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1652 lines
38 KiB
1652 lines
38 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include "builtin.h" |
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#include "perf.h" |
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|
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#include "util/build-id.h" |
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#include "util/evsel.h" |
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#include "util/evlist.h" |
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#include "util/mmap.h" |
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#include "util/term.h" |
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#include "util/symbol.h" |
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#include "util/thread.h" |
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#include "util/header.h" |
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#include "util/session.h" |
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#include "util/intlist.h" |
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#include <subcmd/pager.h> |
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#include <subcmd/parse-options.h> |
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#include "util/trace-event.h" |
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#include "util/debug.h" |
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#include "util/tool.h" |
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#include "util/stat.h" |
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#include "util/synthetic-events.h" |
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#include "util/top.h" |
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#include "util/data.h" |
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#include "util/ordered-events.h" |
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#include "util/kvm-stat.h" |
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#include "ui/ui.h" |
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|
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#include <sys/prctl.h> |
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#ifdef HAVE_TIMERFD_SUPPORT |
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#include <sys/timerfd.h> |
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#endif |
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#include <sys/time.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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|
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#include <linux/err.h> |
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#include <linux/kernel.h> |
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#include <linux/string.h> |
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#include <linux/time64.h> |
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#include <linux/zalloc.h> |
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#include <errno.h> |
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#include <inttypes.h> |
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#include <poll.h> |
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#include <termios.h> |
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#include <semaphore.h> |
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#include <signal.h> |
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#include <math.h> |
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#include <perf/mmap.h> |
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|
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static const char *get_filename_for_perf_kvm(void) |
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{ |
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const char *filename; |
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|
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if (perf_host && !perf_guest) |
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filename = strdup("perf.data.host"); |
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else if (!perf_host && perf_guest) |
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filename = strdup("perf.data.guest"); |
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else |
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filename = strdup("perf.data.kvm"); |
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return filename; |
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} |
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#ifdef HAVE_KVM_STAT_SUPPORT |
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void exit_event_get_key(struct evsel *evsel, |
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struct perf_sample *sample, |
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struct event_key *key) |
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{ |
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key->info = 0; |
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key->key = evsel__intval(evsel, sample, kvm_exit_reason); |
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} |
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bool kvm_exit_event(struct evsel *evsel) |
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{ |
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return !strcmp(evsel->name, kvm_exit_trace); |
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} |
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bool exit_event_begin(struct evsel *evsel, |
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struct perf_sample *sample, struct event_key *key) |
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{ |
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if (kvm_exit_event(evsel)) { |
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exit_event_get_key(evsel, sample, key); |
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return true; |
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} |
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return false; |
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} |
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bool kvm_entry_event(struct evsel *evsel) |
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{ |
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return !strcmp(evsel->name, kvm_entry_trace); |
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} |
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bool exit_event_end(struct evsel *evsel, |
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struct perf_sample *sample __maybe_unused, |
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struct event_key *key __maybe_unused) |
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{ |
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return kvm_entry_event(evsel); |
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} |
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static const char *get_exit_reason(struct perf_kvm_stat *kvm, |
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struct exit_reasons_table *tbl, |
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u64 exit_code) |
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{ |
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while (tbl->reason != NULL) { |
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if (tbl->exit_code == exit_code) |
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return tbl->reason; |
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tbl++; |
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} |
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pr_err("unknown kvm exit code:%lld on %s\n", |
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(unsigned long long)exit_code, kvm->exit_reasons_isa); |
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return "UNKNOWN"; |
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} |
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void exit_event_decode_key(struct perf_kvm_stat *kvm, |
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struct event_key *key, |
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char *decode) |
