1 files changed, 724 insertions, 244 deletions

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 95a77058023e..67fd2b006b0b 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -23,7 +23,11 @@
 #include "util/data.h"
 #include "util/ordered-events.h"
 #include "util/kvm-stat.h"
+#include "util/util.h"
+#include "ui/browsers/hists.h"
+#include "ui/progress.h"
 #include "ui/ui.h"
+#include "util/string2.h"
 
 #include <sys/prctl.h>
 #ifdef HAVE_TIMERFD_SUPPORT
@@ -48,83 +52,569 @@
 #include <math.h>
 #include <perf/mmap.h>
 
-static const char *get_filename_for_perf_kvm(void)
+#if defined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
+#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 int64_t cmp_event_ ## func(struct kvm_event *one,		\
+			      struct kvm_event *two, int vcpu)		\
+{									\
+	return get_event_ ##func(one, vcpu) -				\
+	       get_event_ ##func(two, vcpu);				\
+}
+
+COMPARE_EVENT_KEY(time, time);
+COMPARE_EVENT_KEY(max, stats.max);
+COMPARE_EVENT_KEY(min, stats.min);
+COMPARE_EVENT_KEY(count, stats.n);
+COMPARE_EVENT_KEY(mean, stats.mean);
+
+struct kvm_hists {
+	struct hists		hists;
+	struct perf_hpp_list	list;
+};
+
+struct kvm_dimension {
+	const char *name;
+	const char *header;
+	int width;
+	int64_t (*cmp)(struct perf_hpp_fmt *fmt, struct hist_entry *left,
+		       struct hist_entry *right);
+	int (*entry)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+		     struct hist_entry *he);
+};
+
+struct kvm_fmt {
+	struct perf_hpp_fmt	fmt;
+	struct kvm_dimension	*dim;
+};
+
+static struct kvm_hists kvm_hists;
+
+static int64_t ev_name_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
+			   struct hist_entry *left,
+			   struct hist_entry *right)
 {
-	const char *filename;
+	/* Return opposite number for sorting in alphabetical order */
+	return -strcmp(left->kvm_info->name, right->kvm_info->name);
+}
 
-	if (perf_host && !perf_guest)
-		filename = strdup("perf.data.host");
-	else if (!perf_host && perf_guest)
-		filename = strdup("perf.data.guest");
-	else
-		filename = strdup("perf.data.kvm");
+static int fmt_width(struct perf_hpp_fmt *fmt,
+		     struct perf_hpp *hpp __maybe_unused,
+		     struct hists *hists __maybe_unused);
 
-	return filename;
+static int ev_name_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+			 struct hist_entry *he)
+{
+	int width = fmt_width(fmt, hpp, he->hists);
+
+	return scnprintf(hpp->buf, hpp->size, "%*s", width, he->kvm_info->name);
 }
 
-#ifdef HAVE_KVM_STAT_SUPPORT
+static struct kvm_dimension dim_event = {
+	.header		= "Event name",
+	.name		= "ev_name",
+	.cmp		= ev_name_cmp,
+	.entry		= ev_name_entry,
+	.width		= 40,
+};
 
