1 // SPDX-License-Identifier: GPL-2.0 2 #include "builtin.h" 3 #include "perf.h" 4 5 #include "util/build-id.h" 6 #include "util/evsel.h" 7 #include "util/evlist.h" 8 #include "util/mmap.h" 9 #include "util/term.h" 10 #include "util/symbol.h" 11 #include "util/thread.h" 12 #include "util/header.h" 13 #include "util/session.h" 14 #include "util/intlist.h" 15 #include <subcmd/pager.h> 16 #include <subcmd/parse-options.h> 17 #include "util/trace-event.h" 18 #include "util/debug.h" 19 #include "util/tool.h" 20 #include "util/stat.h" 21 #include "util/synthetic-events.h" 22 #include "util/top.h" 23 #include "util/data.h" 24 #include "util/ordered-events.h" 25 #include "util/kvm-stat.h" 26 #include "ui/ui.h" 27 #include "util/string2.h" 28 29 #include <sys/prctl.h> 30 #ifdef HAVE_TIMERFD_SUPPORT 31 #include <sys/timerfd.h> 32 #endif 33 #include <sys/time.h> 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 #include <fcntl.h> 37 38 #include <linux/err.h> 39 #include <linux/kernel.h> 40 #include <linux/string.h> 41 #include <linux/time64.h> 42 #include <linux/zalloc.h> 43 #include <errno.h> 44 #include <inttypes.h> 45 #include <poll.h> 46 #include <termios.h> 47 #include <semaphore.h> 48 #include <signal.h> 49 #include <math.h> 50 #include <perf/mmap.h> 51 52 static const char *get_filename_for_perf_kvm(void) 53 { 54 const char *filename; 55 56 if (perf_host && !perf_guest) 57 filename = strdup("perf.data.host"); 58 else if (!perf_host && perf_guest) 59 filename = strdup("perf.data.guest"); 60 else 61 filename = strdup("perf.data.kvm"); 62 63 return filename; 64 } 65 66 #ifdef HAVE_KVM_STAT_SUPPORT 67 68 void exit_event_get_key(struct evsel *evsel, 69 struct perf_sample *sample, 70 struct event_key *key) 71 { 72 key->info = 0; 73 key->key = evsel__intval(evsel, sample, kvm_exit_reason); 74 } 75 76 bool kvm_exit_event(struct evsel *evsel) 77 { 78 return !strcmp(evsel->name, kvm_exit_trace); 79 } 80 81 bool exit_event_begin(struct evsel *evsel, 82 struct perf_sample *sample, struct event_key *key) 83 { 84 if (kvm_exit_event(evsel)) { 85 exit_event_get_key(evsel, sample, key); 86 return true; 87 } 88 89 return false; 90 } 91 92 bool kvm_entry_event(struct evsel *evsel) 93 { 94 return !strcmp(evsel->name, kvm_entry_trace); 95 } 96 97 bool exit_event_end(struct evsel *evsel, 98 struct perf_sample *sample __maybe_unused, 99 struct event_key *key __maybe_unused) 100 { 101 return kvm_entry_event(evsel); 102 } 103 104 static const char *get_exit_reason(struct perf_kvm_stat *kvm, 105 struct exit_reasons_table *tbl, 106 u64 exit_code) 107 { 108 while (tbl->reason != NULL) { 109 if (tbl->exit_code == exit_code) 110 return tbl->reason; 111 tbl++; 112 } 113 114 pr_err("unknown kvm exit code:%lld on %s\n", 115 (unsigned long long)exit_code, kvm->exit_reasons_isa); 116 return "UNKNOWN"; 117 } 118 119 void exit_event_decode_key(struct perf_kvm_stat *kvm, 120 struct event_key *key, 121 char *decode) 122 { 123 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons, 124 key->key); 125 126 scnprintf(decode, decode_str_len, "%s", exit_reason); 127 } 128 129 static bool register_kvm_events_ops(struct perf_kvm_stat *kvm) 130 { 131 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops; 132 133 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) { 134 if (!strcmp(events_ops->name, kvm->report_event)) { 135 kvm->events_ops = events_ops->ops; 136 return true; 137 } 138 } 139 140 return false; 141 } 142 143 struct vcpu_event_record { 144 int vcpu_id; 145 u64 start_time; 146 struct kvm_event *last_event; 147 }; 148 149 150 static void init_kvm_event_record(struct perf_kvm_stat *kvm) 151 { 152 unsigned int i; 153 154 for (i = 0; i < EVENTS_CACHE_SIZE; i++) 155 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]); 156 } 157 158 #ifdef HAVE_TIMERFD_SUPPORT 159 static void clear_events_cache_stats(struct list_head *kvm_events_cache) 160 { 161 struct list_head *head; 162 struct kvm_event *event; 163 unsigned int i; 164 int j; 165 166 for (i = 0; i < EVENTS_CACHE_SIZE; i++) { 167 head = &kvm_events_cache[i]; 168 list_for_each_entry(event, head, hash_entry) { 169 /* reset stats for event */ 170 event->total.time = 0; 171 init_stats(&event->total.stats); 172 173 for (j = 0; j < event->max_vcpu; ++j) { 174 event->vcpu[j].time = 0; 175 init_stats(&event->vcpu[j].stats); 176 } 177 } 178 } 179 } 180 #endif 181 182 static int kvm_events_hash_fn(u64 key) 183 { 184 return key & (EVENTS_CACHE_SIZE - 1); 185 } 186 187 static bool kvm_event_expand(struct kvm_event *event, int vcpu_id) 188 { 189 int old_max_vcpu = event->max_vcpu; 190 void *prev; 191 192 if (vcpu_id < event->max_vcpu) 193 return true; 194 195 while (event->max_vcpu <= vcpu_id) 196 event->max_vcpu += DEFAULT_VCPU_NUM; 197 198 prev = event->vcpu; 199 event->vcpu = realloc(event->vcpu, 200 event->max_vcpu * sizeof(*event->vcpu)); 201 if (!event->vcpu) { 202 free(prev); 203 pr_err("Not enough memory\n"); 204 return false; 205 } 206 207 memset(event->vcpu + old_max_vcpu, 0, 208 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu)); 209 return true; 210 } 211 212 static struct kvm_event *kvm_alloc_init_event(struct event_key *key) 213 { 214 struct kvm_event *event; 215 216 event = zalloc(sizeof(*event)); 217 if (!event) { 218 pr_err("Not enough memory\n"); 219 return NULL; 220 } 221 222 event->key = *key; 223 init_stats(&event->total.stats); 224 return event; 225 } 226 227 static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm, 