4 #include "util/evsel.h"
5 #include "util/evlist.h"
7 #include "util/cache.h"
8 #include "util/symbol.h"
9 #include "util/thread.h"
10 #include "util/header.h"
11 #include "util/session.h"
12 #include "util/intlist.h"
13 #include "util/parse-options.h"
14 #include "util/trace-event.h"
15 #include "util/debug.h"
16 #include <api/fs/debugfs.h>
17 #include "util/tool.h"
18 #include "util/stat.h"
20 #include "util/data.h"
22 #include <sys/prctl.h>
23 #ifdef HAVE_TIMERFD_SUPPORT
24 #include <sys/timerfd.h>
28 #include <semaphore.h>
32 #ifdef HAVE_KVM_STAT_SUPPORT
33 #include <asm/kvm_perf.h>
34 #include "util/kvm-stat.h"
36 void exit_event_get_key(struct perf_evsel *evsel,
37 struct perf_sample *sample,
38 struct event_key *key)
41 key->key = perf_evsel__intval(evsel, sample, KVM_EXIT_REASON);
44 bool kvm_exit_event(struct perf_evsel *evsel)
46 return !strcmp(evsel->name, KVM_EXIT_TRACE);
49 bool exit_event_begin(struct perf_evsel *evsel,
50 struct perf_sample *sample, struct event_key *key)
52 if (kvm_exit_event(evsel)) {
53 exit_event_get_key(evsel, sample, key);
60 bool kvm_entry_event(struct perf_evsel *evsel)
62 return !strcmp(evsel->name, KVM_ENTRY_TRACE);
65 bool exit_event_end(struct perf_evsel *evsel,
66 struct perf_sample *sample __maybe_unused,
67 struct event_key *key __maybe_unused)
69 return kvm_entry_event(evsel);
72 static const char *get_exit_reason(struct perf_kvm_stat *kvm,
73 struct exit_reasons_table *tbl,
76 while (tbl->reason != NULL) {
77 if (tbl->exit_code == exit_code)
82 pr_err("unknown kvm exit code:%lld on %s\n",
83 (unsigned long long)exit_code, kvm->exit_reasons_isa);
87 void exit_event_decode_key(struct perf_kvm_stat *kvm,
88 struct event_key *key,
91 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
94 scnprintf(decode, DECODE_STR_LEN, "%s", exit_reason);
97 static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
99 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
101 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) {
102 if (!strcmp(events_ops->name, kvm->report_event)) {
103 kvm->events_ops = events_ops->ops;
111 struct vcpu_event_record {
114 struct kvm_event *last_event;
118 static void init_kvm_event_record(struct perf_kvm_stat *kvm)
122 for (i = 0; i < EVENTS_CACHE_SIZE; i++)
123 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
126 #ifdef HAVE_TIMERFD_SUPPORT
127 static void clear_events_cache_stats(struct list_head *kvm_events_cache)
129 struct list_head *head;
130 struct kvm_event *event;
134 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
135 head = &kvm_events_cache[i];
136 list_for_each_entry(event, head, hash_entry) {
137 /* reset stats for event */
138 event->total.time = 0;
139 init_stats(&event->total.stats);
141 for (j = 0; j < event->max_vcpu; ++j) {
142 event->vcpu[j].time = 0;
143 init_stats(&event->vcpu[j].stats);
150 static int kvm_events_hash_fn(u64 key)
152 return key & (EVENTS_CACHE_SIZE - 1);
155 static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
157 int old_max_vcpu = event->max_vcpu;
160 if (vcpu_id < event->max_vcpu)
163 while (event->max_vcpu <= vcpu_id)
164 event->max_vcpu += DEFAULT_VCPU_NUM;
167 event->vcpu = realloc(event->vcpu,
168 event->max_vcpu * sizeof(*event->vcpu));
171 pr_err("Not enough memory\n");
175 memset(event->vcpu + old_max_vcpu, 0,
176 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
180 static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
182 struct kvm_event *event;
184 event = zalloc(sizeof(*event));
186 pr_err("Not enough memory\n");
191 init_stats(&event->total.stats);
195 static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
196 struct event_key *key)
198 struct kvm_event *event;
199 struct list_head *head;
201 BUG_ON(key->key == INVALID_KEY);
