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timers: Reinitialize per cpu bases on hotplug
[linux/fpc-iii.git] / tools / perf / builtin-kvm.c
blob0c36f2ac6a0e0419a61306be7161ea9462b3aead
1 // SPDX-License-Identifier: GPL-2.0
2 #include "builtin.h"
3 #include "perf.h"
4
5 #include "util/evsel.h"
6 #include "util/evlist.h"
7 #include "util/term.h"
8 #include "util/util.h"
9 #include "util/cache.h"
10 #include "util/symbol.h"
11 #include "util/thread.h"
12 #include "util/header.h"
13 #include "util/session.h"
14 #include "util/intlist.h"
15 #include <subcmd/parse-options.h>
16 #include "util/trace-event.h"
17 #include "util/debug.h"
18 #include "util/tool.h"
19 #include "util/stat.h"
20 #include "util/top.h"
21 #include "util/data.h"
22 #include "util/ordered-events.h"
23
24 #include <sys/prctl.h>
25 #ifdef HAVE_TIMERFD_SUPPORT
26 #include <sys/timerfd.h>
27 #endif
28 #include <sys/time.h>
29
30 #include <linux/kernel.h>
31 #include <linux/time64.h>
32 #include <errno.h>
33 #include <inttypes.h>
34 #include <poll.h>
35 #include <termios.h>
36 #include <semaphore.h>
37 #include <signal.h>
38 #include <math.h>
39
40 static const char *get_filename_for_perf_kvm(void)
41 {
42 const char *filename;
43
44 if (perf_host && !perf_guest)
45 filename = strdup("perf.data.host");
46 else if (!perf_host && perf_guest)
47 filename = strdup("perf.data.guest");
48 else
49 filename = strdup("perf.data.kvm");
50
51 return filename;
52 }
53
54 #ifdef HAVE_KVM_STAT_SUPPORT
55 #include "util/kvm-stat.h"
56
57 void exit_event_get_key(struct perf_evsel *evsel,
58 struct perf_sample *sample,
59 struct event_key *key)
60 {
61 key->info = 0;
62 key->key = perf_evsel__intval(evsel, sample, kvm_exit_reason);
63 }
64
65 bool kvm_exit_event(struct perf_evsel *evsel)
66 {
67 return !strcmp(evsel->name, kvm_exit_trace);
68 }
69
70 bool exit_event_begin(struct perf_evsel *evsel,
71 struct perf_sample *sample, struct event_key *key)
72 {
73 if (kvm_exit_event(evsel)) {
74 exit_event_get_key(evsel, sample, key);
75 return true;
76 }
77
78 return false;
79 }
80
81 bool kvm_entry_event(struct perf_evsel *evsel)
82 {
83 return !strcmp(evsel->name, kvm_entry_trace);
84 }
85
86 bool exit_event_end(struct perf_evsel *evsel,
87 struct perf_sample *sample __maybe_unused,
88 struct event_key *key __maybe_unused)
89 {
90 return kvm_entry_event(evsel);
91 }
92
93 static const char *get_exit_reason(struct perf_kvm_stat *kvm,
94 struct exit_reasons_table *tbl,
95 u64 exit_code)
96 {
97 while (tbl->reason != NULL) {
98 if (tbl->exit_code == exit_code)
99 return tbl->reason;
100 tbl++;
101 }
102
103 pr_err("unknown kvm exit code:%lld on %s\n",
104 (unsigned long long)exit_code, kvm->exit_reasons_isa);
105 return "UNKNOWN";
106 }
107
108 void exit_event_decode_key(struct perf_kvm_stat *kvm,
109 struct event_key *key,
110 char *decode)
111 {
112 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
113 key->key);
114
115 scnprintf(decode, decode_str_len, "%s", exit_reason);
116 }
117
118 static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
119 {
120 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
121
122 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) {
123 if (!strcmp(events_ops->name, kvm->report_event)) {
124 kvm->events_ops = events_ops->ops;
125 return true;
126 }
127 }
128
129 return false;
130 }
131
132 struct vcpu_event_record {
133 int vcpu_id;
134 u64 start_time;
135 struct kvm_event *last_event;
136 };
137
138
139 static void init_kvm_event_record(struct perf_kvm_stat *kvm)
140 {
141 unsigned int i;
142
143 for (i = 0; i < EVENTS_CACHE_SIZE; i++)
144 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
145 }
146
147 #ifdef HAVE_TIMERFD_SUPPORT
148 static void clear_events_cache_stats(struct list_head *kvm_events_cache)
149 {
150 struct list_head *head;
151 struct kvm_event *event;
152 unsigned int i;
153 int j;
154
155 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
156 head = &kvm_events_cache[i];
157 list_for_each_entry(event, head, hash_entry) {
158 /* reset stats for event */
159 event->total.time = 0;
160 init_stats(&event->total.stats);
161
162 for (j = 0; j < event->max_vcpu; ++j) {
163 event->vcpu[j].time = 0;
164 init_stats(&event->vcpu[j].stats);
165 }
166 }
167 }
168 }
169 #endif
170
171 static int kvm_events_hash_fn(u64 key)
172 {
173 return key & (EVENTS_CACHE_SIZE - 1);
174 }
175
176 static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
177 {
178 int old_max_vcpu = event->max_vcpu;
179 void *prev;
180
181 if (vcpu_id < event->max_vcpu)
182 return true;
183
184 while (event->max_vcpu <= vcpu_id)
185 event->max_vcpu += DEFAULT_VCPU_NUM;
186
187 prev = event->vcpu;
188 event->vcpu = realloc(event->vcpu,
189 event->max_vcpu * sizeof(*event->vcpu));
190 if (!event->vcpu) {
191 free(prev);
192 pr_err("Not enough memory\n");
193 return false;
194 }
195
196 memset(event->vcpu + old_max_vcpu, 0,
197 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
198 return true;
199 }
200
201 static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
202 {
203 struct kvm_event *event;
204
205 event = zalloc(sizeof(*event));
206 if (!event) {
