perf kvm stat report: Unify the title bar output
[deliverable/linux.git] / tools / perf / builtin-kvm.c
1 #include "builtin.h"
2 #include "perf.h"
3
4 #include "util/evsel.h"
5 #include "util/evlist.h"
6 #include "util/util.h"
7 #include "util/cache.h"
8 #include "util/symbol.h"
9 #include "util/thread.h"
10 #include "util/header.h"
11 #include "util/session.h"
12 #include "util/intlist.h"
13 #include "util/parse-options.h"
14 #include "util/trace-event.h"
15 #include "util/debug.h"
16 #include <api/fs/debugfs.h>
17 #include "util/tool.h"
18 #include "util/stat.h"
19 #include "util/top.h"
20 #include "util/data.h"
21
22 #include <sys/prctl.h>
23 #ifdef HAVE_TIMERFD_SUPPORT
24 #include <sys/timerfd.h>
25 #endif
26
27 #include <termios.h>
28 #include <semaphore.h>
29 #include <pthread.h>
30 #include <math.h>
31
32 #ifdef HAVE_KVM_STAT_SUPPORT
33 #include <asm/kvm_perf.h>
34 #include "util/kvm-stat.h"
35
36 void exit_event_get_key(struct perf_evsel *evsel,
37 struct perf_sample *sample,
38 struct event_key *key)
39 {
40 key->info = 0;
41 key->key = perf_evsel__intval(evsel, sample, KVM_EXIT_REASON);
42 }
43
44 bool kvm_exit_event(struct perf_evsel *evsel)
45 {
46 return !strcmp(evsel->name, KVM_EXIT_TRACE);
47 }
48
49 bool exit_event_begin(struct perf_evsel *evsel,
50 struct perf_sample *sample, struct event_key *key)
51 {
52 if (kvm_exit_event(evsel)) {
53 exit_event_get_key(evsel, sample, key);
54 return true;
55 }
56
57 return false;
58 }
59
60 bool kvm_entry_event(struct perf_evsel *evsel)
61 {
62 return !strcmp(evsel->name, KVM_ENTRY_TRACE);
63 }
64
65 bool exit_event_end(struct perf_evsel *evsel,
66 struct perf_sample *sample __maybe_unused,
67 struct event_key *key __maybe_unused)
68 {
69 return kvm_entry_event(evsel);
70 }
71
72 static const char *get_exit_reason(struct perf_kvm_stat *kvm,
73 struct exit_reasons_table *tbl,
74 u64 exit_code)
75 {
76 while (tbl->reason != NULL) {
77 if (tbl->exit_code == exit_code)
78 return tbl->reason;
79 tbl++;
80 }
81
82 pr_err("unknown kvm exit code:%lld on %s\n",
83 (unsigned long long)exit_code, kvm->exit_reasons_isa);
84 return "UNKNOWN";
85 }
86
87 void exit_event_decode_key(struct perf_kvm_stat *kvm,
88 struct event_key *key,
89 char *decode)
90 {
91 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
92 key->key);
93
94 scnprintf(decode, DECODE_STR_LEN, "%s", exit_reason);
95 }
96
97 static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
98 {
99 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
100
101 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) {
102 if (!strcmp(events_ops->name, kvm->report_event)) {
103 kvm->events_ops = events_ops->ops;
104 return true;
105 }
106 }
107
108 return false;
109 }
110
111 struct vcpu_event_record {
112 int vcpu_id;
113 u64 start_time;
114 struct kvm_event *last_event;
115 };
116
117
118 static void init_kvm_event_record(struct perf_kvm_stat *kvm)
119 {
120 unsigned int i;
121
122 for (i = 0; i < EVENTS_CACHE_SIZE; i++)
123 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
124 }
125
126 #ifdef HAVE_TIMERFD_SUPPORT
127 static void clear_events_cache_stats(struct list_head *kvm_events_cache)
128 {
129 struct list_head *head;
130 struct kvm_event *event;
131 unsigned int i;
132 int j;
133
134 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
135 head = &kvm_events_cache[i];
136 list_for_each_entry(event, head, hash_entry) {
137 /* reset stats for event */
138 event->total.time = 0;
139 init_stats(&event->total.stats);
140
141 for (j = 0; j < event->max_vcpu; ++j) {
142 event->vcpu[j].time = 0;
143 init_stats(&event->vcpu[j].stats);
144 }
145 }
146 }
147 }
148 #endif
149
150 static int kvm_events_hash_fn(u64 key)
151 {
152 return key & (EVENTS_CACHE_SIZE - 1);
153 }
154
155 static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
156 {
157 int old_max_vcpu = event->max_vcpu;
158 void *prev;
159
160 if (vcpu_id < event->max_vcpu)
161 return true;
162
163 while (event->max_vcpu <= vcpu_id)
164 event->max_vcpu += DEFAULT_VCPU_NUM;
165
166 prev = event->vcpu;
167 event->vcpu = realloc(event->vcpu,
168 event->max_vcpu * sizeof(*event->vcpu));
169 if (!event->vcpu) {
170 free(prev);
171 pr_err("Not enough memory\n");
172 return false;
173 }
174
175 memset(event->vcpu + old_max_vcpu, 0,
176 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
177 return true;
178 }
179
180 static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
181 {
182 struct kvm_event *event;
183
184 event = zalloc(sizeof(*event));
185 if (!event) {
186 pr_err("Not enough memory\n");
187 return NULL;
188 }
189
190 event->key = *key;
191 init_stats(&event->total.stats);
192 return event;
193 }
194
195 static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
196 struct event_key *key)
197 {
198 struct kvm_event *event;
199 struct list_head *head;
200
201 BUG_ON(key->key == INVALID_KEY);
202
203 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
204 list_for_each_entry(event, head, hash_entry) {
