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- /*
- * 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>
- *
- * Released under the GPL v2. (and only v2, not any later version)
- */
- #include "perf.h"
- #include "builtin.h"
- #include "util/cgroup.h"
- #include "util/util.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/drv_configs.h"
- #include "util/color.h"
- #include "util/stat.h"
- #include "util/header.h"
- #include "util/cpumap.h"
- #include "util/thread.h"
- #include "util/thread_map.h"
- #include "util/counts.h"
- #include "util/group.h"
- #include "util/session.h"
- #include "util/tool.h"
- #include "util/group.h"
- #include "asm/bug.h"
- #include <linux/time64.h>
- #include <api/fs/fs.h>
- #include <stdlib.h>
- #include <sys/prctl.h>
- #include <locale.h>
- #include <math.h>
- #define DEFAULT_SEPARATOR " "
- #define CNTR_NOT_SUPPORTED "<not supported>"
- #define CNTR_NOT_COUNTED "<not counted>"
- 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 struct perf_evlist *evsel_list;
- static struct target target = {
- .uid = UINT_MAX,
- };
- typedef int (*aggr_get_id_t)(struct cpu_map *m, int cpu);
- static int run_count = 1;
- static bool no_inherit = false;
- static volatile pid_t child_pid = -1;
- static bool null_run = false;
- static int detailed_run = 0;
- static bool transaction_run;
- static bool topdown_run = false;
- static bool big_num = true;
- static int big_num_opt = -1;
- static const char *csv_sep = NULL;
- static bool csv_output = false;
- static bool group = false;
- static const char *pre_cmd = NULL;
- static const char *post_cmd = NULL;
- static bool sync_run = false;
- static unsigned int initial_delay = 0;
- static unsigned int unit_width = 4; /* strlen("unit") */
- static bool forever = false;
- static bool metric_only = false;
- static bool force_metric_only = false;
- static struct timespec ref_time;
- static struct cpu_map *aggr_map;
- static aggr_get_id_t aggr_get_id;
- static bool append_file;
- static const char *output_name;
- static int output_fd;
- struct perf_stat {
- bool record;
- struct perf_data_file file;
- struct perf_session *session;
- u64 bytes_written;
- struct perf_tool tool;
- bool maps_allocated;
- struct cpu_map *cpus;
- struct 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,
- };
- 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)
- {
- perf_evlist__reset_stats(evsel_list);
- perf_stat__reset_shadow_stats();
- }
- static int create_perf_stat_counter(struct perf_evsel *evsel)
- {
- struct perf_event_attr *attr = &evsel->attr;
- if (stat_config.scale)
- attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
- PERF_FORMAT_TOTAL_TIME_RUNNING;
- attr->inherit = !no_inherit;
- /*
- * Some events get initialized with sample_(period/type) set,
- * like tracepoints. Clear it up for counting.
- */
- attr->sample_period = 0;
- /*
- * But 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.
- */
- if (!(STAT_RECORD && perf_stat.file.is_pipe))
- attr->sample_type = PERF_SAMPLE_IDENTIFIER;
- /*
- * Disabling all counters initially, they will be enabled
- * either manually by us or by kernel via enable_on_exec
- * set later.
- */
- if (perf_evsel__is_group_leader(evsel)) {
- attr->disabled = 1;
- /*
- * In case of initial_delay we enable tracee
- * events manually.
- */
- if (target__none(&target) && !initial_delay)
- attr->enable_on_exec = 1;
- }
- if (target__has_cpu(&target))
- return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
- return perf_evsel__open_per_thread(evsel, evsel_list->threads);
- }
- /*
- * Does the counter have nsecs as a unit?
- */
- static inline int nsec_counter(struct perf_evsel *evsel)
- {
- if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
- perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
- return 1;
- return 0;
- }
- 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_file__write(&perf_stat.file, event, event->header.size) < 0) {
- pr_err("failed to write perf data, error: %m\n");
- return -1;
- }
- perf_stat.bytes_written += event->header.size;
- return 0;
- }
- static int write_stat_round_event(u64 tm, u64 type)
- {
- return perf_event__synthesize_stat_round(NULL, tm, type,
- process_synthesized_event,
- NULL);
- }
- #define WRITE_STAT_ROUND_EVENT(time, interval) \
- write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
- #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
- static int
- perf_evsel__write_stat_event(struct perf_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);
- }
- /*
- * Read out the results of a single counter:
- * do not aggregate counts across CPUs in system-wide mode
- */
- static int read_counter(struct perf_evsel *counter)
- {
- int nthreads = thread_map__nr(evsel_list->threads);
- int ncpus, cpu, thread;
- if (target__has_cpu(&target))
- ncpus = perf_evsel__nr_cpus(counter);
- else
- ncpus = 1;
- if (!counter->supported)
- return -ENOENT;
- if (counter->system_wide)
- nthreads = 1;
- for (thread = 0; thread < nthreads; thread++) {
- for (cpu = 0; cpu < ncpus; cpu++) {
- struct perf_counts_values *count;
- count = perf_counts(counter->counts, cpu, thread);
- if (perf_evsel__read(counter, cpu, thread, count))
- return -1;
- if (STAT_RECORD) {
- if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
- pr_err("failed to write stat event\n");
- return -1;
- }
- }
- if (verbose > 1) {
- fprintf(stat_config.output,
- "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
- perf_evsel__name(counter),
- cpu,
- count->val, count->ena, count->run);
- }
- }
- }
- return 0;
- }
- static void read_counters(void)
- {
- struct perf_evsel *counter;
- evlist__for_each_entry(evsel_list, counter) {
- if (read_counter(counter))
- pr_debug("failed to read counter %s\n", counter->name);
- if (perf_stat_process_counter(&stat_config, counter))
- pr_warning("failed to process counter %s\n", counter->name);
- }
- }
- static void process_interval(void)
- {
- struct timespec ts, rs;
- read_counters();
- clock_gettime(CLOCK_MONOTONIC, &ts);
- diff_timespec(&rs, &ts, &ref_time);
- 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");
- }
- print_counters(&rs, 0, NULL);
- }
- static void enable_counters(void)
- {
- if (initial_delay)
- usleep(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) || initial_delay)
- perf_evlist__enable(evsel_list);
- }
- static void disable_counters(void)
- {
- /*
- * If we don't have tracee (attaching to task or cpu), counters may
- * still be running. To get accurate group ratios, we must stop groups
- * from counting before reading their constituent counters.
- */
- if (!target__none(&target))
- perf_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 has_unit(struct perf_evsel *counter)
- {
- return counter->unit && *counter->unit;
- }
- static bool has_scale(struct perf_evsel *counter)
- {
- return counter->scale != 1;
- }
- static int perf_stat_synthesize_config(bool is_pipe)
- {
- struct perf_evsel *counter;
- int err;
- if (is_pipe) {
- err = perf_event__synthesize_attrs(NULL, perf_stat.session,
- process_synthesized_event);
- if (err < 0) {
- pr_err("Couldn't synthesize attrs.\n");
- return err;
- }
- }
- /*
- * Synthesize other events stuff not carried within
- * attr event - unit, scale, name
- */
- evlist__for_each_entry(evsel_list, counter) {
- if (!counter->supported)
- continue;
- /*
- * Synthesize unit and scale only if it's defined.
