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Linux 5.1.15
[linux/fpc-iii.git] / tools / perf / builtin-kvm.c
blobdbb6f737a3e237485cb0f47d0aa83b655c25b119
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 #include <sys/types.h>
30 #include <sys/stat.h>
31 #include <fcntl.h>
32
33 #include <linux/kernel.h>
34 #include <linux/time64.h>
35 #include <errno.h>
36 #include <inttypes.h>
37 #include <poll.h>
38 #include <termios.h>
39 #include <semaphore.h>
40 #include <signal.h>
41 #include <math.h>
42
43 static const char *get_filename_for_perf_kvm(void)
44 {
45 const char *filename;
46
47 if (perf_host && !perf_guest)
48 filename = strdup("perf.data.host");
49 else if (!perf_host && perf_guest)
50 filename = strdup("perf.data.guest");
51 else
52 filename = strdup("perf.data.kvm");
53
54 return filename;
55 }
56
57 #ifdef HAVE_KVM_STAT_SUPPORT
58 #include "util/kvm-stat.h"
59
60 void exit_event_get_key(struct perf_evsel *evsel,
61 struct perf_sample *sample,
62 struct event_key *key)
63 {
64 key->info = 0;
65 key->key = perf_evsel__intval(evsel, sample, kvm_exit_reason);
66 }
67
68 bool kvm_exit_event(struct perf_evsel *evsel)
69 {
70 return !strcmp(evsel->name, kvm_exit_trace);
71 }
72
73 bool exit_event_begin(struct perf_evsel *evsel,
74 struct perf_sample *sample, struct event_key *key)
75 {
76 if (kvm_exit_event(evsel)) {
77 exit_event_get_key(evsel, sample, key);
78 return true;
79 }
80
81 return false;
82 }
83
84 bool kvm_entry_event(struct perf_evsel *evsel)
85 {
86 return !strcmp(evsel->name, kvm_entry_trace);
87 }
88
89 bool exit_event_end(struct perf_evsel *evsel,
90 struct perf_sample *sample __maybe_unused,
91 struct event_key *key __maybe_unused)
92 {
93 return kvm_entry_event(evsel);
94 }
95
96 static const char *get_exit_reason(struct perf_kvm_stat *kvm,
97 struct exit_reasons_table *tbl,
98 u64 exit_code)
99 {
100 while (tbl->reason != NULL) {
101 if (tbl->exit_code == exit_code)
102 return tbl->reason;
103 tbl++;
104 }
105
106 pr_err("unknown kvm exit code:%lld on %s\n",
107 (unsigned long long)exit_code, kvm->exit_reasons_isa);
108 return "UNKNOWN";
109 }
110
111 void exit_event_decode_key(struct perf_kvm_stat *kvm,
112 struct event_key *key,
113 char *decode)
114 {
115 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
116 key->key);
117
118 scnprintf(decode, decode_str_len, "%s", exit_reason);
119 }
120
121 static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
122 {
123 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
124
125 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) {
126 if (!strcmp(events_ops->name, kvm->report_event)) {
127 kvm->events_ops = events_ops->ops;
128 return true;
129 }
130 }
131
132 return false;
133 }
134
135 struct vcpu_event_record {
136 int vcpu_id;
137 u64 start_time;
138 struct kvm_event *last_event;
139 };
140
141
142 static void init_kvm_event_record(struct perf_kvm_stat *kvm)
143 {
144 unsigned int i;
145
146 for (i = 0; i < EVENTS_CACHE_SIZE; i++)
147 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
148 }
149
150 #ifdef HAVE_TIMERFD_SUPPORT
151 static void clear_events_cache_stats(struct list_head *kvm_events_cache)
152 {
153 struct list_head *head;
154 struct kvm_event *event;
155 unsigned int i;
156 int j;
157
158 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
159 head = &kvm_events_cache[i];
160 list_for_each_entry(event, head, hash_entry) {
161 /* reset stats for event */
162 event->total.time = 0;
163 init_stats(&event->total.stats);
164
165 for (j = 0; j < event->max_vcpu; ++j) {
166 event->vcpu[j].time = 0;
167 init_stats(&event->vcpu[j].stats);
168 }
169 }
170 }
171 }
172 #endif
173
174 static int kvm_events_hash_fn(u64 key)
175 {
176 return key & (EVENTS_CACHE_SIZE - 1);
177 }
178
179 static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
180 {
181 int old_max_vcpu = event->max_vcpu;
182 void *prev;
183
184 if (vcpu_id < event->max_vcpu)
185 return true;
186
187 while (event->max_vcpu <= vcpu_id)
188 event->max_vcpu += DEFAULT_VCPU_NUM;
189
190 prev = event->vcpu;
191 event->vcpu = realloc(event->vcpu,
192 event->max_vcpu * sizeof(*event->vcpu));
193 if (!event->vcpu) {
194 free(prev);
195 pr_err("Not enough memory\n");
196 return false;
197 }
198
199 memset(event->vcpu + old_max_vcpu, 0,
200 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
201 return true;
202 }
203
204 static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
205 {
206 struct kvm_event *event;
207
208 event = zalloc(sizeof(*event));
209 if (!event) {
210 pr_err("Not enough memory\n");
211 return NULL;
212 }
213
214 event->key = *key;
215 init_stats(&event->total.stats);
216 return event;
217 }
218
219 static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
220 struct event_key *key)
221 {
222 struct kvm_event *event;
223 struct list_head *head;
224
225 BUG_ON(key->key == INVALID_KEY);
226
227 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
228 list_for_each_entry(event, head, hash_entry) {
229 if (event->key.key == key->key && event->key.info == key->info)
