1/*
   2 * builtin-stat.c
   3 *
   4 * Builtin stat command: Give a precise performance counters summary
   5 * overview about any workload, CPU or specific PID.
   6 *
   7 * Sample output:
   8
   9   $ perf stat ./hackbench 10
  10
  11  Time: 0.118
  12
  13  Performance counter stats for './hackbench 10':
  14
  15       1708.761321 task-clock                #   11.037 CPUs utilized
  16            41,190 context-switches          #    0.024 M/sec
  17             6,735 CPU-migrations            #    0.004 M/sec
  18            17,318 page-faults               #    0.010 M/sec
  19     5,205,202,243 cycles                    #    3.046 GHz
  20     3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
  21     1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
  22     2,603,501,247 instructions              #    0.50  insns per cycle
  23                                             #    1.48  stalled cycles per insn
  24       484,357,498 branches                  #  283.455 M/sec
  25         6,388,934 branch-misses             #    1.32% of all branches
  26
  27        0.154822978  seconds time elapsed
  28
  29 *
  30 * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
  31 *
  32 * Improvements and fixes by:
  33 *
  34 *   Arjan van de Ven <arjan@linux.intel.com>
  35 *   Yanmin Zhang <yanmin.zhang@intel.com>
  36 *   Wu Fengguang <fengguang.wu@intel.com>
  37 *   Mike Galbraith <efault@gmx.de>
  38 *   Paul Mackerras <paulus@samba.org>
  39 *   Jaswinder Singh Rajput <jaswinder@kernel.org>
  40 *
  41 * Released under the GPL v2. (and only v2, not any later version)
  42 */
  43
  44#include "perf.h"
  45#include "builtin.h"
  46#include "util/cgroup.h"
  47#include "util/util.h"
  48#include <subcmd/parse-options.h>
  49#include "util/parse-events.h"
  50#include "util/pmu.h"
  51#include "util/event.h"
  52#include "util/evlist.h"
  53#include "util/evsel.h"
  54#include "util/debug.h"
  55#include "util/drv_configs.h"
  56#include "util/color.h"
  57#include "util/stat.h"
  58#include "util/header.h"
  59#include "util/cpumap.h"
  60#include "util/thread.h"
  61#include "util/thread_map.h"
  62#include "util/counts.h"
  63#include "util/group.h"
  64#include "util/session.h"
  65#include "util/tool.h"
  66#include "util/group.h"
  67#include "asm/bug.h"
  68
  69#include <linux/time64.h>
  70#include <api/fs/fs.h>
  71#include <stdlib.h>
  72#include <sys/prctl.h>
  73#include <locale.h>
  74#include <math.h>
  75
  76#define DEFAULT_SEPARATOR	" "
  77#define CNTR_NOT_SUPPORTED	"<not supported>"
  78#define CNTR_NOT_COUNTED	"<not counted>"
  79
  80static void print_counters(struct timespec *ts, int argc, const char **argv);
  81
  82/* Default events used for perf stat -T */
  83static const char *transaction_attrs = {
  84	"task-clock,"
  85	"{"
  86	"instructions,"
  87	"cycles,"
  88	"cpu/cycles-t/,"
  89	"cpu/tx-start/,"
  90	"cpu/el-start/,"
  91	"cpu/cycles-ct/"
  92	"}"
  93};
  94
  95/* More limited version when the CPU does not have all events. */
  96static const char * transaction_limited_attrs = {
  97	"task-clock,"
  98	"{"
  99	"instructions,"
 100	"cycles,"
 101	"cpu/cycles-t/,"
 102	"cpu/tx-start/"
 103	"}"
 104};
 105
 106static const char * topdown_attrs[] = {
 107	"topdown-total-slots",
 108	"topdown-slots-retired",
 109	"topdown-recovery-bubbles",
 110	"topdown-fetch-bubbles",
 111	"topdown-slots-issued",
 112	NULL,
 113};
 114
 115static struct perf_evlist	*evsel_list;
 116
 117static struct target target = {
 118	.uid	= UINT_MAX,
 119};
 120
 121typedef int (*aggr_get_id_t)(struct cpu_map *m, int cpu);
 122
 123static int			run_count			=  1;
 124static bool			no_inherit			= false;
 125static volatile pid_t		child_pid			= -1;
 126static bool			null_run			=  false;
 127static int			detailed_run			=  0;
 128static bool			transaction_run;
 129static bool			topdown_run			= false;
 130static bool			big_num				=  true;
 131static int			big_num_opt			=  -1;
 132static const char		*csv_sep			= NULL;
 133static bool			csv_output			= false;
 134static bool			group				= false;
 135static const char		*pre_cmd			= NULL;
 136static const char		*post_cmd			= NULL;
 137static bool			sync_run			= false;
 138static unsigned int		initial_delay			= 0;
 139static unsigned int		unit_width			= 4; /* strlen("unit") */
 140static bool			forever				= false;
 141static bool			metric_only			= false;
 142static bool			force_metric_only		= false;
 143static struct timespec		ref_time;
 144static struct cpu_map		*aggr_map;
 145static aggr_get_id_t		aggr_get_id;
 146static bool			append_file;
 147static const char		*output_name;
 148static int			output_fd;
 149
 150struct perf_stat {
 151	bool			 record;
 152	struct perf_data_file	 file;
 153	struct perf_session	*session;
 154	u64			 bytes_written;
 155	struct perf_tool	 tool;
 156	bool			 maps_allocated;
 157	struct cpu_map		*cpus;
 158	struct thread_map	*threads;
 159	enum aggr_mode		 aggr_mode;
 160};
 161
 162static struct perf_stat		perf_stat;
 163#define STAT_RECORD		perf_stat.record
 164
 165static volatile int done = 0;
 166
 167static struct perf_stat_config stat_config = {
 168	.aggr_mode	= AGGR_GLOBAL,
 169	.scale		= true,
 170};
 171
 172static inline void diff_timespec(struct timespec *r, struct timespec *a,
 173				 struct timespec *b)
 174{
 175	r->tv_sec = a->tv_sec - b->tv_sec;
 176	if (a->tv_nsec < b->tv_nsec) {
 177		r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
 178		r->tv_sec--;
 179	} else {
 180		r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 181	}
 182}
 183
 184static void perf_stat__reset_stats(void)
 185{
 186	perf_evlist__reset_stats(evsel_list);
 187	perf_stat__reset_shadow_stats();
 188}
 189
 190static int create_perf_stat_counter(struct perf_evsel *evsel)
 191{
 192	struct perf_event_attr *attr = &evsel->attr;
 193
 194	if (stat_config.scale)
 195		attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 196				    PERF_FORMAT_TOTAL_TIME_RUNNING;
 197
 198	attr->inherit = !no_inherit;
 199
 200	/*
 201	 * Some events get initialized with sample_(period/type) set,
 202	 * like tracepoints. Clear it up for counting.
