1 // SPDX-License-Identifier: GPL-2.0
5 #include "util/build-id.h"
6 #include "util/evsel.h"
7 #include "util/evlist.h"
9 #include "util/symbol.h"
10 #include "util/thread.h"
11 #include "util/header.h"
12 #include "util/session.h"
13 #include "util/intlist.h"
14 #include <subcmd/pager.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/synthetic-events.h"
22 #include "util/data.h"
23 #include "util/ordered-events.h"
24 #include "util/kvm-stat.h"
27 #include <sys/prctl.h>
28 #ifdef HAVE_TIMERFD_SUPPORT
29 #include <sys/timerfd.h>
32 #include <sys/types.h>
36 #include <linux/err.h>
37 #include <linux/kernel.h>
38 #include <linux/string.h>
39 #include <linux/time64.h>
40 #include <linux/zalloc.h>
45 #include <semaphore.h>
49 static const char *get_filename_for_perf_kvm(void)
53 if (perf_host && !perf_guest)
54 filename = strdup("perf.data.host");
55 else if (!perf_host && perf_guest)
56 filename = strdup("perf.data.guest");
58 filename = strdup("perf.data.kvm");
63 #ifdef HAVE_KVM_STAT_SUPPORT
65 void exit_event_get_key(struct evsel *evsel,
66 struct perf_sample *sample,
67 struct event_key *key)
70 key->key = perf_evsel__intval(evsel, sample, kvm_exit_reason);
73 bool kvm_exit_event(struct evsel *evsel)
75 return !strcmp(evsel->name, kvm_exit_trace);
78 bool exit_event_begin(struct evsel *evsel,
79 struct perf_sample *sample, struct event_key *key)
81 if (kvm_exit_event(evsel)) {
82 exit_event_get_key(evsel, sample, key);
89 bool kvm_entry_event(struct evsel *evsel)
91 return !strcmp(evsel->name, kvm_entry_trace);
94 bool exit_event_end(struct evsel *evsel,
95 struct perf_sample *sample __maybe_unused,
96 struct event_key *key __maybe_unused)
98 return kvm_entry_event(evsel);
101 static const char *get_exit_reason(struct perf_kvm_stat *kvm,
102 struct exit_reasons_table *tbl,
105 while (tbl->reason != NULL) {
106 if (tbl->exit_code == exit_code)
111 pr_err("unknown kvm exit code:%lld on %s\n",
112 (unsigned long long)exit_code, kvm->exit_reasons_isa);
116 void exit_event_decode_key(struct perf_kvm_stat *kvm,
117 struct event_key *key,
120 const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
123 scnprintf(decode, decode_str_len, "%s", exit_reason);
126 static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
128 struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
130 for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) {
131 if (!strcmp(events_ops->name, kvm->report_event)) {
132 kvm->events_ops = events_ops->ops;
140 struct vcpu_event_record {
143 struct kvm_event *last_event;
147 static void init_kvm_event_record(struct perf_kvm_stat *kvm)
151 for (i = 0; i < EVENTS_CACHE_SIZE; i++)
152 INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
155 #ifdef HAVE_TIMERFD_SUPPORT
156 static void clear_events_cache_stats(struct list_head *kvm_events_cache)
158 struct list_head *head;
159 struct kvm_event *event;
163 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
164 head = &kvm_events_cache[i];
165 list_for_each_entry(event, head, hash_entry) {
166 /* reset stats for event */
167 event->total.time = 0;
168 init_stats(&event->total.stats);
170 for (j = 0; j < event->max_vcpu; ++j) {
171 event->vcpu[j].time = 0;
172 init_stats(&event->vcpu[j].stats);
179 static int kvm_events_hash_fn(u64 key)
181 return key & (EVENTS_CACHE_SIZE - 1);
184 static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
186 int old_max_vcpu = event->max_vcpu;
189 if (vcpu_id < event->max_vcpu)
192 while (event->max_vcpu <= vcpu_id)
193 event->max_vcpu += DEFAULT_VCPU_NUM;
196 event->vcpu = realloc(event->vcpu,
197 event->max_vcpu * sizeof(*event->vcpu));
200 pr_err("Not enough memory\n");
204 memset(event->vcpu + old_max_vcpu, 0,
205 (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
209 static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
211 struct kvm_event *event;
213 event = zalloc(sizeof(*event));
215 pr_err("Not enough memory\n");
220 init_stats(&event->total.stats);
224 static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
225 struct event_key *key)
227 struct kvm_event *event;
228 struct list_head *head;