203 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
204 list_for_each_entry(event, head, hash_entry) {
205 if (event->key.key == key->key && event->key.info == key->info)
209 event = kvm_alloc_init_event(key);
213 list_add(&event->hash_entry, head);
217 static bool handle_begin_event(struct perf_kvm_stat *kvm,
218 struct vcpu_event_record *vcpu_record,
219 struct event_key *key, u64 timestamp)
221 struct kvm_event *event = NULL;
223 if (key->key != INVALID_KEY)
224 event = find_create_kvm_event(kvm, key);
226 vcpu_record->last_event = event;
227 vcpu_record->start_time = timestamp;
232 kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
234 kvm_stats->time += time_diff;
235 update_stats(&kvm_stats->stats, time_diff);
238 static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
240 struct kvm_event_stats *kvm_stats = &event->total;
243 kvm_stats = &event->vcpu[vcpu_id];
245 return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
246 avg_stats(&kvm_stats->stats));
249 static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
253 kvm_update_event_stats(&event->total, time_diff);
257 if (!kvm_event_expand(event, vcpu_id))
260 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
264 static bool is_child_event(struct perf_kvm_stat *kvm,
265 struct perf_evsel *evsel,
266 struct perf_sample *sample,
267 struct event_key *key)
269 struct child_event_ops *child_ops;
271 child_ops = kvm->events_ops->child_ops;
276 for (; child_ops->name; child_ops++) {
277 if (!strcmp(evsel->name, child_ops->name)) {
278 child_ops->get_key(evsel, sample, key);
286 static bool handle_child_event(struct perf_kvm_stat *kvm,
287 struct vcpu_event_record *vcpu_record,
288 struct event_key *key,
289 struct perf_sample *sample __maybe_unused)
291 struct kvm_event *event = NULL;
293 if (key->key != INVALID_KEY)
294 event = find_create_kvm_event(kvm, key);
296 vcpu_record->last_event = event;
301 static bool skip_event(const char *event)
303 const char * const *skip_events;
305 for (skip_events = kvm_skip_events; *skip_events; skip_events++)
306 if (!strcmp(event, *skip_events))
312 static bool handle_end_event(struct perf_kvm_stat *kvm,
313 struct vcpu_event_record *vcpu_record,
314 struct event_key *key,
315 struct perf_sample *sample)
317 struct kvm_event *event;
318 u64 time_begin, time_diff;
321 if (kvm->trace_vcpu == -1)
324 vcpu = vcpu_record->vcpu_id;
326 event = vcpu_record->last_event;
327 time_begin = vcpu_record->start_time;
329 /* The begin event is not caught. */
334 * In some case, the 'begin event' only records the start timestamp,
335 * the actual event is recognized in the 'end event' (e.g. mmio-event).
338 /* Both begin and end events did not get the key. */
339 if (!event && key->key == INVALID_KEY)
343 event = find_create_kvm_event(kvm, key);
348 vcpu_record->last_event = NULL;
349 vcpu_record->start_time = 0;
351 /* seems to happen once in a while during live mode */
352 if (sample->time < time_begin) {
353 pr_debug("End time before begin time; skipping event.\n");
357 time_diff = sample->time - time_begin;
359 if (kvm->duration && time_diff > kvm->duration) {
360 char decode[DECODE_STR_LEN];
362 kvm->events_ops->decode_key(kvm, &event->key, decode);
363 if (!skip_event(decode)) {
364 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
365 sample->time, sample->pid, vcpu_record->vcpu_id,
366 decode, time_diff/1000);
370 return update_kvm_event(event, vcpu, time_diff);
374 struct vcpu_event_record *per_vcpu_record(struct thread *thread,
375 struct perf_evsel *evsel,
376 struct perf_sample *sample)
378 /* Only kvm_entry records vcpu id. */
379 if (!thread__priv(thread) && kvm_entry_event(evsel)) {
380 struct vcpu_event_record *vcpu_record;
382 vcpu_record = zalloc(sizeof(*vcpu_record));
384 pr_err("%s: Not enough memory\n", __func__);
