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 <subcmd/parse-options.h> 14 #include "util/trace-event.h" 15 #include "util/debug.h" 16 #include "util/tool.h" 17 #include "util/stat.h" 18 #include "util/top.h" 19 #include "util/data.h" 20 #include "util/ordered-events.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 "util/kvm-stat.h" 34 35 void exit_event_get_key(struct perf_evsel *evsel, 36 struct perf_sample *sample, 37 struct event_key *key) 38 { 39 key->info = 0; 40 key->key = perf_evsel__intval(evsel, sample, kvm_exit_reason); 41 } 42 43 bool kvm_exit_event(struct perf_evsel *evsel) 44 { 45 return !strcmp(evsel->name, kvm_exit_trace); 46 } 47 48 bool exit_event_begin(struct perf_evsel *evsel, 49 struct perf_sample *sample, struct event_key *key) 50 { 51 if (kvm_exit_event(evsel)) { 52 exit_event_get_key(evsel, sample, key); 53 return true; 54 } 55 56 return false; 57 } 58 59 bool kvm_entry_event(struct perf_evsel *evsel) 60 { 61 return !strcmp(evsel->name, kvm_entry_trace); 62 } 63 64 bool exit_event_end(struct perf_evsel *evsel, 65 struct perf_sample *sample __maybe_unused, 66 struct event_key *key __maybe_unused) 67 { 68 return kvm_entry_event(evsel); 69 } 70 71 static const char *get_exit_reason(struct perf_kvm_stat *kvm, 72 struct exit_reasons_table *tbl, 73 u64 exit_code) 74 { 75 while (tbl->reason != NULL) { 76 if (tbl->exit_code == exit_code) 77 return tbl->reason; 78 tbl++; 79 } 80 81 pr_err("unknown kvm exit code:%lld on %s\n", 82 (unsigned long long)exit_code, kvm->exit_reasons_isa); 83 return "UNKNOWN"; 84 } 85 86 void exit_event_decode_key(struct perf_kvm_stat *kvm, 87 struct event_key *key, 88 char *decode) 89 { 90 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons, 91 key->key); 92 93 scnprintf(decode, decode_str_len, "%s", exit_reason); 94 } 95 96 static bool register_kvm_events_ops(struct perf_kvm_stat *kvm) 97 { 98 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops; 99 100 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) { 101 if (!strcmp(events_ops->name, kvm->report_event)) { 102 kvm->events_ops = events_ops->ops; 103 return true; 104 } 105 } 106 107 return false; 108 } 109 110 struct vcpu_event_record { 111 int vcpu_id; 112 u64 start_time; 113 struct kvm_event *last_event; 114 }; 115 116 117 static void init_kvm_event_record(struct perf_kvm_stat *kvm) 118 { 119 unsigned int i; 120 121 for (i = 0; i < EVENTS_CACHE_SIZE; i++) 122 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]); 123 } 124 125 #ifdef HAVE_TIMERFD_SUPPORT 126 static void clear_events_cache_stats(struct list_head *kvm_events_cache) 127 { 128 struct list_head *head; 129 struct kvm_event *event; 130 unsigned int i; 131 int j; 132 133 for (i = 0; i < EVENTS_CACHE_SIZE; i++) { 134 head = &kvm_events_cache[i]; 135 list_for_each_entry(event, head, hash_entry) { 136 /* reset stats for event */ 137 event->total.time = 0; 138 init_stats(&event->total.stats); 139 140 for (j = 0; j < event->max_vcpu; ++j) { 141 event->vcpu[j].time = 0; 142 init_stats(&event->vcpu[j].stats); 143 } 144 } 145 } 146 } 147 #endif 148 149 static int kvm_events_hash_fn(u64 key) 150 { 151 return key & (EVENTS_CACHE_SIZE - 1); 152 } 153 154 static bool kvm_event_expand(struct kvm_event *event, int vcpu_id) 155 { 156 int old_max_vcpu = event->max_vcpu; 157 void *prev; 158 159 if (vcpu_id < event->max_vcpu) 160 return true; 161 162 while (event->max_vcpu <= vcpu_id) 163 event->max_vcpu += DEFAULT_VCPU_NUM; 164 165 prev = event->vcpu; 166 event->vcpu = realloc(event->vcpu, 167 event->max_vcpu * sizeof(*event->vcpu)); 168 if (!event->vcpu) { 169 free(prev); 170 pr_err("Not enough memory\n"); 171 return false; 172 } 173 174 memset(event->vcpu + old_max_vcpu, 0, 175 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu)); 176 return true; 177 } 178 179 static struct kvm_event *kvm_alloc_init_event(struct event_key *key) 180 { 181 struct kvm_event *event; 182 183 event = zalloc(sizeof(*event)); 184 if (!event) { 185 pr_err("Not enough memory\n"); 186 return NULL; 187 } 188 189 event->key = *key; 190 init_stats(&event->total.stats); 191 return event; 192 } 193 194 static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm, 195 struct event_key *key) 196 { 197 struct kvm_event *event; 198 struct list_head *head; 199 200 BUG_ON(key->key == INVALID_KEY); 201 202 