205 if (event->key.key == key->key && event->key.info == key->info)
206 return event;
207 }
208
209 event = kvm_alloc_init_event(key);
210 if (!event)
211 return NULL;
212
213 list_add(&event->hash_entry, head);
214 return event;
215 }
216
217 static bool handle_begin_event(struct perf_kvm_stat *kvm,
218 struct vcpu_event_record *vcpu_record,
219 struct event_key *key, u64 timestamp)
220 {
221 struct kvm_event *event = NULL;
222
223 if (key->key != INVALID_KEY)
224 event = find_create_kvm_event(kvm, key);
225
226 vcpu_record->last_event = event;
227 vcpu_record->start_time = timestamp;
228 return true;
229 }
230
231 static void
232 kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
233 {
234 kvm_stats->time += time_diff;
235 update_stats(&kvm_stats->stats, time_diff);
236 }
237
238 static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
239 {
240 struct kvm_event_stats *kvm_stats = &event->total;
241
242 if (vcpu_id != -1)
243 kvm_stats = &event->vcpu[vcpu_id];
244
245 return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
246 avg_stats(&kvm_stats->stats));
247 }
248
249 static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
250 u64 time_diff)
251 {
252 if (vcpu_id == -1) {
253 kvm_update_event_stats(&event->total, time_diff);
254 return true;
255 }
256
257 if (!kvm_event_expand(event, vcpu_id))
258 return false;
259
260 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
261 return true;
262 }
263
264 static bool is_child_event(struct perf_kvm_stat *kvm,
265 struct perf_evsel *evsel,
266 struct perf_sample *sample,
267 struct event_key *key)
268 {
269 struct child_event_ops *child_ops;
270
271 child_ops = kvm->events_ops->child_ops;
272
273 if (!child_ops)
274 return false;
275
276 for (; child_ops->name; child_ops++) {
277 if (!strcmp(evsel->name, child_ops->name)) {
278 child_ops->get_key(evsel, sample, key);
279 return true;
280 }
281 }
282
283 return false;
284 }
285
286 static bool handle_child_event(struct perf_kvm_stat *kvm,
287 struct vcpu_event_record *vcpu_record,
288 struct event_key *key,
289 struct perf_sample *sample __maybe_unused)
290 {
291 struct kvm_event *event = NULL;
292
293 if (key->key != INVALID_KEY)
294 event = find_create_kvm_event(kvm, key);
295
296 vcpu_record->last_event = event;
297
298 return true;
299 }
300
301 static bool skip_event(const char *event)
302 {
303 const char * const *skip_events;
304
305 for (skip_events = kvm_skip_events; *skip_events; skip_events++)
306 if (!strcmp(event, *skip_events))
307 return true;
308
309 return false;
310 }
311
312 static bool handle_end_event(struct perf_kvm_stat *kvm,
313 struct vcpu_event_record *vcpu_record,
314 struct event_key *key,
315 struct perf_sample *sample)
316 {
317 struct kvm_event *event;
318 u64 time_begin, time_diff;
319 int vcpu;
320
321 if (kvm->trace_vcpu == -1)
322 vcpu = -1;
323 else
324 vcpu = vcpu_record->vcpu_id;
325
326 event = vcpu_record->last_event;
327 time_begin = vcpu_record->start_time;
328
329 /* The begin event is not caught. */
330 if (!time_begin)
331 return true;
332
333 /*
334 * In some case, the 'begin event' only records the start timestamp,
335 * the actual event is recognized in the 'end event' (e.g. mmio-event).
336 */
337
338 /* Both begin and end events did not get the key. */
339 if (!event && key->key == INVALID_KEY)
340 return true;
341
342 if (!event)
343 event = find_create_kvm_event(kvm, key);
344
345 if (!event)
346 return false;
347
348 vcpu_record->last_event = NULL;
349 vcpu_record->start_time = 0;
350
351 /* seems to happen once in a while during live mode */
352 if (sample->time < time_begin) {
353 pr_debug("End time before begin time; skipping event.\n");
354 return true;
355 }
356
357 time_diff = sample->time - time_begin;
358
359 if (kvm->duration && time_diff > kvm->duration) {
360 char decode[DECODE_STR_LEN];
361
362 kvm->events_ops->decode_key(kvm, &event->key, decode);
363 if (!skip_event(decode)) {
364 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
365 sample->time, sample->pid, vcpu_record->vcpu_id,
366 decode, time_diff/1000);
367 }
368 }
369
370 return update_kvm_event(event, vcpu, time_diff);
371 }
372
373 static
374 struct vcpu_event_record *per_vcpu_record(struct thread *thread,
375 struct perf_evsel *evsel,
376 struct perf_sample *sample)
377 {
378 /* Only kvm_entry records vcpu id. */
379 if (!thread->priv && kvm_entry_event(evsel)) {
380 struct vcpu_event_record *vcpu_record;
381
382 vcpu_record = zalloc(sizeof(*vcpu_record));
383 if (!vcpu_record) {
384 pr_err("%s: Not enough memory\n", __func__);
385 return NULL;
386 }
387
388 vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample, VCPU_ID);
389 thread->priv = vcpu_record;
390 }
391
392 return thread->priv;
393 }
394
395 static bool handle_kvm_event(struct perf_kvm_stat *kvm,
396 struct thread *thread,
397 struct perf_evsel *evsel,
398 struct perf_sample *sample)
399 {
400 struct vcpu_event_record *vcpu_record;
