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Diffstat (limited to '')
| -rw-r--r-- | tools/perf/builtin-stat.c | 2605 |
1 files changed, 2605 insertions, 0 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c new file mode 100644 index 000000000..bdd8dd54f --- /dev/null +++ b/tools/perf/builtin-stat.c @@ -0,0 +1,2605 @@ +// 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 <mingo@redhat.com> + * + * Improvements and fixes by: + * + * Arjan van de Ven <arjan@linux.intel.com> + * Yanmin Zhang <yanmin.zhang@intel.com> + * Wu Fengguang <fengguang.wu@intel.com> + * Mike Galbraith <efault@gmx.de> + * Paul Mackerras <paulus@samba.org> + * Jaswinder Singh Rajput <jaswinder@kernel.org> + */ + +#include "builtin.h" +#include "perf.h" +#include "util/cgroup.h" +#include <subcmd/parse-options.h> +#include "util/parse-events.h" +#include "util/pmu.h" +#include "util/event.h" +#include "util/evlist.h" +#include "util/evlist-hybrid.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_map.h" +#include "util/counts.h" +#include "util/topdown.h" +#include "util/session.h" +#include "util/tool.h" +#include "util/string2.h" +#include "util/metricgroup.h" +#include "util/synthetic-events.h" +#include "util/target.h" +#include "util/time-utils.h" +#include "util/top.h" +#include "util/affinity.h" +#include "util/pfm.h" +#include "util/bpf_counter.h" +#include "util/iostat.h" +#include "util/pmu-hybrid.h" +#include "asm/bug.h" + +#include <linux/time64.h> +#include <linux/zalloc.h> +#include <api/fs/fs.h> +#include <errno.h> +#include <signal.h> +#include <stdlib.h> +#include <sys/prctl.h> +#include <inttypes.h> +#include <locale.h> +#include <math.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/wait.h> +#include <unistd.h> +#include <sys/time.h> +#include <sys/resource.h> +#include <linux/err.h> + +#include <linux/ctype.h> +#include <perf/evlist.h> + +#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 *topdown_metric_attrs[] = { + "slots", + "topdown-retiring", + "topdown-bad-spec", + "topdown-fe-bound", + "topdown-be-bound", + NULL, +}; + +static const char *topdown_metric_L2_attrs[] = { + "slots", + "topdown-retiring", + "topdown-bad-spec", + "topdown-fe-bound", + "topdown-be-bound", + "topdown-heavy-ops", + "topdown-br-mispredict", + "topdown-fetch-lat", + "topdown-mem-bound", + NULL, +}; + +#define TOPDOWN_MAX_LEVEL 2 + +static const char *smi_cost_attrs = { + "{" + "msr/aperf/," + "msr/smi/," + "cycles" + "}" +}; + +static struct evlist *evsel_list; +static bool all_counters_use_bpf = true; + +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; +static char *metrics; + +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, + .ru_stats = &ru_stats, + .big_num = true, + .ctl_fd = -1, + .ctl_fd_ack = -1, + .iostat_run = false, +}; + +static bool cpus_map_matched(struct evsel *a, struct evsel *b) +{ + if (!a->core.cpus && !b->core.cpus) + return true; + + if (!a->core.cpus || !b->core.cpus) + return false; + + if (perf_cpu_map__nr(a->core.cpus) != perf_cpu_map__nr(b->core.cpus)) + return false; + + for (int i = 0; i < perf_cpu_map__nr(a->core.cpus); i++) { + if (perf_cpu_map__cpu(a->core.cpus, i).cpu != + perf_cpu_map__cpu(b->core.cpus, i).cpu) + return false; + } + + return true; +} + +static void evlist__check_cpu_maps(struct evlist *evlist) +{ + struct evsel *evsel, *pos, *leader; + char buf[1024]; + + if (evlist__has_hybrid(evlist)) + evlist__warn_hybrid_group(evlist); + + evlist__for_each_entry(evlist, evsel) { + leader = evsel__leader(evsel); + + /* Check that leader matches cpus with each member. */ + if (leader == evsel) + continue; + if (cpus_map_matched(leader, evsel)) + continue; + + /* If there's mismatch disable the group and warn user. */ + WARN_ONCE(1, "WARNING: grouped events cpus do not match, disabling group:\n"); + evsel__group_desc(leader, buf, sizeof(buf)); + pr_warning(" %s\n", buf); + + if (verbose) { + cpu_map__snprint(leader->core.cpus, buf, sizeof(buf)); + pr_warning(" %s: %s\n", leader->name, buf); + cpu_map__snprint(evsel->core.cpus, buf, sizeof(buf)); + pr_warning(" %s: %s\n", evsel->name, buf); + } + + for_each_group_evsel(pos, leader) + evsel__remove_from_group(pos, leader); + } +} + +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) +{ + evlist__reset_stats(evsel_list); + perf_stat__reset_shadow_stats(); +} + +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->core.sample_id, x, y) + +static int evsel__write_stat_event(struct evsel *counter, int cpu_map_idx, u32 thread, + struct perf_counts_values *count) +{ + struct perf_sample_id *sid = SID(counter, cpu_map_idx, thread); + struct perf_cpu cpu = perf_cpu_map__cpu(evsel__cpus(counter), cpu_map_idx); + + 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_map_idx, + int thread, struct timespec *rs) +{ + switch(counter->tool_event) { + case PERF_TOOL_DURATION_TIME: { + u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL; + struct perf_counts_values *count = + perf_counts(counter->counts, cpu_map_idx, thread); + count->ena = count->run = val; + count->val = val; + return 0; + } + case PERF_TOOL_USER_TIME: + case PERF_TOOL_SYSTEM_TIME: { + u64 val; + struct