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(thread) && 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__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 struct thread *thread; 654 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, 655 tool); 656 657 if (skip_sample(kvm, sample)) 658 return 0; 659 660 thread = machine__findnew_thread(machine, sample->pid, sample->tid); 661 if (thread == NULL) { 662 pr_debug("problem processing %d event, skipping it.\n", 663 event->header.type); 664 return -1; 665 } 666 667 if (!handle_kvm_event(kvm, thread, evsel, sample)) 668 return -1; 669 670 return 0; 671 } 672 673 static int cpu_isa_config(struct perf_kvm_stat *kvm) 674 { 675 char buf[64], *cpuid; 676 int err; 677 678 if (kvm->live) { 679 err = get_cpuid(buf, sizeof(buf)); 680 if (err != 0) { 681 pr_err("Failed to look up CPU type\n"); 682 return err; 683 } 684 cpuid = buf; 685 } else 686 cpuid = kvm->session->header.env.cpuid; 687 688 if (!cpuid) { 689 pr_err("Failed to look up CPU type\n"); 690 return -EINVAL; 691 } 692 693 err = cpu_isa_init(kvm, cpuid); 694 if (err == -ENOTSUP) 695 pr_err("CPU %s is not supported.\n", cpuid); 696 697 return err; 698 } 699 700 static bool verify_vcpu(int vcpu) 701 { 702 if (vcpu != -1 && vcpu < 0) { 703 pr_err("Invalid vcpu:%d.\n", vcpu); 704 return false; 705 } 706 707 return true; 708 } 709 710 #ifdef HAVE_TIMERFD_SUPPORT 711 /* keeping the max events to a modest level to keep 712 * the processing of samples per mmap smooth. 713 */ 714 #define PERF_KVM__MAX_EVENTS_PER_MMAP 25 715 716 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx, 717 u64 *mmap_time) 718 { 719 union perf_event *event; 720 struct perf_sample sample; 721 s64 n = 0; 722 int err; 723 724 *mmap_time = ULLONG_MAX; 725 while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) { 726 err = perf_evlist__parse_sample(kvm->evlist, event, &sample); 727 if (err) { 728 perf_evlist__mmap_consume(kvm->evlist, idx); 729 pr_err("Failed to parse sample\n"); 730 return -1; 731 } 732 733 err = perf_session_queue_event(kvm->session, event, &kvm->tool, &sample, 0); 734 /* 735 * FIXME: Here we can't consume the event, as perf_session_queue_event will 736 * point to it, and it'll get possibly overwritten by the kernel. 737 */ 738 perf_evlist__mmap_consume(kvm->evlist, idx); 739 740 if (err) { 741 pr_err("Failed to enqueue sample: %d\n", err); 742 return -1; 743 } 744 745 /* save time stamp of our first sample for this mmap */ 746 if (n == 0) 747 *mmap_time = sample.time; 748 749 /* limit events per mmap handled all at once */ 750 n++; 751 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP) 752 break; 753 } 754 755 return n; 756 } 757 758 static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm) 759 { 760 int i, err, throttled = 0; 761 s64 n, ntotal = 0; 762 u64 flush_time = ULLONG_MAX, mmap_time; 763 764 for (i = 0; i < kvm->evlist->nr_mmaps; i++) { 765 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time); 766 if (n < 0) 767 return -1; 768 769 /* flush time is going to be the minimum of all the individual 770 * mmap times. Essentially, we flush all the samples queued up 771 * from the last pass under our minimal start time -- that leaves 772 * a very small race for samples to come in with a lower timestamp. 773 * The ioctl to return the perf_clock timestamp should close the 774 * race entirely. 