388 vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample, VCPU_ID);
389 thread__set_priv(thread, vcpu_record);
392 return thread__priv(thread);
395 static bool handle_kvm_event(struct perf_kvm_stat *kvm,
396 struct thread *thread,
397 struct perf_evsel *evsel,
398 struct perf_sample *sample)
400 struct vcpu_event_record *vcpu_record;
401 struct event_key key = { .key = INVALID_KEY,
402 .exit_reasons = kvm->exit_reasons };
404 vcpu_record = per_vcpu_record(thread, evsel, sample);
408 /* only process events for vcpus user cares about */
409 if ((kvm->trace_vcpu != -1) &&
410 (kvm->trace_vcpu != vcpu_record->vcpu_id))
413 if (kvm->events_ops->is_begin_event(evsel, sample, &key))
414 return handle_begin_event(kvm, vcpu_record, &key, sample->time);
416 if (is_child_event(kvm, evsel, sample, &key))
417 return handle_child_event(kvm, vcpu_record, &key, sample);
419 if (kvm->events_ops->is_end_event(evsel, sample, &key))
420 return handle_end_event(kvm, vcpu_record, &key, sample);
425 #define GET_EVENT_KEY(func, field) \
426 static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
429 return event->total.field; \
431 if (vcpu >= event->max_vcpu) \
434 return event->vcpu[vcpu].field; \
437 #define COMPARE_EVENT_KEY(func, field) \
438 GET_EVENT_KEY(func, field) \
439 static int compare_kvm_event_ ## func(struct kvm_event *one, \
440 struct kvm_event *two, int vcpu)\
442 return get_event_ ##func(one, vcpu) > \
443 get_event_ ##func(two, vcpu); \
446 GET_EVENT_KEY(time, time);
447 COMPARE_EVENT_KEY(count, stats.n);
448 COMPARE_EVENT_KEY(mean, stats.mean);
449 GET_EVENT_KEY(max, stats.max);
450 GET_EVENT_KEY(min, stats.min);
452 #define DEF_SORT_NAME_KEY(name, compare_key) \
453 { #name, compare_kvm_event_ ## compare_key }
455 static struct kvm_event_key keys[] = {
456 DEF_SORT_NAME_KEY(sample, count),
457 DEF_SORT_NAME_KEY(time, mean),
461 static bool select_key(struct perf_kvm_stat *kvm)
465 for (i = 0; keys[i].name; i++) {
466 if (!strcmp(keys[i].name, kvm->sort_key)) {
467 kvm->compare = keys[i].key;
472 pr_err("Unknown compare key:%s\n", kvm->sort_key);
476 static void insert_to_result(struct rb_root *result, struct kvm_event *event,
477 key_cmp_fun bigger, int vcpu)
479 struct rb_node **rb = &result->rb_node;
480 struct rb_node *parent = NULL;
484 p = container_of(*rb, struct kvm_event, rb);
487 if (bigger(event, p, vcpu))
488 rb = &(*rb)->rb_left;
490 rb = &(*rb)->rb_right;
493 rb_link_node(&event->rb, parent, rb);
494 rb_insert_color(&event->rb, result);
498 update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
500 int vcpu = kvm->trace_vcpu;
502 kvm->total_count += get_event_count(event, vcpu);
503 kvm->total_time += get_event_time(event, vcpu);
506 static bool event_is_valid(struct kvm_event *event, int vcpu)
508 return !!get_event_count(event, vcpu);
511 static void sort_result(struct perf_kvm_stat *kvm)
514 int vcpu = kvm->trace_vcpu;
515 struct kvm_event *event;
517 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
518 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
519 if (event_is_valid(event, vcpu)) {
520 update_total_count(kvm, event);
521 insert_to_result(&kvm->result, event,
528 /* returns left most element of result, and erase it */
529 static struct kvm_event *pop_from_result(struct rb_root *result)
531 struct rb_node *node = rb_first(result);
536 rb_erase(node, result);
537 return container_of(node, struct kvm_event, rb);
540 static void print_vcpu_info(struct perf_kvm_stat *kvm)
542 int vcpu = kvm->trace_vcpu;
544 pr_info("Analyze events for ");
546 if (kvm->opts.target.system_wide)
547 pr_info("all VMs, ");
548 else if (kvm->opts.target.pid)
549 pr_info("pid(s) %s, ", kvm->opts.target.pid);
551 pr_info("dazed and confused on what is monitored, ");