 203	 */
 204	attr->sample_period = 0;
 205
 206	/*
 207	 * But set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
 208	 * while avoiding that older tools show confusing messages.
 209	 *
 210	 * However for pipe sessions we need to keep it zero,
 211	 * because script's perf_evsel__check_attr is triggered
 212	 * by attr->sample_type != 0, and we can't run it on
 213	 * stat sessions.
 214	 */
 215	if (!(STAT_RECORD && perf_stat.file.is_pipe))
 216		attr->sample_type = PERF_SAMPLE_IDENTIFIER;
 217
 218	/*
 219	 * Disabling all counters initially, they will be enabled
 220	 * either manually by us or by kernel via enable_on_exec
 221	 * set later.
 222	 */
 223	if (perf_evsel__is_group_leader(evsel)) {
 224		attr->disabled = 1;
 225
 226		/*
 227		 * In case of initial_delay we enable tracee
 228		 * events manually.
 229		 */
 230		if (target__none(&target) && !initial_delay)
 231			attr->enable_on_exec = 1;
 232	}
 233
 234	if (target__has_cpu(&target))
 235		return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
 236
 237	return perf_evsel__open_per_thread(evsel, evsel_list->threads);
 238}
 239
 240/*
 241 * Does the counter have nsecs as a unit?
 242 */
 243static inline int nsec_counter(struct perf_evsel *evsel)
 244{
 245	if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 246	    perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 247		return 1;
 248
 249	return 0;
 250}
 251
 252static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
 253				     union perf_event *event,
 254				     struct perf_sample *sample __maybe_unused,
 255				     struct machine *machine __maybe_unused)
 256{
 257	if (perf_data_file__write(&perf_stat.file, event, event->header.size) < 0) {
 258		pr_err("failed to write perf data, error: %m\n");
 259		return -1;
 260	}
 261
 262	perf_stat.bytes_written += event->header.size;
 263	return 0;
 264}
 265
 266static int write_stat_round_event(u64 tm, u64 type)
 267{
 268	return perf_event__synthesize_stat_round(NULL, tm, type,
 269						 process_synthesized_event,
 270						 NULL);
 271}
 272
 273#define WRITE_STAT_ROUND_EVENT(time, interval) \
 274	write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
 275
 276#define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
 277
 278static int
 279perf_evsel__write_stat_event(struct perf_evsel *counter, u32 cpu, u32 thread,
 280			     struct perf_counts_values *count)
 281{
 282	struct perf_sample_id *sid = SID(counter, cpu, thread);
 283
 284	return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
 285					   process_synthesized_event, NULL);
 286}
 287
 288/*
 289 * Read out the results of a single counter:
 290 * do not aggregate counts across CPUs in system-wide mode
 291 */
 292static int read_counter(struct perf_evsel *counter)
 293{
 294	int nthreads = thread_map__nr(evsel_list->threads);
 295	int ncpus, cpu, thread;
 296
 297	if (target__has_cpu(&target))
 298		ncpus = perf_evsel__nr_cpus(counter);
 299	else
 300		ncpus = 1;
 301
 302	if (!counter->supported)
 303		return -ENOENT;
 304
 305	if (counter->system_wide)
 306		nthreads = 1;
 307
 308	for (thread = 0; thread < nthreads; thread++) {
 309		for (cpu = 0; cpu < ncpus; cpu++) {
 310			struct perf_counts_values *count;
 311
 312			count = perf_counts(counter->counts, cpu, thread);
 313			if (perf_evsel__read(counter, cpu, thread, count))
 314				return -1;
 315
 316			if (STAT_RECORD) {
 317				if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
 318					pr_err("failed to write stat event\n");
 319					return -1;
 320				}
 321			}
 322
 323			if (verbose > 1) {
 324				fprintf(stat_config.output,
 325					"%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 326						perf_evsel__name(counter),
 327						cpu,
 328						count->val, count->ena, count->run);
 329			}
 330		}
 331	}
 332
 333	return 0;
 334}
 335
 336static void read_counters(void)
 337{
 338	struct perf_evsel *counter;
 339
 340	evlist__for_each_entry(evsel_list, counter) {
 341		if (read_counter(counter))
 342			pr_debug("failed to read counter %s\n", counter->name);
 343
 344		if (perf_stat_process_counter(&stat_config, counter))
 345			pr_warning("failed to process counter %s\n", counter->name);
 
 
 
 
 
 346	}
 347}
 348
 349static void process_interval(void)
 350{
 351	struct timespec ts, rs;
 352
 353	read_counters();
 354
 355	clock_gettime(CLOCK_MONOTONIC, &ts);
 356	diff_timespec(&rs, &ts, &ref_time);
 357
 358	if (STAT_RECORD) {
 359		if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
 360			pr_err("failed to write stat round event\n");
 361	}
 362
 363	print_counters(&rs, 0, NULL);
 364}
 365
 366static void enable_counters(void)
 367{
 368	if (initial_delay)
 369		usleep(initial_delay * USEC_PER_MSEC);
 370
 371	/*
 372	 * We need to enable counters only if:
 373	 * - we don't have tracee (attaching to task or cpu)
 374	 * - we have initial delay configured
 375	 */
 376	if (!target__none(&target) || initial_delay)
 377		perf_evlist__enable(evsel_list);
 378}
 379
 380static void disable_counters(void)
 381{
 382	/*
 383	 * If we don't have tracee (attaching to task or cpu), counters may
 384	 * still be running. To get accurate group ratios, we must stop groups
 385	 * from counting before reading their constituent counters.