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)]; 203 list_for_each_entry(event, head, hash_entry) { 204 if (event->key.key == key->key && event->key.info == key->info) 205 return event; 206 } 207 208 event = kvm_alloc_init_event(key); 209 if (!event) 210 return NULL; 211 212 list_add(&event->hash_entry, head); 213 return event; 214 } 215 216 static bool handle_begin_event(struct perf_kvm_stat *kvm, 217 struct vcpu_event_record *vcpu_record, 218 struct event_key *key, u64 timestamp) 219 { 220 struct kvm_event *event = NULL; 221 222 if (key->key != INVALID_KEY) 223 event = find_create_kvm_event(kvm, key); 224 225 vcpu_record->last_event = event; 226 vcpu_record->start_time = timestamp; 227 return true; 228 } 229 230 static void 231 kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff) 232 { 233 kvm_stats->time += time_diff; 234 update_stats(&kvm_stats->stats, time_diff); 235 } 236 237 static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event) 238 { 239 struct kvm_event_stats *kvm_stats = &event->total; 240 241 if (vcpu_id != -1) 242 kvm_stats = &event->vcpu[vcpu_id]; 243 244 return rel_stddev_stats(stddev_stats(&kvm_stats->stats), 245 avg_stats(&kvm_stats->stats)); 246 } 247 248 static bool update_kvm_event(struct kvm_event *event, int vcpu_id, 249 u64 time_diff) 250 { 251 if (vcpu_id == -1) { 252 kvm_update_event_stats(&event->total, time_diff); 253 return true; 254 } 255 256 if (!kvm_event_expand(event, vcpu_id)) 257 return false; 258 259 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff); 260 return true; 261 } 262 263 static bool is_child_event(struct perf_kvm_stat *kvm, 264 struct perf_evsel *evsel, 265 struct perf_sample *sample, 266 struct event_key *key) 267 { 268 struct child_event_ops *child_ops; 269 270 child_ops = kvm->events_ops->child_ops; 271 272 if (!child_ops) 273 return false; 274 275 for (; child_ops->name; child_ops++) { 276 if (!strcmp(evsel->name, child_ops->name)) { 277 child_ops->get_key(evsel, sample, key); 278 return true; 279 } 280 } 281 282 return false; 283 } 284 285 static bool handle_child_event(struct perf_kvm_stat *kvm, 286 struct vcpu_event_record *vcpu_record, 287 struct event_key *key, 288 struct perf_sample *sample __maybe_unused) 289 { 290 struct kvm_event *event = NULL; 291 292 if (key->key != INVALID_KEY) 293 event = find_create_kvm_event(kvm, key); 294 295 vcpu_record->last_event = event; 296 297 return true; 298 } 299 300 static bool skip_event(const char *event) 301 { 302 const char * const *skip_events; 303 304 for (skip_events = kvm_skip_events; *skip_events; skip_events++) 305 if (!strcmp(event, *skip_events)) 306 return true; 307 308 return false; 309 } 310 311 static bool handle_end_event(struct perf_kvm_stat *kvm, 312 struct vcpu_event_record *vcpu_record, 313 struct event_key *key, 314 struct perf_sample *sample) 315 { 316 struct kvm_event *event; 317 u64 time_begin, time_diff; 318 int vcpu; 319 320 if (kvm->trace_vcpu == -1) 321 vcpu = -1; 322 else 323 vcpu = vcpu_record->vcpu_id; 324 325 event = vcpu_record->last_event; 326 time_begin = vcpu_record->start_time; 327 328 /* The begin event is not caught. */ 329 if (!time_begin) 330 return true; 331 332 /* 333 * In some case, the 'begin event' only records the start timestamp, 334 * the actual event is recognized in the 'end event' (e.g. mmio-event). 335 */ 336 337 /* Both begin and end events did not get the key. */ 338 if (!event && key->key == INVALID_KEY) 339 return true; 340 341 if (!event) 342 event = find_create_kvm_event(kvm, key); 343 344 if (!event) 345 return false; 346 347 vcpu_record->last_event = NULL; 348 vcpu_record->start_time = 0; 349 350 /* seems to happen once in a while during live mode */ 351 if (sample->time < time_begin) { 352 pr_debug("End time before begin time; skipping event.