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1// SPDX-License-Identifier: GPL-2.0
2#include "builtin.h"
3#include "perf.h"
4
5#include "util/build-id.h"
6#include "util/evsel.h"
7#include "util/evlist.h"
8#include "util/mmap.h"
9#include "util/term.h"
10#include "util/symbol.h"
11#include "util/thread.h"
12#include "util/header.h"
13#include "util/session.h"
14#include "util/intlist.h"
15#include <subcmd/pager.h>
16#include <subcmd/parse-options.h>
17#include "util/trace-event.h"
18#include "util/debug.h"
19#include "util/tool.h"
20#include "util/stat.h"
21#include "util/synthetic-events.h"
22#include "util/top.h"
23#include "util/data.h"
24#include "util/ordered-events.h"
25#include "util/kvm-stat.h"
26#include "ui/ui.h"
27#include "util/string2.h"
28
29#include <sys/prctl.h>
30#ifdef HAVE_TIMERFD_SUPPORT
31#include <sys/timerfd.h>
32#endif
33#include <sys/time.h>
34#include <sys/types.h>
35#include <sys/stat.h>
36#include <fcntl.h>
37
38#include <linux/err.h>
39#include <linux/kernel.h>
40#include <linux/string.h>
41#include <linux/time64.h>
42#include <linux/zalloc.h>
43#include <errno.h>
44#include <inttypes.h>
45#include <poll.h>
46#include <termios.h>
47#include <semaphore.h>
48#include <signal.h>
49#include <math.h>
50#include <perf/mmap.h>
51
52static const char *get_filename_for_perf_kvm(void)
53{
54 const char *filename;
55
56 if (perf_host && !perf_guest)
57 filename = strdup("perf.data.host");
58 else if (!perf_host && perf_guest)
59 filename = strdup("perf.data.guest");
60 else
61 filename = strdup("perf.data.kvm");
62
63 return filename;
64}
65
66#if defined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
67
68void exit_event_get_key(struct evsel *evsel,
69 struct perf_sample *sample,
70 struct event_key *key)
71{
72 key->info = 0;
73 key->key = evsel__intval(evsel, sample, kvm_exit_reason);
74}
75
76bool kvm_exit_event(struct evsel *evsel)
77{
78 return !strcmp(evsel->name, kvm_exit_trace);
79}
80
81bool exit_event_begin(struct evsel *evsel,
82 struct perf_sample *sample, struct event_key *key)
83{
84 if (kvm_exit_event(evsel)) {
85 exit_event_get_key(evsel, sample, key);
86 return true;
87 }
88
89 return false;
90}
91
92bool kvm_entry_event(struct evsel *evsel)
93{
94 return !strcmp(evsel->name, kvm_entry_trace);
95}
96
97bool exit_event_end(struct evsel *evsel,
98 struct perf_sample *sample __maybe_unused,
99 struct event_key *key __maybe_unused)
100{
101 return kvm_entry_event(evsel);
102}
103
104static const char *get_exit_reason(struct perf_kvm_stat *kvm,
105 struct exit_reasons_table *tbl,
106 u64 exit_code)
107{
108 while (tbl->reason != NULL) {
109 if (tbl->exit_code == exit_code)
110 return tbl->reason;
111 tbl++;
112 }
113
114 pr_err("unknown kvm exit code:%lld on %s\n",
115 (unsigned long long)exit_code, kvm->exit_reasons_isa);
116 return "UNKNOWN";
117}
118
119void exit_event_decode_key(struct perf_kvm_stat *kvm,
120 struct event_key *key,
121 char *decode)
122{
123 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
124 key->key);
125
126 scnprintf(decode, decode_str_len, "%s", exit_reason);
127}
128
129static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
130{
131 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
132
133 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) {
134 if (!strcmp(events_ops->name, kvm->report_event)) {
135 kvm->events_ops = events_ops->ops;
136 return true;
137 }
138 }
139
140 return false;
141}
142
143struct vcpu_event_record {
144 int vcpu_id;
145 u64 start_time;
146 struct kvm_event *last_event;
147};
148
149
150static void init_kvm_event_record(struct perf_kvm_stat *kvm)
151{
152 unsigned int i;
153
154 for (i = 0; i < EVENTS_CACHE_SIZE; i++)
155 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
156}
157
158#ifdef HAVE_TIMERFD_SUPPORT
159static void clear_events_cache_stats(struct list_head *kvm_events_cache)
160{
161 struct list_head *head;
162 struct kvm_event *event;
163 unsigned int i;
164 int j;
165
166 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
167 head = &kvm_events_cache[i];
168 list_for_each_entry(event, head, hash_entry) {
169 /* reset stats for event */
170 event->total.time = 0;
171 init_stats(&event->total.stats);
172
173 for (j = 0; j < event->max_vcpu; ++j) {
174 event->vcpu[j].time = 0;
175 init_stats(&event->vcpu[j].stats);
176 }
177 }
178 }
179}
180#endif
181
182static int kvm_events_hash_fn(u64 key)
183{
184 return key & (EVENTS_CACHE_SIZE - 1);
185}
186
187static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
188{
189 int old_max_vcpu = event->max_vcpu;
190 void *prev;
191
192 if (vcpu_id < event->max_vcpu)
193 return true;
194
195 while (event->max_vcpu <= vcpu_id)
196 event->max_vcpu += DEFAULT_VCPU_NUM;
197
198 prev = event->vcpu;
199 event->vcpu = realloc(event->vcpu,
200 event->max_vcpu * sizeof(*event->vcpu));
201 if (!event->vcpu) {
202 free(prev);
203 pr_err("Not enough memory\n");
204 return false;
205 }
206
207 memset(event->vcpu + old_max_vcpu, 0,
208 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
209 return true;
210}
211
212static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
213{
214 struct kvm_event *event;
215
216 event = zalloc(sizeof(*event));
217 if (!event) {
218 pr_err("Not enough memory\n");
219 return NULL;
220 }
221
222 event->key = *key;
223 init_stats(&event->total.stats);
224 return event;
225}
226
227static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
228 struct event_key *key)
229{
230 struct kvm_event *event;
231 struct list_head *head;
232
233 BUG_ON(key->key == INVALID_KEY);
234
235 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
236 list_for_each_entry(event, head, hash_entry) {
237 if (event->key.key == key->key && event->key.info == key->info)
238 return event;
239 }
240
241 event = kvm_alloc_init_event(key);
242 if (!event)
243 return NULL;
244
245 list_add(&event->hash_entry, head);
246 return event;
247}
248
249static bool handle_begin_event(struct perf_kvm_stat *kvm,
250 struct vcpu_event_record *vcpu_record,
251 struct event_key *key, u64 timestamp)
252{
253 struct kvm_event *event = NULL;
254
255 if (key->key != INVALID_KEY)
256 event = find_create_kvm_event(kvm, key);
257
258 vcpu_record->last_event = event;
259 vcpu_record->start_time = timestamp;
260 return true;
261}
262
263static void
264kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
265{
266 kvm_stats->time += time_diff;
267 update_stats(&kvm_stats->stats, time_diff);
268}
269
270static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
271{
272 struct kvm_event_stats *kvm_stats = &event->total;
273
274 if (vcpu_id != -1)
275 kvm_stats = &event->vcpu[vcpu_id];
276
277 return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
278 avg_stats(&kvm_stats->stats));
279}
280
281static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
282 u64 time_diff)
283{
284 if (vcpu_id == -1) {
285 kvm_update_event_stats(&event->total, time_diff);
286 return true;
287 }
288
289 if (!kvm_event_expand(event, vcpu_id))
290 return false;
291
292 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
293 return true;
294}
295
296static bool is_child_event(struct perf_kvm_stat *kvm,
297 struct evsel *evsel,
298 struct perf_sample *sample,
299 struct event_key *key)
300{
301 struct child_event_ops *child_ops;
302
303 child_ops = kvm->events_ops->child_ops;
304
305 if (!child_ops)
306 return false;
307
308 for (; child_ops->name; child_ops++) {
309 if (!strcmp(evsel->name, child_ops->name)) {
310 child_ops->get_key(evsel, sample, key);
311 return true;
312 }
313 }
314
315 return false;
316}
317
318static bool handle_child_event(struct perf_kvm_stat *kvm,
319 struct vcpu_event_record *vcpu_record,
320 struct event_key *key,
321 struct perf_sample *sample __maybe_unused)
322{
323 struct kvm_event *event = NULL;
324
325 if (key->key != INVALID_KEY)
326 event = find_create_kvm_event(kvm, key);
327
328 vcpu_record->last_event = event;
329
330 return true;
331}
332
333static bool skip_event(const char *event)
334{
335 const char * const *skip_events;
336
337 for (skip_events = kvm_skip_events; *skip_events; skip_events++)
338 if (!strcmp(event, *skip_events))
339 return true;
340
341 return false;
342}
343
344static bool handle_end_event(struct perf_kvm_stat *kvm,
345 struct vcpu_event_record *vcpu_record,
346 struct event_key *key,
347 struct perf_sample *sample)
348{
349 struct kvm_event *event;
350 u64 time_begin, time_diff;
351 int vcpu;
352
353 if (kvm->trace_vcpu == -1)
354 vcpu = -1;
355 else
356 vcpu = vcpu_record->vcpu_id;
357
358 event = vcpu_record->last_event;
359 time_begin = vcpu_record->start_time;
360
361 /* The begin event is not caught. */
362 if (!time_begin)
363 return true;
364
365 /*
366 * In some case, the 'begin event' only records the start timestamp,
367 * the actual event is recognized in the 'end event' (e.g. mmio-event).