 386	 */
 387	if (!target__none(&target))
 388		perf_evlist__disable(evsel_list);
 389}
 390
 391static volatile int workload_exec_errno;
 392
 393/*
 394 * perf_evlist__prepare_workload will send a SIGUSR1
 395 * if the fork fails, since we asked by setting its
 396 * want_signal to true.
 397 */
 398static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 399					void *ucontext __maybe_unused)
 400{
 401	workload_exec_errno = info->si_value.sival_int;
 402}
 403
 404static bool has_unit(struct perf_evsel *counter)
 405{
 406	return counter->unit && *counter->unit;
 407}
 408
 409static bool has_scale(struct perf_evsel *counter)
 410{
 411	return counter->scale != 1;
 412}
 413
 414static int perf_stat_synthesize_config(bool is_pipe)
 415{
 416	struct perf_evsel *counter;
 417	int err;
 418
 419	if (is_pipe) {
 420		err = perf_event__synthesize_attrs(NULL, perf_stat.session,
 421						   process_synthesized_event);
 422		if (err < 0) {
 423			pr_err("Couldn't synthesize attrs.\n");
 424			return err;
 425		}
 426	}
 427
 428	/*
 429	 * Synthesize other events stuff not carried within
 430	 * attr event - unit, scale, name
 431	 */
 432	evlist__for_each_entry(evsel_list, counter) {
 433		if (!counter->supported)
 434			continue;
 435
 436		/*
 437		 * Synthesize unit and scale only if it's defined.
 438		 */
 439		if (has_unit(counter)) {
 440			err = perf_event__synthesize_event_update_unit(NULL, counter, process_synthesized_event);
 441			if (err < 0) {
 442				pr_err("Couldn't synthesize evsel unit.\n");
 443				return err;
 444			}
 445		}
 446
 447		if (has_scale(counter)) {
 448			err = perf_event__synthesize_event_update_scale(NULL, counter, process_synthesized_event);
 449			if (err < 0) {
 450				pr_err("Couldn't synthesize evsel scale.\n");
 451				return err;
 452			}
 453		}
 454
 455		if (counter->own_cpus) {
 456			err = perf_event__synthesize_event_update_cpus(NULL, counter, process_synthesized_event);
 457			if (err < 0) {
 458				pr_err("Couldn't synthesize evsel scale.\n");
 459				return err;
 460			}
 461		}
 462
 463		/*
 464		 * Name is needed only for pipe output,
 465		 * perf.data carries event names.
 466		 */
 467		if (is_pipe) {
 468			err = perf_event__synthesize_event_update_name(NULL, counter, process_synthesized_event);
 469			if (err < 0) {
 470				pr_err("Couldn't synthesize evsel name.\n");
 471				return err;
 472			}
 473		}
 474	}
 475
 476	err = perf_event__synthesize_thread_map2(NULL, evsel_list->threads,
 477						process_synthesized_event,
 478						NULL);
 479	if (err < 0) {
 480		pr_err("Couldn't synthesize thread map.\n");
 481		return err;
 482	}
 483
 484	err = perf_event__synthesize_cpu_map(NULL, evsel_list->cpus,
 485					     process_synthesized_event, NULL);
 486	if (err < 0) {
 487		pr_err("Couldn't synthesize thread map.\n");
 488		return err;
 489	}
 490
 491	err = perf_event__synthesize_stat_config(NULL, &stat_config,
 492						 process_synthesized_event, NULL);
 493	if (err < 0) {
 494		pr_err("Couldn't synthesize config.\n");
 495		return err;
 496	}
 497
 498	return 0;
 499}
 500
 501#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
 502
 503static int __store_counter_ids(struct perf_evsel *counter,
 504			       struct cpu_map *cpus,
 505			       struct thread_map *threads)
 506{
 507	int cpu, thread;
 508
 509	for (cpu = 0; cpu < cpus->nr; cpu++) {
 510		for (thread = 0; thread < threads->nr; thread++) {
 511			int fd = FD(counter, cpu, thread);
 512
 513			if (perf_evlist__id_add_fd(evsel_list, counter,
 514						   cpu, thread, fd) < 0)
 515				return -1;
 516		}
 517	}
 518
 519	return 0;
 520}
 521
 522static int store_counter_ids(struct perf_evsel *counter)
 523{
 524	struct cpu_map *cpus = counter->cpus;
 525	struct thread_map *threads = counter->threads;
 526
 527	if (perf_evsel__alloc_id(counter, cpus->nr, threads->nr))
 528		return -ENOMEM;
 529
 530	return __store_counter_ids(counter, cpus, threads);
 531}
 532
 533static int __run_perf_stat(int argc, const char **argv)
 534{
 535	int interval = stat_config.interval;
 536	char msg[512];
 537	unsigned long long t0, t1;
 538	struct perf_evsel *counter;
 539	struct timespec ts;
 540	size_t l;
 541	int status = 0;
 542	const bool forks = (argc > 0);
 543	bool is_pipe = STAT_RECORD ? perf_stat.file.is_pipe : false;
 544	struct perf_evsel_config_term *err_term;
 545
 546	if (interval) {
 547		ts.tv_sec  = interval / USEC_PER_MSEC;
 548		ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
 549	} else {
 550		ts.tv_sec  = 1;
 551		ts.tv_nsec = 0;
 552	}
 553
 554	if (forks) {
 555		if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
 556						  workload_exec_failed_signal) < 0) {
 557			perror("failed to prepare workload");
 558			return -1;
 559		}
 560		child_pid = evsel_list->workload.pid;
 561	}
 562
 563	if (group)
 564		perf_evlist__set_leader(evsel_list);
 565
 566	evlist__for_each_entry(evsel_list, counter) {
 567try_again:
 568		if (create_perf_stat_counter(counter) < 0) {
 569			/*
 570			 * PPC returns ENXIO for HW counters until 2.6.37
 571			 * (behavior changed with commit b0a873e).