\n"); 353 return true; 354 } 355 356 time_diff = sample->time - time_begin; 357 358 if (kvm->duration && time_diff > kvm->duration) { 359 char decode[decode_str_len]; 360 361 kvm->events_ops->decode_key(kvm, &event->key, decode); 362 if (!skip_event(decode)) { 363 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n", 364 sample->time, sample->pid, vcpu_record->vcpu_id, 365 decode, time_diff/1000); 366 } 367 } 368 369 return update_kvm_event(event, vcpu, time_diff); 370 } 371 372 static 373 struct vcpu_event_record *per_vcpu_record(struct thread *thread, 374 struct perf_evsel *evsel, 375 struct perf_sample *sample) 376 { 377 /* Only kvm_entry records vcpu id. */ 378 if (!thread__priv(thread) && kvm_entry_event(evsel)) { 379 struct vcpu_event_record *vcpu_record; 380 381 vcpu_record = zalloc(sizeof(*vcpu_record)); 382 if (!vcpu_record) { 383 pr_err("%s: Not enough memory\n", __func__); 384 return NULL; 385 } 386 387 vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample, 388 vcpu_id_str); 389 thread__set_priv(thread, vcpu_record); 390 } 391 392 return thread__priv(thread); 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->opts.target.system_wide) 547 pr_info("all VMs, "); 548 else if (kvm->opts.target.pid) 549 pr_info("pid(s) %s, ", kvm->opts.target.pid); 550 else 551 pr_info("dazed and confused on what is monitored, "); 552 553 if (vcpu == -1) 554 pr_info("all VCPUs:\n\n"); 555 else 556 pr_info("VCPU %d:\n\n", vcpu); 557 } 558 559 static void show_timeofday(void) 560 { 561 char date[64]; 562 struct timeval tv; 563 struct tm ltime; 564 565 gettimeofday(&tv, NULL); 566 if (localtime_r(&tv.tv_sec, <ime)) { 567 strftime(date, sizeof(date), "%H:%M:%S", <ime); 568 pr_info("%s.%06ld", date, tv.tv_usec); 569 } else 570 pr_info("00:00:00.000000"); 571 572 return; 573 } 574 575 static void print_result(struct perf_kvm_stat *kvm) 576 { 577 char decode[decode_str_len]; 578 struct kvm_event *event; 579 int vcpu = kvm->trace_vcpu; 580 581 if (kvm->live) { 582 puts(CONSOLE_CLEAR); 583 show_timeofday(); 584 } 585 586 pr_info("\n\n"); 587 print_vcpu_info(kvm); 588 pr_info("%*s ", decode_str_len, kvm->events_ops->name); 589 pr_info("%10s ", "Samples"); 590 pr_info("%9s ", "Samples%"); 591 592 pr_info("%9s ", "Time%"); 593 pr_info("%11s ", "Min Time"); 594 pr_info("%11s ", "Max Time"); 595 pr_info("%16s ", "Avg time"); 596 pr_info("\n\n"); 597 598 while ((event = pop_from_result(&kvm->result))) { 599 u64 ecount, etime, max, min; 600 601 ecount = get_event_count(event, vcpu); 602 etime = get_event_time(event, vcpu); 603 max = get_event_max(event, vcpu); 604 min = get_event_min(event, vcpu); 605 606 kvm->events_ops->decode_key(kvm, &event->key, decode); 607 pr_info("%*s ", decode_str_len, decode); 608 pr_info("%10llu ", (unsigned long long)ecount); 609 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100); 610 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100); 611 pr_info("%9.2fus ", (double)min / 1e3); 612 pr_info("%9.2fus ", (double)max / 1e3); 613 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3, 614 kvm_event_rel_stddev(vcpu, event)); 615 pr_info("\n"); 616 } 617 618 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n", 619 kvm->total_count, kvm->total_time / 1e3); 620 621 if (kvm->lost_events) 622 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events); 623 } 624 625 #ifdef HAVE_TIMERFD_SUPPORT 626 static int process_lost_event(struct perf_tool *tool, 627 union perf_event *event __maybe_unused, 628 struct perf_sample *sample __maybe_unused, 629 struct machine *machine __maybe_unused) 630 { 631 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool); 632 633 kvm->lost_events++; 634 return 0; 635 } 636 #endif 637 638 static bool skip_sample(struct perf_kvm_stat *kvm, 639 struct perf_sample *sample) 640 { 641 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL) 642 return true; 643 644 return false; 645 } 646 647 static int process_sample_event(struct perf_tool *tool, 648 union perf_event *event, 649 struct perf_sample *sample, 650 struct perf_evsel *evsel, 651 struct machine *machine) 652 { 653 int err = 0; 654 struct thread *thread; 655 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, 656 tool); 657 658 if (skip_sample(kvm, sample)) 659 return 0; 660 661 thread = machine__findnew_thread(machine, sample->pid, sample->tid); 662 if (thread == NULL) { 663 pr_debug("problem processing %d event, skipping it.