_MMIO_READ_UNSATISFIED 0 214 #define KVM_TRACE_MMIO_READ 1 215 #define KVM_TRACE_MMIO_WRITE 2 216 217 static bool mmio_event_begin(struct perf_evsel *evsel, 218 struct perf_sample *sample, struct event_key *key) 219 { 220 /* MMIO read begin event in kernel. */ 221 if (kvm_exit_event(evsel)) 222 return true; 223 224 /* MMIO write begin event in kernel. */ 225 if (!strcmp(evsel->name, "kvm:kvm_mmio") && 226 perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_WRITE) { 227 mmio_event_get_key(evsel, sample, key); 228 return true; 229 } 230 231 return false; 232 } 233 234 static bool mmio_event_end(struct perf_evsel *evsel, struct perf_sample *sample, 235 struct event_key *key) 236 { 237 /* MMIO write end event in kernel. */ 238 if (kvm_entry_event(evsel)) 239 return true; 240 241 /* MMIO read end event in kernel.*/ 242 if (!strcmp(evsel->name, "kvm:kvm_mmio") && 243 perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_READ) { 244 mmio_event_get_key(evsel, sample, key); 245 return true; 246 } 247 248 return false; 249 } 250 251 static void mmio_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused, 252 struct event_key *key, 253 char decode[20]) 254 { 255 scnprintf(decode, 20, "%#lx:%s", (unsigned long)key->key, 256 key->info == KVM_TRACE_MMIO_WRITE ? "W" : "R"); 257 } 258 259 static struct kvm_events_ops mmio_events = { 260 .is_begin_event = mmio_event_begin, 261 .is_end_event = mmio_event_end, 262 .decode_key = mmio_event_decode_key, 263 .name = "MMIO Access" 264 }; 265 266 /* The time of emulation pio access is from kvm_pio to kvm_entry. */ 267 static void ioport_event_get_key(struct perf_evsel *evsel, 268 struct perf_sample *sample, 269 struct event_key *key) 270 { 271 key->key = perf_evsel__intval(evsel, sample, "port"); 272 key->info = perf_evsel__intval(evsel, sample, "rw"); 273 } 274 275 static bool ioport_event_begin(struct perf_evsel *evsel, 276 struct perf_sample *sample, 277 struct event_key *key) 278 { 279 if (!strcmp(evsel->name, "kvm:kvm_pio")) { 280 ioport_event_get_key(evsel, sample, key); 281 return true; 282 } 283 284 return false; 285 } 286 287 static bool ioport_event_end(struct perf_evsel *evsel, 288 struct perf_sample *sample __maybe_unused, 289 struct event_key *key __maybe_unused) 290 { 291 return kvm_entry_event(evsel); 292 } 293 294 static void ioport_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused, 295 struct event_key *key, 296 char decode[20]) 297 { 298 scnprintf(decode, 20, "%#llx:%s", (unsigned long long)key->key, 299 key->info ? "POUT" : "PIN"); 300 } 301 302 static struct kvm_events_ops ioport_events = { 303 .is_begin_event = ioport_event_begin, 304 .is_end_event = ioport_event_end, 305 .decode_key = ioport_event_decode_key, 306 .name = "IO Port Access" 307 }; 308 309 static bool register_kvm_events_ops(struct perf_kvm_stat *kvm) 310 { 311 bool ret = true; 312 313 if (!strcmp(kvm->report_event, "vmexit")) 314 kvm->events_ops = &exit_events; 315 else if (!strcmp(kvm->report_event, "mmio")) 316 kvm->events_ops = &mmio_events; 317 else if (!strcmp(kvm->report_event, "ioport")) 318 kvm->events_ops = &ioport_events; 319 else { 320 pr_err("Unknown report event:%s\n", kvm->report_event); 321 ret = false; 322 } 323 324 return ret; 325 } 326 327 struct vcpu_event_record { 328 int vcpu_id; 329 u64 start_time; 330 struct kvm_event *last_event; 331 }; 332 333 334 static void init_kvm_event_record(struct perf_kvm_stat *kvm) 335 { 336 unsigned int i; 337 338 for (i = 0; i < EVENTS_CACHE_SIZE; i++) 339 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]); 340 } 341 342 #ifdef HAVE_TIMERFD_SUPPORT 343 static void clear_events_cache_stats(struct list_head *kvm_events_cache) 344 { 345 struct list_head *head; 346 struct kvm_event *event; 347 unsigned int i; 348 int j; 349 350 for (i = 0; i < EVENTS_CACHE_SIZE; i++) { 351 head = &kvm_events_cache[i]; 352 list_for_each_entry(event, head, hash_entry) { 353 /* reset stats for event */ 354 event->total.time = 0; 355 init_stats(&event->total.stats); 356 357 for (j = 0; j < event->max_vcpu; ++j) { 358 event->vcpu[j].time = 0; 359 init_stats(&event->vcpu[j].stats); 360 } 361 } 362 } 363 } 364 #endif 365 366 static int kvm_events_hash_fn(u64 key) 367 { 368 return key & (EVENTS_CACHE_SIZE - 1); 369 } 370 371 static bool kvm_event_expand(struct kvm_event *event, int vcpu_id) 372 { 373 int old_max_vcpu = event->max_vcpu; 374 void *prev; 375 376 if (vcpu_id < event->max_vcpu) 377 return true; 378 379 while (event->max_vcpu <= vcpu_id) 380 event->max_vcpu += DEFAULT_VCPU_NUM; 381 382 prev = event->vcpu; 383 event->vcpu = realloc(event->vcpu, 384 event->max_vcpu * sizeof(*event->vcpu)); 385 if (!event->vcpu) { 386 free(prev); 387 pr_err("Not enough memory\n"); 388 return false; 389 } 390 391 memset(event->vcpu + old_max_vcpu, 0, 392 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu)); 393 return true; 394 } 395 396 static struct kvm_event *kvm_alloc_init_event(struct event_key *key) 397 { 398 struct kvm_event *event; 399 400 event = zalloc(sizeof(*event)); 401 if (!event) { 402 pr_err("Not enough memory\n"); 403 return NULL; 404 } 405 406 event->key = *key; 407 return event; 408 } 409 410 static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm, 411 struct event_key *key) 412 { 413 struct kvm_event *event; 414 struct list_head *head; 415 416 BUG_ON(key->key == INVALID_KEY); 417 418 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)]; 419 list_for_each_entry(event, head, hash_entry) { 420 if (event->key.key == key->key && event->key.info == key->info) 421 return event; 422 } 423 424 event = kvm_alloc_init_event(key); 425 if (!event) 426 return NULL; 427 428 list_add(&event->hash_entry, head); 429 return event; 430 } 431 432 static bool handle_begin_event(struct perf_kvm_stat *kvm, 433 struct vcpu_event_record *vcpu_record, 434 struct event_key *key, u64 timestamp) 435 { 436 struct kvm_event *event = NULL; 437 438 if (key->key != INVALID_KEY) 439 event = find_create_kvm_event(kvm, key); 440 441 vcpu_record->last_event = event; 442 vcpu_record->start_time = timestamp; 443 return true; 444 } 445 446 static void 447 kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff) 448 { 449 kvm_stats->time += time_diff; 450 update_stats(&kvm_stats->stats, time_diff); 451 } 452 453 static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event) 454 { 455 struct kvm_event_stats *kvm_stats = &event->total; 456 457 if (vcpu_id != -1) 458 kvm_stats = &event->vcpu[vcpu_id]; 459 460 return rel_stddev_stats(stddev_stats(&kvm_stats->stats), 461 avg_stats(&kvm_stats->stats)); 462 } 463 464 static bool update_kvm_event(struct kvm_event *event, int vcpu_id, 465 u64 time_diff) 466 { 467 if (vcpu_id == -1) { 468 kvm_update_event_stats(&event->total, time_diff); 469 return true; 470 } 471 472 if (!kvm_event_expand(event, vcpu_id)) 473 return false; 474 475 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff); 476 return true; 477 } 478 479 static bool handle_end_event(struct perf_kvm_stat *kvm, 480 struct vcpu_event_record *vcpu_record, 481 struct event_key *key, 482 struct perf_sample *sample) 483 { 484 struct kvm_event *event; 485 u64 time_begin, time_diff; 486 int vcpu; 487 488 if (kvm->trace_vcpu == -1) 489 vcpu = -1; 490 else 491 vcpu = vcpu_record->vcpu_id; 492 493 event = vcpu_record->last_event; 494 time_begin = vcpu_record->start_time; 495 496 /* The begin event is not caught. */ 497 if (!time_begin) 498 return true; 499 500 /* 501 * In some case, the 'begin event' only records the start timestamp, 502 * the actual event is recognized in the 'end event' (e.g. mmio-event). 503 */ 504 505 /* Both begin and end events did not get the key. */ 506 if (!event && key->key == INVALID_KEY) 507 return true; 508 509 if (!event) 510 event = find_create_kvm_event(kvm, key); 511 512 if (!event) 513 return false; 514 515 vcpu_record->last_event = NULL; 516 vcpu_record->start_time = 0; 517 518 /* seems to happen once in a while during live mode */ 519 if (sample->time < time_begin) { 520 pr_debug("End time before begin time; skipping event.\n"); 521 return true; 522 } 523 524 time_diff = sample->time - time_begin; 525 526 if (kvm->duration && time_diff > kvm->duration) { 527 char decode[32]; 528 529 kvm->events_ops->decode_key(kvm, &event->key, decode); 530 if (strcmp(decode, "HLT")) { 531 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n", 532 sample->time, sample->pid, vcpu_record->vcpu_id, 533 decode, time_diff/1000); 534 } 535 } 536 537 return update_kvm_event(event, vcpu, time_diff); 538 } 539 540 static 541 struct vcpu_event_record *per_vcpu_record(struct thread *thread, 542 struct perf_evsel *evsel, 543 struct perf_sample *sample) 544 { 545 /* Only kvm_entry records vcpu id. */ 546 if (!thread->priv && kvm_entry_event(evsel)) { 547 struct vcpu_event_record *vcpu_record; 548 549 vcpu_record = zalloc(sizeof(*vcpu_record)); 550 if (!vcpu_record) { 551 pr_err("%s: Not enough memory\n", __func__); 552 return NULL; 553 } 554 555 vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample, "vcpu_id"); 556 thread->priv = vcpu_record; 557 } 558 559 return thread->priv; 560 } 561 562 static bool handle_kvm_event(struct perf_kvm_stat *kvm, 563 struct thread *thread, 564 struct perf_evsel *evsel, 565 struct perf_sample *sample) 566 { 567 struct vcpu_event_record *vcpu_record; 568 struct event_key key = {.key = INVALID_KEY}; 569 570 vcpu_record = per_vcpu_record(thread, evsel, sample); 571 if (!vcpu_record) 572 return true; 573 574 /* only process events for vcpus user cares about */ 575 if ((kvm->trace_vcpu != -1) && 576 (kvm->trace_vcpu != vcpu_record->vcpu_id)) 577 return true; 578 579 if (kvm->events_ops->is_begin_event(evsel, sample, &key)) 580 return handle_begin_event(kvm, vcpu_record, &key, sample->time); 581 582 if (kvm->events_ops->is_end_event(evsel, sample, &key)) 583 return handle_end_event(kvm, vcpu_record, &key, sample); 584 585 return true; 586 } 587 588 #define GET_EVENT_KEY(func, field) \ 589 static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \ 590 { \ 591 if (vcpu == -1) \ 592 return event->total.field; \ 593 \ 594 if (vcpu >= event->max_vcpu) \ 595 return 0; \ 596 \ 597 return event->vcpu[vcpu].field; \ 598 } 599 600 #define COMPARE_EVENT_KEY(func, field) \ 601 GET_EVENT_KEY(func, field) \ 602 static int compare_kvm_event_ ## func(struct kvm_event *one, \ 603 struct kvm_event *two, int vcpu)\ 604 { \ 605 return get_event_ ##func(one, vcpu) > \ 606 get_event_ ##func(two, vcpu); \ 607 } 608 609 GET_EVENT_KEY(time, time); 610 COMPARE_EVENT_KEY(count, stats.n); 611 COMPARE_EVENT_KEY(mean, stats.mean); 612 GET_EVENT_KEY(max, stats.max); 613 GET_EVENT_KEY(min, stats.min); 614 615 #define DEF_SORT_NAME_KEY(name, compare_key) \ 616 { #name, compare_kvm_event_ ## compare_key } 617 618 static struct kvm_event_key keys[] = { 619 DEF_SORT_NAME_KEY(sample, count), 620 DEF_SORT_NAME_KEY(time, mean), 621 { NULL, NULL } 622 }; 623 624 static bool select_key(struct perf_kvm_stat *kvm) 625 { 626 int i; 627 628 for (i = 0; keys[i].name; i++) { 629 if (!strcmp(keys[i].name, kvm->sort_key)) { 630 kvm->compare = keys[i].key; 631 return true; 632 } 633 } 634 635 pr_err("Unknown compare key:%s\n", kvm->sort_key); 636 return false; 637 } 638 639 static void insert_to_result(struct rb_root *result, struct kvm_event *event, 640 key_cmp_fun bigger, int vcpu) 641 { 642 struct rb_node **rb = &result->rb_node; 643 struct rb_node *parent = NULL; 644 struct kvm_event *p; 645 646 while (*rb) { 647 p = container_of(*rb, struct kvm_event, rb); 648 parent = *rb; 649 650 if (bigger(event, p, vcpu)) 651 rb = &(*rb)->rb_left; 652 else 653 rb = &(*rb)->rb_right; 654 } 655 656 rb_link_node(&event->rb, parent, rb); 657 rb_insert_color(&event->rb, result); 658 } 659 660 static void 661 update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event) 662 { 663 int vcpu = kvm->trace_vcpu; 664 665 kvm->total_count += get_event_count(event, vcpu); 666 kvm->total_time += get_event_time(event, vcpu); 667 } 668 669 static bool event_is_valid(struct kvm_event *event, int vcpu) 670 { 671 return !!get_event_count(event, vcpu); 672 } 673 674 static void sort_result(struct perf_kvm_stat *kvm) 675 { 676 unsigned int i; 677 int vcpu = kvm->trace_vcpu; 678 struct kvm_event *event; 679 680 for (i = 0; i < EVENTS_CACHE_SIZE; i++) { 681 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) { 682 if (event_is_valid(event, vcpu)) { 683 update_total_count(kvm, event); 684 insert_to_result(&kvm->result, event, 685 kvm->compare, vcpu); 686 } 687 } 688 } 689 } 690 691 /* returns left most element of result, and erase it */ 692 static struct kvm_event *pop_from_result(struct rb_root *result) 693 { 694 struct rb_node *node = rb_first(result); 695 696 if (!node) 697 return NULL; 698 699 rb_erase(node, result); 700 return container_of(node, struct kvm_event, rb); 701 } 702 703 static void print_vcpu_info(struct perf_kvm_stat *kvm) 704 { 705 int vcpu = kvm->trace_vcpu; 706 707 pr_info("Analyze events for "); 708 709 if (kvm->live) { 710 if (kvm->opts.target.system_wide) 711 pr_info("all VMs, "); 712 else if (kvm->opts.target.pid) 713 pr_info("pid(s) %s, ", kvm->opts.target.pid); 714 else 715 pr_info("dazed and confused on what is monitored, "); 716 } 717 718 if (vcpu == -1) 719 pr_info("all VCPUs:\n\n"); 720 else 721 pr_info("VCPU %d:\n\n", vcpu); 722 } 723 724 static void show_timeofday(void) 725 { 726 char date[64]; 727 struct timeval tv; 728 struct tm ltime; 729 730 gettimeofday(&tv, NULL); 731 if (localtime_r(&tv.tv_sec, <ime)) { 732 strftime(date, sizeof(date), "%H:%M:%S", <ime); 733 pr_info("%s.%06ld", date, tv.tv_usec); 734 } else 735 pr_info("00:00:00.000000"); 736 737 return; 738 } 739 740 static void print_result(struct perf_kvm_stat *kvm) 741 { 742 char decode[20]; 743 struct kvm_event *event; 744 int vcpu = kvm->trace_vcpu; 745 746 if (kvm->live) { 747 puts(CONSOLE_CLEAR); 748 show_timeofday(); 749 } 750 751 pr_info("\n\n"); 752 print_vcpu_info(kvm); 753 pr_info("%20s ", kvm->events_ops->name); 754 pr_info("%10s ", "Samples"); 755 pr_info("%9s ", "Samples%"); 756 757 pr_info("%9s ", "Time%"); 758 pr_info("%10s ", "Min Time"); 759 pr_info("%10s ", "Max Time"); 760 pr_info("%16s ", "Avg time"); 761 pr_info("\n\n"); 762 763 while ((event = pop_from_result(&kvm->result))) { 764 u64 ecount, etime, max, min; 765 766 ecount = get_event_count(event, vcpu); 767 etime = get_event_time(event, vcpu); 768 max = get_event_max(event, vcpu); 769 min = get_event_min(event, vcpu); 770 771 kvm->events_ops->decode_key(kvm, &event->key, decode); 772 pr_info("%20s ", decode); 773 pr_info("%10llu ", (unsigned long long)ecount); 774 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100); 775 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100); 776 pr_info("%8" PRIu64 "us ", min / 1000); 777 pr_info("%8" PRIu64 "us ", max / 1000); 778 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3, 779 kvm_event_rel_stddev(vcpu, event)); 780 pr_info("\n"); 781 } 782 783 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n", 