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