![Jiri Olsa](/assets/img/avatar_default.png)
So they can be used in perf stat record command in following patch. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-2-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1433 lines
36 KiB
C
1433 lines
36 KiB
C
/*
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* builtin-stat.c
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*
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* Builtin stat command: Give a precise performance counters summary
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* overview about any workload, CPU or specific PID.
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*
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* Sample output:
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$ perf stat ./hackbench 10
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Time: 0.118
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Performance counter stats for './hackbench 10':
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1708.761321 task-clock # 11.037 CPUs utilized
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41,190 context-switches # 0.024 M/sec
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6,735 CPU-migrations # 0.004 M/sec
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17,318 page-faults # 0.010 M/sec
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5,205,202,243 cycles # 3.046 GHz
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3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle
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1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle
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2,603,501,247 instructions # 0.50 insns per cycle
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# 1.48 stalled cycles per insn
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484,357,498 branches # 283.455 M/sec
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6,388,934 branch-misses # 1.32% of all branches
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0.154822978 seconds time elapsed
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*
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* Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
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*
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* Improvements and fixes by:
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*
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* Arjan van de Ven <arjan@linux.intel.com>
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* Yanmin Zhang <yanmin.zhang@intel.com>
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* Wu Fengguang <fengguang.wu@intel.com>
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* Mike Galbraith <efault@gmx.de>
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* Paul Mackerras <paulus@samba.org>
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* Jaswinder Singh Rajput <jaswinder@kernel.org>
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include "perf.h"
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#include "builtin.h"
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#include "util/cgroup.h"
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#include "util/util.h"
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#include "util/parse-options.h"
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#include "util/parse-events.h"
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#include "util/pmu.h"
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#include "util/event.h"
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#include "util/evlist.h"
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#include "util/evsel.h"
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#include "util/debug.h"
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#include "util/color.h"
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#include "util/stat.h"
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#include "util/header.h"
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#include "util/cpumap.h"
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#include "util/thread.h"
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#include "util/thread_map.h"
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#include "util/counts.h"
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#include <stdlib.h>
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#include <sys/prctl.h>
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#include <locale.h>
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#define DEFAULT_SEPARATOR " "
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#define CNTR_NOT_SUPPORTED "<not supported>"
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#define CNTR_NOT_COUNTED "<not counted>"
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static void print_counters(struct timespec *ts, int argc, const char **argv);
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/* Default events used for perf stat -T */
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static const char *transaction_attrs = {
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"task-clock,"
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"{"
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"instructions,"
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"cycles,"
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"cpu/cycles-t/,"
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"cpu/tx-start/,"
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"cpu/el-start/,"
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"cpu/cycles-ct/"
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"}"
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};
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/* More limited version when the CPU does not have all events. */
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static const char * transaction_limited_attrs = {
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"task-clock,"
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"{"
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"instructions,"
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"cycles,"
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"cpu/cycles-t/,"
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"cpu/tx-start/"
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"}"
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};
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static struct perf_evlist *evsel_list;
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static struct target target = {
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.uid = UINT_MAX,
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};
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typedef int (*aggr_get_id_t)(struct cpu_map *m, int cpu);
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static int run_count = 1;
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static bool no_inherit = false;
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static volatile pid_t child_pid = -1;
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static bool null_run = false;
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static int detailed_run = 0;
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static bool transaction_run;
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static bool big_num = true;
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static int big_num_opt = -1;
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static const char *csv_sep = NULL;
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static bool csv_output = false;
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static bool group = false;
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static const char *pre_cmd = NULL;
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static const char *post_cmd = NULL;
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static bool sync_run = false;
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static unsigned int initial_delay = 0;
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static unsigned int unit_width = 4; /* strlen("unit") */
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static bool forever = false;
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static struct timespec ref_time;
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static struct cpu_map *aggr_map;
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static aggr_get_id_t aggr_get_id;
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static bool append_file;
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static const char *output_name;
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static int output_fd;
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static volatile int done = 0;
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static struct perf_stat_config stat_config = {
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.aggr_mode = AGGR_GLOBAL,
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.scale = true,
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};
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static inline void diff_timespec(struct timespec *r, struct timespec *a,
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struct timespec *b)
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{
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r->tv_sec = a->tv_sec - b->tv_sec;
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if (a->tv_nsec < b->tv_nsec) {
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r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
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r->tv_sec--;
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} else {
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r->tv_nsec = a->tv_nsec - b->tv_nsec ;
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}
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}
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static void perf_stat__reset_stats(void)
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{
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perf_evlist__reset_stats(evsel_list);
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perf_stat__reset_shadow_stats();
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}
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static int create_perf_stat_counter(struct perf_evsel *evsel)
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{
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struct perf_event_attr *attr = &evsel->attr;
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if (stat_config.scale)
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attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
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PERF_FORMAT_TOTAL_TIME_RUNNING;
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attr->inherit = !no_inherit;
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if (target__has_cpu(&target))
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return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
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if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) {
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attr->disabled = 1;
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if (!initial_delay)
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attr->enable_on_exec = 1;
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}
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return perf_evsel__open_per_thread(evsel, evsel_list->threads);
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}
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/*
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* Does the counter have nsecs as a unit?