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{ |
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const char *exit_reason = get_exit_reason(kvm, key->exit_reasons, |
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key->key); |
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scnprintf(decode, decode_str_len, "%s", exit_reason); |
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} |
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static bool register_kvm_events_ops(struct perf_kvm_stat *kvm) |
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{ |
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struct kvm_reg_events_ops *events_ops = kvm_reg_events_ops; |
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|
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for (events_ops = kvm_reg_events_ops; events_ops->name; events_ops++) { |
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if (!strcmp(events_ops->name, kvm->report_event)) { |
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kvm->events_ops = events_ops->ops; |
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return true; |
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} |
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} |
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return false; |
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} |
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struct vcpu_event_record { |
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int vcpu_id; |
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u64 start_time; |
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struct kvm_event *last_event; |
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}; |
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static void init_kvm_event_record(struct perf_kvm_stat *kvm) |
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{ |
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unsigned int i; |
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for (i = 0; i < EVENTS_CACHE_SIZE; i++) |
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INIT_LIST_HEAD(&kvm->kvm_events_cache[i]); |
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} |
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#ifdef HAVE_TIMERFD_SUPPORT |
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static void clear_events_cache_stats(struct list_head *kvm_events_cache) |
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{ |
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struct list_head *head; |
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struct kvm_event *event; |
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unsigned int i; |
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int j; |
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for (i = 0; i < EVENTS_CACHE_SIZE; i++) { |
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head = &kvm_events_cache[i]; |
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list_for_each_entry(event, head, hash_entry) { |
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/* reset stats for event */ |
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event->total.time = 0; |
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init_stats(&event->total.stats); |
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for (j = 0; j < event->max_vcpu; ++j) { |
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event->vcpu[j].time = 0; |
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init_stats(&event->vcpu[j].stats); |
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} |
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} |
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} |
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} |
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#endif |
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static int kvm_events_hash_fn(u64 key) |
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{ |
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return key & (EVENTS_CACHE_SIZE - 1); |
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} |
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static bool kvm_event_expand(struct kvm_event *event, int vcpu_id) |
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{ |
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int old_max_vcpu = event->max_vcpu; |
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void *prev; |
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if (vcpu_id < event->max_vcpu) |
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return true; |
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while (event->max_vcpu <= vcpu_id) |
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event->max_vcpu += DEFAULT_VCPU_NUM; |
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prev = event->vcpu; |
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event->vcpu = realloc(event->vcpu, |
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event->max_vcpu * sizeof(*event->vcpu)); |
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if (!event->vcpu) { |
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free(prev); |
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pr_err("Not enough memory\n"); |
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return false; |
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} |
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memset(event->vcpu + old_max_vcpu, 0, |
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(event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu)); |
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return true; |
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} |
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static struct kvm_event *kvm_alloc_init_event(struct event_key *key) |
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{ |
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struct kvm_event *event; |
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event = zalloc(sizeof(*event)); |
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if (!event) { |
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pr_err("Not enough memory\n"); |
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return NULL; |
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} |
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event->key = *key; |
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init_stats(&event->total.stats); |
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return event; |
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} |
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static struct kvm_event *find_create_kvm_event(struct perf_kvm_stat *kvm, |
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struct event_key *key) |
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{ |
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struct kvm_event *event; |
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struct list_head *head; |
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BUG_ON(key->key == INVALID_KEY); |
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head = &kvm->kvm_events_cache[kvm_events_hash_fn(key->key)]; |
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list_for_each_entry(event, head, hash_entry) { |
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if (event->key.key == key->key && event->key.info == key->info) |
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return event; |
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} |
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event = kvm_alloc_init_event(key); |
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if (!event) |
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return NULL; |
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list_add(&event->hash_entry, head); |
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return event; |
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} |
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static bool handle_begin_event(struct perf_kvm_stat *kvm, |
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struct vcpu_event_record *vcpu_record, |
