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- // 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/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 "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 *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,
- .ctl_fd = -1,
- .ctl_fd_ack = -1
- };
- 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 (a->core.cpus->nr != b->core.cpus->nr)
- return false;
- for (int i = 0; i < a->core.cpus->nr; i++) {
- if (a->core.cpus->map[i] != b->core.cpus->map[i])
- return false;
- }
- return true;
- }
- static void evlist__check_cpu_maps(struct evlist *evlist)
- {
- struct evsel *evsel, *pos, *leader;
- char buf[1024];
- evlist__for_each_entry(evlist, evsel) {
- leader = evsel->leader;
- /* 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) {
- pos->leader = pos;
- pos->core.nr_members = 0;
- }
- evsel->leader->core.nr_members = 0;
- }
- }
- 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->core.sample_id, x, y)
- static int 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 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_cpu(struct evsel *counter, struct timespec *rs, int cpu)
- {
- int nthreads = perf_thread_map__nr(evsel_list->core.threads);
- int thread;
- if (!counter->supported)
- return -ENOENT;
- if (counter->core.system_wide)
- nthreads = 1;
- for (thread = 0; thread < nthreads; thread++) {
- struct perf_counts_values *count;
- count = perf_counts(counter->counts, cpu, 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, 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 (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",
- evsel__name(counter),
- cpu,
- count->val, count->ena, count->run);
- }
- }
- return 0;
- }
- static int read_affinity_counters(struct timespec *rs)
- {
- struct evsel *counter;
- struct affinity affinity;
- int i, ncpus, cpu;
- if (affinity__setup(&affinity) < 0)
- return -1;
- ncpus = perf_cpu_map__nr(evsel_list->core.all_cpus);
- if (!target__has_cpu(&target) || target__has_per_thread(&target))
- ncpus = 1;
- evlist__for_each_cpu(evsel_list, i, cpu) {
- if (i >= ncpus)
- break;
- affinity__set(&affinity, cpu);
- evlist__for_each_entry(evsel_list, counter) {
- if (evsel__cpu_iter_skip(counter, cpu))
- continue;
- if (!counter->err) {
- counter->err = read_counter_cpu(counter, rs,
- counter->cpu_iter - 1);
- }
- }
- }
- affinity__cleanup(&affinity);
- return 0;
- }
- static void read_counters(struct timespec *rs)
- {
- struct evsel *counter;
- if (!stat_config.stop_read_counter && (read_affinity_counters(rs) < 0))
- 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 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 void runtime_stat_reset(struct perf_stat_config *config)
- {
- int i;
- if (!config->stats)
- return;
- for (i = 0; i < config->stats_num; i++)
- perf_stat__reset_shadow_per_stat(&config->stats[i]);
- }
- 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);
- runtime_stat_reset(&stat_config);
- 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 void enable_counters(void)
- {
- if (stat_config.initial_delay < 0) {
- pr_info(EVLIST_DISABLED_MSG);
- return;
- }
- if (stat_config.initial_delay > 0) {
- pr_info(EVLIST_DISABLED_MSG);
- 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);
- if (stat_config.initial_delay > 0)
- pr_info(EVLIST_ENABLED_MSG);
- }
- }
- 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 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:
- pr_info(EVLIST_ENABLED_MSG);
- if (interval)
- process_interval();
- break;
- case EVLIST_CTL_CMD_DISABLE:
- if (interval)
- process_interval();
- pr_info(EVLIST_DISABLED_MSG);
- break;
- case EVLIST_CTL_CMD_SNAPSHOT:
- case EVLIST_CTL_CMD_ACK:
- case EVLIST_CTL_CMD_UNSUPPORTED:
- 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 ((counter->leader != counter) ||
- !(counter->leader->core.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 affinity affinity;
- int i, cpu;
- bool second_pass = false;
- 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);
- if (affinity__setup(&affinity) < 0)
- return -1;
- evlist__for_each_cpu (evsel_list, i, cpu) {
- affinity__set(&affinity, cpu);
- evlist__for_each_entry(evsel_list, counter) {
- if (evsel__cpu_iter_skip(counter, cpu))
- continue;
- if (counter->reset_group || counter->errored)
- continue;
- try_again:
- if (create_perf_stat_counter(counter, &stat_config, &target,
- counter->cpu_iter - 1) < 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) &&
- counter->leader != counter &&
- counter->weak_group) {
- perf_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.
