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#include "util/ordered-events.h" 22 23#include <sys/prctl.h> 24#ifdef HAVE_TIMERFD_SUPPORT 25#include <sys/timerfd.h> 26#endif 27 28#include <termios.h> 29#include <semaphore.h> 30#include <pthread.h> 31#include <math.h> 32 33#ifdef HAVE_KVM_STAT_SUPPORT 34#include <asm/kvm_perf.h> 35#include "util/kvm-stat.h" 36 37void exit_event_get_key(struct perf_evsel *evsel, 38 struct perf_sample *sample, 39 struct event_key *key) 40{ 41 key->info = 0; 42 key->key = perf_evsel__intval(evsel, sample, KVM_EXIT_REASON); 43} 44 45bool kvm_exit_event(struct perf_evsel *evsel) 46{ 47 return !strcmp(evsel->name, KVM_EXIT_TRACE); 48} 49 50bool exit_event_begin(struct perf_evsel *evsel, 51 struct perf_sample *sample, struct event_key *key) 52{ 53 if (kvm_exit_event(evsel)) { 54 exit_event_get_key(evsel, sample, key); 55 return true; 56 } 57 58 return false; 59} 60 61bool kvm_entry_event(struct perf_evsel *evsel) 62{ 63 return !strcmp(evsel->name, KVM_ENTRY_TRACE); 64} 65 66bool exit_event_end(struct perf_evsel *evsel, 67 struct perf_sample *sample __maybe_unused, 68 struct event_key *key __maybe_unused) 69{ 70 return kvm_entry_event(evsel); 71} 72 73static const char *get_exit_reason(struct perf_kvm_stat *kvm, 74 struct exit_reasons_table *tbl, 75 u64 exit_code) 76{ 77 while (tbl->reason != NULL) { 78 if (tbl->exit_code == exit_code) 79 return tbl->reason; 80 tbl++; 81 } 82 83 pr_err("unknown kvm exit code:%lld on %s\n", 84 (unsigned long long)exit_code, kvm->exit_reasons_isa); 85 return "UNKNOWN"; 86} 87 88void exit_event_decode_key(struct perf_kvm_stat *kvm, 89 struct event_key *key, 90 char *decode) 91{ 92 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons, 93 key->key); 94 95 scnprintf(decode, DECODE_STR_LEN, "%s", exit_reason); 96} 97 98static bool register_kvm_events_ops(struct perf_kvm_stat *kvm) 99{ 100 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops; 101 102 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) { 103 if (!strcmp(events_ops->name, kvm->report_event)) { 104 kvm->events_ops = events_ops->ops; 105 return true; 106 } 107 } 108 109 return false; 110} 111 112struct vcpu_event_record { 113 int vcpu_id; 114 u64 start_time; 115 struct kvm_event *last_event; 116}; 117 118 119static void init_kvm_event_record(struct perf_kvm_stat *kvm) 120{ 121 unsigned int i; 122 123 for (i = 0; i < EVENTS_CACHE_SIZE; i++) 124 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]); 125} 126 127#ifdef HAVE_TIMERFD_SUPPORT 128static void clear_events_cache_stats(struct list_head *kvm_events_cache) 129{ 130 struct list_head *head; 131 struct kvm_event *event; 132 unsigned int i; 133 int j; 134 135 for (i = 0; i < EVENTS_CACHE_SIZE; i++) { 136 head = &kvm_events_cache[i]; 137 list_for_each_entry(event, head, hash_entry) { 138 /* reset stats for event */ 139 event->total.time = 0; 140 init_stats(&event->total.stats); 141 142 for (j = 0; j < event->max_vcpu; ++j) { 143 event->vcpu[j].time = 0; 144 init_stats(&event->vcpu[j].stats); 145 } 146 } 147 } 148} 149#endif 150 151static int kvm_events_hash_fn(u64 key) 152{ 153 return key & (EVENTS_CACHE_SIZE - 1); 154} 155 156static bool kvm_event_expand(struct kvm_event *event, int vcpu_id) 157{ 158 int old_max_vcpu = event->max_vcpu; 159 void *prev; 160 161 if (vcpu_id < event->max_vcpu) 162 return true; 163 164 while (event->max_vcpu <= vcpu_id) 165 event->max_vcpu += DEFAULT_VCPU_NUM; 166 167 prev = event->vcpu; 168 event->vcpu = realloc(event->vcpu, 169 event->max_vcpu * sizeof(*event->vcpu)); 170 if (!event->vcpu) { 171 free(prev); 172 pr_err("Not enough memory\n"); 173 return false; 174 } 175 176 memset(event->vcpu + old_max_vcpu, 0, 177 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu)); 178 return true; 179} 180 181static struct kvm_event *kvm_alloc_init_event(struct event_key *key) 182{ 183 struct kvm_event *event; 184 185 event = zalloc(sizeof(*event)); 186 if (!event) { 187 pr_err("Not enough memory\n"); 188 return NULL; 189 } 190 191 event->key = *key; 192 init_stats(&event->total.stats); 193 return event; 194} 195 196static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm, 197 struct event_key *key) 198{ 199 struct kvm_event *event; 200 struct list_head *head; 201 202 BUG_ON(key->key == INVALID_KEY); 203 204 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)]; 205 list_for_each_entry(event, head, hash_entry) { 206 if (event->key.key == key->key && event->key.info == key->info) 207 return event; 208 } 209 210 event = kvm_alloc_init_event(key); 211 if (!event) 212 return NULL; 213 214 list_add(&event->hash_entry, head); 215 return event; 216} 217 218static bool handle_begin_event(struct perf_kvm_stat *kvm, 219 struct vcpu_event_record *vcpu_record, 220 struct event_key *key, u64 timestamp) 221{ 222 struct kvm_event *event = NULL; 223 224 if (key->key != INVALID_KEY) 225 event = find_create_kvm_event(kvm, key); 226 227 vcpu_record->last_event = event; 228 vcpu_record->start_time = timestamp; 229 return true; 230} 231 232static void 233kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff) 