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Merge tag 'fixes-for-v4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi...
[linux/fpc-iii.git] / tools / perf / builtin-kvm.c
blob0894a817f67e6f5bb8a5d6398c9e2307f010efc6
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(thread) && 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__set_priv(thread, vcpu_record);
390 }
391
392 return thread__priv(thread);
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 int nr_stdin, ret, err = -EINVAL;
900 struct termios save;
901
902 /* live flag must be set first */
903 kvm->live = true;
904
905 ret = cpu_isa_config(kvm);
906 if (ret < 0)
907 return ret;
908
909 if (!verify_vcpu(kvm->trace_vcpu) ||
910 !select_key(kvm) ||
911 !register_kvm_events_ops(kvm)) {
912 goto out;
913 }
914
915 set_term_quiet_input(&save);
916 init_kvm_event_record(kvm);
917
918 signal(SIGINT, sig_handler);
919 signal(SIGTERM, sig_handler);
920
921 /* add timer fd */
922 if (perf_kvm__timerfd_create(kvm) < 0) {
923 err = -1;
924 goto out;
925 }
926
927 if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
928 goto out;
929
930 nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
931 if (nr_stdin < 0)
932 goto out;
933
934 if (fd_set_nonblock(fileno(stdin)) != 0)
935 goto out;
936
937 /* everything is good - enable the events and process */
938 perf_evlist__enable(kvm->evlist);
939
940 while (!done) {
941 struct fdarray *fda = &kvm->evlist->pollfd;
942 int rc;
943
944 rc = perf_kvm__mmap_read(kvm);
945 if (rc < 0)
946 break;
947
948 err = perf_kvm__handle_timerfd(kvm);
949 if (err)
950 goto out;
951
952 if (fda->entries[nr_stdin].revents & POLLIN)
953 done = perf_kvm__handle_stdin();
954
955 if (!rc && !done)
956 err = fdarray__poll(fda, 100);
957 }
958
959 perf_evlist__disable(kvm->evlist);
960
961 if (err == 0) {
962 sort_result(kvm);
963 print_result(kvm);
964 }
965
966 out:
967 if (kvm->timerfd >= 0)
968 close(kvm->timerfd);
969
970 tcsetattr(0, TCSAFLUSH, &save);
971 return err;
972 }
973
974 static int kvm_live_open_events(struct perf_kvm_stat *kvm)
975 {
976 int err, rc = -1;
977 struct perf_evsel *pos;
978 struct perf_evlist *evlist = kvm->evlist;
979 char sbuf[STRERR_BUFSIZE];
980
981 perf_evlist__config(evlist, &kvm->opts);
982
983 /*
984 * Note: exclude_{guest,host} do not apply here.
985 * This command processes KVM tracepoints from host only
986 */
987 evlist__for_each(evlist, pos) {
988 struct perf_event_attr *attr = &pos->attr;
989
990 /* make sure these *are* set */
991 perf_evsel__set_sample_bit(pos, TID);
992 perf_evsel__set_sample_bit(pos, TIME);
993 perf_evsel__set_sample_bit(pos, CPU);
994 perf_evsel__set_sample_bit(pos, RAW);
995 /* make sure these are *not*; want as small a sample as possible */
996 perf_evsel__reset_sample_bit(pos, PERIOD);
997 perf_evsel__reset_sample_bit(pos, IP);
998 perf_evsel__reset_sample_bit(pos, CALLCHAIN);
999 perf_evsel__reset_sample_bit(pos, ADDR);
1000 perf_evsel__reset_sample_bit(pos, READ);
1001 attr->mmap = 0;
1002 attr->comm = 0;
1003 attr->task = 0;
1004
1005 attr->sample_period = 1;
1006
1007 attr->watermark = 0;
1008 attr->wakeup_events = 1000;
1009
1010 /* will enable all once we are ready */
1011 attr->disabled = 1;
1012 }
1013
1014 err = perf_evlist__open(evlist);
1015 if (err < 0) {
1016 printf("Couldn't create the events: %s\n",
1017 strerror_r(errno, sbuf, sizeof(sbuf)));
1018 goto out;
1019 }
1020
1021 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) {
1022 ui__error("Failed to mmap the events: %s\n",
1023 strerror_r(errno, sbuf, sizeof(sbuf)));
1024 perf_evlist__close(evlist);
1025 goto out;
1026 }
1027
1028 rc = 0;
1029
1030 out:
1031 return rc;
1032 }
1033 #endif
1034
1035 static int read_events(struct perf_kvm_stat *kvm)
1036 {
1037 int ret;
1038
1039 struct perf_tool eops = {