784 kvm->total_count, kvm->total_time / 1e3); 785 786 if (kvm->lost_events) 787 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events); 788 } 789 790 #ifdef HAVE_TIMERFD_SUPPORT 791 static int process_lost_event(struct perf_tool *tool, 792 union perf_event *event __maybe_unused, 793 struct perf_sample *sample __maybe_unused, 794 struct machine *machine __maybe_unused) 795 { 796 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool); 797 798 kvm->lost_events++; 799 return 0; 800 } 801 #endif 802 803 static bool skip_sample(struct perf_kvm_stat *kvm, 804 struct perf_sample *sample) 805 { 806 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL) 807 return true; 808 809 return false; 810 } 811 812 static int process_sample_event(struct perf_tool *tool, 813 union perf_event *event, 814 struct perf_sample *sample, 815 struct perf_evsel *evsel, 816 struct machine *machine) 817 { 818 struct thread *thread; 819 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, 820 tool); 821 822 if (skip_sample(kvm, sample)) 823 return 0; 824 825 thread = machine__findnew_thread(machine, sample->pid, sample->tid); 826 if (thread == NULL) { 827 pr_debug("problem processing %d event, skipping it.\n", 828 event->header.type); 829 return -1; 830 } 831 832 if (!handle_kvm_event(kvm, thread, evsel, sample)) 833 return -1; 834 835 return 0; 836 } 837 838 static int cpu_isa_config(struct perf_kvm_stat *kvm) 839 { 840 char buf[64], *cpuid; 841 int err, isa; 842 843 if (kvm->live) { 844 err = get_cpuid(buf, sizeof(buf)); 845 if (err != 0) { 846 pr_err("Failed to look up CPU type (Intel or AMD)\n"); 847 return err; 848 } 849 cpuid = buf; 850 } else 851 cpuid = kvm->session->header.env.cpuid; 852 853 if (strstr(cpuid, "Intel")) 854 isa = 1; 855 else if (strstr(cpuid, "AMD")) 856 isa = 0; 857 else { 858 pr_err("CPU %s is not supported.\n", cpuid); 859 return -ENOTSUP; 860 } 861 862 if (isa == 1) { 863 kvm->exit_reasons = vmx_exit_reasons; 864 kvm->exit_reasons_size = ARRAY_SIZE(vmx_exit_reasons); 865 kvm->exit_reasons_isa = "VMX"; 866 } 867 868 return 0; 869 } 870 871 static bool verify_vcpu(int vcpu) 872 { 873 if (vcpu != -1 && vcpu < 0) { 874 pr_err("Invalid vcpu:%d.\n", vcpu); 875 return false; 876 } 877 878 return true; 879 } 880 881 #ifdef HAVE_TIMERFD_SUPPORT 882 /* keeping the max events to a modest level to keep 883 * the processing of samples per mmap smooth. 884 */ 885 #define PERF_KVM__MAX_EVENTS_PER_MMAP 25 886 887 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx, 888 u64 *mmap_time) 889 { 890 union perf_event *event; 891 struct perf_sample sample; 892 s64 n = 0; 893 int err; 894 895 *mmap_time = ULLONG_MAX; 896 while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) { 897 err = perf_evlist__parse_sample(kvm->evlist, event, &sample); 898 if (err) { 899 perf_evlist__mmap_consume(kvm->evlist, idx); 900 pr_err("Failed to parse sample\n"); 901 return -1; 902 } 903 904 err = perf_session_queue_event(kvm->session, event, &sample, 0); 905 /* 906 * FIXME: Here we can't consume the event, as perf_session_queue_event will 907 * point to it, and it'll get possibly overwritten by the kernel. 908 */ 909 perf_evlist__mmap_consume(kvm->evlist, idx); 910 911 if (err) { 912 pr_err("Failed to enqueue sample: %d\n", err); 913 return -1; 914 } 915 916 /* save time stamp of our first sample for this mmap */ 917 if (n == 0) 918 *mmap_time = sample.time; 919 920 /* limit events per mmap handled all at once */ 921 n++; 922 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP) 923 break; 924 } 925 926 return n; 927 } 928 929 static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm) 930 { 931 int i, err, throttled = 0; 932 s64 n, ntotal = 0; 933 u64 flush_time = ULLONG_MAX, mmap_time; 934 935 for (i = 0; i < kvm->evlist->nr_mmaps; i++) { 936 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time); 937 if (n < 0) 938 return -1; 939 940 /* flush time is going to be the minimum of all the individual 941 * mmap times. Essentially, we flush all the samples queued up 942 * from the last pass under our minimal start time -- that leaves 943 * a very small race for samples to come in with a lower timestamp. 944 * The ioctl to return the perf_clock timestamp should close the 945 * race entirely. 