234{ 235 kvm_stats->time += time_diff; 236 update_stats(&kvm_stats->stats, time_diff); 237} 238 239static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event) 240{ 241 struct kvm_event_stats *kvm_stats = &event->total; 242 243 if (vcpu_id != -1) 244 kvm_stats = &event->vcpu[vcpu_id]; 245 246 return rel_stddev_stats(stddev_stats(&kvm_stats->stats), 247 avg_stats(&kvm_stats->stats)); 248} 249 250static bool update_kvm_event(struct kvm_event *event, int vcpu_id, 251 u64 time_diff) 252{ 253 if (vcpu_id == -1) { 254 kvm_update_event_stats(&event->total, time_diff); 255 return true; 256 } 257 258 if (!kvm_event_expand(event, vcpu_id)) 259 return false; 260 261 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff); 262 return true; 263} 264 265static bool is_child_event(struct perf_kvm_stat *kvm, 266 struct perf_evsel *evsel, 267 struct perf_sample *sample, 268 struct event_key *key) 269{ 270 struct child_event_ops *child_ops; 271 272 child_ops = kvm->events_ops->child_ops; 273 274 if (!child_ops) 275 return false; 276 277 for (; child_ops->name; child_ops++) { 278 if (!strcmp(evsel->name, child_ops->name)) { 279 child_ops->get_key(evsel, sample, key); 280 return true; 281 } 282 } 283 284 return false; 285} 286 287static bool handle_child_event(struct perf_kvm_stat *kvm, 288 struct vcpu_event_record *vcpu_record, 289 struct event_key *key, 290 struct perf_sample *sample __maybe_unused) 291{ 292 struct kvm_event *event = NULL; 293 294 if (key->key != INVALID_KEY) 295 event = find_create_kvm_event(kvm, key); 296 297 vcpu_record->last_event = event; 298 299 return true; 300} 301 302static bool skip_event(const char *event) 303{ 304 const char * const *skip_events; 305 306 for (skip_events = kvm_skip_events; *skip_events; skip_events++) 307 if (!strcmp(event, *skip_events)) 308 return true; 309 310 return false; 311} 312 313static bool handle_end_event(struct perf_kvm_stat *kvm, 314 struct vcpu_event_record *vcpu_record, 315 struct event_key *key, 316 struct perf_sample *sample) 317{ 318 struct kvm_event *event; 319 u64 time_begin, time_diff; 320 int vcpu; 321 322 if (kvm->trace_vcpu == -1) 323 vcpu = -1; 324 else 325 vcpu = vcpu_record->vcpu_id; 326 327 event = vcpu_record->last_event; 328 time_begin = vcpu_record->start_time; 329 330 /* The begin event is not caught. */ 331 if (!time_begin) 332 return true; 333 334 /* 335 * In some case, the 'begin event' only records the start timestamp, 336 * the actual event is recognized in the 'end event' (e.g. mmio-event). 337 */ 338 339 /* Both begin and end events did not get the key. */ 340 if (!event && key->key == INVALID_KEY) 341 return true; 342 343 if (!event) 344 event = find_create_kvm_event(kvm, key); 345 346 if (!event) 347 return false; 348 349 vcpu_record->last_event = NULL; 350 vcpu_record->start_time = 0; 351 352 /* seems to happen once in a while during live mode */ 353 if (sample->time < time_begin) { 354 pr_debug("End time before begin time; skipping event.\n"); 355 return true; 356 } 357 358 time_diff = sample->time - time_begin; 359 360 if (kvm->duration && time_diff > kvm->duration) { 361 char decode[DECODE_STR_LEN]; 362 363 kvm->events_ops->decode_key(kvm, &event->key, decode); 364 if (!skip_event(decode)) { 365 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n", 366 sample->time, sample->pid, vcpu_record->vcpu_id, 367 decode, time_diff/1000); 368 } 369 } 370 371 return update_kvm_event(event, vcpu, time_diff); 372} 373 374static 375struct vcpu_event_record *per_vcpu_record(struct thread *thread, 376 struct perf_evsel *evsel, 377 struct perf_sample *sample) 378{ 379 /* Only kvm_entry records vcpu id. */ 380 if (!thread__priv(thread) && kvm_entry_event(evsel)) { 381 struct vcpu_event_record *vcpu_record; 382 383 vcpu_record = zalloc(sizeof(*vcpu_record)); 384 if (!vcpu_record) { 385 pr_err("%s: Not enough memory\n", __func__); 386 return NULL; 387 } 388 389 vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample, VCPU_ID); 390 thread__set_priv(thread, vcpu_record); 391 } 392 393 return thread__priv(thread); 394} 395 396static bool handle_kvm_event(struct perf_kvm_stat *kvm, 397 struct thread *thread, 398 struct perf_evsel *evsel, 399 struct perf_sample *sample) 400{ 401 struct vcpu_event_record *vcpu_record; 402 struct event_key key = { .key = INVALID_KEY, 403 .exit_reasons = kvm->exit_reasons }; 404 405 vcpu_record = per_vcpu_record(thread, evsel, sample); 406 if (!vcpu_record) 407 return true; 408 409 /* only process events for vcpus user cares about */ 410 if ((kvm->trace_vcpu != -1) && 411 (kvm->trace_vcpu != vcpu_record->vcpu_id)) 412 return true; 413 414 if (kvm->events_ops->is_begin_event(evsel, sample, &key)) 415 return handle_begin_event(kvm, vcpu_record, &key, sample->time); 416 417 if (is_child_event(kvm, evsel, sample, &key)) 418 return handle_child_event(kvm, vcpu_record, &key, sample); 419 420 if (kvm->events_ops->is_end_event(evsel, sample, &key)) 421 return handle_end_event(kvm, vcpu_record, &key, sample); 422 423 return true; 424} 425 426#define GET_EVENT_KEY(func, field) \ 427static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \ 428{ \ 429 if (vcpu == -1) \ 430 return event->total.field; \ 431 \ 432 if (vcpu >= event->max_vcpu) \ 433 return 0; \ 434 \ 435 return event->vcpu[vcpu].field; \ 436} 437 438#define COMPARE_EVENT_KEY(func, field) \ 439GET_EVENT_KEY(func, field) \ 440static int compare_kvm_event_ ## func(struct kvm_event *one, \ 441 struct kvm_event *two, int vcpu)\ 442{ \ 443 return get_event_ ##func(one, vcpu) > \ 444 get_event_ ##func(two, vcpu); \ 445} 446 447GET_EVENT_KEY(time, time); 448COMPARE_EVENT_KEY(count, stats.n); 449COMPARE_EVENT_KEY(mean, stats.mean); 450GET_EVENT_KEY(max, stats.max); 451GET_EVENT_KEY(min, stats.min); 452 453#define DEF_SORT_NAME_KEY(name, compare_key) \ 454 { #name, compare_kvm_event_ ## compare_key } 455 456static struct kvm_event_key keys[] = { 457 DEF_SORT_NAME_KEY(sample, count), 458 DEF_SORT_NAME_KEY(time, mean), 459 { NULL, NULL } 460}; 461 462static bool select_key(struct perf_kvm_stat *kvm) 463{ 464 int i; 465 466 for (i = 0; keys[i].name; i++) { 467 if (!strcmp(keys[i].name, kvm->sort_key)) { 468 kvm->compare = keys[i].key; 469 return true; 470 } 471 } 472 473 pr_err("Unknown compare key:%s\n", kvm->sort_key); 474 return false; 475} 476 477static void insert_to_result(struct rb_root *result, struct kvm_event *event, 478 key_cmp_fun bigger, int vcpu) 479{ 480 struct rb_node **rb = &result->rb_node; 481 struct rb_node *parent = NULL; 482 struct kvm_event *p; 483 484 while (*rb) { 485 p = container_of(*rb, struct kvm_event, rb); 486 parent = *rb; 487 488 if (bigger(event, p, vcpu)) 489 rb = &(*rb)->rb_left; 490 else 491 rb = &(*rb)->rb_right; 492 } 493 494 rb_link_node(&event->rb, parent, rb); 495 rb_insert_color(&event->rb, result); 496} 497 498static void 499update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event) 500{ 501 int vcpu = kvm->trace_vcpu; 502 503 kvm->total_count += get_event_count(event, vcpu); 504 kvm->total_time += get_event_time(event, vcpu); 505} 506 507static bool event_is_valid(struct kvm_event *event, int vcpu) 508{ 509 return !!get_event_count(event, vcpu); 510} 511 512static void sort_result(struct perf_kvm_stat *kvm) 513{ 514 unsigned int i; 515 int vcpu = kvm->trace_vcpu; 516 struct kvm_event *event; 517 518 for (i = 0; i < EVENTS_CACHE_SIZE; i++) { 519 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) { 520 if (event_is_valid(event, vcpu)) { 521 update_total_count(kvm, event); 522 insert_to_result(&kvm->result, event, 523 kvm->compare, vcpu); 524 } 525 } 526 } 527} 528 529/* returns left most element of result, and erase it */ 530static struct kvm_event *pop_from_result(struct rb_root *result) 531{ 532 struct rb_node *node = rb_first(result); 533 534 if (!node) 535 return NULL; 536 537 rb_erase(node, result); 538 return container_of(node, struct kvm_event, rb); 539} 540 541static void print_vcpu_info(struct perf_kvm_stat *kvm) 542{ 543 int vcpu = kvm->trace_vcpu; 544 545 pr_info("Analyze events for "); 546 547 if (kvm->opts.target.system_wide) 548 pr_info("all VMs, "); 549 else if (kvm->opts.target.pid) 550 pr_info("pid(s) %s, ", kvm->opts.target.pid); 551 else 552 pr_info("dazed and confused on what is monitored, "); 553 554 if (vcpu == -1) 555 pr_info("all VCPUs:\n\n"); 556 else 557 pr_info("VCPU %d:\n\n", vcpu); 558} 559 560static void show_timeofday(void) 561{ 562 char date[64]; 563 struct timeval tv; 564 struct tm ltime; 565 566 gettimeofday(&tv, NULL); 567 if (localtime_r(&tv.tv_sec, <ime)) { 568 strftime(date, sizeof(date), "%H:%M:%S", <ime); 569 pr_info("%s.%06ld", date, tv.tv_usec); 570 } else 571 pr_info("00:00:00.000000"); 572 573 return; 574} 575 576static void print_result(struct perf_kvm_stat *kvm) 577{ 578 char decode[DECODE_STR_LEN]; 579 struct kvm_event *event; 580 int vcpu = kvm->trace_vcpu; 581 582 if (kvm->live) { 583 puts(CONSOLE_CLEAR); 584 show_timeofday(); 585 } 586 587 pr_info("\n\n"); 588 print_vcpu_info(kvm); 589 pr_info("%*s ", DECODE_STR_LEN, kvm->events_ops->name); 590 pr_info("%10s ", "Samples"); 591 pr_info("%9s ", "Samples%"); 592 593 pr_info("%9s ", "Time%"); 594 pr_info("%11s ", "Min Time"); 595 pr_info("%11s ", "Max Time"); 596 pr_info("%16s ", "Avg time"); 597 pr_info("\n\n"); 598 599 while ((event = pop_from_result(&kvm->result))) { 600 u64 ecount, etime, max, min; 601 602 ecount = get_event_count(event, vcpu); 603 etime = get_event_time(event, vcpu); 604 max = get_event_max(event, vcpu); 605 min = get_event_min(event, vcpu); 606 607 kvm->events_ops->decode_key(kvm, &event->key, decode); 608 pr_info("%*s ", DECODE_STR_LEN, decode); 609 pr_info("%10llu ", (unsigned long long)ecount); 610 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100); 611 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100); 612 pr_info("%9.2fus ", (double)min / 1e3); 613 pr_info("%9.2fus ", (double)max / 1e3); 614 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3, 615 kvm_event_rel_stddev(vcpu, event)); 616 pr_info("\n"); 617 } 618 619 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n", 620 kvm->total_count, kvm->total_time / 1e3); 621 622 if (kvm->lost_events) 623 