207 pr_err("Not enough memory\n");
208 return NULL;
209 }
210
211 event->key = *key;
212 init_stats(&event->total.stats);
213 return event;
214 }
215
216 static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
217 struct event_key *key)
218 {
219 struct kvm_event *event;
220 struct list_head *head;
221
222 BUG_ON(key->key == INVALID_KEY);
223
224 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
225 list_for_each_entry(event, head, hash_entry) {
226 if (event->key.key == key->key && event->key.info == key->info)
227 return event;
228 }
229
230 event = kvm_alloc_init_event(key);
231 if (!event)
232 return NULL;
233
234 list_add(&event->hash_entry, head);
235 return event;
236 }
237
238 static bool handle_begin_event(struct perf_kvm_stat *kvm,
239 struct vcpu_event_record *vcpu_record,
240 struct event_key *key, u64 timestamp)
241 {
242 struct kvm_event *event = NULL;
243
244 if (key->key != INVALID_KEY)
245 event = find_create_kvm_event(kvm, key);
246
247 vcpu_record->last_event = event;
248 vcpu_record->start_time = timestamp;
249 return true;
250 }
251
252 static void
253 kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
254 {
255 kvm_stats->time += time_diff;
256 update_stats(&kvm_stats->stats, time_diff);
257 }
258
259 static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
260 {
261 struct kvm_event_stats *kvm_stats = &event->total;
262
263 if (vcpu_id != -1)
264 kvm_stats = &event->vcpu[vcpu_id];
265
266 return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
267 avg_stats(&kvm_stats->stats));
268 }
269
270 static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
271 u64 time_diff)
272 {
273 if (vcpu_id == -1) {
274 kvm_update_event_stats(&event->total, time_diff);
275 return true;
276 }
277
278 if (!kvm_event_expand(event, vcpu_id))
279 return false;
280
281 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
282 return true;
283 }
284
285 static bool is_child_event(struct perf_kvm_stat *kvm,
286 struct perf_evsel *evsel,
287 struct perf_sample *sample,
288 struct event_key *key)
289 {
290 struct child_event_ops *child_ops;
291
292 child_ops = kvm->events_ops->child_ops;
293
294 if (!child_ops)
295 return false;
296
297 for (; child_ops->name; child_ops++) {
298 if (!strcmp(evsel->name, child_ops->name)) {
299 child_ops->get_key(evsel, sample, key);
300 return true;
301 }
302 }
303
304 return false;
305 }
306
307 static bool handle_child_event(struct perf_kvm_stat *kvm,
308 struct vcpu_event_record *vcpu_record,
309 struct event_key *key,
310 struct perf_sample *sample __maybe_unused)
311 {
312 struct kvm_event *event = NULL;
313
314 if (key->key != INVALID_KEY)
315 event = find_create_kvm_event(kvm, key);
316
317 vcpu_record->last_event = event;
318
319 return true;
320 }
321
322 static bool skip_event(const char *event)
323 {
324 const char * const *skip_events;
325
326 for (skip_events = kvm_skip_events; *skip_events; skip_events++)
327 if (!strcmp(event, *skip_events))
328 return true;
329
330 return false;
331 }
332
333 static bool handle_end_event(struct perf_kvm_stat *kvm,
334 struct vcpu_event_record *vcpu_record,
335 struct event_key *key,
336 struct perf_sample *sample)
337 {
338 struct kvm_event *event;
339 u64 time_begin, time_diff;
340 int vcpu;
341
342 if (kvm->trace_vcpu == -1)
343 vcpu = -1;
344 else
345 vcpu = vcpu_record->vcpu_id;
346
347 event = vcpu_record->last_event;
348 time_begin = vcpu_record->start_time;
349
350 /* The begin event is not caught. */
351 if (!time_begin)
352 return true;
353
354 /*
355 * In some case, the 'begin event' only records the start timestamp,
356 * the actual event is recognized in the 'end event' (e.g. mmio-event).
357 */
358
359 /* Both begin and end events did not get the key. */
360 if (!event && key->key == INVALID_KEY)
361 return true;
362
363 if (!event)
364 event = find_create_kvm_event(kvm, key);
365
366 if (!event)
367 return false;
368
369 vcpu_record->last_event = NULL;
370 vcpu_record->start_time = 0;
371
372 /* seems to happen once in a while during live mode */
373 if (sample->time < time_begin) {
374 pr_debug("End time before begin time; skipping event.\n");
375 return true;
376 }
377
378 time_diff = sample->time - time_begin;
379
380 if (kvm->duration && time_diff > kvm->duration) {
381 char decode[decode_str_len];
382
383 kvm->events_ops->decode_key(kvm, &event->key, decode);
384 if (!skip_event(decode)) {
385 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
386 sample->time, sample->pid, vcpu_record->vcpu_id,
387 decode, time_diff / NSEC_PER_USEC);
388 }
389 }
390
391 return update_kvm_event(event, vcpu, time_diff);
392 }
393
394 static
395 struct vcpu_event_record *per_vcpu_record(struct thread *thread,
396 struct perf_evsel *evsel,
397 struct perf_sample *sample)
398 {
399 /* Only kvm_entry records vcpu id. */
400 if (!thread__priv(thread) && kvm_entry_event(evsel)) {
401 struct vcpu_event_record *vcpu_record;
402
403 vcpu_record = zalloc(sizeof(*vcpu_record));
404 if (!vcpu_record) {
405 pr_err("%s: Not enough memory\n", __func__);
406 return NULL;
407 }
408
409 vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample,
410 vcpu_id_str);