perf_counts_values *count = + perf_counts(counter->counts, cpu_map_idx, thread); + if (counter->tool_event == PERF_TOOL_USER_TIME) + val = ru_stats.ru_utime_usec_stat.mean; + else + val = ru_stats.ru_stime_usec_stat.mean; + count->ena = count->run = val; + count->val = val; + return 0; + } + default: + case PERF_TOOL_NONE: + return evsel__read_counter(counter, cpu_map_idx, thread); + case PERF_TOOL_MAX: + /* This should never be reached */ + return 0; + } +} + +/* + * Read out the results of a single counter: + * do not aggregate counts across CPUs in system-wide mode + */ +static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu_map_idx) +{ + int nthreads = perf_thread_map__nr(evsel_list->core.threads); + int thread; + + if (!counter->supported) + return -ENOENT; + + for (thread = 0; thread < nthreads; thread++) { + struct perf_counts_values *count; + + count = perf_counts(counter->counts, cpu_map_idx, thread); + + /* + * The leader's group read loads data into its group members + * (via evsel__read_counter()) and sets their count->loaded. + */ + if (!perf_counts__is_loaded(counter->counts, cpu_map_idx, thread) && + read_single_counter(counter, cpu_map_idx, thread, rs)) { + counter->counts->scaled = -1; + perf_counts(counter->counts, cpu_map_idx, thread)->ena = 0; + perf_counts(counter->counts, cpu_map_idx, thread)->run = 0; + return -1; + } + + perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, false); + + if (STAT_RECORD) { + if (evsel__write_stat_event(counter, cpu_map_idx, 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", + evsel__name(counter), + perf_cpu_map__cpu(evsel__cpus(counter), + cpu_map_idx).cpu, + count->val, count->ena, count->run); + } + } + + return 0; +} + +static int read_affinity_counters(struct timespec *rs) +{ + struct evlist_cpu_iterator evlist_cpu_itr; + struct affinity saved_affinity, *affinity; + + if (all_counters_use_bpf) + return 0; + + if (!target__has_cpu(&target) || target__has_per_thread(&target)) + affinity = NULL; + else if (affinity__setup(&saved_affinity) < 0) + return -1; + else + affinity = &saved_affinity; + + evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) { + struct evsel *counter = evlist_cpu_itr.evsel; + + if (evsel__is_bpf(counter)) + continue; + + if (!counter->err) { + counter->err = read_counter_cpu(counter, rs, + evlist_cpu_itr.cpu_map_idx); + } + } + if (affinity) + affinity__cleanup(&saved_affinity); + + return 0; +} + +static int read_bpf_map_counters(void) +{ + struct evsel *counter; + int err; + + evlist__for_each_entry(evsel_list, counter) { + if (!evsel__is_bpf(counter)) + continue; + + err = bpf_counter__read(counter); + if (err) + return err; + } + return 0; +} + +static void read_counters(struct timespec *rs) +{ + struct evsel *counter; + + if (!stat_config.stop_read_counter) { + if (read_bpf_map_counters() || + read_affinity_counters(rs)) + return; + } + + evlist__for_each_entry(evsel_list, counter) { + if (counter->err) + pr_debug("failed to read counter %s\n", counter->name); + if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter)) + pr_warning("failed to process counter %s\n", counter->name); + counter->err = 0; + } +} + +static void process_interval(void) +{ + struct timespec ts, rs; + + clock_gettime(CLOCK_MONOTONIC, &ts); + diff_timespec(&rs, &ts, &ref_time); + + perf_stat__reset_shadow_per_stat(&rt_stat); + 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 * 1000000ULL); + print_counters(&rs, 0, NULL); +} + +static bool handle_interval(unsigned int interval, int *times) +{ + if (interval) { + process_interval(); + if (interval_count && !(--(*times))) + return true; + } + return false; +} + +static int enable_counters(void) +{ + struct evsel *evsel; + int err; + + evlist__for_each_entry(evsel_list, evsel) { + if (!evsel__is_bpf(evsel)) + continue; + + err = bpf_counter__enable(evsel); + if (err) + return err; + } + + if (!target__enable_on_exec(&target)) { + if (!all_counters_use_bpf) + evlist__enable(evsel_list); + } + return 0; +} + +static void disable_counters(void) +{ + struct evsel *counter; + + /* + * 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__for_each_entry(evsel_list, counter) + bpf_counter__disable(counter); + if (!all_counters_use_bpf) + evlist__disable(evsel_list); + } +} + +static volatile int workload_exec_errno; + +/* + * 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 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 void process_evlist(struct evlist *evlist, unsigned int interval) +{ + enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED; + + if (evlist__ctlfd_process(evlist, &cmd) > 0) { + switch (cmd) { + case EVLIST_CTL_CMD_ENABLE: + __fallthrough; + case EVLIST_CTL_CMD_DISABLE: + if (interval) + process_interval(); + break; + case EVLIST_CTL_CMD_SNAPSHOT: + case EVLIST_CTL_CMD_ACK: + case EVLIST_CTL_CMD_UNSUPPORTED: + case EVLIST_CTL_CMD_EVLIST: + case EVLIST_CTL_CMD_STOP: + case EVLIST_CTL_CMD_PING: + default: + break; + } + } +} + +static void compute_tts(struct timespec *time_start, struct timespec *time_stop, + int *time_to_sleep) +{ + int tts = *time_to_sleep; + struct timespec time_diff; + + diff_timespec(&time_diff, time_stop, time_start); + + tts -= time_diff.tv_sec * MSEC_PER_SEC + + time_diff.tv_nsec / NSEC_PER_MSEC; + + if (tts < 0) + tts = 0; + + *time_to_sleep = tts; +} + +static int dispatch_events(bool forks, int timeout, int interval, int *times) +{ + int child_exited = 0, status = 0; + int time_to_sleep, sleep_time; + struct timespec time_start, time_stop; + + if (interval) + sleep_time = interval; + else if (timeout) + sleep_time = timeout; + else + sleep_time = 1000; + + time_to_sleep = sleep_time; + + while (!done) { + if (forks) + child_exited = waitpid(child_pid, &status, WNOHANG); + else + child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0; + + if (child_exited) + break; + + clock_gettime(CLOCK_MONOTONIC, &time_start); + if (!