aboutsummaryrefslogtreecommitdiff
path: root/tools/perf/builtin-kvm.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/perf/builtin-kvm.c')
-rw-r--r--tools/perf/builtin-kvm.c1683
1 files changed, 1638 insertions, 45 deletions
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 34d1e853829..0f1e5a2f6ad 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -1,57 +1,1617 @@
#include "builtin.h"
#include "perf.h"
+#include "util/evsel.h"
+#include "util/evlist.h"
#include "util/util.h"
#include "util/cache.h"
#include "util/symbol.h"
#include "util/thread.h"
#include "util/header.h"
#include "util/session.h"
-
+#include "util/intlist.h"
#include "util/parse-options.h"
#include "util/trace-event.h"
-
#include "util/debug.h"
+#include <api/fs/debugfs.h>
+#include "util/tool.h"
+#include "util/stat.h"
+#include "util/top.h"
+#include "util/data.h"
#include <sys/prctl.h>
+#ifdef HAVE_TIMERFD_SUPPORT
+#include <sys/timerfd.h>
+#endif
+#include <termios.h>
#include <semaphore.h>
#include <pthread.h>
#include <math.h>
-static const char *file_name;
-static char name_buffer[256];
+#if defined(__i386__) || defined(__x86_64__)
+#include <asm/svm.h>
+#include <asm/vmx.h>
+#include <asm/kvm.h>
+
+struct event_key {
+ #define INVALID_KEY (~0ULL)
+ u64 key;
+ int info;
+};
+
+struct kvm_event_stats {
+ u64 time;
+ struct stats stats;
+};
+
+struct kvm_event {
+ struct list_head hash_entry;
+ struct rb_node rb;
+
+ struct event_key key;
+
+ struct kvm_event_stats total;
+
+ #define DEFAULT_VCPU_NUM 8
+ int max_vcpu;
+ struct kvm_event_stats *vcpu;
+};
+
+typedef int (*key_cmp_fun)(struct kvm_event*, struct kvm_event*, int);
+
+struct kvm_event_key {
+ const char *name;
+ key_cmp_fun key;
+};
+
+
+struct perf_kvm_stat;
+
+struct kvm_events_ops {
+ bool (*is_begin_event)(struct perf_evsel *evsel,
+ struct perf_sample *sample,
+ struct event_key *key);
+ bool (*is_end_event)(struct perf_evsel *evsel,
+ struct perf_sample *sample, struct event_key *key);
+ void (*decode_key)(struct perf_kvm_stat *kvm, struct event_key *key,
+ char decode[20]);
+ const char *name;
+};
+
+struct exit_reasons_table {
+ unsigned long exit_code;
+ const char *reason;
+};
+
+#define EVENTS_BITS 12
+#define EVENTS_CACHE_SIZE (1UL << EVENTS_BITS)
+
+struct perf_kvm_stat {
+ struct perf_tool tool;
+ struct record_opts opts;
+ struct perf_evlist *evlist;
+ struct perf_session *session;
+
+ const char *file_name;
+ const char *report_event;
+ const char *sort_key;
+ int trace_vcpu;
+
+ struct exit_reasons_table *exit_reasons;
+ int exit_reasons_size;
+ const char *exit_reasons_isa;
+
+ struct kvm_events_ops *events_ops;
+ key_cmp_fun compare;
+ struct list_head kvm_events_cache[EVENTS_CACHE_SIZE];
+
+ u64 total_time;
+ u64 total_count;
+ u64 lost_events;
+ u64 duration;
+
+ const char *pid_str;
+ struct intlist *pid_list;
+
+ struct rb_root result;
+
+ int timerfd;
+ unsigned int display_time;
+ bool live;
+};
+
+
+static void exit_event_get_key(struct perf_evsel *evsel,
+ struct perf_sample *sample,
+ struct event_key *key)
+{
+ key->info = 0;
+ key->key = perf_evsel__intval(evsel, sample, "exit_reason");
+}
+
+static bool kvm_exit_event(struct perf_evsel *evsel)
+{
+ return !strcmp(evsel->name, "kvm:kvm_exit");
+}
+
+static bool exit_event_begin(struct perf_evsel *evsel,
+ struct perf_sample *sample, struct event_key *key)
+{
+ if (kvm_exit_event(evsel)) {
+ exit_event_get_key(evsel, sample, key);
+ return true;
+ }
+
+ return false;
+}
+
+static bool kvm_entry_event(struct perf_evsel *evsel)
+{
+ return !strcmp(evsel->name, "kvm:kvm_entry");
+}
+
+static bool exit_event_end(struct perf_evsel *evsel,
+ struct perf_sample *sample __maybe_unused,
+ struct event_key *key __maybe_unused)
+{
+ return kvm_entry_event(evsel);
+}
+
+static struct exit_reasons_table vmx_exit_reasons[] = {
+ VMX_EXIT_REASONS
+};
+
+static struct exit_reasons_table svm_exit_reasons[] = {
+ SVM_EXIT_REASONS
+};
+
+static const char *get_exit_reason(struct perf_kvm_stat *kvm, u64 exit_code)
+{
+ int i = kvm->exit_reasons_size;
+ struct exit_reasons_table *tbl = kvm->exit_reasons;
+
+ while (i--) {
+ if (tbl->exit_code == exit_code)
+ return tbl->reason;
+ tbl++;
+ }
+
+ pr_err("unknown kvm exit code:%lld on %s\n",
+ (unsigned long long)exit_code, kvm->exit_reasons_isa);
+ return "UNKNOWN";
+}
+
+static void exit_event_decode_key(struct perf_kvm_stat *kvm,
+ struct event_key *key,
+ char decode[20])
+{
+ const char *exit_reason = get_exit_reason(kvm, key->key);
+
+ scnprintf(decode, 20, "%s", exit_reason);
+}
+
+static struct kvm_events_ops exit_events = {
+ .is_begin_event = exit_event_begin,
+ .is_end_event = exit_event_end,
+ .decode_key = exit_event_decode_key,
+ .name = "VM-EXIT"
+};
+
+/*
+ * For the mmio events, we treat:
+ * the time of MMIO write: kvm_mmio(KVM_TRACE_MMIO_WRITE...) -> kvm_entry
+ * the time of MMIO read: kvm_exit -> kvm_mmio(KVM_TRACE_MMIO_READ...).