-void exit_event_get_key(struct evsel *evsel,
-			struct perf_sample *sample,
-			struct event_key *key)
+#define EV_METRIC_CMP(metric)						\
+static int64_t ev_cmp_##metric(struct perf_hpp_fmt *fmt __maybe_unused,	\
+			       struct hist_entry *left,			\
+			       struct hist_entry *right)		\
+{									\
+	struct kvm_event *event_left;					\
+	struct kvm_event *event_right;					\
+	struct perf_kvm_stat *perf_kvm;					\
+									\
+	event_left  = container_of(left, struct kvm_event, he);		\
+	event_right = container_of(right, struct kvm_event, he);	\
+									\
+	perf_kvm = event_left->perf_kvm;				\
+	return cmp_event_##metric(event_left, event_right,		\
+				  perf_kvm->trace_vcpu);		\
+}
+
+EV_METRIC_CMP(time)
+EV_METRIC_CMP(count)
+EV_METRIC_CMP(max)
+EV_METRIC_CMP(min)
+EV_METRIC_CMP(mean)
+
+#define EV_METRIC_ENTRY(metric)						\
+static int ev_entry_##metric(struct perf_hpp_fmt *fmt,			\
+			     struct perf_hpp *hpp,			\
+			     struct hist_entry *he)			\
+{									\
+	struct kvm_event *event;					\
+	int width = fmt_width(fmt, hpp, he->hists);			\
+	struct perf_kvm_stat *perf_kvm;					\
+									\
+	event = container_of(he, struct kvm_event, he);			\
+	perf_kvm = event->perf_kvm;					\
+	return scnprintf(hpp->buf, hpp->size, "%*lu", width,		\
+		get_event_##metric(event, perf_kvm->trace_vcpu));	\
+}
+
+EV_METRIC_ENTRY(time)
+EV_METRIC_ENTRY(count)
+EV_METRIC_ENTRY(max)
+EV_METRIC_ENTRY(min)
+
+static struct kvm_dimension dim_time = {
+	.header		= "Time (ns)",
+	.name		= "time",
+	.cmp		= ev_cmp_time,
+	.entry		= ev_entry_time,
+	.width		= 12,
+};
+
+static struct kvm_dimension dim_count = {
+	.header		= "Samples",
+	.name		= "sample",
+	.cmp		= ev_cmp_count,
+	.entry		= ev_entry_count,
+	.width		= 12,
+};
+
+static struct kvm_dimension dim_max_time = {
+	.header		= "Max Time (ns)",
+	.name		= "max_t",
+	.cmp		= ev_cmp_max,
+	.entry		= ev_entry_max,
+	.width		= 14,
+};
+
+static struct kvm_dimension dim_min_time = {
+	.header		= "Min Time (ns)",
+	.name		= "min_t",
+	.cmp		= ev_cmp_min,
+	.entry		= ev_entry_min,
+	.width		= 14,
+};
+
+static int ev_entry_mean(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+			 struct hist_entry *he)
+{
+	struct kvm_event *event;
+	int width = fmt_width(fmt, hpp, he->hists);
+	struct perf_kvm_stat *perf_kvm;
+
+	event = container_of(he, struct kvm_event, he);
+	perf_kvm = event->perf_kvm;
+	return scnprintf(hpp->buf, hpp->size, "%*lu", width,
+			 get_event_mean(event, perf_kvm->trace_vcpu));
+}
+
+static struct kvm_dimension dim_mean_time = {
+	.header		= "Mean Time (ns)",
+	.name		= "mean_t",
+	.cmp		= ev_cmp_mean,
+	.entry		= ev_entry_mean,
+	.width		= 14,
+};
+
+#define PERC_STR(__s, __v)				\
+({							\
+	scnprintf(__s, sizeof(__s), "%.2F%%", __v);	\
+	__s;						\
+})
+
+static double percent(u64 st, u64 tot)
+{
+	return tot ? 100. * (double) st / (double) tot : 0;
+}
+
+#define EV_METRIC_PERCENT(metric)					\
+static int ev_percent_##metric(struct hist_entry *he)			\
+{									\
+	struct kvm_event *event;					\
+	struct perf_kvm_stat *perf_kvm;					\
+									\
+	event = container_of(he, struct kvm_event, he);			\
+	perf_kvm = event->perf_kvm;					\
+									\
+	return percent(get_event_##metric(event, perf_kvm->trace_vcpu),	\
+		       perf_kvm->total_##metric);			\
+}
+
+EV_METRIC_PERCENT(time)
+EV_METRIC_PERCENT(count)
+
+static int ev_entry_time_precent(struct perf_hpp_fmt *fmt,
+				 struct perf_hpp *hpp,
+				 struct hist_entry *he)
 {
-	key->info = 0;
-	key->key  = evsel__intval(evsel, sample, kvm_exit_reason);
+	int width = fmt_width(fmt, hpp, he->hists);
+	double per;
+	char buf[10];
+
+	per = ev_percent_time(he);
+	return scnprintf(hpp->buf, hpp->size, "%*s", width, PERC_STR(buf, per));
 }
 
-bool kvm_exit_event(struct evsel *evsel)
+static int64_t
+ev_cmp_time_precent(struct perf_hpp_fmt *fmt __maybe_unused,
+		    struct hist_entry *left, struct hist_entry *right)
 {
-	return !strcmp(evsel->name, kvm_exit_trace);
+	double per_left;
+	double per_right;
+
+	per_left  = ev_percent_time(left);
+	per_right = ev_percent_time(right);
+
+	return per_left - per_right;
 }
 
-bool exit_event_begin(struct evsel *evsel,
-		      struct perf_sample *sample, struct event_key *key)
+static struct kvm_dimension dim_time_percent = {
+	.header		= "Time%",
+	.name		= "percent_time",
+	.cmp		= ev_cmp_time_precent,
+	.entry		= ev_entry_time_precent,
+	.width		= 12,
+};
+
+static int ev_entry_count_precent(struct perf_hpp_fmt *fmt,
+				  struct perf_hpp *hpp,
+				  struct hist_entry *he)
 {
-	if (kvm_exit_event(evsel)) {
-		exit_event_get_key(evsel, sample, key);
-		return true;
+	int width = fmt_width(fmt, hpp, he->hists);
+	double per;
+	char buf[10];
+
+	per = ev_percent_count(he);
+	return scnprintf(hpp->buf, hpp->size, "%*s", width, PERC_STR(buf, per));
+}
+
+static int64_t
+ev_cmp_count_precent(struct perf_hpp_fmt *fmt __maybe_unused,
+		     struct hist_entry *left, struct hist_entry *right)
+{
+	double per_left;
+	double per_right;
+
+	per_left  = ev_percent_count(left);
+	per_right = ev_percent_count(right);
+
+	return per_left - per_right;
+}
+
+static struct kvm_dimension dim_count_percent = {
+	.header		= "Sample%",
+	.name		= "percent_sample",
+	.cmp		= ev_cmp_count_precent,
+	.entry		= ev_entry_count_precent,
+	.width		= 12,
+};
+
+static struct kvm_dimension *dimensions[] = {
+	&dim_event,
+	&dim_time,
+	&dim_time_percent,
+	&dim_count,
+	&dim_count_percent,
+	&dim_max_time,
+	&dim_min_time,
+	&dim_mean_time,
+	NULL,
+};
+
+static int fmt_width(struct perf_hpp_fmt *fmt,
+		     struct perf_hpp *hpp __maybe_unused,
+		     struct hists *hists __maybe_unused)
+{
+	struct kvm_fmt *kvm_fmt;
+
+	kvm_fmt = container_of(fmt, struct kvm_fmt, fmt);
+	return kvm_fmt->dim->width;
+}
+
+static int fmt_header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
+		      struct hists *hists, int line __maybe_unused,
+		      int *span __maybe_unused)
+{
+	struct kvm_fmt *kvm_fmt;
+	struct kvm_dimension *dim;
+	int width = fmt_width(fmt, hpp, hists);
+
+	kvm_fmt = container_of(fmt, struct kvm_fmt, fmt);
+	dim = kvm_fmt->dim;
+
+	return scnprintf(hpp->buf, hpp->size, "%*s", width, dim->header);
+}
+
+static bool fmt_equal(struct perf_hpp_fmt *a, struct perf_hpp_fmt *b)
+{
+	struct kvm_fmt *kvm_fmt_a = container_of(a, struct kvm_fmt, fmt);
+	struct kvm_fmt *kvm_fmt_b = container_of(b, struct kvm_fmt, fmt);
+
+	return kvm_fmt_a->dim == kvm_fmt_b->dim;
+}
+
+static void fmt_free(struct perf_hpp_fmt *fmt)
+{
+	struct kvm_fmt *kvm_fmt;
+
+	kvm_fmt = container_of(fmt, struct kvm_fmt, fmt);
+	free(kvm_fmt);
+}
+
+static struct kvm_dimension *get_dimension(const char *name)
+{
+	unsigned int i;
+
+	for (i = 0; dimensions[i] != NULL; i++) {
+		if (!strcmp(dimensions[i]->name, name))
+			return dimensions[i];
 	}
 