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events); 624} 625 626#ifdef HAVE_TIMERFD_SUPPORT 627static int process_lost_event(struct perf_tool *tool, 628 union perf_event *event __maybe_unused, 629 struct perf_sample *sample __maybe_unused, 630 struct machine *machine __maybe_unused) 631{ 632 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool); 633 634 kvm->lost_events++; 635 return 0; 636} 637#endif 638 639static bool skip_sample(struct perf_kvm_stat *kvm, 640 struct perf_sample *sample) 641{ 642 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL) 643 return true; 644 645 return false; 646} 647 648static int process_sample_event(struct perf_tool *tool, 649 union perf_event *event, 650 struct perf_sample *sample, 651 struct perf_evsel *evsel, 652 struct machine *machine) 653{ 654 struct thread *thread; 655 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, 656 tool); 657 658 if (skip_sample(kvm, sample)) 659 return 0; 660 661 thread = machine__findnew_thread(machine, sample->pid, sample->tid); 662 if (thread == NULL) { 663 pr_debug("problem processing %d event, skipping it.\n", 664 event->header.type); 665 return -1; 666 } 667 668 if (!handle_kvm_event(kvm, thread, evsel, sample)) 669 return -1; 670 671 return 0; 672} 673 674static int cpu_isa_config(struct perf_kvm_stat *kvm) 675{ 676 char buf[64], *cpuid; 677 int err; 678 679 if (kvm->live) { 680 err = get_cpuid(buf, sizeof(buf)); 681 if (err != 0) { 682 pr_err("Failed to look up CPU type\n"); 683 return err; 684 } 685 cpuid = buf; 686 } else 687 cpuid = kvm->session->header.env.cpuid; 688 689 if (!cpuid) { 690 pr_err("Failed to look up CPU type\n"); 691 return -EINVAL; 692 } 693 694 err = cpu_isa_init(kvm, cpuid); 695 if (err == -ENOTSUP) 696 pr_err("CPU %s is not supported.\n", cpuid); 697 698 return err; 699} 700 701static bool verify_vcpu(int vcpu) 702{ 703 if (vcpu != -1 && vcpu < 0) { 704 pr_err("Invalid vcpu:%d.\n", vcpu); 705 return false; 706 } 707 708 return true; 709} 710 711#ifdef HAVE_TIMERFD_SUPPORT 712/* keeping the max events to a modest level to keep 713 * the processing of samples per mmap smooth. 714 */ 715#define PERF_KVM__MAX_EVENTS_PER_MMAP 25 716 717static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx, 718 u64 *mmap_time) 719{ 720 union perf_event *event; 721 struct perf_sample sample; 722 s64 n = 0; 723 int err; 724 725 *mmap_time = ULLONG_MAX; 726 while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) { 727 err = perf_evlist__parse_sample(kvm->evlist, event, &sample); 728 if (err) { 729 perf_evlist__mmap_consume(kvm->evlist, idx); 730 pr_err("Failed to parse sample\n"); 731 return -1; 732 } 733 734 err = perf_session__queue_event(kvm->session, event, &sample, 0); 735 /* 736 * FIXME: Here we can't consume the event, as perf_session__queue_event will 737 * point to it, and it'll get possibly overwritten by the kernel. 738 */ 739 perf_evlist__mmap_consume(kvm->evlist, idx); 740 741 if (err) { 742 pr_err("Failed to enqueue sample: %d\n", err); 743 return -1; 744 } 745 746 /* save time stamp of our first sample for this mmap */ 747 if (n == 0) 748 *mmap_time = sample.time; 749 750 /* limit events per mmap handled all at once */ 751 n++; 752 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP) 753 break; 754 } 755 756 return n; 757} 758 759static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm) 760{ 761 int i, err, throttled = 0; 762 s64 n, ntotal = 0; 763 u64 flush_time = ULLONG_MAX, mmap_time; 764 765 for (i = 0; i < kvm->evlist->nr_mmaps; i++) { 766 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time); 767 if (n < 0) 768 return -1; 769 770 /* flush time is going to be the minimum of all the individual 771 * mmap times. Essentially, we flush all the samples queued up 772 * from the last pass under our minimal start time -- that leaves 773 * a very small race for samples to come in with a lower timestamp. 774 * The ioctl to return the perf_clock timestamp should close the 775 * race entirely. 776 */ 777 if (mmap_time < flush_time) 778 flush_time = mmap_time; 779 780 ntotal += n; 781 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP) 782 throttled = 1; 783 } 784 785 /* flush queue after each round in which we processed events */ 786 if (ntotal) { 787 struct ordered_events *oe = &kvm->session->ordered_events; 788 789 oe->next_flush = flush_time; 790 err = ordered_events__flush(oe, OE_FLUSH__ROUND); 791 if (err) { 792 if (kvm->lost_events) 793 pr_info("\nLost events: %" PRIu64 "\n\n", 794 kvm->lost_events); 795 return err; 796 } 797 } 798 799 return throttled; 800} 801 802static volatile int done; 803 804static void sig_handler(int sig __maybe_unused) 805{ 806 done = 1; 807} 808 809static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm) 810{ 811 struct itimerspec new_value; 812 int rc = -1; 813 814 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK); 815 if (kvm->timerfd < 0) { 816 pr_err("timerfd_create failed\n"); 817 goto out; 818 } 819 820 new_value.it_value.tv_sec = kvm->display_time; 821 new_value.it_value.tv_nsec = 0; 822 new_value.it_interval.tv_sec = kvm->display_time; 823 