(evlist__poll(evsel_list, time_to_sleep) > 0)) { /* poll timeout or EINTR */ + if (timeout || handle_interval(interval, times)) + break; + time_to_sleep = sleep_time; + } else { /* fd revent */ + process_evlist(evsel_list, interval); + clock_gettime(CLOCK_MONOTONIC, &time_stop); + compute_tts(&time_start, &time_stop, &time_to_sleep); + } + } + + return status; +} + +enum counter_recovery { + COUNTER_SKIP, + COUNTER_RETRY, + COUNTER_FATAL, +}; + +static enum counter_recovery stat_handle_error(struct evsel *counter) +{ + char msg[BUFSIZ]; + /* + * 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", + evsel__name(counter)); + counter->supported = false; + /* + * errored is a sticky flag that means one of the counter's + * cpu event had a problem and needs to be reexamined. + */ + counter->errored = true; + + if ((evsel__leader(counter) != counter) || + !(counter->core.leader->nr_members > 1)) + return COUNTER_SKIP; + } else if (evsel__fallback(counter, errno, msg, sizeof(msg))) { + if (verbose > 0) + ui__warning("%s\n", msg); + return COUNTER_RETRY; + } 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; + return COUNTER_RETRY; + } + } + + evsel__open_strerror(counter, &target, errno, msg, sizeof(msg)); + ui__error("%s\n", msg); + + if (child_pid != -1) + kill(child_pid, SIGTERM); + return COUNTER_FATAL; +} + +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; + size_t l; + int status = 0; + const bool forks = (argc > 0); + bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false; + struct evlist_cpu_iterator evlist_cpu_itr; + struct affinity saved_affinity, *affinity = NULL; + int err; + bool second_pass = false; + + if (forks) { + if (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) + evlist__set_leader(evsel_list); + + if (!cpu_map__is_dummy(evsel_list->core.user_requested_cpus)) { + if (affinity__setup(&saved_affinity) < 0) + return -1; + affinity = &saved_affinity; + } + + evlist__for_each_entry(evsel_list, counter) { + counter->reset_group = false; + if (bpf_counter__load(counter, &target)) + return -1; + if (!(evsel__is_bperf(counter))) + all_counters_use_bpf = false; + } + + evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) { + counter = evlist_cpu_itr.evsel; + + /* + * bperf calls evsel__open_per_cpu() in bperf__load(), so + * no need to call it again here. + */ + if (target.use_bpf) + break; + + if (counter->reset_group || counter->errored) + continue; + if (evsel__is_bperf(counter)) + continue; +try_again: + if (create_perf_stat_counter(counter, &stat_config, &target, + evlist_cpu_itr.cpu_map_idx) < 0) { + + /* + * Weak group failed. We cannot just undo this here + * because earlier CPUs might be in group mode, and the kernel + * doesn't support mixing group and non group reads. Defer + * it to later. + * Don't close here because we're in the wrong affinity. + */ + if ((errno == EINVAL || errno == EBADF) && + evsel__leader(counter) != counter && + counter->weak_group) { + evlist__reset_weak_group(evsel_list, counter, false); + assert(counter->reset_group); + second_pass = true; + continue; + } + + switch (stat_handle_error(counter)) { + case COUNTER_FATAL: + return -1; + case COUNTER_RETRY: + goto try_again; + case COUNTER_SKIP: + continue; + default: + break; + } + + } + counter->supported = true; + } + + if (second_pass) { + /* + * Now redo all the weak group after closing them, + * and also close errored counters. + */ + + /* First close errored or weak retry */ + evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) { + counter = evlist_cpu_itr.evsel; + + if (!counter->reset_group && !counter->errored) + continue; + + perf_evsel__close_cpu(&counter->core, evlist_cpu_itr.cpu_map_idx); + } + /* Now reopen weak */ + evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) { + counter = evlist_cpu_itr.evsel; + + if (!counter->reset_group) + continue; +try_again_reset: + pr_debug2("reopening weak %s\n", evsel__name(counter)); + if (create_perf_stat_counter(counter, &stat_config, &target, + evlist_cpu_itr.cpu_map_idx) < 0) { + + switch (stat_handle_error(counter)) { + case COUNTER_FATAL: + return -1; + case COUNTER_RETRY: + goto try_again_reset; + case COUNTER_SKIP: + continue; + default: + break; + } + } + counter->supported = true; + } + } + affinity__cleanup(affinity); + + evlist__for_each_entry(evsel_list, counter) { + if (!counter->supported) { + perf_evsel__free_fd(&counter->core); + continue; + } + + l = strlen(counter->unit); + if (l > stat_config.unit_width) + stat_config.unit_width = l; + + if (evsel__should_store_id(counter) && + evsel__store_ids(counter, evsel_list)) + return -1; + } + + if (evlist__apply_filters(evsel_list, &counter)) { + pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", + counter->filter, evsel__name(counter), errno, + str_error_r(errno, msg, sizeof(msg))); + return -1; + } + + if (STAT_RECORD) { + int 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_event__synthesize_stat_events(&stat_config, NULL, evsel_list, + process_synthesized_event, is_pipe); + if (err < 0) + return err; + } + + if (target.initial_delay) { + pr_info(EVLIST_DISABLED_MSG); + } else { + err = enable_counters(); + if (err) + return -1; + } + + /* Exec the command, if any */ + if (forks) + evlist__start_workload(evsel_list); + + if (target.initial_delay > 0) { + usleep(target.initial_delay * USEC_PER_MSEC); + err = enable_counters(); + if (err) + return -1; + + pr_info(EVLIST_ENABLED_MSG); + } + + t0 = rdclock(); + clock_gettime(CLOCK_MONOTONIC, &ref_time); + + if (forks) { + if (interval || timeout || evlist__ctlfd_initialized(evsel_list)) + status = dispatch_events(forks, timeout, interval, ×); + if (child_pid != -1) { + if (timeout) + kill(child_pid, SIGTERM); + 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 { + status = dispatch_events(forks, timeout, interval, ×); + } + + disable_counters(); + + t1 = rdclock(); + + if (stat_config.walltime_run_table) + stat_config.walltime_run[run_idx] = t1 - t0; + + if (interval && stat_config.summary) { + stat_config.interval = 0; + stat_config.stop_read_counter = true; + init_stats(&walltime_nsecs_stats); + update_stats(&walltime_nsecs_stats, t1 - t0); + + if (stat_config.aggr_mode == AGGR_GLOBAL) + evlist__save_aggr_prev_raw_counts(evsel_list); + + evlist__copy_prev_raw_counts(evsel_list); + evlist__reset_prev_raw_counts(evsel_list); + perf_stat__reset_shadow_per_stat(&rt_stat); + } else { + update_stats(&walltime_nsecs_stats, t1 - t0); + update_rusage_stats(&ru_stats, &stat_config.ru_data); + } + + /* + * 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; + if (quiet) + return; + + 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); +} + +void perf_stat__set_big_num(int set) +{ + stat_config.big_num = (set != 0); +} + +void perf_stat__set_no_csv_summary(int set) +{ + stat_config.no_csv_summary = (set != 0); +} + +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; + perf_stat__set_big_num(!unset); + 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 append_metric_groups(const struct option *opt __maybe_unused, + const char *str, + int unset __maybe_unused) +{ + if (metrics) { + char *tmp; + + if (asprintf(&tmp, "%s,%s", metrics, str) < 0) + return -ENOMEM; + free(metrics); + metrics = tmp; + } else { + metrics = strdup(str); + if (!metrics) + return -ENOMEM; + } + return 0; +} + +static int parse_control_option(const struct option *opt, + const char *str, + int unset __maybe_unused) +{ + struct perf_stat_config *config = opt->value; + + return evlist__parse_control(str, &config->ctl_fd, &config->ctl_fd_ack, &config->ctl_fd_close); +} + +static int parse_stat_cgroups(const struct option *opt, + const char *str, int unset) +{ + if (stat_config.cgroup_list) { + pr_err("--cgroup and --for-each-cgroup cannot be used together\n"); + return -1; + } + + return parse_cgroups(opt, str, unset); +} + +static int parse_hybrid_type(const struct option *opt, + const char *str, + int unset __maybe_unused) +{ + struct evlist *evlist = *(struct evlist **)opt->value; + + if (!list_empty(&evlist->core.entries)) { + fprintf(stderr, "Must define cputype before events/metrics\n"); + return -1; + } + + evlist->hybrid_pmu_name = perf_pmu__hybrid_type_to_pmu(str); + if (!evlist->hybrid_pmu_name) { + fprintf(stderr, "--cputype %s is not supported!\n", str); + return -1; + } + + return 0; +} + +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"), +#ifdef HAVE_BPF_SKEL + OPT_STRING('b', "bpf-prog", &target.bpf_str, "bpf-prog-id", + "stat events on existing bpf program id"), + OPT_BOOLEAN(0, "bpf-counters", &target.use_bpf, + "use bpf program to count events"), + OPT_STRING(0, "bpf-attr-map", &target.attr_map, "attr-map-path", + "path to perf_event_attr map"), +#endif + 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_BOOLEAN(0, "hybrid-merge", &stat_config.hybrid_merge, + "Merge identical named hybrid events"), + OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator", + "print counts with custom separator"), + OPT_BOOLEAN('j', "json-output", &stat_config.json_output, + "print counts in JSON format"), + OPT_CALLBACK('G', "cgroup", &evsel_list, "name", + "monitor event in cgroup name only", parse_stat_cgroups), + OPT_STRING(0, "for-each-cgroup", &stat_config.cgroup_list, "name", + "expand events for each cgroup"), + 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_SET_UINT(0, "per-node", &stat_config.aggr_mode, + "aggregate counts per numa node", AGGR_NODE), + OPT_INTEGER('D', "delay", &target.initial_delay, + "ms to wait before starting measurement after program start (-1: start with events