+ */
+static void mmio_event_get_key(struct perf_evsel *evsel, struct perf_sample *sample,
+ struct event_key *key)
+{
+ key->key = perf_evsel__intval(evsel, sample, "gpa");
+ key->info = perf_evsel__intval(evsel, sample, "type");
+}
+
+#define KVM_TRACE_MMIO_READ_UNSATISFIED 0
+#define KVM_TRACE_MMIO_READ 1
+#define KVM_TRACE_MMIO_WRITE 2
+
+static bool mmio_event_begin(struct perf_evsel *evsel,
+ struct perf_sample *sample, struct event_key *key)
+{
+ /* MMIO read begin event in kernel. */
+ if (kvm_exit_event(evsel))
+ return true;
+
+ /* MMIO write begin event in kernel. */
+ if (!strcmp(evsel->name, "kvm:kvm_mmio") &&
+ perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_WRITE) {
+ mmio_event_get_key(evsel, sample, key);
+ return true;
+ }
+
+ return false;
+}
+
+static bool mmio_event_end(struct perf_evsel *evsel, struct perf_sample *sample,
+ struct event_key *key)
+{
+ /* MMIO write end event in kernel. */
+ if (kvm_entry_event(evsel))
+ return true;
+
+ /* MMIO read end event in kernel.*/
+ if (!strcmp(evsel->name, "kvm:kvm_mmio") &&
+ perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_READ) {
+ mmio_event_get_key(evsel, sample, key);
+ return true;
+ }
+
+ return false;
+}
+
+static void mmio_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
+ struct event_key *key,
+ char decode[20])
+{
+ scnprintf(decode, 20, "%#lx:%s", (unsigned long)key->key,
+ key->info == KVM_TRACE_MMIO_WRITE ? "W" : "R");
+}
+
+static struct kvm_events_ops mmio_events = {
+ .is_begin_event = mmio_event_begin,
+ .is_end_event = mmio_event_end,
+ .decode_key = mmio_event_decode_key,
+ .name = "MMIO Access"
+};
+
+ /* The time of emulation pio access is from kvm_pio to kvm_entry. */
+static void ioport_event_get_key(struct perf_evsel *evsel,
+ struct perf_sample *sample,
+ struct event_key *key)
+{
+ key->key = perf_evsel__intval(evsel, sample, "port");
+ key->info = perf_evsel__intval(evsel, sample, "rw");
+}
+
+static bool ioport_event_begin(struct perf_evsel *evsel,
+ struct perf_sample *sample,
+ struct event_key *key)
+{
+ if (!strcmp(evsel->name, "kvm:kvm_pio")) {
+ ioport_event_get_key(evsel, sample, key);
+ return true;
+ }
+
+ return false;
+}
+
+static bool ioport_event_end(struct perf_evsel *evsel,
+ struct perf_sample *sample __maybe_unused,
+ struct event_key *key __maybe_unused)
+{
+ return kvm_entry_event(evsel);
+}
+
+static void ioport_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
+ struct event_key *key,
+ char decode[20])
+{
+ scnprintf(decode, 20, "%#llx:%s", (unsigned long long)key->key,
+ key->info ? "POUT" : "PIN");
+}
+
+static struct kvm_events_ops ioport_events = {
+ .is_begin_event = ioport_event_begin,
+ .is_end_event = ioport_event_end,
+ .decode_key = ioport_event_decode_key,
+ .name = "IO Port Access"
+};
+
+static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
+{
+ bool ret = true;
+
+ if (!strcmp(kvm->report_event, "vmexit"))
+ kvm->events_ops = &exit_events;
+ else if (!strcmp(kvm->report_event, "mmio"))
+ kvm->events_ops = &mmio_events;
+ else if (!strcmp(kvm->report_event, "ioport"))
+ kvm->events_ops = &ioport_events;
+ else {
+ pr_err("Unknown report event:%s\n", kvm->report_event);
+ ret = false;
+ }
-bool perf_host = 1;
-bool perf_guest;
+ return ret;
+}
-static const char * const kvm_usage[] = {
- "perf kvm [<options>] {top|record|report|diff|buildid-list}",
- NULL
+struct vcpu_event_record {
+ int vcpu_id;
+ u64 start_time;
+ struct kvm_event *last_event;
};
-static const struct option kvm_options[] = {
- OPT_STRING('i', "input", &file_name, "file",
- "Input file name"),
- OPT_STRING('o', "output", &file_name, "file",
- "Output file name"),
- OPT_BOOLEAN(0, "guest", &perf_guest,
- "Collect guest os data"),
- OPT_BOOLEAN(0, "host", &perf_host,
- "Collect guest os data"),
- OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
- "guest mount directory under which every guest os"
- " instance has a subdir"),
- OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
- "file", "file saving guest os vmlinux"),
- OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
- "file", "file saving guest os /proc/kallsyms"),
- OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
- "file", "file saving guest os /proc/modules"),
- OPT_END()
+
+static void init_kvm_event_record(struct perf_kvm_stat *kvm)
+{
+ unsigned int i;
+
+ for (i = 0; i < EVENTS_CACHE_SIZE; i++)
+ INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
+}
+
+#ifdef HAVE_TIMERFD_SUPPORT
+static void clear_events_cache_stats(struct list_head *kvm_events_cache)
+{
+ struct list_head *head;
+ struct kvm_event *event;
+ unsigned int i;
+ int j;
+
+ for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
+ head = &kvm_events_cache[i];
+ list_for_each_entry(event, head, hash_entry) {
+ /* reset stats for event */
+ event->total.time = 0;
+ init_stats(&event->total.stats);
+
+ for (j = 0; j < event->max_vcpu; ++j) {
+ event->vcpu[j].time = 0;
+ init_stats(&event->vcpu[j].stats);
+ }
+ }
+ }
+}
+#endif
+
+static int kvm_events_hash_fn(u64 key)
+{
+ return key & (EVENTS_CACHE_SIZE - 1);
+}
+
+static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
+{
+ int old_max_vcpu = event->max_vcpu;
+ void *prev;
+
+ if (vcpu_id < event->max_vcpu)
+ return true;
+
+ while (event->max_vcpu <= vcpu_id)
+ event->max_vcpu += DEFAULT_VCPU_NUM;
+
+ prev = event->vcpu;
+ event->vcpu = realloc(event->vcpu,
+ event->max_vcpu * sizeof(*event->vcpu));
+ if (!event->vcpu) {
+ free(prev);
+ pr_err("Not enough memory\n");
+ return false;
+ }
+
+ memset(event->vcpu + old_max_vcpu, 0,
+ (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
+ return true;
+}
+
+static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