\n", 664 event->header.type); 665 return -1; 666 } 667 668 if (!handle_kvm_event(kvm, thread, evsel, sample)) 669 err = -1; 670 671 thread__put(thread); 672 return err; 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 struct ordered_events *oe = &kvm->session->ordered_events; 789 790 oe->next_flush = flush_time; 791 err = ordered_events__flush(oe, OE_FLUSH__ROUND); 792 if (err) { 793 if (kvm->lost_events) 794 pr_info("\nLost events: %" PRIu64 "\n\n", 795 kvm->lost_events); 796 return err; 797 } 798 } 799 800 return throttled; 801 } 802 803 static volatile int done; 804 805 static void sig_handler(int sig __maybe_unused) 806 { 807 done = 1; 808 } 809 810 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm) 811 { 812 struct itimerspec new_value; 813 int rc = -1; 814 815 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK); 816 if (kvm->timerfd < 0) { 817 pr_err("timerfd_create failed\n"); 818 goto out; 819 } 820 821 new_value.it_value.tv_sec = kvm->display_time; 822 new_value.it_value.tv_nsec = 0; 823 new_value.it_interval.tv_sec = kvm->display_time; 824 new_value.it_interval.tv_nsec = 0; 825 826 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) { 827 pr_err("timerfd_settime failed: %d\n", errno); 828 close(kvm->timerfd); 829 goto out; 830 } 831 832 rc = 0; 833 out: 834 return rc; 835 } 836 837 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm) 838 { 839 uint64_t c; 840 int rc; 841 842 rc = read(kvm->timerfd, &c, sizeof(uint64_t)); 843 if (rc < 0) { 844 if (errno == EAGAIN) 845 return 0; 846 847 pr_err("Failed to read timer fd: %d\n", errno); 848 return -1; 849 } 850 851 if (rc != sizeof(uint64_t)) { 852 pr_err("Error reading timer fd - invalid size returned\n"); 853 return -1; 854 } 855 856 if (c != 1) 857 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1); 858 859 /* update display */ 860 sort_result(kvm); 861 print_result(kvm); 862 863 /* reset counts */ 864 clear_events_cache_stats(kvm->kvm_events_cache); 865 kvm->total_count = 0; 866 kvm->total_time = 0; 867 kvm->lost_events = 0; 868 869 return 0; 870 } 871 872 static int fd_set_nonblock(int fd) 873 { 874 long arg = 0; 875 876 arg = fcntl(fd, F_GETFL); 877 if (arg < 0) { 878 pr_err("Failed to get current flags for fd %d\n", fd); 879 return -1; 880 } 881 882 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) { 883 pr_err("Failed to set non-block option on fd %d\n", fd); 884 return -1; 885 } 886 887 return 0; 888 } 889 890 static int perf_kvm__handle_stdin(void) 891 { 892 int c; 893 894 c = getc(stdin); 895 if (c == 'q') 896 return 1; 897 898 return 0; 899 } 900 901 static int kvm_events_live_report(struct perf_kvm_stat *kvm) 902 { 903 int nr_stdin, ret, err = -EINVAL; 904 struct termios save; 905 906 /* live flag must be set first */ 907 kvm->live = true; 908 909 ret = cpu_isa_config(kvm); 910 if (ret < 0) 911 return ret; 912 913 if (!verify_vcpu(kvm->trace_vcpu) || 914 !select_key(kvm) || 915 !register_kvm_events_ops(kvm)) { 916 goto out; 917 } 918 919 set_term_quiet_input(&save); 920 init_kvm_event_record(kvm); 921 922 signal(SIGINT, sig_handler); 923 signal(SIGTERM, sig_handler); 924 925 /* add timer fd */ 926 if (perf_kvm__timerfd_create(kvm) < 0) { 927 err = -1; 928 goto out; 929 } 930 931 if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0) 932 goto out; 933 934 nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin)); 935 if (nr_stdin < 0) 936 goto out; 937 938 if (fd_set_nonblock(fileno(stdin)) != 0) 939 goto out; 940 941 /* everything is good - enable the events and process */ 942 perf_evlist__enable(kvm->evlist); 943 944 while (!done) { 945 struct fdarray *fda = &kvm->evlist->pollfd; 946 int rc; 947 948 rc = perf_kvm__mmap_read(kvm); 949 if (rc < 0) 950 break; 951 952 err = perf_kvm__handle_timerfd(kvm); 953 if (err) 954 goto out; 955 956 if (fda->entries[nr_stdin].revents & POLLIN) 957 done = perf_kvm__handle_stdin(); 958 959 if (!rc && !done) 960 err = fdarray__poll(fda, 100); 961 } 962 963 perf_evlist__disable(kvm->evlist); 964 965 if (err == 0) { 966 sort_result(kvm); 967 print_result(kvm); 968 } 969 970 out: 971 if (kvm->timerfd >= 0) 972 close(kvm->timerfd); 973 974 tcsetattr(0, TCSAFLUSH, &save); 975 return err; 976 } 977 978 static int kvm_live_open_events(struct perf_kvm_stat *kvm) 979 { 980 int err, rc = -1; 981 struct perf_evsel *pos; 982 struct perf_evlist *evlist = kvm->evlist; 983 char sbuf[STRERR_BUFSIZE]; 984 985 perf_evlist__config(evlist, &kvm->opts); 986 987 /* 988 * Note: exclude_{guest,host} do not apply here. 989 * This command processes KVM tracepoints from host only 990 */ 991 evlist__for_each(evlist, pos) { 992 struct perf_event_attr *attr = &pos->attr; 993 994 /* make sure these *are* set */ 995 perf_evsel__set_sample_bit(pos, TID); 996 perf_evsel__set_sample_bit(pos, TIME); 997 perf_evsel__set_sample_bit(pos, CPU); 