- */
- if (has_unit(counter)) {
- err = perf_event__synthesize_event_update_unit(NULL, counter, process_synthesized_event);
- if (err < 0) {
- pr_err("Couldn't synthesize evsel unit.\n");
- return err;
- }
- }
- if (has_scale(counter)) {
- err = perf_event__synthesize_event_update_scale(NULL, counter, process_synthesized_event);
- if (err < 0) {
- pr_err("Couldn't synthesize evsel scale.\n");
- return err;
- }
- }
- if (counter->own_cpus) {
- err = perf_event__synthesize_event_update_cpus(NULL, counter, process_synthesized_event);
- if (err < 0) {
- pr_err("Couldn't synthesize evsel scale.\n");
- return err;
- }
- }
- /*
- * Name is needed only for pipe output,
- * perf.data carries event names.
- */
- if (is_pipe) {
- err = perf_event__synthesize_event_update_name(NULL, counter, process_synthesized_event);
- if (err < 0) {
- pr_err("Couldn't synthesize evsel name.\n");
- return err;
- }
- }
- }
- err = perf_event__synthesize_thread_map2(NULL, evsel_list->threads,
- process_synthesized_event,
- NULL);
- if (err < 0) {
- pr_err("Couldn't synthesize thread map.\n");
- return err;
- }
- err = perf_event__synthesize_cpu_map(NULL, evsel_list->cpus,
- process_synthesized_event, NULL);
- if (err < 0) {
- pr_err("Couldn't synthesize thread map.\n");
- return err;
- }
- err = perf_event__synthesize_stat_config(NULL, &stat_config,
- process_synthesized_event, NULL);
- if (err < 0) {
- pr_err("Couldn't synthesize config.\n");
- return err;
- }
- return 0;
- }
- #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
- static int __store_counter_ids(struct perf_evsel *counter,
- struct cpu_map *cpus,
- struct thread_map *threads)
- {
- int cpu, thread;
- for (cpu = 0; cpu < cpus->nr; cpu++) {
- for (thread = 0; thread < threads->nr; thread++) {
- int fd = FD(counter, cpu, thread);
- if (perf_evlist__id_add_fd(evsel_list, counter,
- cpu, thread, fd) < 0)
- return -1;
- }
- }
- return 0;
- }
- static int store_counter_ids(struct perf_evsel *counter)
- {
- struct cpu_map *cpus = counter->cpus;
- struct thread_map *threads = counter->threads;
- if (perf_evsel__alloc_id(counter, cpus->nr, threads->nr))
- return -ENOMEM;
- return __store_counter_ids(counter, cpus, threads);
- }
- static int __run_perf_stat(int argc, const char **argv)
- {
- int interval = stat_config.interval;
- char msg[512];
- unsigned long long t0, t1;
- struct perf_evsel *counter;
- struct timespec ts;
- size_t l;
- int status = 0;
- const bool forks = (argc > 0);
- bool is_pipe = STAT_RECORD ? perf_stat.file.is_pipe : false;
- struct perf_evsel_config_term *err_term;
- if (interval) {
- ts.tv_sec = interval / USEC_PER_MSEC;
- ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
- } else {
- ts.tv_sec = 1;
- ts.tv_nsec = 0;
- }
- if (forks) {
- if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
- workload_exec_failed_signal) < 0) {
- perror("failed to prepare workload");
- return -1;
- }
- child_pid = evsel_list->workload.pid;
- }
- if (group)
- perf_evlist__set_leader(evsel_list);
- evlist__for_each_entry(evsel_list, counter) {
- try_again:
- if (create_perf_stat_counter(counter) < 0) {
- /*
- * 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)
- ui__warning("%s event is not supported by the kernel.\n",
- perf_evsel__name(counter));
- counter->supported = false;
- if ((counter->leader != counter) ||
- !(counter->leader->nr_members > 1))
- continue;
- } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
- if (verbose)
- ui__warning("%s\n", msg);
- goto try_again;
- }
- perf_evsel__open_strerror(counter, &target,
- errno, msg, sizeof(msg));
- ui__error("%s\n", msg);
- if (child_pid != -1)
- kill(child_pid, SIGTERM);
- return -1;
- }
- counter->supported = true;
- l = strlen(counter->unit);
- if (l > unit_width)
- unit_width = l;
- if (STAT_RECORD && store_counter_ids(counter))
- return -1;
- }
- if (perf_evlist__apply_filters(evsel_list, &counter)) {
- error("failed to set filter \"%s\" on event %s with %d (%s)\n",
- counter->filter, perf_evsel__name(counter), errno,
- str_error_r(errno, msg, sizeof(msg)));
- return -1;
- }
- if (perf_evlist__apply_drv_configs(evsel_list, &counter, &err_term)) {
- error("failed to set config \"%s\" on event %s with %d (%s)\n",
- err_term->val.drv_cfg, perf_evsel__name(counter), errno,
- str_error_r(errno, msg, sizeof(msg)));
- return -1;
- }
- if (STAT_RECORD) {
- int err, fd = perf_data_file__fd(&perf_stat.file);
- if (is_pipe) {
- err = perf_header__write_pipe(perf_data_file__fd(&perf_stat.file));
- } else {
- err = perf_session__write_header(perf_stat.session, evsel_list,
- fd, false);
- }
- if (err < 0)
- return err;
- err = perf_stat_synthesize_config(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) {
- while (!waitpid(child_pid, &status, WNOHANG)) {
- nanosleep(&ts, NULL);
- process_interval();
- }
- }
- wait(&status);
- if (workload_exec_errno) {
- const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
- pr_err("Workload failed: %s\n", emsg);
- return -1;
- }
- if (WIFSIGNALED(status))
- psignal(WTERMSIG(status), argv[0]);
- } else {
- enable_counters();
- while (!done) {
- nanosleep(&ts, NULL);
- if (interval)
- process_interval();
- }
- }
- disable_counters();
- t1 = rdclock();
- 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();
- perf_evlist__close(evsel_list);
- return WEXITSTATUS(status);
- }
- static int run_perf_stat(int argc, const char **argv)