401 struct event_key key = { .key = INVALID_KEY,
402 .exit_reasons = kvm->exit_reasons };
403
404 vcpu_record = per_vcpu_record(thread, evsel, sample);
405 if (!vcpu_record)
406 return true;
407
408 /* only process events for vcpus user cares about */
409 if ((kvm->trace_vcpu != -1) &&
410 (kvm->trace_vcpu != vcpu_record->vcpu_id))
411 return true;
412
413 if (kvm->events_ops->is_begin_event(evsel, sample, &key))
414 return handle_begin_event(kvm, vcpu_record, &key, sample->time);
415
416 if (is_child_event(kvm, evsel, sample, &key))
417 return handle_child_event(kvm, vcpu_record, &key, sample);
418
419 if (kvm->events_ops->is_end_event(evsel, sample, &key))
420 return handle_end_event(kvm, vcpu_record, &key, sample);
421
422 return true;
423 }
424
425 #define GET_EVENT_KEY(func, field) \
426 static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
427 { \
428 if (vcpu == -1) \
429 return event->total.field; \
430 \
431 if (vcpu >= event->max_vcpu) \
432 return 0; \
433 \
434 return event->vcpu[vcpu].field; \
435 }
436
437 #define COMPARE_EVENT_KEY(func, field) \
438 GET_EVENT_KEY(func, field) \
439 static int compare_kvm_event_ ## func(struct kvm_event *one, \
440 struct kvm_event *two, int vcpu)\
441 { \
442 return get_event_ ##func(one, vcpu) > \
443 get_event_ ##func(two, vcpu); \
444 }
445
446 GET_EVENT_KEY(time, time);
447 COMPARE_EVENT_KEY(count, stats.n);
448 COMPARE_EVENT_KEY(mean, stats.mean);
449 GET_EVENT_KEY(max, stats.max);
450 GET_EVENT_KEY(min, stats.min);
451
452 #define DEF_SORT_NAME_KEY(name, compare_key) \
453 { #name, compare_kvm_event_ ## compare_key }
454
455 static struct kvm_event_key keys[] = {
456 DEF_SORT_NAME_KEY(sample, count),
457 DEF_SORT_NAME_KEY(time, mean),
458 { NULL, NULL }
459 };
460
461 static bool select_key(struct perf_kvm_stat *kvm)
462 {
463 int i;
464
465 for (i = 0; keys[i].name; i++) {
466 if (!strcmp(keys[i].name, kvm->sort_key)) {
467 kvm->compare = keys[i].key;
468 return true;
469 }
470 }
471
472 pr_err("Unknown compare key:%s\n", kvm->sort_key);
473 return false;
474 }
475
476 static void insert_to_result(struct rb_root *result, struct kvm_event *event,
477 key_cmp_fun bigger, int vcpu)
478 {
479 struct rb_node **rb = &result->rb_node;
480 struct rb_node *parent = NULL;
481 struct kvm_event *p;
482
483 while (*rb) {
484 p = container_of(*rb, struct kvm_event, rb);
485 parent = *rb;
486
487 if (bigger(event, p, vcpu))
488 rb = &(*rb)->rb_left;
489 else
490 rb = &(*rb)->rb_right;
491 }
492
493 rb_link_node(&event->rb, parent, rb);
494 rb_insert_color(&event->rb, result);
495 }
496
497 static void
498 update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
499 {
500 int vcpu = kvm->trace_vcpu;
501
502 kvm->total_count += get_event_count(event, vcpu);
503 kvm->total_time += get_event_time(event, vcpu);
504 }
505
506 static bool event_is_valid(struct kvm_event *event, int vcpu)
507 {
508 return !!get_event_count(event, vcpu);
509 }
510
511 static void sort_result(struct perf_kvm_stat *kvm)
512 {
513 unsigned int i;
514 int vcpu = kvm->trace_vcpu;
515 struct kvm_event *event;
516
517 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
518 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
519 if (event_is_valid(event, vcpu)) {
520 update_total_count(kvm, event);
521 insert_to_result(&kvm->result, event,
522 kvm->compare, vcpu);
523 }
524 }
525 }
526 }
527
528 /* returns left most element of result, and erase it */
529 static struct kvm_event *pop_from_result(struct rb_root *result)
530 {
531 struct rb_node *node = rb_first(result);
532
533 if (!node)
534 return NULL;
535
536 rb_erase(node, result);
537 return container_of(node, struct kvm_event, rb);
538 }
539
540 static void print_vcpu_info(struct perf_kvm_stat *kvm)
541 {
542 int vcpu = kvm->trace_vcpu;
543
544 pr_info("Analyze events for ");
545
546 if (kvm->opts.target.system_wide)
547 pr_info("all VMs, ");
548 else if (kvm->opts.target.pid)
549 pr_info("pid(s) %s, ", kvm->opts.target.pid);
550 else
551 pr_info("dazed and confused on what is monitored, ");
552
553 if (vcpu == -1)
554 pr_info("all VCPUs:\n\n");
555 else
556 pr_info("VCPU %d:\n\n", vcpu);
557 }
558
559 static void show_timeofday(void)
560 {
561 char date[64];
562 struct timeval tv;
563 struct tm ltime;
564
565 gettimeofday(&tv, NULL);
566 if (localtime_r(&tv.tv_sec, &ltime)) {
567 strftime(date, sizeof(date), "%H:%M:%S", &ltime);
568 pr_info("%s.%06ld", date, tv.tv_usec);
569 } else
570 pr_info("00:00:00.000000");
571
572 return;
573 }
574
575 static void print_result(struct perf_kvm_stat *kvm)
576 {
577 char decode[DECODE_STR_LEN];
578 struct kvm_event *event;
579 int vcpu = kvm->trace_vcpu;
580
581 if (kvm->live) {
582 puts(CONSOLE_CLEAR);
583 show_timeofday();
584 }
585
586 pr_info("\n\n");
587 print_vcpu_info(kvm);
588 pr_info("%*s ", DECODE_STR_LEN, kvm->events_ops->name);
589 pr_info("%10s ", "Samples");
590 pr_info("%9s ", "Samples%");
591
592 pr_info("%9s ", "Time%");
593 pr_info("%11s ", "Min Time");
