// SPDX-License-Identifier: GPL-2.0-only /* * builtin-stat.c * * Builtin stat command: Give a precise performance counters summary * overview about any workload, CPU or specific PID. * * Sample output: $ perf stat ./hackbench 10 Time: 0.118 Performance counter stats for './hackbench 10': 1708.761321 task-clock # 11.037 CPUs utilized 41,190 context-switches # 0.024 M/sec 6,735 CPU-migrations # 0.004 M/sec 17,318 page-faults # 0.010 M/sec 5,205,202,243 cycles # 3.046 GHz 3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle 1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle 2,603,501,247 instructions # 0.50 insns per cycle # 1.48 stalled cycles per insn 484,357,498 branches # 283.455 M/sec 6,388,934 branch-misses # 1.32% of all branches 0.154822978 seconds time elapsed * * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar * * Improvements and fixes by: * * Arjan van de Ven * Yanmin Zhang * Wu Fengguang * Mike Galbraith * Paul Mackerras * Jaswinder Singh Rajput */ #include "builtin.h" #include "perf.h" #include "util/cgroup.h" #include #include "util/parse-events.h" #include "util/pmu.h" #include "util/event.h" #include "util/evlist.h" #include "util/evsel.h" #include "util/debug.h" #include "util/color.h" #include "util/stat.h" #include "util/header.h" #include "util/cpumap.h" #include "util/thread.h" #include "util/thread_map.h" #include "util/counts.h" #include "util/group.h" #include "util/session.h" #include "util/tool.h" #include "util/string2.h" #include "util/metricgroup.h" #include "util/target.h" #include "util/time-utils.h" #include "util/top.h" #include "asm/bug.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DEFAULT_SEPARATOR " " #define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi" static void print_counters(struct timespec *ts, int argc, const char **argv); /* Default events used for perf stat -T */ static const char *transaction_attrs = { "task-clock," "{" "instructions," "cycles," "cpu/cycles-t/," "cpu/tx-start/," "cpu/el-start/," "cpu/cycles-ct/" "}" }; /* More limited version when the CPU does not have all events. */ static const char * transaction_limited_attrs = { "task-clock," "{" "instructions," "cycles," "cpu/cycles-t/," "cpu/tx-start/" "}" }; static const char * topdown_attrs[] = { "topdown-total-slots", "topdown-slots-retired", "topdown-recovery-bubbles", "topdown-fetch-bubbles", "topdown-slots-issued", NULL, }; static const char *smi_cost_attrs = { "{" "msr/aperf/," "msr/smi/," "cycles" "}" }; static struct evlist *evsel_list; static struct target target = { .uid = UINT_MAX, }; #define METRIC_ONLY_LEN 20 static volatile pid_t child_pid = -1; static int detailed_run = 0; static bool transaction_run; static bool topdown_run = false; static bool smi_cost = false; static bool smi_reset = false; static int big_num_opt = -1; static bool group = false; static const char *pre_cmd = NULL; static const char *post_cmd = NULL; static bool sync_run = false; static bool forever = false; static bool force_metric_only = false; static struct timespec ref_time; static bool append_file; static bool interval_count; static const char *output_name; static int output_fd; struct perf_stat { bool record; struct perf_data data; struct perf_session *session; u64 bytes_written; struct perf_tool tool; bool maps_allocated; struct perf_cpu_map *cpus; struct perf_thread_map *threads; enum aggr_mode aggr_mode; }; static struct perf_stat perf_stat; #define STAT_RECORD perf_stat.record static volatile int done = 0; static struct perf_stat_config stat_config = { .aggr_mode = AGGR_GLOBAL, .scale = true, .unit_width = 4, /* strlen("unit") */ .run_count = 1, .metric_only_len = METRIC_ONLY_LEN, .walltime_nsecs_stats = &walltime_nsecs_stats, .big_num = true, }; static inline void diff_timespec(struct timespec *r, struct timespec *a, struct timespec *b) { r->tv_sec = a->tv_sec - b->tv_sec; if (a->tv_nsec < b->tv_nsec) { r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec; r->tv_sec--; } else { r->tv_nsec = a->tv_nsec - b->tv_nsec ; } } static void perf_stat__reset_stats(void) { int i; perf_evlist__reset_stats(evsel_list); perf_stat__reset_shadow_stats(); for (i = 0; i < stat_config.stats_num; i++) perf_stat__reset_shadow_per_stat(&stat_config.stats[i]); } static int process_synthesized_event(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample __maybe_unused, struct machine *machine __maybe_unused) { if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) { pr_err("failed to write perf data, error: %m\n"); return -1; } perf_stat.bytes_written += event->header.size; return 0; } static int write_stat_round_event(u64 tm, u64 type) { return perf_event__synthesize_stat_round(NULL, tm, type, process_synthesized_event, NULL); } #define WRITE_STAT_ROUND_EVENT(time, interval) \ write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval) #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) static int perf_evsel__write_stat_event(struct evsel *counter, u32 cpu, u32 thread, struct perf_counts_values *count) { struct perf_sample_id *sid = SID(counter, cpu, thread); return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count, process_synthesized_event, NULL); } static int read_single_counter(struct evsel *counter, int cpu, int thread, struct timespec *rs) { if (counter->tool_event == PERF_TOOL_DURATION_TIME) { u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL; struct perf_counts_values *count = perf_counts(counter->counts, cpu, thread); count->ena = count->run = val; count->val = val; return 0; } return perf_evsel__read_counter(counter, cpu, thread); } /* * Read out the results of a single counter: * do not aggregate counts across CPUs in system-wide mode */ static int read_counter(struct evsel *counter, struct timespec *rs) { int nthreads = perf_thread_map__nr(evsel_list->core.threads); int ncpus, cpu, thread; if (target__has_cpu(&target) && !target__has_per_thread(&target)) ncpus = perf_evsel__nr_cpus(counter); else ncpus = 1; if (!counter->supported) return -ENOENT; if (counter->system_wide) nthreads = 1; for (thread = 