-	return false;
+	return NULL;
+}
+
+static struct kvm_fmt *get_format(const char *name)
+{
+	struct kvm_dimension *dim = get_dimension(name);
+	struct kvm_fmt *kvm_fmt;
+	struct perf_hpp_fmt *fmt;
+
+	if (!dim)
+		return NULL;
+
+	kvm_fmt = zalloc(sizeof(*kvm_fmt));
+	if (!kvm_fmt)
+		return NULL;
+
+	kvm_fmt->dim = dim;
+
+	fmt = &kvm_fmt->fmt;
+	INIT_LIST_HEAD(&fmt->list);
+	INIT_LIST_HEAD(&fmt->sort_list);
+	fmt->cmp	= dim->cmp;
+	fmt->sort	= dim->cmp;
+	fmt->color	= NULL;
+	fmt->entry	= dim->entry;
+	fmt->header	= fmt_header;
+	fmt->width	= fmt_width;
+	fmt->collapse	= dim->cmp;
+	fmt->equal	= fmt_equal;
+	fmt->free	= fmt_free;
+
+	return kvm_fmt;
+}
+
+static int kvm_hists__init_output(struct perf_hpp_list *hpp_list, char *name)
+{
+	struct kvm_fmt *kvm_fmt = get_format(name);
+
+	if (!kvm_fmt) {
+		pr_warning("Fail to find format for output field %s.\n", name);
+		return -EINVAL;
+	}
+
+	perf_hpp_list__column_register(hpp_list, &kvm_fmt->fmt);
+	return 0;
+}
+
+static int kvm_hists__init_sort(struct perf_hpp_list *hpp_list, char *name)
+{
+	struct kvm_fmt *kvm_fmt = get_format(name);
+
+	if (!kvm_fmt) {
+		pr_warning("Fail to find format for sorting %s.\n", name);
+		return -EINVAL;
+	}
+
+	perf_hpp_list__register_sort_field(hpp_list, &kvm_fmt->fmt);
+	return 0;
+}
+
+static int kvm_hpp_list__init(char *list,
+			      struct perf_hpp_list *hpp_list,
+			      int (*fn)(struct perf_hpp_list *hpp_list,
+					char *name))
+{
+	char *tmp, *tok;
+	int ret;
+
+	if (!list || !fn)
+		return 0;
+
+	for (tok = strtok_r(list, ", ", &tmp); tok;
+	     tok = strtok_r(NULL, ", ", &tmp)) {
+		ret = fn(hpp_list, tok);
+		if (!ret)
+			continue;
+
+		/* Handle errors */
+		if (ret == -EINVAL)
+			pr_err("Invalid field key: '%s'", tok);
+		else if (ret == -ESRCH)
+			pr_err("Unknown field key: '%s'", tok);
+		else
+			pr_err("Fail to initialize for field key: '%s'", tok);
+
+		break;
+	}
+
+	return ret;
+}
+
+static int kvm_hpp_list__parse(struct perf_hpp_list *hpp_list,
+			       const char *output_, const char *sort_)
+{
+	char *output = output_ ? strdup(output_) : NULL;
+	char *sort = sort_ ? strdup(sort_) : NULL;
+	int ret;
+
+	ret = kvm_hpp_list__init(output, hpp_list, kvm_hists__init_output);
+	if (ret)
+		goto out;
+
+	ret = kvm_hpp_list__init(sort, hpp_list, kvm_hists__init_sort);
+	if (ret)
+		goto out;
+
+	/* Copy sort keys to output fields */
+	perf_hpp__setup_output_field(hpp_list);
+
+	/* and then copy output fields to sort keys */
+	perf_hpp__append_sort_keys(hpp_list);
+out:
+	free(output);
+	free(sort);
+	return ret;
 }
 
-bool kvm_entry_event(struct evsel *evsel)
+static int kvm_hists__init(void)
 {
-	return !strcmp(evsel->name, kvm_entry_trace);
+	kvm_hists.list.nr_header_lines = 1;
+	__hists__init(&kvm_hists.hists, &kvm_hists.list);
+	perf_hpp_list__init(&kvm_hists.list);
+	return kvm_hpp_list__parse(&kvm_hists.list, NULL, "ev_name");
 }
 