230 BUG_ON(key->key == INVALID_KEY);
232 head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
233 list_for_each_entry(event, head, hash_entry) {
234 if (event->key.key == key->key && event->key.info == key->info)
238 event = kvm_alloc_init_event(key);
242 list_add(&event->hash_entry, head);
246 static bool handle_begin_event(struct perf_kvm_stat *kvm,
247 struct vcpu_event_record *vcpu_record,
248 struct event_key *key, u64 timestamp)
250 struct kvm_event *event = NULL;
252 if (key->key != INVALID_KEY)
253 event = find_create_kvm_event(kvm, key);
255 vcpu_record->last_event = event;
256 vcpu_record->start_time = timestamp;
261 kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
263 kvm_stats->time += time_diff;
264 update_stats(&kvm_stats->stats, time_diff);
267 static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
269 struct kvm_event_stats *kvm_stats = &event->total;
272 kvm_stats = &event->vcpu[vcpu_id];
274 return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
275 avg_stats(&kvm_stats->stats));
278 static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
282 kvm_update_event_stats(&event->total, time_diff);
286 if (!kvm_event_expand(event, vcpu_id))
289 kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
293 static bool is_child_event(struct perf_kvm_stat *kvm,
295 struct perf_sample *sample,
296 struct event_key *key)
298 struct child_event_ops *child_ops;
300 child_ops = kvm->events_ops->child_ops;
305 for (; child_ops->name; child_ops++) {
306 if (!strcmp(evsel->name, child_ops->name)) {
307 child_ops->get_key(evsel, sample, key);
315 static bool handle_child_event(struct perf_kvm_stat *kvm,
316 struct vcpu_event_record *vcpu_record,
317 struct event_key *key,
318 struct perf_sample *sample __maybe_unused)
320 struct kvm_event *event = NULL;
322 if (key->key != INVALID_KEY)
323 event = find_create_kvm_event(kvm, key);
325 vcpu_record->last_event = event;
330 static bool skip_event(const char *event)
332 const char * const *skip_events;
334 for (skip_events = kvm_skip_events; *skip_events; skip_events++)
335 if (!strcmp(event, *skip_events))
341 static bool handle_end_event(struct perf_kvm_stat *kvm,
342 struct vcpu_event_record *vcpu_record,
343 struct event_key *key,
344 struct perf_sample *sample)
346 struct kvm_event *event;
347 u64 time_begin, time_diff;
350 if (kvm->trace_vcpu == -1)
353 vcpu = vcpu_record->vcpu_id;
355 event = vcpu_record->last_event;
356 time_begin = vcpu_record->start_time;
358 /* The begin event is not caught. */
363 * In some case, the 'begin event' only records the start timestamp,
364 * the actual event is recognized in the 'end event' (e.g. mmio-event).
367 /* Both begin and end events did not get the key. */
368 if (!event && key->key == INVALID_KEY)
372 event = find_create_kvm_event(kvm, key);
377 vcpu_record->last_event = NULL;
378 vcpu_record->start_time = 0;
380 /* seems to happen once in a while during live mode */
381 if (sample->time < time_begin) {
382 pr_debug("End time before begin time; skipping event.\n");
386 time_diff = sample->time - time_begin;
388 if (kvm->duration && time_diff > kvm->duration) {
389 char decode[decode_str_len];
391 kvm->events_ops->decode_key(kvm, &event->key, decode);
392 if (!skip_event(decode)) {
393 pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
394 sample->time, sample->pid, vcpu_record->vcpu_id,
395 decode, time_diff / NSEC_PER_USEC);
399 return update_kvm_event(event, vcpu, time_diff);
403 struct vcpu_event_record *per_vcpu_record(struct thread *thread,
405 struct perf_sample *sample)
407 /* Only kvm_entry records vcpu id. */
408 if (!thread__priv(thread) && kvm_entry_event(evsel)) {
409 struct vcpu_event_record *vcpu_record;
411 vcpu_record = zalloc(sizeof(*vcpu_record));
413 pr_err("%s: Not enough memory\n", __func__);
417 vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample,
419 thread__set_priv(thread, vcpu_record);
422 return thread__priv(thread);
425 static bool handle_kvm_event(struct perf_kvm_stat *kvm,
426 struct thread *thread,
428 struct perf_sample *sample)