228 struct event_key *key) 229 { 230 struct kvm_event *event; 231 struct list_head *head; 232 233 BUG_ON(key->key == INVALID_KEY); 234 235 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)]; 236 list_for_each_entry(event, head, hash_entry) { 237 if (event->key.key == key->key && event->key.info == key->info) 238 return event; 239 } 240 241 event = kvm_alloc_init_event(key); 242 if (!event) 243 return NULL; 244 245 list_add(&event->hash_entry, head); 246 return event; 247 } 248 249 static bool handle_begin_event(struct perf_kvm_stat *kvm, 250 struct vcpu_event_record *vcpu_record, 251 struct event_key *key, u64 timestamp) 252 { 253 struct kvm_event *event = NULL; 254 255 if (key->key != INVALID_KEY) 256 event = find_create_kvm_event(kvm, key); 257 258 vcpu_record->last_event = event; 259 vcpu_record->start_time = timestamp; 260 return true; 261 } 262 263 static void 264 kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff) 265 { 266 kvm_stats->time += time_diff; 267 update_stats(&kvm_stats->stats, time_diff); 268 } 269 270 static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event) 271 { 272 struct kvm_event_stats *kvm_stats = &event->total; 273 274 if (vcpu_id != -1) 275 kvm_stats = &event->vcpu[vcpu_id]; 276 277 return rel_stddev_stats(stddev_stats(&kvm_stats->stats), 278 avg_stats(&kvm_stats->stats)); 279 } 280 281 static bool update_kvm_event(struct kvm_event *event, int vcpu_id, 282 u64 time_diff) 283 { 284 if (vcpu_id == -1) { 285 kvm_update_event_stats(&event->total, time_diff); 286 return true; 287 } 288 289 if (!kvm_event_expand(event, vcpu_id)) 290 return false; 291 292 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff); 293 return true; 294 } 295 296 static bool is_child_event(struct perf_kvm_stat *kvm, 297 struct evsel *evsel, 298 struct perf_sample *sample, 299 struct event_key *key) 300 { 301 struct child_event_ops *child_ops; 302 303 child_ops = kvm->events_ops->child_ops; 304 305 if (!child_ops) 306 return false; 307 308 for (; child_ops->name; child_ops++) { 309 if (!strcmp(evsel->name, child_ops->name)) { 310 child_ops->get_key(evsel, sample, key); 311 return true; 312 } 313 } 314 315 return false; 316 } 317 318 static bool handle_child_event(struct perf_kvm_stat *kvm, 319 struct vcpu_event_record *vcpu_record, 320 struct event_key *key, 321 struct perf_sample *sample __maybe_unused) 322 { 323 struct kvm_event *event = NULL; 324 325 if (key->key != INVALID_KEY) 326 event = find_create_kvm_event(kvm, key); 327 328 vcpu_record->last_event = event; 329 330 return true; 331 } 332 333 static bool skip_event(const char *event) 334 { 335 const char * const *skip_events; 336 337 for (skip_events = kvm_skip_events; *skip_events; skip_events++) 338 if (!strcmp(event, *skip_events)) 339 return true; 340 341 return false; 342 } 343 344 static bool handle_end_event(struct perf_kvm_stat *kvm, 345 struct vcpu_event_record *vcpu_record, 346 struct event_key *key, 347 struct perf_sample *sample) 348 { 349 struct kvm_event *event; 350 u64 time_begin, time_diff; 351 int vcpu; 352 353 if (kvm->trace_vcpu == -1) 354 vcpu = -1; 355 else 356 vcpu = vcpu_record->vcpu_id; 357 358 event = vcpu_record->last_event; 359 time_begin = vcpu_record->start_time; 360 361 /* The begin event is not caught. */ 362 if (!time_begin) 363 return true; 364 365 /* 366 * In some case, the 'begin event' only records the start timestamp, 367 * the actual event is recognized in the 'end event' (e.g. mmio-event). 368 */ 369 370 /* Both begin and end events did not get the key. */ 371 if (!event && key->key == INVALID_KEY) 372 return true; 373 374 if (!event) 375 event = find_create_kvm_event(kvm, key); 376 377 if (!event) 378 return false; 379 380 vcpu_record->last_event = NULL; 381 vcpu_record->start_time = 0; 382 383 /* seems to happen once in a while during live mode */ 384 if (sample->time < time_begin) { 385 pr_debug("End time before begin time; skipping event.\n"); 386 return true; 387 } 388 389 time_diff = sample->time - time_begin; 390 391 if (kvm->duration && time_diff > kvm->duration) { 392 char decode[decode_str_len]; 393 394 kvm->events_ops->decode_key(kvm, &event->key, decode); 395 if (!skip_event(decode)) { 396 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n", 397 sample->time, sample->pid, vcpu_record->vcpu_id, 398 decode, time_diff / NSEC_PER_USEC); 399 } 400 } 401 402 return update_kvm_event(event, vcpu, time_diff); 403 } 404 405 static 406 struct vcpu_event_record *per_vcpu_record(struct thread *thread, 407 struct evsel *evsel, 408 struct perf_sample *sample) 409 { 410 /* Only kvm_entry records vcpu id. */ 411 if (!thread__priv(thread) && kvm_entry_event(evsel)) { 412 struct vcpu_event_record *vcpu_record; 413 414 vcpu_record = zalloc(sizeof(*vcpu_record)); 415 if (!vcpu_record) { 416 pr_err("%s: Not enough memory\n", __func__); 417 return NULL; 418 } 419 420 vcpu_record->vcpu_id = evsel__intval(evsel, sample, vcpu_id_str); 421 thread__set_priv(thread, vcpu_record); 422 } 423 424 return thread__priv(thread); 425 } 426 427 static bool handle_kvm_event(struct perf_kvm_stat *kvm, 428 struct thread *thread, 429 struct evsel *evsel, 430 struct perf_sample *sample) 431 { 432 struct vcpu_event_record *vcpu_record; 433 struct event_key key = { .key = INVALID_KEY, 434 .exit_reasons = kvm->exit_reasons }; 435 436 vcpu_record = per_vcpu_record(thread, evsel, sample); 437 if (!vcpu_record) 438 return true; 439 440 /* only