1040 .sample = process_sample_event,
1041 .comm = perf_event__process_comm,
1042 .ordered_events = true,
1043 };
1044 struct perf_data_file file = {
1045 .path = kvm->file_name,
1046 .mode = PERF_DATA_MODE_READ,
1047 };
1048
1049 kvm->tool = eops;
1050 kvm->session = perf_session__new(&file, false, &kvm->tool);
1051 if (!kvm->session) {
1052 pr_err("Initializing perf session failed\n");
1053 return -1;
1054 }
1055
1056 symbol__init(&kvm->session->header.env);
1057
1058 if (!perf_session__has_traces(kvm->session, "kvm record"))
1059 return -EINVAL;
1060
1061 /*
1062 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1063 * traced in the old kernel.
1064 */
1065 ret = cpu_isa_config(kvm);
1066 if (ret < 0)
1067 return ret;
1068
1069 return perf_session__process_events(kvm->session, &kvm->tool);
1070 }
1071
1072 static int parse_target_str(struct perf_kvm_stat *kvm)
1073 {
1074 if (kvm->opts.target.pid) {
1075 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1076 if (kvm->pid_list == NULL) {
1077 pr_err("Error parsing process id string\n");
1078 return -EINVAL;
1079 }
1080 }
1081
1082 return 0;
1083 }
1084
1085 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1086 {
1087 int ret = -EINVAL;
1088 int vcpu = kvm->trace_vcpu;
1089
1090 if (parse_target_str(kvm) != 0)
1091 goto exit;
1092
1093 if (!verify_vcpu(vcpu))
1094 goto exit;
1095
1096 if (!select_key(kvm))
1097 goto exit;
1098
1099 if (!register_kvm_events_ops(kvm))
1100 goto exit;
1101
1102 init_kvm_event_record(kvm);
1103 setup_pager();
1104
1105 ret = read_events(kvm);
1106 if (ret)
1107 goto exit;
1108
1109 sort_result(kvm);
1110 print_result(kvm);
1111
1112 exit:
1113 return ret;
1114 }
1115
1116 #define STRDUP_FAIL_EXIT(s) \
1117 ({ char *_p; \
1118 _p = strdup(s); \
1119 if (!_p) \
1120 return -ENOMEM; \
1121 _p; \
1122 })
1123
1124 static int
1125 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1126 {
1127 unsigned int rec_argc, i, j, events_tp_size;
1128 const char **rec_argv;
1129 const char * const record_args[] = {
1130 "record",
1131 "-R",
1132 "-m", "1024",
1133 "-c", "1",
1134 };
1135 const char * const kvm_stat_record_usage[] = {
1136 "perf kvm stat record [<options>]",
1137 NULL
1138 };
1139 const char * const *events_tp;
1140 events_tp_size = 0;
1141
1142 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1143 events_tp_size++;
1144
1145 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1146 2 * events_tp_size;
1147 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1148
1149 if (rec_argv == NULL)
1150 return -ENOMEM;
1151
1152 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1153 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1154
1155 for (j = 0; j < events_tp_size; j++) {
1156 rec_argv[i++] = "-e";
1157 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1158 }
1159
1160 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1161 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1162
1163 for (j = 1; j < (unsigned int)argc; j++, i++)
1164 rec_argv[i] = argv[j];
1165
1166 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1167 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1168 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1169
1170 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1171 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1172 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1173 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1174 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1175 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1176 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1177 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1178 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1179 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1180 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1181 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1182 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1183 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1184 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1185