230 return event;
231 }
232
233 event = kvm_alloc_init_event(key);
234 if (!event)
235 return NULL;
236
237 list_add(&event->hash_entry, head);
238 return event;
239 }
240
241 static bool handle_begin_event(struct perf_kvm_stat *kvm,
242 struct vcpu_event_record *vcpu_record,
243 struct event_key *key, u64 timestamp)
244 {
245 struct kvm_event *event = NULL;
246
247 if (key->key != INVALID_KEY)
248 event = find_create_kvm_event(kvm, key);
249
250 vcpu_record->last_event = event;
251 vcpu_record->start_time = timestamp;
252 return true;
253 }
254
255 static void
256 kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
257 {
258 kvm_stats->time += time_diff;
259 update_stats(&kvm_stats->stats, time_diff);
260 }
261
262 static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
263 {
264 struct kvm_event_stats *kvm_stats = &event->total;
265
266 if (vcpu_id != -1)
267 kvm_stats = &event->vcpu[vcpu_id];
268
269 return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
270 avg_stats(&kvm_stats->stats));
271 }
272
273 static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
274 u64 time_diff)
275 {
276 if (vcpu_id == -1) {
277 kvm_update_event_stats(&event->total, time_diff);
278 return true;
279 }
280
281 if (!kvm_event_expand(event, vcpu_id))
282 return false;
283
284 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
285 return true;
286 }
287
288 static bool is_child_event(struct perf_kvm_stat *kvm,
289 struct perf_evsel *evsel,
290 struct perf_sample *sample,
291 struct event_key *key)
292 {
293 struct child_event_ops *child_ops;
294
295 child_ops = kvm->events_ops->child_ops;
296
297 if (!child_ops)
298 return false;
299
300 for (; child_ops->name; child_ops++) {
301 if (!strcmp(evsel->name, child_ops->name)) {
302 child_ops->get_key(evsel, sample, key);
303 return true;
304 }
305 }
306
307 return false;
308 }
309
310 static bool handle_child_event(struct perf_kvm_stat *kvm,
311 struct vcpu_event_record *vcpu_record,
312 struct event_key *key,
313 struct perf_sample *sample __maybe_unused)
314 {
315 struct kvm_event *event = NULL;
316
317 if (key->key != INVALID_KEY)
318 event = find_create_kvm_event(kvm, key);
319
320 vcpu_record->last_event = event;
321
322 return true;
323 }
324
325 static bool skip_event(const char *event)
326 {
327 const char * const *skip_events;
328
329 for (skip_events = kvm_skip_events; *skip_events; skip_events++)
330 if (!strcmp(event, *skip_events))
331 return true;
332
333 return false;
334 }
335
336 static bool handle_end_event(struct perf_kvm_stat *kvm,
337 struct vcpu_event_record *vcpu_record,
338 struct event_key *key,
339 struct perf_sample *sample)
340 {
341 struct kvm_event *event;
342 u64 time_begin, time_diff;
343 int vcpu;
344
345 if (kvm->trace_vcpu == -1)
346 vcpu = -1;
347 else
348 vcpu = vcpu_record->vcpu_id;
349
350 event = vcpu_record->last_event;
351 time_begin = vcpu_record->start_time;
352
353 /* The begin event is not caught. */
354 if (!time_begin)
355 return true;
356
357 /*
358 * In some case, the 'begin event' only records the start timestamp,
359 * the actual event is recognized in the 'end event' (e.g. mmio-event).
360 */
361
362 /* Both begin and end events did not get the key. */
363 if (!event && key->key == INVALID_KEY)
364 return true;
365
366 if (!event)
367 event = find_create_kvm_event(kvm, key);
368
369 if (!event)
370 return false;
371
372 vcpu_record->last_event = NULL;
373 vcpu_record->start_time = 0;
374
375 /* seems to happen once in a while during live mode */
376 if (sample->time < time_begin) {
377 pr_debug("End time before begin time; skipping event.\n");
378 return true;
379 }
380
381 time_diff = sample->time - time_begin;
382
383 if (kvm->duration && time_diff > kvm->duration) {
384 char decode[decode_str_len];
385
386 kvm->events_ops->decode_key(kvm, &event->key, decode);
387 if (!skip_event(decode)) {
388 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
389 sample->time, sample->pid, vcpu_record->vcpu_id,
390 decode, time_diff / NSEC_PER_USEC);
391 }
392 }
393
394 return update_kvm_event(event, vcpu, time_diff);
395 }
396
397 static
398 struct vcpu_event_record *per_vcpu_record(struct thread *thread,
399 struct perf_evsel *evsel,
400 struct perf_sample *sample)
401 {
402 /* Only kvm_entry records vcpu id. */
403 if (!thread__priv(thread) && kvm_entry_event(evsel)) {
404 struct vcpu_event_record *vcpu_record;
405
406 vcpu_record = zalloc(sizeof(*vcpu_record));
407 if (!vcpu_record) {
408 pr_err("%s: Not enough memory\n", __func__);
409 return NULL;
410 }
411
412 vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample,
413 vcpu_id_str);
414 thread__set_priv(thread, vcpu_record);
415 }
416
417 return thread__priv(thread);
418 }
419
420 static bool handle_kvm_event(struct perf_kvm_stat *kvm,
421 struct thread *thread,
422 struct perf_evsel *evsel,
423 struct perf_sample *sample)
424 {
425 struct vcpu_event_record *vcpu_record;
426 struct event_key key = { .key = INVALID_KEY,
427 .exit_reasons = kvm->exit_reasons };
428