new_value.it_interval.tv_nsec = 0; 824 825 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) { 826 pr_err("timerfd_settime failed: %d\n", errno); 827 close(kvm->timerfd); 828 goto out; 829 } 830 831 rc = 0; 832out: 833 return rc; 834} 835 836static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm) 837{ 838 uint64_t c; 839 int rc; 840 841 rc = read(kvm->timerfd, &c, sizeof(uint64_t)); 842 if (rc < 0) { 843 if (errno == EAGAIN) 844 return 0; 845 846 pr_err("Failed to read timer fd: %d\n", errno); 847 return -1; 848 } 849 850 if (rc != sizeof(uint64_t)) { 851 pr_err("Error reading timer fd - invalid size returned\n"); 852 return -1; 853 } 854 855 if (c != 1) 856 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1); 857 858 /* update display */ 859 sort_result(kvm); 860 print_result(kvm); 861 862 /* reset counts */ 863 clear_events_cache_stats(kvm->kvm_events_cache); 864 kvm->total_count = 0; 865 kvm->total_time = 0; 866 kvm->lost_events = 0; 867 868 return 0; 869} 870 871static int fd_set_nonblock(int fd) 872{ 873 long arg = 0; 874 875 arg = fcntl(fd, F_GETFL); 876 if (arg < 0) { 877 pr_err("Failed to get current flags for fd %d\n", fd); 878 return -1; 879 } 880 881 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) { 882 pr_err("Failed to set non-block option on fd %d\n", fd); 883 return -1; 884 } 885 886 return 0; 887} 888 889static int perf_kvm__handle_stdin(void) 890{ 891 int c; 892 893 c = getc(stdin); 894 if (c == 'q') 895 return 1; 896 897 return 0; 898} 899 900static int kvm_events_live_report(struct perf_kvm_stat *kvm) 901{ 902 int nr_stdin, ret, err = -EINVAL; 903 struct termios save; 904 905 /* live flag must be set first */ 906 kvm->live = true; 907 908 ret = cpu_isa_config(kvm); 909 if (ret < 0) 910 return ret; 911 912 if (!verify_vcpu(kvm->trace_vcpu) || 913 !select_key(kvm) || 914 !register_kvm_events_ops(kvm)) { 915 goto out; 916 } 917 918 set_term_quiet_input(&save); 919 init_kvm_event_record(kvm); 920 921 signal(SIGINT, sig_handler); 922 signal(SIGTERM, sig_handler); 923 924 /* add timer fd */ 925 if (perf_kvm__timerfd_create(kvm) < 0) { 926 err = -1; 927 goto out; 928 } 929 930 if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0) 931 goto out; 932 933 nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin)); 934 if (nr_stdin < 0) 935 goto out; 936 937 if (fd_set_nonblock(fileno(stdin)) != 0) 938 goto out; 939 940 /* everything is good - enable the events and process */ 941 perf_evlist__enable(kvm->evlist); 942 943 while (!done) { 944 struct fdarray *fda = &kvm->evlist->pollfd; 945 int rc; 946 947 rc = perf_kvm__mmap_read(kvm); 948 if (rc < 0) 949 break; 950 951 err = perf_kvm__handle_timerfd(kvm); 952 if (err) 953 goto out; 954 955 if (fda->entries[nr_stdin].revents & POLLIN) 956 done = perf_kvm__handle_stdin(); 957 958 if (!rc && !done) 959 err = fdarray__poll(fda, 100); 960 } 961 962 perf_evlist__disable(kvm->evlist); 963 964 if (err == 0) { 965 sort_result(kvm); 966 print_result(kvm); 967 } 968 969out: 970 if (kvm->timerfd >= 0) 971 close(kvm->timerfd); 972 973 tcsetattr(0, TCSAFLUSH, &save); 974 return err; 975} 976 977static int kvm_live_open_events(struct perf_kvm_stat *kvm) 978{ 979 int err, rc = -1; 980 struct perf_evsel *pos; 981 struct perf_evlist *evlist = kvm->evlist; 982 char sbuf[STRERR_BUFSIZE]; 983 984 perf_evlist__config(evlist, &kvm->opts); 985 986 /* 987 * Note: exclude_{guest,host} do not apply here. 988 * This command processes KVM tracepoints from host only 989 */ 990 evlist__for_each(evlist, pos) { 991 struct perf_event_attr *attr = &pos->attr; 992 993 /* make sure these *are* set */ 994 perf_evsel__set_sample_bit(pos, TID); 995 perf_evsel__set_sample_bit(pos, TIME); 996 perf_evsel__set_sample_bit(pos, CPU); 997 perf_evsel__set_sample_bit(pos, RAW); 998 /* make sure these are *not*; want as small a sample as possible */ 999 perf_evsel__reset_sample_bit(pos, PERIOD); 1000 perf_evsel__reset_sample_bit(pos, IP); 1001 perf_evsel__reset_sample_bit(pos, CALLCHAIN); 1002 perf_evsel__reset_sample_bit(pos, ADDR); 1003 perf_evsel__reset_sample_bit(pos, READ); 1004 attr->mmap = 0; 1005 attr->comm = 0; 1006 attr->task = 0; 1007 1008 attr->sample_period = 1; 1009 1010 attr->watermark = 0; 1011 attr->wakeup_events = 1000; 1012 1013 /* will enable all once we are ready */ 1014 attr->disabled = 1; 1015 } 1016 1017 err = perf_evlist__open(evlist); 1018 if (err < 0) { 1019 printf("Couldn't create the events: %s\n", 1020 strerror_r(errno, sbuf, sizeof(sbuf))); 1021 goto out; 1022 } 1023 1024 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) { 1025 ui__error("Failed to mmap the events: %s\n", 1026 strerror_r(errno, sbuf, sizeof(sbuf))); 1027 perf_evlist__close(evlist); 1028 goto out; 1029 } 1030 1031 rc = 0; 1032 1033out: 1034 return rc; 1035} 1036#endif 1037 1038static int read_events(struct perf_kvm_stat *kvm) 1039{ 1040 int ret; 1041 1042 struct perf_tool eops = { 1043 .sample = process_sample_event, 1044 .comm = perf_event__process_comm, 1045 .ordered_events = true, 1046 }; 1047 struct perf_data_file file = { 1048 .path = kvm->file_name, 1049 .mode = PERF_DATA_MODE_READ, 1050 .force = kvm->force, 1051 }; 1052 1053 kvm->tool = eops; 1054 kvm->session = perf_session__new(&file, false, &kvm->tool); 1055 if (!kvm->session) { 1056 pr_err("Initializing perf session failed\n"); 1057 return -1; 1058 } 1059 1060 symbol__init(&kvm->session->header.env); 1061 1062 if (!perf_session__has_traces(kvm->session, "kvm record")) 1063 return -EINVAL; 1064 1065 /* 1066 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not 1067 * traced in the old kernel. 