946 */ 947 if (mmap_time < flush_time) 948 flush_time = mmap_time; 949 950 ntotal += n; 951 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP) 952 throttled = 1; 953 } 954 955 /* flush queue after each round in which we processed events */ 956 if (ntotal) { 957 kvm->session->ordered_samples.next_flush = flush_time; 958 err = kvm->tool.finished_round(&kvm->tool, NULL, kvm->session); 959 if (err) { 960 if (kvm->lost_events) 961 pr_info("\nLost events: %" PRIu64 "\n\n", 962 kvm->lost_events); 963 return err; 964 } 965 } 966 967 return throttled; 968 } 969 970 static volatile int done; 971 972 static void sig_handler(int sig __maybe_unused) 973 { 974 done = 1; 975 } 976 977 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm) 978 { 979 struct itimerspec new_value; 980 int rc = -1; 981 982 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK); 983 if (kvm->timerfd < 0) { 984 pr_err("timerfd_create failed\n"); 985 goto out; 986 } 987 988 new_value.it_value.tv_sec = kvm->display_time; 989 new_value.it_value.tv_nsec = 0; 990 new_value.it_interval.tv_sec = kvm->display_time; 991 new_value.it_interval.tv_nsec = 0; 992 993 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) { 994 pr_err("timerfd_settime failed: %d\n", errno); 995 close(kvm->timerfd); 996 goto out; 997 } 998 999 rc = 0; 1000 out: 1001 return rc; 1002 } 1003 1004 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm) 1005 { 1006 uint64_t c; 1007 int rc; 1008 1009 rc = read(kvm->timerfd, &c, sizeof(uint64_t)); 1010 if (rc < 0) { 1011 if (errno == EAGAIN) 1012 return 0; 1013 1014 pr_err("Failed to read timer fd: %d\n", errno); 1015 return -1; 1016 } 1017 1018 if (rc != sizeof(uint64_t)) { 1019 pr_err("Error reading timer fd - invalid size returned\n"); 1020 return -1; 1021 } 1022 1023 if (c != 1) 1024 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1); 1025 1026 /* update display */ 1027 sort_result(kvm); 1028 print_result(kvm); 1029 1030 /* reset counts */ 1031 clear_events_cache_stats(kvm->kvm_events_cache); 1032 kvm->total_count = 0; 1033 kvm->total_time = 0; 1034 kvm->lost_events = 0; 1035 1036 return 0; 1037 } 1038 1039 static int fd_set_nonblock(int fd) 1040 { 1041 long arg = 0; 1042 1043 arg = fcntl(fd, F_GETFL); 1044 if (arg < 0) { 1045 pr_err("Failed to get current flags for fd %d\n", fd); 1046 return -1; 1047 } 1048 1049 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) { 1050 pr_err("Failed to set non-block option on fd %d\n", fd); 1051 return -1; 1052 } 1053 1054 return 0; 1055 } 1056 1057 static 1058 int perf_kvm__handle_stdin(struct termios *tc_now, struct termios *tc_save) 1059 { 1060 int c; 1061 1062 tcsetattr(0, TCSANOW, tc_now); 1063 c = getc(stdin); 1064 tcsetattr(0, TCSAFLUSH, tc_save); 1065 1066 if (c == 'q') 1067 return 1; 1068 1069 return 0; 1070 } 1071 1072 static int kvm_events_live_report(struct perf_kvm_stat *kvm) 1073 { 1074 struct pollfd *pollfds = NULL; 1075 int nr_fds, nr_stdin, ret, err = -EINVAL; 1076 struct termios tc, save; 1077 1078 /* live flag must be set first */ 1079 kvm->live = true; 1080 1081 ret = cpu_isa_config(kvm); 1082 if (ret < 0) 1083 return ret; 1084 1085 if (!verify_vcpu(kvm->trace_vcpu) || 1086 !select_key(kvm) || 1087 !register_kvm_events_ops(kvm)) { 1088 goto out; 1089 } 1090 1091 init_kvm_event_record(kvm); 1092 1093 tcgetattr(0, &save); 1094 tc = save; 1095 tc.c_lflag &= ~(ICANON | ECHO); 1096 tc.c_cc[VMIN] = 0; 1097 tc.c_cc[VTIME] = 0; 1098 1099 signal(SIGINT, sig_handler); 1100 signal(SIGTERM, sig_handler); 1101 1102 /* copy pollfds -- need to add timerfd and stdin */ 1103 nr_fds = kvm->evlist->nr_fds; 1104 pollfds = zalloc(sizeof(struct pollfd) * (nr_fds + 2)); 1105 if (!pollfds) { 1106 err = -ENOMEM; 1107 goto out; 1108 } 1109 memcpy(pollfds, kvm->evlist->pollfd, 1110 sizeof(struct pollfd) * kvm->evlist->nr_fds); 1111 1112 /* add timer fd */ 1113 if (perf_kvm__timerfd_create(kvm) < 0) { 1114 err = -1; 1115 goto out; 1116 } 1117 1118 pollfds[nr_fds].fd = kvm->timerfd; 1119 pollfds[nr_fds].events = POLLIN; 1120 nr_fds++; 1121 1122 pollfds[nr_fds].fd = fileno(stdin); 1123 pollfds[nr_fds].events = POLLIN; 1124 nr_stdin = nr_fds; 1125 nr_fds++; 1126 if (fd_set_nonblock(fileno(stdin)) != 0) 1127 goto out; 1128 1129 /* everything is good - enable the events and process */ 1130 perf_evlist__enable(kvm->evlist); 1131 1132 while (!done) { 1133 int rc; 1134 1135 rc = perf_kvm__mmap_read(kvm); 1136 if (rc < 0) 1137 break; 1138 1139 err = perf_kvm__handle_timerfd(kvm); 1140 if (err) 1141 goto out; 1142 1143 if (pollfds[nr_stdin].revents & POLLIN) 1144 done = perf_kvm__handle_stdin(&tc, &save); 1145 1146 if (!rc && !done) 1147 err = poll(pollfds, nr_fds, 100); 1148 } 1149 1150 perf_evlist__disable(kvm->evlist); 1151 1152 if (err == 0) { 1153 sort_result(kvm); 1154 print_result(kvm); 1155 } 1156 1157 out: 1158 if (kvm->timerfd >= 0) 1159 close(kvm->timerfd); 1160 1161 if (pollfds) 1162 free(pollfds); 1163 1164 return err; 1165 } 1166 1167 static int kvm_live_open_events(struct perf_kvm_stat *kvm) 1168 { 1169 int err, rc = -1; 1170 struct perf_evsel *pos; 1171 struct perf_evlist *evlist = kvm->evlist; 1172 1173 perf_evlist__config(evlist, &kvm->opts); 1174 1175 /* 1176 * Note: exclude_{guest,host} do not apply here. 1177 * This command processes KVM tracepoints from host only 1178 */ 1179 list_for_each_entry(pos, &evlist->entries, node) { 1180 struct perf_event_attr *attr = &pos->attr; 1181 1182 /* make sure these *are* set */ 1183 perf_evsel__set_sample_bit(pos, TID); 1184 perf_evsel__set_sample_bit(pos, TIME); 1185 perf_evsel__set_sample_bit(pos, CPU); 1186 perf_evsel__set_sample_bit(pos, RAW); 1187 /* make sure these are *not*; want as small a sample as possible */ 1188 perf_evsel__reset_sample_bit(pos, PERIOD); 