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*/
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static inline int nsec_counter(struct perf_evsel *evsel)
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{
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if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
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perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
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return 1;
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return 0;
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}
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/*
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* Read out the results of a single counter:
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* do not aggregate counts across CPUs in system-wide mode
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*/
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static int read_counter(struct perf_evsel *counter)
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{
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int nthreads = thread_map__nr(evsel_list->threads);
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int ncpus = perf_evsel__nr_cpus(counter);
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int cpu, thread;
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if (!counter->supported)
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return -ENOENT;
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if (counter->system_wide)
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nthreads = 1;
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for (thread = 0; thread < nthreads; thread++) {
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for (cpu = 0; cpu < ncpus; cpu++) {
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struct perf_counts_values *count;
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count = perf_counts(counter->counts, cpu, thread);
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if (perf_evsel__read(counter, cpu, thread, count))
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return -1;
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}
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}
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return 0;
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}
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static void read_counters(bool close_counters)
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{
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struct perf_evsel *counter;
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evlist__for_each(evsel_list, counter) {
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if (read_counter(counter))
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pr_debug("failed to read counter %s\n", counter->name);
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if (perf_stat_process_counter(&stat_config, counter))
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pr_warning("failed to process counter %s\n", counter->name);
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if (close_counters) {
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perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
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thread_map__nr(evsel_list->threads));
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}
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}
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}
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static void process_interval(void)
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{
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struct timespec ts, rs;
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read_counters(false);
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clock_gettime(CLOCK_MONOTONIC, &ts);
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diff_timespec(&rs, &ts, &ref_time);
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print_counters(&rs, 0, NULL);
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}
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static void handle_initial_delay(void)
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{
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struct perf_evsel *counter;
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if (initial_delay) {
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const int ncpus = cpu_map__nr(evsel_list->cpus),
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nthreads = thread_map__nr(evsel_list->threads);
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usleep(initial_delay * 1000);
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evlist__for_each(evsel_list, counter)
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perf_evsel__enable(counter, ncpus, nthreads);
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}
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}
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static volatile int workload_exec_errno;
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/*
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* perf_evlist__prepare_workload will send a SIGUSR1
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* if the fork fails, since we asked by setting its
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* want_signal to true.
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*/
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static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
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void *ucontext __maybe_unused)
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{
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workload_exec_errno = info->si_value.sival_int;
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}
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static int __run_perf_stat(int argc, const char **argv)
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{
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int interval = stat_config.interval;
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char msg[512];
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unsigned long long t0, t1;
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struct perf_evsel *counter;
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struct timespec ts;
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size_t l;
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int status = 0;
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const bool forks = (argc > 0);
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if (interval) {
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ts.tv_sec = interval / 1000;
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ts.tv_nsec = (interval % 1000) * 1000000;
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} else {
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ts.tv_sec = 1;
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ts.tv_nsec = 0;
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}
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if (forks) {
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if (perf_evlist__prepare_workload(evsel_list, &target, argv, false,
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workload_exec_failed_signal) < 0) {
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perror("failed to prepare workload");
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return -1;
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}
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child_pid = evsel_list->workload.pid;
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}
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if (group)
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perf_evlist__set_leader(evsel_list);
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evlist__for_each(evsel_list, counter) {
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if (create_perf_stat_counter(counter) < 0) {
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/*
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* PPC returns ENXIO for HW counters until 2.6.37
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* (behavior changed with commit b0a873e).