368 */
369
370 /* Both begin and end events did not get the key. */
371 if (!event && key->key == INVALID_KEY)
372 return true;
373
374 if (!event)
375 event = find_create_kvm_event(kvm, key);
376
377 if (!event)
378 return false;
379
380 vcpu_record->last_event = NULL;
381 vcpu_record->start_time = 0;
382
383 /* seems to happen once in a while during live mode */
384 if (sample->time < time_begin) {
385 pr_debug("End time before begin time; skipping event.\n");
386 return true;
387 }
388
389 time_diff = sample->time - time_begin;
390
391 if (kvm->duration && time_diff > kvm->duration) {
392 char decode[decode_str_len];
393
394 kvm->events_ops->decode_key(kvm, &event->key, decode);
395 if (!skip_event(decode)) {
396 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
397 sample->time, sample->pid, vcpu_record->vcpu_id,
398 decode, time_diff / NSEC_PER_USEC);
399 }
400 }
401
402 return update_kvm_event(event, vcpu, time_diff);
403}
404
405static
406struct vcpu_event_record *per_vcpu_record(struct thread *thread,
407 struct evsel *evsel,
408 struct perf_sample *sample)
409{
410 /* Only kvm_entry records vcpu id. */
411 if (!thread__priv(thread) && kvm_entry_event(evsel)) {
412 struct vcpu_event_record *vcpu_record;
413
414 vcpu_record = zalloc(sizeof(*vcpu_record));
415 if (!vcpu_record) {
416 pr_err("%s: Not enough memory\n", __func__);
417 return NULL;
418 }
419
420 vcpu_record->vcpu_id = evsel__intval(evsel, sample, vcpu_id_str);
421 thread__set_priv(thread, vcpu_record);
422 }
423
424 return thread__priv(thread);
425}
426
427static bool handle_kvm_event(struct perf_kvm_stat *kvm,
428 struct thread *thread,
429 struct evsel *evsel,
430 struct perf_sample *sample)
431{
432 struct vcpu_event_record *vcpu_record;
433 struct event_key key = { .key = INVALID_KEY,
434 .exit_reasons = kvm->exit_reasons };
435
436 vcpu_record = per_vcpu_record(thread, evsel, sample);
437 if (!vcpu_record)
438 return true;
439
440 /* only process events for vcpus user cares about */
441 if ((kvm->trace_vcpu != -1) &&
442 (kvm->trace_vcpu != vcpu_record->vcpu_id))
443 return true;
444
445 if (kvm->events_ops->is_begin_event(evsel, sample, &key))
446 return handle_begin_event(kvm, vcpu_record, &key, sample->time);
447
448 if (is_child_event(kvm, evsel, sample, &key))
449 return handle_child_event(kvm, vcpu_record, &key, sample);
450
451 if (kvm->events_ops->is_end_event(evsel, sample, &key))
452 return handle_end_event(kvm, vcpu_record, &key, sample);
453
454 return true;
455}
456
457#define GET_EVENT_KEY(func, field) \
458static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
459{ \
460 if (vcpu == -1) \
461 return event->total.field; \
462 \
463 if (vcpu >= event->max_vcpu) \
464 return 0; \
465 \
466 return event->vcpu[vcpu].field; \
467}
468
469#define COMPARE_EVENT_KEY(func, field) \
470GET_EVENT_KEY(func, field) \
471static int compare_kvm_event_ ## func(struct kvm_event *one, \
472 struct kvm_event *two, int vcpu)\
473{ \
474 return get_event_ ##func(one, vcpu) > \
475 get_event_ ##func(two, vcpu); \
476}
477
478GET_EVENT_KEY(time, time);
479COMPARE_EVENT_KEY(count, stats.n);
480COMPARE_EVENT_KEY(mean, stats.mean);
481GET_EVENT_KEY(max, stats.max);
482GET_EVENT_KEY(min, stats.min);
483
484#define DEF_SORT_NAME_KEY(name, compare_key) \
485 { #name, compare_kvm_event_ ## compare_key }
486
487static struct kvm_event_key keys[] = {
488 DEF_SORT_NAME_KEY(sample, count),
489 DEF_SORT_NAME_KEY(time, mean),
490 { NULL, NULL }
491};
492
493static bool select_key(struct perf_kvm_stat *kvm)
494{
495 int i;
496
497 for (i = 0; keys[i].name; i++) {
498 if (!strcmp(keys[i].name, kvm->sort_key)) {
499 kvm->compare = keys[i].key;
500 return true;
501 }
502 }
503
504 pr_err("Unknown compare key:%s\n", kvm->sort_key);
505 return false;
506}
507
508static void insert_to_result(struct rb_root *result, struct kvm_event *event,
509 key_cmp_fun bigger, int vcpu)
510{
511 struct rb_node **rb = &result->rb_node;
512 struct rb_node *parent = NULL;
513 struct kvm_event *p;
514
515 while (*rb) {
516 p = container_of(*rb, struct kvm_event, rb);
517 parent = *rb;
518
519 if (bigger(event, p, vcpu))
520 rb = &(*rb)->rb_left;
521 else
522 rb = &(*rb)->rb_right;
523 }
524
525 rb_link_node(&event->rb, parent, rb);
526 rb_insert_color(&event->rb, result);
527}
528
529static void
530update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
531{
532 int vcpu = kvm->trace_vcpu;
533
534 kvm->total_count += get_event_count(event, vcpu);
535 kvm->total_time += get_event_time(event, vcpu);
536}
537
538static bool event_is_valid(struct kvm_event *event, int vcpu)
539{
540 return !!get_event_count(event, vcpu);
541}
542
543static void sort_result(struct perf_kvm_stat *kvm)
544{
545 unsigned int i;
546 int vcpu = kvm->trace_vcpu;
547 struct kvm_event *event;
548
549 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
550 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
551 if (event_is_valid(event, vcpu)) {
552 update_total_count(kvm, event);
553 insert_to_result(&kvm->result, event,
554 kvm->compare, vcpu);
555 }
556 }
557 }
558}
559
560/* returns left most element of result, and erase it */
561static struct kvm_event *pop_from_result(struct rb_root *result)
562{
563 struct rb_node *node = rb_first(result);
564
565 if (!node)
566 return NULL;
567
568 rb_erase(node, result);
569 return container_of(node, struct kvm_event, rb);
570}
571
572static void print_vcpu_info(struct perf_kvm_stat *kvm)
573{
574 int vcpu = kvm->trace_vcpu;
575
576 pr_info("Analyze events for ");
577
578 if (kvm->opts.target.system_wide)
579 pr_info("all VMs, ");
580 else if (kvm->opts.target.pid)
581 pr_info("pid(s) %s, ", kvm->opts.target.pid);
582 else
583 pr_info("dazed and confused on what is monitored, ");
584
585 if (vcpu == -1)
586 pr_info("all VCPUs:\n\n");
587 else
588 pr_info("VCPU %d:\n\n", vcpu);
589}
590
591static void show_timeofday(void)
592{
593 char date[64];
594 struct timeval tv;
595 struct tm ltime;
596
597 gettimeofday(&tv, NULL);
598 if (localtime_r(&tv.tv_sec, <ime)) {