+{
+ struct kvm_event *event;
+
+ event = zalloc(sizeof(*event));
+ if (!event) {
+ pr_err("Not enough memory\n");
+ return NULL;
+ }
+
+ event->key = *key;
+ init_stats(&event->total.stats);
+ return event;
+}
+
+static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
+ struct event_key *key)
+{
+ struct kvm_event *event;
+ struct list_head *head;
+
+ BUG_ON(key->key == INVALID_KEY);
+
+ head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)];
+ list_for_each_entry(event, head, hash_entry) {
+ if (event->key.key == key->key && event->key.info == key->info)
+ return event;
+ }
+
+ event = kvm_alloc_init_event(key);
+ if (!event)
+ return NULL;
+
+ list_add(&event->hash_entry, head);
+ return event;
+}
+
+static bool handle_begin_event(struct perf_kvm_stat *kvm,
+ struct vcpu_event_record *vcpu_record,
+ struct event_key *key, u64 timestamp)
+{
+ struct kvm_event *event = NULL;
+
+ if (key->key != INVALID_KEY)
+ event = find_create_kvm_event(kvm, key);
+
+ vcpu_record->last_event = event;
+ vcpu_record->start_time = timestamp;
+ return true;
+}
+
+static void
+kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
+{
+ kvm_stats->time += time_diff;
+ update_stats(&kvm_stats->stats, time_diff);
+}
+
+static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
+{
+ struct kvm_event_stats *kvm_stats = &event->total;
+
+ if (vcpu_id != -1)
+ kvm_stats = &event->vcpu[vcpu_id];
+
+ return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
+ avg_stats(&kvm_stats->stats));
+}
+
+static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
+ u64 time_diff)
+{
+ if (vcpu_id == -1) {
+ kvm_update_event_stats(&event->total, time_diff);
+ return true;
+ }
+
+ if (!kvm_event_expand(event, vcpu_id))
+ return false;
+
+ kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
+ return true;
+}
+
+static bool handle_end_event(struct perf_kvm_stat *kvm,
+ struct vcpu_event_record *vcpu_record,
+ struct event_key *key,
+ struct perf_sample *sample)
+{
+ struct kvm_event *event;
+ u64 time_begin, time_diff;
+ int vcpu;
+
+ if (kvm->trace_vcpu == -1)
+ vcpu = -1;
+ else
+ vcpu = vcpu_record->vcpu_id;
+
+ event = vcpu_record->last_event;
+ time_begin = vcpu_record->start_time;
+
+ /* The begin event is not caught. */
+ if (!time_begin)
+ return true;
+
+ /*
+ * In some case, the 'begin event' only records the start timestamp,
+ * the actual event is recognized in the 'end event' (e.g. mmio-event).
+ */
+
+ /* Both begin and end events did not get the key. */
+ if (!event && key->key == INVALID_KEY)
+ return true;
+
+ if (!event)
+ event = find_create_kvm_event(kvm, key);
+
+ if (!event)
+ return false;
+
+ vcpu_record->last_event = NULL;
+ vcpu_record->start_time = 0;
+
+ /* seems to happen once in a while during live mode */
+ if (sample->time < time_begin) {
+ pr_debug("End time before begin time; skipping event.\n");
+ return true;
+ }
+
+ time_diff = sample->time - time_begin;
+
+ if (kvm->duration && time_diff > kvm->duration) {
+ char decode[32];
+
+ kvm->events_ops->decode_key(kvm, &event->key, decode);
+ if (strcmp(decode, "HLT")) {
+ pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n",
+ sample->time, sample->pid, vcpu_record->vcpu_id,
+ decode, time_diff/1000);
+ }
+ }
+
+ return update_kvm_event(event, vcpu, time_diff);
+}
+
+static
+struct vcpu_event_record *per_vcpu_record(struct thread *thread,
+ struct perf_evsel *evsel,
+ struct perf_sample *sample)
+{
+ /* Only kvm_entry records vcpu id. */
+ if (!thread->priv && kvm_entry_event(evsel)) {
+ struct vcpu_event_record *vcpu_record;
+
+ vcpu_record = zalloc(sizeof(*vcpu_record));
+ if (!vcpu_record) {
+ pr_err("%s: Not enough memory\n", __func__);
+ return NULL;
+ }
+
+ vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample, "vcpu_id");
+ thread->priv = vcpu_record;
+ }
+
+ return thread->priv;
+}
+
+static bool handle_kvm_event(struct perf_kvm_stat *kvm,
+ struct thread *thread,
+ struct perf_evsel *evsel,
+ struct perf_sample *sample)
+{
+ struct vcpu_event_record *vcpu_record;
+ struct event_key key = {.key = INVALID_KEY};
+
+ vcpu_record = per_vcpu_record(thread, evsel, sample);
+ if (!vcpu_record)
+ return true;
+
+ /* only process events for vcpus user cares about */
+ if ((kvm->trace_vcpu != -1) &&
+ (kvm->trace_vcpu != vcpu_record->vcpu_id))
+ return true;
+
+ if (kvm->events_ops->is_begin_event(evsel, sample, &key))
+ return handle_begin_event(kvm, vcpu_record, &key, sample->time);
+
+ if (kvm->events_ops->is_end_event(evsel, sample, &key))
+ return handle_end_event(kvm, vcpu_record, &key, sample);
+
+ return true;
+}
+
+#define GET_EVENT_KEY(func, field) \
+static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \
+{ \
+ if (vcpu == -1) \
+ return event->total.field; \
+ \
+ if (vcpu >= event->max_vcpu) \
+ return 0; \
+ \
+ return event->vcpu[vcpu].field; \
+}
+
+#define COMPARE_EVENT_KEY(func, field) \
+GET_EVENT_KEY(func, field) \
+static int compare_kvm_event_ ## func(struct kvm_event *one, \
+ struct kvm_event *two, int vcpu)\
+{ \
+ return get_event_ ##func(one, vcpu) > \
+ get_event_ ##func(two, vcpu); \
+}
+
+GET_EVENT_KEY(time, time);
+COMPARE_EVENT_KEY(count, stats.n);
+COMPARE_EVENT_KEY(mean, stats.mean);
+GET_EVENT_KEY(max, stats.max);
+GET_EVENT_KEY(min, stats.min);
+
+#define DEF_SORT_NAME_KEY(name, compare_key) \
+ { #name, compare_kvm_event_ ## compare_key }
+
+static struct kvm_event_key keys[] = {
+ DEF_SORT_NAME_KEY(sample, count),
+ DEF_SORT_NAME_KEY(time, mean),
+ { NULL, NULL }
};
-static int __cmd_record(int argc, const char **argv)
+static bool select_key(struct perf_kvm_stat *kvm)
+{
+ int i;
+
+ for (i = 0; keys[i].name; i++) {
+ if (!strcmp(keys[i].name, kvm->sort_key)) {
+ kvm->compare = keys[i].key;