430 struct vcpu_event_record *vcpu_record;
431 struct event_key key = { .key = INVALID_KEY,
432 .exit_reasons = kvm->exit_reasons };
434 vcpu_record = per_vcpu_record(thread, evsel, sample);
438 /* only process events for vcpus user cares about */
439 if ((kvm->trace_vcpu != -1) &&
440 (kvm->trace_vcpu != vcpu_record->vcpu_id))
443 if (kvm->events_ops->is_begin_event(evsel, sample, &key))
444 return handle_begin_event(kvm, vcpu_record, &key, sample->time);
446 if (is_child_event(kvm, evsel, sample, &key))
447 return handle_child_event(kvm, vcpu_record, &key, sample);
449 if (kvm->events_ops->is_end_event(evsel, sample, &key))
450 return handle_end_event(kvm, vcpu_record, &key, sample);
455 #define GET_EVENT_KEY(func, field) \
456 static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
459 return event->total.field; \
461 if (vcpu >= event->max_vcpu) \
464 return event->vcpu[vcpu].field; \
467 #define COMPARE_EVENT_KEY(func, field) \
468 GET_EVENT_KEY(func, field) \
469 static int compare_kvm_event_ ## func(struct kvm_event *one, \
470 struct kvm_event *two, int vcpu)\
472 return get_event_ ##func(one, vcpu) > \
473 get_event_ ##func(two, vcpu); \
476 GET_EVENT_KEY(time, time);
477 COMPARE_EVENT_KEY(count, stats.n);
478 COMPARE_EVENT_KEY(mean, stats.mean);
479 GET_EVENT_KEY(max, stats.max);
480 GET_EVENT_KEY(min, stats.min);
482 #define DEF_SORT_NAME_KEY(name, compare_key) \
483 { #name, compare_kvm_event_ ## compare_key }
485 static struct kvm_event_key keys[] = {
486 DEF_SORT_NAME_KEY(sample, count),
487 DEF_SORT_NAME_KEY(time, mean),
491 static bool select_key(struct perf_kvm_stat *kvm)
495 for (i = 0; keys[i].name; i++) {
496 if (!strcmp(keys[i].name, kvm->sort_key)) {
497 kvm->compare = keys[i].key;
502 pr_err("Unknown compare key:%s\n", kvm->sort_key);
506 static void insert_to_result(struct rb_root *result, struct kvm_event *event,
507 key_cmp_fun bigger, int vcpu)
509 struct rb_node **rb = &result->rb_node;
510 struct rb_node *parent = NULL;
514 p = container_of(*rb, struct kvm_event, rb);
517 if (bigger(event, p, vcpu))
518 rb = &(*rb)->rb_left;
520 rb = &(*rb)->rb_right;
523 rb_link_node(&event->rb, parent, rb);
524 rb_insert_color(&event->rb, result);
528 update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
530 int vcpu = kvm->trace_vcpu;
532 kvm->total_count += get_event_count(event, vcpu);
533 kvm->total_time += get_event_time(event, vcpu);
536 static bool event_is_valid(struct kvm_event *event, int vcpu)
538 return !!get_event_count(event, vcpu);
541 static void sort_result(struct perf_kvm_stat *kvm)
544 int vcpu = kvm->trace_vcpu;
545 struct kvm_event *event;
547 for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
548 list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
549 if (event_is_valid(event, vcpu)) {
550 update_total_count(kvm, event);
551 insert_to_result(&kvm->result, event,
558 /* returns left most element of result, and erase it */
559 static struct kvm_event *pop_from_result(struct rb_root *result)
561 struct rb_node *node = rb_first(result);
566 rb_erase(node, result);
567 return container_of(node, struct kvm_event, rb);
570 static void print_vcpu_info(struct perf_kvm_stat *kvm)
572 int vcpu = kvm->trace_vcpu;
574 pr_info("Analyze events for ");
576 if (kvm->opts.target.system_wide)
577 pr_info("all VMs, ");
578 else if (kvm->opts.target.pid)
579 pr_info("pid(s) %s, ", kvm->opts.target.pid);
581 pr_info("dazed and confused on what is monitored, ");
584 pr_info("all VCPUs:\n\n");
586 pr_info("VCPU %d:\n\n", vcpu);
589 static void show_timeofday(void)
595 gettimeofday(&tv, NULL);
596 if (localtime_r(&tv.tv_sec, <ime)) {
597 strftime(date, sizeof(date), "%H:%M:%S", <ime);
598 pr_info("%s.%06ld", date, tv.tv_usec);
600 pr_info("00:00:00.000000");
605 static void print_result(struct perf_kvm_stat *kvm)
607 char decode[decode_str_len];
608 struct kvm_event *event;
609 int vcpu = kvm->trace_vcpu;
617 print_vcpu_info(kvm);
618 pr_info("%*s ", decode_str_len, kvm->events_ops->name);
619 pr_info("%10s ", "Samples");
620 pr_info("%9s ", "Samples%");
622 pr_info("%9s ", "Time%");