0; thread < nthreads; thread++) { for (cpu = 0; cpu < ncpus; cpu++) { struct perf_counts_values *count; count = perf_counts(counter->counts, cpu, thread); /* * The leader's group read loads data into its group members * (via perf_evsel__read_counter) and sets threir count->loaded. */ if (!perf_counts__is_loaded(counter->counts, cpu, thread) && read_single_counter(counter, cpu, thread, rs)) { counter->counts->scaled = -1; perf_counts(counter->counts, cpu, thread)->ena = 0; perf_counts(counter->counts, cpu, thread)->run = 0; return -1; } perf_counts__set_loaded(counter->counts, cpu, thread, false); if (STAT_RECORD) { if (perf_evsel__write_stat_event(counter, cpu, thread, count)) { pr_err("failed to write stat event\n"); return -1; } } if (verbose > 1) { fprintf(stat_config.output, "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n", perf_evsel__name(counter), cpu, count->val, count->ena, count->run); } } } return 0; } static void read_counters(struct timespec *rs) { struct evsel *counter; int ret; evlist__for_each_entry(evsel_list, counter) { ret = read_counter(counter, rs); if (ret) pr_debug("failed to read counter %s\n", counter->name); if (ret == 0 && perf_stat_process_counter(&stat_config, counter)) pr_warning("failed to process counter %s\n", counter->name); } } static void process_interval(void) { struct timespec ts, rs; clock_gettime(CLOCK_MONOTONIC, &ts); diff_timespec(&rs, &ts, &ref_time); read_counters(&rs); if (STAT_RECORD) { if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL)) pr_err("failed to write stat round event\n"); } init_stats(&walltime_nsecs_stats); update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000); print_counters(&rs, 0, NULL); } static void enable_counters(void) { if (stat_config.initial_delay) usleep(stat_config.initial_delay * USEC_PER_MSEC); /* * We need to enable counters only if: * - we don't have tracee (attaching to task or cpu) * - we have initial delay configured */ if (!target__none(&target) || stat_config.initial_delay) evlist__enable(evsel_list); } static void disable_counters(void) { /* * If we don't have tracee (attaching to task or cpu), counters may * still be running. To get accurate group ratios, we must stop groups * from counting before reading their constituent counters. */ if (!target__none(&target)) evlist__disable(evsel_list); } static volatile int workload_exec_errno; /* * perf_evlist__prepare_workload will send a SIGUSR1 * if the fork fails, since we asked by setting its * want_signal to true. */ static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info, void *ucontext __maybe_unused) { workload_exec_errno = info->si_value.sival_int; } static bool perf_evsel__should_store_id(struct evsel *counter) { return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID; } static bool is_target_alive(struct target *_target, struct perf_thread_map *threads) { struct stat st; int i; if (!target__has_task(_target)) return true; for (i = 0; i < threads->nr; i++) { char path[PATH_MAX]; scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(), threads->map[i].pid); if (!stat(path, &st)) return true; } return false; } static int __run_perf_stat(int argc, const char **argv, int run_idx) { int interval = stat_config.interval; int times = stat_config.times; int timeout = stat_config.timeout; char msg[BUFSIZ]; unsigned long long t0, t1; struct evsel *counter; struct timespec ts; size_t l; int status = 0; const bool forks = (argc > 0); bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false; if (interval) { ts.tv_sec = interval / USEC_PER_MSEC; ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC; } else if (timeout) { ts.tv_sec = timeout / USEC_PER_MSEC; ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC; } else { ts.tv_sec = 1; ts.tv_nsec = 0; } if (forks) { if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe, workload_exec_failed_signal) < 0) { perror("failed to prepare workload"); return -1; } child_pid = evsel_list->workload.pid; } if (group) perf_evlist__set_leader(evsel_list); evlist__for_each_entry(evsel_list, counter) { try_again: if (create_perf_stat_counter(counter, &stat_config, &target) < 0) { /* Weak group failed. Reset the group. */ if ((errno == EINVAL || errno == EBADF) && counter->leader != counter && counter->weak_group) { counter = perf_evlist__reset_weak_group(evsel_list, counter); goto try_again; } /* * PPC returns ENXIO for HW counters until 2.6.37 * (behavior changed with commit b0a873e). */ if (errno == EINVAL || errno == ENOSYS || errno == ENOENT || errno == EOPNOTSUPP || errno == ENXIO) { if (verbose > 0) ui__warning("%s event is not supported by the kernel.\n", perf_evsel__name(counter)); counter->supported = false; if ((counter->leader != counter) || !(counter->leader->core.nr_members > 1)) continue; } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) { if (verbose > 0) ui__warning("%s\n", msg); goto try_again; } else if (target__has_per_thread(&target) && evsel_list->core.threads && evsel_list->core.threads->err_thread != -1) { /* * For global --per-thread case, skip current * error thread. */ if (!thread_map__remove(evsel_list->core.threads, evsel_list->core.threads->err_thread)) { evsel_list->core.threads->err_thread = -1; goto try_again; } } perf_evsel__open_strerror(counter, &target, errno, msg, sizeof(msg)); ui__error("%s\n", msg); if (child_pid != -1) kill(child_pid, SIGTERM); return -1; } counter->supported = true; l = strlen(counter->unit); if (l > stat_config.unit_width) stat_config.unit_width = l; if (perf_evsel__should_store_id(counter) && perf_evsel__store_ids(counter, evsel_list)) return -1; } if (perf_evlist__apply_filters(evsel_list, &counter)) { pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", counter->filter, perf_evsel__name(counter), errno, str_error_r(errno, msg, sizeof(msg))); return -1; } if (STAT_RECORD) { int err, fd = perf_data__fd(&perf_stat.data); if (is_pipe) { err = perf_header__write_pipe(perf_data__fd(&perf_stat.data)); } else { err = perf_session__write_header(perf_stat.session, evsel_list, fd, false); } if (err < 0) return err; err = perf_stat_synthesize_config(&stat_config, NULL, evsel_list, process_synthesized_event, is_pipe); if (err < 0) return err; } /* * Enable counters and exec the command: */ t0 = rdclock(); clock_gettime(CLOCK_MONOTONIC, &ref_time); if (forks) { perf_evlist__start_workload(evsel_list); enable_counters(); if (interval || timeout) { while (!waitpid(child_pid, &status, WNOHANG)) { nanosleep(&ts, NULL); if (timeout) break; process_interval(); if (interval_count && !