 572			 */
 573			if (errno == EINVAL || errno == ENOSYS ||
 574			    errno == ENOENT || errno == EOPNOTSUPP ||
 575			    errno == ENXIO) {
 576				if (verbose)
 577					ui__warning("%s event is not supported by the kernel.\n",
 578						    perf_evsel__name(counter));
 579				counter->supported = false;
 580
 581				if ((counter->leader != counter) ||
 582				    !(counter->leader->nr_members > 1))
 583					continue;
 584			} else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 585                                if (verbose)
 586                                        ui__warning("%s\n", msg);
 587                                goto try_again;
 588                        }
 589
 590			perf_evsel__open_strerror(counter, &target,
 591						  errno, msg, sizeof(msg));
 592			ui__error("%s\n", msg);
 593
 594			if (child_pid != -1)
 595				kill(child_pid, SIGTERM);
 596
 597			return -1;
 598		}
 599		counter->supported = true;
 600
 601		l = strlen(counter->unit);
 602		if (l > unit_width)
 603			unit_width = l;
 604
 605		if (STAT_RECORD && store_counter_ids(counter))
 606			return -1;
 607	}
 608
 609	if (perf_evlist__apply_filters(evsel_list, &counter)) {
 610		error("failed to set filter \"%s\" on event %s with %d (%s)\n",
 611			counter->filter, perf_evsel__name(counter), errno,
 612			str_error_r(errno, msg, sizeof(msg)));
 613		return -1;
 614	}
 615
 616	if (perf_evlist__apply_drv_configs(evsel_list, &counter, &err_term)) {
 617		error("failed to set config \"%s\" on event %s with %d (%s)\n",
 618		      err_term->val.drv_cfg, perf_evsel__name(counter), errno,
 619		      str_error_r(errno, msg, sizeof(msg)));
 620		return -1;
 621	}
 622
 623	if (STAT_RECORD) {
 624		int err, fd = perf_data_file__fd(&perf_stat.file);
 625
 626		if (is_pipe) {
 627			err = perf_header__write_pipe(perf_data_file__fd(&perf_stat.file));
 628		} else {
 629			err = perf_session__write_header(perf_stat.session, evsel_list,
 630							 fd, false);
 631		}
 632
 633		if (err < 0)
 634			return err;
 635
 636		err = perf_stat_synthesize_config(is_pipe);
 637		if (err < 0)
 638			return err;
 639	}
 640
 641	/*
 642	 * Enable counters and exec the command:
 643	 */
 644	t0 = rdclock();
 645	clock_gettime(CLOCK_MONOTONIC, &ref_time);
 646
 647	if (forks) {
 648		perf_evlist__start_workload(evsel_list);
 649		enable_counters();
 650
 651		if (interval) {
 652			while (!waitpid(child_pid, &status, WNOHANG)) {
 653				nanosleep(&ts, NULL);
 654				process_interval();
 655			}
 656		}
 657		wait(&status);
 658
 659		if (workload_exec_errno) {
 660			const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
 661			pr_err("Workload failed: %s\n", emsg);
 662			return -1;
 663		}
 664
 665		if (WIFSIGNALED(status))
 666			psignal(WTERMSIG(status), argv[0]);
 667	} else {
 668		enable_counters();
 669		while (!done) {
 670			nanosleep(&ts, NULL);
 671			if (interval)
 672				process_interval();
 673		}
 674	}
 675
 676	disable_counters();
 677
 678	t1 = rdclock();
 679
 680	update_stats(&walltime_nsecs_stats, t1 - t0);
 681
 682	/*
 683	 * Closing a group leader splits the group, and as we only disable
 684	 * group leaders, results in remaining events becoming enabled. To
 685	 * avoid arbitrary skew, we must read all counters before closing any
 686	 * group leaders.
 687	 */
 688	read_counters();
 689	perf_evlist__close(evsel_list);
 690
 691	return WEXITSTATUS(status);
 692}
 693
 694static int run_perf_stat(int argc, const char **argv)
 695{
 696	int ret;
 697
 698	if (pre_cmd) {
 699		ret = system(pre_cmd);
 700		if (ret)
 701			return ret;
 702	}
 703
 704	if (sync_run)
 705		sync();
 706
 707	ret = __run_perf_stat(argc, argv);
 708	if (ret)
 709		return ret;
 710
 711	if (post_cmd) {
 712		ret = system(post_cmd);
 713		if (ret)
 714			return ret;
 715	}
 716
 717	return ret;
 718}
 719
 720static void print_running(u64 run, u64 ena)
 721{
 722	if (csv_output) {
 723		fprintf(stat_config.output, "%s%" PRIu64 "%s%.2f",
 724					csv_sep,
 725					run,
 726					csv_sep,
 727					ena ? 100.0 * run / ena : 100.0);
 728	} else if (run != ena) {
 729		fprintf(stat_config.output, "  (%.2f%%)", 100.0 * run / ena);
 730	}
 731}
 732
 733static void print_noise_pct(double total, double avg)
 734{
 735	double pct = rel_stddev_stats(total, avg);
 736
 737	if (csv_output)
 738		fprintf(stat_config.output, "%s%.2f%%", csv_sep, pct);
 739	else if (pct)
 740		fprintf(stat_config.output, "  ( +-%6.2f%% )", pct);
 741}
 742
 743static void print_noise(struct perf_evsel *evsel, double avg)
 744{
 745	struct perf_stat_evsel *ps;
 746
 747	if (run_count == 1)
 748		return;
 749
 750	ps = evsel->priv;
 751	print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 752}
 753
 754static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
 755{
 756	switch (stat_config.aggr_mode) {
 757	case AGGR_CORE:
 758		fprintf(stat_config.output, "S%d-C%*d%s%*d%s",
 759			cpu_map__id_to_socket(id),
