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