(--times)) break; } } if (child_pid != -1) wait4(child_pid, &status, 0, &stat_config.ru_data); if (workload_exec_errno) { const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); pr_err("Workload failed: %s\n", emsg); return -1; } if (WIFSIGNALED(status)) psignal(WTERMSIG(status), argv[0]); } else { enable_counters(); while (!done) { nanosleep(&ts, NULL); if (!is_target_alive(&target, evsel_list->core.threads)) break; if (timeout) break; if (interval) { process_interval(); if (interval_count && !(--times)) break; } } } disable_counters(); t1 = rdclock(); if (stat_config.walltime_run_table) stat_config.walltime_run[run_idx] = t1 - t0; update_stats(&walltime_nsecs_stats, t1 - t0); /* * Closing a group leader splits the group, and as we only disable * group leaders, results in remaining events becoming enabled. To * avoid arbitrary skew, we must read all counters before closing any * group leaders. */ read_counters(&(struct timespec) { .tv_nsec = t1-t0 }); /* * We need to keep evsel_list alive, because it's processed * later the evsel_list will be closed after. */ if (!STAT_RECORD) evlist__close(evsel_list); return WEXITSTATUS(status); } static int run_perf_stat(int argc, const char **argv, int run_idx) { int ret; if (pre_cmd) { ret = system(pre_cmd); if (ret) return ret; } if (sync_run) sync(); ret = __run_perf_stat(argc, argv, run_idx); if (ret) return ret; if (post_cmd) { ret = system(post_cmd); if (ret) return ret; } return ret; } static void print_counters(struct timespec *ts, int argc, const char **argv) { /* Do not print anything if we record to the pipe. */ if (STAT_RECORD && perf_stat.data.is_pipe) return; perf_evlist__print_counters(evsel_list, &stat_config, &target, ts, argc, argv); } static volatile int signr = -1; static void skip_signal(int signo) { if ((child_pid == -1) || stat_config.interval) done = 1; signr = signo; /* * render child_pid harmless * won't send SIGTERM to a random * process in case of race condition * and fast PID recycling */ child_pid = -1; } static void sig_atexit(void) { sigset_t set, oset; /* * avoid race condition with SIGCHLD handler * in skip_signal() which is modifying child_pid * goal is to avoid send SIGTERM to a random * process */ sigemptyset(&set); sigaddset(&set, SIGCHLD); sigprocmask(SIG_BLOCK, &set, &oset); if (child_pid != -1) kill(child_pid, SIGTERM); sigprocmask(SIG_SETMASK, &oset, NULL); if (signr == -1) return; signal(signr, SIG_DFL); kill(getpid(), signr); } static int stat__set_big_num(const struct option *opt __maybe_unused, const char *s __maybe_unused, int unset) { big_num_opt = unset ? 0 : 1; return 0; } static int enable_metric_only(const struct option *opt __maybe_unused, const char *s __maybe_unused, int unset) { force_metric_only = true; stat_config.metric_only = !unset; return 0; } static int parse_metric_groups(const struct option *opt, const char *str, int unset __maybe_unused) { return metricgroup__parse_groups(opt, str, &stat_config.metric_events); } static struct option stat_options[] = { OPT_BOOLEAN('T', "transaction", &transaction_run, "hardware transaction statistics"), OPT_CALLBACK('e', "event", &evsel_list, "event", "event selector. use 'perf list' to list available events", parse_events_option), OPT_CALLBACK(0, "filter", &evsel_list, "filter", "event filter", parse_filter), OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit, "child tasks do not inherit counters"), OPT_STRING('p', "pid", &target.pid, "pid", "stat events on existing process id"), OPT_STRING('t', "tid", &target.tid, "tid", "stat events on existing thread id"), OPT_BOOLEAN('a', "all-cpus", &target.system_wide, "system-wide collection from all CPUs"), OPT_BOOLEAN('g', "group", &group, "put the counters into a counter group"), OPT_BOOLEAN(0, "scale", &stat_config.scale, "Use --no-scale to disable counter scaling for multiplexing"), OPT_INCR('v', "verbose", &verbose, "be more verbose (show counter open errors, etc)"), OPT_INTEGER('r', "repeat", &stat_config.run_count, "repeat command and print average + stddev (max: 100, forever: 0)"), OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table, "display details about each run (only with -r option)"), OPT_BOOLEAN('n', "null", &stat_config.null_run, "null run - dont start any counters"), OPT_INCR('d', "detailed", &detailed_run, "detailed run - start a lot of events"), OPT_BOOLEAN('S', "sync", &sync_run, "call sync() before starting a run"), OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, "print large numbers with thousands\' separators", stat__set_big_num), OPT_STRING('C', "cpu", &target.cpu_list, "cpu", "list of cpus to monitor in system-wide"), OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode, "disable CPU count aggregation", AGGR_NONE), OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"), OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator", "print counts with custom separator"), OPT_CALLBACK('G', "cgroup", &evsel_list, "name", "monitor event in cgroup name only", parse_cgroups), OPT_STRING('o', "output", &output_name, "file", "output file name"), OPT_BOOLEAN(0, "append", &append_file, "append to the output file"), OPT_INTEGER(0, "log-fd", &output_fd, "log output to fd, instead of stderr"), OPT_STRING(0, "pre", &pre_cmd, "command", "command to run prior to the measured command"), OPT_STRING(0, "post", &post_cmd, "command", "command to run after to the measured command"), OPT_UINTEGER('I', "interval-print", &stat_config.interval, "print counts at regular interval in ms " "(overhead is possible for values <= 100ms)"), OPT_INTEGER(0, "interval-count", &stat_config.times, "print