429 vcpu_record = per_vcpu_record(thread, evsel, sample);
430 if (!vcpu_record)
431 return true;
432
433 /* only process events for vcpus user cares about */
434 if ((kvm->trace_vcpu != -1) &&
435 (kvm->trace_vcpu != vcpu_record->vcpu_id))
436 return true;
437
438 if (kvm->events_ops->is_begin_event(evsel, sample, &key))
439 return handle_begin_event(kvm, vcpu_record, &key, sample->time);
440
441 if (is_child_event(kvm, evsel, sample, &key))
442 return handle_child_event(kvm, vcpu_record, &key, sample);
443
444 if (kvm->events_ops->is_end_event(evsel, sample, &key))
445 return handle_end_event(kvm, vcpu_record, &key, sample);
446
447 return true;
448 }
449
450 #define GET_EVENT_KEY(func, field) \
451 static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
452 { \
453 if (vcpu == -1) \
454 return event->total.field; \
455 \
456 if (vcpu >= event->max_vcpu) \
457 return 0; \
458 \
459 return event->vcpu[vcpu].field; \
460 }
461
462 #define COMPARE_EVENT_KEY(func, field) \
463 GET_EVENT_KEY(func, field) \
464 static int compare_kvm_event_ ## func(struct kvm_event *one, \
465 struct kvm_event *two, int vcpu)\
466 { \
467 return get_event_ ##func(one, vcpu) > \
468 get_event_ ##func(two, vcpu); \
469 }
470
471 GET_EVENT_KEY(time, time);
472 COMPARE_EVENT_KEY(count, stats.n);
473 COMPARE_EVENT_KEY(mean, stats.mean);
474 GET_EVENT_KEY(max, stats.max);
475 GET_EVENT_KEY(min, stats.min);
476
477 #define DEF_SORT_NAME_KEY(name, compare_key) \
478 { #name, compare_kvm_event_ ## compare_key }
479
480 static struct kvm_event_key keys[] = {
481 DEF_SORT_NAME_KEY(sample, count),
482 DEF_SORT_NAME_KEY(time, mean),
483 { NULL, NULL }
484 };
485
486 static bool select_key(struct perf_kvm_stat *kvm)
487 {
488 int i;
489
490 for (i = 0; keys[i].name; i++) {
491 if (!strcmp(keys[i].name, kvm->sort_key)) {
492 kvm->compare = keys[i].key;
493 return true;
494 }
495 }
496
497 pr_err("Unknown compare key:%s\n", kvm->sort_key);
498 return false;
499 }
500
501 static void insert_to_result(struct rb_root *result, struct kvm_event *event,
502 key_cmp_fun bigger, int vcpu)
503 {
504 struct rb_node **rb = &result->rb_node;
505 struct rb_node *parent = NULL;
506 struct kvm_event *p;
507
508 while (*rb) {
509 p = container_of(*rb, struct kvm_event, rb);
510 parent = *rb;
511
512 if (bigger(event, p, vcpu))
513 rb = &(*rb)->rb_left;
514 else
515 rb = &(*rb)->rb_right;
516 }
517
518 rb_link_node(&event->rb, parent, rb);
519 rb_insert_color(&event->rb, result);
520 }
521
522 static void
523 update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
524 {
525 int vcpu = kvm->trace_vcpu;
526
527 kvm->total_count += get_event_count(event, vcpu);
528 kvm->total_time += get_event_time(event, vcpu);
529 }
530
531 static bool event_is_valid(struct kvm_event *event, int vcpu)
532 {
533 return !!get_event_count(event, vcpu);
534 }
535
536 static void sort_result(struct perf_kvm_stat *kvm)
537 {
538 unsigned int i;
539 int vcpu = kvm->trace_vcpu;
540 struct kvm_event *event;
541
542 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
543 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
544 if (event_is_valid(event, vcpu)) {
545 update_total_count(kvm, event);
546 insert_to_result(&kvm->result, event,
547 kvm->compare, vcpu);
548 }
549 }
550 }
551 }
552
553 /* returns left most element of result, and erase it */
554 static struct kvm_event *pop_from_result(struct rb_root *result)
555 {
556 struct rb_node *node = rb_first(result);
557
558 if (!node)
559 return NULL;
560
561 rb_erase(node, result);
562 return container_of(node, struct kvm_event, rb);
563 }
564
565 static void print_vcpu_info(struct perf_kvm_stat *kvm)
566 {
567 int vcpu = kvm->trace_vcpu;
568
569 pr_info("Analyze events for ");
570
571 if (kvm->opts.target.system_wide)
572 pr_info("all VMs, ");
573 else if (kvm->opts.target.pid)
574 pr_info("pid(s) %s, ", kvm->opts.target.pid);
575 else
576 pr_info("dazed and confused on what is monitored, ");
577
578 if (vcpu == -1)
579 pr_info("all VCPUs:\n\n");
580 else
581 pr_info("VCPU %d:\n\n", vcpu);
582 }
583
584 static void show_timeofday(void)
585 {
586 char date[64];
587 struct timeval tv;
588 struct tm ltime;
589
590 gettimeofday(&tv, NULL);
591 if (localtime_r(&tv.tv_sec, &ltime)) {
592 strftime(date, sizeof(date), "%H:%M:%S", &ltime);
593 pr_info("%s.%06ld", date, tv.tv_usec);
594 } else
595 pr_info("00:00:00.000000");
596
597 return;
598 }
599
600 static void print_result(struct perf_kvm_stat *kvm)
601 {
602 char decode[decode_str_len];
603 struct kvm_event *event;
604 int vcpu = kvm->trace_vcpu;
605
606 if (kvm->live) {
607 puts(CONSOLE_CLEAR);
608 show_timeofday();
609 }
610
611 pr_info("\n\n");
612 print_vcpu_info(kvm);
613 pr_info("%*s ", decode_str_len, kvm->events_ops->name);
614 pr_info("%10s ", "Samples");
615 pr_info("%9s ", "Samples%");
616
617 pr_info("%9s ", "Time%");
618 pr_info("%11s ", "Min Time");
619 pr_info("%11s ", "Max Time");
620 pr_info("%16s ", "Avg time");
621 pr_info("\n\n");
622
623 while ((event = pop_from_result(&kvm->result))) {
624 u64 ecount, etime, max, min;
