| // SPDX-License-Identifier: GPL-2.0 |
| #include "builtin.h" |
| #include "perf.h" |
| |
| #include "util/build-id.h" |
| #include "util/evsel.h" |
| #include "util/evlist.h" |
| #include "util/mmap.h" |
| #include "util/term.h" |
| #include "util/symbol.h" |
| #include "util/thread.h" |
| #include "util/header.h" |
| #include "util/session.h" |
| #include "util/intlist.h" |
| #include <subcmd/pager.h> |
| #include <subcmd/parse-options.h> |
| #include "util/trace-event.h" |
| #include "util/debug.h" |
| #include "util/tool.h" |
| #include "util/stat.h" |
| #include "util/synthetic-events.h" |
| #include "util/top.h" |
| #include "util/data.h" |
| #include "util/ordered-events.h" |
| #include "util/kvm-stat.h" |
| #include "ui/ui.h" |
| #include "util/string2.h" |
| |
| #include <sys/prctl.h> |
| #ifdef HAVE_TIMERFD_SUPPORT |
| #include <sys/timerfd.h> |
| #endif |
| #include <sys/time.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| |
| #include <linux/err.h> |
| #include <linux/kernel.h> |
| #include <linux/string.h> |
| #include <linux/time64.h> |
| #include <linux/zalloc.h> |
| #include <errno.h> |
| #include <inttypes.h> |
| #include <poll.h> |
| #include <termios.h> |
| #include <semaphore.h> |
| #include <signal.h> |
| #include <math.h> |
| #include <perf/mmap.h> |
| |
| 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; |
| } |
| |
| #ifdef HAVE_KVM_STAT_SUPPORT |
| |
| void exit_event_get_key(struct evsel *evsel, |
| struct perf_sample *sample, |
| struct event_key *key) |
| { |
| key->info = 0; |
| key->key = evsel__intval(evsel, sample, kvm_exit_reason); |
| } |
| |
| bool kvm_exit_event(struct evsel *evsel) |
| { |
| return !strcmp(evsel->name, kvm_exit_trace); |
| } |
| |
| bool exit_event_begin(struct 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; |
| } |
| |
| bool kvm_entry_event(struct evsel *evsel) |
| { |
| return !strcmp(evsel->name, kvm_entry_trace); |
| } |
| |
| bool exit_event_end(struct evsel *evsel, |
| struct perf_sample *sample __maybe_unused, |
| struct event_key *key __maybe_unused) |
| { |
| return kvm_entry_event(evsel); |
| } |
| |
| static const char *get_exit_reason(struct perf_kvm_stat *kvm, |
| struct exit_reasons_table *tbl, |
| u64 exit_code) |
| { |
| while (tbl->reason != NULL) { |
| 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"; |
| } |
| |
| void exit_event_decode_key(struct perf_kvm_stat *kvm, |
| struct event_key *key, |
| char *decode) |
| { |
| const char *exit_reason = get_exit_reason(kvm, key->exit_reasons, |
| key->key); |
| |
| scnprintf(decode, decode_str_len, "%s", exit_reason); |
| } |
| |
| static bool register_kvm_events_ops(struct perf_kvm_stat *kvm) |
| { |
| struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops; |
| |
| for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) { |
| if (!strcmp(events_ops->name, kvm->report_event)) { |
| kvm->events_ops = events_ops->ops; |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| 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]); |
| } |
| |
| #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 is_child_event(struct perf_kvm_stat *kvm, |
| struct evsel *evsel, |
| struct perf_sample *sample, |
| struct event_key *key) |
| { |
| struct child_event_ops *child_ops; |
| |
| child_ops = kvm->events_ops->child_ops; |
| |
| if (!child_ops) |
| return false; |
| |
| for (; child_ops->name; child_ops++) { |
| if (!strcmp(evsel->name, child_ops->name)) { |
| child_ops->get_key(evsel, sample, key); |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| 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 kvm_event *event = NULL; |
| |
| if (key->key != INVALID_KEY) |
| event = find_create_kvm_event(kvm, key); |
| |