counts for fixed number of times"), OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear, "clear screen in between new interval"), OPT_UINTEGER(0, "timeout", &stat_config.timeout, "stop workload and print counts after a timeout period in ms (>= 10ms)"), OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode, "aggregate counts per processor socket", AGGR_SOCKET), OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode, "aggregate counts per processor die", AGGR_DIE), OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode, "aggregate counts per physical processor core", AGGR_CORE), OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode, "aggregate counts per thread", AGGR_THREAD), OPT_UINTEGER('D', "delay", &stat_config.initial_delay, "ms to wait before starting measurement after program start"), OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL, "Only print computed metrics. No raw values", enable_metric_only), OPT_BOOLEAN(0, "topdown", &topdown_run, "measure topdown level 1 statistics"), OPT_BOOLEAN(0, "smi-cost", &smi_cost, "measure SMI cost"), OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list", "monitor specified metrics or metric groups (separated by ,)", parse_metric_groups), OPT_END() }; static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused, struct perf_cpu_map *map, int cpu) { return cpu_map__get_socket(map, cpu, NULL); } static int perf_stat__get_die(struct perf_stat_config *config __maybe_unused, struct perf_cpu_map *map, int cpu) { return cpu_map__get_die(map, cpu, NULL); } static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused, struct perf_cpu_map *map, int cpu) { return cpu_map__get_core(map, cpu, NULL); } static int cpu_map__get_max(struct perf_cpu_map *map) { int i, max = -1; for (i = 0; i < map->nr; i++) { if (map->map[i] > max) max = map->map[i]; } return max; } static int perf_stat__get_aggr(struct perf_stat_config *config, aggr_get_id_t get_id, struct perf_cpu_map *map, int idx) { int cpu; if (idx >= map->nr) return -1; cpu = map->map[idx]; if (config->cpus_aggr_map->map[cpu] == -1) config->cpus_aggr_map->map[cpu] = get_id(config, map, idx); return config->cpus_aggr_map->map[cpu]; } static int perf_stat__get_socket_cached(struct perf_stat_config *config, struct perf_cpu_map *map, int idx) { return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx); } static int perf_stat__get_die_cached(struct perf_stat_config *config, struct perf_cpu_map *map, int idx) { return perf_stat__get_aggr(config, perf_stat__get_die, map, idx); } static int perf_stat__get_core_cached(struct perf_stat_config *config, struct perf_cpu_map *map, int idx) { return perf_stat__get_aggr(config, perf_stat__get_core, map, idx); } static bool term_percore_set(void) { struct evsel *counter; evlist__for_each_entry(evsel_list, counter) { if (counter->percore) return true; } return false; } static int perf_stat_init_aggr_mode(void) { int nr; switch (stat_config.aggr_mode) { case AGGR_SOCKET: if (cpu_map__build_socket_map(evsel_list->core.cpus, &stat_config.aggr_map)) { perror("cannot build socket map"); return -1; } stat_config.aggr_get_id = perf_stat__get_socket_cached; break; case AGGR_DIE: if (cpu_map__build_die_map(evsel_list->core.cpus, &stat_config.aggr_map)) { perror("cannot build die map"); return -1; } stat_config.aggr_get_id = perf_stat__get_die_cached; break; case AGGR_CORE: if (cpu_map__build_core_map(evsel_list->core.cpus, &stat_config.aggr_map)) { perror("cannot build core map"); return -1; } stat_config.aggr_get_id = perf_stat__get_core_cached; break; case AGGR_NONE: if (term_percore_set()) { if (cpu_map__build_core_map(evsel_list->core.cpus, &stat_config.aggr_map)) { perror("cannot build core map"); return -1; } stat_config.aggr_get_id = perf_stat__get_core_cached; } break; case AGGR_GLOBAL: case AGGR_THREAD: case AGGR_UNSET: default: break; } /* * The evsel_list->cpus is the base we operate on, * taking the highest cpu number to be the size of * the aggregation translate cpumap. */ nr = cpu_map__get_max(evsel_list->core.cpus); stat_config.cpus_aggr_map = perf_cpu_map__empty_new(nr + 1); return stat_config.cpus_aggr_map ? 0 : -ENOMEM; } static void perf_stat__exit_aggr_mode(void) { perf_cpu_map__put(stat_config.aggr_map); perf_cpu_map__put(stat_config.cpus_aggr_map); stat_config.aggr_map = NULL; stat_config.cpus_aggr_map = NULL; } static inline int perf_env__get_cpu(struct perf_env *env, struct perf_cpu_map *map, int idx) { int cpu; if (idx > map->nr) return -1; cpu = map->map[idx]; if (cpu >= env->nr_cpus_avail) return -1; return cpu; } static int perf_env__get_socket(struct perf_cpu_map *map, int idx, void *data) { struct perf_env *env = data; int cpu = perf_env__get_cpu(env, map, idx); return cpu == -1 ? -1 : env->cpu[cpu].socket_id; } static int perf_env__get_die(struct perf_cpu_map *map, int idx, void *data) { struct perf_env *env = data; int die_id = -1, cpu = perf_env__get_cpu(env, map, idx); if (cpu != -1) { /* * Encode socket in bit range 15:8 * die_id is relative to socket, * we need a global id. So we combine * socket + die id */ if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n")) return -1; if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n")) return -1; die_id = (env->cpu[cpu].socket_id << 8) | (env->cpu[cpu].die_id & 0xff); } return die_id; } static int perf_env__get_core(struct perf_cpu_map *map, int idx, void *data) { struct perf_env *env = data; int core = -1, cpu = perf_env__get_cpu(env, map, idx); if (cpu != -1) { /* * Encode socket in bit range 31:24 * encode die id in bit range 23:16 * core_id is relative to socket and die, * we need a global id. So we combine * socket + die id + core id */ if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n")) return -1; if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n")) return -1; if (WARN_ONCE(env->cpu[cpu].core_id >> 16, "The core id number is too big.