disabled)"), + OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL, + "Only print computed metrics. No raw values", enable_metric_only), + OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group, + "don't group metric events, impacts multiplexing"), + OPT_BOOLEAN(0, "metric-no-merge", &stat_config.metric_no_merge, + "don't try to share events between metrics in a group"), + OPT_BOOLEAN(0, "topdown", &topdown_run, + "measure top-down statistics"), + OPT_UINTEGER(0, "td-level", &stat_config.topdown_level, + "Set the metrics level for the top-down statistics (0: max level)"), + 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 ,)", + append_metric_groups), + OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel, + "Configure all used events to run in kernel space.", + PARSE_OPT_EXCLUSIVE), + OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user, + "Configure all used events to run in user space.", + PARSE_OPT_EXCLUSIVE), + OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread, + "Use with 'percore' event qualifier to show the event " + "counts of one hardware thread by sum up total hardware " + "threads of same physical core"), + OPT_BOOLEAN(0, "summary", &stat_config.summary, + "print summary for interval mode"), + OPT_BOOLEAN(0, "no-csv-summary", &stat_config.no_csv_summary, + "don't print 'summary' for CSV summary output"), + OPT_BOOLEAN(0, "quiet", &quiet, + "don't print any output, messages or warnings (useful with record)"), + OPT_CALLBACK(0, "cputype", &evsel_list, "hybrid cpu type", + "Only enable events on applying cpu with this type " + "for hybrid platform (e.g. core or atom)", + parse_hybrid_type), +#ifdef HAVE_LIBPFM + OPT_CALLBACK(0, "pfm-events", &evsel_list, "event", + "libpfm4 event selector. use 'perf list' to list available events", + parse_libpfm_events_option), +#endif + OPT_CALLBACK(0, "control", &stat_config, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]", + "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n" + "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n" + "\t\t\t Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.", + parse_control_option), + OPT_CALLBACK_OPTARG(0, "iostat", &evsel_list, &stat_config, "default", + "measure I/O performance metrics provided by arch/platform", + iostat_parse), + OPT_END() +}; + +static const char *const aggr_mode__string[] = { + [AGGR_CORE] = "core", + [AGGR_DIE] = "die", + [AGGR_GLOBAL] = "global", + [AGGR_NODE] = "node", + [AGGR_NONE] = "none", + [AGGR_SOCKET] = "socket", + [AGGR_THREAD] = "thread", + [AGGR_UNSET] = "unset", +}; + +static struct aggr_cpu_id perf_stat__get_socket(struct perf_stat_config *config __maybe_unused, + struct perf_cpu cpu) +{ + return aggr_cpu_id__socket(cpu, /*data=*/NULL); +} + +static struct aggr_cpu_id perf_stat__get_die(struct perf_stat_config *config __maybe_unused, + struct perf_cpu cpu) +{ + return aggr_cpu_id__die(cpu, /*data=*/NULL); +} + +static struct aggr_cpu_id perf_stat__get_core(struct perf_stat_config *config __maybe_unused, + struct perf_cpu cpu) +{ + return aggr_cpu_id__core(cpu, /*data=*/NULL); +} + +static struct aggr_cpu_id perf_stat__get_node(struct perf_stat_config *config __maybe_unused, + struct perf_cpu cpu) +{ + return aggr_cpu_id__node(cpu, /*data=*/NULL); +} + +static struct aggr_cpu_id perf_stat__get_aggr(struct perf_stat_config *config, + aggr_get_id_t get_id, struct perf_cpu cpu) +{ + struct aggr_cpu_id id = aggr_cpu_id__empty(); + + if (aggr_cpu_id__is_empty(&config->cpus_aggr_map->map[cpu.cpu])) + config->cpus_aggr_map->map[cpu.cpu] = get_id(config, cpu); + + id = config->cpus_aggr_map->map[cpu.cpu]; + return id; +} + +static struct aggr_cpu_id perf_stat__get_socket_cached(struct perf_stat_config *config, + struct perf_cpu cpu) +{ + return perf_stat__get_aggr(config, perf_stat__get_socket, cpu); +} + +static struct aggr_cpu_id perf_stat__get_die_cached(struct perf_stat_config *config, + struct perf_cpu cpu) +{ + return perf_stat__get_aggr(config, perf_stat__get_die, cpu); +} + +static struct aggr_cpu_id perf_stat__get_core_cached(struct perf_stat_config *config, + struct perf_cpu cpu) +{ + return perf_stat__get_aggr(config, perf_stat__get_core, cpu); +} + +static struct aggr_cpu_id perf_stat__get_node_cached(struct perf_stat_config *config, + struct perf_cpu cpu) +{ + return perf_stat__get_aggr(config, perf_stat__get_node, cpu); +} + +static bool term_percore_set(void) +{ + struct evsel *counter; + + evlist__for_each_entry(evsel_list, counter) { + if (counter->percore) + return true; + } + + return false; +} + +static aggr_cpu_id_get_t aggr_mode__get_aggr(enum aggr_mode aggr_mode) +{ + switch (aggr_mode) { + case AGGR_SOCKET: + return aggr_cpu_id__socket; + case AGGR_DIE: + return aggr_cpu_id__die; + case AGGR_CORE: + return aggr_cpu_id__core; + case AGGR_NODE: + return aggr_cpu_id__node; + case AGGR_NONE: + if (term_percore_set()) + return aggr_cpu_id__core; + + return NULL; + case AGGR_GLOBAL: + case AGGR_THREAD: + case AGGR_UNSET: + case AGGR_MAX: + default: + return NULL; + } +} + +static aggr_get_id_t aggr_mode__get_id(enum aggr_mode aggr_mode) +{ + switch (aggr_mode) { + case AGGR_SOCKET: + return