-bool exit_event_end(struct evsel *evsel,
-		    struct perf_sample *sample __maybe_unused,
-		    struct event_key *key __maybe_unused)
+static int kvm_hists__reinit(const char *output, const char *sort)
 {
-	return kvm_entry_event(evsel);
+	perf_hpp__reset_output_field(&kvm_hists.list);
+	return kvm_hpp_list__parse(&kvm_hists.list, output, sort);
 }
+static void print_result(struct perf_kvm_stat *kvm);
 
-static const char *get_exit_reason(struct perf_kvm_stat *kvm,
-				   struct exit_reasons_table *tbl,
-				   u64 exit_code)
+#ifdef HAVE_SLANG_SUPPORT
+static void kvm_browser__update_nr_entries(struct hist_browser *hb)
 {
-	while (tbl->reason != NULL) {
-		if (tbl->exit_code == exit_code)
-			return tbl->reason;
-		tbl++;
+	struct rb_node *nd = rb_first_cached(&hb->hists->entries);
+	u64 nr_entries = 0;
+
+	for (; nd; nd = rb_next(nd)) {
+		struct hist_entry *he = rb_entry(nd, struct hist_entry,
+						 rb_node);
+
+		if (!he->filtered)
+			nr_entries++;
 	}
 
-	pr_err("unknown kvm exit code:%lld on %s\n",
-		(unsigned long long)exit_code, kvm->exit_reasons_isa);
-	return "UNKNOWN";
+	hb->nr_non_filtered_entries = nr_entries;
 }
 
-void exit_event_decode_key(struct perf_kvm_stat *kvm,
-			   struct event_key *key,
-			   char *decode)
+static int kvm_browser__title(struct hist_browser *browser,
+			      char *buf, size_t size)
 {
-	const char *exit_reason = get_exit_reason(kvm, key->exit_reasons,
-						  key->key);
+	scnprintf(buf, size, "KVM event statistics (%lu entries)",
+		  browser->nr_non_filtered_entries);
+	return 0;
+}
+
+static struct hist_browser*
+perf_kvm_browser__new(struct hists *hists)
+{
+	struct hist_browser *browser = hist_browser__new(hists);
 
-	scnprintf(decode, decode_str_len, "%s", exit_reason);
+	if (browser)
+		browser->title = kvm_browser__title;
+
+	return browser;
 }
 
+static int kvm__hists_browse(struct hists *hists)
+{
+	struct hist_browser *browser;
+	int key = -1;
+
+	browser = perf_kvm_browser__new(hists);
+	if (browser == NULL)
+		return -1;
+
+	/* reset abort key so that it can get Ctrl-C as a key */
+	SLang_reset_tty();
+	SLang_init_tty(0, 0, 0);
+
+	kvm_browser__update_nr_entries(browser);
+
+	while (1) {
+		key = hist_browser__run(browser, "? - help", true, 0);
+
+		switch (key) {
+		case 'q':
+			goto out;
+		default:
+			break;
+		}
+	}
+
+out:
+	hist_browser__delete(browser);
+	return 0;
+}
+
+static void kvm_display(struct perf_kvm_stat *kvm)
+{
+	if (!use_browser)
+		print_result(kvm);
+	else
+		kvm__hists_browse(&kvm_hists.hists);
+}
+
+#else
+
+static void kvm_display(struct perf_kvm_stat *kvm)
+{
+	use_browser = 0;
+	print_result(kvm);
+}
+
+#endif /* HAVE_SLANG_SUPPORT */
+
+#endif // defined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
+
+static const char *get_filename_for_perf_kvm(void)
+{
+	const char *filename;
+
+	if (perf_host && !perf_guest)
+		filename = strdup("perf.data.host");
+	else if (!perf_host && perf_guest)
+		filename = strdup("perf.data.guest");
+	else
+		filename = strdup("perf.data.kvm");
+
+	return filename;
+}
+
+#if defined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
+
 static bool register_kvm_events_ops(struct perf_kvm_stat *kvm)
 {
 	struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops;
@@ -145,44 +635,37 @@ struct vcpu_event_record {
 	struct kvm_event *last_event;
 };
 
-
-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)
+static void clear_events_cache_stats(void)
 {
-	struct list_head *head;
+	struct rb_root_cached *root;
+	struct rb_node *nd;
 	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);
-			}
+	int i;
+
+	if (hists__has(&kvm_hists.hists, need_collapse))
+		root = &kvm_hists.hists.entries_collapsed;
+	else
+		root = kvm_hists.hists.entries_in;
+
+	for (nd = rb_first_cached(root); nd; nd = rb_next(nd)) {
+		struct hist_entry *he;
+
+		he = rb_entry(nd, struct hist_entry, rb_node_in);
+		event = container_of(he, struct kvm_event, he);
+
+		/* reset stats for event */
+		event->total.time = 0;
+		init_stats(&event->total.stats);
+
+		for (i = 0; i < event->max_vcpu; ++i) {
+			event->vcpu[i].time = 0;
+			init_stats(&event->vcpu[i].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;
@@ -208,54 +691,78 @@ static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
 	return true;
 }
 
-static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
+static void *kvm_he_zalloc(size_t size)
 {
-	struct kvm_event *event;
+	struct kvm_event *kvm_ev;
 
-	event = zalloc(sizeof(*event));
-	if (!event) {
-		pr_err("Not enough memory\n");
+	kvm_ev = zalloc(size + sizeof(*kvm_ev));
+	if (!kvm_ev)
 		return NULL;
-	}
 