 760			csv_output ? 0 : -8,
 761			cpu_map__id_to_cpu(id),
 762			csv_sep,
 763			csv_output ? 0 : 4,
 764			nr,
 765			csv_sep);
 766		break;
 767	case AGGR_SOCKET:
 768		fprintf(stat_config.output, "S%*d%s%*d%s",
 769			csv_output ? 0 : -5,
 770			id,
 771			csv_sep,
 772			csv_output ? 0 : 4,
 773			nr,
 774			csv_sep);
 775			break;
 776	case AGGR_NONE:
 777		fprintf(stat_config.output, "CPU%*d%s",
 778			csv_output ? 0 : -4,
 779			perf_evsel__cpus(evsel)->map[id], csv_sep);
 780		break;
 781	case AGGR_THREAD:
 782		fprintf(stat_config.output, "%*s-%*d%s",
 783			csv_output ? 0 : 16,
 784			thread_map__comm(evsel->threads, id),
 785			csv_output ? 0 : -8,
 786			thread_map__pid(evsel->threads, id),
 787			csv_sep);
 788		break;
 789	case AGGR_GLOBAL:
 790	case AGGR_UNSET:
 791	default:
 792		break;
 793	}
 794}
 795
 796struct outstate {
 797	FILE *fh;
 798	bool newline;
 799	const char *prefix;
 800	int  nfields;
 801	int  id, nr;
 802	struct perf_evsel *evsel;
 803};
 804
 805#define METRIC_LEN  35
 806
 807static void new_line_std(void *ctx)
 808{
 809	struct outstate *os = ctx;
 810
 811	os->newline = true;
 812}
 813
 814static void do_new_line_std(struct outstate *os)
 815{
 816	fputc('\n', os->fh);
 817	fputs(os->prefix, os->fh);
 818	aggr_printout(os->evsel, os->id, os->nr);
 819	if (stat_config.aggr_mode == AGGR_NONE)
 820		fprintf(os->fh, "        ");
 821	fprintf(os->fh, "                                                 ");
 822}
 823
 824static void print_metric_std(void *ctx, const char *color, const char *fmt,
 825			     const char *unit, double val)
 826{
 827	struct outstate *os = ctx;
 828	FILE *out = os->fh;
 829	int n;
 830	bool newline = os->newline;
 831
 832	os->newline = false;
 833
 834	if (unit == NULL || fmt == NULL) {
 835		fprintf(out, "%-*s", METRIC_LEN, "");
 836		return;
 837	}
 838
 839	if (newline)
 840		do_new_line_std(os);
 841
 842	n = fprintf(out, " # ");
 843	if (color)
 844		n += color_fprintf(out, color, fmt, val);
 845	else
 846		n += fprintf(out, fmt, val);
 847	fprintf(out, " %-*s", METRIC_LEN - n - 1, unit);
 848}
 849
 850static void new_line_csv(void *ctx)
 851{
 852	struct outstate *os = ctx;
 853	int i;
 854
 855	fputc('\n', os->fh);
 856	if (os->prefix)
 857		fprintf(os->fh, "%s%s", os->prefix, csv_sep);
 858	aggr_printout(os->evsel, os->id, os->nr);
 859	for (i = 0; i < os->nfields; i++)
 860		fputs(csv_sep, os->fh);
 861}
 862
 863static void print_metric_csv(void *ctx,
 864			     const char *color __maybe_unused,
 865			     const char *fmt, const char *unit, double val)
 866{
 867	struct outstate *os = ctx;
 868	FILE *out = os->fh;
 869	char buf[64], *vals, *ends;
 870
 871	if (unit == NULL || fmt == NULL) {
 872		fprintf(out, "%s%s%s%s", csv_sep, csv_sep, csv_sep, csv_sep);
 873		return;
 874	}
 875	snprintf(buf, sizeof(buf), fmt, val);
 876	vals = buf;
 877	while (isspace(*vals))
 878		vals++;
 879	ends = vals;
 880	while (isdigit(*ends) || *ends == '.')
 881		ends++;
 882	*ends = 0;
 883	while (isspace(*unit))
 884		unit++;
 885	fprintf(out, "%s%s%s%s", csv_sep, vals, csv_sep, unit);
 886}
 887
 888#define METRIC_ONLY_LEN 20
 889
 890/* Filter out some columns that don't work well in metrics only mode */
 891
 892static bool valid_only_metric(const char *unit)
 893{
 894	if (!unit)
 895		return false;
 896	if (strstr(unit, "/sec") ||
 897	    strstr(unit, "hz") ||
 898	    strstr(unit, "Hz") ||
 899	    strstr(unit, "CPUs utilized"))
 900		return false;
 901	return true;
 902}
 903
 904static const char *fixunit(char *buf, struct perf_evsel *evsel,
 905			   const char *unit)
 906{
 907	if (!strncmp(unit, "of all", 6)) {
 908		snprintf(buf, 1024, "%s %s", perf_evsel__name(evsel),
 909			 unit);
 910		return buf;
 911	}
 912	return unit;
 913}
 914
 915static void print_metric_only(void *ctx, const char *color, const char *fmt,
 916			      const char *unit, double val)
 917{
 918	struct outstate *os = ctx;
 919	FILE *out = os->fh;
 920	int n;
 921	char buf[1024];
 922	unsigned mlen = METRIC_ONLY_LEN;
 923
 924	if (!valid_only_metric(unit))
 925		return;
 926	unit = fixunit(buf, os->evsel, unit);
 927	if (color)
 928		n = color_fprintf(out, color, fmt, val);
 929	else
 930		n = fprintf(out, fmt, val);
 931	if (n > METRIC_ONLY_LEN)
 932		n = METRIC_ONLY_LEN;
 933	if (mlen < strlen(unit))
 934		mlen = strlen(unit) + 1;
 935	fprintf(out, "%*s", mlen - n, "");
 936}
 937
 938static void print_metric_only_csv(void *ctx, const char *color __maybe_unused,
 939				  const char *fmt,
 940				  const char *unit, double val)
 941{
 942	struct outstate *os = ctx;
 943	FILE *out = os->fh;
 944	char buf[64], *vals, *ends;
 945	char tbuf[1024];
 946
 947	if (!valid_only_metric(unit))
 948		return;
 949	unit = fixunit(tbuf, os->evsel, unit);
 950	snprintf(buf, sizeof buf, fmt, val);
 951	vals = buf;
 952	while (isspace(*vals))
 953		vals++;
 954	ends = vals;
 955	while (isdigit(*ends) || *ends == '.')