594 pr_info("%11s ", "Max Time");
595 pr_info("%16s ", "Avg time");
596 pr_info("\n\n");
597
598 while ((event = pop_from_result(&kvm->result))) {
599 u64 ecount, etime, max, min;
600
601 ecount = get_event_count(event, vcpu);
602 etime = get_event_time(event, vcpu);
603 max = get_event_max(event, vcpu);
604 min = get_event_min(event, vcpu);
605
606 kvm->events_ops->decode_key(kvm, &event->key, decode);
607 pr_info("%*s ", DECODE_STR_LEN, decode);
608 pr_info("%10llu ", (unsigned long long)ecount);
609 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
610 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
611 pr_info("%9.2fus ", (double)min / 1e3);
612 pr_info("%9.2fus ", (double)max / 1e3);
613 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3,
614 kvm_event_rel_stddev(vcpu, event));
615 pr_info("\n");
616 }
617
618 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
619 kvm->total_count, kvm->total_time / 1e3);
620
621 if (kvm->lost_events)
622 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
623 }
624
625 #ifdef HAVE_TIMERFD_SUPPORT
626 static int process_lost_event(struct perf_tool *tool,
627 union perf_event *event __maybe_unused,
628 struct perf_sample *sample __maybe_unused,
629 struct machine *machine __maybe_unused)
630 {
631 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
632
633 kvm->lost_events++;
634 return 0;
635 }
636 #endif
637
638 static bool skip_sample(struct perf_kvm_stat *kvm,
639 struct perf_sample *sample)
640 {
641 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
642 return true;
643
644 return false;
645 }
646
647 static int process_sample_event(struct perf_tool *tool,
648 union perf_event *event,
649 struct perf_sample *sample,
650 struct perf_evsel *evsel,
651 struct machine *machine)
652 {
653 struct thread *thread;
654 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
655 tool);
656
657 if (skip_sample(kvm, sample))
658 return 0;
659
660 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
661 if (thread == NULL) {
662 pr_debug("problem processing %d event, skipping it.\n",
663 event->header.type);
664 return -1;
665 }
666
667 if (!handle_kvm_event(kvm, thread, evsel, sample))
668 return -1;
669
670 return 0;
671 }
672
673 static int cpu_isa_config(struct perf_kvm_stat *kvm)
674 {
675 char buf[64], *cpuid;
676 int err;
677
678 if (kvm->live) {
679 err = get_cpuid(buf, sizeof(buf));
680 if (err != 0) {
681 pr_err("Failed to look up CPU type\n");
682 return err;
683 }
684 cpuid = buf;
685 } else
686 cpuid = kvm->session->header.env.cpuid;
687
688 if (!cpuid) {
689 pr_err("Failed to look up CPU type\n");
690 return -EINVAL;
691 }
692
693 err = cpu_isa_init(kvm, cpuid);
694 if (err == -ENOTSUP)
695 pr_err("CPU %s is not supported.\n", cpuid);
696
697 return err;
698 }
699
700 static bool verify_vcpu(int vcpu)
701 {
702 if (vcpu != -1 && vcpu < 0) {
703 pr_err("Invalid vcpu:%d.\n", vcpu);
704 return false;
705 }
706
707 return true;
708 }
709
710 #ifdef HAVE_TIMERFD_SUPPORT
711 /* keeping the max events to a modest level to keep
712 * the processing of samples per mmap smooth.
713 */
714 #define PERF_KVM__MAX_EVENTS_PER_MMAP 25
715
716 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
717 u64 *mmap_time)
718 {
719 union perf_event *event;
720 struct perf_sample sample;
721 s64 n = 0;
722 int err;
723
724 *mmap_time = ULLONG_MAX;
725 while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) {
726 err = perf_evlist__parse_sample(kvm->evlist, event, &sample);
727 if (err) {
728 perf_evlist__mmap_consume(kvm->evlist, idx);
729 pr_err("Failed to parse sample\n");
730 return -1;
731 }
732
733 err = perf_session_queue_event(kvm->session, event, &kvm->tool, &sample, 0);
734 /*
735 * FIXME: Here we can't consume the event, as perf_session_queue_event will
736 * point to it, and it'll get possibly overwritten by the kernel.
737 */
738 perf_evlist__mmap_consume(kvm->evlist, idx);
739
740 if (err) {
741 pr_err("Failed to enqueue sample: %d\n", err);
742 return -1;
743 }
744
745 /* save time stamp of our first sample for this mmap */
746 if (n == 0)
747 *mmap_time = sample.time;
748
749 /* limit events per mmap handled all at once */
750 n++;
751 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
752 break;
753 }
754
755 return n;
756 }
757
758 static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
759 {
760 int i, err, throttled = 0;
761 s64 n, ntotal = 0;
762 u64 flush_time = ULLONG_MAX, mmap_time;
763
764 for (i = 0; i < kvm->evlist->nr_mmaps; i++) {
765 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
766 if (n < 0)
767 return -1;
768
769 /* flush time is going to be the minimum of all the individual
770 * mmap times. Essentially, we flush all the samples queued up
771 * from the last pass under our minimal start time -- that leaves
772 * a very small race for samples to come in with a lower timestamp.
773 * The ioctl to return the perf_clock timestamp should close the
774 * race entirely.