554 pr_info("all VCPUs:\n\n");
556 pr_info("VCPU %d:\n\n", vcpu);
559 static void show_timeofday(void)
565 gettimeofday(&tv, NULL);
566 if (localtime_r(&tv.tv_sec, <ime)) {
567 strftime(date, sizeof(date), "%H:%M:%S", <ime);
568 pr_info("%s.%06ld", date, tv.tv_usec);
570 pr_info("00:00:00.000000");
575 static void print_result(struct perf_kvm_stat *kvm)
577 char decode[DECODE_STR_LEN];
578 struct kvm_event *event;
579 int vcpu = kvm->trace_vcpu;
587 print_vcpu_info(kvm);
588 pr_info("%*s ", DECODE_STR_LEN, kvm->events_ops->name);
589 pr_info("%10s ", "Samples");
590 pr_info("%9s ", "Samples%");
592 pr_info("%9s ", "Time%");
593 pr_info("%11s ", "Min Time");
594 pr_info("%11s ", "Max Time");
595 pr_info("%16s ", "Avg time");
598 while ((event = pop_from_result(&kvm->result))) {
599 u64 ecount, etime, max, min;
601 ecount = get_event_count(event, vcpu);
602 etime = get_event_time(event, vcpu);
603 max = get_event_max(event, vcpu);
604 min = get_event_min(event, vcpu);
606 kvm->events_ops->decode_key(kvm, &event->key, decode);
607 pr_info("%*s ", DECODE_STR_LEN, decode);
608 pr_info("%10llu ", (unsigned long long)ecount);
609 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
610 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
611 pr_info("%9.2fus ", (double)min / 1e3);
612 pr_info("%9.2fus ", (double)max / 1e3);
613 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3,
614 kvm_event_rel_stddev(vcpu, event));
618 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
619 kvm->total_count, kvm->total_time / 1e3);
621 if (kvm->lost_events)
622 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
625 #ifdef HAVE_TIMERFD_SUPPORT
626 static int process_lost_event(struct perf_tool *tool,
627 union perf_event *event __maybe_unused,
628 struct perf_sample *sample __maybe_unused,
629 struct machine *machine __maybe_unused)
631 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
638 static bool skip_sample(struct perf_kvm_stat *kvm,
639 struct perf_sample *sample)
641 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
647 static int process_sample_event(struct perf_tool *tool,
648 union perf_event *event,
649 struct perf_sample *sample,
650 struct perf_evsel *evsel,
651 struct machine *machine)
653 struct thread *thread;
654 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
657 if (skip_sample(kvm, sample))
660 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
661 if (thread == NULL) {
662 pr_debug("problem processing %d event, skipping it.\n",
667 if (!handle_kvm_event(kvm, thread, evsel, sample))
673 static int cpu_isa_config(struct perf_kvm_stat *kvm)
675 char buf[64], *cpuid;
679 err = get_cpuid(buf, sizeof(buf));
681 pr_err("Failed to look up CPU type\n");
686 cpuid = kvm->session->header.env.cpuid;
689 pr_err("Failed to look up CPU type\n");
693 err = cpu_isa_init(kvm, cpuid);
695 pr_err("CPU %s is not supported.\n", cpuid);
700 static bool verify_vcpu(int vcpu)
702 if (vcpu != -1 && vcpu < 0) {
703 pr_err("Invalid vcpu:%d.\n", vcpu);
710 #ifdef HAVE_TIMERFD_SUPPORT
711 /* keeping the max events to a modest level to keep
712 * the processing of samples per mmap smooth.
714 #define PERF_KVM__MAX_EVENTS_PER_MMAP 25
716 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
719 union perf_event *event;
720 struct perf_sample sample;
724 *mmap_time = ULLONG_MAX;
725 while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) {
726 err = perf_evlist__parse_sample(kvm->evlist, event, &sample);
728 perf_evlist__mmap_consume(kvm->evlist, idx);
729 pr_err("Failed to parse sample\n");
733 err = perf_session_queue_event(kvm->session, event, &kvm->tool, &sample, 0);
735 * FIXME: Here we can't consume the event, as perf_session_queue_event will
736 * point to it, and it'll get possibly overwritten by the kernel.