+ return true;
+ }
+ }
+
+ pr_err("Unknown compare key:%s\n", kvm->sort_key);
+ return false;
+}
+
+static void insert_to_result(struct rb_root *result, struct kvm_event *event,
+ key_cmp_fun bigger, int vcpu)
+{
+ struct rb_node **rb = &result->rb_node;
+ struct rb_node *parent = NULL;
+ struct kvm_event *p;
+
+ while (*rb) {
+ p = container_of(*rb, struct kvm_event, rb);
+ parent = *rb;
+
+ if (bigger(event, p, vcpu))
+ rb = &(*rb)->rb_left;
+ else
+ rb = &(*rb)->rb_right;
+ }
+
+ rb_link_node(&event->rb, parent, rb);
+ rb_insert_color(&event->rb, result);
+}
+
+static void
+update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event)
+{
+ int vcpu = kvm->trace_vcpu;
+
+ kvm->total_count += get_event_count(event, vcpu);
+ kvm->total_time += get_event_time(event, vcpu);
+}
+
+static bool event_is_valid(struct kvm_event *event, int vcpu)
+{
+ return !!get_event_count(event, vcpu);
+}
+
+static void sort_result(struct perf_kvm_stat *kvm)
+{
+ unsigned int i;
+ int vcpu = kvm->trace_vcpu;
+ struct kvm_event *event;
+
+ for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
+ list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) {
+ if (event_is_valid(event, vcpu)) {
+ update_total_count(kvm, event);
+ insert_to_result(&kvm->result, event,
+ kvm->compare, vcpu);
+ }
+ }
+ }
+}
+
+/* returns left most element of result, and erase it */
+static struct kvm_event *pop_from_result(struct rb_root *result)
+{
+ struct rb_node *node = rb_first(result);
+
+ if (!node)
+ return NULL;
+
+ rb_erase(node, result);
+ return container_of(node, struct kvm_event, rb);
+}
+
+static void print_vcpu_info(struct perf_kvm_stat *kvm)
+{
+ int vcpu = kvm->trace_vcpu;
+
+ pr_info("Analyze events for ");
+
+ if (kvm->live) {
+ if (kvm->opts.target.system_wide)
+ pr_info("all VMs, ");
+ else if (kvm->opts.target.pid)
+ pr_info("pid(s) %s, ", kvm->opts.target.pid);
+ else
+ pr_info("dazed and confused on what is monitored, ");
+ }
+
+ if (vcpu == -1)
+ pr_info("all VCPUs:\n\n");
+ else
+ pr_info("VCPU %d:\n\n", vcpu);
+}
+
+static void show_timeofday(void)
+{
+ char date[64];
+ struct timeval tv;
+ struct tm ltime;
+
+ gettimeofday(&tv, NULL);
+ if (localtime_r(&tv.tv_sec, &ltime)) {
+ strftime(date, sizeof(date), "%H:%M:%S", &ltime);
+ pr_info("%s.%06ld", date, tv.tv_usec);
+ } else
+ pr_info("00:00:00.000000");
+
+ return;
+}
+
+static void print_result(struct perf_kvm_stat *kvm)
+{
+ char decode[20];
+ struct kvm_event *event;
+ int vcpu = kvm->trace_vcpu;
+
+ if (kvm->live) {
+ puts(CONSOLE_CLEAR);
+ show_timeofday();
+ }
+
+ pr_info("\n\n");
+ print_vcpu_info(kvm);
+ pr_info("%20s ", kvm->events_ops->name);
+ pr_info("%10s ", "Samples");
+ pr_info("%9s ", "Samples%");
+
+ pr_info("%9s ", "Time%");
+ pr_info("%10s ", "Min Time");
+ pr_info("%10s ", "Max Time");
+ pr_info("%16s ", "Avg time");
+ pr_info("\n\n");
+
+ while ((event = pop_from_result(&kvm->result))) {
+ u64 ecount, etime, max, min;
+
+ ecount = get_event_count(event, vcpu);
+ etime = get_event_time(event, vcpu);
+ max = get_event_max(event, vcpu);
+ min = get_event_min(event, vcpu);
+
+ kvm->events_ops->decode_key(kvm, &event->key, decode);
+ pr_info("%20s ", decode);
+ pr_info("%10llu ", (unsigned long long)ecount);
+ pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
+ pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
+ pr_info("%8" PRIu64 "us ", min / 1000);
+ pr_info("%8" PRIu64 "us ", max / 1000);
+ pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3,
+ kvm_event_rel_stddev(vcpu, event));
+ pr_info("\n");
+ }
+
+ pr_info("\nTotal Samples:%" PRIu64 ", Total events handled time:%.2fus.\n\n",
+ kvm->total_count, kvm->total_time / 1e3);
+
+ if (kvm->lost_events)
+ pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
+}
+
+#ifdef HAVE_TIMERFD_SUPPORT
+static int process_lost_event(struct perf_tool *tool,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ struct machine *machine __maybe_unused)
+{
+ struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat, tool);
+
+ kvm->lost_events++;
+ return 0;
+}
+#endif
+
+static bool skip_sample(struct perf_kvm_stat *kvm,
+ struct perf_sample *sample)
+{
+ if (kvm->pid_list && intlist__find(kvm->pid_list, sample->pid) == NULL)
+ return true;
+
+ return false;
+}
+
+static int process_sample_event(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine)
+{
+ struct thread *thread;
+ struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
+ tool);
+
+ if (skip_sample(kvm, sample))
+ return 0;
+
+ thread = machine__findnew_thread(machine, sample->pid, sample->tid);
+ if (thread == NULL) {
+ pr_debug("problem processing %d event, skipping it.\n",
+ event->header.type);
+ return -1;
+ }
+
+ if (!handle_kvm_event(kvm, thread, evsel, sample))
+ return -1;
+
+ return 0;
+}
+
+static int cpu_isa_config(struct perf_kvm_stat *kvm)
+{
+ char buf[64], *cpuid;
+ int err, isa;
+
+ if (kvm->live) {
+ err = get_cpuid(buf, sizeof(buf));
+ if (err != 0) {
+ pr_err("Failed to look up CPU type (Intel or AMD)\n");
+ return err;
+ }
+ cpuid = buf;
+ } else
+ cpuid = kvm->session->header.env.cpuid;
+
+ if (strstr(cpuid, "Intel"))
+ isa = 1;
+ else if (strstr(cpuid, "AMD"))
+ isa = 0;
+ else {
+ pr_err("CPU %s is not supported.\n", cpuid);
+ return -ENOTSUP;
+ }
+
+ if (isa == 1) {
+ kvm->exit_reasons = vmx_exit_reasons;
+ kvm->exit_reasons_size = ARRAY_SIZE(vmx_exit_reasons);
+ kvm->exit_reasons_isa = "VMX";
+ }
+
+ return 0;
+}
+
+static bool verify_vcpu(int vcpu)
+{
+ if (vcpu != -1 && vcpu < 0) {
+ pr_err("Invalid vcpu:%d.\n", vcpu);
+ return false;
+ }
+
+ return true;
+}
+
+#ifdef HAVE_TIMERFD_SUPPORT
+/* keeping the max events to a modest level to keep
+ * the processing of samples per mmap smooth.