-	event->key = *key;
-	init_stats(&event->total.stats);
-	return event;
+	init_stats(&kvm_ev->total.stats);
+	hists__inc_nr_samples(&kvm_hists.hists, 0);
+	return &kvm_ev->he;
+}
+
+static void kvm_he_free(void *he)
+{
+	struct kvm_event *kvm_ev;
+
+	kvm_ev = container_of(he, struct kvm_event, he);
+	free(kvm_ev);
 }
 
+static struct hist_entry_ops kvm_ev_entry_ops = {
+	.new	= kvm_he_zalloc,
+	.free	= kvm_he_free,
+};
+
 static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm,
-					       struct event_key *key)
+					       struct event_key *key,
+					       struct perf_sample *sample)
 {
 	struct kvm_event *event;
-	struct list_head *head;
+	struct hist_entry *he;
+	struct kvm_info *ki;
 
 	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;
+	ki = kvm_info__new();
+	if (!ki) {
+		pr_err("Failed to allocate kvm info\n");
+		return NULL;
 	}
 
-	event = kvm_alloc_init_event(key);
-	if (!event)
+	kvm->events_ops->decode_key(kvm, key, ki->name);
+	he = hists__add_entry_ops(&kvm_hists.hists, &kvm_ev_entry_ops,
+				  &kvm->al, NULL, NULL, NULL, ki, sample, true);
+	if (he == NULL) {
+		pr_err("Failed to allocate hist entry\n");
+		free(ki);
 		return NULL;
+	}
+
+	event = container_of(he, struct kvm_event, he);
+	if (!event->perf_kvm) {
+		event->perf_kvm = kvm;
+		event->key = *key;
+	}
 
-	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 event_key *key,
+			       struct perf_sample *sample)
 {
 	struct kvm_event *event = NULL;
 
 	if (key->key != INVALID_KEY)
-		event = find_create_kvm_event(kvm, key);
+		event = find_create_kvm_event(kvm, key, sample);
 
 	vcpu_record->last_event = event;
-	vcpu_record->start_time = timestamp;
+	vcpu_record->start_time = sample->time;
 	return true;
 }
 
@@ -277,9 +784,14 @@ static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
 				avg_stats(&kvm_stats->stats));
 }
 
-static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
+static bool update_kvm_event(struct perf_kvm_stat *kvm,
+			     struct kvm_event *event, int vcpu_id,
 			     u64 time_diff)
 {
+	/* Update overall statistics */
+	kvm->total_count++;
+	kvm->total_time += time_diff;
+
 	if (vcpu_id == -1) {
 		kvm_update_event_stats(&event->total, time_diff);
 		return true;
@@ -305,7 +817,7 @@ static bool is_child_event(struct perf_kvm_stat *kvm,
 		return false;
 
 	for (; child_ops->name; child_ops++) {
-		if (!strcmp(evsel->name, child_ops->name)) {
+		if (evsel__name_is(evsel, child_ops->name)) {
 			child_ops->get_key(evsel, sample, key);
 			return true;
 		}
@@ -317,12 +829,12 @@ static bool is_child_event(struct perf_kvm_stat *kvm,
 static bool handle_child_event(struct perf_kvm_stat *kvm,
 			       struct vcpu_event_record *vcpu_record,
 			       struct event_key *key,
-			       struct perf_sample *sample __maybe_unused)
+			       struct perf_sample *sample)
 {
 	struct kvm_event *event = NULL;
 
 	if (key->key != INVALID_KEY)
-		event = find_create_kvm_event(kvm, key);
+		event = find_create_kvm_event(kvm, key, sample);
 
 	vcpu_record->last_event = event;
 
@@ -371,7 +883,7 @@ static bool handle_end_event(struct perf_kvm_stat *kvm,
 		return true;
 
 	if (!event)
-		event = find_create_kvm_event(kvm, key);
+		event = find_create_kvm_event(kvm, key, sample);
 
 	if (!event)
 		return false;
@@ -388,7 +900,7 @@ static bool handle_end_event(struct perf_kvm_stat *kvm,
 	time_diff = sample->time - time_begin;
 
 	if (kvm->duration && time_diff > kvm->duration) {
-		char decode[decode_str_len];
+		char decode[KVM_EVENT_NAME_LEN];
 
 		kvm->events_ops->decode_key(kvm, &event->key, decode);
 		if (!skip_event(decode)) {
@@ -398,7 +910,7 @@ static bool handle_end_event(struct perf_kvm_stat *kvm,
 		}
 	}
 
-	return update_kvm_event(event, vcpu, time_diff);
+	return update_kvm_event(kvm, event, vcpu, time_diff);
 }
 
 static
@@ -442,7 +954,7 @@ static bool handle_kvm_event(struct perf_kvm_stat *kvm,
 		return true;
 
 	if (kvm->events_ops->is_begin_event(evsel, sample, &key))
-		return handle_begin_event(kvm, vcpu_record, &key, sample->time);
+		return handle_begin_event(kvm, vcpu_record, &key, sample);
 
 	if (is_child_event(kvm, evsel, sample, &key))
 		return handle_child_event(kvm, vcpu_record, &key, sample);
@@ -453,119 +965,51 @@ static bool handle_kvm_event(struct perf_kvm_stat *kvm,
 	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 bool select_key(struct perf_kvm_stat *kvm)
+static bool is_valid_key(struct perf_kvm_stat *kvm)
 {
-	int i;
+	static const char *key_array[] = {
+		"ev_name", "sample", "time", "max_t", "min_t", "mean_t",
+	};
+	unsigned int i;
 
