![David Ahern](/assets/img/avatar_default.png)
Save previous pointer and free on failure. Signed-off-by: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Runzhen Wang <runzhen@linux.vnet.ibm.com> Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1369527896-3650-7-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1051 lines
24 KiB
C
1051 lines
24 KiB
C
#include "builtin.h"
|
|
#include "perf.h"
|
|
|
|
#include "util/evsel.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/parse-options.h"
|
|
#include "util/trace-event.h"
|
|
#include "util/debug.h"
|
|
#include <lk/debugfs.h>
|
|
#include "util/tool.h"
|
|
#include "util/stat.h"
|
|
|
|
#include <sys/prctl.h>
|
|
|
|
#include <semaphore.h>
|
|
#include <pthread.h>
|
|
#include <math.h>
|
|
|
|
#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 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;
|
|
|
|
struct rb_root result;
|
|
};
|
|
|
|
|
|
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;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
struct vcpu_event_record {
|
|
int vcpu_id;
|
|
u64 start_time;
|
|
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]);
|
|
}
|
|
|
|
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;
|
|
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,
|
|
u64 timestamp)
|
|
{
|
|
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;
|
|
|
|
BUG_ON(timestamp < time_begin);
|
|
|
|
time_diff = timestamp - time_begin;
|
|
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->time);
|
|
|
|
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);
|
|
|
|
#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)
|
|
{
|
|
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(int vcpu)
|
|
{
|
|
pr_info("Analyze events for ");
|
|
|
|
if (vcpu == -1)
|
|
pr_info("all VCPUs:\n\n");
|
|
else
|
|
pr_info("VCPU %d:\n\n", vcpu);
|
|
}
|
|
|
|
static void print_result(struct perf_kvm_stat *kvm)
|
|
{
|
|
char decode[20];
|
|
struct kvm_event *event;
|
|
int vcpu = kvm->trace_vcpu;
|
|
|
|
pr_info("\n\n");
|
|
print_vcpu_info(vcpu);
|
|
pr_info("%20s ", kvm->events_ops->name);
|
|
pr_info("%10s ", "Samples");
|
|
pr_info("%9s ", "Samples%");
|
|
|
|
pr_info("%9s ", "Time%");
|
|
pr_info("%16s ", "Avg time");
|
|
pr_info("\n\n");
|
|
|
|
while ((event = pop_from_result(&kvm->result))) {
|
|
u64 ecount, etime;
|
|
|
|
ecount = get_event_count(event, vcpu);
|
|
etime = get_event_time(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("%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);
|
|
}
|
|
|
|
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 = machine__findnew_thread(machine, sample->tid);
|
|
struct perf_kvm_stat *kvm = container_of(tool, struct perf_kvm_stat,
|
|
tool);
|
|
|
|
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 get_cpu_isa(struct perf_session *session)
|
|
{
|
|
char *cpuid = session->header.env.cpuid;
|
|
int isa;
|
|
|
|
if (strstr(cpuid, "Intel"))
|
|
isa = 1;
|
|
else if (strstr(cpuid, "AMD"))
|
|
isa = 0;
|
|
else {
|
|
pr_err("CPU %s is not supported.\n", cpuid);
|
|
isa = -ENOTSUP;
|
|
}
|
|
|
|
return isa;
|
|
}
|
|
|
|
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,
|
|
};
|
|
|
|
kvm->tool = eops;
|
|
kvm->session = perf_session__new(kvm->file_name, O_RDONLY, 0, 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 = get_cpu_isa(kvm->session);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (ret == 1) {
|
|
kvm->exit_reasons = vmx_exit_reasons;
|
|
kvm->exit_reasons_size = ARRAY_SIZE(vmx_exit_reasons);
|
|