625
626 ecount = get_event_count(event, vcpu);
627 etime = get_event_time(event, vcpu);
628 max = get_event_max(event, vcpu);
629 min = get_event_min(event, vcpu);
630
631 kvm->events_ops->decode_key(kvm, &event->key, decode);
632 pr_info("%*s ", decode_str_len, decode);
633 pr_info("%10llu ", (unsigned long long)ecount);
634 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
635 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
636 pr_info("%9.2fus ", (double)min / NSEC_PER_USEC);
637 pr_info("%9.2fus ", (double)max / NSEC_PER_USEC);
638 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount / NSEC_PER_USEC,
639 kvm_event_rel_stddev(vcpu, event));
640 pr_info("\n");
641 }
642
643 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
644 kvm->total_count, kvm->total_time / (double)NSEC_PER_USEC);
645
646 if (kvm->lost_events)
647 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
648 }
649
650 #ifdef HAVE_TIMERFD_SUPPORT
651 static int process_lost_event(struct perf_tool *tool,
652 union perf_event *event __maybe_unused,
653 struct perf_sample *sample __maybe_unused,
654 struct machine *machine __maybe_unused)
655 {
656 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
657
658 kvm->lost_events++;
659 return 0;
660 }
661 #endif
662
663 static bool skip_sample(struct perf_kvm_stat *kvm,
664 struct perf_sample *sample)
665 {
666 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
667 return true;
668
669 return false;
670 }
671
672 static int process_sample_event(struct perf_tool *tool,
673 union perf_event *event,
674 struct perf_sample *sample,
675 struct perf_evsel *evsel,
676 struct machine *machine)
677 {
678 int err = 0;
679 struct thread *thread;
680 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
681 tool);
682
683 if (skip_sample(kvm, sample))
684 return 0;
685
686 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
687 if (thread == NULL) {
688 pr_debug("problem processing %d event, skipping it.\n",
689 event->header.type);
690 return -1;
691 }
692
693 if (!handle_kvm_event(kvm, thread, evsel, sample))
694 err = -1;
695
696 thread__put(thread);
697 return err;
698 }
699
700 static int cpu_isa_config(struct perf_kvm_stat *kvm)
701 {
702 char buf[64], *cpuid;
703 int err;
704
705 if (kvm->live) {
706 err = get_cpuid(buf, sizeof(buf));
707 if (err != 0) {
708 pr_err("Failed to look up CPU type\n");
709 return err;
710 }
711 cpuid = buf;
712 } else
713 cpuid = kvm->session->header.env.cpuid;
714
715 if (!cpuid) {
716 pr_err("Failed to look up CPU type\n");
717 return -EINVAL;
718 }
719
720 err = cpu_isa_init(kvm, cpuid);
721 if (err == -ENOTSUP)
722 pr_err("CPU %s is not supported.\n", cpuid);
723
724 return err;
725 }
726
727 static bool verify_vcpu(int vcpu)
728 {
729 if (vcpu != -1 && vcpu < 0) {
730 pr_err("Invalid vcpu:%d.\n", vcpu);
731 return false;
732 }
733
734 return true;
735 }
736
737 #ifdef HAVE_TIMERFD_SUPPORT
738 /* keeping the max events to a modest level to keep
739 * the processing of samples per mmap smooth.
740 */
741 #define PERF_KVM__MAX_EVENTS_PER_MMAP 25
742
743 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
744 u64 *mmap_time)
745 {
746 struct perf_evlist *evlist = kvm->evlist;
747 union perf_event *event;
748 struct perf_mmap *md;
749 u64 timestamp;
750 s64 n = 0;
751 int err;
752
753 *mmap_time = ULLONG_MAX;
754 md = &evlist->mmap[idx];
755 err = perf_mmap__read_init(md);
756 if (err < 0)
757 return (err == -EAGAIN) ? 0 : -1;
758
759 while ((event = perf_mmap__read_event(md)) != NULL) {
760 err = perf_evlist__parse_sample_timestamp(evlist, event, &timestamp);
761 if (err) {
762 perf_mmap__consume(md);
763 pr_err("Failed to parse sample\n");
764 return -1;
765 }
766
767 err = perf_session__queue_event(kvm->session, event, timestamp, 0);
768 /*
769 * FIXME: Here we can't consume the event, as perf_session__queue_event will
770 * point to it, and it'll get possibly overwritten by the kernel.
771 */
772 perf_mmap__consume(md);
773
774 if (err) {
775 pr_err("Failed to enqueue sample: %d\n", err);
776 return -1;
777 }
778
779 /* save time stamp of our first sample for this mmap */
780 if (n == 0)
781 *mmap_time = timestamp;
782
783 /* limit events per mmap handled all at once */
784 n++;
785 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
786 break;
787 }
788
789 perf_mmap__read_done(md);
790 return n;
791 }
792
793 static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
794 {
795 int i, err, throttled = 0;
796 s64 n, ntotal = 0;
797 u64 flush_time = ULLONG_MAX, mmap_time;
798
799 for (i = 0; i < kvm->evlist->nr_mmaps; i++) {
800 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
801 if (n < 0)
802 return -1;
803
804 /* flush time is going to be the minimum of all the individual
805 * mmap times. Essentially, we flush all the samples queued up
806 * from the last pass under our minimal start time -- that leaves
807 * a very small race for samples to come in with a lower timestamp.
808 * The ioctl to return the perf_clock timestamp should close the
809 * race entirely.