599 strftime(date, sizeof(date), "%H:%M:%S", <ime);
600 pr_info("%s.%06ld", date, tv.tv_usec);
601 } else
602 pr_info("00:00:00.000000");
603
604 return;
605}
606
607static void print_result(struct perf_kvm_stat *kvm)
608{
609 char decode[decode_str_len];
610 struct kvm_event *event;
611 int vcpu = kvm->trace_vcpu;
612
613 if (kvm->live) {
614 puts(CONSOLE_CLEAR);
615 show_timeofday();
616 }
617
618 pr_info("\n\n");
619 print_vcpu_info(kvm);
620 pr_info("%*s ", decode_str_len, kvm->events_ops->name);
621 pr_info("%10s ", "Samples");
622 pr_info("%9s ", "Samples%");
623
624 pr_info("%9s ", "Time%");
625 pr_info("%11s ", "Min Time");
626 pr_info("%11s ", "Max Time");
627 pr_info("%16s ", "Avg time");
628 pr_info("\n\n");
629
630 while ((event = pop_from_result(&kvm->result))) {
631 u64 ecount, etime, max, min;
632
633 ecount = get_event_count(event, vcpu);
634 etime = get_event_time(event, vcpu);
635 max = get_event_max(event, vcpu);
636 min = get_event_min(event, vcpu);
637
638 kvm->events_ops->decode_key(kvm, &event->key, decode);
639 pr_info("%*s ", decode_str_len, decode);
640 pr_info("%10llu ", (unsigned long long)ecount);
641 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
642 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
643 pr_info("%9.2fus ", (double)min / NSEC_PER_USEC);
644 pr_info("%9.2fus ", (double)max / NSEC_PER_USEC);
645 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount / NSEC_PER_USEC,
646 kvm_event_rel_stddev(vcpu, event));
647 pr_info("\n");
648 }
649
650 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
651 kvm->total_count, kvm->total_time / (double)NSEC_PER_USEC);
652
653 if (kvm->lost_events)
654 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
655}
656
657#if defined(HAVE_TIMERFD_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
658static int process_lost_event(struct perf_tool *tool,
659 union perf_event *event __maybe_unused,
660 struct perf_sample *sample __maybe_unused,
661 struct machine *machine __maybe_unused)
662{
663 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
664
665 kvm->lost_events++;
666 return 0;
667}
668#endif
669
670static bool skip_sample(struct perf_kvm_stat *kvm,
671 struct perf_sample *sample)
672{
673 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
674 return true;
675
676 return false;
677}
678
679static int process_sample_event(struct perf_tool *tool,
680 union perf_event *event,
681 struct perf_sample *sample,
682 struct evsel *evsel,
683 struct machine *machine)
684{
685 int err = 0;
686 struct thread *thread;
687 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
688 tool);
689
690 if (skip_sample(kvm, sample))
691 return 0;
692
693 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
694 if (thread == NULL) {
695 pr_debug("problem processing %d event, skipping it.\n",
696 event->header.type);
697 return -1;
698 }
699
700 if (!handle_kvm_event(kvm, thread, evsel, sample))
701 err = -1;
702
703 thread__put(thread);
704 return err;
705}
706
707static int cpu_isa_config(struct perf_kvm_stat *kvm)
708{
709 char buf[128], *cpuid;
710 int err;
711
712 if (kvm->live) {
713 err = get_cpuid(buf, sizeof(buf));
714 if (err != 0) {
715 pr_err("Failed to look up CPU type: %s\n",
716 str_error_r(err, buf, sizeof(buf)));
717 return -err;
718 }
719 cpuid = buf;
720 } else
721 cpuid = kvm->session->header.env.cpuid;
722
723 if (!cpuid) {
724 pr_err("Failed to look up CPU type\n");
725 return -EINVAL;
726 }
727
728 err = cpu_isa_init(kvm, cpuid);
729 if (err == -ENOTSUP)
730 pr_err("CPU %s is not supported.\n", cpuid);
731
732 return err;
733}
734
735static bool verify_vcpu(int vcpu)
736{
737 if (vcpu != -1 && vcpu < 0) {
738 pr_err("Invalid vcpu:%d.\n", vcpu);
739 return false;
740 }
741
742 return true;
743}
744
745#if defined(HAVE_TIMERFD_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
746/* keeping the max events to a modest level to keep
747 * the processing of samples per mmap smooth.
748 */
749#define PERF_KVM__MAX_EVENTS_PER_MMAP 25
750
751static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
752 u64 *mmap_time)
753{
754 struct evlist *evlist = kvm->evlist;
755 union perf_event *event;
756 struct mmap *md;
757 u64 timestamp;
758 s64 n = 0;
759 int err;
760
761 *mmap_time = ULLONG_MAX;
762 md = &evlist->mmap[idx];
763 err = perf_mmap__read_init(&md->core);
764 if (err < 0)
765 return (err == -EAGAIN) ? 0 : -1;
766
767 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
768 err = evlist__parse_sample_timestamp(evlist, event, ×tamp);
769 if (err) {
770 perf_mmap__consume(&md->core);
771 pr_err("Failed to parse sample\n");
772 return -1;
773 }
774
775 err = perf_session__queue_event(kvm->session, event, timestamp, 0, NULL);
776 /*
777 * FIXME: Here we can't consume the event, as perf_session__queue_event will
778 * point to it, and it'll get possibly overwritten by the kernel.
779 */
780 perf_mmap__consume(&md->core);
781
782 if (err) {
783 pr_err("Failed to enqueue sample: %d\n", err);
784 return -1;
785 }
786
787 /* save time stamp of our first sample for this mmap */
788 if (n == 0)
789 *mmap_time = timestamp;
790
791 /* limit events per mmap handled all at once */
792 n++;
793 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
794 break;
795 }
796
797 perf_mmap__read_done(&md->core);
798 return n;
799}
800
801static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
802{
803 int i, err, throttled = 0;
804 s64 n, ntotal = 0;
805 u64 flush_time = ULLONG_MAX, mmap_time;
806
807 for (i = 0; i < kvm->evlist->core.nr_mmaps; i++) {
808 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
809 if (n < 0)
810 return -1;
811
812 /* flush time is going to be the minimum of all the individual
813 * mmap times. Essentially, we flush all the samples queued up
814 * from the last pass under our minimal start time -- that leaves
815 * a very small race for samples to come in with a lower timestamp.
816 * The ioctl to return the perf_clock timestamp should close the
817 * race entirely.