623 pr_info("%11s ", "Min Time");
624 pr_info("%11s ", "Max Time");
625 pr_info("%16s ", "Avg time");
628 while ((event = pop_from_result(&kvm->result))) {
629 u64 ecount, etime, max, min;
631 ecount = get_event_count(event, vcpu);
632 etime = get_event_time(event, vcpu);
633 max = get_event_max(event, vcpu);
634 min = get_event_min(event, vcpu);
636 kvm->events_ops->decode_key(kvm, &event->key, decode);
637 pr_info("%*s ", decode_str_len, decode);
638 pr_info("%10llu ", (unsigned long long)ecount);
639 pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
640 pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
641 pr_info("%9.2fus ", (double)min / NSEC_PER_USEC);
642 pr_info("%9.2fus ", (double)max / NSEC_PER_USEC);
643 pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount / NSEC_PER_USEC,
644 kvm_event_rel_stddev(vcpu, event));
648 pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
649 kvm->total_count, kvm->total_time / (double)NSEC_PER_USEC);
651 if (kvm->lost_events)
652 pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
655 #ifdef HAVE_TIMERFD_SUPPORT
656 static int process_lost_event(struct perf_tool *tool,
657 union perf_event *event __maybe_unused,
658 struct perf_sample *sample __maybe_unused,
659 struct machine *machine __maybe_unused)
661 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
668 static bool skip_sample(struct perf_kvm_stat *kvm,
669 struct perf_sample *sample)
671 if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
677 static int process_sample_event(struct perf_tool *tool,
678 union perf_event *event,
679 struct perf_sample *sample,
681 struct machine *machine)
684 struct thread *thread;
685 struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
688 if (skip_sample(kvm, sample))
691 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
692 if (thread == NULL) {
693 pr_debug("problem processing %d event, skipping it.\n",
698 if (!handle_kvm_event(kvm, thread, evsel, sample))
705 static int cpu_isa_config(struct perf_kvm_stat *kvm)
707 char buf[64], *cpuid;
711 err = get_cpuid(buf, sizeof(buf));
713 pr_err("Failed to look up CPU type\n");
718 cpuid = kvm->session->header.env.cpuid;
721 pr_err("Failed to look up CPU type\n");
725 err = cpu_isa_init(kvm, cpuid);
727 pr_err("CPU %s is not supported.\n", cpuid);
732 static bool verify_vcpu(int vcpu)
734 if (vcpu != -1 && vcpu < 0) {
735 pr_err("Invalid vcpu:%d.\n", vcpu);
742 #ifdef HAVE_TIMERFD_SUPPORT
743 /* keeping the max events to a modest level to keep
744 * the processing of samples per mmap smooth.
746 #define PERF_KVM__MAX_EVENTS_PER_MMAP 25
748 static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
751 struct evlist *evlist = kvm->evlist;
752 union perf_event *event;
758 *mmap_time = ULLONG_MAX;
759 md = &evlist->mmap[idx];
760 err = perf_mmap__read_init(md);
762 return (err == -EAGAIN) ? 0 : -1;
764 while ((event = perf_mmap__read_event(md)) != NULL) {
765 err = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp);
767 perf_mmap__consume(md);
768 pr_err("Failed to parse sample\n");
772 err = perf_session__queue_event(kvm->session, event, timestamp, 0);
774 * FIXME: Here we can't consume the event, as perf_session__queue_event will
775 * point to it, and it'll get possibly overwritten by the kernel.
777 perf_mmap__consume(md);
780 pr_err("Failed to enqueue sample: %d\n", err);
784 /* save time stamp of our first sample for this mmap */
786 *mmap_time = timestamp;
788 /* limit events per mmap handled all at once */
790 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
794 perf_mmap__read_done(md);
798 static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
800 int i, err, throttled = 0;
802 u64 flush_time = ULLONG_MAX, mmap_time;
804 for (i = 0; i < kvm->evlist->nr_mmaps; i++) {
805 n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
809 /* flush time is going to be the minimum of all the individual
810 * mmap times. Essentially, we flush all the samples queued up
811 * from the last pass under our minimal start time -- that leaves
812 * a very small race for samples to come in with a lower timestamp.