998 perf_evsel__set_sample_bit(pos, RAW); 999 /* make sure these are *not*; want as small a sample as possible */ 1000 perf_evsel__reset_sample_bit(pos, PERIOD); 1001 perf_evsel__reset_sample_bit(pos, IP); 1002 perf_evsel__reset_sample_bit(pos, CALLCHAIN); 1003 perf_evsel__reset_sample_bit(pos, ADDR); 1004 perf_evsel__reset_sample_bit(pos, READ); 1005 attr->mmap = 0; 1006 attr->comm = 0; 1007 attr->task = 0; 1008 1009 attr->sample_period = 1; 1010 1011 attr->watermark = 0; 1012 attr->wakeup_events = 1000; 1013 1014 /* will enable all once we are ready */ 1015 attr->disabled = 1; 1016 } 1017 1018 err = perf_evlist__open(evlist); 1019 if (err < 0) { 1020 printf("Couldn't create the events: %s\n", 1021 strerror_r(errno, sbuf, sizeof(sbuf))); 1022 goto out; 1023 } 1024 1025 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) { 1026 ui__error("Failed to mmap the events: %s\n", 1027 strerror_r(errno, sbuf, sizeof(sbuf))); 1028 perf_evlist__close(evlist); 1029 goto out; 1030 } 1031 1032 rc = 0; 1033 1034 out: 1035 return rc; 1036 } 1037 #endif 1038 1039 static int read_events(struct perf_kvm_stat *kvm) 1040 { 1041 int ret; 1042 1043 struct perf_tool eops = { 1044 .sample = process_sample_event, 1045 .comm = perf_event__process_comm, 1046 .ordered_events = true, 1047 }; 1048 struct perf_data_file file = { 1049 .path = kvm->file_name, 1050 .mode = PERF_DATA_MODE_READ, 1051 .force = kvm->force, 1052 }; 1053 1054 kvm->tool = eops; 1055 kvm->session = perf_session__new(&file, false, &kvm->tool); 1056 if (!kvm->session) { 1057 pr_err("Initializing perf session failed\n"); 1058 return -1; 1059 } 1060 1061 symbol__init(&kvm->session->header.env); 1062 1063 if (!perf_session__has_traces(kvm->session, "kvm record")) { 1064 ret = -EINVAL; 1065 goto out_delete; 1066 } 1067 1068 /* 1069 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not 1070 * traced in the old kernel. 1071 */ 1072 ret = cpu_isa_config(kvm); 1073 if (ret < 0) 1074 goto out_delete; 1075 1076 ret = perf_session__process_events(kvm->session); 1077 1078 out_delete: 1079 perf_session__delete(kvm->session); 1080 return ret; 1081 } 1082 1083 static int parse_target_str(struct perf_kvm_stat *kvm) 1084 { 1085 if (kvm->opts.target.pid) { 1086 kvm->pid_list = intlist__new(kvm->opts.target.pid); 1087 if (kvm->pid_list == NULL) { 1088 pr_err("Error parsing process id string\n"); 1089 return -EINVAL; 1090 } 1091 } 1092 1093 return 0; 1094 } 1095 1096 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm) 1097 { 1098 int ret = -EINVAL; 1099 int vcpu = kvm->trace_vcpu; 1100 1101 if (parse_target_str(kvm) != 0) 1102 goto exit; 1103 1104 if (!verify_vcpu(vcpu)) 1105 goto exit; 1106 1107 if (!select_key(kvm)) 1108 goto exit; 1109 1110 if (!register_kvm_events_ops(kvm)) 1111 goto exit; 1112 1113 init_kvm_event_record(kvm); 1114 setup_pager(); 1115 1116 ret = read_events(kvm); 1117 if (ret) 1118 goto exit; 1119 1120 sort_result(kvm); 1121 print_result(kvm); 1122 1123 exit: 1124 return ret; 1125 } 1126 1127 #define STRDUP_FAIL_EXIT(s) \ 1128 ({ char *_p; \ 1129 _p = strdup(s); \ 1130 if (!_p) \ 1131 return -ENOMEM; \ 1132 _p; \ 1133 }) 1134 1135 int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused) 1136 { 1137 return 0; 1138 } 1139 1140 static int 1141 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv) 1142 { 1143 unsigned int rec_argc, i, j, events_tp_size; 1144 const char **rec_argv; 1145 const char * const record_args[] = { 1146 "record", 1147 "-R", 1148 "-m", "1024", 1149 "-c", "1", 1150 }; 1151 const char * const kvm_stat_record_usage[] = { 1152 "perf kvm stat record [<options>]", 1153 NULL 1154 }; 1155 const char * const *events_tp; 1156 int ret; 1157 1158 events_tp_size = 0; 1159 ret = setup_kvm_events_tp(kvm); 1160 if (ret < 0) { 1161 pr_err("Unable to setup the kvm tracepoints\n"); 1162 return ret; 1163 } 1164 1165 for (events_tp = kvm_events_tp; *events_tp; events_tp++) 1166 events_tp_size++; 1167 1168 rec_argc = ARRAY_SIZE(record_args) + argc + 2 + 1169 2 * events_tp_size; 1170 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1171 1172 if (rec_argv == NULL) 1173 return -ENOMEM; 1174 1175 for (i = 0; i < ARRAY_SIZE(record_args); i++) 1176 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]); 1177 1178 for (j = 0; j < events_tp_size; j++) { 1179 rec_argv[i++] = "-e"; 1180 