411 thread__set_priv(thread, vcpu_record);
412 }
413
414 return thread__priv(thread);
415 }
416
417 static bool handle_kvm_event(struct perf_kvm_stat *kvm,
418 struct thread *thread,
419 struct perf_evsel *evsel,
420 struct perf_sample *sample)
421 {
422 struct vcpu_event_record *vcpu_record;
423 struct event_key key = { .key = INVALID_KEY,
424 .exit_reasons = kvm->exit_reasons };
425
426 vcpu_record = per_vcpu_record(thread, evsel, sample);
427 if (!vcpu_record)
428 return true;
429
430 /* only process events for vcpus user cares about */
431 if ((kvm->trace_vcpu != -1) &&
432 (kvm->trace_vcpu != vcpu_record->vcpu_id))
433 return true;
434
435 if (kvm->events_ops->is_begin_event(evsel, sample, &key))
436 return handle_begin_event(kvm, vcpu_record, &key, sample->time);
437
438 if (is_child_event(kvm, evsel, sample, &key))
439 return handle_child_event(kvm, vcpu_record, &key, sample);
440
441 if (kvm->events_ops->is_end_event(evsel, sample, &key))
442 return handle_end_event(kvm, vcpu_record, &key, sample);
443
444 return true;
445 }
446
447 #define GET_EVENT_KEY(func, field) \
448 static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
449 { \
450 if (vcpu == -1) \
451 return event->total.field; \
452 \
453 if (vcpu >= event->max_vcpu) \
454 return 0; \
455 \
456 return event->vcpu[vcpu].field; \
457 }
458
459 #define COMPARE_EVENT_KEY(func, field) \
460 GET_EVENT_KEY(func, field) \
461 static int compare_kvm_event_ ## func(struct kvm_event *one, \
462 struct kvm_event *two, int vcpu)\
463 { \
464 return get_event_ ##func(one, vcpu) > \
465 get_event_ ##func(two, vcpu); \
466 }
467
468 GET_EVENT_KEY(time, time);
469 COMPARE_EVENT_KEY(count, stats.n);
470 COMPARE_EVENT_KEY(mean, stats.mean);
471 GET_EVENT_KEY(max, stats.max);
472 GET_EVENT_KEY(min, stats.min);
473
474 #define DEF_SORT_NAME_KEY(name, compare_key) \
475 { #name, compare_kvm_event_ ## compare_key }
476
477 static struct kvm_event_key keys[] = {
478 DEF_SORT_NAME_KEY(sample, count),
479 DEF_SORT_NAME_KEY(time, mean),
480 { NULL, NULL }
481 };
482
483 static bool select_key(struct perf_kvm_stat *kvm)
484 {
485 int i;
486
487 for (i = 0; keys[i].name; i++) {
488 if (!strcmp(keys[i].name, kvm->sort_key)) {
489 kvm->compare = keys[i].key;
490 return true;
491 }
492 }
493
494 pr_err("Unknown compare key:%s\n", kvm->sort_key);
495 return false;
496 }
497
498 static void insert_to_result(struct rb_root *result, struct kvm_event *event,
499 key_cmp_fun bigger, int vcpu)
500 {
501 struct rb_node **rb = &result->rb_node;
502 struct rb_node *parent = NULL;
503 struct kvm_event *p;
504
505 while (*rb) {
506 p = container_of(*rb, struct kvm_event, rb);
507 parent = *rb;
508
509 if (bigger(event, p, vcpu))
510 rb = &(*rb)->rb_left;
511 else
512 rb = &(*rb)->rb_right;
513 }
514
515 rb_link_node(&event->rb, parent, rb);
516 rb_insert_color(&event->rb, result);
517 }
518
519 static void
520 update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
521 {
522 int vcpu = kvm->trace_vcpu;
523
524 kvm->total_count += get_event_count(event, vcpu);
525 kvm->total_time += get_event_time(event, vcpu);
526 }
527
528 static bool event_is_valid(struct kvm_event *event, int vcpu)
529 {
530 return !!get_event_count(event, vcpu);
531 }
532
533 static void sort_result(struct perf_kvm_stat *kvm)
534 {
535 unsigned int i;
536 int vcpu = kvm->trace_vcpu;
537 struct kvm_event *event;
538
539 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
540 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
541 if (event_is_valid(event, vcpu)) {
542 update_total_count(kvm, event);
543 insert_to_result(&kvm->result, event,
544 kvm->compare, vcpu);
545 }
546 }
547 }
548 }
549
550 /* returns left most element of result, and erase it */
551 static struct kvm_event *pop_from_result(struct rb_root *result)
552 {
553 struct rb_node *node = rb_first(result);
554
555 if (!node)
556 return NULL;
557
558 rb_erase(node, result);
559 return container_of(node, struct kvm_event, rb);
560 }
561
562 static void print_vcpu_info(struct perf_kvm_stat *kvm)
563 {
564 int vcpu = kvm->trace_vcpu;
565
566 pr_info("Analyze events for ");
567
568 if (kvm->opts.target.system_wide)
569 pr_info("all VMs, ");
570 else if (kvm->opts.target.pid)
571 pr_info("pid(s) %s, ", kvm->opts.target.pid);
572 else
573 pr_info("dazed and confused on what is monitored, ");
574
575 if (vcpu == -1)
576 pr_info("all VCPUs:\n\n");
577 else
578 pr_info("VCPU %d:\n\n", vcpu);
579 }
580
581 static void show_timeofday(void)
582 {
583 char date[64];
584 struct timeval tv;
585 struct tm ltime;
586
587 gettimeofday(&tv, NULL);
588 if (localtime_r(&tv.tv_sec, &ltime)) {
589 strftime(date, sizeof(date), "%H:%M:%S", &ltime);
590 pr_info("%s.%06ld", date, tv.tv_usec);
591 } else
592 pr_info("00:00:00.000000");
593
594 return;
595 }
596
597 static void print_result(struct perf_kvm_stat *kvm)
598 {
599 char decode[decode_str_len];
600 struct kvm_event *event;
601 int vcpu = kvm->trace_vcpu;
602
603 if (kvm->live) {
604 puts(CONSOLE_CLEAR);
605 show_timeofday();
606 }
607
608 pr_info("\n\n");
609 print_vcpu_info(kvm);
610 pr_info("%*s ", decode_str_len, kvm->events_ops->name);
611 pr_info("%10s ", "Samples");