1189 perf_evsel__reset_sample_bit(pos, IP); 1190 perf_evsel__reset_sample_bit(pos, CALLCHAIN); 1191 perf_evsel__reset_sample_bit(pos, ADDR); 1192 perf_evsel__reset_sample_bit(pos, READ); 1193 attr->mmap = 0; 1194 attr->comm = 0; 1195 attr->task = 0; 1196 1197 attr->sample_period = 1; 1198 1199 attr->watermark = 0; 1200 attr->wakeup_events = 1000; 1201 1202 /* will enable all once we are ready */ 1203 attr->disabled = 1; 1204 } 1205 1206 err = perf_evlist__open(evlist); 1207 if (err < 0) { 1208 printf("Couldn't create the events: %s\n", strerror(errno)); 1209 goto out; 1210 } 1211 1212 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) { 1213 ui__error("Failed to mmap the events: %s\n", strerror(errno)); 1214 perf_evlist__close(evlist); 1215 goto out; 1216 } 1217 1218 rc = 0; 1219 1220 out: 1221 return rc; 1222 } 1223 #endif 1224 1225 static int read_events(struct perf_kvm_stat *kvm) 1226 { 1227 int ret; 1228 1229 struct perf_tool eops = { 1230 .sample = process_sample_event, 1231 .comm = perf_event__process_comm, 1232 .ordered_samples = true, 1233 }; 1234 struct perf_data_file file = { 1235 .path = input_name, 1236 .mode = PERF_DATA_MODE_READ, 1237 }; 1238 1239 kvm->tool = eops; 1240 kvm->session = perf_session__new(&file, false, &kvm->tool); 1241 if (!kvm->session) { 1242 pr_err("Initializing perf session failed\n"); 1243 return -EINVAL; 1244 } 1245 1246 if (!perf_session__has_traces(kvm->session, "kvm record")) 1247 return -EINVAL; 1248 1249 /* 1250 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not 1251 * traced in the old kernel. 1252 */ 1253 ret = cpu_isa_config(kvm); 1254 if (ret < 0) 1255 return ret; 1256 1257 return perf_session__process_events(kvm->session, &kvm->tool); 1258 } 1259 1260 static int parse_target_str(struct perf_kvm_stat *kvm) 1261 { 1262 if (kvm->pid_str) { 1263 kvm->pid_list = intlist__new(kvm->pid_str); 1264 if (kvm->pid_list == NULL) { 1265 pr_err("Error parsing process id string\n"); 1266 return -EINVAL; 1267 } 1268 } 1269 1270 return 0; 1271 } 1272 1273 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm) 1274 { 1275 int ret = -EINVAL; 1276 int vcpu = kvm->trace_vcpu; 1277 1278 if (parse_target_str(kvm) != 0) 1279 goto exit; 1280 1281 if (!verify_vcpu(vcpu)) 1282 goto exit; 1283 1284 if (!select_key(kvm)) 1285 goto exit; 1286 1287 if (!register_kvm_events_ops(kvm)) 1288 goto exit; 1289 1290 init_kvm_event_record(kvm); 1291 setup_pager(); 1292 1293 ret = read_events(kvm); 1294 if (ret) 1295 goto exit; 1296 1297 sort_result(kvm); 1298 print_result(kvm); 1299 1300 exit: 1301 return ret; 1302 } 1303 1304 static const char * const kvm_events_tp[] = { 1305 "kvm:kvm_entry", 1306 "kvm:kvm_exit", 1307 "kvm:kvm_mmio", 1308 "kvm:kvm_pio", 1309 }; 1310 1311 #define STRDUP_FAIL_EXIT(s) \ 1312 ({ char *_p; \ 1313 _p = strdup(s); \ 1314 if (!_p) \ 1315 return -ENOMEM; \ 1316 _p; \ 1317 }) 1318 1319 static int 1320 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv) 1321 { 1322 unsigned int rec_argc, i, j; 1323 const char **rec_argv; 1324 const char * const record_args[] = { 1325 "record", 1326 "-R", 1327 "-m", "1024", 1328 "-c", "1", 1329 }; 1330 1331 rec_argc = ARRAY_SIZE(record_args) + argc + 2 + 1332 2 * ARRAY_SIZE(kvm_events_tp); 1333 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1334 1335 if (rec_argv == NULL) 1336 return -ENOMEM; 1337 1338 for (i = 0; i < ARRAY_SIZE(record_args); i++) 1339 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]); 1340 1341 for (j = 0; j < ARRAY_SIZE(kvm_events_tp); j++) { 1342 rec_argv[i++] = "-e"; 1343 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]); 1344 } 1345 1346 rec_argv[i++] = STRDUP_FAIL_EXIT("-o"); 1347 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name); 1348 1349 for (j = 1; j < (unsigned int)argc; j++, i++) 1350 rec_argv[i] = argv[j]; 1351 1352 return cmd_record(i, rec_argv, NULL); 1353 } 1354 1355 static int 1356 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv) 1357 { 1358 const struct option kvm_events_report_options[] = { 1359 OPT_STRING(0, "event", &kvm->report_event, "report event", 1360 "event for reporting: vmexit, mmio, ioport"), 1361 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu, 1362 "vcpu id to report"), 1363 OPT_STRING('k', "key", &kvm->sort_key, "sort-key", 1364 "key for sorting: sample(sort by samples number)" 1365 " time (sort by avg time)"), 1366 OPT_STRING('p', "pid", &kvm->pid_str, "pid", 1367 "analyze events only for given process id(s)"), 1368 OPT_END() 1369 }; 1370 1371 const char * const kvm_events_report_usage[] = { 1372 "perf kvm stat report [<options>]", 1373 NULL 1374 }; 1375 1376 symbol__init(); 1377 1378 if (argc) { 1379 argc = parse_options(argc, argv, 1380 kvm_events_report_options, 1381 kvm_events_report_usage, 0); 1382 if (argc) 1383 usage_with_options(kvm_events_report_usage, 1384 kvm_events_report_options); 1385 } 1386 1387 return kvm_events_report_vcpu(kvm); 1388 } 1389 1390 #ifdef HAVE_TIMERFD_SUPPORT 1391 static struct perf_evlist *kvm_live_event_list(void) 