1068 */ 1069 ret = cpu_isa_config(kvm); 1070 if (ret < 0) 1071 return ret; 1072 1073 return perf_session__process_events(kvm->session); 1074} 1075 1076static int parse_target_str(struct perf_kvm_stat *kvm) 1077{ 1078 if (kvm->opts.target.pid) { 1079 kvm->pid_list = intlist__new(kvm->opts.target.pid); 1080 if (kvm->pid_list == NULL) { 1081 pr_err("Error parsing process id string\n"); 1082 return -EINVAL; 1083 } 1084 } 1085 1086 return 0; 1087} 1088 1089static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm) 1090{ 1091 int ret = -EINVAL; 1092 int vcpu = kvm->trace_vcpu; 1093 1094 if (parse_target_str(kvm) != 0) 1095 goto exit; 1096 1097 if (!verify_vcpu(vcpu)) 1098 goto exit; 1099 1100 if (!select_key(kvm)) 1101 goto exit; 1102 1103 if (!register_kvm_events_ops(kvm)) 1104 goto exit; 1105 1106 init_kvm_event_record(kvm); 1107 setup_pager(); 1108 1109 ret = read_events(kvm); 1110 if (ret) 1111 goto exit; 1112 1113 sort_result(kvm); 1114 print_result(kvm); 1115 1116exit: 1117 return ret; 1118} 1119 1120#define STRDUP_FAIL_EXIT(s) \ 1121 ({ char *_p; \ 1122 _p = strdup(s); \ 1123 if (!_p) \ 1124 return -ENOMEM; \ 1125 _p; \ 1126 }) 1127 1128static int 1129kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv) 1130{ 1131 unsigned int rec_argc, i, j, events_tp_size; 1132 const char **rec_argv; 1133 const char * const record_args[] = { 1134 "record", 1135 "-R", 1136 "-m", "1024", 1137 "-c", "1", 1138 }; 1139 const char * const kvm_stat_record_usage[] = { 1140 "perf kvm stat record [<options>]", 1141 NULL 1142 }; 1143 const char * const *events_tp; 1144 events_tp_size = 0; 1145 1146 for (events_tp = kvm_events_tp; *events_tp; events_tp++) 1147 events_tp_size++; 1148 1149 rec_argc = ARRAY_SIZE(record_args) + argc + 2 + 1150 2 * events_tp_size; 1151 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1152 1153 if (rec_argv == NULL) 1154 return -ENOMEM; 1155 1156 for (i = 0; i < ARRAY_SIZE(record_args); i++) 1157 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]); 1158 1159 for (j = 0; j < events_tp_size; j++) { 1160 rec_argv[i++] = "-e"; 1161 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]); 1162 } 1163 1164 rec_argv[i++] = STRDUP_FAIL_EXIT("-o"); 1165 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name); 1166 1167 for (j = 1; j < (unsigned int)argc; j++, i++) 1168 rec_argv[i] = argv[j]; 1169 1170 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN); 1171 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN); 1172 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN); 1173 1174 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED); 1175 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED); 1176 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED); 1177 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED); 1178 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED); 1179 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED); 1180 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED); 1181 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED); 1182 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED); 1183 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED); 1184 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED); 1185 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED); 1186 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED); 1187 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED); 1188 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED); 1189 1190 record_usage = kvm_stat_record_usage; 1191 return cmd_record(i, rec_argv, NULL); 1192} 1193 1194static int 1195kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv) 1196{ 1197 const struct option kvm_events_report_options[] = { 1198 OPT_STRING(0, "event", &kvm->report_event, "report event", 1199 "event for reporting: vmexit, " 1200 "mmio (x86 only), ioport (x86 only)"), 1201 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu, 1202 "vcpu id to report"), 1203 OPT_STRING('k', "key", &kvm->sort_key, "sort-key", 1204 "key for sorting: sample(sort by samples number)" 1205 " time (sort by avg time)"), 1206 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid", 1207 "analyze events only for given process id(s)"), 1208 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"), 1209 OPT_END() 1210 }; 1211 1212 const char * const kvm_events_report_usage[] = { 1213 "perf kvm stat report [<options>]", 1214 NULL 1215 }; 1216 1217 if (argc) { 1218 argc = parse_options(argc, argv, 1219 kvm_events_report_options, 1220 kvm_events_report_usage, 0); 1221 if (argc) 1222 usage_with_options(kvm_events_report_usage, 