+ */
+#define PERF_KVM__MAX_EVENTS_PER_MMAP 25
+
+static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
+ u64 *mmap_time)
+{
+ union perf_event *event;
+ struct perf_sample sample;
+ s64 n = 0;
+ int err;
+
+ *mmap_time = ULLONG_MAX;
+ while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) {
+ err = perf_evlist__parse_sample(kvm->evlist, event, &sample);
+ if (err) {
+ perf_evlist__mmap_consume(kvm->evlist, idx);
+ pr_err("Failed to parse sample\n");
+ return -1;
+ }
+
+ err = perf_session_queue_event(kvm->session, event, &sample, 0);
+ /*
+ * FIXME: Here we can't consume the event, as perf_session_queue_event will
+ * point to it, and it'll get possibly overwritten by the kernel.
+ */
+ perf_evlist__mmap_consume(kvm->evlist, idx);
+
+ if (err) {
+ pr_err("Failed to enqueue sample: %d\n", err);
+ return -1;
+ }
+
+ /* save time stamp of our first sample for this mmap */
+ if (n == 0)
+ *mmap_time = sample.time;
+
+ /* limit events per mmap handled all at once */
+ n++;
+ if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
+ break;
+ }
+
+ return n;
+}
+
+static int perf_kvm__mmap_read(struct perf_kvm_stat *kvm)
+{
+ int i, err, throttled = 0;
+ s64 n, ntotal = 0;
+ u64 flush_time = ULLONG_MAX, mmap_time;
+
+ for (i = 0; i < kvm->evlist->nr_mmaps; i++) {
+ n = perf_kvm__mmap_read_idx(kvm, i, &mmap_time);
+ if (n < 0)
+ return -1;
+
+ /* flush time is going to be the minimum of all the individual
+ * mmap times. Essentially, we flush all the samples queued up
+ * from the last pass under our minimal start time -- that leaves
+ * a very small race for samples to come in with a lower timestamp.
+ * The ioctl to return the perf_clock timestamp should close the
+ * race entirely.
+ */
+ if (mmap_time < flush_time)
+ flush_time = mmap_time;
+
+ ntotal += n;
+ if (n == PERF_KVM__MAX_EVENTS_PER_MMAP)
+ throttled = 1;
+ }
+
+ /* flush queue after each round in which we processed events */
+ if (ntotal) {
+ kvm->session->ordered_samples.next_flush = flush_time;
+ err = kvm->tool.finished_round(&kvm->tool, NULL, kvm->session);
+ if (err) {
+ if (kvm->lost_events)
+ pr_info("\nLost events: %" PRIu64 "\n\n",
+ kvm->lost_events);
+ return err;
+ }
+ }
+
+ return throttled;
+}
+
+static volatile int done;
+
+static void sig_handler(int sig __maybe_unused)
+{
+ done = 1;
+}
+
+static int perf_kvm__timerfd_create(struct perf_kvm_stat *kvm)
+{
+ struct itimerspec new_value;
+ int rc = -1;
+
+ kvm->timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
+ if (kvm->timerfd < 0) {
+ pr_err("timerfd_create failed\n");
+ goto out;
+ }
+
+ new_value.it_value.tv_sec = kvm->display_time;
+ new_value.it_value.tv_nsec = 0;
+ new_value.it_interval.tv_sec = kvm->display_time;
+ new_value.it_interval.tv_nsec = 0;
+
+ if (timerfd_settime(kvm->timerfd, 0, &new_value, NULL) != 0) {
+ pr_err("timerfd_settime failed: %d\n", errno);
+ close(kvm->timerfd);
+ goto out;
+ }
+
+ rc = 0;
+out:
+ return rc;
+}
+
+static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
+{
+ uint64_t c;
+ int rc;
+
+ rc = read(kvm->timerfd, &c, sizeof(uint64_t));
+ if (rc < 0) {
+ if (errno == EAGAIN)
+ return 0;
+
+ pr_err("Failed to read timer fd: %d\n", errno);
+ return -1;
+ }
+
+ if (rc != sizeof(uint64_t)) {
+ pr_err("Error reading timer fd - invalid size returned\n");
+ return -1;
+ }
+
+ if (c != 1)
+ pr_debug("Missed timer beats: %" PRIu64 "\n", c-1);
+
+ /* update display */
+ sort_result(kvm);
+ print_result(kvm);
+
+ /* reset counts */
+ clear_events_cache_stats(kvm->kvm_events_cache);
+ kvm->total_count = 0;
+ kvm->total_time = 0;
+ kvm->lost_events = 0;
+
+ return 0;
+}
+
+static int fd_set_nonblock(int fd)
+{
+ long arg = 0;
+
+ arg = fcntl(fd, F_GETFL);
+ if (arg < 0) {
+ pr_err("Failed to get current flags for fd %d\n", fd);
+ return -1;
+ }
+
+ if (fcntl(fd, F_SETFL, arg | O_NONBLOCK) < 0) {
+ pr_err("Failed to set non-block option on fd %d\n", fd);
+ return -1;
+ }
+
+ return 0;
+}
+
+static
+int perf_kvm__handle_stdin(struct termios *tc_now, struct termios *tc_save)
+{
+ int c;
+