1186 record_usage = kvm_stat_record_usage;
1187 return cmd_record(i, rec_argv, NULL);
1188 }
1189
1190 static int
1191 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1192 {
1193 const struct option kvm_events_report_options[] = {
1194 OPT_STRING(0, "event", &kvm->report_event, "report event",
1195 "event for reporting: vmexit, "
1196 "mmio (x86 only), ioport (x86 only)"),
1197 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1198 "vcpu id to report"),
1199 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1200 "key for sorting: sample(sort by samples number)"
1201 " time (sort by avg time)"),
1202 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1203 "analyze events only for given process id(s)"),
1204 OPT_END()
1205 };
1206
1207 const char * const kvm_events_report_usage[] = {
1208 "perf kvm stat report [<options>]",
1209 NULL
1210 };
1211
1212 if (argc) {
1213 argc = parse_options(argc, argv,
1214 kvm_events_report_options,
1215 kvm_events_report_usage, 0);
1216 if (argc)
1217 usage_with_options(kvm_events_report_usage,
1218 kvm_events_report_options);
1219 }
1220
1221 if (!kvm->opts.target.pid)
1222 kvm->opts.target.system_wide = true;
1223
1224 return kvm_events_report_vcpu(kvm);
1225 }
1226
1227 #ifdef HAVE_TIMERFD_SUPPORT
1228 static struct perf_evlist *kvm_live_event_list(void)
1229 {
1230 struct perf_evlist *evlist;
1231 char *tp, *name, *sys;
1232 int err = -1;
1233 const char * const *events_tp;
1234
1235 evlist = perf_evlist__new();
1236 if (evlist == NULL)
1237 return NULL;
1238
1239 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1240
1241 tp = strdup(*events_tp);
1242 if (tp == NULL)
1243 goto out;
1244
1245 /* split tracepoint into subsystem and name */
1246 sys = tp;
1247 name = strchr(tp, ':');
1248 if (name == NULL) {
1249 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1250 *events_tp);
1251 free(tp);
1252 goto out;
1253 }
1254 *name = '\0';
1255 name++;
1256
1257 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1258 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1259 free(tp);
1260 goto out;
1261 }
1262
1263 free(tp);
1264 }
1265
1266 err = 0;
1267
1268 out:
1269 if (err) {
1270 perf_evlist__delete(evlist);
1271 evlist = NULL;
1272 }
1273
1274 return evlist;
1275 }
1276
1277 static int kvm_events_live(struct perf_kvm_stat *kvm,
1278 int argc, const char **argv)
1279 {
1280 char errbuf[BUFSIZ];
1281 int err;
1282
1283 const struct option live_options[] = {
1284 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1285 "record events on existing process id"),
1286 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1287 "number of mmap data pages",
1288 perf_evlist__parse_mmap_pages),
1289 OPT_INCR('v', "verbose", &verbose,
1290 "be more verbose (show counter open errors, etc)"),
1291 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1292 "system-wide collection from all CPUs"),
1293 OPT_UINTEGER('d', "display", &kvm->display_time,
1294 "time in seconds between display updates"),
1295 OPT_STRING(0, "event", &kvm->report_event, "report event",
1296 "event for reporting: "
1297 "vmexit, mmio (x86 only), ioport (x86 only)"),
1298 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1299 "vcpu id to report"),
1300 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1301 "key for sorting: sample(sort by samples number)"
1302 " time (sort by avg time)"),
1303 OPT_U64(0, "duration", &kvm->duration,
1304 "show events other than"
1305 " HLT (x86 only) or Wait state (s390 only)"
1306 " that take longer than duration usecs"),