| vcpu_record->last_event = event; |
| |
| return true; |
| } |
| |
| static bool skip_event(const char *event) |
| { |
| const char * const *skip_events; |
| |
| for (skip_events = kvm_skip_events; *skip_events; skip_events++) |
| if (!strcmp(event, *skip_events)) |
| return true; |
| |
| return false; |
| } |
| |
| 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[decode_str_len]; |
| |
| kvm->events_ops->decode_key(kvm, &event->key, decode); |
| if (!skip_event(decode)) { |
| pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n", |
| sample->time, sample->pid, vcpu_record->vcpu_id, |
| decode, time_diff / NSEC_PER_USEC); |
| } |
| } |
| |
| return update_kvm_event(event, vcpu, time_diff); |
| } |
| |
| static |
| struct vcpu_event_record *per_vcpu_record(struct thread *thread, |
| struct evsel *evsel, |
| struct perf_sample *sample) |
| { |
| /* Only kvm_entry records vcpu id. */ |
| if (!thread__priv(thread) && 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 = evsel__intval(evsel, sample, vcpu_id_str); |
| thread__set_priv(thread, vcpu_record); |
| } |
| |
| return thread__priv(thread); |
| } |
| |
| static bool handle_kvm_event(struct perf_kvm_stat *kvm, |
| struct thread *thread, |
| struct evsel *evsel, |
| struct perf_sample *sample) |
| { |
| struct vcpu_event_record *vcpu_record; |
| struct event_key key = { .key = INVALID_KEY, |
| .exit_reasons = kvm->exit_reasons }; |
| |
| 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 (is_child_event(kvm, evsel, sample, &key)) |
| return handle_child_event(kvm, vcpu_record, &key, sample); |
| |
| 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 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->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, <ime)) { |
| strftime(date, sizeof(date), "%H:%M:%S", <ime); |
| 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[decode_str_len]; |
| 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("%*s ", decode_str_len, kvm->events_ops->name); |
| pr_info("%10s ", "Samples"); |
| pr_info("%9s ", "Samples%"); |
| |
| pr_info("%9s ", "Time%"); |
| pr_info("%11s ", "Min Time"); |
| pr_info("%11s ", "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("%*s ", decode_str_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); |
| pr_info("%9.2fus ", (double)min / NSEC_PER_USEC); |
| pr_info("%9.2fus ", (double)max / NSEC_PER_USEC); |
| pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount / NSEC_PER_USEC, |
| 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 / (double)NSEC_PER_USEC); |
| |
| 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 evsel *evsel, |
| struct machine *machine) |
| { |
| int err = 0; |
| 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)) |
| err = -1; |
| |
| thread__put(thread); |
| return err; |
| } |
| |
| static int cpu_isa_config(struct perf_kvm_stat *kvm) |
| { |
| char buf[128], *cpuid; |
| int err; |
| |
| if (kvm->live) { |
| err = get_cpuid(buf, sizeof(buf)); |
| if (err != 0) { |
| pr_err("Failed to look up CPU type: %s\n", |
| str_error_r(err, buf, sizeof(buf))); |
| return -err; |
| } |
| cpuid = buf; |
| } else |
| cpuid = kvm->session->header.env.cpuid; |
| |
| if (!cpuid) { |
| pr_err("Failed to look up CPU type\n"); |
| return -EINVAL; |
| } |
| |
| err = cpu_isa_init(kvm, cpuid); |
| if (err == -ENOTSUP) |
| pr_err("CPU %s is not supported.\n", cpuid); |
| |
| return err; |
| } |
| |
| 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) |
| { |
| struct evlist *evlist = kvm->evlist; |
| union perf_event *event; |
| struct mmap *md; |
| u64 timestamp; |
| s64 n = 0; |
| int err; |
| |
| *mmap_time = ULLONG_MAX; |
| md = &evlist->mmap[idx]; |
| err = perf_mmap__read_init(&md->core); |