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]); 1181 } 1182 1183 rec_argv[i++] = STRDUP_FAIL_EXIT("-o"); 1184 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name); 1185 1186 for (j = 1; j < (unsigned int)argc; j++, i++) 1187 rec_argv[i] = argv[j]; 1188 1189 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN); 1190 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN); 1191 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN); 1192 1193 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED); 1194 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED); 1195 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED); 1196 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED); 1197 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED); 1198 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED); 1199 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED); 1200 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED); 1201 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED); 1202 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED); 1203 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED); 1204 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED); 1205 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED); 1206 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED); 1207 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED); 1208 1209 record_usage = kvm_stat_record_usage; 1210 return cmd_record(i, rec_argv, NULL); 1211 } 1212 1213 static int 1214 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv) 1215 { 1216 const struct option kvm_events_report_options[] = { 1217 OPT_STRING(0, "event", &kvm->report_event, "report event", 1218 "event for reporting: vmexit, " 1219 "mmio (x86 only), ioport (x86 only)"), 1220 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu, 1221 "vcpu id to report"), 1222 OPT_STRING('k', "key", &kvm->sort_key, "sort-key", 1223 "key for sorting: sample(sort by samples number)" 1224 " time (sort by avg time)"), 1225 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid", 1226 "analyze events only for given process id(s)"), 1227 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"), 1228 OPT_END() 1229 }; 1230 1231 const char * const kvm_events_report_usage[] = { 1232 "perf kvm stat report [<options>]", 1233 NULL 1234 }; 1235 1236 if (argc) { 1237 argc = parse_options(argc, argv, 1238 kvm_events_report_options, 1239 kvm_events_report_usage, 0); 1240 if (argc) 1241 usage_with_options(kvm_events_report_usage, 1242 kvm_events_report_options); 1243 } 1244 1245 if (!kvm->opts.target.pid) 1246 kvm->opts.target.system_wide = true; 1247 1248 return kvm_events_report_vcpu(kvm); 1249 } 1250 1251 #ifdef HAVE_TIMERFD_SUPPORT 1252 static struct perf_evlist *kvm_live_event_list(void) 1253 { 1254 struct perf_evlist *evlist; 1255 char *tp, *name, *sys; 1256 int err = -1; 1257 const char * const *events_tp; 1258 1259 evlist = perf_evlist__new(); 1260 if (evlist == NULL) 1261 return NULL; 1262 1263 for (events_tp = kvm_events_tp; *events_tp; events_tp++) { 1264 1265 tp = strdup(*events_tp); 1266 if (tp == NULL) 1267 goto out; 1268 1269 /* split tracepoint into subsystem and name */ 1270 sys = tp; 1271 name = strchr(tp, ':'); 1272 if (name == NULL) { 1273 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n", 1274 *events_tp); 1275 free(tp); 1276 goto out; 1277 } 1278 *name = '\0'; 1279 name++; 1280 1281 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) { 1282 pr_err("Failed to add %s tracepoint to the list\n", *events_tp); 1283 free(tp); 1284 goto out; 1285 } 1286 1287 free(tp); 1288 } 1289 1290 err = 0; 1291 1292 out: 1293 if (err) { 1294 perf_evlist__delete(evlist); 1295 evlist = NULL; 1296 } 1297 1298 return evlist; 1299 } 1300 1301 static int kvm_events_live(struct perf_kvm_stat *kvm, 1302 int argc, const char **argv) 1303 { 1304 char errbuf[BUFSIZ]; 1305 int err; 1306 1307 const struct option live_options[] = { 1308 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid", 1309 "record events on existing process id"), 1310 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages", 1311 "number of mmap data pages", 1312 perf_evlist__parse_mmap_pages), 1313 OPT_INCR('v', "verbose", &verbose, 1314 "be more verbose (show counter open errors, etc)"), 1315 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide, 