- {
- int ret;
- if (pre_cmd) {
- ret = system(pre_cmd);
- if (ret)
- return ret;
- }
- if (sync_run)
- sync();
- ret = __run_perf_stat(argc, argv);
- if (ret)
- return ret;
- if (post_cmd) {
- ret = system(post_cmd);
- if (ret)
- return ret;
- }
- return ret;
- }
- static void print_running(u64 run, u64 ena)
- {
- if (csv_output) {
- fprintf(stat_config.output, "%s%" PRIu64 "%s%.2f",
- csv_sep,
- run,
- csv_sep,
- ena ? 100.0 * run / ena : 100.0);
- } else if (run != ena) {
- fprintf(stat_config.output, " (%.2f%%)", 100.0 * run / ena);
- }
- }
- static void print_noise_pct(double total, double avg)
- {
- double pct = rel_stddev_stats(total, avg);
- if (csv_output)
- fprintf(stat_config.output, "%s%.2f%%", csv_sep, pct);
- else if (pct)
- fprintf(stat_config.output, " ( +-%6.2f%% )", pct);
- }
- static void print_noise(struct perf_evsel *evsel, double avg)
- {
- struct perf_stat_evsel *ps;
- if (run_count == 1)
- return;
- ps = evsel->priv;
- print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
- }
- static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
- {
- switch (stat_config.aggr_mode) {
- case AGGR_CORE:
- fprintf(stat_config.output, "S%d-C%*d%s%*d%s",
- cpu_map__id_to_socket(id),
- csv_output ? 0 : -8,
- cpu_map__id_to_cpu(id),
- csv_sep,
- csv_output ? 0 : 4,
- nr,
- csv_sep);
- break;
- case AGGR_SOCKET:
- fprintf(stat_config.output, "S%*d%s%*d%s",
- csv_output ? 0 : -5,
- id,
- csv_sep,
- csv_output ? 0 : 4,
- nr,
- csv_sep);
- break;
- case AGGR_NONE:
- fprintf(stat_config.output, "CPU%*d%s",
- csv_output ? 0 : -4,
- perf_evsel__cpus(evsel)->map[id], csv_sep);
- break;
- case AGGR_THREAD:
- fprintf(stat_config.output, "%*s-%*d%s",
- csv_output ? 0 : 16,
- thread_map__comm(evsel->threads, id),
- csv_output ? 0 : -8,
- thread_map__pid(evsel->threads, id),
- csv_sep);
- break;
- case AGGR_GLOBAL:
- case AGGR_UNSET:
- default:
- break;
- }
- }
- struct outstate {
- FILE *fh;
- bool newline;
- const char *prefix;
- int nfields;
- int id, nr;
- struct perf_evsel *evsel;
- };
- #define METRIC_LEN 35
- static void new_line_std(void *ctx)
- {
- struct outstate *os = ctx;
- os->newline = true;
- }
- static void do_new_line_std(struct outstate *os)
- {
- fputc('\n', os->fh);
- fputs(os->prefix, os->fh);
- aggr_printout(os->evsel, os->id, os->nr);
- if (stat_config.aggr_mode == AGGR_NONE)
- fprintf(os->fh, " ");
- fprintf(os->fh, " ");
- }
- static void print_metric_std(void *ctx, const char *color, const char *fmt,
- const char *unit, double val)
- {
- struct outstate *os = ctx;
- FILE *out = os->fh;
- int n;
- bool newline = os->newline;
- os->newline = false;
- if (unit == NULL || fmt == NULL) {
- fprintf(out, "%-*s", METRIC_LEN, "");
- return;
- }
- if (newline)
- do_new_line_std(os);
- n = fprintf(out, " # ");
- if (color)
- n += color_fprintf(out, color, fmt, val);
- else
- n += fprintf(out, fmt, val);
- fprintf(out, " %-*s", METRIC_LEN - n - 1, unit);
- }
- static void new_line_csv(void *ctx)
- {
- struct outstate *os = ctx;
- int i;
- fputc('\n', os->fh);
- if (os->prefix)
- fprintf(os->fh, "%s%s", os->prefix, csv_sep);
- aggr_printout(os->evsel, os->id, os->nr);
- for (i = 0; i < os->nfields; i++)
- fputs(csv_sep, os->fh);
- }
- static void print_metric_csv(void *ctx,
- const char *color __maybe_unused,
- const char *fmt, const char *unit, double val)
- {
- struct outstate *os = ctx;
- FILE *out = os->fh;
- char buf[64], *vals, *ends;
- if (unit == NULL || fmt == NULL) {
- fprintf(out, "%s%s%s%s", csv_sep, csv_sep, csv_sep, csv_sep);
- return;
- }
- snprintf(buf, sizeof(buf), fmt, val);
- vals = buf;
- while (isspace(*vals))
- vals++;
- ends = vals;
- while (isdigit(*ends) || *ends == '.')
- ends++;
- *ends = 0;
- while (isspace(*unit))
- unit++;
- fprintf(out, "%s%s%s%s", csv_sep, vals, csv_sep, unit);
- }
- #define METRIC_ONLY_LEN 20
- /* Filter out some columns that don't work well in metrics only mode */
- static bool valid_only_metric(const char *unit)
- {
- if (!unit)
- return false;
- if (strstr(unit, "/sec") ||
- strstr(unit, "hz") ||
- strstr(unit, "Hz") ||
- strstr(unit, "CPUs utilized"))
- return false;
- return true;
- }
- static const char *fixunit(char *buf, struct perf_evsel *evsel,
- const char *unit)
- {
- if (!strncmp(unit, "of all", 6)) {
- snprintf(buf, 1024, "%s %s", perf_evsel__name(evsel),
- unit);
- return buf;
- }
- return unit;
- }
- static void print_metric_only(void *ctx, const char *color, const char *fmt,
- const char *unit, double val)
- {
- struct outstate *os = ctx;
- FILE *out = os->fh;
- int n;
- char buf[1024];
- unsigned mlen = METRIC_ONLY_LEN;
- if (!valid_only_metric(unit))
- return;
- unit = fixunit(buf, os->evsel, unit);
- if (color)
- n = color_fprintf(out, color, fmt, val);
- else
- n = fprintf(out, fmt, val);
- if (n > METRIC_ONLY_LEN)
- n = METRIC_ONLY_LEN;
- if (mlen < strlen(unit))
- mlen = strlen(unit) + 1;
- fprintf(out, "%*s", mlen - n, "");
- }
- static void print_metric_only_csv(void *ctx, const char *color __maybe_unused,
- const char *fmt,
- const char *unit, double val)
- {
- struct outstate *os = ctx;
- FILE *out = os->fh;
- char buf[64], *vals, *ends;
- char tbuf[1024];
- if (!valid_only_metric(unit))
- return;
- unit = fixunit(tbuf, os->evsel, unit);
- snprintf(buf, sizeof buf, fmt, val);
- vals = buf;
- while (isspace(*vals))
- vals++;
- ends = vals;
- while (isdigit(*ends) || *ends == '.')