810 */
811 if (mmap_time < flush_time)
812 flush_time = mmap_time;
813
814 ntotal += n;
815 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
816 throttled = 1;
817 }
818
819 /* flush queue after each round in which we processed events */
820 if (ntotal) {
821 struct ordered_events *oe = &kvm->session->ordered_events;
822
823 oe->next_flush = flush_time;
824 err = ordered_events__flush(oe, OE_FLUSH__ROUND);
825 if (err) {
826 if (kvm->lost_events)
827 pr_info("\nLost events: %" PRIu64 "\n\n",
828 kvm->lost_events);
829 return err;
830 }
831 }
832
833 return throttled;
834 }
835
836 static volatile int done;
837
838 static void sig_handler(int sig __maybe_unused)
839 {
840 done = 1;
841 }
842
843 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
844 {
845 struct itimerspec new_value;
846 int rc = -1;
847
848 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
849 if (kvm->timerfd < 0) {
850 pr_err("timerfd_create failed\n");
851 goto out;
852 }
853
854 new_value.it_value.tv_sec = kvm->display_time;
855 new_value.it_value.tv_nsec = 0;
856 new_value.it_interval.tv_sec = kvm->display_time;
857 new_value.it_interval.tv_nsec = 0;
858
859 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
860 pr_err("timerfd_settime failed: %d\n", errno);
861 close(kvm->timerfd);
862 goto out;
863 }
864
865 rc = 0;
866 out:
867 return rc;
868 }
869
870 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
871 {
872 uint64_t c;
873 int rc;
874
875 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
876 if (rc < 0) {
877 if (errno == EAGAIN)
878 return 0;
879
880 pr_err("Failed to read timer fd: %d\n", errno);
881 return -1;
882 }
883
884 if (rc != sizeof(uint64_t)) {
885 pr_err("Error reading timer fd - invalid size returned\n");
886 return -1;
887 }
888
889 if (c != 1)
890 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
891
892 /* update display */
893 sort_result(kvm);
894 print_result(kvm);
895
896 /* reset counts */
897 clear_events_cache_stats(kvm->kvm_events_cache);
898 kvm->total_count = 0;
899 kvm->total_time = 0;
900 kvm->lost_events = 0;
901
902 return 0;
903 }
904
905 static int fd_set_nonblock(int fd)
906 {
907 long arg = 0;
908
909 arg = fcntl(fd, F_GETFL);
910 if (arg < 0) {
911 pr_err("Failed to get current flags for fd %d\n", fd);
912 return -1;
913 }
914
915 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
916 pr_err("Failed to set non-block option on fd %d\n", fd);
917 return -1;
918 }
919
920 return 0;
921 }
922
923 static int perf_kvm__handle_stdin(void)
924 {
925 int c;
926
927 c = getc(stdin);
928 if (c == 'q')
929 return 1;
930
931 return 0;
932 }
933
934 static int kvm_events_live_report(struct perf_kvm_stat *kvm)
935 {
936 int nr_stdin, ret, err = -EINVAL;
937 struct termios save;
938
939 /* live flag must be set first */
940 kvm->live = true;
941
942 ret = cpu_isa_config(kvm);
943 if (ret < 0)
944 return ret;
945
946 if (!verify_vcpu(kvm->trace_vcpu) ||
947 !select_key(kvm) ||
948 !register_kvm_events_ops(kvm)) {
949 goto out;
950 }
951
952 set_term_quiet_input(&save);
953 init_kvm_event_record(kvm);
954
955 signal(SIGINT, sig_handler);
956 signal(SIGTERM, sig_handler);
957
958 /* add timer fd */
959 if (perf_kvm__timerfd_create(kvm) < 0) {
960 err = -1;
961 goto out;
962 }
963
964 if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
965 goto out;
966
967 nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
968 if (nr_stdin < 0)
969 goto out;
970
971 if (fd_set_nonblock(fileno(stdin)) != 0)
972 goto out;
973
974 /* everything is good - enable the events and process */
975 perf_evlist__enable(kvm->evlist);
976
977 while (!done) {
978 struct fdarray *fda = &kvm->evlist->pollfd;
979 int rc;
980
981 rc = perf_kvm__mmap_read(kvm);
982 if (rc < 0)
983 break;
984
985 err = perf_kvm__handle_timerfd(kvm);
986 if (err)
987 goto out;
988
989 if (fda->entries[nr_stdin].revents & POLLIN)
990 done = perf_kvm__handle_stdin();
991
992 if (!rc && !done)
993 err = fdarray__poll(fda, 100);
994 }
995
996 perf_evlist__disable(kvm->evlist);
997
998 if (err == 0) {
999 sort_result(kvm);
1000 print_result(kvm);
1001 }
1002
1003 out:
1004 if (kvm->timerfd >= 0)
1005 close(kvm->timerfd);
1006
1007 tcsetattr(0, TCSAFLUSH, &save);
1008 return err;
1009 }
1010
1011 static int kvm_live_open_events(struct perf_kvm_stat *kvm)
1012 {
1013 int err, rc = -1;
1014 struct perf_evsel *pos;
1015 struct perf_evlist *evlist = kvm->evlist;
1016 char sbuf[STRERR_BUFSIZE];
1017
1018 perf_evlist__config(evlist, &kvm->opts, NULL);
1019
1020 /*
1021 * Note: exclude_{guest,host} do not apply here.