1223 kvm_events_report_options); 1224 } 1225 1226 if (!kvm->opts.target.pid) 1227 kvm->opts.target.system_wide = true; 1228 1229 return kvm_events_report_vcpu(kvm); 1230} 1231 1232#ifdef HAVE_TIMERFD_SUPPORT 1233static struct perf_evlist *kvm_live_event_list(void) 1234{ 1235 struct perf_evlist *evlist; 1236 char *tp, *name, *sys; 1237 int err = -1; 1238 const char * const *events_tp; 1239 1240 evlist = perf_evlist__new(); 1241 if (evlist == NULL) 1242 return NULL; 1243 1244 for (events_tp = kvm_events_tp; *events_tp; events_tp++) { 1245 1246 tp = strdup(*events_tp); 1247 if (tp == NULL) 1248 goto out; 1249 1250 /* split tracepoint into subsystem and name */ 1251 sys = tp; 1252 name = strchr(tp, ':'); 1253 if (name == NULL) { 1254 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n", 1255 *events_tp); 1256 free(tp); 1257 goto out; 1258 } 1259 *name = '\0'; 1260 name++; 1261 1262 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) { 1263 pr_err("Failed to add %s tracepoint to the list\n", *events_tp); 1264 free(tp); 1265 goto out; 1266 } 1267 1268 free(tp); 1269 } 1270 1271 err = 0; 1272 1273out: 1274 if (err) { 1275 perf_evlist__delete(evlist); 1276 evlist = NULL; 1277 } 1278 1279 return evlist; 1280} 1281 1282static int kvm_events_live(struct perf_kvm_stat *kvm, 1283 int argc, const char **argv) 1284{ 1285 char errbuf[BUFSIZ]; 1286 int err; 1287 1288 const struct option live_options[] = { 1289 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid", 1290 "record events on existing process id"), 1291 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages", 1292 "number of mmap data pages", 1293 perf_evlist__parse_mmap_pages), 1294 OPT_INCR('v', "verbose", &verbose, 1295 "be more verbose (show counter open errors, etc)"), 1296 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide, 1297 "system-wide collection from all CPUs"), 1298 OPT_UINTEGER('d', "display", &kvm->display_time, 1299 "time in seconds between display updates"), 1300 OPT_STRING(0, "event", &kvm->report_event, "report event", 1301 "event for reporting: " 1302 "vmexit, mmio (x86 only), ioport (x86 only)"), 1303 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu, 1304 "vcpu id to report"), 1305 OPT_STRING('k', "key", &kvm->sort_key, "sort-key", 1306 "key for sorting: sample(sort by samples number)" 1307 " time (sort by avg time)"), 1308 OPT_U64(0, "duration", &kvm->duration, 1309 "show events other than" 1310 " HLT (x86 only) or Wait state (s390 only)" 1311 " that take longer than duration usecs"), 1312 OPT_END() 1313 }; 1314 const char * const live_usage[] = { 1315 "perf kvm stat live [<options>]", 1316 NULL 1317 }; 1318 struct perf_data_file file = { 1319 .mode = PERF_DATA_MODE_WRITE, 1320 }; 1321 1322 1323 /* event handling */ 1324 kvm->tool.sample = process_sample_event; 1325 kvm->tool.comm = perf_event__process_comm; 1326 kvm->tool.exit = perf_event__process_exit; 1327 kvm->tool.fork = perf_event__process_fork; 1328 kvm->tool.lost = process_lost_event; 1329 kvm->tool.ordered_events = true; 1330 perf_tool__fill_defaults(&kvm->tool); 1331 1332 /* set defaults */ 1333 kvm->display_time = 1; 1334 kvm->opts.user_interval = 1; 1335 kvm->opts.mmap_pages = 512; 1336 kvm->opts.target.uses_mmap = false; 1337 kvm->opts.target.uid_str = NULL; 1338 kvm->opts.target.uid = UINT_MAX; 1339 1340 symbol__init(NULL); 1341 disable_buildid_cache(); 1342 1343 use_browser = 0; 1344 setup_browser(false); 1345 1346 if (argc) { 1347 argc = parse_options(argc, argv, live_options, 1348 live_usage, 0); 1349 if (argc) 1350 usage_with_options(live_usage, live_options); 1351 } 1352 1353 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */ 1354 1355 /* 1356 * target related setups 1357 */ 1358 err = target__validate(&kvm->opts.target); 1359 if (err) { 1360 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ); 1361 ui__warning("%s", errbuf); 1362 } 1363 1364 if (target__none(&kvm->opts.target)) 1365 kvm->opts.target.system_wide = true; 1366 1367 1368 /* 1369 * generate the event list 1370 */ 1371 kvm->evlist = kvm_live_event_list(); 1372 if (kvm->evlist == NULL) { 1373 err = -1; 1374 goto out; 1375 } 1376 1377 symbol_conf.nr_events = kvm->evlist->nr_entries; 1378 1379 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0) 1380 usage_with_options(live_usage, live_options); 1381 1382 /* 1383 * perf session 1384 */ 1385 kvm->session = perf_session__new(&file, false, &kvm->tool); 1386 if (kvm->session == NULL) { 1387 err = -1; 1388 goto out; 1389 } 1390 kvm->session->evlist = kvm->evlist; 1391 perf_session__set_id_hdr_size(kvm->session); 1392 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true); 1393 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target, 1394 kvm->evlist->threads, false); 1395 err = kvm_live_open_events(kvm); 1396 if (err) 1397 goto out; 1398 1399 err = kvm_events_live_report(kvm); 1400 1401out: 1402 exit_browser(0); 1403 1404 if (kvm->session) 1405 perf_session__delete(kvm->session); 1406 kvm->session = NULL; 1407 if (kvm->evlist) 1408 perf_evlist__delete(kvm->evlist); 1409 1410 return err; 1411} 1412#endif 1413 