- ends++;
- *ends = 0;
- fprintf(out, "%s%s", vals, csv_sep);
- }
- static void new_line_metric(void *ctx __maybe_unused)
- {
- }
- static void print_metric_header(void *ctx, const char *color __maybe_unused,
- const char *fmt __maybe_unused,
- const char *unit, double val __maybe_unused)
- {
- struct outstate *os = ctx;
- char tbuf[1024];
- if (!valid_only_metric(unit))
- return;
- unit = fixunit(tbuf, os->evsel, unit);
- if (csv_output)
- fprintf(os->fh, "%s%s", unit, csv_sep);
- else
- fprintf(os->fh, "%-*s ", METRIC_ONLY_LEN, unit);
- }
- static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
- {
- FILE *output = stat_config.output;
- double msecs = avg / NSEC_PER_MSEC;
- const char *fmt_v, *fmt_n;
- char name[25];
- fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
- fmt_n = csv_output ? "%s" : "%-25s";
- aggr_printout(evsel, id, nr);
- scnprintf(name, sizeof(name), "%s%s",
- perf_evsel__name(evsel), csv_output ? "" : " (msec)");
- fprintf(output, fmt_v, msecs, csv_sep);
- if (csv_output)
- fprintf(output, "%s%s", evsel->unit, csv_sep);
- else
- fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
- fprintf(output, fmt_n, name);
- if (evsel->cgrp)
- fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
- }
- static int first_shadow_cpu(struct perf_evsel *evsel, int id)
- {
- int i;
- if (!aggr_get_id)
- return 0;
- if (stat_config.aggr_mode == AGGR_NONE)
- return id;
- if (stat_config.aggr_mode == AGGR_GLOBAL)
- return 0;
- for (i = 0; i < perf_evsel__nr_cpus(evsel); i++) {
- int cpu2 = perf_evsel__cpus(evsel)->map[i];
- if (aggr_get_id(evsel_list->cpus, cpu2) == id)
- return cpu2;
- }
- return 0;
- }
- static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
- {
- FILE *output = stat_config.output;
- double sc = evsel->scale;
- const char *fmt;
- if (csv_output) {
- fmt = floor(sc) != sc ? "%.2f%s" : "%.0f%s";
- } else {
- if (big_num)
- fmt = floor(sc) != sc ? "%'18.2f%s" : "%'18.0f%s";
- else
- fmt = floor(sc) != sc ? "%18.2f%s" : "%18.0f%s";
- }
- aggr_printout(evsel, id, nr);
- fprintf(output, fmt, avg, csv_sep);
- if (evsel->unit)
- fprintf(output, "%-*s%s",
- csv_output ? 0 : unit_width,
- evsel->unit, csv_sep);
- fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
- if (evsel->cgrp)
- fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
- }
- static void printout(int id, int nr, struct perf_evsel *counter, double uval,
- char *prefix, u64 run, u64 ena, double noise)
- {
- struct perf_stat_output_ctx out;
- struct outstate os = {
- .fh = stat_config.output,
- .prefix = prefix ? prefix : "",
- .id = id,
- .nr = nr,
- .evsel = counter,
- };
- print_metric_t pm = print_metric_std;
- void (*nl)(void *);
- if (metric_only) {
- nl = new_line_metric;
- if (csv_output)
- pm = print_metric_only_csv;
- else
- pm = print_metric_only;
- } else
- nl = new_line_std;
- if (csv_output && !metric_only) {
- static int aggr_fields[] = {
- [AGGR_GLOBAL] = 0,
- [AGGR_THREAD] = 1,
- [AGGR_NONE] = 1,
- [AGGR_SOCKET] = 2,
- [AGGR_CORE] = 2,
- };
- pm = print_metric_csv;
- nl = new_line_csv;
- os.nfields = 3;
- os.nfields += aggr_fields[stat_config.aggr_mode];
- if (counter->cgrp)
- os.nfields++;
- }
- if (run == 0 || ena == 0 || counter->counts->scaled == -1) {
- if (metric_only) {
- pm(&os, NULL, "", "", 0);
- return;
- }
- aggr_printout(counter, id, nr);
- fprintf(stat_config.output, "%*s%s",
- csv_output ? 0 : 18,
- counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
- csv_sep);
- fprintf(stat_config.output, "%-*s%s",
- csv_output ? 0 : unit_width,
- counter->unit, csv_sep);
- fprintf(stat_config.output, "%*s",
- csv_output ? 0 : -25,
- perf_evsel__name(counter));
- if (counter->cgrp)
- fprintf(stat_config.output, "%s%s",
- csv_sep, counter->cgrp->name);
- if (!csv_output)
- pm(&os, NULL, NULL, "", 0);
- print_noise(counter, noise);
- print_running(run, ena);
- if (csv_output)
- pm(&os, NULL, NULL, "", 0);
- return;
- }
- if (metric_only)
- /* nothing */;
- else if (nsec_counter(counter))
- nsec_printout(id, nr, counter, uval);
- else
- abs_printout(id, nr, counter, uval);
- out.print_metric = pm;
- out.new_line = nl;
- out.ctx = &os;
- if (csv_output && !metric_only) {
- print_noise(counter, noise);
- print_running(run, ena);
- }
- perf_stat__print_shadow_stats(counter, uval,
- first_shadow_cpu(counter, id),
- &out);
- if (!csv_output && !metric_only) {
- print_noise(counter, noise);
- print_running(run, ena);
- }
- }
- static void aggr_update_shadow(void)
- {
- int cpu, s2, id, s;
- u64 val;
- struct perf_evsel *counter;
- for (s = 0; s < aggr_map->nr; s++) {
- id = aggr_map->map[s];
- evlist__for_each_entry(evsel_list, counter) {
- val = 0;
- for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
- s2 = aggr_get_id(evsel_list->cpus, cpu);
- if (s2 != id)
- continue;
- val += perf_counts(counter->counts, cpu, 0)->val;
- }
- val = val * counter->scale;
- perf_stat__update_shadow_stats(counter, &val,
- first_shadow_cpu(counter, id));
- }
- }
- }
- static void print_aggr(char *prefix)
- {
- FILE *output = stat_config.output;
- struct perf_evsel *counter;
- int cpu, s, s2, id, nr;
- double uval;
- u64 ena, run, val;
- bool first;
- if (!(aggr_map || aggr_get_id))
- return;
- aggr_update_shadow();
- /*
- * With metric_only everything is on a single line.
- * Without each counter has its own line.
- */
- for (s = 0; s < aggr_map->nr; s++) {
- if (prefix && metric_only)
- fprintf(output, "%s", prefix);
- id = aggr_map->map[s];
- first = true;
- evlist__for_each_entry(evsel_list, counter) {
- val = ena = run = 0;
- nr = 0;
- for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
- s2 = aggr_get_id(perf_evsel__cpus(counter), cpu);
- if (s2 != id)
- continue;
- val += perf_counts(counter->counts, cpu, 0)->val;
- ena += perf_counts(counter->counts, cpu, 0)->ena;
- run += perf_counts(counter->counts, cpu, 0)->run;
- nr++;
- }
- if (first && metric_only) {
- first = false;
- aggr_printout(counter, id, nr);
- }
- if (prefix && !metric_only)
- fprintf(output, "%s", prefix);
- uval = val * counter->scale;
- printout(id, nr, counter, uval, prefix, run, ena, 1.0);
- if (!metric_only)
- fputc('\n', output);
- }
- if (metric_only)
- fputc('\n', output);
- }
- }
- static void print_aggr_thread(struct perf_evsel *counter, char *prefix)
- {
- FILE *output = stat_config.output;
- int nthreads = thread_map__nr(counter->threads);
- int ncpus = cpu_map__nr(counter->cpus);
- int cpu, thread;
- double uval;