775 */ 776 if (mmap_time < flush_time) 777 flush_time = mmap_time; 778 779 ntotal += n; 780 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP) 781 throttled = 1; 782 } 783 784 /* flush queue after each round in which we processed events */ 785 if (ntotal) { 786 kvm->session->ordered_events.next_flush = flush_time; 787 err = kvm->tool.finished_round(&kvm->tool, NULL, kvm->session); 788 if (err) { 789 if (kvm->lost_events) 790 pr_info("\nLost events: %" PRIu64 "\n\n", 791 kvm->lost_events); 792 return err; 793 } 794 } 795 796 return throttled; 797 } 798 799 static volatile int done; 800 801 static void sig_handler(int sig __maybe_unused) 802 { 803 done = 1; 804 } 805 806 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm) 807 { 808 struct itimerspec new_value; 809 int rc = -1; 810 811 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK); 812 if (kvm->timerfd < 0) { 813 pr_err("timerfd_create failed\n"); 814 goto out; 815 } 816 817 new_value.it_value.tv_sec = kvm->display_time; 818 new_value.it_value.tv_nsec = 0; 819 new_value.it_interval.tv_sec = kvm->display_time; 820 new_value.it_interval.tv_nsec = 0; 821 822 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) { 823 pr_err("timerfd_settime failed: %d\n", errno); 824 close(kvm->timerfd); 825 goto out; 826 } 827 828 rc = 0; 829 out: 830 return rc; 831 } 832 833 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm) 834 { 835 uint64_t c; 836 int rc; 837 838 rc = read(kvm->timerfd, &c, sizeof(uint64_t)); 839 if (rc < 0) { 840 if (errno == EAGAIN) 841 return 0; 842 843 pr_err("Failed to read timer fd: %d\n", errno); 844 return -1; 845 } 846 847 if (rc != sizeof(uint64_t)) { 848 pr_err("Error reading timer fd - invalid size returned\n"); 849 return -1; 850 } 851 852 if (c != 1) 853 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1); 854 855 /* update display */ 856 sort_result(kvm); 857 print_result(kvm); 858 859 /* reset counts */ 860 clear_events_cache_stats(kvm->kvm_events_cache); 861 kvm->total_count = 0; 862 kvm->total_time = 0; 863 kvm->lost_events = 0; 864 865 return 0; 866 } 867 868 static int fd_set_nonblock(int fd) 869 { 870 long arg = 0; 871 872 arg = fcntl(fd, F_GETFL); 873 if (arg < 0) { 874 pr_err("Failed to get current flags for fd %d\n", fd); 875 return -1; 876 } 877 878 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) { 879 pr_err("Failed to set non-block option on fd %d\n", fd); 880 return -1; 881 } 882 883 return 0; 884 } 885 886 static int perf_kvm__handle_stdin(void) 887 { 888 int c; 889 890 c = getc(stdin); 891 if (c == 'q') 892 return 1; 893 894 return 0; 895 } 896 897 static int kvm_events_live_report(struct perf_kvm_stat *kvm) 898 { 899 int nr_stdin, ret, err = -EINVAL; 900 struct termios save; 901 902 /* live flag must be set first */ 903 kvm->live = true; 904 905 ret = cpu_isa_config(kvm); 906 if (ret < 0) 907 return ret; 908 909 if (!verify_vcpu(kvm->trace_vcpu) || 910 !select_key(kvm) || 911 !register_kvm_events_ops(kvm)) { 912 goto out; 913 } 914 915 set_term_quiet_input(&save); 916 init_kvm_event_record(kvm); 917 918 signal(SIGINT, sig_handler); 919 signal(SIGTERM, sig_handler); 920 921 /* add timer fd */ 922 if (perf_kvm__timerfd_create(kvm) < 0) { 923 err = -1; 924 goto out; 925 } 926 927 if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0) 928 goto out; 929 930 nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin)); 931 if (nr_stdin < 0) 932 goto out; 933 934 if (fd_set_nonblock(fileno(stdin)) != 0) 935 goto out; 936 937 /* everything is good - enable the events and process */ 938 perf_evlist__enable(kvm->evlist); 939 940 while (!done) { 941 struct fdarray *fda = &kvm->evlist->pollfd; 942 int rc; 943 944 rc = perf_kvm__mmap_read(kvm); 945 