\n")) return -1; core = (env->cpu[cpu].socket_id << 24) | (env->cpu[cpu].die_id << 16) | (env->cpu[cpu].core_id & 0xffff); } return core; } static int perf_env__build_socket_map(struct perf_env *env, struct perf_cpu_map *cpus, struct perf_cpu_map **sockp) { return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env); } static int perf_env__build_die_map(struct perf_env *env, struct perf_cpu_map *cpus, struct perf_cpu_map **diep) { return cpu_map__build_map(cpus, diep, perf_env__get_die, env); } static int perf_env__build_core_map(struct perf_env *env, struct perf_cpu_map *cpus, struct perf_cpu_map **corep) { return cpu_map__build_map(cpus, corep, perf_env__get_core, env); } static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused, struct perf_cpu_map *map, int idx) { return perf_env__get_socket(map, idx, &perf_stat.session->header.env); } static int perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused, struct perf_cpu_map *map, int idx) { return perf_env__get_die(map, idx, &perf_stat.session->header.env); } static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused, struct perf_cpu_map *map, int idx) { return perf_env__get_core(map, idx, &perf_stat.session->header.env); } static int perf_stat_init_aggr_mode_file(struct perf_stat *st) { struct perf_env *env = &st->session->header.env; switch (stat_config.aggr_mode) { case AGGR_SOCKET: if (perf_env__build_socket_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { perror("cannot build socket map"); return -1; } stat_config.aggr_get_id = perf_stat__get_socket_file; break; case AGGR_DIE: if (perf_env__build_die_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { perror("cannot build die map"); return -1; } stat_config.aggr_get_id = perf_stat__get_die_file; break; case AGGR_CORE: if (perf_env__build_core_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { perror("cannot build core map"); return -1; } stat_config.aggr_get_id = perf_stat__get_core_file; break; case AGGR_NONE: case AGGR_GLOBAL: case AGGR_THREAD: case AGGR_UNSET: default: break; } return 0; } static int topdown_filter_events(const char **attr, char **str, bool use_group) { int off = 0; int i; int len = 0; char *s; for (i = 0; attr[i]; i++) { if (pmu_have_event("cpu", attr[i])) { len += strlen(attr[i]) + 1; attr[i - off] = attr[i]; } else off++; } attr[i - off] = NULL; *str = malloc(len + 1 + 2); if (!*str) return -1; s = *str; if (i - off == 0) { *s = 0; return 0; } if (use_group) *s++ = '{'; for (i = 0; attr[i]; i++) { strcpy(s, attr[i]); s += strlen(s); *s++ = ','; } if (use_group) { s[-1] = '}'; *s = 0; } else s[-1] = 0; return 0; } __weak bool arch_topdown_check_group(bool *warn) { *warn = false; return false; } __weak void arch_topdown_group_warn(void) { } /* * Add default attributes, if there were no attributes specified or * if -d/--detailed, -d -d or -d -d -d is used: */ static int add_default_attributes(void) { int err; struct perf_event_attr default_attrs0[] = { { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, }; struct perf_event_attr frontend_attrs[] = { { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND }, }; struct perf_event_attr backend_attrs[] = { { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND }, }; struct perf_event_attr default_attrs1[] = { { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, }; /* * Detailed stats (-d), covering the L1 and last level data caches: */ struct perf_event_attr detailed_attrs[] = { { .type = PERF_TYPE_HW_CACHE, .config = PERF_COUNT_HW_CACHE_L1D << 0 | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, { .type = PERF_TYPE_HW_CACHE, .config = PERF_COUNT_HW_CACHE_L1D << 0 | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, { .type = PERF_TYPE_HW_CACHE, .config = PERF_COUNT_HW_CACHE_LL << 0 | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, { .type = PERF_TYPE_HW_CACHE, .config = PERF_COUNT_HW_CACHE_LL << 0 | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, }; /* * Very detailed stats (-d -d), covering the instruction cache and the TLB caches: */ struct perf_event_attr very_detailed_attrs[] = { { .type = PERF_TYPE_HW_CACHE, .config = PERF_COUNT_HW_CACHE_L1I << 0 | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, { .type = PERF_TYPE_HW_CACHE, .config = PERF_COUNT_HW_CACHE_L1I << 0 | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, { .type = PERF_TYPE_HW_CACHE, .config = PERF_COUNT_HW_CACHE_DTLB << 0 | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, { .type = PERF_TYPE_HW_CACHE, .config = PERF_COUNT_HW_CACHE_DTLB << 0 | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, { .type = PERF_TYPE_HW_CACHE, .config = PERF_COUNT_HW_CACHE_ITLB << 0 | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, { .type = PERF_TYPE_HW_CACHE, .config = PERF_COUNT_HW_CACHE_ITLB << 0 | (PERF_COUNT_HW_CACHE_OP_READ << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, }; /* * Very, very detailed stats (-d -d -d), adding prefetch events: */ struct perf_event_attr very_very_detailed_attrs[] = { { .type = PERF_TYPE_HW_CACHE, .config = PERF_COUNT_HW_CACHE_L1D << 0 | (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, { .type = PERF_TYPE_HW_CACHE, .config = PERF_COUNT_HW_CACHE_L1D << 0 | (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, }; struct parse_events_error errinfo; /* Set attrs if no event is selected and !null_run: */ if (stat_config.null_run) return 0; if (transaction_run) { /* Handle -T as -M transaction. Once platform specific metrics * support has been added to the json files, all archictures * will use this approach. To determine transaction support * on an architecture test for such a metric name. */ if (metricgroup__has_metric("transaction")) { struct option opt = { .value = &evsel_list }; return metricgroup__parse_groups(&opt, "transaction", &stat_config.metric_events); } if (pmu_have_event("cpu", "cycles-ct") && pmu_have_event("cpu", "el-start")) err = parse_events(evsel_list, transaction_attrs, &errinfo); else err = parse_events(evsel_list, transaction_limited_attrs, &errinfo); if (err) { fprintf(stderr, "Cannot set up transaction events\n"); parse_events_print_error(&errinfo, transaction_attrs); return -1; } return 0; } if (smi_cost) { int smi; if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) { fprintf(stderr, "freeze_on_smi is not supported.