818 */
819 if (mmap_time < flush_time)
820 flush_time = mmap_time;
821
822 ntotal += n;
823 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
824 throttled = 1;
825 }
826
827 /* flush queue after each round in which we processed events */
828 if (ntotal) {
829 struct ordered_events *oe = &kvm->session->ordered_events;
830
831 oe->next_flush = flush_time;
832 err = ordered_events__flush(oe, OE_FLUSH__ROUND);
833 if (err) {
834 if (kvm->lost_events)
835 pr_info("\nLost events: %" PRIu64 "\n\n",
836 kvm->lost_events);
837 return err;
838 }
839 }
840
841 return throttled;
842}
843
844static volatile int done;
845
846static void sig_handler(int sig __maybe_unused)
847{
848 done = 1;
849}
850
851static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
852{
853 struct itimerspec new_value;
854 int rc = -1;
855
856 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
857 if (kvm->timerfd < 0) {
858 pr_err("timerfd_create failed\n");
859 goto out;
860 }
861
862 new_value.it_value.tv_sec = kvm->display_time;
863 new_value.it_value.tv_nsec = 0;
864 new_value.it_interval.tv_sec = kvm->display_time;
865 new_value.it_interval.tv_nsec = 0;
866
867 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
868 pr_err("timerfd_settime failed: %d\n", errno);
869 close(kvm->timerfd);
870 goto out;
871 }
872
873 rc = 0;
874out:
875 return rc;
876}
877
878static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
879{
880 uint64_t c;
881 int rc;
882
883 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
884 if (rc < 0) {
885 if (errno == EAGAIN)
886 return 0;
887
888 pr_err("Failed to read timer fd: %d\n", errno);
889 return -1;
890 }
891
892 if (rc != sizeof(uint64_t)) {
893 pr_err("Error reading timer fd - invalid size returned\n");
894 return -1;
895 }
896
897 if (c != 1)
898 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
899
900 /* update display */
901 sort_result(kvm);
902 print_result(kvm);
903
904 /* reset counts */
905 clear_events_cache_stats(kvm->kvm_events_cache);
906 kvm->total_count = 0;
907 kvm->total_time = 0;
908 kvm->lost_events = 0;
909
910 return 0;
911}
912
913static int fd_set_nonblock(int fd)
914{
915 long arg = 0;
916
917 arg = fcntl(fd, F_GETFL);
918 if (arg < 0) {
919 pr_err("Failed to get current flags for fd %d\n", fd);
920 return -1;
921 }
922
923 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
924 pr_err("Failed to set non-block option on fd %d\n", fd);
925 return -1;
926 }
927
928 return 0;
929}
930
931static int perf_kvm__handle_stdin(void)
932{
933 int c;
934
935 c = getc(stdin);
936 if (c == 'q')
937 return 1;
938
939 return 0;
940}
941
942static int kvm_events_live_report(struct perf_kvm_stat *kvm)
943{
944 int nr_stdin, ret, err = -EINVAL;
945 struct termios save;
946
947 /* live flag must be set first */
948 kvm->live = true;
949
950 ret = cpu_isa_config(kvm);
951 if (ret < 0)
952 return ret;
953
954 if (!verify_vcpu(kvm->trace_vcpu) ||
955 !select_key(kvm) ||
956 !register_kvm_events_ops(kvm)) {
957 goto out;
958 }
959
960 set_term_quiet_input(&save);
961 init_kvm_event_record(kvm);
962
963 signal(SIGINT, sig_handler);
964 signal(SIGTERM, sig_handler);
965
966 /* add timer fd */
967 if (perf_kvm__timerfd_create(kvm) < 0) {
968 err = -1;
969 goto out;
970 }
971
972 if (evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
973 goto out;
974
975 nr_stdin = evlist__add_pollfd(kvm->evlist, fileno(stdin));
976 if (nr_stdin < 0)
977 goto out;
978
979 if (fd_set_nonblock(fileno(stdin)) != 0)
980 goto out;
981
982 /* everything is good - enable the events and process */
983 evlist__enable(kvm->evlist);
984
985 while (!done) {
986 struct fdarray *fda = &kvm->evlist->core.pollfd;
987 int rc;
988
989 rc = perf_kvm__mmap_read(kvm);
990 if (rc < 0)
991 break;
992
993 err = perf_kvm__handle_timerfd(kvm);
994 if (err)
995 goto out;
996
997 if (fda->entries[nr_stdin].revents & POLLIN)
998 done = perf_kvm__handle_stdin();
999
1000 if (!rc && !done)
1001 err = evlist__poll(kvm->evlist, 100);
1002 }
1003
1004 evlist__disable(kvm->evlist);
1005
1006 if (err == 0) {
1007 sort_result(kvm);
1008 print_result(kvm);
1009 }
1010
1011out:
1012 if (kvm->timerfd >= 0)
1013 close(kvm->timerfd);
1014
1015 tcsetattr(0, TCSAFLUSH, &save);
1016 return err;
1017}
1018
1019static int kvm_live_open_events(struct perf_kvm_stat *kvm)
1020{
1021 int err, rc = -1;
1022 struct evsel *pos;
1023 struct evlist *evlist = kvm->evlist;
1024 char sbuf[STRERR_BUFSIZE];
1025
1026 evlist__config(evlist, &kvm->opts, NULL);
1027
1028 /*
1029 * Note: exclude_{guest,host} do not apply here.
1030 * This command processes KVM tracepoints from host only
1031 */
1032 evlist__for_each_entry(evlist, pos) {
1033 struct perf_event_attr *attr = &pos->core.attr;
1034
1035 /* make sure these *are* set */
1036 evsel__set_sample_bit(pos, TID);
1037 evsel__set_sample_bit(pos, TIME);
1038 evsel__set_sample_bit(pos, CPU);
1039 evsel__set_sample_bit(pos, RAW);
1040 /* make sure these are *not*; want as small a sample as possible */
1041 evsel__reset_sample_bit(pos, PERIOD);
1042 evsel__reset_sample_bit(pos, IP);
1043 evsel__reset_sample_bit(pos, CALLCHAIN);
1044 evsel__reset_sample_bit(pos, ADDR);
1045 evsel__reset_sample_bit(pos, READ);
1046 attr->mmap = 0;
1047 attr->comm = 0;
1048 attr->task = 0;
1049
1050 attr->sample_period = 1;
1051
1052 attr->watermark = 0;
1053 attr->wakeup_events = 1000;
1054
1055 /* will enable all once we are ready */
1056 attr->disabled = 1;
1057 }
1058
1059 err = evlist__open(evlist);
1060 if (err < 0) {
1061 printf("Couldn't create the events: %s\n",
1062 str_error_r(errno, sbuf, sizeof(sbuf)));
1063 goto out;
1064 }
1065
1066 if (evlist__mmap(evlist, kvm->opts.mmap_pages) < 0) {
1067 ui__error("Failed to mmap the events: %s\n",
1068 str_error_r(errno, sbuf, sizeof(sbuf)));
1069 evlist__close(evlist);
1070 goto out;
1071 }
1072
1073 rc = 0;
1074
1075out:
1076 return rc;
1077}
1078#endif
1079
1080static int read_events(struct perf_kvm_stat *kvm)
1081{
1082 int ret;
1083
1084 struct perf_tool eops = {
1085 .sample = process_sample_event,
1086 .comm = perf_event__process_comm,
1087 .namespaces = perf_event__process_namespaces,
1088 .ordered_events = true,
1089 };
1090 struct perf_data file = {
1091 .path = kvm->file_name,
1092 .mode = PERF_DATA_MODE_READ,
1093 .force = kvm->force,
1094 };
1095
1096 kvm->tool = eops;
1097 kvm->session = perf_session__new(&file, &kvm->tool);
1098 if (IS_ERR(kvm->session)) {
1099 pr_err("Initializing perf session failed\n");
1100 return PTR_ERR(kvm->session);
1101 }
1102
1103 symbol__init(&kvm->session->header.env);
1104
1105 if (!perf_session__has_traces(kvm->session, "kvm record")) {
1106 ret = -EINVAL;
1107 goto out_delete;
1108 }
1109
1110 /*
1111 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1112 * traced in the old kernel.