738 perf_evlist__mmap_consume(kvm->evlist, idx);
741 pr_err("Failed to enqueue sample: %d\n", err);
745 /* save time stamp of our first sample for this mmap */
747 *mmap_time = sample.time;
749 /* limit events per mmap handled all at once */
751 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
758 static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
760 int i, err, throttled = 0;
762 u64 flush_time = ULLONG_MAX, mmap_time;
764 for (i = 0; i < kvm->evlist->nr_mmaps; i++) {
765 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
769 /* flush time is going to be the minimum of all the individual
770 * mmap times. Essentially, we flush all the samples queued up
771 * from the last pass under our minimal start time -- that leaves
772 * a very small race for samples to come in with a lower timestamp.
773 * The ioctl to return the perf_clock timestamp should close the
776 if (mmap_time < flush_time)
777 flush_time = mmap_time;
780 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
784 /* flush queue after each round in which we processed events */
786 kvm->session->ordered_events.next_flush = flush_time;
787 err = kvm->tool.finished_round(&kvm->tool, NULL, kvm->session);
789 if (kvm->lost_events)
790 pr_info("\nLost events: %" PRIu64 "\n\n",
799 static volatile int done;
801 static void sig_handler(int sig __maybe_unused)
806 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
808 struct itimerspec new_value;
811 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
812 if (kvm->timerfd < 0) {
813 pr_err("timerfd_create failed\n");
817 new_value.it_value.tv_sec = kvm->display_time;
818 new_value.it_value.tv_nsec = 0;
819 new_value.it_interval.tv_sec = kvm->display_time;
820 new_value.it_interval.tv_nsec = 0;
822 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
823 pr_err("timerfd_settime failed: %d\n", errno);
833 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
838 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
843 pr_err("Failed to read timer fd: %d\n", errno);
847 if (rc != sizeof(uint64_t)) {
848 pr_err("Error reading timer fd - invalid size returned\n");
853 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
860 clear_events_cache_stats(kvm->kvm_events_cache);
861 kvm->total_count = 0;
863 kvm->lost_events = 0;
868 static int fd_set_nonblock(int fd)
872 arg = fcntl(fd, F_GETFL);
874 pr_err("Failed to get current flags for fd %d\n", fd);
878 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
879 pr_err("Failed to set non-block option on fd %d\n", fd);
886 static int perf_kvm__handle_stdin(void)
897 static int kvm_events_live_report(struct perf_kvm_stat *kvm)
899 int nr_stdin, ret, err = -EINVAL;
902 /* live flag must be set first */
905 ret = cpu_isa_config(kvm);
909 if (!verify_vcpu(kvm->trace_vcpu) ||
911 !register_kvm_events_ops(kvm)) {
915 set_term_quiet_input(&save);
916 init_kvm_event_record(kvm);
918 signal(SIGINT, sig_handler);
919 signal(SIGTERM, sig_handler);
922 if (perf_kvm__timerfd_create(kvm) < 0) {
927 if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
930 nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
934 if (fd_set_nonblock(fileno(stdin)) != 0)
937 /* everything is good - enable the events and process */
938 perf_evlist__enable(kvm->evlist);
941 struct fdarray *fda = &kvm->evlist->pollfd;
944 rc = perf_kvm__mmap_read(kvm);
948 err = perf_kvm__handle_timerfd(kvm);
952 if (fda->entries[nr_stdin].revents & POLLIN)
953 done = perf_kvm__handle_stdin();
956 err = fdarray__poll(fda, 100);
959 perf_evlist__disable(kvm->evlist);
967 if (kvm->timerfd >= 0)
970 tcsetattr(0, TCSAFLUSH, &save);
974 static int kvm_live_open_events(struct perf_kvm_stat *kvm)
977 struct perf_evsel *pos;
978 struct perf_evlist *evlist = kvm->evlist;
979 char sbuf[STRERR_BUFSIZE];
981 perf_evlist__config(evlist, &kvm->opts);
984 * Note: exclude_{guest,host} do not apply here.