perf_stat__get_socket_cached; + case AGGR_DIE: + return perf_stat__get_die_cached; + case AGGR_CORE: + return perf_stat__get_core_cached; + case AGGR_NODE: + return perf_stat__get_node_cached; + case AGGR_NONE: + if (term_percore_set()) { + return perf_stat__get_core_cached; + } + return NULL; + case AGGR_GLOBAL: + case AGGR_THREAD: + case AGGR_UNSET: + case AGGR_MAX: + default: + return NULL; + } +} + +static int perf_stat_init_aggr_mode(void) +{ + int nr; + aggr_cpu_id_get_t get_id = aggr_mode__get_aggr(stat_config.aggr_mode); + + if (get_id) { + stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus, + get_id, /*data=*/NULL); + if (!stat_config.aggr_map) { + pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]); + return -1; + } + stat_config.aggr_get_id = aggr_mode__get_id(stat_config.aggr_mode); + } + + /* + * The evsel_list->cpus is the base we operate on, + * taking the highest cpu number to be the size of + * the aggregation translate cpumap. + */ + if (!perf_cpu_map__empty(evsel_list->core.user_requested_cpus)) + nr = perf_cpu_map__max(evsel_list->core.user_requested_cpus).cpu; + else + nr = 0; + stat_config.cpus_aggr_map = cpu_aggr_map__empty_new(nr + 1); + return stat_config.cpus_aggr_map ? 0 : -ENOMEM; +} + +static void cpu_aggr_map__delete(struct cpu_aggr_map *map) +{ + if (map) { + WARN_ONCE(refcount_read(&map->refcnt) != 0, + "cpu_aggr_map refcnt unbalanced\n"); + free(map); + } +} + +static void cpu_aggr_map__put(struct cpu_aggr_map *map) +{ + if (map && refcount_dec_and_test(&map->refcnt)) + cpu_aggr_map__delete(map); +} + +static void perf_stat__exit_aggr_mode(void) +{ + cpu_aggr_map__put(stat_config.aggr_map); + cpu_aggr_map__put(stat_config.cpus_aggr_map); + stat_config.aggr_map = NULL; + stat_config.cpus_aggr_map = NULL; +} + +static struct aggr_cpu_id perf_env__get_socket_aggr_by_cpu(struct perf_cpu cpu, void *data) +{ + struct perf_env *env = data; + struct aggr_cpu_id id = aggr_cpu_id__empty(); + + if (cpu.cpu != -1) + id.socket = env->cpu[cpu.cpu].socket_id; + + return id; +} + +static struct aggr_cpu_id perf_env__get_die_aggr_by_cpu(struct perf_cpu cpu, void *data) +{ + struct perf_env *env = data; + struct aggr_cpu_id id = aggr_cpu_id__empty(); + + if (cpu.cpu != -1) { + /* + * die_id is relative to socket, so start + * with the socket ID and then add die to + * make a unique ID. + */ + id.socket = env->cpu[cpu.cpu].socket_id; + id.die = env->cpu[cpu.cpu].die_id; + } + + return id; +} + +static struct aggr_cpu_id perf_env__get_core_aggr_by_cpu(struct perf_cpu cpu, void *data) +{ + struct perf_env *env = data; + struct aggr_cpu_id id = aggr_cpu_id__empty(); + + if (cpu.cpu != -1) { + /* + * core_id is relative to socket and die, + * we need a global id. So we set + * socket, die id and core id + */ + id.socket = env->cpu[cpu.cpu].socket_id; + id.die = env->cpu[cpu.cpu].die_id; + id.core = env->cpu[cpu.cpu].core_id; + } + + return id; +} + +static struct aggr_cpu_id perf_env__get_node_aggr_by_cpu(struct perf_cpu cpu, void *data) +{ + struct aggr_cpu_id id = aggr_cpu_id__empty(); + + id.node = perf_env__numa_node(data, cpu); + return id; +} + +static struct aggr_cpu_id perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused, + struct perf_cpu cpu) +{ + return perf_env__get_socket_aggr_by_cpu(cpu, &perf_stat.session->header.env); +} +static struct aggr_cpu_id perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused, + struct perf_cpu cpu) +{ + return perf_env__get_die_aggr_by_cpu(cpu, &perf_stat.session->header.env); +} + +static struct aggr_cpu_id perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused, + struct perf_cpu cpu) +{ + return perf_env__get_core_aggr_by_cpu(cpu, &perf_stat.session->header.env); +} + +static struct aggr_cpu_id perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused, + struct perf_cpu cpu) +{ + return perf_env__get_node_aggr_by_cpu(cpu, &perf_stat.session->header.env); +} + +static aggr_cpu_id_get_t aggr_mode__get_aggr_file(enum aggr_mode aggr_mode) +{ + switch (aggr_mode) { + case AGGR_SOCKET: + return perf_env__get_socket_aggr_by_cpu; + case AGGR_DIE: + return perf_env__get_die_aggr_by_cpu; + case AGGR_CORE: + return perf_env__get_core_aggr_by_cpu; + case AGGR_NODE: + return perf_env__get_node_aggr_by_cpu; + case AGGR_NONE: + case AGGR_GLOBAL: + case AGGR_THREAD: + case AGGR_UNSET: + case AGGR_MAX: + default: + return NULL; + } +} + +static aggr_get_id_t aggr_mode__get_id_file(enum aggr_mode aggr_mode) +{ + switch (aggr_mode) { + case AGGR_SOCKET: + return perf_stat__get_socket_file; + case AGGR_DIE: + return perf_stat__get_die_file; + case AGGR_CORE: + return perf_stat__get_core_file; + case AGGR_NODE: + return perf_stat__get_node_file; + case AGGR_NONE: + case AGGR_GLOBAL: + case AGGR_THREAD: + case AGGR_UNSET: + case AGGR_MAX: + default: + return NULL; + } +} + +static int perf_stat_init_aggr_mode_file(struct perf_stat *st) +{ + struct perf_env *env = &st->session->header.env; + aggr_cpu_id_get_t get_id = aggr_mode__get_aggr_file(stat_config.aggr_mode); + + if (!get_id) + return 0; + + stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus, get_id, env); + if (!stat_config.aggr_map) { + pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]); + return -1; + } + stat_config.aggr_get_id = aggr_mode__get_id_file(stat_config.aggr_mode); + return 0; +} + +/* + * 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 perf_event_attr default_null_attrs[] = {}; + + /* Set attrs if no event is selected and !null_run: */ + if (stat_config.null_run) + return 0; + + if (transaction_run) { + struct parse_events_error errinfo; + /* Handle -T as -M transaction. Once platform specific metrics + * support has been added to the json files, all architectures + * will use this approach. To determine transaction support + * on an architecture test for such a metric name. + */ + if (metricgroup__has_metric("transaction")) { + return metricgroup__parse_groups(evsel_list, "transaction", + stat_config.metric_no_group, + stat_config.metric_no_merge, + stat_config.user_requested_cpu_list, + stat_config.system_wide, + &stat_config.metric_events); + } + + parse_events_error__init(&errinfo); + 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_error__print(&errinfo, transaction_attrs); + } + parse_events_error__exit(&errinfo); + return err ? -1 : 0; + } + + if (smi_cost) { + struct parse_events_error errinfo; + 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")) { + fprintf(stderr, "To measure SMI cost, it needs " + "msr/aperf/, msr/smi/ and cpu/cycles/ support\n"); + return -1; + } + if (!force_metric_only) + stat_config.metric_only = true; + + parse_events_error__init(&errinfo); + err = parse_events(evsel_list, smi_cost_attrs, &errinfo); + if (err) { + parse_events_error__print(&errinfo, smi_cost_attrs); + fprintf(stderr, "Cannot set up SMI cost events\n"); + } + parse_events_error__exit(&errinfo); + return err ? -1 : 0; + } + + if (topdown_run) { + const char **metric_attrs = topdown_metric_attrs; + unsigned int max_level = 1; + char *str = NULL; + bool warn = false; + const char *pmu_name = arch_get_topdown_pmu_name(evsel_list, true); + + if (!force_metric_only) + stat_config.metric_only = true; + + if (pmu_have_event(pmu_name, topdown_metric_L2_attrs[5])) { + metric_attrs = topdown_metric_L2_attrs; + max_level = 2; + } + + if (stat_config.topdown_level > max_level) { + pr_err("Invalid top-down metrics level. The max level is %u.\n", max_level); + return -1; + } else if (!stat_config.topdown_level) + stat_config.topdown_level = max_level; + + if (topdown_filter_events(metric_attrs, &str, 1, pmu_name) < 0) { + pr_err("Out of memory\n"); + return -1; + } + + if (metric_attrs[0] && str) { + if (!stat_config.interval && !stat_config.metric_only) { + fprintf(stat_config.output, + "Topdown accuracy may decrease when measuring long periods.\n" + "Please print the result regularly, e.g. -I1000\n"); + } + goto setup_metrics; + } + + zfree(&str); + + 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 (topdown_filter_events(topdown_attrs, &str, + arch_topdown_check_group(&warn), + pmu_name) < 0) { + pr_err("Out of memory\n"); + return -1; + } + + if (topdown_attrs[0] && str) { + struct parse_events_error errinfo; + if (warn) + arch_topdown_group_warn(); +setup_metrics: + parse_events_error__init(&errinfo); + err = parse_events(evsel_list, str, &errinfo); + if (err) { + fprintf(stderr, + "Cannot set up top down events %s: %d\n", + str, err); + parse_events_error__print(&errinfo, str); + parse_events_error__exit(&errinfo); + free(str); + return -1; + } + parse_events_error__exit(&errinfo); + } else { + fprintf(stderr, "System does not support topdown\n"); + return -1; + } + free(str); + } + + if (!stat_config.topdown_level) + stat_config.topdown_level = TOPDOWN_MAX_LEVEL; + + if (!evsel_list->core.nr_entries) { + if (target__has_cpu(&target)) + default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK; + + if (evlist__add_default_attrs(evsel_list, default_attrs0) < 0) + return -1; + if (pmu_have_event("cpu", "stalled-cycles-frontend")) { + if (evlist__add_default_attrs(evsel_list, frontend_attrs) < 0) + return -1; + } + if (pmu_have_event("cpu", "stalled-cycles-backend")) { + if (evlist__add_default_attrs(evsel_list, backend_attrs) < 0) + return -1; + } + if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0) + return -1; + /* Platform specific attrs */ + if (evlist__add_default_attrs(evsel_list, default_null_attrs) < 0) + return -1; + } + + /* Detailed events get appended to the event list: */ + + if (detailed_run < 1) + return 0; + + /* Append detailed run extra attributes: */ + if (evlist__add_default_attrs(evsel_list, detailed_attrs) < 0) + return -1; + + if (detailed_run < 2) + return 0; + + /* Append very detailed run extra attributes: */ + if (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 evlist__add_default_attrs(evsel_list, very_very_detailed_attrs); +} + +static const char * const stat_record_usage[] = { + "perf stat record [<options>]", + 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, NULL); + if (IS_ERR(session)) { + pr_err("Perf session creation failed\n"); + return PTR_ERR(session); + } + + 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 (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 const char * const stat_report_usage[] = { + "perf