1113 */
1114 ret = cpu_isa_config(kvm);
1115 if (ret < 0)
1116 goto out_delete;
1117
1118 ret = perf_session__process_events(kvm->session);
1119
1120out_delete:
1121 perf_session__delete(kvm->session);
1122 return ret;
1123}
1124
1125static int parse_target_str(struct perf_kvm_stat *kvm)
1126{
1127 if (kvm->opts.target.pid) {
1128 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1129 if (kvm->pid_list == NULL) {
1130 pr_err("Error parsing process id string\n");
1131 return -EINVAL;
1132 }
1133 }
1134
1135 return 0;
1136}
1137
1138static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1139{
1140 int ret = -EINVAL;
1141 int vcpu = kvm->trace_vcpu;
1142
1143 if (parse_target_str(kvm) != 0)
1144 goto exit;
1145
1146 if (!verify_vcpu(vcpu))
1147 goto exit;
1148
1149 if (!select_key(kvm))
1150 goto exit;
1151
1152 if (!register_kvm_events_ops(kvm))
1153 goto exit;
1154
1155 init_kvm_event_record(kvm);
1156 setup_pager();
1157
1158 ret = read_events(kvm);
1159 if (ret)
1160 goto exit;
1161
1162 sort_result(kvm);
1163 print_result(kvm);
1164
1165exit:
1166 return ret;
1167}
1168
1169#define STRDUP_FAIL_EXIT(s) \
1170 ({ char *_p; \
1171 _p = strdup(s); \
1172 if (!_p) \
1173 return -ENOMEM; \
1174 _p; \
1175 })
1176
1177int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1178{
1179 return 0;
1180}
1181
1182static int
1183kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1184{
1185 unsigned int rec_argc, i, j, events_tp_size;
1186 const char **rec_argv;
1187 const char * const record_args[] = {
1188 "record",
1189 "-R",
1190 "-m", "1024",
1191 "-c", "1",
1192 };
1193 const char * const kvm_stat_record_usage[] = {
1194 "perf kvm stat record [<options>]",
1195 NULL
1196 };
1197 const char * const *events_tp;
1198 int ret;
1199
1200 events_tp_size = 0;
1201 ret = setup_kvm_events_tp(kvm);
1202 if (ret < 0) {
1203 pr_err("Unable to setup the kvm tracepoints\n");
1204 return ret;
1205 }
1206
1207 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1208 events_tp_size++;
1209
1210 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1211 2 * events_tp_size;
1212 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1213
1214 if (rec_argv == NULL)
1215 return -ENOMEM;
1216
1217 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1218 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1219
1220 for (j = 0; j < events_tp_size; j++) {
1221 rec_argv[i++] = "-e";
1222 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1223 }
1224
1225 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1226 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1227
1228 for (j = 1; j < (unsigned int)argc; j++, i++)
1229 rec_argv[i] = argv[j];
1230
1231 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1232 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1233 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1234
1235 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1236 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1237 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1238 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1239 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1240 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1241 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1242 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1243 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1244 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1245 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1246 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1247 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1248 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1249 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1250
1251 record_usage = kvm_stat_record_usage;
1252 return cmd_record(i, rec_argv);
1253}
1254
1255static int
1256kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1257{
1258 const struct option kvm_events_report_options[] = {
1259 OPT_STRING(0, "event", &kvm->report_event, "report event",
1260 "event for reporting: vmexit, "
1261 "mmio (x86 only), ioport (x86 only)"),
1262 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1263 "vcpu id to report"),
1264 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1265 "key for sorting: sample(sort by samples number)"
1266 " time (sort by avg time)"),
1267 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1268 "analyze events only for given process id(s)"),
1269 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
1270 OPT_END()
1271 };
1272
1273 const char * const kvm_events_report_usage[] = {
1274 "perf kvm stat report [<options>]",
1275 NULL
1276 };
1277
1278 if (argc) {
1279 argc = parse_options(argc, argv,
1280 kvm_events_report_options,
1281 kvm_events_report_usage, 0);
1282 if (argc)
1283 usage_with_options(kvm_events_report_usage,
1284 kvm_events_report_options);
1285 }
1286
1287 if (!kvm->opts.target.pid)
1288 kvm->opts.target.system_wide = true;
1289
1290 return kvm_events_report_vcpu(kvm);
1291}
1292
1293#if defined(HAVE_TIMERFD_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
1294static struct evlist *kvm_live_event_list(void)
1295{
1296 struct evlist *evlist;
1297 char *tp, *name, *sys;
1298 int err = -1;
1299 const char * const *events_tp;
1300
1301 evlist = evlist__new();
1302 if (evlist == NULL)
1303 return NULL;
1304
1305 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1306
1307 tp = strdup(*events_tp);
1308 if (tp == NULL)
1309 goto out;
1310
1311 /* split tracepoint into subsystem and name */
1312 sys = tp;
1313 name = strchr(tp, ':');
1314 if (name == NULL) {
1315 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1316 *events_tp);
1317 free(tp);
1318 goto out;
1319 }
1320 *name = '\0';
1321 name++;
1322
1323 if (evlist__add_newtp(evlist, sys, name, NULL)) {
1324 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1325 free(tp);
1326 goto out;
1327 }
1328
1329 free(tp);
1330 }
1331
1332 err = 0;
1333
1334out:
1335 if (err) {
1336 evlist__delete(evlist);
1337 evlist = NULL;
1338 }
1339
1340 return evlist;
1341}
1342
1343static int kvm_events_live(struct perf_kvm_stat *kvm,
1344 int argc, const char **argv)
1345{
1346 char errbuf[BUFSIZ];
1347 int err;
1348
1349 const struct option live_options[] = {
1350 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1351 "record events on existing process id"),
1352 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1353 "number of mmap data pages", evlist__parse_mmap_pages),
1354 OPT_INCR('v', "verbose", &verbose,
1355 "be more verbose (show counter open errors, etc)"),
1356 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1357 "system-wide collection from all CPUs"),
1358 OPT_UINTEGER('d', "display", &kvm->display_time,
1359 "time in seconds between display updates"),
1360 OPT_STRING(0, "event", &kvm->report_event, "report event",
1361 "event for reporting: "
1362 "vmexit, mmio (x86 only), ioport (x86 only)"),
1363 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1364 "vcpu id to report"),
1365 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1366 "key for sorting: sample(sort by samples number)"
1367 " time (sort by avg time)"),
1368 OPT_U64(0, "duration", &kvm->duration,
1369 "show events other than"
1370 " HLT (x86 only) or Wait state (s390 only)"
1371 " that take longer than duration usecs"),
1372 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
1373 "per thread proc mmap processing timeout in ms"),
1374 OPT_END()
1375 };
1376 const char * const live_usage[] = {
1377 "perf kvm stat live [<options>]",
1378 NULL
1379 };
1380 struct perf_data data = {
1381 .mode = PERF_DATA_MODE_WRITE,
1382 };
1383
1384
1385 /* event handling */
1386 kvm->tool.sample = process_sample_event;
1387 kvm->tool.comm = perf_event__process_comm;
1388 kvm->tool.exit = perf_event__process_exit;
1389 kvm->tool.fork = perf_event__process_fork;
1390 kvm->tool.lost = process_lost_event;
1391 kvm->tool.namespaces = perf_event__process_namespaces;
1392 kvm->tool.ordered_events = true;
1393 perf_tool__fill_defaults(&kvm->tool);
1394
1395 /* set defaults */
1396 kvm->display_time = 1;
1397 kvm->opts.user_interval = 1;
1398 kvm->opts.mmap_pages = 512;
1399 kvm->opts.target.uses_mmap = false;
1400 kvm->opts.target.uid_str = NULL;
1401 kvm->opts.target.uid = UINT_MAX;
1402
1403 symbol__init(NULL);
1404 disable_buildid_cache();
1405
1406 use_browser = 0;
1407
1408 if (argc) {
1409 argc = parse_options(argc, argv, live_options,
1410 live_usage, 0);
1411 if (argc)
1412 usage_with_options(live_usage, live_options);
1413 }
1414
1415 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1416
1417 /*
1418 * target related setups
1419 */
1420 err = target__validate(&kvm->opts.target);
1421 if (err) {
1422 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1423 ui__warning("%s", errbuf);
1424 }
1425
1426 if (target__none(&kvm->opts.target))
1427 kvm->opts.target.system_wide = true;
1428
1429
1430 /*
1431 * generate the event list
1432 */
1433 err = setup_kvm_events_tp(kvm);
1434 if (err < 0) {
1435 pr_err("Unable to setup the kvm tracepoints\n");
1436 return err;
1437 }
1438
1439 kvm->evlist = kvm_live_event_list();
1440 if (kvm->evlist == NULL) {
1441 err = -1;
1442 goto out;
1443 }
1444
1445 if (evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1446 usage_with_options(live_usage, live_options);
1447
1448 /*
1449 * perf session
1450 */
1451 kvm->session = perf_session__new(&data, &kvm->tool);
1452 if (IS_ERR(kvm->session)) {
1453 err = PTR_ERR(kvm->session);
1454 goto out;
1455 }
1456 kvm->session->evlist = kvm->evlist;
1457 perf_session__set_id_hdr_size(kvm->session);
1458 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1459 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1460 kvm->evlist->core.threads, true, false, 1);
1461 err = kvm_live_open_events(kvm);
1462 if (err)
1463 goto out;
1464
1465 err = kvm_events_live_report(kvm);
1466
1467out:
1468 perf_session__delete(kvm->session);
1469 kvm->session = NULL;
1470 evlist__delete(kvm->evlist);
1471
1472 return err;
1473}
1474#endif
1475
1476static void print_kvm_stat_usage(void)
1477{
1478 printf("Usage: perf kvm stat <command>\n\n");
1479
1480 printf("# Available commands:\n");
1481 printf("\trecord: record kvm events\n");
1482 printf("\treport: report statistical data of kvm events\n");
1483 printf("\tlive: live reporting of statistical data of kvm events\n");
1484