612 pr_info("%9s ", "Samples%");
613
614 pr_info("%9s ", "Time%");
615 pr_info("%11s ", "Min Time");
616 pr_info("%11s ", "Max Time");
617 pr_info("%16s ", "Avg time");
618 pr_info("\n\n");
619
620 while ((event = pop_from_result(&kvm->result))) {
621 u64 ecount, etime, max, min;
622
623 ecount = get_event_count(event, vcpu);
624 etime = get_event_time(event, vcpu);
625 max = get_event_max(event, vcpu);
626 min = get_event_min(event, vcpu);
627
628 kvm->events_ops->decode_key(kvm, &event->key, decode);
629 pr_info("%*s ", decode_str_len, decode);
630 pr_info("%10llu ", (unsigned long long)ecount);
631 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
632 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
633 pr_info("%9.2fus ", (double)min / NSEC_PER_USEC);
634 pr_info("%9.2fus ", (double)max / NSEC_PER_USEC);
635 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount / NSEC_PER_USEC,
636 kvm_event_rel_stddev(vcpu, event));
637 pr_info("\n");
638 }
639
640 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
641 kvm->total_count, kvm->total_time / (double)NSEC_PER_USEC);
642
643 if (kvm->lost_events)
644 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
645 }
646
647 #ifdef HAVE_TIMERFD_SUPPORT
648 static int process_lost_event(struct perf_tool *tool,
649 union perf_event *event __maybe_unused,
650 struct perf_sample *sample __maybe_unused,
651 struct machine *machine __maybe_unused)
652 {
653 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
654
655 kvm->lost_events++;
656 return 0;
657 }
658 #endif
659
660 static bool skip_sample(struct perf_kvm_stat *kvm,
661 struct perf_sample *sample)
662 {
663 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
664 return true;
665
666 return false;
667 }
668
669 static int process_sample_event(struct perf_tool *tool,
670 union perf_event *event,
671 struct perf_sample *sample,
672 struct perf_evsel *evsel,
673 struct machine *machine)
674 {
675 int err = 0;
676 struct thread *thread;
677 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
678 tool);
679
680 if (skip_sample(kvm, sample))
681 return 0;
682
683 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
684 if (thread == NULL) {
685 pr_debug("problem processing %d event, skipping it.\n",
686 event->header.type);
687 return -1;
688 }
689
690 if (!handle_kvm_event(kvm, thread, evsel, sample))
691 err = -1;
692
693 thread__put(thread);
694 return err;
695 }
696
697 static int cpu_isa_config(struct perf_kvm_stat *kvm)
698 {
699 char buf[64], *cpuid;
700 int err;
701
702 if (kvm->live) {
703 err = get_cpuid(buf, sizeof(buf));
704 if (err != 0) {
705 pr_err("Failed to look up CPU type\n");
706 return err;
707 }
708 cpuid = buf;
709 } else
710 cpuid = kvm->session->header.env.cpuid;
711
712 if (!cpuid) {
713 pr_err("Failed to look up CPU type\n");
714 return -EINVAL;
715 }
716
717 err = cpu_isa_init(kvm, cpuid);
718 if (err == -ENOTSUP)
719 pr_err("CPU %s is not supported.\n", cpuid);
720
721 return err;
722 }
723
724 static bool verify_vcpu(int vcpu)
725 {
726 if (vcpu != -1 && vcpu < 0) {
727 pr_err("Invalid vcpu:%d.\n", vcpu);
728 return false;
729 }
730
731 return true;
732 }
733
734 #ifdef HAVE_TIMERFD_SUPPORT
735 /* keeping the max events to a modest level to keep
736 * the processing of samples per mmap smooth.
737 */
738 #define PERF_KVM__MAX_EVENTS_PER_MMAP 25
739
740 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
741 u64 *mmap_time)
742 {
743 union perf_event *event;
744 struct perf_sample sample;
745 s64 n = 0;
746 int err;
747
748 *mmap_time = ULLONG_MAX;
749 while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) {
750 err = perf_evlist__parse_sample(kvm->evlist, event, &sample);
751 if (err) {
752 perf_evlist__mmap_consume(kvm->evlist, idx);
753 pr_err("Failed to parse sample\n");
754 return -1;
755 }
756
757 err = perf_session__queue_event(kvm->session, event, &sample, 0);
758 /*
759 * FIXME: Here we can't consume the event, as perf_session__queue_event will
760 * point to it, and it'll get possibly overwritten by the kernel.
761 */
762 perf_evlist__mmap_consume(kvm->evlist, idx);
763
764 if (err) {
765 pr_err("Failed to enqueue sample: %d\n", err);
766 return -1;
767 }
768
769 /* save time stamp of our first sample for this mmap */
770 if (n == 0)
771 *mmap_time = sample.time;
772
773 /* limit events per mmap handled all at once */
774 n++;
775 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
776 break;
777 }
778
779 return n;
780 }
781
782 static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
783 {
784 int i, err, throttled = 0;
785 s64 n, ntotal = 0;
786 u64 flush_time = ULLONG_MAX, mmap_time;
787
788 for (i = 0; i < kvm->evlist->nr_mmaps; i++) {
789 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
790 if (n < 0)
791 return -1;
792
793 /* flush time is going to be the minimum of all the individual
794 * mmap times. Essentially, we flush all the samples queued up
795 * from the last pass under our minimal start time -- that leaves
796 * a very small race for samples to come in with a lower timestamp.
797 * The ioctl to return the perf_clock timestamp should close the
798 * race entirely.