if (rc < 0) 946 break; 947 948 err = perf_kvm__handle_timerfd(kvm); 949 if (err) 950 goto out; 951 952 if (fda->entries[nr_stdin].revents & POLLIN) 953 done = perf_kvm__handle_stdin(); 954 955 if (!rc && !done) 956 err = fdarray__poll(fda, 100); 957 } 958 959 perf_evlist__disable(kvm->evlist); 960 961 if (err == 0) { 962 sort_result(kvm); 963 print_result(kvm); 964 } 965 966 out: 967 if (kvm->timerfd >= 0) 968 close(kvm->timerfd); 969 970 tcsetattr(0, TCSAFLUSH, &save); 971 return err; 972 } 973 974 static int kvm_live_open_events(struct perf_kvm_stat *kvm) 975 { 976 int err, rc = -1; 977 struct perf_evsel *pos; 978 struct perf_evlist *evlist = kvm->evlist; 979 char sbuf[STRERR_BUFSIZE]; 980 981 perf_evlist__config(evlist, &kvm->opts); 982 983 /* 984 * Note: exclude_{guest,host} do not apply here. 985 * This command processes KVM tracepoints from host only 986 */ 987 evlist__for_each(evlist, pos) { 988 struct perf_event_attr *attr = &pos->attr; 989 990 /* make sure these *are* set */ 991 perf_evsel__set_sample_bit(pos, TID); 992 perf_evsel__set_sample_bit(pos, TIME); 993 perf_evsel__set_sample_bit(pos, CPU); 994 perf_evsel__set_sample_bit(pos, RAW); 995 /* make sure these are *not*; want as small a sample as possible */ 996 perf_evsel__reset_sample_bit(pos, PERIOD); 997 perf_evsel__reset_sample_bit(pos, IP); 998 perf_evsel__reset_sample_bit(pos, CALLCHAIN); 999 perf_evsel__reset_sample_bit(pos, ADDR); 1000 perf_evsel__reset_sample_bit(pos, READ); 1001 attr->mmap = 0; 1002 attr->comm = 0; 1003 attr->task = 0; 1004 1005 attr->sample_period = 1; 1006 1007 attr->watermark = 0; 1008 attr->wakeup_events = 1000; 1009 1010 /* will enable all once we are ready */ 1011 attr->disabled = 1; 1012 } 1013 1014 err = perf_evlist__open(evlist); 1015 if (err < 0) { 1016 printf("Couldn't create the events: %s\n", 1017 strerror_r(errno, sbuf, sizeof(sbuf))); 1018 goto out; 1019 } 1020 1021 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) { 1022 ui__error("Failed to mmap the events: %s\n", 1023 strerror_r(errno, sbuf, sizeof(sbuf))); 1024 perf_evlist__close(evlist); 1025 goto out; 1026 } 1027 1028 rc = 0; 1029 1030 out: 1031 return rc; 1032 } 1033 #endif 1034 1035 static int read_events(struct perf_kvm_stat *kvm) 1036 { 1037 int ret; 1038 1039 struct perf_tool eops = { 1040 .sample = process_sample_event, 1041 .comm = perf_event__process_comm, 1042 .ordered_events = true, 1043 }; 1044 struct perf_data_file file = { 1045 .path = kvm->file_name, 1046 .mode = PERF_DATA_MODE_READ, 1047 }; 1048 1049 kvm->tool = eops; 1050 kvm->session = perf_session__new(&file, false, &kvm->tool); 1051 if (!kvm->session) { 1052 pr_err("Initializing perf session failed\n"); 1053 return -1; 1054 } 1055 1056 symbol__init(&kvm->session->header.env); 1057 1058 if (!perf_session__has_traces(kvm->session, "kvm record")) 1059 return -EINVAL; 1060 1061 /* 1062 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not 1063 * traced in the old kernel. 1064 */ 1065 ret = cpu_isa_config(kvm); 1066 if (ret < 0) 1067 return ret; 1068 1069 return perf_session__process_events(kvm->session, &kvm->tool); 1070 } 1071 1072 static int parse_target_str(struct perf_kvm_stat *kvm) 1073 { 1074 if (kvm->opts.target.pid) { 1075 kvm->pid_list = intlist__new(kvm->opts.target.pid); 1076 if (kvm->pid_list == NULL) { 1077 pr_err("Error parsing process id string\n"); 1078 return -EINVAL; 1079 } 1080 } 1081 1082 return 0; 1083 } 1084 1085 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm) 1086 { 1087 int ret = -EINVAL; 1088 int vcpu = kvm->trace_vcpu; 1089 1090 if (parse_target_str(kvm) != 0) 1091 goto exit; 1092 1093 if (!verify_vcpu(vcpu)) 1094 goto exit; 1095 1096 if (!select_key(kvm)) 1097 goto exit; 1098 1099 if (!register_kvm_events_ops(kvm)) 1100 goto exit; 1101 1102 init_kvm_event_record(kvm); 1103 setup_pager(); 1104 1105 ret = read_events(kvm); 1106 if (ret) 1107 goto exit; 1108 1109 sort_result(kvm); 1110 print_result(kvm); 1111 1112 exit: 1113 return ret; 1114 } 1115 1116 #define STRDUP_FAIL_EXIT(s) \ 1117 ({ char *_p; \ 1118 _p = strdup(s); \ 1119 if (!