\n"); return -1; } if (!smi) { if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) { fprintf(stderr, "Failed to set freeze_on_smi.\n"); return -1; } smi_reset = true; } if (pmu_have_event("msr", "aperf") && pmu_have_event("msr", "smi")) { if (!force_metric_only) stat_config.metric_only = true; err = parse_events(evsel_list, smi_cost_attrs, &errinfo); } else { fprintf(stderr, "To measure SMI cost, it needs " "msr/aperf/, msr/smi/ and cpu/cycles/ support\n"); parse_events_print_error(&errinfo, smi_cost_attrs); return -1; } if (err) { fprintf(stderr, "Cannot set up SMI cost events\n"); return -1; } return 0; } if (topdown_run) { char *str = NULL; bool warn = false; if (stat_config.aggr_mode != AGGR_GLOBAL && stat_config.aggr_mode != AGGR_CORE) { pr_err("top down event configuration requires --per-core mode\n"); return -1; } stat_config.aggr_mode = AGGR_CORE; if (nr_cgroups || !target__has_cpu(&target)) { pr_err("top down event configuration requires system-wide mode (-a)\n"); return -1; } if (!force_metric_only) stat_config.metric_only = true; if (topdown_filter_events(topdown_attrs, &str, arch_topdown_check_group(&warn)) < 0) { pr_err("Out of memory\n"); return -1; } if (topdown_attrs[0] && str) { if (warn) arch_topdown_group_warn(); err = parse_events(evsel_list, str, &errinfo); if (err) { fprintf(stderr, "Cannot set up top down events %s: %d\n", str, err); parse_events_print_error(&errinfo, str); free(str); return -1; } } else { fprintf(stderr, "System does not support topdown\n"); return -1; } free(str); } if (!evsel_list->core.nr_entries) { if (target__has_cpu(&target)) default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK; if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0) return -1; if (pmu_have_event("cpu", "stalled-cycles-frontend")) { if (perf_evlist__add_default_attrs(evsel_list, frontend_attrs) < 0) return -1; } if (pmu_have_event("cpu", "stalled-cycles-backend")) { if (perf_evlist__add_default_attrs(evsel_list, backend_attrs) < 0) return -1; } if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0) return -1; } /* Detailed events get appended to the event list: */ if (detailed_run < 1) return 0; /* Append detailed run extra attributes: */ if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0) return -1; if (detailed_run < 2) return 0; /* Append very detailed run extra attributes: */ if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0) return -1; if (detailed_run < 3) return 0; /* Append very, very detailed run extra attributes: */ return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs); } static const char * const stat_record_usage[] = { "perf stat record []", NULL, }; static void init_features(struct perf_session *session) { int feat; for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) perf_header__set_feat(&session->header, feat); perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT); perf_header__clear_feat(&session->header, HEADER_BUILD_ID); perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); perf_header__clear_feat(&session->header, HEADER_AUXTRACE); } static int __cmd_record(int argc, const char **argv) { struct perf_session *session; struct perf_data *data = &perf_stat.data; argc = parse_options(argc, argv, stat_options, stat_record_usage, PARSE_OPT_STOP_AT_NON_OPTION); if (output_name) data->path = output_name; if (stat_config.run_count != 1 || forever) { pr_err("Cannot use -r option with perf stat record.\n"); return -1; } session = perf_session__new(data, false, NULL); if (session == NULL) { pr_err("Perf session creation failed.\n"); return -1; } init_features(session); session->evlist = evsel_list; perf_stat.session = session; perf_stat.record = true; return argc; } static int process_stat_round_event(struct perf_session *session, union perf_event *event) { struct perf_record_stat_round *stat_round = &event->stat_round; struct evsel *counter; struct timespec tsh, *ts = NULL; const char **argv = session->header.env.cmdline_argv; int argc = session->header.env.nr_cmdline; evlist__for_each_entry(evsel_list, counter) perf_stat_process_counter(&stat_config, counter); if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL) update_stats(&walltime_nsecs_stats, stat_round->time); if (stat_config.interval && stat_round->time) { tsh.tv_sec = stat_round->time / NSEC_PER_SEC; tsh.tv_nsec = stat_round->time % NSEC_PER_SEC; ts = &tsh; } print_counters(ts, argc, argv); return 0; } static int process_stat_config_event(struct perf_session *session, union perf_event *event) { struct perf_tool *tool = session->tool; struct perf_stat *st = container_of(tool, struct perf_stat, tool); perf_event__read_stat_config(&stat_config, &event->stat_config); if (perf_cpu_map__empty(st->cpus)) { if (st->aggr_mode != AGGR_UNSET) pr_warning("warning: processing task data, aggregation mode not set\n"); return 0; } if (st->aggr_mode != AGGR_UNSET) stat_config.aggr_mode = st->aggr_mode; if (perf_stat.data.is_pipe) perf_stat_init_aggr_mode(); else perf_stat_init_aggr_mode_file(st); return 0; } static int set_maps(struct perf_stat *st) { if (!st->cpus || !st->threads) return 0; if (WARN_ONCE(st->maps_allocated, "stats double allocation\n")) return -EINVAL; perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads); if (perf_evlist__alloc_stats(evsel_list, true)) return -ENOMEM; st->maps_allocated = true; return 0; } static int process_thread_map_event(struct perf_session *session, union perf_event *event) { struct perf_tool *tool = session->tool; struct perf_stat *st = container_of(tool, struct perf_stat, tool); if (st->threads) { pr_warning("Extra thread map event, ignoring.\n"); return 0; } st->threads = thread_map__new_event(&event->thread_map); if (!st->threads) return -ENOMEM; return set_maps(st); } static int process_cpu_map_event(struct perf_session *session, union perf_event *event) { struct perf_tool *tool = session->tool; struct perf_stat *st = container_of(tool, struct perf_stat, tool); struct perf_cpu_map *cpus; if (st->cpus) { pr_warning("Extra cpu map event, ignoring.