775 */
776 if (mmap_time < flush_time)
777 flush_time = mmap_time;
778
779 ntotal += n;
780 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
781 throttled = 1;
782 }
783
784 /* flush queue after each round in which we processed events */
785 if (ntotal) {
786 kvm->session->ordered_events.next_flush = flush_time;
787 err = kvm->tool.finished_round(&kvm->tool, NULL, kvm->session);
788 if (err) {
789 if (kvm->lost_events)
790 pr_info("\nLost events: %" PRIu64 "\n\n",
791 kvm->lost_events);
792 return err;
793 }
794 }
795
796 return throttled;
797 }
798
799 static volatile int done;
800
801 static void sig_handler(int sig __maybe_unused)
802 {
803 done = 1;
804 }
805
806 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
807 {
808 struct itimerspec new_value;
809 int rc = -1;
810
811 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
812 if (kvm->timerfd < 0) {
813 pr_err("timerfd_create failed\n");
814 goto out;
815 }
816
817 new_value.it_value.tv_sec = kvm->display_time;
818 new_value.it_value.tv_nsec = 0;
819 new_value.it_interval.tv_sec = kvm->display_time;
820 new_value.it_interval.tv_nsec = 0;
821
822 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
823 pr_err("timerfd_settime failed: %d\n", errno);
824 close(kvm->timerfd);
825 goto out;
826 }
827
828 rc = 0;
829 out:
830 return rc;
831 }
832
833 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
834 {
835 uint64_t c;
836 int rc;
837
838 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
839 if (rc < 0) {
840 if (errno == EAGAIN)
841 return 0;
842
843 pr_err("Failed to read timer fd: %d\n", errno);
844 return -1;
845 }
846
847 if (rc != sizeof(uint64_t)) {
848 pr_err("Error reading timer fd - invalid size returned\n");
849 return -1;
850 }
851
852 if (c != 1)
853 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
854
855 /* update display */
856 sort_result(kvm);
857 print_result(kvm);
858
859 /* reset counts */
860 clear_events_cache_stats(kvm->kvm_events_cache);
861 kvm->total_count = 0;
862 kvm->total_time = 0;
863 kvm->lost_events = 0;
864
865 return 0;
866 }
867
868 static int fd_set_nonblock(int fd)
869 {
870 long arg = 0;
871
872 arg = fcntl(fd, F_GETFL);
873 if (arg < 0) {
874 pr_err("Failed to get current flags for fd %d\n", fd);
875 return -1;
876 }
877
878 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
879 pr_err("Failed to set non-block option on fd %d\n", fd);
880 return -1;
881 }
882
883 return 0;
884 }
885
886 static int perf_kvm__handle_stdin(void)
887 {
888 int c;
889
890 c = getc(stdin);
891 if (c == 'q')
892 return 1;
893
894 return 0;
895 }
896
897 static int kvm_events_live_report(struct perf_kvm_stat *kvm)
898 {
899 struct pollfd *pollfds = NULL;
900 int nr_fds, nr_stdin, ret, err = -EINVAL;
901 struct termios save;
902
903 /* live flag must be set first */
904 kvm->live = true;
905
906 ret = cpu_isa_config(kvm);
907 if (ret < 0)
908 return ret;
909
910 if (!verify_vcpu(kvm->trace_vcpu) ||
911 !select_key(kvm) ||
912 !register_kvm_events_ops(kvm)) {
913 goto out;
914 }
915
916 set_term_quiet_input(&save);
917 init_kvm_event_record(kvm);
918
919 signal(SIGINT, sig_handler);
920 signal(SIGTERM, sig_handler);
921
922 /* copy pollfds -- need to add timerfd and stdin */
923 nr_fds = kvm->evlist->nr_fds;
924 pollfds = zalloc(sizeof(struct pollfd) * (nr_fds + 2));
925 if (!pollfds) {
926 err = -ENOMEM;
927 goto out;
928 }
929 memcpy(pollfds, kvm->evlist->pollfd,
930 sizeof(struct pollfd) * kvm->evlist->nr_fds);
931
932 /* add timer fd */
933 if (perf_kvm__timerfd_create(kvm) < 0) {
934 err = -1;
935 goto out;
936 }
937
938 pollfds[nr_fds].fd = kvm->timerfd;
939 pollfds[nr_fds].events = POLLIN;
940 nr_fds++;
941
942 pollfds[nr_fds].fd = fileno(stdin);
943 pollfds[nr_fds].events = POLLIN;
944 nr_stdin = nr_fds;
945 nr_fds++;
946 if (fd_set_nonblock(fileno(stdin)) != 0)
947 goto out;
948
949 /* everything is good - enable the events and process */
950 perf_evlist__enable(kvm->evlist);
951
952 while (!done) {
953 int rc;
954
955 rc = perf_kvm__mmap_read(kvm);
956 if (rc < 0)
957 break;
958
959 err = perf_kvm__handle_timerfd(kvm);
960 if (err)
961 goto out;
962
963 if (pollfds[nr_stdin].revents & POLLIN)
964 done = perf_kvm__handle_stdin();
965
966 if (!rc && !done)
967 err = poll(pollfds, nr_fds, 100);
968 }
969
970 perf_evlist__disable(kvm->evlist);
971
972 if (err == 0) {
973 sort_result(kvm);
974 print_result(kvm);
975 }
976
977 out:
978 if (kvm->timerfd >= 0)
979 close(kvm->timerfd);
980
981 tcsetattr(0, TCSAFLUSH, &save);
982 free(pollfds);
983 return err;
984 }
985
986 static int kvm_live_open_events(struct perf_kvm_stat *kvm)
987 {
988 int err, rc = -1;
989 struct perf_evsel *pos;
990 struct perf_evlist *evlist = kvm->evlist;
991 char sbuf[STRERR_BUFSIZE];
992
993 perf_evlist__config(evlist, &kvm->opts);
994
995 /*
996 * Note: exclude_{guest,host} do not apply here.