- for (thread = 0; thread < nthreads; thread++) {
- u64 ena = 0, run = 0, val = 0;
- for (cpu = 0; cpu < ncpus; cpu++) {
- val += perf_counts(counter->counts, cpu, thread)->val;
- ena += perf_counts(counter->counts, cpu, thread)->ena;
- run += perf_counts(counter->counts, cpu, thread)->run;
- }
- if (prefix)
- fprintf(output, "%s", prefix);
- uval = val * counter->scale;
- printout(thread, 0, counter, uval, prefix, run, ena, 1.0);
- fputc('\n', output);
- }
- }
- /*
- * Print out the results of a single counter:
- * aggregated counts in system-wide mode
- */
- static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
- {
- FILE *output = stat_config.output;
- struct perf_stat_evsel *ps = counter->priv;
- double avg = avg_stats(&ps->res_stats[0]);
- double uval;
- double avg_enabled, avg_running;
- avg_enabled = avg_stats(&ps->res_stats[1]);
- avg_running = avg_stats(&ps->res_stats[2]);
- if (prefix && !metric_only)
- fprintf(output, "%s", prefix);
- uval = avg * counter->scale;
- printout(-1, 0, counter, uval, prefix, avg_running, avg_enabled, avg);
- if (!metric_only)
- fprintf(output, "\n");
- }
- /*
- * Print out the results of a single counter:
- * does not use aggregated count in system-wide
- */
- static void print_counter(struct perf_evsel *counter, char *prefix)
- {
- FILE *output = stat_config.output;
- u64 ena, run, val;
- double uval;
- int cpu;
- for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
- val = perf_counts(counter->counts, cpu, 0)->val;
- ena = perf_counts(counter->counts, cpu, 0)->ena;
- run = perf_counts(counter->counts, cpu, 0)->run;
- if (prefix)
- fprintf(output, "%s", prefix);
- uval = val * counter->scale;
- printout(cpu, 0, counter, uval, prefix, run, ena, 1.0);
- fputc('\n', output);
- }
- }
- static void print_no_aggr_metric(char *prefix)
- {
- int cpu;
- int nrcpus = 0;
- struct perf_evsel *counter;
- u64 ena, run, val;
- double uval;
- nrcpus = evsel_list->cpus->nr;
- for (cpu = 0; cpu < nrcpus; cpu++) {
- bool first = true;
- if (prefix)
- fputs(prefix, stat_config.output);
- evlist__for_each_entry(evsel_list, counter) {
- if (first) {
- aggr_printout(counter, cpu, 0);
- first = false;
- }
- val = perf_counts(counter->counts, cpu, 0)->val;
- ena = perf_counts(counter->counts, cpu, 0)->ena;
- run = perf_counts(counter->counts, cpu, 0)->run;
- uval = val * counter->scale;
- printout(cpu, 0, counter, uval, prefix, run, ena, 1.0);
- }
- fputc('\n', stat_config.output);
- }
- }
- static int aggr_header_lens[] = {
- [AGGR_CORE] = 18,
- [AGGR_SOCKET] = 12,
- [AGGR_NONE] = 6,
- [AGGR_THREAD] = 24,
- [AGGR_GLOBAL] = 0,
- };
- static const char *aggr_header_csv[] = {
- [AGGR_CORE] = "core,cpus,",
- [AGGR_SOCKET] = "socket,cpus",
- [AGGR_NONE] = "cpu,",
- [AGGR_THREAD] = "comm-pid,",
- [AGGR_GLOBAL] = ""
- };
- static void print_metric_headers(const char *prefix, bool no_indent)
- {
- struct perf_stat_output_ctx out;
- struct perf_evsel *counter;
- struct outstate os = {
- .fh = stat_config.output
- };
- if (prefix)
- fprintf(stat_config.output, "%s", prefix);
- if (!csv_output && !no_indent)
- fprintf(stat_config.output, "%*s",
- aggr_header_lens[stat_config.aggr_mode], "");
- if (csv_output) {
- if (stat_config.interval)
- fputs("time,", stat_config.output);
- fputs(aggr_header_csv[stat_config.aggr_mode],
- stat_config.output);
- }
- /* Print metrics headers only */
- evlist__for_each_entry(evsel_list, counter) {
- os.evsel = counter;
- out.ctx = &os;
- out.print_metric = print_metric_header;
- out.new_line = new_line_metric;
- os.evsel = counter;
- perf_stat__print_shadow_stats(counter, 0,
- 0,
- &out);
- }
- fputc('\n', stat_config.output);
- }
- static void print_interval(char *prefix, struct timespec *ts)
- {
- FILE *output = stat_config.output;
- static int num_print_interval;
- sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, csv_sep);
- if (num_print_interval == 0 && !csv_output) {
- switch (stat_config.aggr_mode) {
- case AGGR_SOCKET:
- fprintf(output, "# time socket cpus");
- if (!metric_only)
- fprintf(output, " counts %*s events\n", unit_width, "unit");
- break;
- case AGGR_CORE:
- fprintf(output, "# time core cpus");
- if (!metric_only)
- fprintf(output, " counts %*s events\n", unit_width, "unit");
- break;
- case AGGR_NONE:
- fprintf(output, "# time CPU");
- if (!metric_only)
- fprintf(output, " counts %*s events\n", unit_width, "unit");
- break;
- case AGGR_THREAD:
- fprintf(output, "# time comm-pid");
- if (!metric_only)
- fprintf(output, " counts %*s events\n", unit_width, "unit");
- break;
- case AGGR_GLOBAL:
- default:
- fprintf(output, "# time");
- if (!metric_only)
- fprintf(output, " counts %*s events\n", unit_width, "unit");
- case AGGR_UNSET:
- break;
- }
- }
- if (num_print_interval == 0 && metric_only)
- print_metric_headers(" ", true);
- if (++num_print_interval == 25)
- num_print_interval = 0;
- }
- static void print_header(int argc, const char **argv)
- {
- FILE *output = stat_config.output;
- int i;
- fflush(stdout);
- if (!csv_output) {
- fprintf(output, "\n");
- fprintf(output, " Performance counter stats for ");
- if (target.system_wide)
- fprintf(output, "\'system wide");
- else if (target.cpu_list)
- fprintf(output, "\'CPU(s) %s", target.cpu_list);
- else if (!target__has_task(&target)) {
- fprintf(output, "\'%s", argv ? argv[0] : "pipe");
- for (i = 1; argv && (i < argc); i++)
- fprintf(output, " %s", argv[i]);
- } else if (target.pid)
- fprintf(output, "process id \'%s", target.pid);
- else
- fprintf(output, "thread id \'%s", target.tid);
- fprintf(output, "\'");
- if (run_count > 1)
- fprintf(output, " (%d runs)", run_count);
- fprintf(output, ":\n\n");
- }
- }
- static void print_footer(void)
- {
- FILE *output = stat_config.output;
- if (!null_run)
- fprintf(output, "\n");
- fprintf(output, " %17.9f seconds time elapsed",
- avg_stats(&walltime_nsecs_stats) / NSEC_PER_SEC);
- if (run_count > 1) {
- fprintf(output, " ");
- print_noise_pct(stddev_stats(&walltime_nsecs_stats),
- avg_stats(&walltime_nsecs_stats));
- }
- fprintf(output, "\n\n");
- }
- static void print_counters(struct timespec *ts, int argc, const char **argv)
- {
- int interval = stat_config.interval;
- struct perf_evsel *counter;
- char buf[64], *prefix = NULL;
- /* Do not print anything if we record to the pipe. */
- if (STAT_RECORD && perf_stat.file.is_pipe)
- return;
- if (interval)
- print_interval(prefix = buf, ts);
- else
- print_header(argc, argv);
- if (metric_only) {