\n"); return 0; } cpus = cpu_map__new_data(&event->cpu_map.data); if (!cpus) return -ENOMEM; st->cpus = cpus; return set_maps(st); } static int runtime_stat_new(struct perf_stat_config *config, int nthreads) { int i; config->stats = calloc(nthreads, sizeof(struct runtime_stat)); if (!config->stats) return -1; config->stats_num = nthreads; for (i = 0; i < nthreads; i++) runtime_stat__init(&config->stats[i]); return 0; } static void runtime_stat_delete(struct perf_stat_config *config) { int i; if (!config->stats) return; for (i = 0; i < config->stats_num; i++) runtime_stat__exit(&config->stats[i]); zfree(&config->stats); } static const char * const stat_report_usage[] = { "perf stat report []", NULL, }; static struct perf_stat perf_stat = { .tool = { .attr = perf_event__process_attr, .event_update = perf_event__process_event_update, .thread_map = process_thread_map_event, .cpu_map = process_cpu_map_event, .stat_config = process_stat_config_event, .stat = perf_event__process_stat_event, .stat_round = process_stat_round_event, }, .aggr_mode = AGGR_UNSET, }; static int __cmd_report(int argc, const char **argv) { struct perf_session *session; const struct option options[] = { OPT_STRING('i', "input", &input_name, "file", "input file name"), OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode, "aggregate counts per processor socket", AGGR_SOCKET), OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode, "aggregate counts per processor die", AGGR_DIE), OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode, "aggregate counts per physical processor core", AGGR_CORE), OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode, "disable CPU count aggregation", AGGR_NONE), OPT_END() }; struct stat st; int ret; argc = parse_options(argc, argv, options, stat_report_usage, 0); if (!input_name || !strlen(input_name)) { if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) input_name = "-"; else input_name = "perf.data"; } perf_stat.data.path = input_name; perf_stat.data.mode = PERF_DATA_MODE_READ; session = perf_session__new(&perf_stat.data, false, &perf_stat.tool); if (session == NULL) return -1; perf_stat.session = session; stat_config.output = stderr; evsel_list = session->evlist; ret = perf_session__process_events(session); if (ret) return ret; perf_session__delete(session); return 0; } static void setup_system_wide(int forks) { /* * Make system wide (-a) the default target if * no target was specified and one of following * conditions is met: * * - there's no workload specified * - there is workload specified but all requested * events are system wide events */ if (!target__none(&target)) return; if (!forks) target.system_wide = true; else { struct evsel *counter; evlist__for_each_entry(evsel_list, counter) { if (!counter->system_wide) return; } if (evsel_list->core.nr_entries) target.system_wide = true; } } int cmd_stat(int argc, const char **argv) { const char * const stat_usage[] = { "perf stat [] []", NULL }; int status = -EINVAL, run_idx; const char *mode; FILE *output = stderr; unsigned int interval, timeout; const char * const stat_subcommands[] = { "record", "report" }; setlocale(LC_ALL, ""); evsel_list = evlist__new(); if (evsel_list == NULL) return -ENOMEM; parse_events__shrink_config_terms(); /* String-parsing callback-based options would segfault when negated */ set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG); set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG); set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG); argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands, (const char **) stat_usage, PARSE_OPT_STOP_AT_NON_OPTION); perf_stat__collect_metric_expr(evsel_list); perf_stat__init_shadow_stats(); if (stat_config.csv_sep) { stat_config.csv_output = true; if (!strcmp(stat_config.csv_sep, "\\t")) stat_config.csv_sep = "\t"; } else stat_config.csv_sep = DEFAULT_SEPARATOR; if (argc && !strncmp(argv[0], "rec", 3)) { argc = __cmd_record(argc, argv); if (argc < 0) return -1; } else if (argc && !strncmp(argv[0], "rep", 3)) return __cmd_report(argc, argv); interval = stat_config.interval; timeout = stat_config.timeout; /* * For record command the -o is already taken care of. */ if (!STAT_RECORD && output_name && strcmp(output_name, "-")) output = NULL; if (output_name && output_fd) { fprintf(stderr, "cannot use both --output and --log-fd\n"); parse_options_usage(stat_usage, stat_options, "o", 1); parse_options_usage(NULL, stat_options, "log-fd", 0); goto out; } if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) { fprintf(stderr, "--metric-only is not supported with --per-thread\n"); goto out; } if (stat_config.metric_only && stat_config.run_count > 1) { fprintf(stderr, "--metric-only is not supported with -r\n"); goto out; } if (stat_config.walltime_run_table && stat_config.run_count <= 1) { fprintf(stderr, "--table is only supported with -r\n"); parse_options_usage(stat_usage, stat_options, "r", 1); parse_options_usage(NULL, stat_options, "table", 0); goto out; } if (output_fd < 0) { fprintf(stderr, "argument to --log-fd must be a > 0\n"); parse_options_usage(stat_usage, stat_options, "log-fd", 0); goto out; } if (!output) { struct timespec tm; mode = append_file ? "a" : "w"; output = fopen(output_name, mode); if (!output) { perror("failed to create output file"); return -1; } clock_gettime(CLOCK_REALTIME, &tm); fprintf(output, "# started on %s\n", ctime(&tm.tv_sec)); } else if (output_fd > 0) { mode = append_file ? "a" : "w"; output = fdopen(output_fd, mode); if (!output) { perror("Failed opening logfd"); return -errno; } } stat_config.output = output; /* * let the spreadsheet do the pretty-printing */ if (stat_config.csv_output) { /* User explicitly passed -B? */ if (big_num_opt == 1) { fprintf(stderr, "-B option not supported with -x\n"); parse_options_usage(stat_usage, stat_options, "B", 1); parse_options_usage(NULL, stat_options, "x", 1); goto out; } else /* Nope, so disable big number formatting */ stat_config.big_num = false; } else