stat report [<options>]", + 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(0, "per-node", &perf_stat.aggr_mode, + "aggregate counts per numa node", AGGR_NODE), + 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__init_shadow_stats(); + + perf_stat.data.path = input_name; + perf_stat.data.mode = PERF_DATA_MODE_READ; + + session = perf_session__new(&perf_stat.data, &perf_stat.tool); + if (IS_ERR(session)) + return PTR_ERR(session); + + 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->core.requires_cpu && + strcmp(counter->name, "duration_time")) { + 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 [<options>] [<command>]", + NULL + }; + int status = -EINVAL, run_idx, err; + const char *mode; + FILE *output = stderr; + unsigned int interval, timeout; + const char * const stat_subcommands[] = { "record", "report" }; + char errbuf[BUFSIZ]; + + 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); + + 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 && strlen(argv[0]) > 2 && strstarts("record", argv[0])) { + argc = __cmd_record(argc, argv); + if (argc < 0) + return -1; + } else if (argc && strlen(argv[0]) > 2 && strstarts("report", argv[0])) + 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 && !quiet) { + 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; + + err = target__validate(&target); + if (err) { + target__strerror(&target, err, errbuf, BUFSIZ); + pr_warning("%s\n", errbuf); + } + + 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 || stat_config.cgroup_list)) && + !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); + parse_options_usage(NULL, stat_options, "for-each-cgroup", 0); + goto out; + } + + if (stat_config.iostat_run) { + status = iostat_prepare(evsel_list, &stat_config); + if (status) + goto out; + if (iostat_mode == IOSTAT_LIST) { + iostat_list(evsel_list, &stat_config); + goto out; + } else if (verbose) + iostat_list(evsel_list, &stat_config); + if (iostat_mode == IOSTAT_RUN && !target__has_cpu(&target)) + target.system_wide = true; + } + + if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide)) + target.per_thread = true; + + stat_config.system_wide = target.system_wide; + if (target.cpu_list) { + stat_config.user_requested_cpu_list = strdup(target.cpu_list); + if (!stat_config.user_requested_cpu_list) { + status = -ENOMEM; + goto out; + } + } + + /* + * Metric parsing needs to be delayed as metrics may optimize events + * knowing the target is system-wide. + */ + if (metrics) { + metricgroup__parse_groups(evsel_list, metrics, + stat_config.metric_no_group, + stat_config.metric_no_merge, + stat_config.user_requested_cpu_list, + stat_config.system_wide, + &stat_config.metric_events); + zfree(&metrics); + } + perf_stat__collect_metric_expr(evsel_list); + perf_stat__init_shadow_stats(); + + if (add_default_attributes()) + goto out; + + if (stat_config.cgroup_list) { + if (nr_cgroups > 0) { + pr_err("--cgroup and --for-each-cgroup cannot be used together\n"); + parse_options_usage(stat_usage, stat_options, "G", 1); + parse_options_usage(NULL, stat_options, "for-each-cgroup", 0); + goto out; + } + + if (evlist__expand_cgroup(evsel_list, stat_config.cgroup_list, + &stat_config.metric_events, true) < 0) { + parse_options_usage(stat_usage, stat_options, + "for-each-cgroup", 0); + goto out; + } + } + + if (evlist__fix_hybrid_cpus(evsel_list, target.cpu_list)) { + pr_err("failed to use cpu list %s\n", target.cpu_list); + goto out; + } + + target.hybrid = perf_pmu__has_hybrid(); + if (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; + } + + evlist__check_cpu_maps(evsel_list); + + /* + * 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 (stat_config.aggr_mode == AGGR_NODE) + cpu__setup_cpunode_map(); + + 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 (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); + + if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack)) + goto out; + + /* Enable ignoring missing threads when -p option is defined. */ + evlist__first(evsel_list)->ignore_missing_thread = target.pid; + 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); + + if (run_idx != 0) + evlist__reset_prev_raw_counts(evsel_list); + + status = run_perf_stat(argc, argv, run_idx); + if (forever && status != -1 && !interval) { + print_counters(NULL, argc, argv); + perf_stat__reset_stats(); + } + } + + if (!forever && status != -1 && (!interval || stat_config.summary)) + print_counters(NULL, argc, argv); + + evlist__finalize_ctlfd(evsel_list); + + 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 instead 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); + + 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(); + evlist__free_stats(evsel_list); +out: + if (stat_config.iostat_run) + iostat_release(evsel_list); + + zfree(&stat_config.walltime_run); + zfree(&stat_config.user_requested_cpu_list); + + if (smi_cost && smi_reset) + sysfs__write_int(FREEZE_ON_SMI_PATH, 0); + + evlist__delete(evsel_list); + + metricgroup__rblist_exit(&stat_config.metric_events); + evlist__close_control(stat_config.ctl_fd, stat_config.ctl_fd_ack, &stat_config.ctl_fd_close); + + return status; +} |