- static int num_print_iv;
- if (num_print_iv == 0 && !interval)
- print_metric_headers(prefix, false);
- if (num_print_iv++ == 25)
- num_print_iv = 0;
- if (stat_config.aggr_mode == AGGR_GLOBAL && prefix)
- fprintf(stat_config.output, "%s", prefix);
- }
- switch (stat_config.aggr_mode) {
- case AGGR_CORE:
- case AGGR_SOCKET:
- print_aggr(prefix);
- break;
- case AGGR_THREAD:
- evlist__for_each_entry(evsel_list, counter)
- print_aggr_thread(counter, prefix);
- break;
- case AGGR_GLOBAL:
- evlist__for_each_entry(evsel_list, counter)
- print_counter_aggr(counter, prefix);
- if (metric_only)
- fputc('\n', stat_config.output);
- break;
- case AGGR_NONE:
- if (metric_only)
- print_no_aggr_metric(prefix);
- else {
- evlist__for_each_entry(evsel_list, counter)
- print_counter(counter, prefix);
- }
- break;
- case AGGR_UNSET:
- default:
- break;
- }
- if (!interval && !csv_output)
- print_footer();
- fflush(stat_config.output);
- }
- static volatile int signr = -1;
- static void skip_signal(int signo)
- {
- if ((child_pid == -1) || stat_config.interval)
- done = 1;
- signr = signo;
- /*
- * render child_pid harmless
- * won't send SIGTERM to a random
- * process in case of race condition
- * and fast PID recycling
- */
- child_pid = -1;
- }
- static void sig_atexit(void)
- {
- sigset_t set, oset;
- /*
- * avoid race condition with SIGCHLD handler
- * in skip_signal() which is modifying child_pid
- * goal is to avoid send SIGTERM to a random
- * process
- */
- sigemptyset(&set);
- sigaddset(&set, SIGCHLD);
- sigprocmask(SIG_BLOCK, &set, &oset);
- if (child_pid != -1)
- kill(child_pid, SIGTERM);
- sigprocmask(SIG_SETMASK, &oset, NULL);
- if (signr == -1)
- return;
- signal(signr, SIG_DFL);
- kill(getpid(), signr);
- }
- static int stat__set_big_num(const struct option *opt __maybe_unused,
- const char *s __maybe_unused, int unset)
- {
- big_num_opt = unset ? 0 : 1;
- return 0;
- }
- static int enable_metric_only(const struct option *opt __maybe_unused,
- const char *s __maybe_unused, int unset)
- {
- force_metric_only = true;
- metric_only = !unset;
- return 0;
- }
- static const 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", &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('c', "scale", &stat_config.scale, "scale/normalize counters"),
- OPT_INCR('v', "verbose", &verbose,
- "be more verbose (show counter open errors, etc)"),
- OPT_INTEGER('r', "repeat", &run_count,
- "repeat command and print average + stddev (max: 100, forever: 0)"),
- OPT_BOOLEAN('n', "null", &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_STRING('x', "field-separator", &csv_sep, "separator",
- "print counts with custom separator"),
- OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
- "monitor event in cgroup name only", parse_cgroups),
- OPT_STRING('o', "output", &output_name, "file", "output file name"),
- OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
- OPT_INTEGER(0, "log-fd", &output_fd,
- "log output to fd, instead of stderr"),
- OPT_STRING(0, "pre", &pre_cmd, "command",
- "command to run prior to the measured command"),
- OPT_STRING(0, "post", &post_cmd, "command",
- "command to run after to the measured command"),
- OPT_UINTEGER('I', "interval-print", &stat_config.interval,
- "print counts at regular interval in ms (>= 10)"),
- OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
- "aggregate counts per processor socket", AGGR_SOCKET),
- OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
- "aggregate counts per physical processor core", AGGR_CORE),
- OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
- "aggregate counts per thread", AGGR_THREAD),
- OPT_UINTEGER('D', "delay", &initial_delay,
- "ms to wait before starting measurement after program start"),
- OPT_CALLBACK_NOOPT(0, "metric-only", &metric_only, NULL,
- "Only print computed metrics. No raw values", enable_metric_only),
- OPT_BOOLEAN(0, "topdown", &topdown_run,
- "measure topdown level 1 statistics"),
- OPT_END()
- };
- static int perf_stat__get_socket(struct cpu_map *map, int cpu)
- {
- return cpu_map__get_socket(map, cpu, NULL);
- }
- static int perf_stat__get_core(struct cpu_map *map, int cpu)
- {
- return cpu_map__get_core(map, cpu, NULL);
- }
- static int cpu_map__get_max(struct cpu_map *map)
- {
- int i, max = -1;
- for (i = 0; i < map->nr; i++) {
- if (map->map[i] > max)
- max = map->map[i];
- }
- return max;
- }
- static struct cpu_map *cpus_aggr_map;
- static int perf_stat__get_aggr(aggr_get_id_t get_id, struct cpu_map *map, int idx)
- {
- int cpu;
- if (idx >= map->nr)
- return -1;
- cpu = map->map[idx];
- if (cpus_aggr_map->map[cpu] == -1)
- cpus_aggr_map->map[cpu] = get_id(map, idx);
- return cpus_aggr_map->map[cpu];
- }
- static int perf_stat__get_socket_cached(struct cpu_map *map, int idx)
- {
- return perf_stat__get_aggr(perf_stat__get_socket, map, idx);
- }
- static int perf_stat__get_core_cached(struct cpu_map *map, int idx)
- {
- return perf_stat__get_aggr(perf_stat__get_core, map, idx);
- }
- 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->cpus, &aggr_map)) {
- perror("cannot build socket map");
- return -1;
- }
- aggr_get_id = perf_stat__get_socket_cached;
- break;
- case AGGR_CORE:
- if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
- perror("cannot build core map");
- return -1;
- }
- aggr_get_id = perf_stat__get_core_cached;
- break;
- case AGGR_NONE:
- case AGGR_GLOBAL:
- case AGGR_THREAD:
- case AGGR_UNSET:
- default:
- break;
- }
- /*
- * The evsel_list->cpus is the base we operate on,
- * taking the highest cpu number to be the size of
- * the aggregation translate cpumap.
- */
- nr = cpu_map__get_max(evsel_list->cpus);
- cpus_aggr_map = cpu_map__empty_new(nr + 1);
- return cpus_aggr_map ? 0 : -ENOMEM;
- }
- static void perf_stat__exit_aggr_mode(void)
- {
- cpu_map__put(aggr_map);
- cpu_map__put(cpus_aggr_map);
- aggr_map = NULL;
- cpus_aggr_map = NULL;
- }
- static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
- {
- int cpu;
- if (idx > map->nr)
- return -1;
- cpu = map->map[idx];
- if (cpu >= env->nr_cpus_online)
- return -1;
- return cpu;
- }
- static int perf_env__get_socket(struct 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_core(struct 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) {
- int socket_id = env->cpu[cpu].socket_id;
- /*
- * Encode socket in upper 16 bits
- * core_id is relative to socket, and
- * we need a global id. So we combine
- * socket + core id.