985 * This command processes KVM tracepoints from host only
987 evlist__for_each(evlist, pos) {
988 struct perf_event_attr *attr = &pos->attr;
990 /* make sure these *are* set */
991 perf_evsel__set_sample_bit(pos, TID);
992 perf_evsel__set_sample_bit(pos, TIME);
993 perf_evsel__set_sample_bit(pos, CPU);
994 perf_evsel__set_sample_bit(pos, RAW);
995 /* make sure these are *not*; want as small a sample as possible */
996 perf_evsel__reset_sample_bit(pos, PERIOD);
997 perf_evsel__reset_sample_bit(pos, IP);
998 perf_evsel__reset_sample_bit(pos, CALLCHAIN);
999 perf_evsel__reset_sample_bit(pos, ADDR);
1000 perf_evsel__reset_sample_bit(pos, READ);
1005 attr->sample_period = 1;
1007 attr->watermark = 0;
1008 attr->wakeup_events = 1000;
1010 /* will enable all once we are ready */
1014 err = perf_evlist__open(evlist);
1016 printf("Couldn't create the events: %s\n",
1017 strerror_r(errno, sbuf, sizeof(sbuf)));
1021 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) {
1022 ui__error("Failed to mmap the events: %s\n",
1023 strerror_r(errno, sbuf, sizeof(sbuf)));
1024 perf_evlist__close(evlist);
1035 static int read_events(struct perf_kvm_stat *kvm)
1039 struct perf_tool eops = {
1040 .sample = process_sample_event,
1041 .comm = perf_event__process_comm,
1042 .ordered_events = true,
1044 struct perf_data_file file = {
1045 .path = kvm->file_name,
1046 .mode = PERF_DATA_MODE_READ,
1050 kvm->session = perf_session__new(&file, false, &kvm->tool);
1051 if (!kvm->session) {
1052 pr_err("Initializing perf session failed\n");
1056 symbol__init(&kvm->session->header.env);
1058 if (!perf_session__has_traces(kvm->session, "kvm record"))
1062 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1063 * traced in the old kernel.
1065 ret = cpu_isa_config(kvm);
1069 return perf_session__process_events(kvm->session, &kvm->tool);
1072 static int parse_target_str(struct perf_kvm_stat *kvm)
1074 if (kvm->opts.target.pid) {
1075 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1076 if (kvm->pid_list == NULL) {
1077 pr_err("Error parsing process id string\n");
1085 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1088 int vcpu = kvm->trace_vcpu;
1090 if (parse_target_str(kvm) != 0)
1093 if (!verify_vcpu(vcpu))
1096 if (!select_key(kvm))
1099 if (!register_kvm_events_ops(kvm))
1102 init_kvm_event_record(kvm);
1105 ret = read_events(kvm);
1116 #define STRDUP_FAIL_EXIT(s) \
1125 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1127 unsigned int rec_argc, i, j, events_tp_size;
1128 const char **rec_argv;
1129 const char * const record_args[] = {
1135 const char * const *events_tp;
1138 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1141 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1143 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1145 if (rec_argv == NULL)
1148 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1149 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1151 for (j = 0; j < events_tp_size; j++) {
1152 rec_argv[i++] = "-e";
1153 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1156 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1157 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1159 for (j = 1; j < (unsigned int)argc; j++, i++)
1160 rec_argv[i] = argv[j];
1162 return cmd_record(i, rec_argv, NULL);
1166 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1168 const struct option kvm_events_report_options[] = {
1169 OPT_STRING(0, "event", &kvm->report_event, "report event",
1170 "event for reporting: vmexit, "
1171 "mmio (x86 only), ioport (x86 only)"),
1172 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1173 "vcpu id to report"),
1174 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1175 "key for sorting: sample(sort by samples number)"
1176 " time (sort by avg time)"),
1177 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1178 "analyze events only for given process id(s)"),
1182 const char * const kvm_events_report_usage[] = {
1183 "perf kvm stat report [<options>]",
1188 argc = parse_options(argc, argv,
1189 kvm_events_report_options,
1190 kvm_events_report_usage, 0);
1192 usage_with_options(kvm_events_report_usage,
1193 kvm_events_report_options);