799 */
800 if (mmap_time < flush_time)
801 flush_time = mmap_time;
802
803 ntotal += n;
804 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
805 throttled = 1;
806 }
807
808 /* flush queue after each round in which we processed events */
809 if (ntotal) {
810 struct ordered_events *oe = &kvm->session->ordered_events;
811
812 oe->next_flush = flush_time;
813 err = ordered_events__flush(oe, OE_FLUSH__ROUND);
814 if (err) {
815 if (kvm->lost_events)
816 pr_info("\nLost events: %" PRIu64 "\n\n",
817 kvm->lost_events);
818 return err;
819 }
820 }
821
822 return throttled;
823 }
824
825 static volatile int done;
826
827 static void sig_handler(int sig __maybe_unused)
828 {
829 done = 1;
830 }
831
832 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
833 {
834 struct itimerspec new_value;
835 int rc = -1;
836
837 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
838 if (kvm->timerfd < 0) {
839 pr_err("timerfd_create failed\n");
840 goto out;
841 }
842
843 new_value.it_value.tv_sec = kvm->display_time;
844 new_value.it_value.tv_nsec = 0;
845 new_value.it_interval.tv_sec = kvm->display_time;
846 new_value.it_interval.tv_nsec = 0;
847
848 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
849 pr_err("timerfd_settime failed: %d\n", errno);
850 close(kvm->timerfd);
851 goto out;
852 }
853
854 rc = 0;
855 out:
856 return rc;
857 }
858
859 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
860 {
861 uint64_t c;
862 int rc;
863
864 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
865 if (rc < 0) {
866 if (errno == EAGAIN)
867 return 0;
868
869 pr_err("Failed to read timer fd: %d\n", errno);
870 return -1;
871 }
872
873 if (rc != sizeof(uint64_t)) {
874 pr_err("Error reading timer fd - invalid size returned\n");
875 return -1;
876 }
877
878 if (c != 1)
879 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
880
881 /* update display */
882 sort_result(kvm);
883 print_result(kvm);
884
885 /* reset counts */
886 clear_events_cache_stats(kvm->kvm_events_cache);
887 kvm->total_count = 0;
888 kvm->total_time = 0;
889 kvm->lost_events = 0;
890
891 return 0;
892 }
893
894 static int fd_set_nonblock(int fd)
895 {
896 long arg = 0;
897
898 arg = fcntl(fd, F_GETFL);
899 if (arg < 0) {
900 pr_err("Failed to get current flags for fd %d\n", fd);
901 return -1;
902 }
903
904 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
905 pr_err("Failed to set non-block option on fd %d\n", fd);
906 return -1;
907 }
908
909 return 0;
910 }
911
912 static int perf_kvm__handle_stdin(void)
913 {
914 int c;
915
916 c = getc(stdin);
917 if (c == 'q')
918 return 1;
919
920 return 0;
921 }
922
923 static int kvm_events_live_report(struct perf_kvm_stat *kvm)
924 {
925 int nr_stdin, ret, err = -EINVAL;
926 struct termios save;
927
928 /* live flag must be set first */
929 kvm->live = true;
930
931 ret = cpu_isa_config(kvm);
932 if (ret < 0)
933 return ret;
934
935 if (!verify_vcpu(kvm->trace_vcpu) ||
936 !select_key(kvm) ||
937 !register_kvm_events_ops(kvm)) {
938 goto out;
939 }
940
941 set_term_quiet_input(&save);
942 init_kvm_event_record(kvm);
943
944 signal(SIGINT, sig_handler);
945 signal(SIGTERM, sig_handler);
946
947 /* add timer fd */
948 if (perf_kvm__timerfd_create(kvm) < 0) {
949 err = -1;
950 goto out;
951 }
952
953 if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
954 goto out;
955
956 nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
957 if (nr_stdin < 0)
958 goto out;
959
960 if (fd_set_nonblock(fileno(stdin)) != 0)
961 goto out;
962
963 /* everything is good - enable the events and process */
964 perf_evlist__enable(kvm->evlist);
965
966 while (!done) {
967 struct fdarray *fda = &kvm->evlist->pollfd;
968 int rc;
969
970 rc = perf_kvm__mmap_read(kvm);
971 if (rc < 0)
972 break;
973
974 err = perf_kvm__handle_timerfd(kvm);
975 if (err)
976 goto out;
977
978 if (fda->entries[nr_stdin].revents & POLLIN)
979 done = perf_kvm__handle_stdin();
980
981 if (!rc && !done)
982 err = fdarray__poll(fda, 100);
983 }
984
985 perf_evlist__disable(kvm->evlist);
986
987 if (err == 0) {
988 sort_result(kvm);
989 print_result(kvm);
990 }
991
992 out:
993 if (kvm->timerfd >= 0)
994 close(kvm->timerfd);
995
996 tcsetattr(0, TCSAFLUSH, &save);
997 return err;
998 }
999
1000 static int kvm_live_open_events(struct perf_kvm_stat *kvm)
1001 {
1002 int err, rc = -1;
1003 struct perf_evsel *pos;
1004 struct perf_evlist *evlist = kvm->evlist;
1005 char sbuf[STRERR_BUFSIZE];
1006
1007 perf_evlist__config(evlist, &kvm->opts, NULL);
1008
1009 /*
1010 * Note: exclude_{guest,host} do not apply here.