- */
- core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff);
- }
- return core;
- }
- static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
- struct cpu_map **sockp)
- {
- return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
- }
- static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
- struct cpu_map **corep)
- {
- return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
- }
- static int perf_stat__get_socket_file(struct cpu_map *map, int idx)
- {
- return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
- }
- static int perf_stat__get_core_file(struct cpu_map *map, int idx)
- {
- return perf_env__get_core(map, idx, &perf_stat.session->header.env);
- }
- static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
- {
- struct perf_env *env = &st->session->header.env;
- switch (stat_config.aggr_mode) {
- case AGGR_SOCKET:
- if (perf_env__build_socket_map(env, evsel_list->cpus, &aggr_map)) {
- perror("cannot build socket map");
- return -1;
- }
- aggr_get_id = perf_stat__get_socket_file;
- break;
- case AGGR_CORE:
- if (perf_env__build_core_map(env, evsel_list->cpus, &aggr_map)) {
- perror("cannot build core map");
- return -1;
- }
- aggr_get_id = perf_stat__get_core_file;
- break;
- case AGGR_NONE:
- case AGGR_GLOBAL:
- case AGGR_THREAD:
- case AGGR_UNSET:
- default:
- break;
- }
- return 0;
- }
- static int topdown_filter_events(const char **attr, char **str, bool use_group)
- {
- int off = 0;
- int i;
- int len = 0;
- char *s;
- for (i = 0; attr[i]; i++) {
- if (pmu_have_event("cpu", attr[i])) {
- len += strlen(attr[i]) + 1;
- attr[i - off] = attr[i];
- } else
- off++;
- }
- attr[i - off] = NULL;
- *str = malloc(len + 1 + 2);
- if (!*str)
- return -1;
- s = *str;
- if (i - off == 0) {
- *s = 0;
- return 0;
- }
- if (use_group)
- *s++ = '{';
- for (i = 0; attr[i]; i++) {
- strcpy(s, attr[i]);
- s += strlen(s);
- *s++ = ',';
- }
- if (use_group) {
- s[-1] = '}';
- *s = 0;
- } else
- s[-1] = 0;
- return 0;
- }
- __weak bool arch_topdown_check_group(bool *warn)
- {
- *warn = false;
- return false;
- }
- __weak void arch_topdown_group_warn(void)
- {
- }
- /*
- * Add default attributes, if there were no attributes specified or
- * if -d/--detailed, -d -d or -d -d -d is used:
- */
- static int add_default_attributes(void)
- {
- int err;
- struct perf_event_attr default_attrs0[] = {
- { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
- { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
- { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
- { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
- };
- struct perf_event_attr frontend_attrs[] = {
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
- };
- struct perf_event_attr backend_attrs[] = {
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
- };
- struct perf_event_attr default_attrs1[] = {
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
- };
- /*
- * Detailed stats (-d), covering the L1 and last level data caches:
- */
- struct perf_event_attr detailed_attrs[] = {
- { .type = PERF_TYPE_HW_CACHE,
- .config =
- PERF_COUNT_HW_CACHE_L1D << 0 |
- (PERF_COUNT_HW_CACHE_OP_READ << 8) |
- (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
- { .type = PERF_TYPE_HW_CACHE,
- .config =
- PERF_COUNT_HW_CACHE_L1D << 0 |
- (PERF_COUNT_HW_CACHE_OP_READ << 8) |
- (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
- { .type = PERF_TYPE_HW_CACHE,
- .config =
- PERF_COUNT_HW_CACHE_LL << 0 |
- (PERF_COUNT_HW_CACHE_OP_READ << 8) |
- (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
- { .type = PERF_TYPE_HW_CACHE,
- .config =
- PERF_COUNT_HW_CACHE_LL << 0 |
- (PERF_COUNT_HW_CACHE_OP_READ << 8) |
- (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
- };
- /*
- * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
- */
- struct perf_event_attr very_detailed_attrs[] = {
- { .type = PERF_TYPE_HW_CACHE,
- .config =
- PERF_COUNT_HW_CACHE_L1I << 0 |
- (PERF_COUNT_HW_CACHE_OP_READ << 8) |
- (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
- { .type = PERF_TYPE_HW_CACHE,
- .config =
- PERF_COUNT_HW_CACHE_L1I << 0 |
- (PERF_COUNT_HW_CACHE_OP_READ << 8) |
- (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
- { .type = PERF_TYPE_HW_CACHE,
- .config =
- PERF_COUNT_HW_CACHE_DTLB << 0 |
- (PERF_COUNT_HW_CACHE_OP_READ << 8) |
- (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
- { .type = PERF_TYPE_HW_CACHE,
- .config =
- PERF_COUNT_HW_CACHE_DTLB << 0 |
- (PERF_COUNT_HW_CACHE_OP_READ << 8) |
- (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
- { .type = PERF_TYPE_HW_CACHE,
- .config =
- PERF_COUNT_HW_CACHE_ITLB << 0 |
- (PERF_COUNT_HW_CACHE_OP_READ << 8) |
- (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
- { .type = PERF_TYPE_HW_CACHE,
- .config =
- PERF_COUNT_HW_CACHE_ITLB << 0 |
- (PERF_COUNT_HW_CACHE_OP_READ << 8) |
- (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
- };
- /*
- * Very, very detailed stats (-d -d -d), adding prefetch events:
- */
- struct perf_event_attr very_very_detailed_attrs[] = {
- { .type = PERF_TYPE_HW_CACHE,
- .config =
- PERF_COUNT_HW_CACHE_L1D << 0 |
- (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
- (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
- { .type = PERF_TYPE_HW_CACHE,
- .config =
- PERF_COUNT_HW_CACHE_L1D << 0 |
- (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
- (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
- };
- /* Set attrs if no event is selected and !null_run: */
- if (null_run)
- return 0;
- if (transaction_run) {
- if (pmu_have_event("cpu", "cycles-ct") &&
- pmu_have_event("cpu", "el-start"))
- err = parse_events(evsel_list, transaction_attrs, NULL);
- else
- err = parse_events(evsel_list, transaction_limited_attrs, NULL);
- if (err) {
- fprintf(stderr, "Cannot set up transaction events\n");
- return -1;
- }
- return 0;
- }
- if (topdown_run) {
- char *str = NULL;
- bool warn = false;
- if (stat_config.aggr_mode != AGGR_GLOBAL &&
- stat_config.aggr_mode != AGGR_CORE) {
- pr_err("top down event configuration requires --per-core mode\n");
- return -1;
- }
- stat_config.aggr_mode = AGGR_CORE;
- if (nr_cgroups || !target__has_cpu(&target)) {
- pr_err("top down event configuration requires system-wide mode (-a)\n");
- return -1;
- }
- if (!force_metric_only)
- metric_only = true;
- if (topdown_filter_events(topdown_attrs, &str,
- arch_topdown_check_group(&warn)) < 0) {
- pr_err("Out of memory\n");
- return -1;
- }
- if (topdown_attrs[0] && str) {
- if (warn)
- arch_topdown_group_warn();
- err = parse_events(evsel_list, str, NULL);
- if (err) {
- fprintf(stderr,
- "Cannot set up top down events %s: %d\n",
- str, err);
- free(str);
- return -1;
- }
- } else {
- fprintf(stderr, "System does not support topdown\n");
- return -1;
- }
- free(str);
- }
- if (!evsel_list->nr_entries) {
- if (target__has_cpu(&target))
- default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
- if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
- return -1;
- if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
- if (perf_evlist__add_default_attrs(evsel_list,
- frontend_attrs) < 0)
- return -1;
- }
- if (pmu_have_event("cpu", "stalled-cycles-backend")) {
- if (perf_evlist__add_default_attrs(evsel_list,
- backend_attrs) < 0)
- return -1;
- }
- if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
- return -1;
- }
- /* Detailed events get appended to the event list: */
- if (detailed_run < 1)
- return 0;
- /* Append detailed run extra attributes: */
- if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
- return -1;
- if (detailed_run < 2)
- return 0;
- /* Append very detailed run extra attributes: */
- if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
- return -1;
- if (detailed_run < 3)
- return 0;
- /* Append very, very detailed run extra attributes: */
- return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
- }
- static const char * const stat_record_usage[] = {