if (big_num_opt == 0) /* User passed --no-big-num */ stat_config.big_num = false; setup_system_wide(argc); /* * Display user/system times only for single * run and when there's specified tracee. */ if ((stat_config.run_count == 1) && target__none(&target)) stat_config.ru_display = true; if (stat_config.run_count < 0) { pr_err("Run count must be a positive number\n"); parse_options_usage(stat_usage, stat_options, "r", 1); goto out; } else if (stat_config.run_count == 0) { forever = true; stat_config.run_count = 1; } if (stat_config.walltime_run_table) { stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0])); if (!stat_config.walltime_run) { pr_err("failed to setup -r option"); goto out; } } if ((stat_config.aggr_mode == AGGR_THREAD) && !target__has_task(&target)) { if (!target.system_wide || target.cpu_list) { fprintf(stderr, "The --per-thread option is only " "available when monitoring via -p -t -a " "options or only --per-thread.\n"); parse_options_usage(NULL, stat_options, "p", 1); parse_options_usage(NULL, stat_options, "t", 1); goto out; } } /* * no_aggr, cgroup are for system-wide only * --per-thread is aggregated per thread, we dont mix it with cpu mode */ if (((stat_config.aggr_mode != AGGR_GLOBAL && stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) && !target__has_cpu(&target)) { fprintf(stderr, "both cgroup and no-aggregation " "modes only available in system-wide mode\n"); parse_options_usage(stat_usage, stat_options, "G", 1); parse_options_usage(NULL, stat_options, "A", 1); parse_options_usage(NULL, stat_options, "a", 1); goto out; } if (add_default_attributes()) goto out; target__validate(&target); if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide)) target.per_thread = true; if (perf_evlist__create_maps(evsel_list, &target) < 0) { if (target__has_task(&target)) { pr_err("Problems finding threads of monitor\n"); parse_options_usage(stat_usage, stat_options, "p", 1); parse_options_usage(NULL, stat_options, "t", 1); } else if (target__has_cpu(&target)) { perror("failed to parse CPUs map"); parse_options_usage(stat_usage, stat_options, "C", 1); parse_options_usage(NULL, stat_options, "a", 1); } goto out; } /* * Initialize thread_map with comm names, * so we could print it out on output. */ if (stat_config.aggr_mode == AGGR_THREAD) { thread_map__read_comms(evsel_list->core.threads); if (target.system_wide) { if (runtime_stat_new(&stat_config, perf_thread_map__nr(evsel_list->core.threads))) { goto out; } } } if (stat_config.times && interval) interval_count = true; else if (stat_config.times && !interval) { pr_err("interval-count option should be used together with " "interval-print.\n"); parse_options_usage(stat_usage, stat_options, "interval-count", 0); parse_options_usage(stat_usage, stat_options, "I", 1); goto out; } if (timeout && timeout < 100) { if (timeout < 10) { pr_err("timeout must be >= 10ms.\n"); parse_options_usage(stat_usage, stat_options, "timeout", 0); goto out; } else pr_warning("timeout < 100ms. " "The overhead percentage could be high in some cases. " "Please proceed with caution.\n"); } if (timeout && interval) { pr_err("timeout option is not supported with interval-print.\n"); parse_options_usage(stat_usage, stat_options, "timeout", 0); parse_options_usage(stat_usage, stat_options, "I", 1); goto out; } if (perf_evlist__alloc_stats(evsel_list, interval)) goto out; if (perf_stat_init_aggr_mode()) goto out; /* * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless * while avoiding that older tools show confusing messages. * * However for pipe sessions we need to keep it zero, * because script's perf_evsel__check_attr is triggered * by attr->sample_type != 0, and we can't run it on * stat sessions. */ stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe); /* * We dont want to block the signals - that would cause * child tasks to inherit that and Ctrl-C would not work. * What we want is for Ctrl-C to work in the exec()-ed * task, but being ignored by perf stat itself: */ atexit(sig_atexit); if (!forever) signal(SIGINT, skip_signal); signal(SIGCHLD, skip_signal); signal(SIGALRM, skip_signal); signal(SIGABRT, skip_signal); status = 0; for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) { if (stat_config.run_count != 1 && verbose > 0) fprintf(output, "[ perf stat: executing run #%d ... ]\n", run_idx + 1); status = run_perf_stat(argc, argv, run_idx); if (forever && status != -1) { print_counters(NULL, argc, argv); perf_stat__reset_stats(); } } if (!forever && status != -1 && !interval) print_counters(NULL, argc, argv); if (STAT_RECORD) { /* * We synthesize the kernel mmap record just so that older tools * don't emit warnings about not being able to resolve symbols * due to /proc/sys/kernel/kptr_restrict settings and instear provide * a saner message about no samples being in the perf.data file. * * This also serves to suppress a warning about f_header.data.size == 0 * in header.c at the moment 'perf stat record' gets introduced, which * is not really needed once we start adding the stat specific PERF_RECORD_ * records, but the need to suppress the kptr_restrict messages in older * tools remain -acme */ int fd = perf_data__fd(&perf_stat.data); int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat, process_synthesized_event, &perf_stat.session->machines.host); if (err) { pr_warning("Couldn't synthesize the kernel mmap record, harmless, " "older tools may produce warnings about this file\n."); } if (!interval) { if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL)) pr_err("failed to write stat round event\n"); } if (!perf_stat.data.is_pipe) { perf_stat.session->header.data_size += perf_stat.bytes_written; perf_session__write_header(perf_stat.session, evsel_list, fd, true); } evlist__close(evsel_list); perf_session__delete(perf_stat.session); } perf_stat__exit_aggr_mode(); perf_evlist__free_stats(evsel_list); out: zfree(&stat_config.walltime_run); if (smi_cost && smi_reset) sysfs__write_int(FREEZE_ON_SMI_PATH, 0); evlist__delete(evsel_list); runtime_stat_delete(&stat_config); return status; }