+ tcsetattr(0, TCSANOW, tc_now);
+ c = getc(stdin);
+ tcsetattr(0, TCSAFLUSH, tc_save);
+
+ if (c == 'q')
+ return 1;
+
+ return 0;
+}
+
+static int kvm_events_live_report(struct perf_kvm_stat *kvm)
+{
+ struct pollfd *pollfds = NULL;
+ int nr_fds, nr_stdin, ret, err = -EINVAL;
+ struct termios tc, save;
+
+ /* live flag must be set first */
+ kvm->live = true;
+
+ ret = cpu_isa_config(kvm);
+ if (ret < 0)
+ return ret;
+
+ if (!verify_vcpu(kvm->trace_vcpu) ||
+ !select_key(kvm) ||
+ !register_kvm_events_ops(kvm)) {
+ goto out;
+ }
+
+ init_kvm_event_record(kvm);
+
+ tcgetattr(0, &save);
+ tc = save;
+ tc.c_lflag &= ~(ICANON | ECHO);
+ tc.c_cc[VMIN] = 0;
+ tc.c_cc[VTIME] = 0;
+
+ signal(SIGINT, sig_handler);
+ signal(SIGTERM, sig_handler);
+
+ /* copy pollfds -- need to add timerfd and stdin */
+ nr_fds = kvm->evlist->nr_fds;
+ pollfds = zalloc(sizeof(struct pollfd) * (nr_fds + 2));
+ if (!pollfds) {
+ err = -ENOMEM;
+ goto out;
+ }
+ memcpy(pollfds, kvm->evlist->pollfd,
+ sizeof(struct pollfd) * kvm->evlist->nr_fds);
+
+ /* add timer fd */
+ if (perf_kvm__timerfd_create(kvm) < 0) {
+ err = -1;
+ goto out;
+ }
+
+ pollfds[nr_fds].fd = kvm->timerfd;
+ pollfds[nr_fds].events = POLLIN;
+ nr_fds++;
+
+ pollfds[nr_fds].fd = fileno(stdin);
+ pollfds[nr_fds].events = POLLIN;
+ nr_stdin = nr_fds;
+ nr_fds++;
+ if (fd_set_nonblock(fileno(stdin)) != 0)
+ goto out;
+
+ /* everything is good - enable the events and process */
+ perf_evlist__enable(kvm->evlist);
+
+ while (!done) {
+ int rc;
+
+ rc = perf_kvm__mmap_read(kvm);
+ if (rc < 0)
+ break;
+
+ err = perf_kvm__handle_timerfd(kvm);
+ if (err)
+ goto out;
+
+ if (pollfds[nr_stdin].revents & POLLIN)
+ done = perf_kvm__handle_stdin(&tc, &save);
+
+ if (!rc && !done)
+ err = poll(pollfds, nr_fds, 100);
+ }
+
+ perf_evlist__disable(kvm->evlist);
+
+ if (err == 0) {
+ sort_result(kvm);
+ print_result(kvm);
+ }
+
+out:
+ if (kvm->timerfd >= 0)
+ close(kvm->timerfd);
+
+ free(pollfds);
+ return err;
+}
+
+static int kvm_live_open_events(struct perf_kvm_stat *kvm)
+{
+ int err, rc = -1;
+ struct perf_evsel *pos;
+ struct perf_evlist *evlist = kvm->evlist;
+
+ perf_evlist__config(evlist, &kvm->opts);
+
+ /*
+ * Note: exclude_{guest,host} do not apply here.
+ * This command processes KVM tracepoints from host only
+ */
+ evlist__for_each(evlist, pos) {
+ struct perf_event_attr *attr = &pos->attr;
+
+ /* make sure these *are* set */
+ perf_evsel__set_sample_bit(pos, TID);
+ perf_evsel__set_sample_bit(pos, TIME);
+ perf_evsel__set_sample_bit(pos, CPU);
+ perf_evsel__set_sample_bit(pos, RAW);
+ /* make sure these are *not*; want as small a sample as possible */
+ perf_evsel__reset_sample_bit(pos, PERIOD);
+ perf_evsel__reset_sample_bit(pos, IP);
+ perf_evsel__reset_sample_bit(pos, CALLCHAIN);
+ perf_evsel__reset_sample_bit(pos, ADDR);
+ perf_evsel__reset_sample_bit(pos, READ);
+ attr->mmap = 0;
+ attr->comm = 0;
+ attr->task = 0;
+
+ attr->sample_period = 1;
+
+ attr->watermark = 0;
+ attr->wakeup_events = 1000;
+
+ /* will enable all once we are ready */
+ attr->disabled = 1;
+ }
+
+ err = perf_evlist__open(evlist);
+ if (err < 0) {
+ printf("Couldn't create the events: %s\n", strerror(errno));
+ goto out;
+ }
+
+ if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) {
+ ui__error("Failed to mmap the events: %s\n", strerror(errno));
+ perf_evlist__close(evlist);
+ goto out;
+ }
+
+ rc = 0;
+
+out:
+ return rc;
+}
+#endif
+
+static int read_events(struct perf_kvm_stat *kvm)
+{
+ int ret;
+
+ struct perf_tool eops = {
+ .sample = process_sample_event,
+ .comm = perf_event__process_comm,
+ .ordered_samples = true,
+ };
+ struct perf_data_file file = {
+ .path = kvm->file_name,
+ .mode = PERF_DATA_MODE_READ,
+ };
+
+ kvm->tool = eops;
+ kvm->session = perf_session__new(&file, false, &kvm->tool);
+ if (!kvm->session) {
+ pr_err("Initializing perf session failed\n");
+ return -EINVAL;
+ }
+
+ if (!perf_session__has_traces(kvm->session, "kvm record"))
+ return -EINVAL;
+
+ /*
+ * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
+ * traced in the old kernel.