| if (err < 0) |
| return (err == -EAGAIN) ? 0 : -1; |
| |
| while ((event = perf_mmap__read_event(&md->core)) != NULL) { |
| err = evlist__parse_sample_timestamp(evlist, event, ×tamp); |
| 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, 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. |
| */ |
| perf_mmap__consume(&md->core); |
| |
| 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 = timestamp; |
| |
| /* limit events per mmap handled all at once */ |
| n++; |
| if (n == PERF_KVM__MAX_EVENTS_PER_MMAP) |
| break; |
| } |
| |
| perf_mmap__read_done(&md->core); |
| 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->core.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) { |
| struct ordered_events *oe = &kvm->session->ordered_events; |
| |
| oe->next_flush = flush_time; |
| err = ordered_events__flush(oe, OE_FLUSH__ROUND); |
| 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(void) |
| { |
| int c; |
| |
| c = getc(stdin); |
| if (c == 'q') |
| return 1; |
| |
| return 0; |
| } |
| |
| static int kvm_events_live_report(struct perf_kvm_stat *kvm) |
| { |
| int nr_stdin, ret, err = -EINVAL; |
| struct termios 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; |
| } |
| |
| set_term_quiet_input(&save); |
| init_kvm_event_record(kvm); |
| |
| signal(SIGINT, sig_handler); |
| signal(SIGTERM, sig_handler); |
| |
| /* add timer fd */ |
| if (perf_kvm__timerfd_create(kvm) < 0) { |
| err = -1; |
| goto out; |
| } |
| |
| if (evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0) |
| goto out; |
| |
| nr_stdin = evlist__add_pollfd(kvm->evlist, fileno(stdin)); |
| if (nr_stdin < 0) |
| goto out; |
| |
| if (fd_set_nonblock(fileno(stdin)) != 0) |
| goto out; |
| |
| /* everything is good - enable the events and process */ |
| evlist__enable(kvm->evlist); |
| |
| while (!done) { |
| struct fdarray *fda = &kvm->evlist->core.pollfd; |
| int rc; |
| |
| rc = perf_kvm__mmap_read(kvm); |
| if (rc < 0) |
| break; |
| |
| err = perf_kvm__handle_timerfd(kvm); |
| if (err) |
| goto out; |
| |
| if (fda->entries[nr_stdin].revents & POLLIN) |
| done = perf_kvm__handle_stdin(); |
| |
| if (!rc && !done) |
| err = evlist__poll(kvm->evlist, 100); |
| } |
| |
| evlist__disable(kvm->evlist); |
| |
| if (err == 0) { |
| sort_result(kvm); |
| print_result(kvm); |
| } |
| |
| out: |
| if (kvm->timerfd >= 0) |
| close(kvm->timerfd); |
| |
| tcsetattr(0, TCSAFLUSH, &save); |
| return err; |
| } |
| |
| static int kvm_live_open_events(struct perf_kvm_stat *kvm) |
| { |
| int err, rc = -1; |
| struct evsel *pos; |
| struct evlist *evlist = kvm->evlist; |
| char sbuf[STRERR_BUFSIZE]; |
| |
| evlist__config(evlist, &kvm->opts, NULL); |
| |
| /* |
| * Note: exclude_{guest,host} do not apply here. |
| * This command processes KVM tracepoints from host only |
| */ |
| evlist__for_each_entry(evlist, pos) { |
| struct perf_event_attr *attr = &pos->core.attr; |
| |
| /* make sure these *are* set */ |
| evsel__set_sample_bit(pos, TID); |
| evsel__set_sample_bit(pos, TIME); |
| evsel__set_sample_bit(pos, CPU); |
| evsel__set_sample_bit(pos, RAW); |
| /* make sure these are *not*; want as small a sample as possible */ |
| evsel__reset_sample_bit(pos, PERIOD); |
| evsel__reset_sample_bit(pos, IP); |
| evsel__reset_sample_bit(pos, CALLCHAIN); |
| evsel__reset_sample_bit(pos, ADDR); |
| 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 = evlist__open(evlist); |
| if (err < 0) { |
| printf("Couldn't create the events: %s\n", |
| str_error_r(errno, sbuf, sizeof(sbuf))); |
| goto out; |
| } |
| |
| if (evlist__mmap(evlist, kvm->opts.mmap_pages) < 0) { |
| ui__error("Failed to mmap the events: %s\n", |
| str_error_r(errno, sbuf, sizeof(sbuf))); |