1392 { 1393 struct perf_evlist *evlist; 1394 char *tp, *name, *sys; 1395 unsigned int j; 1396 int err = -1; 1397 1398 evlist = perf_evlist__new(); 1399 if (evlist == NULL) 1400 return NULL; 1401 1402 for (j = 0; j < ARRAY_SIZE(kvm_events_tp); j++) { 1403 1404 tp = strdup(kvm_events_tp[j]); 1405 if (tp == NULL) 1406 goto out; 1407 1408 /* split tracepoint into subsystem and name */ 1409 sys = tp; 1410 name = strchr(tp, ':'); 1411 if (name == NULL) { 1412 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n", 1413 kvm_events_tp[j]); 1414 free(tp); 1415 goto out; 1416 } 1417 *name = '\0'; 1418 name++; 1419 1420 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) { 1421 pr_err("Failed to add %s tracepoint to the list\n", kvm_events_tp[j]); 1422 free(tp); 1423 goto out; 1424 } 1425 1426 free(tp); 1427 } 1428 1429 err = 0; 1430 1431 out: 1432 if (err) { 1433 perf_evlist__delete(evlist); 1434 evlist = NULL; 1435 } 1436 1437 return evlist; 1438 } 1439 1440 static int kvm_events_live(struct perf_kvm_stat *kvm, 1441 int argc, const char **argv) 1442 { 1443 char errbuf[BUFSIZ]; 1444 int err; 1445 1446 const struct option live_options[] = { 1447 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid", 1448 "record events on existing process id"), 1449 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages", 1450 "number of mmap data pages", 1451 perf_evlist__parse_mmap_pages), 1452 OPT_INCR('v', "verbose", &verbose, 1453 "be more verbose (show counter open errors, etc)"), 1454 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide, 1455 "system-wide collection from all CPUs"), 1456 OPT_UINTEGER('d', "display", &kvm->display_time, 1457 "time in seconds between display updates"), 1458 OPT_STRING(0, "event", &kvm->report_event, "report event", 1459 "event for reporting: vmexit, mmio, ioport"), 1460 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu, 1461 "vcpu id to report"), 1462 OPT_STRING('k', "key", &kvm->sort_key, "sort-key", 1463 "key for sorting: sample(sort by samples number)" 1464 " time (sort by avg time)"), 1465 OPT_U64(0, "duration", &kvm->duration, 1466 "show events other than HALT that take longer than duration usecs"), 1467 OPT_END() 1468 }; 1469 const char * const live_usage[] = { 1470 "perf kvm stat live [<options>]", 1471 NULL 1472 }; 1473 struct perf_data_file file = { 1474 .mode = PERF_DATA_MODE_WRITE, 1475 }; 1476 1477 1478 /* event handling */ 1479 kvm->tool.sample = process_sample_event; 1480 kvm->tool.comm = perf_event__process_comm; 1481 kvm->tool.exit = perf_event__process_exit; 1482 kvm->tool.fork = perf_event__process_fork; 1483 kvm->tool.lost = process_lost_event; 1484 kvm->tool.ordered_samples = true; 1485 perf_tool__fill_defaults(&kvm->tool); 1486 1487 /* set defaults */ 1488 kvm->display_time = 1; 1489 kvm->opts.user_interval = 1; 1490 kvm->opts.mmap_pages = 512; 1491 kvm->opts.target.uses_mmap = false; 1492 kvm->opts.target.uid_str = NULL; 1493 kvm->opts.target.uid = UINT_MAX; 1494 1495 symbol__init(); 1496 disable_buildid_cache(); 1497 1498 use_browser = 0; 1499 setup_browser(false); 1500 1501 if (argc) { 1502 argc = parse_options(argc, argv, live_options, 1503 live_usage, 0); 1504 if (argc) 1505 usage_with_options(live_usage, live_options); 1506 } 1507 1508 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */ 1509 1510 /* 1511 * target related setups 1512 */ 1513 err = target__validate(&kvm->opts.target); 1514 if (err) { 1515 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ); 1516 ui__warning("%s", errbuf); 1517 } 1518 1519 if (target__none(&kvm->opts.target)) 1520 kvm->opts.target.system_wide = true; 1521 1522 1523 /* 1524 * generate the event list 1525 */ 1526 kvm->evlist = kvm_live_event_list(); 1527 if (kvm->evlist == NULL) { 1528 err = -1; 1529 goto out; 1530 } 1531 1532 symbol_conf.nr_events = kvm->evlist->nr_entries; 1533 1534 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0) 1535 usage_with_options(live_usage, live_options); 1536 1537 /* 1538 * perf session 1539 */ 1540 kvm->session = perf_session__new(&file, false, &kvm->tool); 1541 if (kvm->session == NULL) { 1542 err = -ENOMEM; 1543 goto out; 1544 } 1545 kvm->session->evlist = kvm->evlist; 1546 perf_session__set_id_hdr_size(kvm->session); 1547 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target, 1548 kvm->evlist->threads, false); 1549 err = kvm_live_open_events(kvm); 1550 if (err) 1551 goto out; 1552 1553 err = kvm_events_live_report(kvm); 1554 1555 out: 1556 exit_browser(0); 1557 1558 if (kvm->session) 1559 perf_session__delete(kvm->session); 1560 kvm->session = NULL; 1561 if (kvm->evlist) { 1562 perf_evlist__delete_maps(kvm->evlist); 1563 perf_evlist__delete(kvm->evlist); 1564 } 1565 1566 return err; 1567 } 1568 #endif 1569 1570 static void print_kvm_stat_usage(void) 1571 { 1572 printf("Usage: perf kvm stat <command>\n\n"); 1573 1574 printf("# Available commands:\n"); 1575 printf("\trecord: record kvm events\n"); 1576 printf("\treport: report statistical data of kvm events\n"); 