 956		ends++;
 957	*ends = 0;
 958	fprintf(out, "%s%s", vals, csv_sep);
 959}
 960
 961static void new_line_metric(void *ctx __maybe_unused)
 962{
 963}
 964
 965static void print_metric_header(void *ctx, const char *color __maybe_unused,
 966				const char *fmt __maybe_unused,
 967				const char *unit, double val __maybe_unused)
 968{
 969	struct outstate *os = ctx;
 970	char tbuf[1024];
 971
 972	if (!valid_only_metric(unit))
 973		return;
 974	unit = fixunit(tbuf, os->evsel, unit);
 975	if (csv_output)
 976		fprintf(os->fh, "%s%s", unit, csv_sep);
 977	else
 978		fprintf(os->fh, "%-*s ", METRIC_ONLY_LEN, unit);
 979}
 980
 981static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
 982{
 983	FILE *output = stat_config.output;
 984	double msecs = avg / NSEC_PER_MSEC;
 985	const char *fmt_v, *fmt_n;
 986	char name[25];
 987
 988	fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
 989	fmt_n = csv_output ? "%s" : "%-25s";
 990
 991	aggr_printout(evsel, id, nr);
 992
 993	scnprintf(name, sizeof(name), "%s%s",
 994		  perf_evsel__name(evsel), csv_output ? "" : " (msec)");
 995
 996	fprintf(output, fmt_v, msecs, csv_sep);
 997
 998	if (csv_output)
 999		fprintf(output, "%s%s", evsel->unit, csv_sep);
1000	else
1001		fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
1002
1003	fprintf(output, fmt_n, name);
1004
1005	if (evsel->cgrp)
1006		fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1007}
1008
1009static int first_shadow_cpu(struct perf_evsel *evsel, int id)
1010{
1011	int i;
1012
1013	if (!aggr_get_id)
1014		return 0;
1015
1016	if (stat_config.aggr_mode == AGGR_NONE)
1017		return id;
1018
1019	if (stat_config.aggr_mode == AGGR_GLOBAL)
1020		return 0;
1021
1022	for (i = 0; i < perf_evsel__nr_cpus(evsel); i++) {
1023		int cpu2 = perf_evsel__cpus(evsel)->map[i];
1024
1025		if (aggr_get_id(evsel_list->cpus, cpu2) == id)
1026			return cpu2;
1027	}
1028	return 0;
1029}
1030
1031static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
1032{
1033	FILE *output = stat_config.output;
1034	double sc =  evsel->scale;
1035	const char *fmt;
1036
1037	if (csv_output) {
1038		fmt = floor(sc) != sc ?  "%.2f%s" : "%.0f%s";
1039	} else {
1040		if (big_num)
1041			fmt = floor(sc) != sc ? "%'18.2f%s" : "%'18.0f%s";
1042		else
1043			fmt = floor(sc) != sc ? "%18.2f%s" : "%18.0f%s";
1044	}
1045
1046	aggr_printout(evsel, id, nr);
1047
1048	fprintf(output, fmt, avg, csv_sep);
1049
1050	if (evsel->unit)
1051		fprintf(output, "%-*s%s",
1052			csv_output ? 0 : unit_width,
1053			evsel->unit, csv_sep);
1054
1055	fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
1056
1057	if (evsel->cgrp)
1058		fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1059}
1060
1061static void printout(int id, int nr, struct perf_evsel *counter, double uval,
1062		     char *prefix, u64 run, u64 ena, double noise)
1063{
1064	struct perf_stat_output_ctx out;
1065	struct outstate os = {
1066		.fh = stat_config.output,
1067		.prefix = prefix ? prefix : "",
1068		.id = id,
1069		.nr = nr,
1070		.evsel = counter,
1071	};
1072	print_metric_t pm = print_metric_std;
1073	void (*nl)(void *);
1074
1075	if (metric_only) {
1076		nl = new_line_metric;
1077		if (csv_output)
1078			pm = print_metric_only_csv;
1079		else
1080			pm = print_metric_only;
1081	} else
1082		nl = new_line_std;
1083
1084	if (csv_output && !metric_only) {
1085		static int aggr_fields[] = {
1086			[AGGR_GLOBAL] = 0,
1087			[AGGR_THREAD] = 1,
1088			[AGGR_NONE] = 1,
1089			[AGGR_SOCKET] = 2,
1090			[AGGR_CORE] = 2,
1091		};
1092
1093		pm = print_metric_csv;
1094		nl = new_line_csv;
1095		os.nfields = 3;
1096		os.nfields += aggr_fields[stat_config.aggr_mode];
1097		if (counter->cgrp)
1098			os.nfields++;
1099	}
1100	if (run == 0 || ena == 0 || counter->counts->scaled == -1) {
1101		if (metric_only) {
1102			pm(&os, NULL, "", "", 0);
1103			return;
1104		}
1105		aggr_printout(counter, id, nr);
1106
1107		fprintf(stat_config.output, "%*s%s",
1108			csv_output ? 0 : 18,
1109			counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1110			csv_sep);
1111
1112		fprintf(stat_config.output, "%-*s%s",
1113			csv_output ? 0 : unit_width,
1114			counter->unit, csv_sep);
1115
1116		fprintf(stat_config.output, "%*s",
1117			csv_output ? 0 : -25,
1118			perf_evsel__name(counter));
1119
1120		if (counter->cgrp)
1121			fprintf(stat_config.output, "%s%s",
1122				csv_sep, counter->cgrp->name);
1123
1124		if (!csv_output)
1125			pm(&os, NULL, NULL, "", 0);
1126		print_noise(counter, noise);
1127		print_running(run, ena);
1128		if (csv_output)
1129			pm(&os, NULL, NULL, "", 0);
1130		return;
1131	}
1132
1133	if (metric_only)
1134		/* nothing */;
1135	else if (nsec_counter(counter))
1136		nsec_printout(id, nr, counter, uval);
1137	else
1138		abs_printout(id, nr, counter, uval);
1139
1140	out.print_metric = pm;
1141	out.new_line = nl;
1142	out.ctx = &os;
1143
1144	if (csv_output && !metric_only) {
1145		print_noise(counter, noise);