1307 OPT_END()
1308 };
1309 const char * const live_usage[] = {
1310 "perf kvm stat live [<options>]",
1311 NULL
1312 };
1313 struct perf_data_file file = {
1314 .mode = PERF_DATA_MODE_WRITE,
1315 };
1316
1317
1318 /* event handling */
1319 kvm->tool.sample = process_sample_event;
1320 kvm->tool.comm = perf_event__process_comm;
1321 kvm->tool.exit = perf_event__process_exit;
1322 kvm->tool.fork = perf_event__process_fork;
1323 kvm->tool.lost = process_lost_event;
1324 kvm->tool.ordered_events = true;
1325 perf_tool__fill_defaults(&kvm->tool);
1326
1327 /* set defaults */
1328 kvm->display_time = 1;
1329 kvm->opts.user_interval = 1;
1330 kvm->opts.mmap_pages = 512;
1331 kvm->opts.target.uses_mmap = false;
1332 kvm->opts.target.uid_str = NULL;
1333 kvm->opts.target.uid = UINT_MAX;
1334
1335 symbol__init(NULL);
1336 disable_buildid_cache();
1337
1338 use_browser = 0;
1339 setup_browser(false);
1340
1341 if (argc) {
1342 argc = parse_options(argc, argv, live_options,
1343 live_usage, 0);
1344 if (argc)
1345 usage_with_options(live_usage, live_options);
1346 }
1347
1348 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1349
1350 /*
1351 * target related setups
1352 */
1353 err = target__validate(&kvm->opts.target);
1354 if (err) {
1355 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1356 ui__warning("%s", errbuf);
1357 }
1358
1359 if (target__none(&kvm->opts.target))
1360 kvm->opts.target.system_wide = true;
1361
1362
1363 /*
1364 * generate the event list
1365 */
1366 kvm->evlist = kvm_live_event_list();
1367 if (kvm->evlist == NULL) {
1368 err = -1;
1369 goto out;
1370 }
1371
1372 symbol_conf.nr_events = kvm->evlist->nr_entries;
1373
1374 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1375 usage_with_options(live_usage, live_options);
1376
1377 /*
1378 * perf session
1379 */
1380 kvm->session = perf_session__new(&file, false, &kvm->tool);
1381 if (kvm->session == NULL) {
1382 err = -1;
1383 goto out;
1384 }
1385 kvm->session->evlist = kvm->evlist;
1386 perf_session__set_id_hdr_size(kvm->session);
1387 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1388 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1389 kvm->evlist->threads, false);
1390 err = kvm_live_open_events(kvm);
1391 if (err)
1392 goto out;
1393
1394 err = kvm_events_live_report(kvm);
1395
1396 out:
1397 exit_browser(0);
1398
1399 if (kvm->session)
1400 perf_session__delete(kvm->session);
1401 kvm->session = NULL;
1402 if (kvm->evlist)
1403 perf_evlist__delete(kvm->evlist);
1404
1405 return err;
1406 }
1407 #endif
1408
1409 static void print_kvm_stat_usage(void)
1410 {
1411 printf("Usage: perf kvm stat <command>\n\n");
1412
1413 printf("# Available commands:\n");
1414 printf("\trecord: record kvm events\n");
1415 printf("\treport: report statistical data of kvm events\n");
1416 printf("\tlive: live reporting of statistical data of kvm events\n");
1417
1418 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1419 }
1420
1421 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1422 {
1423 struct perf_kvm_stat kvm = {
1424 .file_name = file_name,
1425
1426 .trace_vcpu = -1,
1427 .report_event = "vmexit",
1428 .sort_key = "sample",
1429
1430 };
1431
1432 if (argc == 1) {
1433 print_kvm_stat_usage();
1434 goto perf_stat;
1435 }
1436
1437 if (!strncmp(argv[1], "rec", 3))
1438 return kvm_events_record(&kvm, argc - 1, argv + 1);
1439
1440 if (!strncmp(argv[1], "rep", 3))
1441 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1442
1443 #ifdef HAVE_TIMERFD_SUPPORT
1444 if (!strncmp(argv[1], "live", 4))
1445 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1446 #endif
1447
1448 perf_stat:
1449 return cmd_stat(argc, argv, NULL);
1450 }
1451 #endif /* HAVE_KVM_STAT_SUPPORT */
1452
1453 static int __cmd_record(const char *file_name, int argc, const char **argv)