_p) \ 1120 return -ENOMEM; \ 1121 _p; \ 1122 }) 1123 1124 static int 1125 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv) 1126 { 1127 unsigned int rec_argc, i, j, events_tp_size; 1128 const char **rec_argv; 1129 const char * const record_args[] = { 1130 "record", 1131 "-R", 1132 "-m", "1024", 1133 "-c", "1", 1134 }; 1135 const char * const kvm_stat_record_usage[] = { 1136 "perf kvm stat record [<options>]", 1137 NULL 1138 }; 1139 const char * const *events_tp; 1140 events_tp_size = 0; 1141 1142 for (events_tp = kvm_events_tp; *events_tp; events_tp++) 1143 events_tp_size++; 1144 1145 rec_argc = ARRAY_SIZE(record_args) + argc + 2 + 1146 2 * events_tp_size; 1147 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1148 1149 if (rec_argv == NULL) 1150 return -ENOMEM; 1151 1152 for (i = 0; i < ARRAY_SIZE(record_args); i++) 1153 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]); 1154 1155 for (j = 0; j < events_tp_size; j++) { 1156 rec_argv[i++] = "-e"; 1157 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]); 1158 } 1159 1160 rec_argv[i++] = STRDUP_FAIL_EXIT("-o"); 1161 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name); 1162 1163 for (j = 1; j < (unsigned int)argc; j++, i++) 1164 rec_argv[i] = argv[j]; 1165 1166 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN); 1167 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN); 1168 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN); 1169 1170 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED); 1171 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED); 1172 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED); 1173 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED); 1174 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED); 1175 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED); 1176 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED); 1177 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED); 1178 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED); 1179 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED); 1180 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED); 1181 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED); 1182 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED); 1183 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED); 1184 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED); 1185 1186 record_usage = kvm_stat_record_usage; 1187 return cmd_record(i, rec_argv, NULL); 1188 } 1189 1190 static int 1191 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv) 1192 { 1193 const struct option kvm_events_report_options[] = { 1194 OPT_STRING(0, "event", &kvm->report_event, "report event", 1195 "event for reporting: vmexit, " 1196 "mmio (x86 only), ioport (x86 only)"), 1197 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu, 1198 "vcpu id to report"), 1199 OPT_STRING('k', "key", &kvm->sort_key, "sort-key", 1200 "key for sorting: sample(sort by samples number)" 1201 " time (sort by avg time)"), 1202 