+ */
+ ret = cpu_isa_config(kvm);
+ if (ret < 0)
+ return ret;
+
+ return perf_session__process_events(kvm->session, &kvm->tool);
+}
+
+static int parse_target_str(struct perf_kvm_stat *kvm)
+{
+ if (kvm->pid_str) {
+ kvm->pid_list = intlist__new(kvm->pid_str);
+ if (kvm->pid_list == NULL) {
+ pr_err("Error parsing process id string\n");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
+{
+ int ret = -EINVAL;
+ int vcpu = kvm->trace_vcpu;
+
+ if (parse_target_str(kvm) != 0)
+ goto exit;
+
+ if (!verify_vcpu(vcpu))
+ goto exit;
+
+ if (!select_key(kvm))
+ goto exit;
+
+ if (!register_kvm_events_ops(kvm))
+ goto exit;
+
+ init_kvm_event_record(kvm);
+ setup_pager();
+
+ ret = read_events(kvm);
+ if (ret)
+ goto exit;
+
+ sort_result(kvm);
+ print_result(kvm);
+
+exit:
+ return ret;
+}
+
+static const char * const kvm_events_tp[] = {
+ "kvm:kvm_entry",
+ "kvm:kvm_exit",
+ "kvm:kvm_mmio",
+ "kvm:kvm_pio",
+};
+
+#define STRDUP_FAIL_EXIT(s) \
+ ({ char *_p; \
+ _p = strdup(s); \
+ if (!_p) \
+ return -ENOMEM; \
+ _p; \
+ })
+
+static int
+kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
+{
+ unsigned int rec_argc, i, j;
+ const char **rec_argv;
+ const char * const record_args[] = {
+ "record",
+ "-R",
+ "-m", "1024",
+ "-c", "1",
+ };
+
+ rec_argc = ARRAY_SIZE(record_args) + argc + 2 +
+ 2 * ARRAY_SIZE(kvm_events_tp);
+ rec_argv = calloc(rec_argc + 1, sizeof(char *));
+
+ if (rec_argv == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(record_args); i++)
+ rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
+
+ for (j = 0; j < ARRAY_SIZE(kvm_events_tp); j++) {
+ rec_argv[i++] = "-e";
+ rec_argv[i++] = STRDUP_FAIL_EXIT(kvm_events_tp[j]);
+ }
+
+ rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
+ rec_argv[i++] = STRDUP_FAIL_EXIT(kvm->file_name);
+
+ for (j = 1; j < (unsigned int)argc; j++, i++)
+ rec_argv[i] = argv[j];
+
+ return cmd_record(i, rec_argv, NULL);
+}
+
+static int
+kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
+{
+ const struct option kvm_events_report_options[] = {
+ OPT_STRING(0, "event", &kvm->report_event, "report event",
+ "event for reporting: vmexit, mmio, ioport"),
+ OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
+ "vcpu id to report"),
+ OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
+ "key for sorting: sample(sort by samples number)"
+ " time (sort by avg time)"),
+ OPT_STRING('p', "pid", &kvm->pid_str, "pid",
+ "analyze events only for given process id(s)"),
+ OPT_END()
+ };
+
+ const char * const kvm_events_report_usage[] = {
+ "perf kvm stat report [<options>]",
+ NULL
+ };
+
+ symbol__init();
+
+ if (argc) {
+ argc = parse_options(argc, argv,
+ kvm_events_report_options,
+ kvm_events_report_usage, 0);
+ if (argc)
+ usage_with_options(kvm_events_report_usage,
+ kvm_events_report_options);
+ }
+
+ return kvm_events_report_vcpu(kvm);
+}
+
+#ifdef HAVE_TIMERFD_SUPPORT
+static struct perf_evlist *kvm_live_event_list(void)
+{
+ struct perf_evlist *evlist;
+ char *tp, *name, *sys;
+ unsigned int j;
+ int err = -1;
+
+ evlist = perf_evlist__new();
+ if (evlist == NULL)
+ return NULL;
+
+ for (j = 0; j < ARRAY_SIZE(kvm_events_tp); j++) {
+
+ tp = strdup(kvm_events_tp[j]);
+ if (tp == NULL)
+ goto out;
+
+ /* split tracepoint into subsystem and name */
+ sys = tp;
+ name = strchr(tp, ':');
+ if (name == NULL) {
+ pr_err("Error parsing %s tracepoint: subsystem delimiter not found\n",
+ kvm_events_tp[j]);
+ free(tp);
+ goto out;
+ }
+ *name = '\0';
+ name++;
+
+ if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
+ pr_err("Failed to add %s tracepoint to the list\n", kvm_events_tp[j]);
+ free(tp);
+ goto out;
+ }
+
+ free(tp);
+ }
+
+ err = 0;
+
+out:
+ if (err) {
+ perf_evlist__delete(evlist);
+ evlist = NULL;
+ }
+
+ return evlist;
+}
+
+static int kvm_events_live(struct perf_kvm_stat *kvm,
+ int argc, const char **argv)
+{
+ char errbuf[BUFSIZ];
+ int err;
+
+ const struct option live_options[] = {
+ OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
+ "record events on existing process id"),
+ OPT_CALLBACK('m', "mmap-pages", &kvm->opts.mmap_pages, "pages",
+ "number of mmap data pages",
+ perf_evlist__parse_mmap_pages),
+ OPT_INCR('v', "verbose", &verbose,
+ "be more verbose (show counter open errors, etc)"),
+ OPT_BOOLEAN('a', "all-cpus", &kvm->opts.target.system_wide,
+ "system-wide collection from all CPUs"),
+ OPT_UINTEGER('d', "display", &kvm->display_time,
+ "time in seconds between display updates"),
+ OPT_STRING(0, "event", &kvm->report_event, "report event",
+ "event for reporting: vmexit, mmio, ioport"),
+ OPT_INTEGER(0, "vcpu", &kvm->trace_vcpu,
+ "vcpu id to report"),
+ OPT_STRING('k', "key", &kvm->sort_key, "sort-key",
+ "key for sorting: sample(sort by samples number)"
+ " time (sort by avg time)"),
+ OPT_U64(0, "duration", &kvm->duration,
+ "show events other than HALT that take longer than duration usecs"),
+ OPT_END()
+ };
+ const char * const live_usage[] = {
+ "perf kvm stat live [<options>]",
+ NULL
+ };
+ struct perf_data_file file = {
+ .mode = PERF_DATA_MODE_WRITE,
+ };
+
+
+ /* event handling */
+ kvm->tool.sample = process_sample_event;
+ kvm->tool.comm = perf_event__process_comm;
+ kvm->tool.exit = perf_event__process_exit;
+ kvm->tool.fork = perf_event__process_fork;
+ kvm->tool.lost = process_lost_event;
+ kvm->tool.ordered_samples = true;
+ perf_tool__fill_defaults(&kvm->tool);
+
+ /* set defaults */
+ kvm->display_time = 1;
+ kvm->opts.user_interval = 1;
+ kvm->opts.mmap_pages = 512;
+ kvm->opts.target.uses_mmap = false;
+ kvm->opts.target.uid_str = NULL;
+ kvm->opts.target.uid = UINT_MAX;
+
+ symbol__init();
+ disable_buildid_cache();
+
+ use_browser = 0;
+ setup_browser(false);
+
+ if (argc) {
+ argc = parse_options(argc, argv, live_options,
+ live_usage, 0);
+ if (argc)
+ usage_with_options(live_usage, live_options);
+ }
+
+ kvm->duration *= NSEC_PER_USEC; /* convert usec to nsec */
+
+ /*
+ * target related setups
+ */