1011 * This command processes KVM tracepoints from host only
1012 */
1013 evlist__for_each_entry(evlist, pos) {
1014 struct perf_event_attr *attr = &pos->attr;
1015
1016 /* make sure these *are* set */
1017 perf_evsel__set_sample_bit(pos, TID);
1018 perf_evsel__set_sample_bit(pos, TIME);
1019 perf_evsel__set_sample_bit(pos, CPU);
1020 perf_evsel__set_sample_bit(pos, RAW);
1021 /* make sure these are *not*; want as small a sample as possible */
1022 perf_evsel__reset_sample_bit(pos, PERIOD);
1023 perf_evsel__reset_sample_bit(pos, IP);
1024 perf_evsel__reset_sample_bit(pos, CALLCHAIN);
1025 perf_evsel__reset_sample_bit(pos, ADDR);
1026 perf_evsel__reset_sample_bit(pos, READ);
1027 attr->mmap = 0;
1028 attr->comm = 0;
1029 attr->task = 0;
1030
1031 attr->sample_period = 1;
1032
1033 attr->watermark = 0;
1034 attr->wakeup_events = 1000;
1035
1036 /* will enable all once we are ready */
1037 attr->disabled = 1;
1038 }
1039
1040 err = perf_evlist__open(evlist);
1041 if (err < 0) {
1042 printf("Couldn't create the events: %s\n",
1043 str_error_r(errno, sbuf, sizeof(sbuf)));
1044 goto out;
1045 }
1046
1047 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) {
1048 ui__error("Failed to mmap the events: %s\n",
1049 str_error_r(errno, sbuf, sizeof(sbuf)));
1050 perf_evlist__close(evlist);
1051 goto out;
1052 }
1053
1054 rc = 0;
1055
1056 out:
1057 return rc;
1058 }
1059 #endif
1060
1061 static int read_events(struct perf_kvm_stat *kvm)
1062 {
1063 int ret;
1064
1065 struct perf_tool eops = {
1066 .sample = process_sample_event,
1067 .comm = perf_event__process_comm,
1068 .namespaces = perf_event__process_namespaces,
1069 .ordered_events = true,
1070 };
1071 struct perf_data file = {
1072 .file = {
1073 .path = kvm->file_name,
1074 },
1075 .mode = PERF_DATA_MODE_READ,
1076 .force = kvm->force,
1077 };
1078
1079 kvm->tool = eops;
1080 kvm->session = perf_session__new(&file, false, &kvm->tool);
1081 if (!kvm->session) {
1082 pr_err("Initializing perf session failed\n");
1083 return -1;
1084 }
1085
1086 symbol__init(&kvm->session->header.env);
1087
1088 if (!perf_session__has_traces(kvm->session, "kvm record")) {
1089 ret = -EINVAL;
1090 goto out_delete;
1091 }
1092
1093 /*
1094 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1095 * traced in the old kernel.
1096 */
1097 ret = cpu_isa_config(kvm);
1098 if (ret < 0)
1099 goto out_delete;
1100
1101 ret = perf_session__process_events(kvm->session);
1102
1103 out_delete:
1104 perf_session__delete(kvm->session);
1105 return ret;
1106 }
1107
1108 static int parse_target_str(struct perf_kvm_stat *kvm)
1109 {
1110 if (kvm->opts.target.pid) {
1111 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1112 if (kvm->pid_list == NULL) {
1113 pr_err("Error parsing process id string\n");
1114 return -EINVAL;
1115 }
1116 }
1117
1118 return 0;
1119 }
1120
1121 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1122 {
1123 int ret = -EINVAL;
1124 int vcpu = kvm->trace_vcpu;
1125
1126 if (parse_target_str(kvm) != 0)
1127 goto exit;
1128
1129 if (!verify_vcpu(vcpu))
1130 goto exit;
1131
1132 if (!select_key(kvm))
1133 goto exit;
1134
1135 if (!register_kvm_events_ops(kvm))
1136 goto exit;
1137
1138 init_kvm_event_record(kvm);
1139 setup_pager();
1140
1141 ret = read_events(kvm);
1142 if (ret)
1143 goto exit;
1144
1145 sort_result(kvm);
1146 print_result(kvm);
1147
1148 exit:
1149 return ret;
1150 }
1151
1152 #define STRDUP_FAIL_EXIT(s) \
1153 ({ char *_p; \
1154 _p = strdup(s); \
1155 if (!_p) \
1156 return -ENOMEM; \
1157 _p; \
1158 })
1159
1160 int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1161 {
1162 return 0;
1163 }
1164
1165 static int
1166 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1167 {
1168 unsigned int rec_argc, i, j, events_tp_size;
1169 const char **rec_argv;
1170 const char * const record_args[] = {
1171 "record",
1172 "-R",
1173 "-m", "1024",
1174 "-c", "1",
1175 };
1176 const char * const kvm_stat_record_usage[] = {
1177 "perf kvm stat record [<options>]",
1178 NULL
1179 };
1180 const char * const *events_tp;
1181 int ret;
1182
1183 events_tp_size = 0;
1184 ret = setup_kvm_events_tp(kvm);
1185 if (ret < 0) {
1186 pr_err("Unable to setup the kvm tracepoints\n");
1187 return ret;
1188 }
1189
1190 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1191 events_tp_size++;
1192
1193 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1194 2 * events_tp_size;
1195 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1196
1197 if (rec_argv == NULL)
1198 return -ENOMEM;
1199
1200 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1201 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1202
1203 for (j = 0; j < events_tp_size; j++) {
1204 rec_argv[i++] = "-e";
1205 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1206 }
1207
1208 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1209 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1210
1211 for (j = 1; j < (unsigned int)argc; j++, i++)
1212 rec_argv[i] = argv[j];
1213
1214 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1215 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1216 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1217
1218 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1219 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1220 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1221 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1222 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1223 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1224 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1225 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1226 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1227 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1228 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1229 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1230 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1231 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1232 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1233