-	for (i = 0; keys[i].name; i++) {
-		if (!strcmp(keys[i].name, kvm->sort_key)) {
-			kvm->compare = keys[i].key;
+	for (i = 0; i < ARRAY_SIZE(key_array); i++)
+		if (!strcmp(key_array[i], kvm->sort_key))
 			return true;
-		}
-	}
 
-	pr_err("Unknown compare key:%s\n", kvm->sort_key);
+	pr_err("Unsupported sort 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)
+static int filter_cb(struct hist_entry *he, void *arg __maybe_unused)
 {
-	unsigned int i;
-	int vcpu = kvm->trace_vcpu;
 	struct kvm_event *event;
+	struct perf_kvm_stat *perf_kvm;
 
-	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);
-			}
-		}
-	}
+	event = container_of(he, struct kvm_event, he);
+	perf_kvm = event->perf_kvm;
+	if (!event_is_valid(event, perf_kvm->trace_vcpu))
+		he->filtered = 1;
+	else
+		he->filtered = 0;
+	return 0;
 }
 
-/* returns left most element of result, and erase it */
-static struct kvm_event *pop_from_result(struct rb_root *result)
+static void sort_result(struct perf_kvm_stat *kvm)
 {
-	struct rb_node *node = rb_first(result);
+	struct ui_progress prog;
+	const char *output_columns = "ev_name,sample,percent_sample,"
+				     "time,percent_time,max_t,min_t,mean_t";
 
-	if (!node)
-		return NULL;
-
-	rb_erase(node, result);
-	return container_of(node, struct kvm_event, rb);
+	kvm_hists__reinit(output_columns, kvm->sort_key);
+	ui_progress__init(&prog, kvm_hists.hists.nr_entries, "Sorting...");
+	hists__collapse_resort(&kvm_hists.hists, NULL);
+	hists__output_resort_cb(&kvm_hists.hists, NULL, filter_cb);
+	ui_progress__finish();
 }
 
 static void print_vcpu_info(struct perf_kvm_stat *kvm)
@@ -605,9 +1049,10 @@ static void show_timeofday(void)
 
 static void print_result(struct perf_kvm_stat *kvm)
 {
-	char decode[decode_str_len];
+	char decode[KVM_EVENT_NAME_LEN];
 	struct kvm_event *event;
 	int vcpu = kvm->trace_vcpu;
+	struct rb_node *nd;
 
 	if (kvm->live) {
 		puts(CONSOLE_CLEAR);
@@ -616,7 +1061,7 @@ static void print_result(struct perf_kvm_stat *kvm)
 
 	pr_info("\n\n");
 	print_vcpu_info(kvm);
-	pr_info("%*s ", decode_str_len, kvm->events_ops->name);
+	pr_info("%*s ", KVM_EVENT_NAME_LEN, kvm->events_ops->name);
 	pr_info("%10s ", "Samples");
 	pr_info("%9s ", "Samples%");
 
@@ -626,16 +1071,22 @@ static void print_result(struct perf_kvm_stat *kvm)
 	pr_info("%16s ", "Avg time");
 	pr_info("\n\n");
 
-	while ((event = pop_from_result(&kvm->result))) {
+	for (nd = rb_first_cached(&kvm_hists.hists.entries); nd; nd = rb_next(nd)) {
+		struct hist_entry *he;
 		u64 ecount, etime, max, min;
 
+		he = rb_entry(nd, struct hist_entry, rb_node);
+		if (he->filtered)
+			continue;
+
+		event = container_of(he, struct kvm_event, he);
 		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("%*s ", decode_str_len, decode);
+		pr_info("%*s ", KVM_EVENT_NAME_LEN, 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);
@@ -653,8 +1104,8 @@ static void print_result(struct perf_kvm_stat *kvm)
 		pr_info("\nLost events: %" PRIu64 "\n\n", kvm->lost_events);
 }
 
-#ifdef HAVE_TIMERFD_SUPPORT
-static int process_lost_event(struct perf_tool *tool,
+#if defined(HAVE_TIMERFD_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
+static int process_lost_event(const struct perf_tool *tool,
 			      union perf_event *event __maybe_unused,
 			      struct perf_sample *sample __maybe_unused,
 			      struct machine *machine __maybe_unused)
@@ -675,7 +1126,7 @@ static bool skip_sample(struct perf_kvm_stat *kvm,
 	return false;
 }
 
-static int process_sample_event(struct perf_tool *tool,
+static int process_sample_event(const struct perf_tool *tool,
 				union perf_event *event,
 				struct perf_sample *sample,
 				struct evsel *evsel,
@@ -689,6 +1140,11 @@ static int process_sample_event(struct perf_tool *tool,
 	if (skip_sample(kvm, sample))
 		return 0;
 
+	if (machine__resolve(machine, &kvm->al, sample) < 0) {
+		pr_warning("Fail to resolve address location, skip sample.\n");
+		return 0;
+	}
+
 	thread = machine__findnew_thread(machine, sample->pid, sample->tid);
 	if (thread == NULL) {
 		pr_debug("problem processing %d event, skipping it.\n",
@@ -709,7 +1165,9 @@ static int cpu_isa_config(struct perf_kvm_stat *kvm)
 	int err;
 
 	if (kvm->live) {
-		err = get_cpuid(buf, sizeof(buf));
+		struct perf_cpu cpu = {-1};
+
+		err = get_cpuid(buf, sizeof(buf), cpu);
 		if (err != 0) {
 			pr_err("Failed to look up CPU type: %s\n",
 			       str_error_r(err, buf, sizeof(buf)));
@@ -741,7 +1199,7 @@ static bool verify_vcpu(int vcpu)
 	return true;
 }
 