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*/
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if (errno == EINVAL || errno == ENOSYS ||
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errno == ENOENT || errno == EOPNOTSUPP ||
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errno == ENXIO) {
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if (verbose)
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ui__warning("%s event is not supported by the kernel.\n",
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perf_evsel__name(counter));
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counter->supported = false;
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if ((counter->leader != counter) ||
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!(counter->leader->nr_members > 1))
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continue;
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}
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perf_evsel__open_strerror(counter, &target,
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errno, msg, sizeof(msg));
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ui__error("%s\n", msg);
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if (child_pid != -1)
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kill(child_pid, SIGTERM);
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return -1;
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}
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counter->supported = true;
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l = strlen(counter->unit);
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if (l > unit_width)
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unit_width = l;
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}
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if (perf_evlist__apply_filters(evsel_list, &counter)) {
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error("failed to set filter \"%s\" on event %s with %d (%s)\n",
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counter->filter, perf_evsel__name(counter), errno,
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strerror_r(errno, msg, sizeof(msg)));
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return -1;
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}
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/*
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* Enable counters and exec the command:
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*/
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t0 = rdclock();
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clock_gettime(CLOCK_MONOTONIC, &ref_time);
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if (forks) {
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perf_evlist__start_workload(evsel_list);
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handle_initial_delay();
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if (interval) {
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while (!waitpid(child_pid, &status, WNOHANG)) {
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nanosleep(&ts, NULL);
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process_interval();
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}
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}
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wait(&status);
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if (workload_exec_errno) {
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const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
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pr_err("Workload failed: %s\n", emsg);
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return -1;
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}
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if (WIFSIGNALED(status))
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psignal(WTERMSIG(status), argv[0]);
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} else {
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handle_initial_delay();
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while (!done) {
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nanosleep(&ts, NULL);
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if (interval)
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process_interval();
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}
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}
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t1 = rdclock();
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update_stats(&walltime_nsecs_stats, t1 - t0);
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read_counters(true);
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return WEXITSTATUS(status);
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}
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static int run_perf_stat(int argc, const char **argv)
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{
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int ret;
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if (pre_cmd) {
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ret = system(pre_cmd);
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if (ret)
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return ret;
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}
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if (sync_run)
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sync();
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ret = __run_perf_stat(argc, argv);
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if (ret)
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return ret;
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if (post_cmd) {
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ret = system(post_cmd);
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if (ret)
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return ret;
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}
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return ret;
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}
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static void print_running(u64 run, u64 ena)
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{
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if (csv_output) {
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fprintf(stat_config.output, "%s%" PRIu64 "%s%.2f",
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csv_sep,