813 * The ioctl to return the perf_clock timestamp should close the
816 if (mmap_time < flush_time)
817 flush_time = mmap_time;
820 if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
824 /* flush queue after each round in which we processed events */
826 struct ordered_events *oe = &kvm->session->ordered_events;
828 oe->next_flush = flush_time;
829 err = ordered_events__flush(oe, OE_FLUSH__ROUND);
831 if (kvm->lost_events)
832 pr_info("\nLost events: %" PRIu64 "\n\n",
841 static volatile int done;
843 static void sig_handler(int sig __maybe_unused)
848 static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
850 struct itimerspec new_value;
853 kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
854 if (kvm->timerfd < 0) {
855 pr_err("timerfd_create failed\n");
859 new_value.it_value.tv_sec = kvm->display_time;
860 new_value.it_value.tv_nsec = 0;
861 new_value.it_interval.tv_sec = kvm->display_time;
862 new_value.it_interval.tv_nsec = 0;
864 if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
865 pr_err("timerfd_settime failed: %d\n", errno);
875 static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
880 rc = read(kvm->timerfd, &c, sizeof(uint64_t));
885 pr_err("Failed to read timer fd: %d\n", errno);
889 if (rc != sizeof(uint64_t)) {
890 pr_err("Error reading timer fd - invalid size returned\n");
895 pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
902 clear_events_cache_stats(kvm->kvm_events_cache);
903 kvm->total_count = 0;
905 kvm->lost_events = 0;
910 static int fd_set_nonblock(int fd)
914 arg = fcntl(fd, F_GETFL);
916 pr_err("Failed to get current flags for fd %d\n", fd);
920 if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
921 pr_err("Failed to set non-block option on fd %d\n", fd);
928 static int perf_kvm__handle_stdin(void)
939 static int kvm_events_live_report(struct perf_kvm_stat *kvm)
941 int nr_stdin, ret, err = -EINVAL;
944 /* live flag must be set first */
947 ret = cpu_isa_config(kvm);
951 if (!verify_vcpu(kvm->trace_vcpu) ||
953 !register_kvm_events_ops(kvm)) {
957 set_term_quiet_input(&save);
958 init_kvm_event_record(kvm);
960 signal(SIGINT, sig_handler);
961 signal(SIGTERM, sig_handler);
964 if (perf_kvm__timerfd_create(kvm) < 0) {
969 if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
972 nr_stdin = perf_evlist__add_pollfd(kvm->evlist, fileno(stdin));
976 if (fd_set_nonblock(fileno(stdin)) != 0)
979 /* everything is good - enable the events and process */
980 evlist__enable(kvm->evlist);
983 struct fdarray *fda = &kvm->evlist->pollfd;
986 rc = perf_kvm__mmap_read(kvm);
990 err = perf_kvm__handle_timerfd(kvm);
994 if (fda->entries[nr_stdin].revents & POLLIN)
995 done = perf_kvm__handle_stdin();
998 err = fdarray__poll(fda, 100);
1001 evlist__disable(kvm->evlist);
1009 if (kvm->timerfd >= 0)
1010 close(kvm->timerfd);
1012 tcsetattr(0, TCSAFLUSH, &save);
1016 static int kvm_live_open_events(struct perf_kvm_stat *kvm)
1020 struct evlist *evlist = kvm->evlist;
1021 char sbuf[STRERR_BUFSIZE];
1023 perf_evlist__config(evlist, &kvm->opts, NULL);
1026 * Note: exclude_{guest,host} do not apply here.