process events for vcpus user cares about */ 441 if ((kvm->trace_vcpu != -1) && 442 (kvm->trace_vcpu != vcpu_record->vcpu_id)) 443 return true; 444 445 if (kvm->events_ops->is_begin_event(evsel, sample, &key)) 446 return handle_begin_event(kvm, vcpu_record, &key, sample->time); 447 448 if (is_child_event(kvm, evsel, sample, &key)) 449 return handle_child_event(kvm, vcpu_record, &key, sample); 450 451 if (kvm->events_ops->is_end_event(evsel, sample, &key)) 452 return handle_end_event(kvm, vcpu_record, &key, sample); 453 454 return true; 455 } 456 457 #define GET_EVENT_KEY(func, field) \ 458 static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \ 459 { \ 460 if (vcpu == -1) \ 461 return event->total.field; \ 462 \ 463 if (vcpu >= event->max_vcpu) \ 464 return 0; \ 465 \ 466 return event->vcpu[vcpu].field; \ 467 } 468 469 #define COMPARE_EVENT_KEY(func, field) \ 470 GET_EVENT_KEY(func, field) \ 471 static int compare_kvm_event_ ## func(struct kvm_event *one, \ 472 struct kvm_event *two, int vcpu)\ 473 { \ 474 return get_event_ ##func(one, vcpu) > \ 475 get_event_ ##func(two, vcpu); \ 476 } 477 478 GET_EVENT_KEY(time, time); 479 COMPARE_EVENT_KEY(count, stats.n); 480 COMPARE_EVENT_KEY(mean, stats.mean); 481 GET_EVENT_KEY(max, stats.max); 482 GET_EVENT_KEY(min, stats.min); 483 484 #define DEF_SORT_NAME_KEY(name, compare_key) \ 485 { #name, compare_kvm_event_ ## compare_key } 486 487 static struct kvm_event_key keys[] = { 488 DEF_SORT_NAME_KEY(sample, count), 489 DEF_SORT_NAME_KEY(time, mean), 490 { NULL, NULL } 491 }; 492 493 static bool select_key(struct perf_kvm_stat *kvm) 494 { 495 int i; 496 497 for (i = 0; keys[i].name; i++) { 498 if (!strcmp(keys[i].name, kvm->sort_key)) { 499 kvm->compare = keys[i].key; 500 return true; 501 } 502 } 503 504 pr_err("Unknown compare key:%s\n", kvm->sort_key); 505 return false; 506 } 507 508 static void insert_to_result(struct rb_root *result, struct kvm_event *event, 509 key_cmp_fun bigger, int vcpu) 510 { 511 struct rb_node **rb = &result->rb_node; 512 struct rb_node *parent = NULL; 513 struct kvm_event *p; 514 515 while (*rb) { 516 p = container_of(*rb, struct kvm_event, rb); 517 parent = *rb; 518 519 if (bigger(event, p, vcpu)) 520 rb = &(*rb)->rb_left; 521 else 522 rb = &(*rb)->rb_right; 523 } 524 525 rb_link_node(&event->rb, parent, rb); 526 rb_insert_color(&event->rb, result); 527 } 528 529 static void 530 update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event) 531 { 532 int vcpu = kvm->trace_vcpu; 533 534 kvm->total_count += get_event_count(event, vcpu); 535 kvm->total_time += get_event_time(event, vcpu); 536 } 537 538 static bool event_is_valid(struct kvm_event *event, int vcpu) 539 { 540 return !!get_event_count(event, vcpu); 541 } 542 543 static void sort_result(struct perf_kvm_stat *kvm) 544 { 545 unsigned int i; 546 int vcpu = kvm->trace_vcpu; 547 struct kvm_event *event; 548 549 for (i = 0; i < EVENTS_CACHE_SIZE; i++) { 550 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) { 551 if (event_is_valid(event, vcpu)) { 552 update_total_count(kvm, event); 553 insert_to_result(&kvm->result, event, 554 kvm->compare, vcpu); 555 } 556 } 557 } 558 } 559 560 /* returns left most element of result, and erase it */ 561 static struct kvm_event *pop_from_result(struct rb_root *result) 562 { 563 struct rb_node *node = rb_first(result); 564 565 if (!node) 566 return NULL; 567 568 rb_erase(node, result); 569 return container_of(node, struct kvm_event, rb); 570 } 571 572 static void print_vcpu_info(struct perf_kvm_stat *kvm) 573 { 574 int vcpu = kvm->trace_vcpu; 575 576 pr_info("Analyze events for "); 577 578 if (kvm->opts.target.system_wide) 579 pr_info("all VMs, "); 580 else if (kvm->opts.target.pid) 581 pr_info("pid(s) %s, ", kvm->opts.target.pid); 582 else 583 pr_info("dazed and confused on what is monitored, "); 584 585 if (vcpu == -1) 586 pr_info("all VCPUs:\n\n"); 587 else 588 pr_info("VCPU %d:\n\n", vcpu); 589 } 590 591 static void show_timeofday(void) 592 { 593 char date[64]; 594 struct timeval tv; 595 struct tm ltime; 596 597 gettimeofday(&tv, NULL); 598 if (localtime_r(&tv.tv_sec, <ime)) { 599 strftime(date, sizeof(date), "%H:%M:%S", <ime); 600 pr_info("%s.%06ld", date, tv.tv_usec); 601 } else 602 pr_info("00:00:00.000000"); 603 604 return; 605 } 606 607 static void print_result(struct perf_kvm_stat *kvm) 608 { 609 char decode[decode_str_len]; 610 struct kvm_event *event; 611 int vcpu = kvm->trace_vcpu; 612 613 if (kvm->live) { 614 puts(CONSOLE_CLEAR); 615 show_timeofday(); 616 } 617 618 pr_info("\n\n"); 619 print_vcpu_info(kvm); 620 pr_info("%*s ", decode_str_len, kvm->events_ops->name); 621 pr_info("%10s ", "Samples"); 622 pr_info("%9s ", "Samples%"); 623 624 pr_info("%9s ", "Time%"); 625 pr_info("%11s ", "Min Time"); 626 pr_info("%11s ", "Max Time"); 627 pr_info("%16s ", "Avg time"); 628 pr_info("\n\n"); 629 630 while ((event = pop_from_result(&kvm->result))) { 631 u64 ecount, etime, max, min; 632 633 ecount = get_event_count(event, vcpu); 634 etime = get_event_time(event, vcpu); 635 max = get_event_max(event, vcpu); 636 min = get_event_min(event, vcpu); 637 638 kvm->events_ops->decode_key(kvm, &event->key, decode); 639 pr_info("%*s ", decode_str_len, decode); 640 pr_info("%10llu ", (unsigned long long)ecount); 641 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100); 642 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100); 643 pr_info("%9.2fus ", (double)min / NSEC_PER_USEC); 