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid", 1203 "analyze events only for given process id(s)"), 1204 OPT_END() 1205 }; 1206 1207 const char * const kvm_events_report_usage[] = { 1208 "perf kvm stat report [<options>]", 1209 NULL 1210 }; 1211 1212 if (argc) { 1213 argc = parse_options(argc, argv, 1214 kvm_events_report_options, 1215 kvm_events_report_usage, 0); 1216 if (argc) 1217 usage_with_options(kvm_events_report_usage, 1218 kvm_events_report_options); 1219 } 1220 1221 if (!kvm->opts.target.pid) 1222 kvm->opts.target.system_wide = true; 1223 1224 return kvm_events_report_vcpu(kvm); 1225 } 1226 1227 #ifdef HAVE_TIMERFD_SUPPORT 1228 static struct perf_evlist *kvm_live_event_list(void) 1229 { 1230 struct perf_evlist *evlist; 1231 char *tp, *name, *sys; 1232 int err = -1; 1233 const char * const *events_tp; 1234 1235 evlist = perf_evlist__new(); 1236 if (evlist == NULL) 1237 return NULL; 1238 1239 for (events_tp = kvm_events_tp; *events_tp; events_tp++) { 1240 1241 tp = strdup(*events_tp); 1242 if (tp == NULL) 1243 goto out; 1244 1245 /* split tracepoint into subsystem and name */ 1246 sys = tp; 1247 name = strchr(tp, ':'); 1248 if (name == NULL) { 1249 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n", 1250 *events_tp); 1251 free(tp); 1252 goto out; 1253 } 1254 *name = '\0'; 1255 name++; 1256 1257 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) { 1258 pr_err("Failed to add %s tracepoint to the list\n", *events_tp); 1259 free(tp); 1260 goto out; 1261 } 1262 1263 free(tp); 1264 } 1265 1266 err = 0; 1267 1268 out: 1269 if (err) { 1270 perf_evlist__delete(evlist); 1271 evlist = NULL; 1272 } 1273 1274 return evlist; 1275 } 1276 1277 static int kvm_events_live(struct perf_kvm_stat *kvm, 1278 int argc, const char **argv) 1279 { 1280 char errbuf[BUFSIZ]; 1281 int err; 1282 1283 const struct option live_options[] = { 1284 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid", 1285 "record events on existing process id"), 1286 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages", 1287 "number of mmap data pages", 1288 perf_evlist__parse_mmap_pages), 1289 OPT_INCR('v', "verbose", &verbose, 1290 "be more verbose (show counter open errors, etc)"), 1291 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide, 1292 "system-wide collection from all CPUs"), 1293 OPT_UINTEGER('d', "display", &kvm->display_time, 1294 "time in seconds between display updates"), 1295 OPT_STRING(0, "event", &kvm->report_event, "report event", 1296 "event for reporting: " 1297 "vmexit, mmio (x86 only), ioport (x86 only)"), 1298 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu, 1299 "vcpu id to report"), 1300 OPT_STRING('k', "key", &kvm->sort_key, "sort-key", 1301 "key for sorting: sample(sort by samples number)" 1302 " time (sort by avg time)"), 1303 OPT_U64(0, "duration", &kvm->duration, 1304 "show events other than" 1305 " HLT (x86 only) or Wait state (s390 only)" 1306 " that take longer than duration usecs"), 1307 OPT_END() 1308 }; 1309 const char * const live_usage[] = { 1310 "perf kvm stat live [<options>]", 1311 NULL 1312 }; 1313 struct perf_data_file file = { 1314 .mode = PERF_DATA_MODE_WRITE, 1315 }; 1316 1317 1318 /* event handling */ 1319 kvm->tool.sample = process_sample_event; 1320 kvm->tool.comm = perf_event__process_comm; 1321 kvm->tool.exit = perf_event__process_exit; 1322 kvm->tool.fork = perf_event__process_fork; 1323 kvm->tool.lost = process_lost_event; 1324 kvm->tool.ordered_events = true; 1325 perf_tool__fill_defaults(&kvm->tool); 1326 1327 /* set defaults */ 