1577 printf("\tlive: live reporting of statistical data of kvm events\n"); 1578 1579 printf("\nOtherwise, it is the alias of 'perf stat':\n"); 1580 } 1581 1582 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv) 1583 { 1584 struct perf_kvm_stat kvm = { 1585 .file_name = file_name, 1586 1587 .trace_vcpu = -1, 1588 .report_event = "vmexit", 1589 .sort_key = "sample", 1590 1591 .exit_reasons = svm_exit_reasons, 1592 .exit_reasons_size = ARRAY_SIZE(svm_exit_reasons), 1593 .exit_reasons_isa = "SVM", 1594 }; 1595 1596 if (argc == 1) { 1597 print_kvm_stat_usage(); 1598 goto perf_stat; 1599 } 1600 1601 if (!strncmp(argv[1], "rec", 3)) 1602 return kvm_events_record(&kvm, argc - 1, argv + 1); 1603 1604 if (!strncmp(argv[1], "rep", 3)) 1605 return kvm_events_report(&kvm, argc - 1 , argv + 1); 1606 1607 #ifdef HAVE_TIMERFD_SUPPORT 1608 if (!strncmp(argv[1], "live", 4)) 1609 return kvm_events_live(&kvm, argc - 1 , argv + 1); 1610 #endif 1611 1612 perf_stat: 1613 return cmd_stat(argc, argv, NULL); 1614 } 1615 #endif 1616 1617 static int __cmd_record(const char *file_name, int argc, const char **argv) 1618 { 1619 int rec_argc, i = 0, j; 1620 const char **rec_argv; 1621 1622 rec_argc = argc + 2; 1623 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1624 rec_argv[i++] = strdup("record"); 1625 rec_argv[i++] = strdup("-o"); 1626 rec_argv[i++] = strdup(file_name); 1627 for (j = 1; j < argc; j++, i++) 1628 rec_argv[i] = argv[j]; 1629 1630 BUG_ON(i != rec_argc); 1631 1632 return cmd_record(i, rec_argv, NULL); 1633 } 1634 1635 static int __cmd_report(const char *file_name, int argc, const char **argv) 1636 { 1637 int rec_argc, i = 0, j; 1638 const char **rec_argv; 1639 1640 rec_argc = argc + 2; 1641 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1642 rec_argv[i++] = strdup("report"); 1643 rec_argv[i++] = strdup("-i"); 1644 rec_argv[i++] = strdup(file_name); 1645 for (j = 1; j < argc; j++, i++) 1646 rec_argv[i] = argv[j]; 1647 1648 BUG_ON(i != rec_argc); 1649 1650 return cmd_report(i, rec_argv, NULL); 1651 } 1652 1653 static int 1654 __cmd_buildid_list(const char *file_name, int argc, const char **argv) 1655 { 1656 int rec_argc, i = 0, j; 1657 const char **rec_argv; 1658 1659 rec_argc = argc + 2; 1660 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1661 rec_argv[i++] = strdup("buildid-list"); 1662 rec_argv[i++] = strdup("-i"); 1663 rec_argv[i++] = strdup(file_name); 1664 for (j = 1; j < argc; j++, i++) 1665 rec_argv[i] = argv[j]; 1666 1667 BUG_ON(i != rec_argc); 1668 1669 return cmd_buildid_list(i, rec_argv, NULL); 1670 } 1671 1672 int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused) 1673 { 1674 const char *file_name = NULL; 1675 const struct option kvm_options[] = { 1676 OPT_STRING('i', "input", &file_name, "file", 1677 "Input file name"), 1678 OPT_STRING('o', "output", &file_name, "file", 1679 "Output file name"), 1680 OPT_BOOLEAN(0, "guest", &perf_guest, 1681 "Collect guest os data"), 1682 OPT_BOOLEAN(0, "host", &perf_host, 1683 "Collect host os data"), 1684 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory", 1685 "guest mount directory under which every guest os" 1686 " instance has a subdir"), 1687 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name, 1688 "file", "file saving guest os vmlinux"), 1689 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms, 1690 "file", "file saving guest os /proc/kallsyms"), 1691 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules, 1692 "file", "file saving guest os /proc/modules"), 1693 OPT_END() 1694 }; 1695 1696 1697 const char * const kvm_usage[] = { 1698 "perf kvm [<options>] {top|record|report|diff|buildid-list|stat}", 1699 NULL 1700 }; 1701 1702 perf_host = 0; 1703 perf_guest = 1; 1704 1705 argc = parse_options(argc, argv, kvm_options, kvm_usage, 1706 PARSE_OPT_STOP_AT_NON_OPTION); 1707 if (!argc) 1708 usage_with_options(kvm_usage, kvm_options); 1709 1710 if (!perf_host) 1711 perf_guest = 1; 1712 1713 if (!file_name) { 1714 if (perf_host && !perf_guest) 1715 file_name = strdup("perf.data.host"); 1716 else if (!perf_host && perf_guest) 1717 file_name = strdup("perf.data.guest"); 1718 else 1719 file_name = strdup("perf.data.kvm"); 1720 1721 if (!file_name) { 1722 pr_err("Failed to allocate memory for filename\n"); 1723 return -ENOMEM; 1724 } 1725 } 1726 1727 if (!strncmp(argv[0], "rec", 3)) 1728 return __cmd_record(file_name, argc, argv); 1729 else if (!strncmp(argv[0], "rep", 3)) 1730 return __cmd_report(file_name, argc, argv); 1731 else if (!strncmp(argv[0], "diff", 4)) 1732 return cmd_diff(argc, argv, NULL); 1733 else if (!strncmp(argv[0], "top", 3)) 1734 return cmd_top(argc, argv, NULL); 1735 else if (!strncmp(argv[0], "buildid-list", 12)) 1736 return __cmd_buildid_list(file_name, argc, argv); 1737 #if defined(__i386__) || defined(__x86_64__) 1738 else if (!strncmp(argv[0], "stat", 4)) 1739 return kvm_cmd_stat(file_name, argc, argv); 1740 #endif 1741 else 1742 usage_with_options(kvm_usage, kvm_options); 1743 1744 return 0; 1745 } 1746