1316 "system-wide collection from all CPUs"), 1317 OPT_UINTEGER('d', "display", &kvm->display_time, 1318 "time in seconds between display updates"), 1319 OPT_STRING(0, "event", &kvm->report_event, "report event", 1320 "event for reporting: " 1321 "vmexit, mmio (x86 only), ioport (x86 only)"), 1322 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu, 1323 "vcpu id to report"), 1324 OPT_STRING('k', "key", &kvm->sort_key, "sort-key", 1325 "key for sorting: sample(sort by samples number)" 1326 " time (sort by avg time)"), 1327 OPT_U64(0, "duration", &kvm->duration, 1328 "show events other than" 1329 " HLT (x86 only) or Wait state (s390 only)" 1330 " that take longer than duration usecs"), 1331 OPT_UINTEGER(0, "proc-map-timeout", &kvm->opts.proc_map_timeout, 1332 "per thread proc mmap processing timeout in ms"), 1333 OPT_END() 1334 }; 1335 const char * const live_usage[] = { 1336 "perf kvm stat live [<options>]", 1337 NULL 1338 }; 1339 struct perf_data_file file = { 1340 .mode = PERF_DATA_MODE_WRITE, 1341 }; 1342 1343 1344 /* event handling */ 1345 kvm->tool.sample = process_sample_event; 1346 kvm->tool.comm = perf_event__process_comm; 1347 kvm->tool.exit = perf_event__process_exit; 1348 kvm->tool.fork = perf_event__process_fork; 1349 kvm->tool.lost = process_lost_event; 1350 kvm->tool.ordered_events = true; 1351 perf_tool__fill_defaults(&kvm->tool); 1352 1353 /* set defaults */ 1354 kvm->display_time = 1; 1355 kvm->opts.user_interval = 1; 1356 kvm->opts.mmap_pages = 512; 1357 kvm->opts.target.uses_mmap = false; 1358 kvm->opts.target.uid_str = NULL; 1359 kvm->opts.target.uid = UINT_MAX; 1360 kvm->opts.proc_map_timeout = 500; 1361 1362 symbol__init(NULL); 1363 disable_buildid_cache(); 1364 1365 use_browser = 0; 1366 1367 if (argc) { 1368 argc = parse_options(argc, argv, live_options, 1369 live_usage, 0); 1370 if (argc) 1371 usage_with_options(live_usage, live_options); 1372 } 1373 1374 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */ 1375 1376 /* 1377 * target related setups 1378 */ 1379 err = target__validate(&kvm->opts.target); 1380 if (err) { 1381 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ); 1382 ui__warning("%s", errbuf); 1383 } 1384 1385 if (target__none(&kvm->opts.target)) 1386 kvm->opts.target.system_wide = true; 1387 1388 1389 /* 1390 * generate the event list 1391 */ 1392 err = setup_kvm_events_tp(kvm); 1393 if (err < 0) { 1394 pr_err("Unable to setup the kvm tracepoints\n"); 1395 return err; 1396 } 1397 1398 kvm->evlist = kvm_live_event_list(); 1399 if (kvm->evlist == NULL) { 1400 err = -1; 1401 goto out; 1402 } 1403 1404 symbol_conf.nr_events = kvm->evlist->nr_entries; 1405 1406 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0) 1407 usage_with_options(live_usage, live_options); 1408 1409 /* 1410 * perf session 1411 */ 1412 kvm->session = perf_session__new(&file, false, &kvm->tool); 1413 if (kvm->session == NULL) { 1414 err = -1; 1415 goto out; 1416 } 1417 kvm->session->evlist = kvm->evlist; 1418 perf_session__set_id_hdr_size(kvm->session); 1419 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true); 1420 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target, 1421 kvm->evlist->threads, false, kvm->opts.proc_map_timeout); 1422 err = kvm_live_open_events(kvm); 1423 if (err) 1424 goto out; 1425 1426 err = kvm_events_live_report(kvm); 1427 1428 out: 1429 if (kvm->session) 1430 perf_session__delete(kvm->session); 1431 kvm->session = NULL; 1432 if (kvm->evlist) 1433 perf_evlist__delete(kvm->evlist); 1434 1435 return err; 1436 } 1437 #endif 1438 1439 static void print_kvm_stat_usage(void) 1440 { 1441 printf("Usage: perf kvm stat <command>\n\n"); 1442 1443 printf("# Available commands:\n"); 1444 printf("\trecord: record kvm events\n"); 1445 printf("\treport: report statistical data of kvm events\n"); 1446 printf("\tlive: live reporting of statistical data of kvm events\n"); 1447 1448 printf("\nOtherwise, it is the alias of 'perf stat':\n"); 1449 } 1450 1451 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv) 1452 { 1453 struct perf_kvm_stat kvm = { 1454 .file_name = file_name, 1455 1456 .trace_vcpu = -1, 1457 .report_event = "vmexit", 1458 .sort_key = "sample", 1459 1460 }; 1461 1462 if (argc == 1) { 1463 print_kvm_stat_usage(); 1464 goto perf_stat; 1465 } 1466 1467 if (!strncmp(argv[1], "rec", 