1196 if (!kvm->opts.target.pid)
1197 kvm->opts.target.system_wide = true;
1199 return kvm_events_report_vcpu(kvm);
1202 #ifdef HAVE_TIMERFD_SUPPORT
1203 static struct perf_evlist *kvm_live_event_list(void)
1205 struct perf_evlist *evlist;
1206 char *tp, *name, *sys;
1208 const char * const *events_tp;
1210 evlist = perf_evlist__new();
1214 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1216 tp = strdup(*events_tp);
1220 /* split tracepoint into subsystem and name */
1222 name = strchr(tp, ':');
1224 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1232 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1233 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1245 perf_evlist__delete(evlist);
1252 static int kvm_events_live(struct perf_kvm_stat *kvm,
1253 int argc, const char **argv)
1255 char errbuf[BUFSIZ];
1258 const struct option live_options[] = {
1259 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1260 "record events on existing process id"),
1261 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1262 "number of mmap data pages",
1263 perf_evlist__parse_mmap_pages),
1264 OPT_INCR('v', "verbose", &verbose,
1265 "be more verbose (show counter open errors, etc)"),
1266 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1267 "system-wide collection from all CPUs"),
1268 OPT_UINTEGER('d', "display", &kvm->display_time,
1269 "time in seconds between display updates"),
1270 OPT_STRING(0, "event", &kvm->report_event, "report event",
1271 "event for reporting: vmexit, mmio, ioport"),
1272 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1273 "vcpu id to report"),
1274 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1275 "key for sorting: sample(sort by samples number)"
1276 " time (sort by avg time)"),
1277 OPT_U64(0, "duration", &kvm->duration,
1278 "show events other than"
1279 " HLT (x86 only) or Wait state (s390 only)"
1280 " that take longer than duration usecs"),
1283 const char * const live_usage[] = {
1284 "perf kvm stat live [<options>]",
1287 struct perf_data_file file = {
1288 .mode = PERF_DATA_MODE_WRITE,
1292 /* event handling */
1293 kvm->tool.sample = process_sample_event;
1294 kvm->tool.comm = perf_event__process_comm;
1295 kvm->tool.exit = perf_event__process_exit;
1296 kvm->tool.fork = perf_event__process_fork;
1297 kvm->tool.lost = process_lost_event;
1298 kvm->tool.ordered_events = true;
1299 perf_tool__fill_defaults(&kvm->tool);
1302 kvm->display_time = 1;
1303 kvm->opts.user_interval = 1;
1304 kvm->opts.mmap_pages = 512;
1305 kvm->opts.target.uses_mmap = false;
1306 kvm->opts.target.uid_str = NULL;
1307 kvm->opts.target.uid = UINT_MAX;
1310 disable_buildid_cache();
1313 setup_browser(false);
1316 argc = parse_options(argc, argv, live_options,
1319 usage_with_options(live_usage, live_options);
1322 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1325 * target related setups
1327 err = target__validate(&kvm->opts.target);
1329 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1330 ui__warning("%s", errbuf);
1333 if (target__none(&kvm->opts.target))
1334 kvm->opts.target.system_wide = true;
1338 * generate the event list
1340 kvm->evlist = kvm_live_event_list();
1341 if (kvm->evlist == NULL) {
1346 symbol_conf.nr_events = kvm->evlist->nr_entries;
1348 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1349 usage_with_options(live_usage, live_options);
1354 kvm->session = perf_session__new(&file, false, &kvm->tool);
1355 if (kvm->session == NULL) {
1359 kvm->session->evlist = kvm->evlist;
1360 perf_session__set_id_hdr_size(kvm->session);
1361 ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
1362 machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
1363 kvm->evlist->threads, false);
1364 err = kvm_live_open_events(kvm);
1368 err = kvm_events_live_report(kvm);
1374 perf_session__delete(kvm->session);
1375 kvm->session = NULL;
1377 perf_evlist__delete(kvm->evlist);
1383 static void print_kvm_stat_usage(void)
1385 printf("Usage: perf kvm stat <command>\n\n");
1387 printf("# Available commands:\n");
1388 printf("\trecord: record kvm events\n");
1389 printf("\treport: report statistical data of kvm events\n");