| 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, |
| .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, &kvm->tool); |
| if (IS_ERR(kvm->session)) { |
| pr_err("Initializing perf session failed\n"); |
| return PTR_ERR(kvm->session); |
| } |
| |
| symbol__init(&kvm->session->header.env); |
| |
| if (!perf_session__has_traces(kvm->session, "kvm record")) { |
| ret = -EINVAL; |
| goto out_delete; |
| } |
| |
| /* |
| * 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) |
| goto out_delete; |
| |
| ret = perf_session__process_events(kvm->session); |
| |
| out_delete: |
| perf_session__delete(kvm->session); |
| return ret; |
| } |
| |
| static int parse_target_str(struct perf_kvm_stat *kvm) |
| { |
| if (kvm->opts.target.pid) { |
| kvm->pid_list = intlist__new(kvm->opts.target.pid); |
| 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; |
| } |
| |
| #define STRDUP_FAIL_EXIT(s) \ |
| ({ char *_p; \ |
| _p = strdup(s); \ |
| if (!_p) \ |
| return -ENOMEM; \ |
| _p; \ |
| }) |
| |
| int __weak setup_kvm_events_tp(struct perf_kvm_stat *kvm __maybe_unused) |
| { |
| return 0; |
| } |
| |
| static int |
| kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv) |
| { |
| unsigned int rec_argc, i, j, events_tp_size; |
| const char **rec_argv; |
| const char * const record_args[] = { |
| "record", |
| "-R", |
| "-m", "1024", |
| "-c", "1", |
| }; |
| const char * const kvm_stat_record_usage[] = { |
| "perf kvm stat record [<options>]", |
| NULL |
| }; |
| const char * const *events_tp; |
| int ret; |
| |
| events_tp_size = 0; |
| ret = setup_kvm_events_tp(kvm); |
| if (ret < 0) { |
| pr_err("Unable to setup the kvm tracepoints\n"); |
| return ret; |
| } |
| |
| for (events_tp = kvm_events_tp; *events_tp; events_tp++) |
| events_tp_size++; |
| |
| rec_argc = ARRAY_SIZE(record_args) + argc + 2 + |
| 2 * events_tp_size; |
| 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 < events_tp_size; 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]; |
| |
| set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN); |
| set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN); |
| set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN); |
| |
| set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED); |
| set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED); |
| |
| record_usage = kvm_stat_record_usage; |
| return cmd_record(i, rec_argv); |
| } |
| |
| 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 (x86 only), ioport (x86 only)"), |
| 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->opts.target.pid, "pid", |
| "analyze events only for given process id(s)"), |
| OPT_BOOLEAN('f', "force", &kvm->force, "don't complain, do it"), |
| OPT_END() |
| }; |
| |
| const char * const kvm_events_report_usage[] = { |
| "perf kvm stat report [<options>]", |
| NULL |
| }; |
| |
| 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); |
| } |
| |
| if (!kvm->opts.target.pid) |
| kvm->opts.target.system_wide = true; |
| |
| return kvm_events_report_vcpu(kvm); |
| } |
| |
| #ifdef HAVE_TIMERFD_SUPPORT |
| static struct evlist *kvm_live_event_list(void) |
| { |
| struct evlist *evlist; |
| char *tp, *name, *sys; |
| int err = -1; |
| const char * const *events_tp; |
| |
| evlist = evlist__new(); |
| if (evlist == NULL) |
| return NULL; |
| |
| for (events_tp = kvm_events_tp; *events_tp; events_tp++) { |
| |
| tp = strdup(*events_tp); |
| 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", |
| *events_tp); |
| free(tp); |
| goto out; |
| } |
| *name = '\0'; |
| name++; |
| |
| 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; |
| } |
| |
| free(tp); |
| } |
| |
| err = 0; |
| |
| out: |
| if (err) { |