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run,
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csv_sep,
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ena ? 100.0 * run / ena : 100.0);
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} else if (run != ena) {
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fprintf(stat_config.output, " (%.2f%%)", 100.0 * run / ena);
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}
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}
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static void print_noise_pct(double total, double avg)
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{
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double pct = rel_stddev_stats(total, avg);
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if (csv_output)
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fprintf(stat_config.output, "%s%.2f%%", csv_sep, pct);
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else if (pct)
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fprintf(stat_config.output, " ( +-%6.2f%% )", pct);
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}
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static void print_noise(struct perf_evsel *evsel, double avg)
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{
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struct perf_stat_evsel *ps;
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if (run_count == 1)
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return;
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ps = evsel->priv;
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print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
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}
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static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
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{
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switch (stat_config.aggr_mode) {
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case AGGR_CORE:
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fprintf(stat_config.output, "S%d-C%*d%s%*d%s",
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cpu_map__id_to_socket(id),
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csv_output ? 0 : -8,
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cpu_map__id_to_cpu(id),
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csv_sep,
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csv_output ? 0 : 4,
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nr,
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csv_sep);
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break;
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case AGGR_SOCKET:
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fprintf(stat_config.output, "S%*d%s%*d%s",
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csv_output ? 0 : -5,
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id,
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csv_sep,
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csv_output ? 0 : 4,
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nr,
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csv_sep);
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break;
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case AGGR_NONE:
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fprintf(stat_config.output, "CPU%*d%s",
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csv_output ? 0 : -4,
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perf_evsel__cpus(evsel)->map[id], csv_sep);
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break;
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case AGGR_THREAD:
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fprintf(stat_config.output, "%*s-%*d%s",
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csv_output ? 0 : 16,
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thread_map__comm(evsel->threads, id),
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csv_output ? 0 : -8,
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thread_map__pid(evsel->threads, id),
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csv_sep);
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break;
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case AGGR_GLOBAL:
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case AGGR_UNSET:
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default:
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break;
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}
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}
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static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
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{
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FILE *output = stat_config.output;
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double msecs = avg / 1e6;
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const char *fmt_v, *fmt_n;
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char name[25];
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fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
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fmt_n = csv_output ? "%s" : "%-25s";
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aggr_printout(evsel, id, nr);
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scnprintf(name, sizeof(name), "%s%s",
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perf_evsel__name(evsel), csv_output ? "" : " (msec)");
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fprintf(output, fmt_v, msecs, csv_sep);
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if (csv_output)
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fprintf(output, "%s%s", evsel->unit, csv_sep);
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else
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fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
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fprintf(output, fmt_n, name);
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if (evsel->cgrp)
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fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
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}
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static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
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{