1390 printf("\tlive: live reporting of statistical data of kvm events\n");
1392 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1395 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1397 struct perf_kvm_stat kvm = {
1398 .file_name = file_name,
1401 .report_event = "vmexit",
1402 .sort_key = "sample",
1407 print_kvm_stat_usage();
1411 if (!strncmp(argv[1], "rec", 3))
1412 return kvm_events_record(&kvm, argc - 1, argv + 1);
1414 if (!strncmp(argv[1], "rep", 3))
1415 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1417 #ifdef HAVE_TIMERFD_SUPPORT
1418 if (!strncmp(argv[1], "live", 4))
1419 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1423 return cmd_stat(argc, argv, NULL);
1425 #endif /* HAVE_KVM_STAT_SUPPORT */
1427 static int __cmd_record(const char *file_name, int argc, const char **argv)
1429 int rec_argc, i = 0, j;
1430 const char **rec_argv;
1432 rec_argc = argc + 2;
1433 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1434 rec_argv[i++] = strdup("record");
1435 rec_argv[i++] = strdup("-o");
1436 rec_argv[i++] = strdup(file_name);
1437 for (j = 1; j < argc; j++, i++)
1438 rec_argv[i] = argv[j];
1440 BUG_ON(i != rec_argc);
1442 return cmd_record(i, rec_argv, NULL);
1445 static int __cmd_report(const char *file_name, int argc, const char **argv)
1447 int rec_argc, i = 0, j;
1448 const char **rec_argv;
1450 rec_argc = argc + 2;
1451 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1452 rec_argv[i++] = strdup("report");
1453 rec_argv[i++] = strdup("-i");
1454 rec_argv[i++] = strdup(file_name);
1455 for (j = 1; j < argc; j++, i++)
1456 rec_argv[i] = argv[j];
1458 BUG_ON(i != rec_argc);
1460 return cmd_report(i, rec_argv, NULL);
1464 __cmd_buildid_list(const char *file_name, int argc, const char **argv)
1466 int rec_argc, i = 0, j;
1467 const char **rec_argv;
1469 rec_argc = argc + 2;
1470 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1471 rec_argv[i++] = strdup("buildid-list");
1472 rec_argv[i++] = strdup("-i");
1473 rec_argv[i++] = strdup(file_name);
1474 for (j = 1; j < argc; j++, i++)
1475 rec_argv[i] = argv[j];
1477 BUG_ON(i != rec_argc);
1479 return cmd_buildid_list(i, rec_argv, NULL);
1482 int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
1484 const char *file_name = NULL;
1485 const struct option kvm_options[] = {
1486 OPT_STRING('i', "input", &file_name, "file",
1488 OPT_STRING('o', "output", &file_name, "file",
1489 "Output file name"),
1490 OPT_BOOLEAN(0, "guest", &perf_guest,
1491 "Collect guest os data"),
1492 OPT_BOOLEAN(0, "host", &perf_host,
1493 "Collect host os data"),
1494 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1495 "guest mount directory under which every guest os"
1496 " instance has a subdir"),
1497 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1498 "file", "file saving guest os vmlinux"),
1499 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1500 "file", "file saving guest os /proc/kallsyms"),
1501 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1502 "file", "file saving guest os /proc/modules"),
1503 OPT_INCR('v', "verbose", &verbose,
1504 "be more verbose (show counter open errors, etc)"),
1508 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1509 "buildid-list", "stat", NULL };
1510 const char *kvm_usage[] = { NULL, NULL };
1515 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1516 PARSE_OPT_STOP_AT_NON_OPTION);
1518 usage_with_options(kvm_usage, kvm_options);
1524 file_name = get_filename_for_perf_kvm();
1527 pr_err("Failed to allocate memory for filename\n");
1532 if (!strncmp(argv[0], "rec", 3))
1533 return __cmd_record(file_name, argc, argv);
1534 else if (!strncmp(argv[0], "rep", 3))
1535 return __cmd_report(file_name, argc, argv);
1536 else if (!strncmp(argv[0], "diff", 4))
1537 return cmd_diff(argc, argv, NULL);
1538 else if (!strncmp(argv[0], "top", 3))
1539 return cmd_top(argc, argv, NULL);
1540 else if (!strncmp(argv[0], "buildid-list", 12))
1541 return __cmd_buildid_list(file_name, argc, argv);
1542 #ifdef HAVE_KVM_STAT_SUPPORT
1543 else if (!strncmp(argv[0], "stat", 4))
1544 return kvm_cmd_stat(file_name, argc, argv);
1547 usage_with_options(kvm_usage, kvm_options);