kvm->exit_reasons_isa = "VMX";
|
|
}
|
|
|
|
return perf_session__process_events(kvm->session, &kvm->tool);
|
|
}
|
|
|
|
static bool verify_vcpu(int vcpu)
|
|
{
|
|
if (vcpu != -1 && vcpu < 0) {
|
|
pr_err("Invalid vcpu:%d.\n", vcpu);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
|
|
{
|
|
int ret = -EINVAL;
|
|
int vcpu = kvm->trace_vcpu;
|
|
|
|
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 record_args[] = {
|
|
"record",
|
|
"-R",
|
|
"-f",
|
|
"-m", "1024",
|
|
"-c", "1",
|
|
"-e", "kvm:kvm_entry",
|
|
"-e", "kvm:kvm_exit",
|
|
"-e", "kvm:kvm_mmio",
|
|
"-e", "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;
|
|
|
|
rec_argc = ARRAY_SIZE(record_args) + argc + 2;
|
|
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]);
|
|
|
|
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_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);
|
|
}
|
|
|
|
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("\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);
|
|
|
|
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;
|
|
|
|
rec_argc = argc + 2;
|
|
rec_argv = calloc(rec_argc + 1, sizeof(char *));
|
|
rec_argv[i++] = strdup("record");
|
|
rec_argv[i++] = strdup("-o");
|
|
rec_argv[i++] = strdup(file_name);
|
|
for (j = 1; j < argc; j++, i++)
|
|
rec_argv[i] = argv[j];
|
|
|
|
BUG_ON(i != rec_argc);
|
|
|
|
return cmd_record(i, rec_argv, NULL);
|
|
}
|
|
|
|
static int __cmd_report(const char *file_name, int argc, const char **argv)
|
|
{
|
|
int rec_argc, i = 0, j;
|
|
const char **rec_argv;
|
|
|
|
rec_argc = argc + 2;
|
|
rec_argv = calloc(rec_argc + 1, sizeof(char *));
|
|
rec_argv[i++] = strdup("report");
|
|
rec_argv[i++] = strdup("-i");
|
|
rec_argv[i++] = strdup(file_name);
|
|
for (j = 1; j < argc; j++, i++)
|
|
rec_argv[i] = argv[j];
|
|
|
|
BUG_ON(i != rec_argc);
|
|
|
|
return cmd_report(i, rec_argv, NULL);
|
|
}
|
|
|
|
static int
|
|
__cmd_buildid_list(const char *file_name, int argc, const char **argv)
|
|
{
|
|
int rec_argc, i = 0, j;
|
|
const char **rec_argv;
|
|
|
|
rec_argc = argc + 2;
|
|
rec_argv = calloc(rec_argc + 1, sizeof(char *));
|
|
rec_argv[i++] = strdup("buildid-list");
|
|
rec_argv[i++] = strdup("-i");
|
|
rec_argv[i++] = strdup(file_name);
|
|
for (j = 1; j < argc; j++, i++)
|
|
rec_argv[i] = argv[j];
|
|
|
|
BUG_ON(i != rec_argc);
|
|
|
|
return cmd_buildid_list(i, rec_argv, NULL);
|
|
}
|
|
|
|
int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
|
|
{
|
|
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_END()
|
|
};
|
|
|
|
|
|
const char * const kvm_usage[] = {
|
|
"perf kvm [<options>] {top|record|report|diff|buildid-list|stat}",
|
|
NULL
|
|
};
|
|
|
|
perf_host = 0;
|
|
perf_guest = 1;
|
|
|
|
argc = parse_options(argc, argv, kvm_options, kvm_usage,
|
|
PARSE_OPT_STOP_AT_NON_OPTION);
|
|
if (!argc)
|
|
usage_with_options(kvm_usage, kvm_options);
|
|
|
|
if (!perf_host)
|
|
perf_guest = 1;
|
|
|
|
if (!file_name) {
|
|
if (perf_host && !perf_guest)
|
|
file_name = strdup("perf.data.host");
|
|
else if (!perf_host && perf_guest)
|
|
file_name = strdup("perf.data.guest");
|
|
else
|
|
file_name = strdup("perf.data.kvm");
|
|
|
|
if (!file_name) {
|
|
pr_err("Failed to allocate memory for filename\n");
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
if (!strncmp(argv[0], "rec", 3))
|
|
return __cmd_record(file_name, argc, argv);
|
|
else if (!strncmp(argv[0], "rep", 3))
|
|
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(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);
|
|
|
|
return 0;
|
|
}
|