644 pr_info("%9.2fus ", (double)max / NSEC_PER_USEC); 645 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount / NSEC_PER_USEC, 646 kvm_event_rel_stddev(vcpu, event)); 647 pr_info("\n"); 648 } 649 650 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n", 651 kvm->total_count, kvm->total_time / (double)NSEC_PER_USEC); 652 653 if (kvm->lost_events) 654 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events); 655 } 656 657 #ifdef HAVE_TIMERFD_SUPPORT 658 static int process_lost_event(struct perf_tool *tool, 659 union perf_event *event __maybe_unused, 660 struct perf_sample *sample __maybe_unused, 661 struct machine *machine __maybe_unused) 662 { 663 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool); 664 665 kvm->lost_events++; 666 return 0; 667 } 668 #endif 669 670 static bool skip_sample(struct perf_kvm_stat *kvm, 671 struct perf_sample *sample) 672 { 673 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL) 674 return true; 675 676 return false; 677 } 678 679 static int process_sample_event(struct perf_tool *tool, 680 union perf_event *event, 681 struct perf_sample *sample, 682 struct evsel *evsel, 683 struct machine *machine) 684 { 685 int err = 0; 686 struct thread *thread; 687 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, 688 tool); 689 690 if (skip_sample(kvm, sample)) 691 return 0; 692 693 thread = machine__findnew_thread(machine, sample->pid, sample->tid); 694 if (thread == NULL) { 695 pr_debug("problem processing %d event, skipping it.\n", 696 event->header.type); 697 return -1; 698 } 699 700 if (!handle_kvm_event(kvm, thread, evsel, sample)) 701 err = -1; 702 703 thread__put(thread); 704 return err; 705 } 706 707 static int cpu_isa_config(struct perf_kvm_stat *kvm) 708 { 709 char buf[128], *cpuid; 710 int err; 711 712 if (kvm->live) { 713 err = get_cpuid(buf, sizeof(buf)); 714 if (err != 0) { 715 pr_err("Failed to look up CPU type: %s\n", 716 str_error_r(err, buf, sizeof(buf))); 717 return -err; 718 } 719 cpuid = buf; 720 } else 721 cpuid = kvm->session->header.env.cpuid; 722 723 if (!cpuid) { 724 pr_err("Failed to look up CPU type\n"); 725 return -EINVAL; 726 } 727 728 err = cpu_isa_init(kvm, cpuid); 729 if (err == -ENOTSUP) 730 pr_err("CPU %s is not supported.\n", cpuid); 731 732 return err; 733 } 734 735 static bool verify_vcpu(int vcpu) 736 { 737 if (vcpu != -1 && vcpu < 0) { 738 pr_err("Invalid vcpu:%d.\n", vcpu); 739 return false; 740 } 741 742 return true; 743 } 744 745 #ifdef HAVE_TIMERFD_SUPPORT 746 /* keeping the max events to a modest level to keep 747 * the processing of samples per mmap smooth. 748 */ 749 #define PERF_KVM__MAX_EVENTS_PER_MMAP 25 750 751 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx, 752 u64 *mmap_time) 753 { 754 struct evlist *evlist = kvm->evlist; 755 union perf_event *event; 756 struct mmap *md; 757 u64 timestamp; 758 s64 n = 0; 759 int err; 760 761 *mmap_time = ULLONG_MAX; 762 md = &evlist->mmap[idx]; 763 err = perf_mmap__read_init(&md->core); 764 if (err < 0) 765 return (err == -EAGAIN) ? 0 : -1; 766 767 while ((event = perf_mmap__read_event(&md->core)) != NULL) { 768 err = evlist__parse_sample_timestamp(evlist, event, ×tamp); 769 if (err) { 770 perf_mmap__consume(&md->core); 771 pr_err("Failed to parse sample\n"); 772 return -1; 773 } 774 775 err = perf_session__queue_event(kvm->session, event, timestamp, 0, NULL); 776 /* 777 * FIXME: Here we can't consume the event, as perf_session__queue_event will 778 * point to it, and it'll get possibly overwritten by the kernel. 779 */ 780 perf_mmap__consume(&md->core); 781 782 if (err) { 783 pr_err("Failed to enqueue sample: %d\n", err); 784 return -1; 785 } 786 787 /* save time stamp of our first sample for this mmap */ 788 if (n == 0) 789 *mmap_time = timestamp; 790 791 /* limit events per mmap handled all at once */ 792 n++; 793 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP) 794 break; 795 } 796 797 perf_mmap__read_done(&md->core); 798 return n; 799 } 800 801 static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm) 802 { 803 int i, err, throttled = 0; 804 s64 n, ntotal = 0; 805 u64 flush_time = ULLONG_MAX, mmap_time; 806 807 for (i = 0; i < kvm->evlist->core.nr_mmaps; i++) { 808 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time); 809 if (n < 0) 810 return -1; 811 812 /* flush time is going to be the minimum of all the individual 813 * mmap times. Essentially, we flush all the samples queued up 814 * from the last pass under our minimal start time -- that leaves 815 * a very small race for samples to come in with a lower timestamp. 816 * The ioctl to return the perf_clock timestamp should close the 817 * race entirely. 