1485 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1486}
1487
1488static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1489{
1490 struct perf_kvm_stat kvm = {
1491 .file_name = file_name,
1492
1493 .trace_vcpu = -1,
1494 .report_event = "vmexit",
1495 .sort_key = "sample",
1496
1497 };
1498
1499 if (argc == 1) {
1500 print_kvm_stat_usage();
1501 goto perf_stat;
1502 }
1503
1504 if (strlen(argv[1]) > 2 && strstarts("record", argv[1]))
1505 return kvm_events_record(&kvm, argc - 1, argv + 1);
1506
1507 if (strlen(argv[1]) > 2 && strstarts("report", argv[1]))
1508 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1509
1510#if defined(HAVE_TIMERFD_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
1511 if (!strncmp(argv[1], "live", 4))
1512 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1513#endif
1514
1515perf_stat:
1516 return cmd_stat(argc, argv);
1517}
1518#endif /* HAVE_KVM_STAT_SUPPORT */
1519
1520int __weak kvm_add_default_arch_event(int *argc __maybe_unused,
1521 const char **argv __maybe_unused)
1522{
1523 return 0;
1524}
1525
1526static int __cmd_record(const char *file_name, int argc, const char **argv)
1527{
1528 int rec_argc, i = 0, j, ret;
1529 const char **rec_argv;
1530
1531 ret = kvm_add_default_arch_event(&argc, argv);
1532 if (ret)
1533 return -EINVAL;
1534
1535 rec_argc = argc + 2;
1536 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1537 rec_argv[i++] = strdup("record");
1538 rec_argv[i++] = strdup("-o");
1539 rec_argv[i++] = strdup(file_name);
1540 for (j = 1; j < argc; j++, i++)
1541 rec_argv[i] = argv[j];
1542
1543 BUG_ON(i != rec_argc);
1544
1545 return cmd_record(i, rec_argv);
1546}
1547
1548static int __cmd_report(const char *file_name, int argc, const char **argv)
1549{
1550 int rec_argc, i = 0, j;
1551 const char **rec_argv;
1552
1553 rec_argc = argc + 2;
1554 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1555 rec_argv[i++] = strdup("report");
1556 rec_argv[i++] = strdup("-i");
1557 rec_argv[i++] = strdup(file_name);
1558 for (j = 1; j < argc; j++, i++)
1559 rec_argv[i] = argv[j];
1560
1561 BUG_ON(i != rec_argc);
1562
1563 return cmd_report(i, rec_argv);
1564}
1565
1566static int
1567__cmd_buildid_list(const char *file_name, int argc, const char **argv)
1568{
1569 int rec_argc, i = 0, j;
1570 const char **rec_argv;
1571
1572 rec_argc = argc + 2;
1573 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1574 rec_argv[i++] = strdup("buildid-list");
1575 rec_argv[i++] = strdup("-i");
1576 rec_argv[i++] = strdup(file_name);
1577 for (j = 1; j < argc; j++, i++)
1578 rec_argv[i] = argv[j];
1579
1580 BUG_ON(i != rec_argc);
1581
1582 return cmd_buildid_list(i, rec_argv);
1583}
1584
1585int cmd_kvm(int argc, const char **argv)
1586{
1587 const char *file_name = NULL;
1588 const struct option kvm_options[] = {
1589 OPT_STRING('i', "input", &file_name, "file",
1590 "Input file name"),
1591 OPT_STRING('o', "output", &file_name, "file",
1592 "Output file name"),
1593 OPT_BOOLEAN(0, "guest", &perf_guest,
1594 "Collect guest os data"),
1595 OPT_BOOLEAN(0, "host", &perf_host,
1596 "Collect host os data"),
1597 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1598 "guest mount directory under which every guest os"
1599 " instance has a subdir"),
1600 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1601 "file", "file saving guest os vmlinux"),
1602 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1603 "file", "file saving guest os /proc/kallsyms"),
1604 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1605 "file", "file saving guest os /proc/modules"),
1606 OPT_BOOLEAN(0, "guest-code", &symbol_conf.guest_code,
1607 "Guest code can be found in hypervisor process"),
1608 OPT_INCR('v', "verbose", &verbose,
1609 "be more verbose (show counter open errors, etc)"),
1610 OPT_END()
1611 };
1612
1613 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1614 "buildid-list", "stat", NULL };
1615 const char *kvm_usage[] = { NULL, NULL };
1616
1617 perf_host = 0;
1618 perf_guest = 1;
1619
1620 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1621 PARSE_OPT_STOP_AT_NON_OPTION);
1622 if (!argc)
1623 usage_with_options(kvm_usage, kvm_options);
1624
1625 if (!perf_host)
1626 perf_guest = 1;
1627
1628 if (!file_name) {
1629 file_name = get_filename_for_perf_kvm();
1630
1631 if (!file_name) {
1632 pr_err("Failed to allocate memory for filename\n");
1633 return -ENOMEM;
1634 }
1635 }
1636
1637 if (strlen(argv[0]) > 2 && strstarts("record", argv[0]))
1638 return __cmd_record(file_name, argc, argv);
1639 else if (strlen(argv[0]) > 2 && strstarts("report", argv[0]))
1640 return __cmd_report(file_name, argc, argv);
1641 else if (strlen(argv[0]) > 2 && strstarts("diff", argv[0]))
1642 return cmd_diff(argc, argv);
1643 else if (!strcmp(argv[0], "top"))
1644 return cmd_top(argc, argv);
1645 else if (strlen(argv[0]) > 2 && strstarts("buildid-list", argv[0]))
1646 return __cmd_buildid_list(file_name, argc, argv);
1647#if defined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
1648 else if (strlen(argv[0]) > 2 && strstarts("stat", argv[0]))
1649 return kvm_cmd_stat(file_name, argc, argv);
1650#endif
1651 else
1652 usage_with_options(kvm_usage, kvm_options);
1653
1654 return 0;
1655}
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
43static 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
60void 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
68bool kvm_exit_event(struct perf_evsel *evsel)
69{
70 return !strcmp(evsel->name, kvm_exit_trace);
71}
72
73bool 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
84bool kvm_entry_event(struct perf_evsel *evsel)
85{
86 return !strcmp(evsel->name, kvm_entry_trace);
87}
88
89bool 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
96static 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
111void 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
121static 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
135struct vcpu_event_record {
136 int vcpu_id;
137 u64 start_time;
138 struct kvm_event *last_event;
139};
140
141
142static 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
151static 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
174static int kvm_events_hash_fn(u64 key)
175{
176 return key & (EVENTS_CACHE_SIZE - 1);
177}
178
179static 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
204static 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
219static 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
241static 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
255static void
256kvm_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
262static 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
273static 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
288static 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
310static 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
325static 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
336static 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
397static
398struct 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
420static 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) \
451static 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) \
463GET_EVENT_KEY(func, field) \
464static 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
471GET_EVENT_KEY(time, time);
472COMPARE_EVENT_KEY(count, stats.n);
473COMPARE_EVENT_KEY(mean, stats.mean);
474GET_EVENT_KEY(max, stats.max);
475GET_EVENT_KEY(min, stats.min);
476
477#define DEF_SORT_NAME_KEY(name, compare_key) \
478 { #name, compare_kvm_event_ ## compare_key }
479
480static struct kvm_event_key keys[] = {
481 DEF_SORT_NAME_KEY(sample, count),
482 DEF_SORT_NAME_KEY(time, mean),
483 { NULL, NULL }
484};
485
486static 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
501static 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
522static void
523update_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
531static bool event_is_valid(struct kvm_event *event, int vcpu)
532{
533 return !!get_event_count(event, vcpu);
534}
535
536static 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 */
554static 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
565static 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
584static 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, <ime)) {
592 strftime(date, sizeof(date), "%H:%M:%S", <ime);
593 pr_info("%s.%06ld", date, tv.tv_usec);
594 } else
595 pr_info("00:00:00.000000");
596
597 return;
598}
599
600static 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
651static 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
663static 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
672static 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
700static 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
727static 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
743static 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, ×tamp);
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
793static 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
836static volatile int done;
837
838static void sig_handler(int sig __maybe_unused)
839{
840 done = 1;
841}
842
843static 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;
866out:
867 return rc;
868}
869
870static 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
905static 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
923static 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
934static 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
1003out:
1004 if (kvm->timerfd >= 0)
1005 close(kvm->timerfd);
1006
1007 tcsetattr(0, TCSAFLUSH, &save);
1008 return err;
1009}
1010
1011static 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
1067out:
1068 return rc;
1069}
1070#endif
1071
1072static 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 .file = {
1084 .path = kvm->file_name,
1085 },
1086 .mode = PERF_DATA_MODE_READ,
1087 .force = kvm->force,
1088 };
1089
1090 kvm->tool = eops;
1091 kvm->session = perf_session__new(&file, false, &kvm->tool);
1092 if (!kvm->session) {
1093 pr_err("Initializing perf session failed\n");
1094 return -1;
1095 }
1096
1097 symbol__init(&kvm->session->header.env);
1098
1099 if (!perf_session__has_traces(kvm->session, "kvm record")) {
1100 ret = -EINVAL;
1101 goto out_delete;
1102 }
1103
1104 /*
1105 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1106 * traced in the old kernel.