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struct event_key *key, u64 timestamp) |
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{ |
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struct kvm_event *event = NULL; |
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if (key->key != INVALID_KEY) |
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event = find_create_kvm_event(kvm, key); |
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vcpu_record->last_event = event; |
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vcpu_record->start_time = timestamp; |
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return true; |
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} |
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static void |
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kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff) |
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{ |
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kvm_stats->time += time_diff; |
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update_stats(&kvm_stats->stats, time_diff); |
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} |
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static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event) |
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{ |
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struct kvm_event_stats *kvm_stats = &event->total; |
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if (vcpu_id != -1) |
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kvm_stats = &event->vcpu[vcpu_id]; |
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return rel_stddev_stats(stddev_stats(&kvm_stats->stats), |
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avg_stats(&kvm_stats->stats)); |
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} |
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static bool update_kvm_event(struct kvm_event *event, int vcpu_id, |
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u64 time_diff) |
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{ |
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if (vcpu_id == -1) { |
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kvm_update_event_stats(&event->total, time_diff); |
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return true; |
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} |
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if (!kvm_event_expand(event, vcpu_id)) |
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return false; |
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kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff); |
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return true; |
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} |
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static bool is_child_event(struct perf_kvm_stat *kvm, |
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struct evsel *evsel, |
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struct perf_sample *sample, |
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struct event_key *key) |
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{ |
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struct child_event_ops *child_ops; |
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child_ops = kvm->events_ops->child_ops; |
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if (!child_ops) |
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return false; |
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for (; child_ops->name; child_ops++) { |
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if (!strcmp(evsel->name, child_ops->name)) { |
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child_ops->get_key(evsel, sample, key); |
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return true; |
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} |
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} |
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return false; |
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} |
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static bool handle_child_event(struct perf_kvm_stat *kvm, |
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struct vcpu_event_record *vcpu_record, |
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struct event_key *key, |
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struct perf_sample *sample __maybe_unused) |
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{ |
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struct kvm_event *event = NULL; |
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if (key->key != INVALID_KEY) |
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event = find_create_kvm_event(kvm, key); |
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vcpu_record->last_event = event; |
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return true; |
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} |
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static bool skip_event(const char *event) |
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{ |
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const char * const *skip_events; |
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for (skip_events = kvm_skip_events; *skip_events; skip_events++) |
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if (!strcmp(event, *skip_events)) |
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return true; |
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return false; |
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} |
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static bool handle_end_event(struct perf_kvm_stat *kvm, |
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struct vcpu_event_record *vcpu_record, |
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struct event_key *key, |
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struct perf_sample *sample) |
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{ |
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struct kvm_event *event; |
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u64 time_begin, time_diff; |
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int vcpu; |
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if (kvm->trace_vcpu == -1) |
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vcpu = -1; |
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else |
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vcpu = vcpu_record->vcpu_id; |
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event = vcpu_record->last_event; |
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time_begin = vcpu_record->start_time; |
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/* The begin event is not caught. */ |
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if (!time_begin) |
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return true; |
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/* |
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* In some case, the 'begin event' only records the start timestamp, |
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* the actual event is recognized in the 'end event' (e.g. mmio-event). |
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*/ |
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/* Both begin and end events did not get the key. */ |
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if (!event && key->key == INVALID_KEY) |
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return true; |
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if (!event) |
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event = find_create_kvm_event(kvm, key); |
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if (!event) |
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return false; |
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vcpu_record->last_event = NULL; |
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vcpu_record->start_time = 0; |
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/* seems to happen once in a while during live mode */ |
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if (sample->time < time_begin) { |