1234 record_usage = kvm_stat_record_usage;
1235 return cmd_record(i, rec_argv);
1236 }
1237
1238 static int
1239 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1240 {
1241 const struct option kvm_events_report_options[] = {
1242 OPT_STRING(0, "event", &kvm->report_event, "report event",
1243 "event for reporting: vmexit, "
1244 "mmio (x86 only), ioport (x86 only)"),
1245 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1246 "vcpu id to report"),
1247 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1248 "key for sorting: sample(sort by samples number)"
1249 " time (sort by avg time)"),
1250 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1251 "analyze events only for given process id(s)"),
1252 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
1253 OPT_END()
1254 };
1255
1256 const char * const kvm_events_report_usage[] = {
1257 "perf kvm stat report [<options>]",
1258 NULL
1259 };
1260
1261 if (argc) {
1262 argc = parse_options(argc, argv,
1263 kvm_events_report_options,
1264 kvm_events_report_usage, 0);
1265 if (argc)
1266 usage_with_options(kvm_events_report_usage,
1267 kvm_events_report_options);
1268 }
1269
1270 if (!kvm->opts.target.pid)
1271 kvm->opts.target.system_wide = true;
1272
1273 return kvm_events_report_vcpu(kvm);
1274 }
1275
1276 #ifdef HAVE_TIMERFD_SUPPORT
1277 static struct perf_evlist *kvm_live_event_list(void)
1278 {
1279 struct perf_evlist *evlist;
1280 char *tp, *name, *sys;
1281 int err = -1;
1282 const char * const *events_tp;
1283
1284 evlist = perf_evlist__new();
1285 if (evlist == NULL)
1286 return NULL;
1287
1288 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1289
1290 tp = strdup(*events_tp);
1291 if (tp == NULL)
1292 goto out;
1293
1294 /* split tracepoint into subsystem and name */
1295 sys = tp;
1296 name = strchr(tp, ':');
1297 if (name == NULL) {
1298 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1299 *events_tp);
1300 free(tp);
1301 goto out;
1302 }
1303 *name = '\0';
1304 name++;
1305
1306 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1307 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1308 free(tp);
1309 goto out;
1310 }
1311
1312 free(tp);
1313 }
1314
1315 err = 0;
1316
1317 out:
1318 if (err) {
1319 perf_evlist__delete(evlist);
1320 evlist = NULL;
1321 }
1322
1323 return evlist;
1324 }
1325
1326 static int kvm_events_live(struct perf_kvm_stat *kvm,
1327 int argc, const char **argv)
1328 {
1329 char errbuf[BUFSIZ];
1330 int err;
1331
1332 const struct option live_options[] = {
1333 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1334 "record events on existing process id"),
1335 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1336 "number of mmap data pages",
1337 perf_evlist__parse_mmap_pages),
1338 OPT_INCR('v', "verbose", &verbose,
1339 "be more verbose (show counter open errors, etc)"),
1340 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1341 "system-wide collection from all CPUs"),
1342 OPT_UINTEGER('d', "display", &kvm->display_time,
1343 "time in seconds between display updates"),
1344 OPT_STRING(0, "event", &kvm->report_event, "report event",
1345 "event for reporting: "
1346 "vmexit, mmio (x86 only), ioport (x86 only)"),
1347 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1348 "vcpu id to report"),
1349 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1350 "key for sorting: sample(sort by samples number)"
1351 " time (sort by avg time)"),
1352 OPT_U64(0, "duration", &kvm->duration,
1353 "show events other than"
1354 " HLT (x86 only) or Wait state (s390 only)"
1355 " that take longer than duration usecs"),
1356 OPT_UINTEGER(0, "proc-map-timeout", &kvm->opts.proc_map_timeout,
1357 "per thread proc mmap processing timeout in ms"),
1358 OPT_END()
1359 };
1360 const char * const live_usage[] = {
1361 "perf kvm stat live [<options>]",
1362 NULL
1363 };
1364 struct perf_data data = {
1365 .mode = PERF_DATA_MODE_WRITE,
1366 };
1367
1368
1369 /* event handling */
1370 kvm->tool.sample = process_sample_event;
1371 kvm->tool.comm = perf_event__process_comm;
1372 kvm->tool.exit = perf_event__process_exit;
1373 kvm->tool.fork = perf_event__process_fork;
1374 kvm->tool.lost = process_lost_event;
1375 kvm->tool.namespaces = perf_event__process_namespaces;
1376 kvm->tool.ordered_events = true;
1377 perf_tool__fill_defaults(&kvm->tool);
1378
1379 /* set defaults */
1380 kvm->display_time = 1;
1381 kvm->opts.user_interval = 1;
1382 kvm->opts.mmap_pages = 512;
1383 kvm->opts.target.uses_mmap = false;
1384 kvm->opts.target.uid_str = NULL;
1385 kvm->opts.target.uid = UINT_MAX;
1386 kvm->opts.proc_map_timeout = 500;
1387
1388 symbol__init(NULL);
1389 disable_buildid_cache();
1390
1391 use_browser = 0;
1392
1393 if (argc) {
1394 argc = parse_options(argc, argv, live_options,
1395 live_usage, 0);
1396 if (argc)
1397 usage_with_options(live_usage, live_options);
1398 }
1399
1400 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1401
1402 /*
1403 * target related setups
1404 */
1405 err = target__validate(&kvm->opts.target);
1406 if (err) {
1407 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1408 ui__warning("%s", errbuf);
1409 }
1410
1411 if (target__none(&kvm->opts.target))
1412 kvm->opts.target.system_wide = true;
1413
1414
1415 /*
1416 * generate the event list
1417 */
1418 err = setup_kvm_events_tp(kvm);
1419 if (err < 0) {
1420 pr_err("Unable to setup the kvm tracepoints\n");
1421 return err;
1422 }
1423
1424 kvm->evlist = kvm_live_event_list();
1425 if (kvm->evlist == NULL) {
1426 err = -1;
1427 goto out;
1428 }
1429
1430 symbol_conf.nr_events = kvm->evlist->nr_entries;
1431