818 */ 819 if (mmap_time < flush_time) 820 flush_time = mmap_time; 821 822 ntotal += n; 823 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP) 824 throttled = 1; 825 } 826 827 /* flush queue after each round in which we processed events */ 828 if (ntotal) { 829 struct ordered_events *oe = &kvm->session->ordered_events; 830 831 oe->next_flush = flush_time; 832 err = ordered_events__flush(oe, OE_FLUSH__ROUND); 833 if (err) { 834 if (kvm->lost_events) 835 pr_info("\nLost events: %" PRIu64 "\n\n", 836 kvm->lost_events); 837 return err; 838 } 839 } 840 841 return throttled; 842 } 843 844 static volatile int done; 845 846 static void sig_handler(int sig __maybe_unused) 847 { 848 done = 1; 849 } 850 851 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm) 852 { 853 struct itimerspec new_value; 854 int rc = -1; 855 856 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK); 857 if (kvm->timerfd < 0) { 858 pr_err("timerfd_create failed\n"); 859 goto out; 860 } 861 862 new_value.it_value.tv_sec = kvm->display_time; 863 new_value.it_value.tv_nsec = 0; 864 new_value.it_interval.tv_sec = kvm->display_time; 865 new_value.it_interval.tv_nsec = 0; 866 867 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) { 868 pr_err("timerfd_settime failed: %d\n", errno); 869 close(kvm->timerfd); 870 goto out; 871 } 872 873 rc = 0; 874 out: 875 return rc; 876 } 877 878 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm) 879 { 880 uint64_t c; 881 int rc; 882 883 rc = read(kvm->timerfd, &c, sizeof(uint64_t)); 884 if (rc < 0) { 885 if (errno == EAGAIN) 886 return 0; 887 888 pr_err("Failed to read timer fd: %d\n", errno); 889 return -1; 890 } 891 892 if (rc != sizeof(uint64_t)) { 893 pr_err("Error reading timer fd - invalid size returned\n"); 894 return -1; 895 } 896 897 if (c != 1) 898 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1); 899 900 /* update display */ 901 sort_result(kvm); 902 print_result(kvm); 903 904 /* reset counts */ 905 clear_events_cache_stats(kvm->kvm_events_cache); 906 kvm->total_count = 0; 907 kvm->total_time = 0; 908 kvm->lost_events = 0; 909 910 return 0; 911 } 912 913 static int fd_set_nonblock(int fd) 914 { 915 long arg = 0; 916 917 arg = fcntl(fd, F_GETFL); 918 if (arg < 0) { 919 pr_err("Failed to get current flags for fd %d\n", fd); 920 return -1; 921 } 922 923 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) { 924 pr_err("Failed to set non-block option on fd %d\n", fd); 925 return -1; 926 } 927 928 return 0; 929 } 930 931 static int perf_kvm__handle_stdin(void) 932 { 933 int c; 934 935 c = getc(stdin); 936 if (c == 'q') 937 return 1; 938 939 return 0; 940 } 941 942 static int kvm_events_live_report(struct perf_kvm_stat *kvm) 943 { 944 int nr_stdin, ret, err = -EINVAL; 945 struct termios save; 946 947 /* live flag must be set first */ 948 kvm->live = true; 949 950 ret = cpu_isa_config(kvm); 951 if (ret < 0) 952 return ret; 953 954 if (!verify_vcpu(kvm->trace_vcpu) || 955 !select_key(kvm) || 956 !register_kvm_events_ops(kvm)) { 957 goto out; 958 } 959 960 set_term_quiet_input(&save); 961 init_kvm_event_record(kvm); 962 963 signal(SIGINT, sig_handler); 964 signal(SIGTERM, sig_handler); 965 966 /* add timer fd */ 967 if (perf_kvm__timerfd_create(kvm) < 0) { 968 err = -1; 969 goto out; 970 } 971 972 if (evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0) 973 goto out; 974 975 nr_stdin = evlist__add_pollfd(kvm->evlist, fileno(stdin)); 976 if (nr_stdin < 0) 977 goto out; 978 979 if (fd_set_nonblock(fileno(stdin)) != 0) 980 goto out; 981 982 /* everything is good - enable the events and process */ 983 evlist__enable(kvm->evlist); 984 985 while (!done) { 986 struct fdarray *fda = &kvm->evlist->core.pollfd; 987 int rc; 988 989 rc = perf_kvm__mmap_read(kvm); 990 if (rc < 0) 991 break; 992 993 err = perf_kvm__handle_timerfd(kvm); 994 if (err) 995 goto out; 996 997 if (fda->entries[nr_stdin].revents & POLLIN) 998 done = perf_kvm__handle_stdin(); 999 1000 if (!rc && !done) 1001 err = evlist__poll(kvm->evlist, 100); 1002 } 1003 1004 evlist__disable(kvm->evlist); 1005 1006 if (err == 0) { 1007 sort_result(kvm); 1008 print_result(kvm); 1009 } 1010 1011 out: 1012 if (kvm->timerfd >= 0) 1013 close(kvm->timerfd); 1014 1015 tcsetattr(0, TCSAFLUSH, &save); 1016 return err; 1017 } 1018 1019 static int kvm_live_open_events(struct perf_kvm_stat *kvm) 1020 { 1021 int err, rc = -1; 1022 struct evsel *pos; 1023 struct evlist *evlist = kvm->evlist; 1024 char sbuf[STRERR_BUFSIZE]; 1025 1026 evlist__config(evlist, &kvm->opts, NULL); 1027 1028 /* 1029 * Note: exclude_{guest,host} do not apply here. 1030 * This command processes KVM tracepoints from host only 1031 */ 1032 evlist__for_each_entry(evlist, pos) { 1033 struct perf_event_attr *attr = &pos->core.attr; 1034 1035 /* make sure these *are* set */ 1036 evsel__set_sample_bit(pos, TID); 1037 evsel__set_sample_bit(pos, TIME); 1038 evsel__set_sample_bit(pos, CPU); 1039 evsel__set_sample_bit(pos, RAW); 1040 /* make sure these are *not*; want as small a sample as possible */ 1041 evsel__reset_sample_bit(pos, PERIOD); 1042 evsel__reset_sample_bit(pos, IP); 1043 evsel__reset_sample_bit(pos, CALLCHAIN); 1044 evsel__reset_sample_bit(pos, ADDR); 1045 evsel__reset_sample_bit(pos, READ); 1046 attr->mmap = 0; 1047 attr->comm = 0; 1048 attr->task = 0; 1049 1050 attr->sample_period = 1; 1051 1052 attr->watermark = 0; 1053 attr->wakeup_events = 1000; 1054 1055 /* will enable all once we are ready */ 1056 attr->disabled = 1; 1057 } 1058 1059 err = evlist__open(evlist); 1060 if (err < 0) { 1061 printf("Couldn't create the events: %s\n", 1062 str_error_r(errno, sbuf, sizeof(sbuf))); 1063 goto out; 1064 } 1065 1066 if (evlist__mmap(evlist, kvm->opts.mmap_pages) < 0) { 1067 ui__error("Failed to mmap the events: %s\n", 1068 str_error_r(errno, sbuf, sizeof(sbuf))); 1069 evlist__close(evlist); 1070 goto out; 1071 } 1072 1073 rc = 0; 1074 1075 out: 1076 return rc; 1077 } 1078 #endif 1079 1080 static int read_events(struct perf_kvm_stat *kvm) 1081 { 1082 int ret; 1083 1084 struct perf_tool eops = { 1085 .sample = process_sample_event, 1086 .comm = perf_event__process_comm, 1087 .namespaces = perf_event__process_namespaces, 1088 .ordered_events = true, 1089 }; 1090 struct perf_data file = { 1091 .path = kvm->file_name, 1092 .mode = PERF_DATA_MODE_READ, 1093 .force = kvm->force, 1094 }; 1095 1096 kvm->tool = eops; 1097 kvm->session = perf_session__new(&file, &kvm->tool); 1098 if (IS_ERR(kvm->session)) { 1099 pr_err("Initializing perf session failed\n"); 1100 return PTR_ERR(kvm->session); 1101 } 1102 1103 symbol__init(&kvm->session->header.env); 1104 1105 if (!perf_session__has_traces(kvm->session, "kvm record")) { 1106 ret = -EINVAL; 1107 goto out_delete; 1108 } 1109 1110 /* 1111 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not 1112 * traced in the old kernel. 