1022 * This command processes KVM tracepoints from host only
1023 */
1024 evlist__for_each_entry(evlist, pos) {
1025 struct perf_event_attr *attr = &pos->attr;
1026
1027 /* make sure these *are* set */
1028 perf_evsel__set_sample_bit(pos, TID);
1029 perf_evsel__set_sample_bit(pos, TIME);
1030 perf_evsel__set_sample_bit(pos, CPU);
1031 perf_evsel__set_sample_bit(pos, RAW);
1032 /* make sure these are *not*; want as small a sample as possible */
1033 perf_evsel__reset_sample_bit(pos, PERIOD);
1034 perf_evsel__reset_sample_bit(pos, IP);
1035 perf_evsel__reset_sample_bit(pos, CALLCHAIN);
1036 perf_evsel__reset_sample_bit(pos, ADDR);
1037 perf_evsel__reset_sample_bit(pos, READ);
1038 attr->mmap = 0;
1039 attr->comm = 0;
1040 attr->task = 0;
1041
1042 attr->sample_period = 1;
1043
1044 attr->watermark = 0;
1045 attr->wakeup_events = 1000;
1046
1047 /* will enable all once we are ready */
1048 attr->disabled = 1;
1049 }
1050
1051 err = perf_evlist__open(evlist);
1052 if (err < 0) {
1053 printf("Couldn't create the events: %s\n",
1054 str_error_r(errno, sbuf, sizeof(sbuf)));
1055 goto out;
1056 }
1057
1058 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages) < 0) {
1059 ui__error("Failed to mmap the events: %s\n",
1060 str_error_r(errno, sbuf, sizeof(sbuf)));
1061 perf_evlist__close(evlist);
1062 goto out;
1063 }
1064
1065 rc = 0;
1066
1067 out:
1068 return rc;
1069 }
1070 #endif
1071
1072 static int read_events(struct perf_kvm_stat *kvm)
1073 {
1074 int ret;
1075
1076 struct perf_tool eops = {
1077 .sample = process_sample_event,
1078 .comm = perf_event__process_comm,
1079 .namespaces = perf_event__process_namespaces,
1080 .ordered_events = true,
1081 };
1082 struct perf_data file = {
1083 .path = kvm->file_name,
1084 .mode = PERF_DATA_MODE_READ,
1085 .force = kvm->force,
1086 };
1087
1088 kvm->tool = eops;
1089 kvm->session = perf_session__new(&file, false, &kvm->tool);
1090 if (!kvm->session) {
1091 pr_err("Initializing perf session failed\n");
1092 return -1;
1093 }
1094
1095 symbol__init(&kvm->session->header.env);
1096
1097 if (!perf_session__has_traces(kvm->session, "kvm record")) {
1098 ret = -EINVAL;
1099 goto out_delete;
1100 }
1101
1102 /*
1103 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1104 * traced in the old kernel.
1105 */
1106 ret = cpu_isa_config(kvm);
1107 if (ret < 0)
1108 goto out_delete;
1109
1110 ret = perf_session__process_events(kvm->session);
1111
1112 out_delete:
1113 perf_session__delete(kvm->session);
1114 return ret;
1115 }
1116
1117 static int parse_target_str(struct perf_kvm_stat *kvm)
1118 {
1119 if (kvm->opts.target.pid) {
1120 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1121 if (kvm->pid_list == NULL) {
1122 pr_err("Error parsing process id string\n");
1123 return -EINVAL;
1124 }
1125 }
1126
1127 return 0;
1128 }
1129
1130 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1131 {
1132 int ret = -EINVAL;
1133 int vcpu = kvm->trace_vcpu;
1134
1135 if (parse_target_str(kvm) != 0)
1136 goto exit;
1137
1138 if (!verify_vcpu(vcpu))
1139 goto exit;
1140
1141 if (!select_key(kvm))
1142 goto exit;
1143
1144 if (!register_kvm_events_ops(kvm))
1145 goto exit;
1146
1147 init_kvm_event_record(kvm);
1148 setup_pager();
1149
1150 ret = read_events(kvm);
1151 if (ret)
1152 goto exit;
1153
1154 sort_result(kvm);
1155 print_result(kvm);
1156
1157 exit:
1158 return ret;
1159 }
1160
1161 #define STRDUP_FAIL_EXIT(s) \
1162 ({ char *_p; \
1163 _p = strdup(s); \
1164 if (!_p) \
1165 return -ENOMEM; \
1166 _p; \
1167 })
1168
1169 int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1170 {
1171 return 0;
1172 }
1173
1174 static int
1175 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1176 {
1177 unsigned int rec_argc, i, j, events_tp_size;
1178 const char **rec_argv;
1179 const char * const record_args[] = {
1180 "record",
1181 "-R",
1182 "-m", "1024",
1183 "-c", "1",
1184 };
1185 const char * const kvm_stat_record_usage[] = {
1186 "perf kvm stat record [<options>]",
1187 NULL
1188 };
1189 const char * const *events_tp;
1190 int ret;
1191
1192 events_tp_size = 0;
1193 ret = setup_kvm_events_tp(kvm);
1194 if (ret < 0) {
1195 pr_err("Unable to setup the kvm tracepoints\n");
1196 return ret;
1197 }
1198
1199 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1200 events_tp_size++;
1201
1202 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1203 2 * events_tp_size;
1204 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1205
1206 if (rec_argv == NULL)
1207 return -ENOMEM;
1208
1209 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1210 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1211
1212 for (j = 0; j < events_tp_size; j++) {
1213 rec_argv[i++] = "-e";
1214 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1215 }
1216
1217 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1218 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1219
1220 for (j = 1; j < (unsigned int)argc; j++, i++)
1221 rec_argv[i] = argv[j];
1222
1223 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1224 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1225 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1226
1227 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1228 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1229 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1230 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1231 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1232 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1233 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1234 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1235 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1236 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1237 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1238 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1239 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1240 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1241 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1242