1432 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1433 usage_with_options(live_usage, live_options);
1434
1435 /*
1436 * perf session
1437 */
1438 kvm->session = perf_session__new(&data, false, &kvm->tool);
1439 if (kvm->session == NULL) {
1440 err = -1;
1441 goto out;
1442 }
1443 kvm->session->evlist = kvm->evlist;
1444 perf_session__set_id_hdr_size(kvm->session);
1445 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1446 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1447 kvm->evlist->threads, false,
1448 kvm->opts.proc_map_timeout, 1);
1449 err = kvm_live_open_events(kvm);
1450 if (err)
1451 goto out;
1452
1453 err = kvm_events_live_report(kvm);
1454
1455 out:
1456 perf_session__delete(kvm->session);
1457 kvm->session = NULL;
1458 perf_evlist__delete(kvm->evlist);
1459
1460 return err;
1461 }
1462 #endif
1463
1464 static void print_kvm_stat_usage(void)
1465 {
1466 printf("Usage: perf kvm stat <command>\n\n");
1467
1468 printf("# Available commands:\n");
1469 printf("\trecord: record kvm events\n");
1470 printf("\treport: report statistical data of kvm events\n");
1471 printf("\tlive: live reporting of statistical data of kvm events\n");
1472
1473 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1474 }
1475
1476 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1477 {
1478 struct perf_kvm_stat kvm = {
1479 .file_name = file_name,
1480
1481 .trace_vcpu = -1,
1482 .report_event = "vmexit",
1483 .sort_key = "sample",
1484
1485 };
1486
1487 if (argc == 1) {
1488 print_kvm_stat_usage();
1489 goto perf_stat;
1490 }
1491
1492 if (!strncmp(argv[1], "rec", 3))
1493 return kvm_events_record(&kvm, argc - 1, argv + 1);
1494
1495 if (!strncmp(argv[1], "rep", 3))
1496 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1497
1498 #ifdef HAVE_TIMERFD_SUPPORT
1499 if (!strncmp(argv[1], "live", 4))
1500 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1501 #endif
1502
1503 perf_stat:
1504 return cmd_stat(argc, argv);
1505 }
1506 #endif /* HAVE_KVM_STAT_SUPPORT */
1507
1508 static int __cmd_record(const char *file_name, int argc, const char **argv)
1509 {
1510 int rec_argc, i = 0, j;
1511 const char **rec_argv;
1512
1513 rec_argc = argc + 2;
1514 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1515 rec_argv[i++] = strdup("record");
1516 rec_argv[i++] = strdup("-o");
1517 rec_argv[i++] = strdup(file_name);
1518 for (j = 1; j < argc; j++, i++)
1519 rec_argv[i] = argv[j];
1520
1521 BUG_ON(i != rec_argc);
1522
1523 return cmd_record(i, rec_argv);
1524 }
1525
1526 static int __cmd_report(const char *file_name, int argc, const char **argv)
1527 {
1528 int rec_argc, i = 0, j;
1529 const char **rec_argv;
1530
1531 rec_argc = argc + 2;
1532 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1533 rec_argv[i++] = strdup("report");
1534 rec_argv[i++] = strdup("-i");
1535 rec_argv[i++] = strdup(file_name);
1536 for (j = 1; j < argc; j++, i++)
1537 rec_argv[i] = argv[j];
1538
1539 BUG_ON(i != rec_argc);
1540
1541 return cmd_report(i, rec_argv);
1542 }
1543
1544 static int
1545 __cmd_buildid_list(const char *file_name, int argc, const char **argv)
1546 {
1547 int rec_argc, i = 0, j;
1548 const char **rec_argv;
1549
1550 rec_argc = argc + 2;
1551 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1552 rec_argv[i++] = strdup("buildid-list");
1553 rec_argv[i++] = strdup("-i");
1554 rec_argv[i++] = strdup(file_name);
1555 for (j = 1; j < argc; j++, i++)
1556 rec_argv[i] = argv[j];
1557
1558 BUG_ON(i != rec_argc);
1559
1560 return cmd_buildid_list(i, rec_argv);
1561 }
1562
1563 int cmd_kvm(int argc, const char **argv)
1564 {
1565 const char *file_name = NULL;
1566 const struct option kvm_options[] = {
1567 OPT_STRING('i', "input", &file_name, "file",
1568 "Input file name"),
1569 OPT_STRING('o', "output", &file_name, "file",
1570 "Output file name"),
1571 OPT_BOOLEAN(0, "guest", &perf_guest,
1572 "Collect guest os data"),
1573 OPT_BOOLEAN(0, "host", &perf_host,
1574 "Collect host os data"),
1575 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1576 "guest mount directory under which every guest os"
1577 " instance has a subdir"),
1578 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1579 "file", "file saving guest os vmlinux"),
1580 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1581 "file", "file saving guest os /proc/kallsyms"),
1582 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1583 "file", "file saving guest os /proc/modules"),
1584 OPT_INCR('v', "verbose", &verbose,
1585 "be more verbose (show counter open errors, etc)"),
1586 OPT_END()
1587 };
1588
1589 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1590 "buildid-list", "stat", NULL };
1591 const char *kvm_usage[] = { NULL, NULL };
1592
1593 perf_host = 0;
1594 perf_guest = 1;
1595
1596 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1597 PARSE_OPT_STOP_AT_NON_OPTION);
1598 if (!argc)
1599 usage_with_options(kvm_usage, kvm_options);
1600
1601 if (!perf_host)
1602 perf_guest = 1;
1603
1604 if (!file_name) {
1605 file_name = get_filename_for_perf_kvm();
1606
1607 if (!file_name) {
1608 pr_err("Failed to allocate memory for filename\n");
1609 return -ENOMEM;
1610 }
1611 }
1612
1613 if (!strncmp(argv[0], "rec", 3))
1614 return __cmd_record(file_name, argc, argv);
1615 else if (!strncmp(argv[0], "rep", 3))
1616 return __cmd_report(file_name, argc, argv);
1617 else if (!strncmp(argv[0], "diff", 4))
1618 return cmd_diff(argc, argv);
1619 else if (!strncmp(argv[0], "top", 3))
1620 return cmd_top(argc, argv);
1621 else if (!strncmp(argv[0], "buildid-list", 12))
1622 return __cmd_buildid_list(file_name, argc, argv);
1623 #ifdef HAVE_KVM_STAT_SUPPORT
1624 else if (!strncmp(argv[0], "stat", 4))
1625 return kvm_cmd_stat(file_name, argc, argv);
1626 #endif
1627 else
1628 usage_with_options(kvm_usage, kvm_options);
1629
1630 return 0;
1631 }
Linux with added FPC-III support