1146		print_running(run, ena);
1147	}
1148
1149	perf_stat__print_shadow_stats(counter, uval,
1150				first_shadow_cpu(counter, id),
1151				&out);
1152	if (!csv_output && !metric_only) {
1153		print_noise(counter, noise);
1154		print_running(run, ena);
1155	}
1156}
1157
1158static void aggr_update_shadow(void)
1159{
1160	int cpu, s2, id, s;
1161	u64 val;
1162	struct perf_evsel *counter;
1163
1164	for (s = 0; s < aggr_map->nr; s++) {
1165		id = aggr_map->map[s];
1166		evlist__for_each_entry(evsel_list, counter) {
1167			val = 0;
1168			for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1169				s2 = aggr_get_id(evsel_list->cpus, cpu);
1170				if (s2 != id)
1171					continue;
1172				val += perf_counts(counter->counts, cpu, 0)->val;
1173			}
1174			val = val * counter->scale;
1175			perf_stat__update_shadow_stats(counter, &val,
1176						       first_shadow_cpu(counter, id));
1177		}
1178	}
1179}
1180
1181static void print_aggr(char *prefix)
1182{
1183	FILE *output = stat_config.output;
1184	struct perf_evsel *counter;
1185	int cpu, s, s2, id, nr;
1186	double uval;
1187	u64 ena, run, val;
1188	bool first;
1189
1190	if (!(aggr_map || aggr_get_id))
1191		return;
1192
1193	aggr_update_shadow();
1194
1195	/*
1196	 * With metric_only everything is on a single line.
1197	 * Without each counter has its own line.
1198	 */
1199	for (s = 0; s < aggr_map->nr; s++) {
1200		if (prefix && metric_only)
1201			fprintf(output, "%s", prefix);
1202
1203		id = aggr_map->map[s];
1204		first = true;
1205		evlist__for_each_entry(evsel_list, counter) {
1206			val = ena = run = 0;
1207			nr = 0;
1208			for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1209				s2 = aggr_get_id(perf_evsel__cpus(counter), cpu);
1210				if (s2 != id)
1211					continue;
1212				val += perf_counts(counter->counts, cpu, 0)->val;
1213				ena += perf_counts(counter->counts, cpu, 0)->ena;
1214				run += perf_counts(counter->counts, cpu, 0)->run;
1215				nr++;
1216			}
1217			if (first && metric_only) {
1218				first = false;
1219				aggr_printout(counter, id, nr);
1220			}
1221			if (prefix && !metric_only)
1222				fprintf(output, "%s", prefix);
1223
1224			uval = val * counter->scale;
1225			printout(id, nr, counter, uval, prefix, run, ena, 1.0);
1226			if (!metric_only)
1227				fputc('\n', output);
1228		}
1229		if (metric_only)
1230			fputc('\n', output);
1231	}
1232}
1233
1234static void print_aggr_thread(struct perf_evsel *counter, char *prefix)
1235{
1236	FILE *output = stat_config.output;
1237	int nthreads = thread_map__nr(counter->threads);
1238	int ncpus = cpu_map__nr(counter->cpus);
1239	int cpu, thread;
1240	double uval;
1241
1242	for (thread = 0; thread < nthreads; thread++) {
1243		u64 ena = 0, run = 0, val = 0;
1244
1245		for (cpu = 0; cpu < ncpus; cpu++) {
1246			val += perf_counts(counter->counts, cpu, thread)->val;
1247			ena += perf_counts(counter->counts, cpu, thread)->ena;
1248			run += perf_counts(counter->counts, cpu, thread)->run;
1249		}
1250
1251		if (prefix)
1252			fprintf(output, "%s", prefix);
1253
1254		uval = val * counter->scale;
1255		printout(thread, 0, counter, uval, prefix, run, ena, 1.0);
1256		fputc('\n', output);
1257	}
1258}
1259
1260/*
1261 * Print out the results of a single counter:
1262 * aggregated counts in system-wide mode
1263 */
1264static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1265{
1266	FILE *output = stat_config.output;
1267	struct perf_stat_evsel *ps = counter->priv;
1268	double avg = avg_stats(&ps->res_stats[0]);
1269	double uval;
1270	double avg_enabled, avg_running;
1271
1272	avg_enabled = avg_stats(&ps->res_stats[1]);
1273	avg_running = avg_stats(&ps->res_stats[2]);
1274
1275	if (prefix && !metric_only)
1276		fprintf(output, "%s", prefix);
1277
1278	uval = avg * counter->scale;
1279	printout(-1, 0, counter, uval, prefix, avg_running, avg_enabled, avg);
1280	if (!metric_only)
1281		fprintf(output, "\n");
1282}
1283
1284/*
1285 * Print out the results of a single counter:
1286 * does not use aggregated count in system-wide
1287 */
1288static void print_counter(struct perf_evsel *counter, char *prefix)
1289{
1290	FILE *output = stat_config.output;
1291	u64 ena, run, val;
1292	double uval;
1293	int cpu;
1294
1295	for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1296		val = perf_counts(counter->counts, cpu, 0)->val;
1297		ena = perf_counts(counter->counts, cpu, 0)->ena;
1298		run = perf_counts(counter->counts, cpu, 0)->run;
1299
1300		if (prefix)
1301			fprintf(output, "%s", prefix);
1302
1303		uval = val * counter->scale;
1304		printout(cpu, 0, counter, uval, prefix, run, ena, 1.0);
1305
1306		fputc('\n', output);
1307	}
1308}
1309
1310static void print_no_aggr_metric(char *prefix)
1311{
1312	int cpu;
1313	int nrcpus = 0;
1314	struct perf_evsel *counter;
1315	u64 ena, run, val;
1316	double uval;
1317
1318	nrcpus = evsel_list->cpus->nr;
1319	for (cpu = 0; cpu < nrcpus; cpu++) {
1320		bool first = true;
1321
1322		if (prefix)