1328 kvm->display_time = 1; 1329 kvm->opts.user_interval = 1; 1330 kvm->opts.mmap_pages = 512; 1331 kvm->opts.target.uses_mmap = false; 1332 kvm->opts.target.uid_str = NULL; 1333 kvm->opts.target.uid = UINT_MAX; 1334 1335 symbol__init(NULL); 1336 disable_buildid_cache(); 1337 1338 use_browser = 0; 1339 setup_browser(false); 1340 1341 if (argc) { 1342 argc = parse_options(argc, argv, live_options, 1343 live_usage, 0); 1344 if (argc) 1345 usage_with_options(live_usage, live_options); 1346 } 1347 1348 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */ 1349 1350 /* 1351 * target related setups 1352 */ 1353 err = target__validate(&kvm->opts.target); 1354 if (err) { 1355 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ); 1356 ui__warning("%s", errbuf); 1357 } 1358 1359 if (target__none(&kvm->opts.target)) 1360 kvm->opts.target.system_wide = true; 1361 1362 1363 /* 1364 * generate the event list 1365 */ 1366 kvm->evlist = kvm_live_event_list(); 1367 if (kvm->evlist == NULL) { 1368 err = -1; 1369 goto out; 1370 } 1371 1372 symbol_conf.nr_events = kvm->evlist->nr_entries; 1373 1374 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0) 1375 usage_with_options(live_usage, live_options); 1376 1377 /* 1378 * perf session 1379 */ 1380 kvm->session = perf_session__new(&file, false, &kvm->tool); 1381 if (kvm->session == NULL) { 1382 err = -1; 1383 goto out; 1384 } 1385 kvm->session->evlist = kvm->evlist; 1386 perf_session__set_id_hdr_size(kvm->session); 1387 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true); 1388 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target, 1389 kvm->evlist->threads, false); 1390 err = kvm_live_open_events(kvm); 1391 if (err) 1392 goto out; 1393 1394 err = kvm_events_live_report(kvm); 1395 1396 out: 1397 exit_browser(0); 1398 1399 if (kvm->session) 1400 perf_session__delete(kvm->session); 1401 kvm->session = NULL; 1402 if (kvm->evlist) 1403 perf_evlist__delete(kvm->evlist); 1404 1405 return err; 1406 } 1407 #endif 1408 1409 static void print_kvm_stat_usage(void) 1410 { 1411 printf("Usage: perf kvm stat <command>\n\n"); 1412 1413 printf("# Available commands:\n"); 1414 printf("\trecord: record kvm events\n"); 1415 printf("\treport: report statistical data of kvm events\n"); 1416 printf("\tlive: live reporting of statistical data of kvm events\n"); 1417 1418 printf("\nOtherwise, it is the alias of 'perf stat':\n"); 1419 } 1420 1421 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv) 1422 { 1423 struct perf_kvm_stat kvm = { 1424 .file_name = file_name, 1425 1426 .trace_vcpu = -1, 1427 .report_event = "vmexit", 1428 .sort_key = "sample", 1429 1430 }; 1431 1432 if (argc == 1) { 1433 print_kvm_stat_usage(); 1434 goto perf_stat; 1435 } 1436 1437 if (!strncmp(argv[1], "rec", 3)) 1438 return kvm_events_record(&kvm, argc - 1, argv + 1); 1439 1440 if (!strncmp(argv[1], "rep", 3)) 1441 return kvm_events_report(&kvm, argc - 1 , argv + 1); 1442 1443 #ifdef HAVE_TIMERFD_SUPPORT 1444 if (!strncmp(argv[1], "live", 4)) 1445 return kvm_events_live(&kvm, argc - 1 , argv + 1); 1446 #endif 1447 1448 perf_stat: 1449 return cmd_stat(argc, argv, NULL); 1450 } 1451 #endif /* HAVE_KVM_STAT_SUPPORT */ 1452 1453 static int __cmd_record(const char *file_name, int argc, const char **argv) 1454 { 1455 int rec_argc, i = 0, j; 1456 const char **rec_argv; 1457 1458 rec_argc = argc + 2; 1459 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1460 rec_argv[i++] = strdup("record"); 1461 rec_argv[i++] = strdup("-o"); 1462 rec_argv[i++] = strdup(file_name); 1463 for (j = 1; j < argc; j++, i++) 1464 rec_argv[i] = argv[j]; 1465 1466 BUG_ON(i != rec_argc); 1467 1468 return cmd_record(i, rec_argv, NULL); 1469 } 1470 1471 static int __cmd_report(const char *file_name, int argc, const char **argv) 1472 { 1473 int rec_argc, i = 0, j; 1474 const char **rec_argv; 1475 1476 rec_argc = argc + 2; 1477 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1478 rec_argv[i++] = strdup("report"); 1479 rec_argv[i++] = strdup("-i"); 1480 rec_argv[i++] = strdup(file_name); 1481 for (j = 1; j < argc; j++, i++) 1482 rec_argv[i] = argv[j]; 1483 1484 BUG_ON(i != rec_argc); 1485 1486 return cmd_report(i, rec_argv, NULL); 1487 } 1488 1489 static int 1490 __cmd_buildid_list(const char *file_name, int argc, const char **argv) 1491 { 1492 int rec_argc, i = 0, j; 1493 const char **rec_argv; 1494 1495 rec_argc = argc + 2; 1496 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1497 rec_argv[i++] = strdup("buildid-list"); 1498 rec_argv[i++] = strdup("-i"); 1499 rec_argv[i++] = strdup(file_name); 1500 for (j = 1; j < argc; j++, i++) 1501 rec_argv[i] = argv[j]; 1502 1503 BUG_ON(i != rec_argc); 1504 1505 return cmd_buildid_list(i, rec_argv, NULL); 1506 } 1507 1508 int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused) 1509 { 1510 const char *file_name = NULL; 1511 const struct option kvm_options[] = { 1512 OPT_STRING('i', "input", &file_name, "file", 1513 "Input file name"), 1514 OPT_STRING('o', "output", &file_name, "file", 1515 "Output file name"), 1516 OPT_BOOLEAN(0, "guest", &perf_guest, 1517 "Collect guest os data"), 1518 OPT_BOOLEAN(0, "host", &perf_host, 1519 "Collect host os data"), 1520 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory", 1521 "guest mount directory under which every guest os" 1522 " instance has a subdir"), 1523 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name, 1524 "file", "file saving guest os vmlinux"), 1525 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms, 1526 "file", "file saving guest os /proc/kallsyms"), 1527 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules, 1528 "file", "file saving guest os /proc/modules"), 1529 OPT_INCR('v', "verbose", &verbose, 1530 "be more verbose (show counter open errors, etc)"), 1531 OPT_END() 1532 }; 1533 1534 const char *const kvm_subcommands[] = { "top", "record", "report", "diff", 1535 "buildid-list", "stat", NULL }; 1536 const char *kvm_usage[] = { NULL, NULL }; 1537 1538 perf_host = 0; 1539 perf_guest = 1; 1540 1541 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage, 1542 PARSE_OPT_STOP_AT_NON_OPTION); 1543 if (!argc) 1544 usage_with_options(kvm_usage, kvm_options); 1545 1546 if (!perf_host) 1547 perf_guest = 1; 1548 1549 if (!file_name) { 1550 file_name = get_filename_for_perf_kvm(); 1551 1552 if (!file_name) { 1553 pr_err("Failed to allocate memory for filename\n"); 1554 return -ENOMEM; 1555 } 1556 } 1557 1558 if (!strncmp(argv[0], "rec", 3)) 1559 return __cmd_record(file_name, argc, argv); 1560 else if (!strncmp(argv[0], "rep", 3)) 1561 return __cmd_report(file_name, argc, argv); 1562 else if (!strncmp(argv[0], "diff", 4)) 1563 return cmd_diff(argc, argv, NULL); 1564 else if (!strncmp(argv[0], "top", 3)) 1565 return cmd_top(argc, argv, NULL); 1566 else if (!strncmp(argv[0], "buildid-list", 12)) 1567 return __cmd_buildid_list(file_name, argc, argv); 1568 #ifdef HAVE_KVM_STAT_SUPPORT 1569 else if (!strncmp(argv[0], "stat", 4)) 1570 return kvm_cmd_stat(file_name, argc, argv); 1571 #endif 1572 else 1573 usage_with_options(kvm_usage, kvm_options); 1574 1575 return 0; 1576 } 1577