+ err = target__validate(&kvm->opts.target);
+ if (err) {
+ target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
+ ui__warning("%s", errbuf);
+ }
+
+ if (target__none(&kvm->opts.target))
+ kvm->opts.target.system_wide = true;
+
+
+ /*
+ * generate the event list
+ */
+ kvm->evlist = kvm_live_event_list();
+ if (kvm->evlist == NULL) {
+ err = -1;
+ goto out;
+ }
+
+ symbol_conf.nr_events = kvm->evlist->nr_entries;
+
+ if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
+ usage_with_options(live_usage, live_options);
+
+ /*
+ * perf session
+ */
+ kvm->session = perf_session__new(&file, false, &kvm->tool);
+ if (kvm->session == NULL) {
+ err = -ENOMEM;
+ goto out;
+ }
+ kvm->session->evlist = kvm->evlist;
+ perf_session__set_id_hdr_size(kvm->session);
+ machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
+ kvm->evlist->threads, false);
+ err = kvm_live_open_events(kvm);
+ if (err)
+ goto out;
+
+ err = kvm_events_live_report(kvm);
+
+out:
+ exit_browser(0);
+
+ if (kvm->session)
+ perf_session__delete(kvm->session);
+ kvm->session = NULL;
+ if (kvm->evlist)
+ perf_evlist__delete(kvm->evlist);
+
+ return err;
+}
+#endif
+
+static void print_kvm_stat_usage(void)
+{
+ printf("Usage: perf kvm stat <command>\n\n");
+
+ printf("# Available commands:\n");
+ printf("\trecord: record kvm events\n");
+ printf("\treport: report statistical data of kvm events\n");
+ printf("\tlive: live reporting of statistical data of kvm events\n");
+
+ printf("\nOtherwise, it is the alias of 'perf stat':\n");
+}
+
+static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
+{
+ struct perf_kvm_stat kvm = {
+ .file_name = file_name,
+
+ .trace_vcpu = -1,
+ .report_event = "vmexit",
+ .sort_key = "sample",
+
+ .exit_reasons = svm_exit_reasons,
+ .exit_reasons_size = ARRAY_SIZE(svm_exit_reasons),
+ .exit_reasons_isa = "SVM",
+ };
+
+ if (argc == 1) {
+ print_kvm_stat_usage();
+ goto perf_stat;
+ }
+
+ if (!strncmp(argv[1], "rec", 3))
+ return kvm_events_record(&kvm, argc - 1, argv + 1);
+
+ if (!strncmp(argv[1], "rep", 3))
+ return kvm_events_report(&kvm, argc - 1 , argv + 1);
+
+#ifdef HAVE_TIMERFD_SUPPORT
+ if (!strncmp(argv[1], "live", 4))
+ return kvm_events_live(&kvm, argc - 1 , argv + 1);
+#endif
+
+perf_stat:
+ return cmd_stat(argc, argv, NULL);
+}
+#endif
+
+static int __cmd_record(const char *file_name, int argc, const char **argv)
{
int rec_argc, i = 0, j;
const char **rec_argv;
@@ -69,7 +1629,7 @@ static int __cmd_record(int argc, const char **argv)
return cmd_record(i, rec_argv, NULL);
}
-static int __cmd_report(int argc, const char **argv)
+static int __cmd_report(const char *file_name, int argc, const char **argv)
{
int rec_argc, i = 0, j;
const char **rec_argv;
@@ -87,7 +1647,8 @@ static int __cmd_report(int argc, const char **argv)
return cmd_report(i, rec_argv, NULL);
}
-static int __cmd_buildid_list(int argc, const char **argv)
+static int
+__cmd_buildid_list(const char *file_name, int argc, const char **argv)
{
int rec_argc, i = 0, j;
const char **rec_argv;
@@ -105,12 +1666,41 @@ static int __cmd_buildid_list(int argc, const char **argv)
return cmd_buildid_list(i, rec_argv, NULL);
}
-int cmd_kvm(int argc, const char **argv, const char *prefix __used)
+int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
{
- perf_host = perf_guest = 0;
+ const char *file_name = NULL;
+ const struct option kvm_options[] = {
+ OPT_STRING('i', "input", &file_name, "file",
+ "Input file name"),
+ OPT_STRING('o', "output", &file_name, "file",
+ "Output file name"),
+ OPT_BOOLEAN(0, "guest", &perf_guest,
+ "Collect guest os data"),
+ OPT_BOOLEAN(0, "host", &perf_host,
+ "Collect host os data"),
+ OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory",
+ "guest mount directory under which every guest os"
+ " instance has a subdir"),
+ OPT_STRING(0, "guestvmlinux", &symbol_conf.default_guest_vmlinux_name,
+ "file", "file saving guest os vmlinux"),
+ OPT_STRING(0, "guestkallsyms", &symbol_conf.default_guest_kallsyms,
+ "file", "file saving guest os /proc/kallsyms"),
+ OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
+ "file", "file saving guest os /proc/modules"),
+ OPT_INCR('v', "verbose", &verbose,
+ "be more verbose (show counter open errors, etc)"),
+ OPT_END()
+ };
+
+ const char *const kvm_subcommands[] = { "top", "record", "report", "diff",
+ "buildid-list", "stat", NULL };
+ const char *kvm_usage[] = { NULL, NULL };
- argc = parse_options(argc, argv, kvm_options, kvm_usage,
- PARSE_OPT_STOP_AT_NON_OPTION);
+ perf_host = 0;
+ perf_guest = 1;
+
+ argc = parse_options_subcommand(argc, argv, kvm_options, kvm_subcommands, kvm_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc)
usage_with_options(kvm_usage, kvm_options);
@@ -118,25 +1708,28 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __used)
perf_guest = 1;
if (!file_name) {
- if (perf_host && !perf_guest)
- sprintf(name_buffer, "perf.data.host");
- else if (!perf_host && perf_guest)
- sprintf(name_buffer, "perf.data.guest");
- else
- sprintf(name_buffer, "perf.data.kvm");
- file_name = name_buffer;
+ file_name = get_filename_for_perf_kvm();
+
+ if (!file_name) {
+ pr_err("Failed to allocate memory for filename\n");
+ return -ENOMEM;
+ }
}
if (!strncmp(argv[0], "rec", 3))
- return __cmd_record(argc, argv);
+ return __cmd_record(file_name, argc, argv);
else if (!strncmp(argv[0], "rep", 3))
- return __cmd_report(argc, argv);
+ return __cmd_report(file_name, argc, argv);
else if (!strncmp(argv[0], "diff", 4))
return cmd_diff(argc, argv, NULL);
else if (!strncmp(argv[0], "top", 3))
return cmd_top(argc, argv, NULL);
else if (!strncmp(argv[0], "buildid-list", 12))
- return __cmd_buildid_list(argc, argv);
+ return __cmd_buildid_list(file_name, argc, argv);
+#if defined(__i386__) || defined(__x86_64__)
+ else if (!strncmp(argv[0], "stat", 4))
+ return kvm_cmd_stat(file_name, argc, argv);
+#endif
else
usage_with_options(kvm_usage, kvm_options);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 12:58:11 +0000