1027 * This command processes KVM tracepoints from host only
1029 evlist__for_each_entry(evlist, pos) {
1030 struct perf_event_attr *attr = &pos->core.attr;
1032 /* make sure these *are* set */
1033 perf_evsel__set_sample_bit(pos, TID);
1034 perf_evsel__set_sample_bit(pos, TIME);
1035 perf_evsel__set_sample_bit(pos, CPU);
1036 perf_evsel__set_sample_bit(pos, RAW);
1037 /* make sure these are *not*; want as small a sample as possible */
1038 perf_evsel__reset_sample_bit(pos, PERIOD);
1039 perf_evsel__reset_sample_bit(pos, IP);
1040 perf_evsel__reset_sample_bit(pos, CALLCHAIN);
1041 perf_evsel__reset_sample_bit(pos, ADDR);
1042 perf_evsel__reset_sample_bit(pos, READ);
1047 attr->sample_period = 1;
1049 attr->watermark = 0;
1050 attr->wakeup_events = 1000;
1052 /* will enable all once we are ready */
1056 err = evlist__open(evlist);
1058 printf("Couldn't create the events: %s\n",
1059 str_error_r(errno, sbuf, sizeof(sbuf)));
1063 if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages) < 0) {
1064 ui__error("Failed to mmap the events: %s\n",
1065 str_error_r(errno, sbuf, sizeof(sbuf)));
1066 evlist__close(evlist);
1077 static int read_events(struct perf_kvm_stat *kvm)
1081 struct perf_tool eops = {
1082 .sample = process_sample_event,
1083 .comm = perf_event__process_comm,
1084 .namespaces = perf_event__process_namespaces,
1085 .ordered_events = true,
1087 struct perf_data file = {
1088 .path = kvm->file_name,
1089 .mode = PERF_DATA_MODE_READ,
1090 .force = kvm->force,
1094 kvm->session = perf_session__new(&file, false, &kvm->tool);
1095 if (IS_ERR(kvm->session)) {
1096 pr_err("Initializing perf session failed\n");
1097 return PTR_ERR(kvm->session);
1100 symbol__init(&kvm->session->header.env);
1102 if (!perf_session__has_traces(kvm->session, "kvm record")) {
1108 * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
1109 * traced in the old kernel.
1111 ret = cpu_isa_config(kvm);
1115 ret = perf_session__process_events(kvm->session);
1118 perf_session__delete(kvm->session);
1122 static int parse_target_str(struct perf_kvm_stat *kvm)
1124 if (kvm->opts.target.pid) {
1125 kvm->pid_list = intlist__new(kvm->opts.target.pid);
1126 if (kvm->pid_list == NULL) {
1127 pr_err("Error parsing process id string\n");
1135 static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
1138 int vcpu = kvm->trace_vcpu;
1140 if (parse_target_str(kvm) != 0)
1143 if (!verify_vcpu(vcpu))
1146 if (!select_key(kvm))
1149 if (!register_kvm_events_ops(kvm))
1152 init_kvm_event_record(kvm);
1155 ret = read_events(kvm);
1166 #define STRDUP_FAIL_EXIT(s) \
1174 int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused)
1180 kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
1182 unsigned int rec_argc, i, j, events_tp_size;
1183 const char **rec_argv;
1184 const char * const record_args[] = {
1190 const char * const kvm_stat_record_usage[] = {
1191 "perf kvm stat record [<options>]",
1194 const char * const *events_tp;
1198 ret = setup_kvm_events_tp(kvm);
1200 pr_err("Unable to setup the kvm tracepoints\n");
1204 for (events_tp = kvm_events_tp; *events_tp; events_tp++)
1207 rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
1209 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1211 if (rec_argv == NULL)
1214 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1215 rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
1217 for (j = 0; j < events_tp_size; j++) {
1218 rec_argv[i++] = "-e";
1219 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
1222 rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
1223 rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
1225 for (j = 1; j < (unsigned int)argc; j++, i++)
1226 rec_argv[i] = argv[j];
1228 set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
1229 set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
1230 set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
1232 set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
1233 set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
1234 set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
1235 set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
1236 set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
1237 set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
1238 set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
1239 set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
1240 set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
1241 set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
1242 set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
1243 set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
1244 set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
1245 set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
1246 set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