997 * This command processes KVM tracepoints from host only
998 */
999 evlist__for_each(evlist, pos) {
1000 struct perf_event_attr *attr = &pos->attr;
1001
1002 /* make sure these *are* set */
1003 perf_evsel__set_sample_bit(pos, TID);
1004 perf_evsel__set_sample_bit(pos, TIME);
1005 perf_evsel__set_sample_bit(pos, CPU);
1006 perf_evsel__set_sample_bit(pos, RAW);
1007 /* make sure these are *not*; want as small a sample as possible */
1008 perf_evsel__reset_sample_bit(pos, PERIOD);
1009 perf_evsel__reset_sample_bit(pos, IP);
1010 perf_evsel__reset_sample_bit(pos, CALLCHAIN);
1011 perf_evsel__reset_sample_bit(pos, ADDR);
1012 perf_evsel__reset_sample_bit(pos, READ);
1013 attr->mmap = 0;
1014 attr->comm = 0;
1015 attr->task = 0;
1016
1017 attr->sample_period = 1;
1018
1019 attr->watermark = 0;
1020 attr->wakeup_events = 1000;
1021
1022 /* will enable all once we are ready */
1023 attr->disabled = 1;
1024 }
1025
1026 err = perf_evlist__open(evlist);
1027 if (err < 0) {
1028 printf("Couldn't create the events: %s\n",
1029 strerror_r(errno, sbuf, sizeof(sbuf)));
1030 goto out;
1031 }
1032
1033 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) {
1034 ui__error("Failed to mmap the events: %s\n",
1035 strerror_r(errno, sbuf, sizeof(sbuf)));
1036 perf_evlist__close(evlist);
1037 goto out;
1038 }
1039
1040 rc = 0;
1041
1042 out:
1043 return rc;
1044 }
1045 #endif
1046
1047 static int read_events(struct perf_kvm_stat *kvm)
1048 {
1049 int ret;
1050
1051 struct perf_tool eops = {
1052 .sample = process_sample_event,
1053 .comm = perf_event__process_comm,
1054 .ordered_events = true,
1055 };
1056 struct perf_data_file file = {
1057 .path = kvm->file_name,
1058 .mode = PERF_DATA_MODE_READ,
1059 };
1060
1061 kvm->tool = eops;
1062 kvm->session = perf_session__new(&file, false, &kvm->tool);
1063 if (!kvm->session) {
1064 pr_err("Initializing perf session failed\n");
1065 return -EINVAL;
1066 }
1067
1068 symbol__init(&kvm->session->header.env);
1069
1070 if (!perf_session__has_traces(kvm->session, "kvm record"))
1071 return -EINVAL;
1072
1073 /*
1074 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1075 * traced in the old kernel.
1076 */
1077 ret = cpu_isa_config(kvm);
1078 if (ret < 0)
1079 return ret;
1080
1081 return perf_session__process_events(kvm->session, &kvm->tool);
1082 }
1083
1084 static int parse_target_str(struct perf_kvm_stat *kvm)
1085 {
1086 if (kvm->opts.target.pid) {
1087 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1088 if (kvm->pid_list == NULL) {
1089 pr_err("Error parsing process id string\n");
1090 return -EINVAL;
1091 }
1092 }
1093
1094 return 0;
1095 }
1096
1097 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1098 {
1099 int ret = -EINVAL;
1100 int vcpu = kvm->trace_vcpu;
1101
1102 if (parse_target_str(kvm) != 0)
1103 goto exit;
1104
1105 if (!verify_vcpu(vcpu))
1106 goto exit;
1107
1108 if (!select_key(kvm))
1109 goto exit;
1110
1111 if (!register_kvm_events_ops(kvm))
1112 goto exit;
1113
1114 init_kvm_event_record(kvm);
1115 setup_pager();
1116
1117 ret = read_events(kvm);
1118 if (ret)
1119 goto exit;
1120
1121 sort_result(kvm);
1122 print_result(kvm);
1123
1124 exit:
1125 return ret;
1126 }
1127
1128 #define STRDUP_FAIL_EXIT(s) \
1129 ({ char *_p; \
1130 _p = strdup(s); \
1131 if (!_p) \
1132 return -ENOMEM; \
1133 _p; \
1134 })
1135
1136 static int
1137 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1138 {
1139 unsigned int rec_argc, i, j, events_tp_size;
1140 const char **rec_argv;
1141 const char * const record_args[] = {
1142 "record",
1143 "-R",
1144 "-m", "1024",
1145 "-c", "1",
1146 };
1147 const char * const *events_tp;
1148 events_tp_size = 0;
1149
1150 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1151 events_tp_size++;
1152
1153 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1154 2 * events_tp_size;
1155 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1156
1157 if (rec_argv == NULL)
1158 return -ENOMEM;
1159
1160 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1161 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1162
1163 for (j = 0; j < events_tp_size; j++) {
1164 rec_argv[i++] = "-e";
1165 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1166 }
1167
1168 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1169 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1170
1171 for (j = 1; j < (unsigned int)argc; j++, i++)
1172 rec_argv[i] = argv[j];
1173
1174 return cmd_record(i, rec_argv, NULL);
1175 }
1176
1177 static int
1178 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1179 {
1180 const struct option kvm_events_report_options[] = {
1181 OPT_STRING(0, "event", &kvm->report_event, "report event",
1182 "event for reporting: vmexit, "
1183 "mmio (x86 only), ioport (x86 only)"),
1184 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1185 "vcpu id to report"),
1186 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1187 "key for sorting: sample(sort by samples number)"
1188 " time (sort by avg time)"),
1189 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1190 "analyze events only for given process id(s)"),
1191 OPT_END()
1192 };
1193
1194 const char * const kvm_events_report_usage[] = {