1414static void print_kvm_stat_usage(void) 1415{ 1416 printf("Usage: perf kvm stat <command>\n\n"); 1417 1418 printf("# Available commands:\n"); 1419 printf("\trecord: record kvm events\n"); 1420 printf("\treport: report statistical data of kvm events\n"); 1421 printf("\tlive: live reporting of statistical data of kvm events\n"); 1422 1423 printf("\nOtherwise, it is the alias of 'perf stat':\n"); 1424} 1425 1426static int kvm_cmd_stat(const char *file_name, int argc, const char **argv) 1427{ 1428 struct perf_kvm_stat kvm = { 1429 .file_name = file_name, 1430 1431 .trace_vcpu = -1, 1432 .report_event = "vmexit", 1433 .sort_key = "sample", 1434 1435 }; 1436 1437 if (argc == 1) { 1438 print_kvm_stat_usage(); 1439 goto perf_stat; 1440 } 1441 1442 if (!strncmp(argv[1], "rec", 3)) 1443 return kvm_events_record(&kvm, argc - 1, argv + 1); 1444 1445 if (!strncmp(argv[1], "rep", 3)) 1446 return kvm_events_report(&kvm, argc - 1 , argv + 1); 1447 1448#ifdef HAVE_TIMERFD_SUPPORT 1449 if (!strncmp(argv[1], "live", 4)) 1450 return kvm_events_live(&kvm, argc - 1 , argv + 1); 1451#endif 1452 1453perf_stat: 1454 return cmd_stat(argc, argv, NULL); 1455} 1456#endif /* HAVE_KVM_STAT_SUPPORT */ 1457 1458static int __cmd_record(const char *file_name, int argc, const char **argv) 1459{ 1460 int rec_argc, i = 0, j; 1461 const char **rec_argv; 1462 1463 rec_argc = argc + 2; 1464 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1465 rec_argv[i++] = strdup("record"); 1466 rec_argv[i++] = strdup("-o"); 1467 rec_argv[i++] = strdup(file_name); 1468 for (j = 1; j < argc; j++, i++) 1469 rec_argv[i] = argv[j]; 1470 1471 BUG_ON(i != rec_argc); 1472 1473 return cmd_record(i, rec_argv, NULL); 1474} 1475 1476static int __cmd_report(const char *file_name, int argc, const char **argv) 1477{ 1478 int rec_argc, i = 0, j; 1479 const char **rec_argv; 1480 1481 rec_argc = argc + 2; 1482 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1483 rec_argv[i++] = strdup("report"); 1484 rec_argv[i++] = strdup("-i"); 1485 rec_argv[i++] = strdup(file_name); 1486 for (j = 1; j < argc; j++, i++) 1487 rec_argv[i] = argv[j]; 1488 1489 BUG_ON(i != rec_argc); 1490 1491 return cmd_report(i, rec_argv, NULL); 1492} 1493 1494static int 1495__cmd_buildid_list(const char *file_name, int argc, const char **argv) 1496{ 1497 int rec_argc, i = 0, j; 1498 const char **rec_argv; 1499 1500 rec_argc = argc + 2; 1501 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 1502 rec_argv[i++] = strdup("buildid-list"); 1503 rec_argv[i++] = strdup("-i"); 1504 rec_argv[i++] = strdup(file_name); 1505 for (j = 1; j < argc; j++, i++) 1506 rec_argv[i] = argv[j]; 1507 1508 BUG_ON(i != rec_argc); 1509 1510 return cmd_buildid_list(i, rec_argv, NULL); 1511} 1512 1513int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused) 1514{ 1515 const char *file_name = NULL; 1516 const struct option kvm_options[] = { 1517 OPT_STRING('i', "input", &file_name, "file", 1518 "Input file name"), 1519 OPT_STRING('o', "output", &file_name, "file", 1520 "Output file name"), 1521 OPT_BOOLEAN(0, "guest", &perf_guest, 1522 "Collect guest os data"), 1523 OPT_BOOLEAN(0, "host", &perf_host, 1524 "Collect host os data"), 1525 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory", 1526 "guest mount directory under which every guest os" 1527 " instance has a subdir"), 1528 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name, 1529 "file", "file saving guest os vmlinux"), 1530 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms, 1531 "file", "file saving guest os /proc/kallsyms"), 1532 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules, 1533 "file", "file saving guest os /proc/modules"), 1534 OPT_INCR('v', "verbose", &verbose, 1535 "be more verbose (show counter open errors, etc)"), 1536 OPT_END() 1537 }; 1538 1539 const char *const kvm_subcommands[] = { "top", "record", "report", "diff", 1540 "buildid-list", "stat", NULL }; 1541 const char *kvm_usage[] = { NULL, NULL }; 1542 1543 perf_host = 0; 1544 perf_guest = 1; 1545 1546 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage, 1547 PARSE_OPT_STOP_AT_NON_OPTION); 1548 if (!argc) 1549 usage_with_options(kvm_usage, kvm_options); 1550 1551 if (!perf_host) 1552 perf_guest = 1; 1553 1554 if (!file_name) { 1555 file_name = get_filename_for_perf_kvm(); 1556 1557 if (!file_name) { 1558 pr_err("Failed to allocate memory for filename\n"); 1559 return -ENOMEM; 1560 } 1561 } 1562 1563 if (!strncmp(argv[0], "rec", 3)) 1564 return __cmd_record(file_name, argc, argv); 1565 else if (!strncmp(argv[0], "rep", 3)) 1566 return __cmd_report(file_name, argc, argv); 1567 else if (!strncmp(argv[0], "diff", 4)) 1568 return cmd_diff(argc, argv, NULL); 1569 else if (!strncmp(argv[0], "top", 3)) 1570 return cmd_top(argc, argv, NULL); 1571 else if (!strncmp(argv[0], "buildid-list", 12)) 1572 return __cmd_buildid_list(file_name, argc, argv); 1573#ifdef HAVE_KVM_STAT_SUPPORT 1574 else if (!strncmp(argv[0], "stat", 4)) 1575 return kvm_cmd_stat(file_name, argc, argv); 1576#endif 1577 else 1578 usage_with_options(kvm_usage, kvm_options); 1579 1580 return 0; 1581} 1582