1454 {
1455 int rec_argc, i = 0, j;
1456 const char **rec_argv;
1457
1458 rec_argc = argc + 2;
1459 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1460 rec_argv[i++] = strdup("record");
1461 rec_argv[i++] = strdup("-o");
1462 rec_argv[i++] = strdup(file_name);
1463 for (j = 1; j < argc; j++, i++)
1464 rec_argv[i] = argv[j];
1465
1466 BUG_ON(i != rec_argc);
1467
1468 return cmd_record(i, rec_argv, NULL);
1469 }
1470
1471 static int __cmd_report(const char *file_name, int argc, const char **argv)
1472 {
1473 int rec_argc, i = 0, j;
1474 const char **rec_argv;
1475
1476 rec_argc = argc + 2;
1477 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1478 rec_argv[i++] = strdup("report");
1479 rec_argv[i++] = strdup("-i");
1480 rec_argv[i++] = strdup(file_name);
1481 for (j = 1; j < argc; j++, i++)
1482 rec_argv[i] = argv[j];
1483
1484 BUG_ON(i != rec_argc);
1485
1486 return cmd_report(i, rec_argv, NULL);
1487 }
1488
1489 static int
1490 __cmd_buildid_list(const char *file_name, int argc, const char **argv)
1491 {
1492 int rec_argc, i = 0, j;
1493 const char **rec_argv;
1494
1495 rec_argc = argc + 2;
1496 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1497 rec_argv[i++] = strdup("buildid-list");
1498 rec_argv[i++] = strdup("-i");
1499 rec_argv[i++] = strdup(file_name);
1500 for (j = 1; j < argc; j++, i++)
1501 rec_argv[i] = argv[j];
1502
1503 BUG_ON(i != rec_argc);
1504
1505 return cmd_buildid_list(i, rec_argv, NULL);
1506 }
1507
1508 int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
1509 {
1510 const char *file_name = NULL;
1511 const struct option kvm_options[] = {
1512 OPT_STRING('i', "input", &file_name, "file",
1513 "Input file name"),
1514 OPT_STRING('o', "output", &file_name, "file",
1515 "Output file name"),
1516 OPT_BOOLEAN(0, "guest", &perf_guest,
1517 "Collect guest os data"),
1518 OPT_BOOLEAN(0, "host", &perf_host,
1519 "Collect host os data"),
1520 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1521 "guest mount directory under which every guest os"
1522 " instance has a subdir"),
1523 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1524 "file", "file saving guest os vmlinux"),
1525 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1526 "file", "file saving guest os /proc/kallsyms"),
1527 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1528 "file", "file saving guest os /proc/modules"),
1529 OPT_INCR('v', "verbose", &verbose,
1530 "be more verbose (show counter open errors, etc)"),
1531 OPT_END()
1532 };
1533
1534 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1535 "buildid-list", "stat", NULL };
1536 const char *kvm_usage[] = { NULL, NULL };
1537
1538 perf_host = 0;
1539 perf_guest = 1;
1540
1541 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1542 PARSE_OPT_STOP_AT_NON_OPTION);
1543 if (!argc)
1544 usage_with_options(kvm_usage, kvm_options);
1545
1546 if (!perf_host)
1547 perf_guest = 1;
1548
1549 if (!file_name) {
1550 file_name = get_filename_for_perf_kvm();
1551
1552 if (!file_name) {
1553 pr_err("Failed to allocate memory for filename\n");
1554 return -ENOMEM;
1555 }
1556 }
1557
1558 if (!strncmp(argv[0], "rec", 3))
1559 return __cmd_record(file_name, argc, argv);
1560 else if (!strncmp(argv[0], "rep", 3))
1561 return __cmd_report(file_name, argc, argv);
1562 else if (!strncmp(argv[0], "diff", 4))
1563 return cmd_diff(argc, argv, NULL);
1564 else if (!strncmp(argv[0], "top", 3))
1565 return cmd_top(argc, argv, NULL);
1566 else if (!strncmp(argv[0], "buildid-list", 12))
1567 return __cmd_buildid_list(file_name, argc, argv);
1568 #ifdef HAVE_KVM_STAT_SUPPORT
1569 else if (!strncmp(argv[0], "stat", 4))
1570 return kvm_cmd_stat(file_name, argc, argv);
1571 #endif
1572 else
1573 usage_with_options(kvm_usage, kvm_options);
1574
1575 return 0;
1576 }
Linux with added FPC-III support