1195 "perf kvm stat report [<options>]",
1196 NULL
1197 };
1198
1199 if (argc) {
1200 argc = parse_options(argc, argv,
1201 kvm_events_report_options,
1202 kvm_events_report_usage, 0);
1203 if (argc)
1204 usage_with_options(kvm_events_report_usage,
1205 kvm_events_report_options);
1206 }
1207
1208 if (!kvm->opts.target.pid)
1209 kvm->opts.target.system_wide = true;
1210
1211 return kvm_events_report_vcpu(kvm);
1212 }
1213
1214 #ifdef HAVE_TIMERFD_SUPPORT
1215 static struct perf_evlist *kvm_live_event_list(void)
1216 {
1217 struct perf_evlist *evlist;
1218 char *tp, *name, *sys;
1219 int err = -1;
1220 const char * const *events_tp;
1221
1222 evlist = perf_evlist__new();
1223 if (evlist == NULL)
1224 return NULL;
1225
1226 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1227
1228 tp = strdup(*events_tp);
1229 if (tp == NULL)
1230 goto out;
1231
1232 /* split tracepoint into subsystem and name */
1233 sys = tp;
1234 name = strchr(tp, ':');
1235 if (name == NULL) {
1236 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1237 *events_tp);
1238 free(tp);
1239 goto out;
1240 }
1241 *name = '\0';
1242 name++;
1243
1244 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1245 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1246 free(tp);
1247 goto out;
1248 }
1249
1250 free(tp);
1251 }
1252
1253 err = 0;
1254
1255 out:
1256 if (err) {
1257 perf_evlist__delete(evlist);
1258 evlist = NULL;
1259 }
1260
1261 return evlist;
1262 }
1263
1264 static int kvm_events_live(struct perf_kvm_stat *kvm,
1265 int argc, const char **argv)
1266 {
1267 char errbuf[BUFSIZ];
1268 int err;
1269
1270 const struct option live_options[] = {
1271 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1272 "record events on existing process id"),
1273 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1274 "number of mmap data pages",
1275 perf_evlist__parse_mmap_pages),
1276 OPT_INCR('v', "verbose", &verbose,
1277 "be more verbose (show counter open errors, etc)"),
1278 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1279 "system-wide collection from all CPUs"),
1280 OPT_UINTEGER('d', "display", &kvm->display_time,
1281 "time in seconds between display updates"),
1282 OPT_STRING(0, "event", &kvm->report_event, "report event",
1283 "event for reporting: vmexit, mmio, ioport"),
1284 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1285 "vcpu id to report"),
1286 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1287 "key for sorting: sample(sort by samples number)"
1288 " time (sort by avg time)"),
1289 OPT_U64(0, "duration", &kvm->duration,
1290 "show events other than"
1291 " HLT (x86 only) or Wait state (s390 only)"
1292 " that take longer than duration usecs"),
1293 OPT_END()
1294 };
1295 const char * const live_usage[] = {
1296 "perf kvm stat live [<options>]",
1297 NULL
1298 };
1299 struct perf_data_file file = {
1300 .mode = PERF_DATA_MODE_WRITE,
1301 };
1302
1303
1304 /* event handling */
1305 kvm->tool.sample = process_sample_event;
1306 kvm->tool.comm = perf_event__process_comm;
1307 kvm->tool.exit = perf_event__process_exit;
1308 kvm->tool.fork = perf_event__process_fork;
1309 kvm->tool.lost = process_lost_event;
1310 kvm->tool.ordered_events = true;
1311 perf_tool__fill_defaults(&kvm->tool);
1312
1313 /* set defaults */
1314 kvm->display_time = 1;
1315 kvm->opts.user_interval = 1;
1316 kvm->opts.mmap_pages = 512;
1317 kvm->opts.target.uses_mmap = false;
1318 kvm->opts.target.uid_str = NULL;
1319 kvm->opts.target.uid = UINT_MAX;
1320
1321 symbol__init(NULL);
1322 disable_buildid_cache();
1323
1324 use_browser = 0;
1325 setup_browser(false);
1326
1327 if (argc) {
1328 argc = parse_options(argc, argv, live_options,
1329 live_usage, 0);
1330 if (argc)
1331 usage_with_options(live_usage, live_options);
1332 }
1333
1334 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1335
1336 /*
1337 * target related setups
1338 */
1339 err = target__validate(&kvm->opts.target);
1340 if (err) {
1341 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1342 ui__warning("%s", errbuf);
1343 }
1344
1345 if (target__none(&kvm->opts.target))
1346 kvm->opts.target.system_wide = true;
1347
1348
1349 /*
1350 * generate the event list
1351 */
1352 kvm->evlist = kvm_live_event_list();
1353 if (kvm->evlist == NULL) {
1354 err = -1;
1355 goto out;
1356 }
1357
1358 symbol_conf.nr_events = kvm->evlist->nr_entries;
1359
1360 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1361 usage_with_options(live_usage, live_options);
1362
1363 /*
1364 * perf session
1365 */
1366 kvm->session = perf_session__new(&file, false, &kvm->tool);
1367 if (kvm->session == NULL) {
1368 err = -ENOMEM;
1369 goto out;
1370 }
1371 kvm->session->evlist = kvm->evlist;
1372 perf_session__set_id_hdr_size(kvm->session);
1373 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1374 kvm->evlist->threads, false);
1375 err = kvm_live_open_events(kvm);
1376 if (err)
1377 goto out;
1378
1379 err = kvm_events_live_report(kvm);
1380
1381 out:
1382 exit_browser(0);
1383
1384 if (kvm->session)
1385 perf_session__delete(kvm->session);
1386 kvm->session = NULL;
1387 if (kvm->evlist)