3)) 1468 return kvm_events_record(&kvm, argc - 1, argv + 1); 1469 1470 if (!strncmp(argv[1], "rep", 3)) 1471 return kvm_events_report(&kvm, argc - 1 , argv + 1); 1472 1473 #ifdef HAVE_TIMERFD_SUPPORT 1474 if (!strncmp(argv[1], "live", 4)) 1475 return kvm_events_live(&kvm, argc - 1 , argv + 1); 1476 #endif 1477 1478 perf_stat: 1479 return cmd_stat(argc, argv, NULL); 1480 } 1481 #endif /* HAVE_KVM_STAT_SUPPORT */ 1482 1483 static int __cmd_record(const char *file_name, int argc, const char **argv) 1484 { 1485 int rec_argc, i = 0, j; 1486 const char **rec_argv; 1487 1488 rec_argc = argc + 2; 1489 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1490 rec_argv[i++] = strdup("record"); 1491 rec_argv[i++] = strdup("-o"); 1492 rec_argv[i++] = strdup(file_name); 1493 for (j = 1; j < argc; j++, i++) 1494 rec_argv[i] = argv[j]; 1495 1496 BUG_ON(i != rec_argc); 1497 1498 return cmd_record(i, rec_argv, NULL); 1499 } 1500 1501 static int __cmd_report(const char *file_name, int argc, const char **argv) 1502 { 1503 int rec_argc, i = 0, j; 1504 const char **rec_argv; 1505 1506 rec_argc = argc + 2; 1507 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1508 rec_argv[i++] = strdup("report"); 1509 rec_argv[i++] = strdup("-i"); 1510 rec_argv[i++] = strdup(file_name); 1511 for (j = 1; j < argc; j++, i++) 1512 rec_argv[i] = argv[j]; 1513 1514 BUG_ON(i != rec_argc); 1515 1516 return cmd_report(i, rec_argv, NULL); 1517 } 1518 1519 static int 1520 __cmd_buildid_list(const char *file_name, int argc, const char **argv) 1521 { 1522 int rec_argc, i = 0, j; 1523 const char **rec_argv; 1524 1525 rec_argc = argc + 2; 1526 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1527 rec_argv[i++] = strdup("buildid-list"); 1528 rec_argv[i++] = strdup("-i"); 1529 rec_argv[i++] = strdup(file_name); 1530 for (j = 1; j < argc; j++, i++) 1531 rec_argv[i] = argv[j]; 1532 1533 BUG_ON(i != rec_argc); 1534 1535 return cmd_buildid_list(i, rec_argv, NULL); 1536 } 1537 1538 int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused) 1539 { 1540 const char *file_name = NULL; 1541 const struct option kvm_options[] = { 1542 OPT_STRING('i', "input", &file_name, "file", 1543 "Input file name"), 1544 OPT_STRING('o', "output", &file_name, "file", 1545 "Output file name"), 1546 OPT_BOOLEAN(0, "guest", &perf_guest, 1547 "Collect guest os data"), 1548 OPT_BOOLEAN(0, "host", &perf_host, 1549 "Collect host os data"), 1550 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory", 1551 "guest mount directory under which every guest os" 1552 " instance has a subdir"), 1553 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name, 1554 "file", "file saving guest os vmlinux"), 1555 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms, 1556 "file", "file saving guest os /proc/kallsyms"), 1557 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules, 1558 "file", "file saving guest os /proc/modules"), 1559 OPT_INCR('v', "verbose", &verbose, 1560 "be more verbose (show counter open errors, etc)"), 1561 OPT_END() 1562 }; 1563 1564 const char *const kvm_subcommands[] = { "top", "record", "report", "diff", 1565 "buildid-list", "stat", NULL }; 1566 const char *kvm_usage[] = { NULL, NULL }; 1567 1568 perf_host = 0; 1569 perf_guest = 1; 1570 1571 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage, 1572 PARSE_OPT_STOP_AT_NON_OPTION); 1573 if (!argc) 1574 usage_with_options(kvm_usage, kvm_options); 1575 1576 if (!perf_host) 1577 perf_guest = 1; 1578 1579 if (!file_name) { 1580 file_name = get_filename_for_perf_kvm(); 1581 1582 if (!file_name) { 1583 pr_err("Failed to allocate memory for filename\n"); 1584 return -ENOMEM; 1585 } 1586 } 1587 1588 if (!strncmp(argv[0], "rec", 3)) 1589 return __cmd_record(file_name, argc, argv); 1590 else if (!strncmp(argv[0], "rep", 3)) 1591 return __cmd_report(file_name, argc, argv); 1592 else if (!strncmp(argv[0], "diff", 4)) 1593 return cmd_diff(argc, argv, NULL); 1594 else if (!strncmp(argv[0], "top", 3)) 1595 return cmd_top(argc, argv, NULL); 1596 else if (!strncmp(argv[0], "buildid-list", 12)) 1597 return __cmd_buildid_list(file_name, argc, argv); 1598 #ifdef HAVE_KVM_STAT_SUPPORT 1599 else if (!strncmp(argv[0], "stat", 4)) 1600 return kvm_cmd_stat(file_name, argc, argv); 1601 #endif 1602 else 1603 usage_with_options(kvm_usage, kvm_options); 1604 1605 return 0; 1606 } 1607