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-rw-r--r--tools/perf/builtin-kvm.c754
1 files changed, 716 insertions, 38 deletions
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 24b78aecc928..935d52216c89 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -2,22 +2,26 @@
#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 <lk/debugfs.h>
#include "util/tool.h"
#include "util/stat.h"
+#include "util/top.h"
#include <sys/prctl.h>
+#include <sys/timerfd.h>
+#include <termios.h>
#include <semaphore.h>
#include <pthread.h>
#include <math.h>
@@ -82,6 +86,8 @@ struct exit_reasons_table {
struct perf_kvm_stat {
struct perf_tool tool;
+ struct perf_record_opts opts;
+ struct perf_evlist *evlist;
struct perf_session *session;
const char *file_name;
@@ -96,10 +102,20 @@ struct perf_kvm_stat {
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;
};
@@ -320,6 +336,28 @@ static void init_kvm_event_record(struct perf_kvm_stat *kvm)
INIT_LIST_HEAD(&kvm->kvm_events_cache[i]);
}
+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);
+ }
+ }
+ }
+}
+
static int kvm_events_hash_fn(u64 key)
{
return key & (EVENTS_CACHE_SIZE - 1);
@@ -436,7 +474,7 @@ static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
static bool handle_end_event(struct perf_kvm_stat *kvm,
struct vcpu_event_record *vcpu_record,
struct event_key *key,
- u64 timestamp)
+ struct perf_sample *sample)
{
struct kvm_event *event;
u64 time_begin, time_diff;
@@ -472,9 +510,25 @@ static bool handle_end_event(struct perf_kvm_stat *kvm,
vcpu_record->last_event = NULL;
vcpu_record->start_time = 0;
- BUG_ON(timestamp < time_begin);
+ /* 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);
+ }
+ }
- time_diff = timestamp - time_begin;
return update_kvm_event(event, vcpu, time_diff);
}
@@ -521,7 +575,7 @@ static bool handle_kvm_event(struct perf_kvm_stat *kvm,
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 handle_end_event(kvm, vcpu_record, &key, sample);
return true;
}
@@ -550,6 +604,8 @@ static int compare_kvm_event_ ## func(struct kvm_event *one, \
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 }
@@ -639,43 +695,81 @@ static struct kvm_event *pop_from_result(struct rb_root *result)
return container_of(node, struct kvm_event, rb);
}
-static void print_vcpu_info(int vcpu)
+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(vcpu);
+ 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;
+ 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");
@@ -683,6 +777,29 @@ static void print_result(struct perf_kvm_stat *kvm)
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);
+}
+
+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;
+}
+
+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,
@@ -691,10 +808,14 @@ static int process_sample_event(struct perf_tool *tool,
struct perf_evsel *evsel,
struct machine *machine)
{
- struct thread *thread = machine__findnew_thread(machine, sample->tid);
+ 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);
@@ -707,10 +828,20 @@ static int process_sample_event(struct perf_tool *tool,
return 0;
}
-static int get_cpu_isa(struct perf_session *session)
+static int cpu_isa_config(struct perf_kvm_stat *kvm)
{
- char *cpuid = session->header.env.cpuid;
- int isa;
+ 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;
@@ -718,10 +849,361 @@ static int get_cpu_isa(struct perf_session *session)
isa = 0;
else {
pr_err("CPU %s is not supported.\n", cpuid);
- isa = -ENOTSUP;
+ 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;
+}
+
+/* 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) {
+ pr_err("Failed to parse sample\n");
+ return -1;
+ }
+
+ err = perf_session_queue_event(kvm->session, event, &sample, 0);
+ 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);
+
+ if (pollfds)
+ free(pollfds);
- return isa;
+ 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
+ */
+ list_for_each_entry(pos, &evlist->entries, node) {
+ 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;
}
static int read_events(struct perf_kvm_stat *kvm)
@@ -749,28 +1231,24 @@ static int read_events(struct perf_kvm_stat *kvm)
* Do not use 'isa' recorded in kvm_exit tracepoint since it is not
* traced in the old kernel.
*/
- ret = get_cpu_isa(kvm->session);
-
+ ret = cpu_isa_config(kvm);
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)
+static int parse_target_str(struct perf_kvm_stat *kvm)
{
- if (vcpu != -1 && vcpu < 0) {
- pr_err("Invalid vcpu:%d.\n", vcpu);
- return false;
+ 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 true;
+ return 0;
}
static int kvm_events_report_vcpu(struct perf_kvm_stat *kvm)
@@ -778,6 +1256,9 @@ 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;
@@ -801,16 +1282,11 @@ 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",
+static const char * const kvm_events_tp[] = {
+ "kvm:kvm_entry",
+ "kvm:kvm_exit",
+ "kvm:kvm_mmio",
+ "kvm:kvm_pio",
};
#define STRDUP_FAIL_EXIT(s) \
@@ -826,8 +1302,15 @@ 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;
+ 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)
@@ -836,6 +1319,11 @@ kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
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);
@@ -856,6 +1344,8 @@ kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
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()
};
@@ -878,6 +1368,190 @@ kvm_events_report(struct perf_kvm_stat *kvm, int argc, const char **argv)
return kvm_events_report_vcpu(kvm);
}
+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_UINTEGER('m', "mmap-pages", &kvm->opts.mmap_pages,
+ "number of mmap data 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
+ };
+
+
+ /* 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 = perf_target__validate(&kvm->opts.target);
+ if (err) {
+ perf_target__strerror(&kvm->opts.target, err, errbuf, BUFSIZ);
+ ui__warning("%s", errbuf);
+ }
+
+ if (perf_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(NULL, O_WRONLY, false, false, &kvm->tool);
+ if (kvm->session == NULL) {
+ err = -ENOMEM;
+ goto out;
+ }
+ kvm->session->evlist = kvm->evlist;
+ perf_session__set_id_hdr_size(kvm->session);
+
+
+ if (perf_target__has_task(&kvm->opts.target))
+ perf_event__synthesize_thread_map(&kvm->tool,
+ kvm->evlist->threads,
+ perf_event__process,
+ &kvm->session->machines.host);
+ else
+ perf_event__synthesize_threads(&kvm->tool, perf_event__process,
+ &kvm->session->machines.host);
+
+
+ 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_maps(kvm->evlist);
+ perf_evlist__delete(kvm->evlist);
+ }
+
+ return err;
+}
+
static void print_kvm_stat_usage(void)
{
printf("Usage: perf kvm stat <command>\n\n");
@@ -885,6 +1559,7 @@ static void print_kvm_stat_usage(void)
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");
}
@@ -914,6 +1589,9 @@ static int kvm_cmd_stat(const char *file_name, int argc, const char **argv)
if (!strncmp(argv[1], "rep", 3))
return kvm_events_report(&kvm, argc - 1 , argv + 1);
+ if (!strncmp(argv[1], "live", 4))
+ return kvm_events_live(&kvm, argc - 1 , argv + 1);
+
perf_stat:
return cmd_stat(argc, argv, NULL);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.