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pr_debug("End time before begin time; skipping event.\n"); |
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return true; |
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} |
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time_diff = sample->time - time_begin; |
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if (kvm->duration && time_diff > kvm->duration) { |
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char decode[decode_str_len]; |
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kvm->events_ops->decode_key(kvm, &event->key, decode); |
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if (!skip_event(decode)) { |
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pr_info("%" PRIu64 " VM %d, vcpu %d: %s event took %" PRIu64 "usec\n", |
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sample->time, sample->pid, vcpu_record->vcpu_id, |
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decode, time_diff / NSEC_PER_USEC); |
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} |
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} |
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return update_kvm_event(event, vcpu, time_diff); |
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} |
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static |
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struct vcpu_event_record *per_vcpu_record(struct thread *thread, |
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struct evsel *evsel, |
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struct perf_sample *sample) |
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{ |
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/* Only kvm_entry records vcpu id. */ |
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if (!thread__priv(thread) && kvm_entry_event(evsel)) { |
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struct vcpu_event_record *vcpu_record; |
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vcpu_record = zalloc(sizeof(*vcpu_record)); |
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if (!vcpu_record) { |
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pr_err("%s: Not enough memory\n", __func__); |
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return NULL; |
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} |
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vcpu_record->vcpu_id = evsel__intval(evsel, sample, vcpu_id_str); |
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thread__set_priv(thread, vcpu_record); |
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} |
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return thread__priv(thread); |
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} |
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static bool handle_kvm_event(struct perf_kvm_stat *kvm, |
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struct thread *thread, |
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struct evsel *evsel, |
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struct perf_sample *sample) |
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{ |
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struct vcpu_event_record *vcpu_record; |
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struct event_key key = { .key = INVALID_KEY, |
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.exit_reasons = kvm->exit_reasons }; |
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vcpu_record = per_vcpu_record(thread, evsel, sample); |
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if (!vcpu_record) |
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return true; |
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|
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/* only process events for vcpus user cares about */ |
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if ((kvm->trace_vcpu != -1) && |
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(kvm->trace_vcpu != vcpu_record->vcpu_id)) |
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return true; |
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if (kvm->events_ops->is_begin_event(evsel, sample, &key)) |
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return handle_begin_event(kvm, vcpu_record, &key, sample->time); |
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if (is_child_event(kvm, evsel, sample, &key)) |
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return handle_child_event(kvm, vcpu_record, &key, sample); |
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if (kvm->events_ops->is_end_event(evsel, sample, &key)) |
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return handle_end_event(kvm, vcpu_record, &key, sample); |
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return true; |
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} |
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#define GET_EVENT_KEY(func, field) \ |
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static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \ |
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{ \ |
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if (vcpu == -1) \ |
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return event->total.field; \ |
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\ |
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if (vcpu >= event->max_vcpu) \ |
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return 0; \ |
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\ |
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return event->vcpu[vcpu].field; \ |
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} |
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#define COMPARE_EVENT_KEY(func, field) \ |
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GET_EVENT_KEY(func, field) \ |
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static int compare_kvm_event_ ## func(struct kvm_event *one, \ |
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struct kvm_event *two, int vcpu)\ |
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{ \ |
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return get_event_ ##func(one, vcpu) > \ |
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get_event_ ##func(two, vcpu); \ |
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} |
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GET_EVENT_KEY(time, time); |
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COMPARE_EVENT_KEY(count, stats.n); |
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COMPARE_EVENT_KEY(mean, stats.mean); |
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GET_EVENT_KEY(max, stats.max); |
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GET_EVENT_KEY(min, stats.min); |
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|
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#define DEF_SORT_NAME_KEY(name, compare_key) \ |
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{ #name, compare_kvm_event_ ## compare_key } |
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|
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static struct kvm_event_key keys[] = { |
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DEF_SORT_NAME_KEY(sample, count), |
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DEF_SORT_NAME_KEY(time, mean), |
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{ NULL, NULL } |
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}; |
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static bool select_key(struct perf_kvm_stat *kvm) |
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{ |
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int i; |
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|
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for (i = 0; keys[i].name; i++) { |
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if (!strcmp(keys[i].name, kvm->sort_key)) { |
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kvm->compare = keys[i].key; |
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return true; |
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} |