1107 */
1108 ret = cpu_isa_config(kvm);
1109 if (ret < 0)
1110 goto out_delete;
1111
1112 ret = perf_session__process_events(kvm->session);
1113
1114out_delete:
1115 perf_session__delete(kvm->session);
1116 return ret;
1117}
1118
1119static int parse_target_str(struct perf_kvm_stat *kvm)
1120{
1121 if (kvm->opts.target.pid) {
1122 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1123 if (kvm->pid_list == NULL) {
1124 pr_err("Error parsing process id string\n");
1125 return -EINVAL;
1126 }
1127 }
1128
1129 return 0;
1130}
1131
1132static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1133{
1134 int ret = -EINVAL;
1135 int vcpu = kvm->trace_vcpu;
1136
1137 if (parse_target_str(kvm) != 0)
1138 goto exit;
1139
1140 if (!verify_vcpu(vcpu))
1141 goto exit;
1142
1143 if (!select_key(kvm))
1144 goto exit;
1145
1146 if (!register_kvm_events_ops(kvm))
1147 goto exit;
1148
1149 init_kvm_event_record(kvm);
1150 setup_pager();
1151
1152 ret = read_events(kvm);
1153 if (ret)
1154 goto exit;
1155
1156 sort_result(kvm);
1157 print_result(kvm);
1158
1159exit:
1160 return ret;
1161}
1162
1163#define STRDUP_FAIL_EXIT(s) \
1164 ({ char *_p; \
1165 _p = strdup(s); \
1166 if (!_p) \
1167 return -ENOMEM; \
1168 _p; \
1169 })
1170
1171int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1172{
1173 return 0;
1174}
1175
1176static int
1177kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1178{
1179 unsigned int rec_argc, i, j, events_tp_size;
1180 const char **rec_argv;
1181 const char * const record_args[] = {
1182 "record",
1183 "-R",
1184 "-m", "1024",
1185 "-c", "1",
1186 };
1187 const char * const kvm_stat_record_usage[] = {
1188 "perf kvm stat record [<options>]",
1189 NULL
1190 };
1191 const char * const *events_tp;
1192 int ret;
1193
1194 events_tp_size = 0;
1195 ret = setup_kvm_events_tp(kvm);
1196 if (ret < 0) {
1197 pr_err("Unable to setup the kvm tracepoints\n");
1198 return ret;
1199 }
1200
1201 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1202 events_tp_size++;
1203
1204 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1205 2 * events_tp_size;
1206 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1207
1208 if (rec_argv == NULL)
1209 return -ENOMEM;
1210
1211 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1212 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1213
1214 for (j = 0; j < events_tp_size; j++) {
1215 rec_argv[i++] = "-e";
1216 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1217 }
1218
1219 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1220 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1221
1222 for (j = 1; j < (unsigned int)argc; j++, i++)
1223 rec_argv[i] = argv[j];
1224
1225 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1226 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1227 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1228
1229 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1230 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1231 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1232 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1233 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1234 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1235 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1236 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1237 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1238 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1239 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1240 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1241 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1242 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1243 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1244
1245 record_usage = kvm_stat_record_usage;
1246 return cmd_record(i, rec_argv);
1247}
1248
1249static int
1250kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1251{
1252 const struct option kvm_events_report_options[] = {
1253 OPT_STRING(0, "event", &kvm->report_event, "report event",
1254 "event for reporting: vmexit, "
1255 "mmio (x86 only), ioport (x86 only)"),
1256 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1257 "vcpu id to report"),
1258 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1259 "key for sorting: sample(sort by samples number)"
1260 " time (sort by avg time)"),
1261 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1262 "analyze events only for given process id(s)"),
1263 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
1264 OPT_END()
1265 };
1266
1267 const char * const kvm_events_report_usage[] = {
1268 "perf kvm stat report [<options>]",
1269 NULL
1270 };
1271
1272 if (argc) {
1273 argc = parse_options(argc, argv,
1274 kvm_events_report_options,
1275 kvm_events_report_usage, 0);
1276 if (argc)
1277 usage_with_options(kvm_events_report_usage,
1278 kvm_events_report_options);
1279 }
1280
1281 if (!kvm->opts.target.pid)
1282 kvm->opts.target.system_wide = true;
1283
1284 return kvm_events_report_vcpu(kvm);
1285}
1286
1287#ifdef HAVE_TIMERFD_SUPPORT
1288static struct perf_evlist *kvm_live_event_list(void)
1289{
1290 struct perf_evlist *evlist;
1291 char *tp, *name, *sys;
1292 int err = -1;
1293 const char * const *events_tp;
1294
1295 evlist = perf_evlist__new();
1296 if (evlist == NULL)
1297 return NULL;
1298
1299 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1300
1301 tp = strdup(*events_tp);
1302 if (tp == NULL)
1303 goto out;
1304
1305 /* split tracepoint into subsystem and name */
1306 sys = tp;
1307 name = strchr(tp, ':');
1308 if (name == NULL) {
1309 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1310 *events_tp);
1311 free(tp);
1312 goto out;
1313 }
1314 *name = '\0';
1315 name++;
1316
1317 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1318 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1319 free(tp);
1320 goto out;
1321 }
1322
1323 free(tp);
1324 }
1325
1326 err = 0;
1327
1328out:
1329 if (err) {
1330 perf_evlist__delete(evlist);
1331 evlist = NULL;
1332 }
1333
1334 return evlist;
1335}
1336
1337static int kvm_events_live(struct perf_kvm_stat *kvm,
1338 int argc, const char **argv)
1339{
1340 char errbuf[BUFSIZ];
1341 int err;
1342
1343 const struct option live_options[] = {
1344 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1345 "record events on existing process id"),
1346 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1347 "number of mmap data pages",
1348 perf_evlist__parse_mmap_pages),
1349 OPT_INCR('v', "verbose", &verbose,
1350 "be more verbose (show counter open errors, etc)"),
1351 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1352 "system-wide collection from all CPUs"),
1353 OPT_UINTEGER('d', "display", &kvm->display_time,
1354 "time in seconds between display updates"),
1355 OPT_STRING(0, "event", &kvm->report_event, "report event",
1356 "event for reporting: "
1357 "vmexit, mmio (x86 only), ioport (x86 only)"),
1358 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1359 "vcpu id to report"),
1360 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1361 "key for sorting: sample(sort by samples number)"
1362 " time (sort by avg time)"),
1363 OPT_U64(0, "duration", &kvm->duration,
1364 "show events other than"
1365 " HLT (x86 only) or Wait state (s390 only)"
1366 " that take longer than duration usecs"),
1367 OPT_UINTEGER(0, "proc-map-timeout", &kvm->opts.proc_map_timeout,
1368 "per thread proc mmap processing timeout in ms"),
1369 OPT_END()
1370 };
1371 const char * const live_usage[] = {
1372 "perf kvm stat live [<options>]",
1373 NULL
1374 };