- "perf stat record [<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_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_file *file = &perf_stat.file;
- argc = parse_options(argc, argv, stat_options, stat_record_usage,
- PARSE_OPT_STOP_AT_NON_OPTION);
- if (output_name)
- file->path = output_name;
- if (run_count != 1 || forever) {
- pr_err("Cannot use -r option with perf stat record.\n");
- return -1;
- }
- session = perf_session__new(file, false, NULL);
- if (session == NULL) {
- pr_err("Perf session creation failed.\n");
- return -1;
- }
- init_features(session);
- session->evlist = evsel_list;
- perf_stat.session = session;
- perf_stat.record = true;
- return argc;
- }
- static int process_stat_round_event(struct perf_tool *tool __maybe_unused,
- union perf_event *event,
- struct perf_session *session)
- {
- struct stat_round_event *stat_round = &event->stat_round;
- struct perf_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_tool *tool __maybe_unused,
- union perf_event *event,
- struct perf_session *session __maybe_unused)
- {
- struct perf_stat *st = container_of(tool, struct perf_stat, tool);
- perf_event__read_stat_config(&stat_config, &event->stat_config);
- if (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.file.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, 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_tool *tool __maybe_unused,
- union perf_event *event,
- struct perf_session *session __maybe_unused)
- {
- 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_tool *tool __maybe_unused,
- union perf_event *event,
- struct perf_session *session __maybe_unused)
- {
- struct perf_stat *st = container_of(tool, struct perf_stat, tool);
- struct 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-core", &perf_stat.aggr_mode,
- "aggregate counts per physical processor core", AGGR_CORE),
- OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
- "disable CPU count aggregation", AGGR_NONE),
- OPT_END()
- };
- struct stat st;
- int ret;
- argc = parse_options(argc, argv, options, stat_report_usage, 0);
- if (!input_name || !strlen(input_name)) {
- if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
- input_name = "-";
- else
- input_name = "perf.data";
- }
- perf_stat.file.path = input_name;
- perf_stat.file.mode = PERF_DATA_MODE_READ;
- session = perf_session__new(&perf_stat.file, false, &perf_stat.tool);
- if (session == NULL)
- return -1;
- perf_stat.session = session;
- stat_config.output = stderr;
- evsel_list = session->evlist;
- ret = perf_session__process_events(session);
- if (ret)
- return ret;
- perf_session__delete(session);
- return 0;
- }
- int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
- {
- const char * const stat_usage[] = {
- "perf stat [<options>] [<command>]",
- NULL
- };
- int status = -EINVAL, run_idx;
- const char *mode;
- FILE *output = stderr;
- unsigned int interval;
- const char * const stat_subcommands[] = { "record", "report" };
- setlocale(LC_ALL, "");
- evsel_list = perf_evlist__new();
- if (evsel_list == NULL)
- return -ENOMEM;
- parse_events__shrink_config_terms();
- argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
- (const char **) stat_usage,
- PARSE_OPT_STOP_AT_NON_OPTION);
- perf_stat__init_shadow_stats();
- if (csv_sep) {
- csv_output = true;
- if (!strcmp(csv_sep, "\\t"))
- csv_sep = "\t";
- } else
- 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;
- /*
- * 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 (metric_only && stat_config.aggr_mode == AGGR_THREAD) {
- fprintf(stderr, "--metric-only is not supported with --per-thread\n");
- goto out;
- }
- if (metric_only && run_count > 1) {
- fprintf(stderr, "--metric-only is not supported with -r\n");
- 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 (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 */
- big_num = false;
- } else if (big_num_opt == 0) /* User passed --no-big-num */
- big_num = false;
- if (!argc && target__none(&target))
- usage_with_options(stat_usage, stat_options);
- if (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 (run_count == 0) {
- forever = true;
- run_count = 1;
- }
- if ((stat_config.aggr_mode == AGGR_THREAD) && !target__has_task(&target)) {
- fprintf(stderr, "The --per-thread option is only available "
- "when monitoring via -p -t options.\n");
- parse_options_usage(NULL, stat_options, "p", 1);
- parse_options_usage(NULL, stat_options, "t", 1);
- goto out;
- }
- /*
- * no_aggr, cgroup are for system-wide only
- * --per-thread is aggregated per thread, we dont mix it with cpu mode
- */
- if (((stat_config.aggr_mode != AGGR_GLOBAL &&
- stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
- !target__has_cpu(&target)) {
- fprintf(stderr, "both cgroup and no-aggregation "
- "modes only available in system-wide mode\n");
- parse_options_usage(stat_usage, stat_options, "G", 1);
- parse_options_usage(NULL, stat_options, "A", 1);
- parse_options_usage(NULL, stat_options, "a", 1);
- goto out;
- }
- if (add_default_attributes())
- goto out;
- target__validate(&target);
- if (perf_evlist__create_maps(evsel_list, &target) < 0) {
- if (target__has_task(&target)) {
- pr_err("Problems finding threads of monitor\n");
- parse_options_usage(stat_usage, stat_options, "p", 1);
- parse_options_usage(NULL, stat_options, "t", 1);
- } else if (target__has_cpu(&target)) {
- perror("failed to parse CPUs map");
- parse_options_usage(stat_usage, stat_options, "C", 1);
- parse_options_usage(NULL, stat_options, "a", 1);
- }
- goto out;
- }
- /*
- * Initialize thread_map with comm names,
- * so we could print it out on output.
- */
- if (stat_config.aggr_mode == AGGR_THREAD)
- thread_map__read_comms(evsel_list->threads);
- if (interval && interval < 100) {
- if (interval < 10) {
- pr_err("print interval must be >= 10ms\n");
- parse_options_usage(stat_usage, stat_options, "I", 1);
- goto out;
- } else
- pr_warning("print interval < 100ms. "
- "The overhead percentage could be high in some cases. "
- "Please proceed with caution.\n");
- }
- if (perf_evlist__alloc_stats(evsel_list, interval))
- goto out;
- if (perf_stat_init_aggr_mode())
- goto out;
- /*
- * We dont want to block the signals - that would cause
- * child tasks to inherit that and Ctrl-C would not work.
- * What we want is for Ctrl-C to work in the exec()-ed
- * task, but being ignored by perf stat itself:
- */
- atexit(sig_atexit);
- if (!forever)
- signal(SIGINT, skip_signal);
- signal(SIGCHLD, skip_signal);
- signal(SIGALRM, skip_signal);
- signal(SIGABRT, skip_signal);
- status = 0;
- for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
- if (run_count != 1 && verbose)
- fprintf(output, "[ perf stat: executing run #%d ... ]\n",
- run_idx + 1);
- status = run_perf_stat(argc, argv);
- if (forever && status != -1) {
- print_counters(NULL, argc, argv);
- perf_stat__reset_stats();
- }
- }
- if (!forever && status != -1 && !interval)
- print_counters(NULL, argc, argv);
- if (STAT_RECORD) {
- /*
- * We synthesize the kernel mmap record just so that older tools
- * don't emit warnings about not being able to resolve symbols
- * due to /proc/sys/kernel/kptr_restrict settings and instear provide
- * a saner message about no samples being in the perf.data file.
- *
- * This also serves to suppress a warning about f_header.data.size == 0
- * in header.c at the moment 'perf stat record' gets introduced, which
- * is not really needed once we start adding the stat specific PERF_RECORD_
- * records, but the need to suppress the kptr_restrict messages in older
- * tools remain -acme
- */
- int fd = perf_data_file__fd(&perf_stat.file);
- 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.file.is_pipe) {
- perf_stat.session->header.data_size += perf_stat.bytes_written;
- perf_session__write_header(perf_stat.session, evsel_list, fd, true);
- }
- perf_session__delete(perf_stat.session);
- }
- perf_stat__exit_aggr_mode();
- perf_evlist__free_stats(evsel_list);
- out:
- perf_evlist__delete(evsel_list);
- return status;
- }
|