1113 */ 1114 ret = cpu_isa_config(kvm); 1115 if (ret < 0) 1116 goto out_delete; 1117 1118 ret = perf_session__process_events(kvm->session); 1119 1120 out_delete: 1121 perf_session__delete(kvm->session); 1122 return ret; 1123 } 1124 1125 static int parse_target_str(struct perf_kvm_stat *kvm) 1126 { 1127 if (kvm->opts.target.pid) { 1128 kvm->pid_list = intlist__new(kvm->opts.target.pid); 1129 if (kvm->pid_list == NULL) { 1130 pr_err("Error parsing process id string\n"); 1131 return -EINVAL; 1132 } 1133 } 1134 1135 return 0; 1136 } 1137 1138 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm) 1139 { 1140 int ret = -EINVAL; 1141 int vcpu = kvm->trace_vcpu; 1142 1143 if (parse_target_str(kvm) != 0) 1144 goto exit; 1145 1146 if (!verify_vcpu(vcpu)) 1147 goto exit; 1148 1149 if (!select_key(kvm)) 1150 goto exit; 1151 1152 if (!register_kvm_events_ops(kvm)) 1153 goto exit; 1154 1155 init_kvm_event_record(kvm); 1156 setup_pager(); 1157 1158 ret = read_events(kvm); 1159 if (ret) 1160 goto exit; 1161 1162 sort_result(kvm); 1163 print_result(kvm); 1164 1165 exit: 1166 return ret; 1167 } 1168 1169 #define STRDUP_FAIL_EXIT(s) \ 1170 ({ char *_p; \ 1171 _p = strdup(s); \ 1172 if (!_p) \ 1173 return -ENOMEM; \ 1174 _p; \ 1175 }) 1176 1177 int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused) 1178 { 1179 return 0; 1180 } 1181 1182 static int 1183 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv) 1184 { 1185 unsigned int rec_argc, i, j, events_tp_size; 1186 const char **rec_argv; 1187 const char * const record_args[] = { 1188 "record", 1189 "-R", 1190 "-m", "1024", 1191 "-c", "1", 1192 }; 1193 const char * const kvm_stat_record_usage[] = { 1194 "perf kvm stat record [<options>]", 1195 NULL 1196 }; 1197 const char * const *events_tp; 1198 int ret; 1199 1200 events_tp_size = 0; 1201 ret = setup_kvm_events_tp(kvm); 1202 if (ret < 0) { 1203 pr_err("Unable to setup the kvm tracepoints\n"); 1204 return ret; 1205 } 1206 1207 for (events_tp = kvm_events_tp; *events_tp; events_tp++) 1208 events_tp_size++; 1209 1210 rec_argc = ARRAY_SIZE(record_args) + argc + 2 + 1211 2 * events_tp_size; 1212 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1213 1214 if (rec_argv == NULL) 1215 return -ENOMEM; 1216 1217 for (i = 0; i < ARRAY_SIZE(record_args); i++) 1218 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]); 1219 1220 for (j = 0; j < events_tp_size; j++) { 1221 rec_argv[i++] = "-e"; 1222 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]); 1223 } 1224 1225 rec_argv[i++] = STRDUP_FAIL_EXIT("-o"); 1226 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name); 1227 1228 for (j = 1; j < (unsigned int)argc; j++, i++) 1229 rec_argv[i] = argv[j]; 1230 1231 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN); 1232 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN); 1233 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN); 1234 1235 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED); 1236 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED); 1237 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED); 1238 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED); 1239 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED); 1240 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED); 1241 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED); 1242 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED); 1243 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED); 1244 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED); 1245 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED); 1246 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED); 1247 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED); 1248 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED); 1249 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED); 1250 1251 record_usage = kvm_stat_record_usage; 1252 return cmd_record(i, rec_argv); 1253 } 1254 1255 static int 1256 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv) 1257 { 1258 const struct option kvm_events_report_options[] = { 1259 OPT_STRING(0, "event", &kvm->report_event, "report event", 1260 "event for reporting: vmexit, " 1261 "mmio (x86 only), ioport (x86 only)"), 1262 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu, 1263 "vcpu id to report"), 1264 OPT_STRING('k', "key", &kvm->sort_key, "sort-key", 1265 "key for sorting: sample(sort by samples number)" 1266 " time (sort by avg time)"), 1267 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid", 1268 "analyze events only for given process id(s)"), 1269 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"), 1270 OPT_END() 1271 }; 1272 1273 const char * const kvm_events_report_usage[] = { 1274 "perf kvm stat report [<options>]", 1275 NULL 1276 }; 1277 1278 if (argc) { 1279 argc = parse_options(argc, argv, 1280 kvm_events_report_options, 