-#ifdef HAVE_TIMERFD_SUPPORT
+#if defined(HAVE_TIMERFD_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
 /* keeping the max events to a modest level to keep
  * the processing of samples per mmap smooth.
  */
@@ -764,14 +1222,14 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
 		return (err == -EAGAIN) ? 0 : -1;
 
 	while ((event = perf_mmap__read_event(&md->core)) != NULL) {
-		err = perf_evlist__parse_sample_timestamp(evlist, event, &timestamp);
+		err = evlist__parse_sample_timestamp(evlist, event, &timestamp);
 		if (err) {
 			perf_mmap__consume(&md->core);
 			pr_err("Failed to parse sample\n");
 			return -1;
 		}
 
-		err = perf_session__queue_event(kvm->session, event, timestamp, 0);
+		err = perf_session__queue_event(kvm->session, event, timestamp, 0, NULL);
 		/*
 		 * 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.
@@ -900,8 +1358,11 @@ static int perf_kvm__handle_timerfd(struct perf_kvm_stat *kvm)
 	sort_result(kvm);
 	print_result(kvm);
 
+	/* Reset sort list to "ev_name" */
+	kvm_hists__reinit(NULL, "ev_name");
+
 	/* reset counts */
-	clear_events_cache_stats(kvm->kvm_events_cache);
+	clear_events_cache_stats();
 	kvm->total_count = 0;
 	kvm->total_time = 0;
 	kvm->lost_events = 0;
@@ -951,13 +1412,14 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
 		return ret;
 
 	if (!verify_vcpu(kvm->trace_vcpu) ||
-	    !select_key(kvm) ||
+	    !is_valid_key(kvm) ||
 	    !register_kvm_events_ops(kvm)) {
 		goto out;
 	}
 
 	set_term_quiet_input(&save);
-	init_kvm_event_record(kvm);
+
+	kvm_hists__init();
 
 	signal(SIGINT, sig_handler);
 	signal(SIGTERM, sig_handler);
@@ -1008,6 +1470,8 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
 	}
 
 out:
+	hists__delete_entries(&kvm_hists.hists);
+
 	if (kvm->timerfd >= 0)
 		close(kvm->timerfd);
 
@@ -1022,7 +1486,7 @@ static int kvm_live_open_events(struct perf_kvm_stat *kvm)
 	struct evlist *evlist = kvm->evlist;
 	char sbuf[STRERR_BUFSIZE];
 
-	perf_evlist__config(evlist, &kvm->opts, NULL);
+	evlist__config(evlist, &kvm->opts, NULL);
 
 	/*
 	 * Note: exclude_{guest,host} do not apply here.
@@ -1080,20 +1544,18 @@ static int read_events(struct perf_kvm_stat *kvm)
 {
 	int ret;
 
-	struct perf_tool eops = {
-		.sample			= process_sample_event,
-		.comm			= perf_event__process_comm,
-		.namespaces		= perf_event__process_namespaces,
-		.ordered_events		= true,
-	};
 	struct perf_data file = {
 		.path  = kvm->file_name,
 		.mode  = PERF_DATA_MODE_READ,
 		.force = kvm->force,
 	};
 
-	kvm->tool = eops;
-	kvm->session = perf_session__new(&file, false, &kvm->tool);
+	perf_tool__init(&kvm->tool, /*ordered_events=*/true);
+	kvm->tool.sample	= process_sample_event;
+	kvm->tool.comm		= perf_event__process_comm;
+	kvm->tool.namespaces	= perf_event__process_namespaces;
+
+	kvm->session = perf_session__new(&file, &kvm->tool);
 	if (IS_ERR(kvm->session)) {
 		pr_err("Initializing perf session failed\n");
 		return PTR_ERR(kvm->session);
@@ -1145,23 +1607,32 @@ static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
 	if (!verify_vcpu(vcpu))
 		goto exit;
 
-	if (!select_key(kvm))
+	if (!is_valid_key(kvm))
 		goto exit;
 
 	if (!register_kvm_events_ops(kvm))
 		goto exit;
 
-	init_kvm_event_record(kvm);
-	setup_pager();
+	if (kvm->use_stdio) {
+		use_browser = 0;
+		setup_pager();
+	} else {
+		use_browser = 1;
+	}
+
+	setup_browser(false);
+
+	kvm_hists__init();
 
 	ret = read_events(kvm);
 	if (ret)
 		goto exit;
 
 	sort_result(kvm);
-	print_result(kvm);
+	kvm_display(kvm);
 
 exit:
+	hists__delete_entries(&kvm_hists.hists);
 	return ret;
 }
 
@@ -1266,6 +1737,7 @@ kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
 		OPT_STRING('p', "pid", &kvm->opts.target.pid, "pid",
 			   "analyze events only for given process id(s)"),
 		OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"),
+		OPT_BOOLEAN(0, "stdio", &kvm->use_stdio, "use the stdio interface"),
 		OPT_END()
 	};
 
@@ -1283,13 +1755,17 @@ kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
 					   kvm_events_report_options);
 	}
 
+#ifndef HAVE_SLANG_SUPPORT
+	kvm->use_stdio = true;
+#endif
+
 	if (!kvm->opts.target.pid)
 		kvm->opts.target.system_wide = true;
 
 	return kvm_events_report_vcpu(kvm);
 }
 
-#ifdef HAVE_TIMERFD_SUPPORT
+#if defined(HAVE_TIMERFD_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
 static struct evlist *kvm_live_event_list(void)
 {
 	struct evlist *evlist;
@@ -1319,7 +1795,7 @@ static struct evlist *kvm_live_event_list(void)
 		*name = '\0';
 		name++;
 