1375 struct perf_data data = {
1376 .mode = PERF_DATA_MODE_WRITE,
1377 };
1378
1379
1380 /* event handling */
1381 kvm->tool.sample = process_sample_event;
1382 kvm->tool.comm = perf_event__process_comm;
1383 kvm->tool.exit = perf_event__process_exit;
1384 kvm->tool.fork = perf_event__process_fork;
1385 kvm->tool.lost = process_lost_event;
1386 kvm->tool.namespaces = perf_event__process_namespaces;
1387 kvm->tool.ordered_events = true;
1388 perf_tool__fill_defaults(&kvm->tool);
1389
1390 /* set defaults */
1391 kvm->display_time = 1;
1392 kvm->opts.user_interval = 1;
1393 kvm->opts.mmap_pages = 512;
1394 kvm->opts.target.uses_mmap = false;
1395 kvm->opts.target.uid_str = NULL;
1396 kvm->opts.target.uid = UINT_MAX;
1397 kvm->opts.proc_map_timeout = 500;
1398
1399 symbol__init(NULL);
1400 disable_buildid_cache();
1401
1402 use_browser = 0;
1403
1404 if (argc) {
1405 argc = parse_options(argc, argv, live_options,
1406 live_usage, 0);
1407 if (argc)
1408 usage_with_options(live_usage, live_options);
1409 }
1410
1411 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1412
1413 /*
1414 * target related setups
1415 */
1416 err = target__validate(&kvm->opts.target);
1417 if (err) {
1418 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1419 ui__warning("%s", errbuf);
1420 }
1421
1422 if (target__none(&kvm->opts.target))
1423 kvm->opts.target.system_wide = true;
1424
1425
1426 /*
1427 * generate the event list
1428 */
1429 err = setup_kvm_events_tp(kvm);
1430 if (err < 0) {
1431 pr_err("Unable to setup the kvm tracepoints\n");
1432 return err;
1433 }
1434
1435 kvm->evlist = kvm_live_event_list();
1436 if (kvm->evlist == NULL) {
1437 err = -1;
1438 goto out;
1439 }
1440
1441 symbol_conf.nr_events = kvm->evlist->nr_entries;
1442
1443 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1444 usage_with_options(live_usage, live_options);
1445
1446 /*
1447 * perf session
1448 */
1449 kvm->session = perf_session__new(&data, false, &kvm->tool);
1450 if (kvm->session == NULL) {
1451 err = -1;
1452 goto out;
1453 }
1454 kvm->session->evlist = kvm->evlist;
1455 perf_session__set_id_hdr_size(kvm->session);
1456 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1457 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1458 kvm->evlist->threads, false,
1459 kvm->opts.proc_map_timeout, 1);
1460 err = kvm_live_open_events(kvm);
1461 if (err)
1462 goto out;
1463
1464 err = kvm_events_live_report(kvm);
1465
1466out:
1467 perf_session__delete(kvm->session);
1468 kvm->session = NULL;
1469 perf_evlist__delete(kvm->evlist);
1470
1471 return err;
1472}
1473#endif
1474
1475static void print_kvm_stat_usage(void)
1476{
1477 printf("Usage: perf kvm stat <command>\n\n");
1478
1479 printf("# Available commands:\n");
1480 printf("\trecord: record kvm events\n");
1481 printf("\treport: report statistical data of kvm events\n");
1482 printf("\tlive: live reporting of statistical data of kvm events\n");
1483
1484 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1485}
1486
1487static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1488{
1489 struct perf_kvm_stat kvm = {
1490 .file_name = file_name,
1491
1492 .trace_vcpu = -1,
1493 .report_event = "vmexit",
1494 .sort_key = "sample",
1495
1496 };
1497
1498 if (argc == 1) {
1499 print_kvm_stat_usage();
1500 goto perf_stat;
1501 }
1502
1503 if (!strncmp(argv[1], "rec", 3))
1504 return kvm_events_record(&kvm, argc - 1, argv + 1);
1505
1506 if (!strncmp(argv[1], "rep", 3))
1507 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1508
1509#ifdef HAVE_TIMERFD_SUPPORT
1510 if (!strncmp(argv[1], "live", 4))
1511 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1512#endif
1513
1514perf_stat:
1515 return cmd_stat(argc, argv);
1516}
1517#endif /* HAVE_KVM_STAT_SUPPORT */
1518
1519static int __cmd_record(const char *file_name, int argc, const char **argv)
1520{
1521 int rec_argc, i = 0, j;
1522 const char **rec_argv;
1523
1524 rec_argc = argc + 2;
1525 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1526 rec_argv[i++] = strdup("record");
1527 rec_argv[i++] = strdup("-o");
1528 rec_argv[i++] = strdup(file_name);
1529 for (j = 1; j < argc; j++, i++)
1530 rec_argv[i] = argv[j];
1531
1532 BUG_ON(i != rec_argc);
1533
1534 return cmd_record(i, rec_argv);
1535}
1536
1537static int __cmd_report(const char *file_name, int argc, const char **argv)
1538{
1539 int rec_argc, i = 0, j;
1540 const char **rec_argv;
1541
1542 rec_argc = argc + 2;
1543 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1544 rec_argv[i++] = strdup("report");
1545 rec_argv[i++] = strdup("-i");
1546 rec_argv[i++] = strdup(file_name);
1547 for (j = 1; j < argc; j++, i++)
1548 rec_argv[i] = argv[j];
1549
1550 BUG_ON(i != rec_argc);
1551
1552 return cmd_report(i, rec_argv);
1553}
1554
1555static int
1556__cmd_buildid_list(const char *file_name, int argc, const char **argv)
1557{
1558 int rec_argc, i = 0, j;
1559 const char **rec_argv;
1560
1561 rec_argc = argc + 2;
1562 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1563 rec_argv[i++] = strdup("buildid-list");
1564 rec_argv[i++] = strdup("-i");
1565 rec_argv[i++] = strdup(file_name);
1566 for (j = 1; j < argc; j++, i++)
1567 rec_argv[i] = argv[j];
1568
1569 BUG_ON(i != rec_argc);
1570
1571 return cmd_buildid_list(i, rec_argv);
1572}
1573
1574int cmd_kvm(int argc, const char **argv)
1575{
1576 const char *file_name = NULL;
1577 const struct option kvm_options[] = {
1578 OPT_STRING('i', "input", &file_name, "file",
1579 "Input file name"),
1580 OPT_STRING('o', "output", &file_name, "file",
1581 "Output file name"),
1582 OPT_BOOLEAN(0, "guest", &perf_guest,
1583 "Collect guest os data"),
1584 OPT_BOOLEAN(0, "host", &perf_host,
1585 "Collect host os data"),
1586 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1587 "guest mount directory under which every guest os"
1588 " instance has a subdir"),
1589 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1590 "file", "file saving guest os vmlinux"),
1591 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1592 "file", "file saving guest os /proc/kallsyms"),
1593 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1594 "file", "file saving guest os /proc/modules"),
1595 OPT_INCR('v', "verbose", &verbose,
1596 "be more verbose (show counter open errors, etc)"),
1597 OPT_END()
1598 };
1599
1600 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1601 "buildid-list", "stat", NULL };
1602 const char *kvm_usage[] = { NULL, NULL };
1603
1604 perf_host = 0;
1605 perf_guest = 1;
1606
1607 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1608 PARSE_OPT_STOP_AT_NON_OPTION);
1609 if (!argc)
1610 usage_with_options(kvm_usage, kvm_options);
1611
1612 if (!perf_host)
1613 perf_guest = 1;
1614
1615 if (!file_name) {
1616 file_name = get_filename_for_perf_kvm();
1617
1618 if (!file_name) {
1619 pr_err("Failed to allocate memory for filename\n");
1620 return -ENOMEM;
1621 }
1622 }
1623
1624 if (!strncmp(argv[0], "rec", 3))
1625 return __cmd_record(file_name, argc, argv);
1626 else if (!strncmp(argv[0], "rep", 3))
1627 return __cmd_report(file_name, argc, argv);
1628 else if (!strncmp(argv[0], "diff", 4))
1629 return cmd_diff(argc, argv);
1630 else if (!strncmp(argv[0], "top", 3))
1631 return cmd_top(argc, argv);
1632 else if (!strncmp(argv[0], "buildid-list", 12))
1633 return __cmd_buildid_list(file_name, argc, argv);
1634#ifdef HAVE_KVM_STAT_SUPPORT
1635 else if (!strncmp(argv[0], "stat", 4))
1636 return kvm_cmd_stat(file_name, argc, argv);
1637#endif
1638 else
1639 usage_with_options(kvm_usage, kvm_options);
1640
1641 return 0;
1642}