1388 perf_evlist__delete(kvm->evlist);
1389
1390 return err;
1391 }
1392 #endif
1393
1394 static void print_kvm_stat_usage(void)
1395 {
1396 printf("Usage: perf kvm stat <command>\n\n");
1397
1398 printf("# Available commands:\n");
1399 printf("\trecord: record kvm events\n");
1400 printf("\treport: report statistical data of kvm events\n");
1401 printf("\tlive: live reporting of statistical data of kvm events\n");
1402
1403 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1404 }
1405
1406 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1407 {
1408 struct perf_kvm_stat kvm = {
1409 .file_name = file_name,
1410
1411 .trace_vcpu = -1,
1412 .report_event = "vmexit",
1413 .sort_key = "sample",
1414
1415 };
1416
1417 if (argc == 1) {
1418 print_kvm_stat_usage();
1419 goto perf_stat;
1420 }
1421
1422 if (!strncmp(argv[1], "rec", 3))
1423 return kvm_events_record(&kvm, argc - 1, argv + 1);
1424
1425 if (!strncmp(argv[1], "rep", 3))
1426 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1427
1428 #ifdef HAVE_TIMERFD_SUPPORT
1429 if (!strncmp(argv[1], "live", 4))
1430 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1431 #endif
1432
1433 perf_stat:
1434 return cmd_stat(argc, argv, NULL);
1435 }
1436 #endif /* HAVE_KVM_STAT_SUPPORT */
1437
1438 static int __cmd_record(const char *file_name, int argc, const char **argv)
1439 {
1440 int rec_argc, i = 0, j;
1441 const char **rec_argv;
1442
1443 rec_argc = argc + 2;
1444 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1445 rec_argv[i++] = strdup("record");
1446 rec_argv[i++] = strdup("-o");
1447 rec_argv[i++] = strdup(file_name);
1448 for (j = 1; j < argc; j++, i++)
1449 rec_argv[i] = argv[j];
1450
1451 BUG_ON(i != rec_argc);
1452
1453 return cmd_record(i, rec_argv, NULL);
1454 }
1455
1456 static int __cmd_report(const char *file_name, int argc, const char **argv)
1457 {
1458 int rec_argc, i = 0, j;
1459 const char **rec_argv;
1460
1461 rec_argc = argc + 2;
1462 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1463 rec_argv[i++] = strdup("report");
1464 rec_argv[i++] = strdup("-i");
1465 rec_argv[i++] = strdup(file_name);
1466 for (j = 1; j < argc; j++, i++)
1467 rec_argv[i] = argv[j];
1468
1469 BUG_ON(i != rec_argc);
1470
1471 return cmd_report(i, rec_argv, NULL);
1472 }
1473
1474 static int
1475 __cmd_buildid_list(const char *file_name, int argc, const char **argv)
1476 {
1477 int rec_argc, i = 0, j;
1478 const char **rec_argv;
1479
1480 rec_argc = argc + 2;
1481 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1482 rec_argv[i++] = strdup("buildid-list");
1483 rec_argv[i++] = strdup("-i");
1484 rec_argv[i++] = strdup(file_name);
1485 for (j = 1; j < argc; j++, i++)
1486 rec_argv[i] = argv[j];
1487
1488 BUG_ON(i != rec_argc);
1489
1490 return cmd_buildid_list(i, rec_argv, NULL);
1491 }
1492
1493 int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
1494 {
1495 const char *file_name = NULL;
1496 const struct option kvm_options[] = {
1497 OPT_STRING('i', "input", &file_name, "file",
1498 "Input file name"),
1499 OPT_STRING('o', "output", &file_name, "file",
1500 "Output file name"),
1501 OPT_BOOLEAN(0, "guest", &perf_guest,
1502 "Collect guest os data"),
1503 OPT_BOOLEAN(0, "host", &perf_host,
1504 "Collect host os data"),
1505 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1506 "guest mount directory under which every guest os"
1507 " instance has a subdir"),
1508 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1509 "file", "file saving guest os vmlinux"),
1510 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1511 "file", "file saving guest os /proc/kallsyms"),
1512 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1513 "file", "file saving guest os /proc/modules"),
1514 OPT_INCR('v', "verbose", &verbose,
1515 "be more verbose (show counter open errors, etc)"),
1516 OPT_END()
1517 };
1518
1519 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1520 "buildid-list", "stat", NULL };
1521 const char *kvm_usage[] = { NULL, NULL };
1522
1523 perf_host = 0;
1524 perf_guest = 1;
1525
1526 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1527 PARSE_OPT_STOP_AT_NON_OPTION);
1528 if (!argc)
1529 usage_with_options(kvm_usage, kvm_options);
1530
1531 if (!perf_host)
1532 perf_guest = 1;
1533
1534 if (!file_name) {
1535 file_name = get_filename_for_perf_kvm();
1536
1537 if (!file_name) {
1538 pr_err("Failed to allocate memory for filename\n");
1539 return -ENOMEM;
1540 }
1541 }
1542
1543 if (!strncmp(argv[0], "rec", 3))
1544 return __cmd_record(file_name, argc, argv);
1545 else if (!strncmp(argv[0], "rep", 3))
1546 return __cmd_report(file_name, argc, argv);
1547 else if (!strncmp(argv[0], "diff", 4))
1548 return cmd_diff(argc, argv, NULL);
1549 else if (!strncmp(argv[0], "top", 3))
1550 return cmd_top(argc, argv, NULL);
1551 else if (!strncmp(argv[0], "buildid-list", 12))
1552 return __cmd_buildid_list(file_name, argc, argv);
1553 #ifdef HAVE_KVM_STAT_SUPPORT
1554 else if (!strncmp(argv[0], "stat", 4))
1555 return kvm_cmd_stat(file_name, argc, argv);
1556 #endif
1557 else
1558 usage_with_options(kvm_usage, kvm_options);
1559
1560 return 0;
1561 }
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