1281 kvm_events_report_usage, 0); 1282 if (argc) 1283 usage_with_options(kvm_events_report_usage, 1284 kvm_events_report_options); 1285 } 1286 1287 if (!kvm->opts.target.pid) 1288 kvm->opts.target.system_wide = true; 1289 1290 return kvm_events_report_vcpu(kvm); 1291 } 1292 1293 #ifdef HAVE_TIMERFD_SUPPORT 1294 static struct evlist *kvm_live_event_list(void) 1295 { 1296 struct evlist *evlist; 1297 char *tp, *name, *sys; 1298 int err = -1; 1299 const char * const *events_tp; 1300 1301 evlist = evlist__new(); 1302 if (evlist == NULL) 1303 return NULL; 1304 1305 for (events_tp = kvm_events_tp; *events_tp; events_tp++) { 1306 1307 tp = strdup(*events_tp); 1308 if (tp == NULL) 1309 goto out; 1310 1311 /* split tracepoint into subsystem and name */ 1312 sys = tp; 1313 name = strchr(tp, ':'); 1314 if (name == NULL) { 1315 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n", 1316 *events_tp); 1317 free(tp); 1318 goto out; 1319 } 1320 *name = '\0'; 1321 name++; 1322 1323 if (evlist__add_newtp(evlist, sys, name, NULL)) { 1324 pr_err("Failed to add %s tracepoint to the list\n", *events_tp); 1325 free(tp); 1326 goto out; 1327 } 1328 1329 free(tp); 1330 } 1331 1332 err = 0; 1333 1334 out: 1335 if (err) { 1336 evlist__delete(evlist); 1337 evlist = NULL; 1338 } 1339 1340 return evlist; 1341 } 1342 1343 static int kvm_events_live(struct perf_kvm_stat *kvm, 1344 int argc, const char **argv) 1345 { 1346 char errbuf[BUFSIZ]; 1347 int err; 1348 1349 const struct option live_options[] = { 1350 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid", 1351 "record events on existing process id"), 1352 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages", 1353 "number of mmap data pages", evlist__parse_mmap_pages), 1354 OPT_INCR('v', "verbose", &verbose, 1355 "be more verbose (show counter open errors, etc)"), 1356 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide, 1357 "system-wide collection from all CPUs"), 1358 OPT_UINTEGER('d', "display", &kvm->display_time, 1359 "time in seconds between display updates"), 1360 OPT_STRING(0, "event", &kvm->report_event, "report event", 1361 "event for reporting: " 1362 "vmexit, mmio (x86 only), ioport (x86 only)"), 1363 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu, 1364 "vcpu id to report"), 1365 OPT_STRING('k', "key", &kvm->sort_key, "sort-key", 1366 "key for sorting: sample(sort by samples number)" 1367 " time (sort by avg time)"), 1368 OPT_U64(0, "duration", &kvm->duration, 1369 "show events other than" 1370 " HLT (x86 only) or Wait state (s390 only)" 1371 " that take longer than duration usecs"), 1372 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 1373 "per thread proc mmap processing timeout in ms"), 1374 OPT_END() 1375 }; 1376 const char * const live_usage[] = { 1377 "perf kvm stat live [<options>]", 1378 NULL 1379 }; 1380 struct perf_data data = { 1381 .mode = PERF_DATA_MODE_WRITE, 1382 }; 1383 1384 1385 /* event handling */ 1386 kvm->tool.sample = process_sample_event; 1387 kvm->tool.comm = perf_event__process_comm; 1388 kvm->tool.exit = perf_event__process_exit; 1389 kvm->tool.fork = perf_event__process_fork; 1390 kvm->tool.lost = process_lost_event; 1391 kvm->tool.namespaces = perf_event__process_namespaces; 1392 kvm->tool.ordered_events = true; 1393 perf_tool__fill_defaults(&kvm->tool); 1394 1395 /* set defaults */ 1396 kvm->display_time = 1; 1397 kvm->opts.user_interval = 1; 1398 kvm->opts.mmap_pages = 512; 1399 kvm->opts.target.uses_mmap = false; 1400 kvm->opts.target.uid_str = NULL; 1401 kvm->opts.target.uid = UINT_MAX; 1402 1403 symbol__init(NULL); 1404 disable_buildid_cache(); 1405 1406 use_browser = 0; 1407 1408 if (argc) { 1409 argc = parse_options(argc, argv, live_options, 1410 live_usage, 0); 1411 if (argc) 1412 usage_with_options(live_usage, live_options); 1413 } 1414 1415 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */ 1416 1417 /* 1418 * target related setups 1419 */ 1420 err = target__validate(&kvm->opts.target); 1421 if (err) { 1422 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ); 1423 ui__warning("%s", errbuf); 1424 } 1425 1426 if (target__none(&kvm->opts.target)) 1427 kvm->opts.target.system_wide = true; 1428 1429 1430 /* 1431 * generate the event list 1432 */ 1433 err = setup_kvm_events_tp(kvm); 1434 if (err < 0) { 1435 pr_err("Unable to setup the kvm tracepoints\n"); 1436 return err; 1437 } 1438 1439 kvm->evlist = kvm_live_event_list(); 1440 if (kvm->evlist == NULL) { 1441 err = -1; 1442 goto out; 1443 } 1444 1445 if (evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0) 1446 usage_with_options(live_usage, live_options); 1447 1448 /* 1449 * perf session 1450 */ 1451 kvm->session = perf_session__new(&data, &kvm->tool); 1452 if (IS_ERR(kvm->session)) { 1453 err = PTR_ERR(kvm->session); 1454 goto out; 1455 } 1456 kvm->session->evlist = kvm->evlist; 1457 perf_session__set_id_hdr_size(kvm->session); 1458 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true); 1459 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target, 1460 kvm->evlist->core.threads, true, false, 1); 1461 err = kvm_live_open_events(kvm); 1462 if (err) 1463 goto out; 1464 1465 err = kvm_events_live_report(kvm); 1466 1467 out: 1468 perf_session__delete(kvm->session); 1469 kvm->session = NULL; 1470 evlist__delete(kvm->evlist); 1471 1472 return err; 1473 } 1474 #endif 1475 1476 static void print_kvm_stat_usage(void) 1477 { 1478 printf("Usage: perf kvm stat <command>\n\n"); 1479 