1248 record_usage = kvm_stat_record_usage;
1249 return cmd_record(i, rec_argv);
1253 kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
1255 const struct option kvm_events_report_options[] = {
1256 OPT_STRING(0, "event", &kvm->report_event, "report event",
1257 "event for reporting: vmexit, "
1258 "mmio (x86 only), ioport (x86 only)"),
1259 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1260 "vcpu id to report"),
1261 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1262 "key for sorting: sample(sort by samples number)"
1263 " time (sort by avg time)"),
1264 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1265 "analyze events only for given process id(s)"),
1266 OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
1270 const char * const kvm_events_report_usage[] = {
1271 "perf kvm stat report [<options>]",
1276 argc = parse_options(argc, argv,
1277 kvm_events_report_options,
1278 kvm_events_report_usage, 0);
1280 usage_with_options(kvm_events_report_usage,
1281 kvm_events_report_options);
1284 if (!kvm->opts.target.pid)
1285 kvm->opts.target.system_wide = true;
1287 return kvm_events_report_vcpu(kvm);
1290 #ifdef HAVE_TIMERFD_SUPPORT
1291 static struct evlist *kvm_live_event_list(void)
1293 struct evlist *evlist;
1294 char *tp, *name, *sys;
1296 const char * const *events_tp;
1298 evlist = evlist__new();
1302 for (events_tp = kvm_events_tp; *events_tp; events_tp++) {
1304 tp = strdup(*events_tp);
1308 /* split tracepoint into subsystem and name */
1310 name = strchr(tp, ':');
1312 pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
1320 if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
1321 pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
1333 evlist__delete(evlist);
1340 static int kvm_events_live(struct perf_kvm_stat *kvm,
1341 int argc, const char **argv)
1343 char errbuf[BUFSIZ];
1346 const struct option live_options[] = {
1347 OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
1348 "record events on existing process id"),
1349 OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
1350 "number of mmap data pages",
1351 perf_evlist__parse_mmap_pages),
1352 OPT_INCR('v', "verbose", &verbose,
1353 "be more verbose (show counter open errors, etc)"),
1354 OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
1355 "system-wide collection from all CPUs"),
1356 OPT_UINTEGER('d', "display", &kvm->display_time,
1357 "time in seconds between display updates"),
1358 OPT_STRING(0, "event", &kvm->report_event, "report event",
1359 "event for reporting: "
1360 "vmexit, mmio (x86 only), ioport (x86 only)"),
1361 OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
1362 "vcpu id to report"),
1363 OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
1364 "key for sorting: sample(sort by samples number)"
1365 " time (sort by avg time)"),
1366 OPT_U64(0, "duration", &kvm->duration,
1367 "show events other than"
1368 " HLT (x86 only) or Wait state (s390 only)"
1369 " that take longer than duration usecs"),
1370 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
1371 "per thread proc mmap processing timeout in ms"),
1374 const char * const live_usage[] = {
1375 "perf kvm stat live [<options>]",
1378 struct perf_data data = {
1379 .mode = PERF_DATA_MODE_WRITE,
1383 /* event handling */
1384 kvm->tool.sample = process_sample_event;
1385 kvm->tool.comm = perf_event__process_comm;
1386 kvm->tool.exit = perf_event__process_exit;
1387 kvm->tool.fork = perf_event__process_fork;
1388 kvm->tool.lost = process_lost_event;
1389 kvm->tool.namespaces = perf_event__process_namespaces;
1390 kvm->tool.ordered_events = true;
1391 perf_tool__fill_defaults(&kvm->tool);
1394 kvm->display_time = 1;
1395 kvm->opts.user_interval = 1;
1396 kvm->opts.mmap_pages = 512;
1397 kvm->opts.target.uses_mmap = false;
1398 kvm->opts.target.uid_str = NULL;
1399 kvm->opts.target.uid = UINT_MAX;
1402 disable_buildid_cache();
1407 argc = parse_options(argc, argv, live_options,
1410 usage_with_options(live_usage, live_options);
1413 kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
1416 * target related setups
1418 err = target__validate(&kvm->opts.target);
1420 target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
1421 ui__warning("%s", errbuf);
1424 if (target__none(&kvm->opts.target))
1425 kvm->opts.target.system_wide = true;
1429 * generate the event list
1431 err = setup_kvm_events_tp(kvm);
1433 pr_err("Unable to setup the kvm tracepoints\n");
1437 kvm->evlist = kvm_live_event_list();
1438 if (kvm->evlist == NULL) {
1443 if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
1444 usage_with_options(live_usage, live_options);
1449 kvm->session = perf_session__new(&data, false, &kvm->tool);
1450 if (IS_ERR(kvm->session)) {
1451 err = PTR_ERR(kvm->session);