1243 record_usage = kvm_stat_record_usage;
1244 return cmd_record(i, rec_argv);
1245 }
1246
1247 static int
1248 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1249 {
1250 const struct option kvm_events_report_options[] = {
1251 OPT_STRING(0, "event", &kvm->report_event, "report event",
1252 "event for reporting: vmexit, "
1253 "mmio (x86 only), ioport (x86 only)"),
1254 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1255 "vcpu id to report"),
1256 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1257 "key for sorting: sample(sort by samples number)"
1258 " time (sort by avg time)"),
1259 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1260 "analyze events only for given process id(s)"),
1261 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
1262 OPT_END()
1263 };
1264
1265 const char * const kvm_events_report_usage[] = {
1266 "perf kvm stat report [<options>]",
1267 NULL
1268 };
1269
1270 if (argc) {
1271 argc = parse_options(argc, argv,
1272 kvm_events_report_options,
1273 kvm_events_report_usage, 0);
1274 if (argc)
1275 usage_with_options(kvm_events_report_usage,
1276 kvm_events_report_options);
1277 }
1278
1279 if (!kvm->opts.target.pid)
1280 kvm->opts.target.system_wide = true;
1281
1282 return kvm_events_report_vcpu(kvm);
1283 }
1284
1285 #ifdef HAVE_TIMERFD_SUPPORT
1286 static struct perf_evlist *kvm_live_event_list(void)
1287 {
1288 struct perf_evlist *evlist;
1289 char *tp, *name, *sys;
1290 int err = -1;
1291 const char * const *events_tp;
1292
1293 evlist = perf_evlist__new();
1294 if (evlist == NULL)
1295 return NULL;
1296
1297 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1298
1299 tp = strdup(*events_tp);
1300 if (tp == NULL)
1301 goto out;
1302
1303 /* split tracepoint into subsystem and name */
1304 sys = tp;
1305 name = strchr(tp, ':');
1306 if (name == NULL) {
1307 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1308 *events_tp);
1309 free(tp);
1310 goto out;
1311 }
1312 *name = '\0';
1313 name++;
1314
1315 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1316 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1317 free(tp);
1318 goto out;
1319 }
1320
1321 free(tp);
1322 }
1323
1324 err = 0;
1325
1326 out:
1327 if (err) {
1328 perf_evlist__delete(evlist);
1329 evlist = NULL;
1330 }
1331
1332 return evlist;
1333 }
1334
1335 static int kvm_events_live(struct perf_kvm_stat *kvm,
1336 int argc, const char **argv)
1337 {
1338 char errbuf[BUFSIZ];
1339 int err;
1340
1341 const struct option live_options[] = {
1342 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1343 "record events on existing process id"),
1344 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1345 "number of mmap data pages",
1346 perf_evlist__parse_mmap_pages),
1347 OPT_INCR('v', "verbose", &verbose,
1348 "be more verbose (show counter open errors, etc)"),
1349 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1350 "system-wide collection from all CPUs"),
1351 OPT_UINTEGER('d', "display", &kvm->display_time,
1352 "time in seconds between display updates"),
1353 OPT_STRING(0, "event", &kvm->report_event, "report event",
1354 "event for reporting: "
1355 "vmexit, mmio (x86 only), ioport (x86 only)"),
1356 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1357 "vcpu id to report"),
1358 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1359 "key for sorting: sample(sort by samples number)"
1360 " time (sort by avg time)"),
1361 OPT_U64(0, "duration", &kvm->duration,
1362 "show events other than"
1363 " HLT (x86 only) or Wait state (s390 only)"
1364 " that take longer than duration usecs"),
1365 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
1366 "per thread proc mmap processing timeout in ms"),
1367 OPT_END()
1368 };
1369 const char * const live_usage[] = {
1370 "perf kvm stat live [<options>]",
1371 NULL
1372 };
1373 struct perf_data data = {
1374 .mode = PERF_DATA_MODE_WRITE,
1375 };
1376
1377
1378 /* event handling */
1379 kvm->tool.sample = process_sample_event;
1380 kvm->tool.comm = perf_event__process_comm;
1381 kvm->tool.exit = perf_event__process_exit;
1382 kvm->tool.fork = perf_event__process_fork;
1383 kvm->tool.lost = process_lost_event;
1384 kvm->tool.namespaces = perf_event__process_namespaces;
1385 kvm->tool.ordered_events = true;
1386 perf_tool__fill_defaults(&kvm->tool);
1387
1388 /* set defaults */
1389 kvm->display_time = 1;
1390 kvm->opts.user_interval = 1;
1391 kvm->opts.mmap_pages = 512;
1392 kvm->opts.target.uses_mmap = false;
1393 kvm->opts.target.uid_str = NULL;
1394 kvm->opts.target.uid = UINT_MAX;
1395
1396 symbol__init(NULL);
1397 disable_buildid_cache();
1398
1399 use_browser = 0;
1400
1401 if (argc) {
1402 argc = parse_options(argc, argv, live_options,
1403 live_usage, 0);
1404 if (argc)
1405 usage_with_options(live_usage, live_options);
1406 }
1407
1408 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1409
1410 /*
1411 * target related setups
1412 */
1413 err = target__validate(&kvm->opts.target);
1414 if (err) {
1415 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1416 ui__warning("%s", errbuf);
1417 }
1418
1419 if (target__none(&kvm->opts.target))
1420 kvm->opts.target.system_wide = true;
1421
1422
1423 /*
1424 * generate the event list
1425 */
1426 err = setup_kvm_events_tp(kvm);
1427 if (err < 0) {
1428 pr_err("Unable to setup the kvm tracepoints\n");
1429 return err;
1430 }
1431
1432 kvm->evlist = kvm_live_event_list();
1433 if (kvm->evlist == NULL) {
1434 err = -1;
1435 goto out;
1436 }
1437