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FILE *output = stat_config.output;
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double sc = evsel->scale;
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const char *fmt;
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if (csv_output) {
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fmt = sc != 1.0 ? "%.2f%s" : "%.0f%s";
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} else {
|
|
if (big_num)
|
|
fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
|
|
else
|
|
fmt = sc != 1.0 ? "%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)
|
|
{
|
|
int cpu = cpu_map__id_to_cpu(id);
|
|
|
|
if (stat_config.aggr_mode == AGGR_GLOBAL)
|
|
cpu = 0;
|
|
|
|
if (nsec_counter(counter))
|
|
nsec_printout(id, nr, counter, uval);
|
|
else
|
|
abs_printout(id, nr, counter, uval);
|
|
|
|
if (!csv_output && !stat_config.interval)
|
|
perf_stat__print_shadow_stats(stat_config.output, counter,
|
|
uval, cpu,
|
|
stat_config.aggr_mode);
|
|
}
|
|
|
|
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;
|
|
|
|
if (!(aggr_map || aggr_get_id))
|
|
return;
|
|
|
|
for (s = 0; s < aggr_map->nr; s++) {
|
|
id = aggr_map->map[s];
|
|
evlist__for_each(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 (prefix)
|
|
fprintf(output, "%s", prefix);
|
|
|
|
if (run == 0 || ena == 0) {
|
|
aggr_printout(counter, id, nr);
|
|
|
|
fprintf(output, "%*s%s",
|
|
csv_output ? 0 : 18,
|
|
counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
|
|
csv_sep);
|
|
|
|
fprintf(output, "%-*s%s",
|
|
csv_output ? 0 : unit_width,
|
|
counter->unit, csv_sep);
|
|
|
|
fprintf(output, "%*s",
|
|
csv_output ? 0 : -25,
|
|
perf_evsel__name(counter));
|
|
|
|
if (counter->cgrp)
|
|
fprintf(output, "%s%s",
|
|
csv_sep, counter->cgrp->name);
|
|
|
|
print_running(run, ena);
|
|
fputc('\n', output);
|
|
continue;
|
|
}
|
|
uval = val * counter->scale;
|
|
printout(id, nr, counter, uval);
|
|
if (!csv_output)
|
|
print_noise(counter, 1.0);
|
|
|
|
print_running(run, ena);
|
|
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);
|
|
|
|
if (!csv_output)
|
|
print_noise(counter, 1.0);
|
|
|
|
print_running(run, ena);
|
|
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]);
|
|
int scaled = counter->counts->scaled;
|
|
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)
|
|
fprintf(output, "%s", prefix);
|
|
|
|
if (scaled == -1 || !counter->supported) {
|
|
fprintf(output, "%*s%s",
|
|
csv_output ? 0 : 18,
|
|
counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
|
|
csv_sep);
|
|
fprintf(output, "%-*s%s",
|
|
csv_output ? 0 : unit_width,
|
|
counter->unit, csv_sep);
|
|
fprintf(output, "%*s",
|
|
csv_output ? 0 : -25,
|
|
perf_evsel__name(counter));
|
|
|
|
if (counter->cgrp)
|
|
fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
|
|
|
|
print_running(avg_running, avg_enabled);
|
|
fputc('\n', output);
|
|
return;
|
|
}
|
|
|
|
uval = avg * counter->scale;
|
|
printout(-1, 0, counter, uval);
|
|
|
|
print_noise(counter, avg);
|
|
|
|
print_running(avg_running, avg_enabled);
|
|
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);
|
|
|
|
if (run == 0 || ena == 0) {
|
|
fprintf(output, "CPU%*d%s%*s%s",
|
|
csv_output ? 0 : -4,
|
|
perf_evsel__cpus(counter)->map[cpu], csv_sep,
|
|
csv_output ? 0 : 18,
|
|
counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
|
|
csv_sep);
|
|
|
|
fprintf(output, "%-*s%s",
|
|
csv_output ? 0 : unit_width,
|
|
counter->unit, csv_sep);
|
|
|
|
fprintf(output, "%*s",
|
|
csv_output ? 0 : -25,
|
|
perf_evsel__name(counter));
|
|
|
|
if (counter->cgrp)
|
|
fprintf(output, "%s%s",
|
|
csv_sep, counter->cgrp->name);
|
|
|
|
print_running(run, ena);
|
|
fputc('\n', output);
|
|
continue;
|
|
}
|
|
|
|
uval = val * counter->scale;
|
|
printout(cpu, 0, counter, uval);
|
|
if (!csv_output)
|
|
print_noise(counter, 1.0);
|
|
print_running(run, ena);
|
|
|
|
fputc('\n', 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 counts %*s events\n", unit_width, "unit");
|
|
break;
|
|
case AGGR_CORE:
|
|
fprintf(output, "# time core cpus counts %*s events\n", unit_width, "unit");
|
|
break;
|
|
case AGGR_NONE:
|
|
fprintf(output, "# time CPU counts %*s events\n", unit_width, "unit");
|
|
break;
|
|
case AGGR_THREAD:
|
|
fprintf(output, "# time comm-pid counts %*s events\n", unit_width, "unit");
|
|
break;
|
|
case AGGR_GLOBAL:
|
|
default:
|
|
fprintf(output, "# time counts %*s events\n", unit_width, "unit");
|
|
case AGGR_UNSET:
|
|
break;
|
|
}
|
|
}
|
|
|
|
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[0]);
|
|
for (i = 1; 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)/1e9);
|
|
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;
|
|
|
|
if (interval)
|
|
print_interval(prefix = buf, ts);
|
|
else
|
|
print_header(argc, argv);
|
|
|
|
switch (stat_config.aggr_mode) {
|
|
case AGGR_CORE:
|
|
case AGGR_SOCKET:
|
|
print_aggr(prefix);
|
|
break;
|
|
case AGGR_THREAD:
|
|
evlist__for_each(evsel_list, counter)
|
|
print_aggr_thread(counter, prefix);
|
|
break;
|
|
case AGGR_GLOBAL:
|
|
evlist__for_each(evsel_list, counter)
|
|
print_counter_aggr(counter, prefix);
|
|
break;
|
|
case AGGR_NONE:
|
|
evlist__for_each(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 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_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;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
struct perf_event_attr default_attrs[] = {
|
|
|
|
{ .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 },
|
|
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
|
|
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
|
|
{ .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) {
|
|
int err;
|
|
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 (!evsel_list->nr_entries) {
|
|
if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 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);
|
|
}
|
|
|
|
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;
|
|
|
|
setlocale(LC_ALL, "");
|
|
|
|
evsel_list = perf_evlist__new();
|
|
if (evsel_list == NULL)
|
|
return -ENOMEM;
|
|
|
|
argc = parse_options(argc, argv, stat_options, stat_usage,
|
|
PARSE_OPT_STOP_AT_NON_OPTION);
|
|
|
|
interval = stat_config.interval;
|
|
|
|
if (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 (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;
|
|
|
|
if (csv_sep) {
|
|
csv_output = true;
|
|
if (!strcmp(csv_sep, "\\t"))
|
|
csv_sep = "\t";
|
|
} else
|
|
csv_sep = DEFAULT_SEPARATOR;
|
|
|
|
/*
|
|
* 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);
|
|
|
|
perf_evlist__free_stats(evsel_list);
|
|
out:
|
|
perf_evlist__delete(evsel_list);
|
|
return status;
|
|
}
|