-		if (perf_evlist__add_newtp(evlist, sys, name, NULL)) {
+		if (evlist__add_newtp(evlist, sys, name, NULL)) {
 			pr_err("Failed to add %s tracepoint to the list\n", *events_tp);
 			free(tp);
 			goto out;
@@ -1349,8 +1825,7 @@ static int kvm_events_live(struct perf_kvm_stat *kvm,
 		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),
+			"number of mmap data pages", 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,
@@ -1383,14 +1858,13 @@ static int kvm_events_live(struct perf_kvm_stat *kvm,
 
 
 	/* event handling */
+	perf_tool__init(&kvm->tool, /*ordered_events=*/true);
 	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.namespaces  = perf_event__process_namespaces;
-	kvm->tool.ordered_events = true;
-	perf_tool__fill_defaults(&kvm->tool);
 
 	/* set defaults */
 	kvm->display_time = 1;
@@ -1442,13 +1916,13 @@ static int kvm_events_live(struct perf_kvm_stat *kvm,
 		goto out;
 	}
 
-	if (perf_evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
+	if (evlist__create_maps(kvm->evlist, &kvm->opts.target) < 0)
 		usage_with_options(live_usage, live_options);
 
 	/*
 	 * perf session
 	 */
-	kvm->session = perf_session__new(&data, false, &kvm->tool);
+	kvm->session = perf_session__new(&data, &kvm->tool);
 	if (IS_ERR(kvm->session)) {
 		err = PTR_ERR(kvm->session);
 		goto out;
@@ -1457,7 +1931,7 @@ static int kvm_events_live(struct perf_kvm_stat *kvm,
 	perf_session__set_id_hdr_size(kvm->session);
 	ordered_events__set_copy_on_queue(&kvm->session->ordered_events, true);
 	machine__synthesize_threads(&kvm->session->machines.host, &kvm->opts.target,
-				    kvm->evlist->core.threads, false, 1);
+				    kvm->evlist->core.threads, true, false, 1);
 	err = kvm_live_open_events(kvm);
 	if (err)
 		goto out;
@@ -1501,13 +1975,13 @@ static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
 		goto perf_stat;
 	}
 
-	if (!strncmp(argv[1], "rec", 3))
+	if (strlen(argv[1]) > 2 && strstarts("record", argv[1]))
 		return kvm_events_record(&kvm, argc - 1, argv + 1);
 
-	if (!strncmp(argv[1], "rep", 3))
+	if (strlen(argv[1]) > 2 && strstarts("report", argv[1]))
 		return kvm_events_report(&kvm, argc - 1 , argv + 1);
 
-#ifdef HAVE_TIMERFD_SUPPORT
+#if defined(HAVE_TIMERFD_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
 	if (!strncmp(argv[1], "live", 4))
 		return kvm_events_live(&kvm, argc - 1 , argv + 1);
 #endif
@@ -1603,6 +2077,8 @@ int cmd_kvm(int argc, const char **argv)
 			   "file", "file saving guest os /proc/kallsyms"),
 		OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
 			   "file", "file saving guest os /proc/modules"),
+		OPT_BOOLEAN(0, "guest-code", &symbol_conf.guest_code,
+			    "Guest code can be found in hypervisor process"),
 		OPT_INCR('v', "verbose", &verbose,
 			    "be more verbose (show counter open errors, etc)"),
 		OPT_END()
@@ -1612,6 +2088,7 @@ int cmd_kvm(int argc, const char **argv)
 						"buildid-list", "stat", NULL };
 	const char *kvm_usage[] = { NULL, NULL };
 
+	exclude_GH_default = true;
 	perf_host  = 0;
 	perf_guest = 1;
 
@@ -1632,22 +2109,25 @@ int cmd_kvm(int argc, const char **argv)
 		}
 	}
 
-	if (!strncmp(argv[0], "rec", 3))
+	if (strlen(argv[0]) > 2 && strstarts("record", argv[0]))
 		return __cmd_record(file_name, argc, argv);
-	else if (!strncmp(argv[0], "rep", 3))
+	else if (strlen(argv[0]) > 2 && strstarts("report", argv[0]))
 		return __cmd_report(file_name, argc, argv);
-	else if (!strncmp(argv[0], "diff", 4))
+	else if (strlen(argv[0]) > 2 && strstarts("diff", argv[0]))
 		return cmd_diff(argc, argv);
-	else if (!strncmp(argv[0], "top", 3))
+	else if (!strcmp(argv[0], "top"))
 		return cmd_top(argc, argv);
-	else if (!strncmp(argv[0], "buildid-list", 12))
+	else if (strlen(argv[0]) > 2 && strstarts("buildid-list", argv[0]))
 		return __cmd_buildid_list(file_name, argc, argv);
-#ifdef HAVE_KVM_STAT_SUPPORT
-	else if (!strncmp(argv[0], "stat", 4))
+#if defined(HAVE_KVM_STAT_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
+	else if (strlen(argv[0]) > 2 && strstarts("stat", argv[0]))
 		return kvm_cmd_stat(file_name, argc, argv);
 #endif
 	else
 		usage_with_options(kvm_usage, kvm_options);
 
+	/* free usage string allocated by parse_options_subcommand */
+	free((void *)kvm_usage[0]);
+
 	return 0;
 }