1438 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1439 usage_with_options(live_usage, live_options);
1440
1441 /*
1442 * perf session
1443 */
1444 kvm->session = perf_session__new(&data, false, &kvm->tool);
1445 if (kvm->session == NULL) {
1446 err = -1;
1447 goto out;
1448 }
1449 kvm->session->evlist = kvm->evlist;
1450 perf_session__set_id_hdr_size(kvm->session);
1451 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1452 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1453 kvm->evlist->threads, false, 1);
1454 err = kvm_live_open_events(kvm);
1455 if (err)
1456 goto out;
1457
1458 err = kvm_events_live_report(kvm);
1459
1460 out:
1461 perf_session__delete(kvm->session);
1462 kvm->session = NULL;
1463 perf_evlist__delete(kvm->evlist);
1464
1465 return err;
1466 }
1467 #endif
1468
1469 static void print_kvm_stat_usage(void)
1470 {
1471 printf("Usage: perf kvm stat <command>\n\n");
1472
1473 printf("# Available commands:\n");
1474 printf("\trecord: record kvm events\n");
1475 printf("\treport: report statistical data of kvm events\n");
1476 printf("\tlive: live reporting of statistical data of kvm events\n");
1477
1478 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1479 }
1480
1481 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1482 {
1483 struct perf_kvm_stat kvm = {
1484 .file_name = file_name,
1485
1486 .trace_vcpu = -1,
1487 .report_event = "vmexit",
1488 .sort_key = "sample",
1489
1490 };
1491
1492 if (argc == 1) {
1493 print_kvm_stat_usage();
1494 goto perf_stat;
1495 }
1496
1497 if (!strncmp(argv[1], "rec", 3))
1498 return kvm_events_record(&kvm, argc - 1, argv + 1);
1499
1500 if (!strncmp(argv[1], "rep", 3))
1501 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1502
1503 #ifdef HAVE_TIMERFD_SUPPORT
1504 if (!strncmp(argv[1], "live", 4))
1505 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1506 #endif
1507
1508 perf_stat:
1509 return cmd_stat(argc, argv);
1510 }
1511 #endif /* HAVE_KVM_STAT_SUPPORT */
1512
1513 static int __cmd_record(const char *file_name, int argc, const char **argv)
1514 {
1515 int rec_argc, i = 0, j;
1516 const char **rec_argv;
1517
1518 rec_argc = argc + 2;
1519 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1520 rec_argv[i++] = strdup("record");
1521 rec_argv[i++] = strdup("-o");
1522 rec_argv[i++] = strdup(file_name);
1523 for (j = 1; j < argc; j++, i++)
1524 rec_argv[i] = argv[j];
1525
1526 BUG_ON(i != rec_argc);
1527
1528 return cmd_record(i, rec_argv);
1529 }
1530
1531 static int __cmd_report(const char *file_name, int argc, const char **argv)
1532 {
1533 int rec_argc, i = 0, j;
1534 const char **rec_argv;
1535
1536 rec_argc = argc + 2;
1537 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1538 rec_argv[i++] = strdup("report");
1539 rec_argv[i++] = strdup("-i");
1540 rec_argv[i++] = strdup(file_name);
1541 for (j = 1; j < argc; j++, i++)
1542 rec_argv[i] = argv[j];
1543
1544 BUG_ON(i != rec_argc);
1545
1546 return cmd_report(i, rec_argv);
1547 }
1548
1549 static int
1550 __cmd_buildid_list(const char *file_name, int argc, const char **argv)
1551 {
1552 int rec_argc, i = 0, j;
1553 const char **rec_argv;
1554
1555 rec_argc = argc + 2;
1556 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1557 rec_argv[i++] = strdup("buildid-list");
1558 rec_argv[i++] = strdup("-i");
1559 rec_argv[i++] = strdup(file_name);
1560 for (j = 1; j < argc; j++, i++)
1561 rec_argv[i] = argv[j];
1562
1563 BUG_ON(i != rec_argc);
1564
1565 return cmd_buildid_list(i, rec_argv);
1566 }
1567
1568 int cmd_kvm(int argc, const char **argv)
1569 {
1570 const char *file_name = NULL;
1571 const struct option kvm_options[] = {
1572 OPT_STRING('i', "input", &file_name, "file",
1573 "Input file name"),
1574 OPT_STRING('o', "output", &file_name, "file",
1575 "Output file name"),
1576 OPT_BOOLEAN(0, "guest", &perf_guest,
1577 "Collect guest os data"),
1578 OPT_BOOLEAN(0, "host", &perf_host,
1579 "Collect host os data"),
1580 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1581 "guest mount directory under which every guest os"
1582 " instance has a subdir"),
1583 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1584 "file", "file saving guest os vmlinux"),
1585 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1586 "file", "file saving guest os /proc/kallsyms"),
1587 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1588 "file", "file saving guest os /proc/modules"),
1589 OPT_INCR('v', "verbose", &verbose,
1590 "be more verbose (show counter open errors, etc)"),
1591 OPT_END()
1592 };
1593
1594 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1595 "buildid-list", "stat", NULL };
1596 const char *kvm_usage[] = { NULL, NULL };
1597
1598 perf_host = 0;
1599 perf_guest = 1;
1600
1601 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1602 PARSE_OPT_STOP_AT_NON_OPTION);
1603 if (!argc)
1604 usage_with_options(kvm_usage, kvm_options);
1605
1606 if (!perf_host)
1607 perf_guest = 1;
1608
1609 if (!file_name) {
1610 file_name = get_filename_for_perf_kvm();
1611
1612 if (!file_name) {
1613 pr_err("Failed to allocate memory for filename\n");
1614 return -ENOMEM;
1615 }
1616 }
1617
1618 if (!strncmp(argv[0], "rec", 3))
1619 return __cmd_record(file_name, argc, argv);
1620 else if (!strncmp(argv[0], "rep", 3))
1621 return __cmd_report(file_name, argc, argv);
1622 else if (!strncmp(argv[0], "diff", 4))
1623 return cmd_diff(argc, argv);
1624 else if (!strncmp(argv[0], "top", 3))
1625 return cmd_top(argc, argv);
1626 else if (!strncmp(argv[0], "buildid-list", 12))
1627 return __cmd_buildid_list(file_name, argc, argv);
1628 #ifdef HAVE_KVM_STAT_SUPPORT
1629 else if (!strncmp(argv[0], "stat", 4))
1630 return kvm_cmd_stat(file_name, argc, argv);
1631 #endif
1632 else
1633 usage_with_options(kvm_usage, kvm_options);
1634
1635 return 0;
1636 }
Linux with added FPC-III support