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->core.threads, false, 1);
1459 err = kvm_live_open_events(kvm);
1463 err = kvm_events_live_report(kvm);
1466 perf_session__delete(kvm->session);
1467 kvm->session = NULL;
1468 evlist__delete(kvm->evlist);
1474 static void print_kvm_stat_usage(void)
1476 printf("Usage: perf kvm stat <command>\n\n");
1478 printf("# Available commands:\n");
1479 printf("\trecord: record kvm events\n");
1480 printf("\treport: report statistical data of kvm events\n");
1481 printf("\tlive: live reporting of statistical data of kvm events\n");
1483 printf("\nOtherwise, it is the alias of 'perf stat':\n");
1486 static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
1488 struct perf_kvm_stat kvm = {
1489 .file_name = file_name,
1492 .report_event = "vmexit",
1493 .sort_key = "sample",
1498 print_kvm_stat_usage();
1502 if (!strncmp(argv[1], "rec", 3))
1503 return kvm_events_record(&kvm, argc - 1, argv + 1);
1505 if (!strncmp(argv[1], "rep", 3))
1506 return kvm_events_report(&kvm, argc - 1 , argv + 1);
1508 #ifdef HAVE_TIMERFD_SUPPORT
1509 if (!strncmp(argv[1], "live", 4))
1510 return kvm_events_live(&kvm, argc - 1 , argv + 1);
1514 return cmd_stat(argc, argv);
1516 #endif /* HAVE_KVM_STAT_SUPPORT */
1518 int __weak kvm_add_default_arch_event(int *argc __maybe_unused,
1519 const char **argv __maybe_unused)
1524 static int __cmd_record(const char *file_name, int argc, const char **argv)
1526 int rec_argc, i = 0, j, ret;
1527 const char **rec_argv;
1529 ret = kvm_add_default_arch_event(&argc, argv);
1533 rec_argc = argc + 2;
1534 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1535 rec_argv[i++] = strdup("record");
1536 rec_argv[i++] = strdup("-o");
1537 rec_argv[i++] = strdup(file_name);
1538 for (j = 1; j < argc; j++, i++)
1539 rec_argv[i] = argv[j];
1541 BUG_ON(i != rec_argc);
1543 return cmd_record(i, rec_argv);
1546 static int __cmd_report(const char *file_name, int argc, const char **argv)
1548 int rec_argc, i = 0, j;
1549 const char **rec_argv;
1551 rec_argc = argc + 2;
1552 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1553 rec_argv[i++] = strdup("report");
1554 rec_argv[i++] = strdup("-i");
1555 rec_argv[i++] = strdup(file_name);
1556 for (j = 1; j < argc; j++, i++)
1557 rec_argv[i] = argv[j];
1559 BUG_ON(i != rec_argc);
1561 return cmd_report(i, rec_argv);
1565 __cmd_buildid_list(const char *file_name, int argc, const char **argv)
1567 int rec_argc, i = 0, j;
1568 const char **rec_argv;
1570 rec_argc = argc + 2;
1571 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1572 rec_argv[i++] = strdup("buildid-list");
1573 rec_argv[i++] = strdup("-i");
1574 rec_argv[i++] = strdup(file_name);
1575 for (j = 1; j < argc; j++, i++)
1576 rec_argv[i] = argv[j];
1578 BUG_ON(i != rec_argc);
1580 return cmd_buildid_list(i, rec_argv);
1583 int cmd_kvm(int argc, const char **argv)
1585 const char *file_name = NULL;
1586 const struct option kvm_options[] = {
1587 OPT_STRING('i', "input", &file_name, "file",
1589 OPT_STRING('o', "output", &file_name, "file",
1590 "Output file name"),
1591 OPT_BOOLEAN(0, "guest", &perf_guest,
1592 "Collect guest os data"),
1593 OPT_BOOLEAN(0, "host", &perf_host,
1594 "Collect host os data"),
1595 OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
1596 "guest mount directory under which every guest os"
1597 " instance has a subdir"),
1598 OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
1599 "file", "file saving guest os vmlinux"),
1600 OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
1601 "file", "file saving guest os /proc/kallsyms"),
1602 OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
1603 "file", "file saving guest os /proc/modules"),
1604 OPT_INCR('v', "verbose", &verbose,
1605 "be more verbose (show counter open errors, etc)"),
1609 const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
1610 "buildid-list", "stat", NULL };
1611 const char *kvm_usage[] = { NULL, NULL };
1616 argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
1617 PARSE_OPT_STOP_AT_NON_OPTION);
1619 usage_with_options(kvm_usage, kvm_options);
1625 file_name = get_filename_for_perf_kvm();
1628 pr_err("Failed to allocate memory for filename\n");
1633 if (!strncmp(argv[0], "rec", 3))
1634 return __cmd_record(file_name, argc, argv);
1635 else if (!strncmp(argv[0], "rep", 3))
1636 return __cmd_report(file_name, argc, argv);
1637 else if (!strncmp(argv[0], "diff", 4))
1638 return cmd_diff(argc, argv);
1639 else if (!strncmp(argv[0], "top", 3))
1640 return cmd_top(argc, argv);
1641 else if (!strncmp(argv[0], "buildid-list", 12))
1642 return __cmd_buildid_list(file_name, argc, argv);
1643 #ifdef HAVE_KVM_STAT_SUPPORT
1644 else if (!strncmp(argv[0], "stat", 4))
1645 return kvm_cmd_stat(file_name, argc, argv);
1648 usage_with_options(kvm_usage, kvm_options);