1480 printf("# Available commands:\n"); 1481 printf("\trecord: record kvm events\n"); 1482 printf("\treport: report statistical data of kvm events\n"); 1483 printf("\tlive: live reporting of statistical data of kvm events\n"); 1484 1485 printf("\nOtherwise, it is the alias of 'perf stat':\n"); 1486 } 1487 1488 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv) 1489 { 1490 struct perf_kvm_stat kvm = { 1491 .file_name = file_name, 1492 1493 .trace_vcpu = -1, 1494 .report_event = "vmexit", 1495 .sort_key = "sample", 1496 1497 }; 1498 1499 if (argc == 1) { 1500 print_kvm_stat_usage(); 1501 goto perf_stat; 1502 } 1503 1504 if (strlen(argv[1]) > 2 && strstarts("record", argv[1])) 1505 return kvm_events_record(&kvm, argc - 1, argv + 1); 1506 1507 if (strlen(argv[1]) > 2 && strstarts("report", argv[1])) 1508 return kvm_events_report(&kvm, argc - 1 , argv + 1); 1509 1510 #ifdef HAVE_TIMERFD_SUPPORT 1511 if (!strncmp(argv[1], "live", 4)) 1512 return kvm_events_live(&kvm, argc - 1 , argv + 1); 1513 #endif 1514 1515 perf_stat: 1516 return cmd_stat(argc, argv); 1517 } 1518 #endif /* HAVE_KVM_STAT_SUPPORT */ 1519 1520 int __weak kvm_add_default_arch_event(int *argc __maybe_unused, 1521 const char **argv __maybe_unused) 1522 { 1523 return 0; 1524 } 1525 1526 static int __cmd_record(const char *file_name, int argc, const char **argv) 1527 { 1528 int rec_argc, i = 0, j, ret; 1529 const char **rec_argv; 1530 1531 ret = kvm_add_default_arch_event(&argc, argv); 1532 if (ret) 1533 return -EINVAL; 1534 1535 rec_argc = argc + 2; 1536 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1537 rec_argv[i++] = strdup("record"); 1538 rec_argv[i++] = strdup("-o"); 1539 rec_argv[i++] = strdup(file_name); 1540 for (j = 1; j < argc; j++, i++) 1541 rec_argv[i] = argv[j]; 1542 1543 BUG_ON(i != rec_argc); 1544 1545 return cmd_record(i, rec_argv); 1546 } 1547 1548 static int __cmd_report(const char *file_name, int argc, const char **argv) 1549 { 1550 int rec_argc, i = 0, j; 1551 const char **rec_argv; 1552 1553 rec_argc = argc + 2; 1554 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1555 rec_argv[i++] = strdup("report"); 1556 rec_argv[i++] = strdup("-i"); 1557 rec_argv[i++] = strdup(file_name); 1558 for (j = 1; j < argc; j++, i++) 1559 rec_argv[i] = argv[j]; 1560 1561 BUG_ON(i != rec_argc); 1562 1563 return cmd_report(i, rec_argv); 1564 } 1565 1566 static int 1567 __cmd_buildid_list(const char *file_name, int argc, const char **argv) 1568 { 1569 int rec_argc, i = 0, j; 1570 const char **rec_argv; 1571 1572 rec_argc = argc + 2; 1573 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1574 rec_argv[i++] = strdup("buildid-list"); 1575 rec_argv[i++] = strdup("-i"); 1576 rec_argv[i++] = strdup(file_name); 1577 for (j = 1; j < argc; j++, i++) 1578 rec_argv[i] = argv[j]; 1579 1580 BUG_ON(i != rec_argc); 1581 1582 return cmd_buildid_list(i, rec_argv); 1583 } 1584 1585 int cmd_kvm(int argc, const char **argv) 1586 { 1587 const char *file_name = NULL; 1588 const struct option kvm_options[] = { 1589 OPT_STRING('i', "input", &file_name, "file", 1590 "Input file name"), 1591 OPT_STRING('o', "output", &file_name, "file", 1592 "Output file name"), 1593 OPT_BOOLEAN(0, "guest", &perf_guest, 1594 "Collect guest os data"), 1595 OPT_BOOLEAN(0, "host", &perf_host, 1596 "Collect host os data"), 1597 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory", 1598 "guest mount directory under which every guest os" 1599 " instance has a subdir"), 1600 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name, 1601 "file", "file saving guest os vmlinux"), 1602 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms, 1603 "file", "file saving guest os /proc/kallsyms"), 1604 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules, 1605 "file", "file saving guest os /proc/modules"), 1606 OPT_BOOLEAN(0, "guest-code", &symbol_conf.guest_code, 1607 "Guest code can be found in hypervisor process"), 1608 OPT_INCR('v', "verbose", &verbose, 1609 "be more verbose (show counter open errors, etc)"), 1610 OPT_END() 1611 }; 1612 1613 const char *const kvm_subcommands[] = { "top", "record", "report", "diff", 1614 "buildid-list", "stat", NULL }; 1615 const char *kvm_usage[] = { NULL, NULL }; 1616 1617 perf_host = 0; 1618 perf_guest = 1; 1619 1620 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage, 1621 PARSE_OPT_STOP_AT_NON_OPTION); 1622 if (!argc) 1623 usage_with_options(kvm_usage, kvm_options); 1624 1625 if (!perf_host) 1626 perf_guest = 1; 1627 1628 if (!file_name) { 1629 file_name = get_filename_for_perf_kvm(); 1630 1631 if (!file_name) { 1632 pr_err("Failed to allocate memory for filename\n"); 1633 return -ENOMEM; 1634 } 1635 } 1636 1637 if (strlen(argv[0]) > 2 && strstarts("record", argv[0])) 1638 return __cmd_record(file_name, argc, argv); 1639 else if (strlen(argv[0]) > 2 && strstarts("report", argv[0])) 1640 return __cmd_report(file_name, argc, argv); 1641 else if (strlen(argv[0]) > 2 && strstarts("diff", argv[0])) 1642 return cmd_diff(argc, argv); 1643 else if (!strcmp(argv[0], "top")) 1644 return cmd_top(argc, argv); 1645 else if (strlen(argv[0]) > 2 && strstarts("buildid-list", argv[0])) 1646 return __cmd_buildid_list(file_name, argc, argv); 1647 #ifdef HAVE_KVM_STAT_SUPPORT 1648 else if (strlen(argv[0]) > 2 && strstarts("stat", argv[0])) 1649 return kvm_cmd_stat(file_name, argc, argv); 1650 #endif 1651 else 1652 usage_with_options(kvm_usage, kvm_options); 1653 1654 return 0; 1655 } 1656