| 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", 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 (x86 only), ioport (x86 only)"), |
| 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" |
| " HLT (x86 only) or Wait state (s390 only)" |
| " that take longer than duration usecs"), |
| OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, |
| "per thread proc mmap processing timeout in ms"), |
| OPT_END() |
| }; |
| const char * const live_usage[] = { |
| "perf kvm stat live [<options>]", |
| NULL |
| }; |
| struct perf_data data = { |
| .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.namespaces = perf_event__process_namespaces; |
| kvm->tool.ordered_events = 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(NULL); |
| disable_buildid_cache(); |
| |
| use_browser = 0; |
| |
| 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 |
| */ |
| err = setup_kvm_events_tp(kvm); |
| if (err < 0) { |
| pr_err("Unable to setup the kvm tracepoints\n"); |
| return err; |
| } |
| |
| kvm->evlist = kvm_live_event_list(); |
| if (kvm->evlist == NULL) { |
| err = -1; |
| goto out; |
| } |
| |
| 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, &kvm->tool); |
| if (IS_ERR(kvm->session)) { |
| err = PTR_ERR(kvm->session); |
| goto out; |
| } |
| kvm->session->evlist = kvm->evlist; |
| 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, true, false, 1); |
| err = kvm_live_open_events(kvm); |
| if (err) |
| goto out; |
| |
| err = kvm_events_live_report(kvm); |
| |
| out: |
| perf_session__delete(kvm->session); |
| kvm->session = NULL; |
| 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", |
| |
| }; |
| |
| if (argc == 1) { |
| print_kvm_stat_usage(); |
| goto perf_stat; |
| } |
| |
| if (strlen(argv[1]) > 2 && strstarts("record", argv[1])) |
| return kvm_events_record(&kvm, argc - 1, argv + 1); |
| |
| if (strlen(argv[1]) > 2 && strstarts("report", argv[1])) |
| 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); |
| } |
| #endif /* HAVE_KVM_STAT_SUPPORT */ |
| |
| int __weak kvm_add_default_arch_event(int *argc __maybe_unused, |
| const char **argv __maybe_unused) |
| { |
| return 0; |
| } |
| |
| static int __cmd_record(const char *file_name, int argc, const char **argv) |
| { |
| int rec_argc, i = 0, j, ret; |
| const char **rec_argv; |
| |
| ret = kvm_add_default_arch_event(&argc, argv); |
| if (ret) |
| return -EINVAL; |
| |
| 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); |
| } |
| |
| 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); |
| } |
| |
| 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); |
| } |
| |
| int cmd_kvm(int argc, const char **argv) |
| { |
| 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_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() |
| }; |
| |
| const char *const kvm_subcommands[] = { "top", "record", "report", "diff", |
| "buildid-list", "stat", NULL }; |
| const char *kvm_usage[] = { NULL, NULL }; |
| |
| 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); |
| |
| if (!perf_host) |
| perf_guest = 1; |
| |
| if (!file_name) { |
| file_name = get_filename_for_perf_kvm(); |
| |
| if (!file_name) { |
| pr_err("Failed to allocate memory for filename\n"); |
| return -ENOMEM; |
| } |
| } |
| |
| if (strlen(argv[0]) > 2 && strstarts("record", argv[0])) |
| return __cmd_record(file_name, argc, argv); |
| else if (strlen(argv[0]) > 2 && strstarts("report", argv[0])) |
| return __cmd_report(file_name, argc, argv); |
| else if (strlen(argv[0]) > 2 && strstarts("diff", argv[0])) |
| return cmd_diff(argc, argv); |
| else if (!strcmp(argv[0], "top")) |
| return cmd_top(argc, argv); |
| 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 (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); |
| |
| return 0; |
| } |