- */
- evlist__for_each_cpu(evsel_list, i, cpu) {
- affinity__set(&affinity, cpu);
- /* First close errored or weak retry */
- evlist__for_each_entry(evsel_list, counter) {
- if (!counter->reset_group && !counter->errored)
- continue;
- if (evsel__cpu_iter_skip_no_inc(counter, cpu))
- continue;
- perf_evsel__close_cpu(&counter->core, counter->cpu_iter);
- }
- /* Now reopen weak */
- evlist__for_each_entry(evsel_list, counter) {
- if (!counter->reset_group && !counter->errored)
- continue;
- if (evsel__cpu_iter_skip(counter, cpu))
- continue;
- 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,
- counter->cpu_iter - 1) < 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 (perf_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 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_event__synthesize_stat_events(&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 || 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 {
- enable_counters();
- 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)
- perf_evlist__save_aggr_prev_raw_counts(evsel_list);
- perf_evlist__copy_prev_raw_counts(evsel_list);
- perf_evlist__reset_prev_raw_counts(evsel_list);
- runtime_stat_reset(&stat_config);
- perf_stat__reset_shadow_per_stat(&rt_stat);
- } else
- 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);
- }
- void perf_stat__set_big_num(int set)
- {
- stat_config.big_num = (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 parse_metric_groups(const struct option *opt,
- const char *str,
- int unset __maybe_unused)
- {
- return metricgroup__parse_groups(opt, str,
- stat_config.metric_no_group,
- stat_config.metric_no_merge,
- &stat_config.metric_events);
- }
- 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 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_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", &stat_config.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 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_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"),
- #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_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 perf_stat__get_node(struct perf_stat_config *config __maybe_unused,
- struct perf_cpu_map *map, int cpu)
- {
- return cpu_map__get_node(map, cpu, NULL);
- }
- 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 int perf_stat__get_node_cached(struct perf_stat_config *config,
- struct perf_cpu_map *map, int idx)
- {
- return perf_stat__get_aggr(config, perf_stat__get_node, 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_NODE:
- if (cpu_map__build_node_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
- perror("cannot build core map");
- return -1;
- }
- stat_config.aggr_get_id = perf_stat__get_node_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 = perf_cpu_map__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__get_node(struct perf_cpu_map *map, int idx, void *data)
- {
- int cpu = perf_env__get_cpu(data, map, idx);
- return perf_env__numa_node(data, cpu);
- }
- 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_env__build_node_map(struct perf_env *env, struct perf_cpu_map *cpus,
- struct perf_cpu_map **nodep)
- {
- return cpu_map__build_map(cpus, nodep, perf_env__get_node, 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__get_node_file(struct perf_stat_config *config __maybe_unused,
- struct perf_cpu_map *map, int idx)
- {
- return perf_env__get_node(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_NODE:
- if (perf_env__build_node_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_node_file;
- break;
- case AGGR_NONE:
- case AGGR_GLOBAL:
- case AGGR_THREAD:
- case AGGR_UNSET:
- default:
- break;
- }
- 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 parse_events_error errinfo;
- /* Set attrs if no event is selected and !null_run: */
- if (stat_config.null_run)
- return 0;
- bzero(&errinfo, sizeof(errinfo));
- 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_no_group,
- stat_config.metric_no_merge,
- &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) {
- parse_events_print_error(&errinfo, smi_cost_attrs);
- fprintf(stderr, "Cannot set up SMI cost events\n");
- return -1;
- }
- return 0;
- }
- if (topdown_run) {
- char *str = NULL;
- bool warn = false;
- if (!force_metric_only)
- stat_config.metric_only = true;
- if (topdown_filter_events(topdown_metric_attrs, &str, 1) < 0) {
- pr_err("Out of memory\n");
- return -1;
- }
- if (topdown_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)) < 0) {
- pr_err("Out of memory\n");
- return -1;
- }
- if (topdown_attrs[0] && str) {
- if (warn)
- arch_topdown_group_warn();
- setup_metrics:
- 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 (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;
- }
- /* 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, false, 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 (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 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.data.path = input_name;
- perf_stat.data.mode = PERF_DATA_MODE_READ;
- session = perf_session__new(&perf_stat.data, false, &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.system_wide &&
- 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;
- 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;
- 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)
- 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;
- }
- 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 (target.system_wide) {
- if (runtime_stat_new(&stat_config,
- perf_thread_map__nr(evsel_list->core.threads))) {
- goto out;
- }
- }
- }
- 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 (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);
- if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack))
- goto out;
- 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)
- perf_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 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);
- metricgroup__rblist_exit(&stat_config.metric_events);
- runtime_stat_delete(&stat_config);
- evlist__close_control(stat_config.ctl_fd, stat_config.ctl_fd_ack, &stat_config.ctl_fd_close);
- return status;
- }
|