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} |
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|
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pr_err("Unknown compare key:%s\n", kvm->sort_key); |
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return false; |
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} |
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|
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static void insert_to_result(struct rb_root *result, struct kvm_event *event, |
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key_cmp_fun bigger, int vcpu) |
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{ |
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struct rb_node **rb = &result->rb_node; |
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struct rb_node *parent = NULL; |
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struct kvm_event *p; |
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|
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while (*rb) { |
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p = container_of(*rb, struct kvm_event, rb); |
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parent = *rb; |
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|
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if (bigger(event, p, vcpu)) |
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rb = &(*rb)->rb_left; |
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else |
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rb = &(*rb)->rb_right; |
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} |
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|
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rb_link_node(&event->rb, parent, rb); |
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rb_insert_color(&event->rb, result); |
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} |
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|
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static void |
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update_total_count(struct perf_kvm_stat *kvm, struct kvm_event *event) |
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{ |
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int vcpu = kvm->trace_vcpu; |
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|
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kvm->total_count += get_event_count(event, vcpu); |
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kvm->total_time += get_event_time(event, vcpu); |
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} |
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|
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static bool event_is_valid(struct kvm_event *event, int vcpu) |
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{ |
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return !!get_event_count(event, vcpu); |
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} |
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|
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static void sort_result(struct perf_kvm_stat *kvm) |
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{ |
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unsigned int i; |
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int vcpu = kvm->trace_vcpu; |
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struct kvm_event *event; |
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|
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for (i = 0; i < EVENTS_CACHE_SIZE; i++) { |
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list_for_each_entry(event, &kvm->kvm_events_cache[i], hash_entry) { |
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if (event_is_valid(event, vcpu)) { |
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update_total_count(kvm, event); |
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insert_to_result(&kvm->result, event, |
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kvm->compare, vcpu); |
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} |
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} |
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} |
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} |
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|
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/* returns left most element of result, and erase it */ |
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static struct kvm_event *pop_from_result(struct rb_root *result) |
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{ |
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struct rb_node *node = rb_first(result); |
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|
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if (!node) |
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return NULL; |
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|
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rb_erase(node, result); |
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return container_of(node, struct kvm_event, rb); |
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} |
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|
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static void print_vcpu_info(struct perf_kvm_stat *kvm) |
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{ |
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int vcpu = kvm->trace_vcpu; |
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|
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pr_info("Analyze events for "); |
|
|
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if (kvm->opts.target.system_wide) |
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pr_info("all VMs, "); |
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else if (kvm->opts.target.pid) |
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pr_info("pid(s) %s, ", kvm->opts.target.pid); |
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else |
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pr_info("dazed and confused on what is monitored, "); |
|
|
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if (vcpu == -1) |
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pr_info("all VCPUs:\n\n"); |
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else |
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pr_info("VCPU %d:\n\n", vcpu); |
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} |
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|
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static void show_timeofday(void) |
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{ |
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char date[64]; |
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struct timeval tv; |
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struct tm ltime; |
|
|
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gettimeofday(&tv, NULL); |
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if (localtime_r(&tv.tv_sec, <ime)) { |
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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); |
|
/* |
|
* 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, false, &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, false, &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, 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 (!strncmp(argv[1], "rec", 3)) |
|
return kvm_events_record(&kvm, argc - 1, argv + 1); |
|
|
|
if (!strncmp(argv[1], "rep", 3)) |
|
return kvm_events_report(&kvm, argc - 1 , argv + 1); |
|
|
|
#ifdef HAVE_TIMERFD_SUPPORT |
|
if (!strncmp(argv[1], "live", 4)) |
|
return kvm_events_live(&kvm, argc - 1 , argv + 1); |
|
#endif |
|
|
|
perf_stat: |
|
return cmd_stat(argc, argv); |
|
} |
|
#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_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 (!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); |
|
else if (!strncmp(argv[0], "top", 3)) |
|
return cmd_top(argc, argv); |
|
else if (!strncmp(argv[0], "buildid-list", 12)) |
|
return __cmd_buildid_list(file_name, argc, argv); |
|
#ifdef HAVE_KVM_STAT_SUPPORT |
|
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; |
|
}
|
|
|