1323			fputs(prefix, stat_config.output);
1324		evlist__for_each_entry(evsel_list, counter) {
1325			if (first) {
1326				aggr_printout(counter, cpu, 0);
1327				first = false;
1328			}
1329			val = perf_counts(counter->counts, cpu, 0)->val;
1330			ena = perf_counts(counter->counts, cpu, 0)->ena;
1331			run = perf_counts(counter->counts, cpu, 0)->run;
1332
1333			uval = val * counter->scale;
1334			printout(cpu, 0, counter, uval, prefix, run, ena, 1.0);
1335		}
1336		fputc('\n', stat_config.output);
1337	}
1338}
1339
1340static int aggr_header_lens[] = {
1341	[AGGR_CORE] = 18,
1342	[AGGR_SOCKET] = 12,
1343	[AGGR_NONE] = 6,
1344	[AGGR_THREAD] = 24,
1345	[AGGR_GLOBAL] = 0,
1346};
1347
1348static const char *aggr_header_csv[] = {
1349	[AGGR_CORE] 	= 	"core,cpus,",
1350	[AGGR_SOCKET] 	= 	"socket,cpus",
1351	[AGGR_NONE] 	= 	"cpu,",
1352	[AGGR_THREAD] 	= 	"comm-pid,",
1353	[AGGR_GLOBAL] 	=	""
1354};
1355
1356static void print_metric_headers(const char *prefix, bool no_indent)
1357{
1358	struct perf_stat_output_ctx out;
1359	struct perf_evsel *counter;
1360	struct outstate os = {
1361		.fh = stat_config.output
1362	};
1363
1364	if (prefix)
1365		fprintf(stat_config.output, "%s", prefix);
1366
1367	if (!csv_output && !no_indent)
1368		fprintf(stat_config.output, "%*s",
1369			aggr_header_lens[stat_config.aggr_mode], "");
1370	if (csv_output) {
1371		if (stat_config.interval)
1372			fputs("time,", stat_config.output);
1373		fputs(aggr_header_csv[stat_config.aggr_mode],
1374			stat_config.output);
1375	}
1376
1377	/* Print metrics headers only */
1378	evlist__for_each_entry(evsel_list, counter) {
1379		os.evsel = counter;
1380		out.ctx = &os;
1381		out.print_metric = print_metric_header;
1382		out.new_line = new_line_metric;
1383		os.evsel = counter;
1384		perf_stat__print_shadow_stats(counter, 0,
1385					      0,
1386					      &out);
1387	}
1388	fputc('\n', stat_config.output);
1389}
1390
1391static void print_interval(char *prefix, struct timespec *ts)
1392{
1393	FILE *output = stat_config.output;
1394	static int num_print_interval;
1395
1396	sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, csv_sep);
1397
1398	if (num_print_interval == 0 && !csv_output) {
1399		switch (stat_config.aggr_mode) {
1400		case AGGR_SOCKET:
1401			fprintf(output, "#           time socket cpus");
1402			if (!metric_only)
1403				fprintf(output, "             counts %*s events\n", unit_width, "unit");
1404			break;
1405		case AGGR_CORE:
1406			fprintf(output, "#           time core         cpus");
1407			if (!metric_only)
1408				fprintf(output, "             counts %*s events\n", unit_width, "unit");
1409			break;
1410		case AGGR_NONE:
1411			fprintf(output, "#           time CPU");
1412			if (!metric_only)
1413				fprintf(output, "                counts %*s events\n", unit_width, "unit");
1414			break;
1415		case AGGR_THREAD:
1416			fprintf(output, "#           time             comm-pid");
1417			if (!metric_only)
1418				fprintf(output, "                  counts %*s events\n", unit_width, "unit");
1419			break;
1420		case AGGR_GLOBAL:
1421		default:
1422			fprintf(output, "#           time");
1423			if (!metric_only)
1424				fprintf(output, "             counts %*s events\n", unit_width, "unit");
1425		case AGGR_UNSET:
1426			break;
1427		}
1428	}
1429
1430	if (num_print_interval == 0 && metric_only)
1431		print_metric_headers(" ", true);
1432	if (++num_print_interval == 25)
1433		num_print_interval = 0;
1434}
1435
1436static void print_header(int argc, const char **argv)
1437{
1438	FILE *output = stat_config.output;
1439	int i;
1440
1441	fflush(stdout);
1442
1443	if (!csv_output) {
1444		fprintf(output, "\n");
1445		fprintf(output, " Performance counter stats for ");
1446		if (target.system_wide)
1447			fprintf(output, "\'system wide");
1448		else if (target.cpu_list)
1449			fprintf(output, "\'CPU(s) %s", target.cpu_list);
1450		else if (!target__has_task(&target)) {
1451			fprintf(output, "\'%s", argv ? argv[0] : "pipe");
1452			for (i = 1; argv && (i < argc); i++)
1453				fprintf(output, " %s", argv[i]);
1454		} else if (target.pid)
1455			fprintf(output, "process id \'%s", target.pid);
1456		else
1457			fprintf(output, "thread id \'%s", target.tid);
1458
1459		fprintf(output, "\'");
1460		if (run_count > 1)
1461			fprintf(output, " (%d runs)", run_count);
1462		fprintf(output, ":\n\n");
1463	}
1464}
1465
1466static void print_footer(void)
1467{
1468	FILE *output = stat_config.output;
1469
1470	if (!null_run)
1471		fprintf(output, "\n");
1472	fprintf(output, " %17.9f seconds time elapsed",
1473			avg_stats(&walltime_nsecs_stats) / NSEC_PER_SEC);
1474	if (run_count > 1) {
1475		fprintf(output, "                                        ");
1476		print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1477				avg_stats(&walltime_nsecs_stats));
1478	}
1479	fprintf(output, "\n\n");
1480}
1481
1482static void print_counters(struct timespec *ts, int argc, const char **argv)
1483{
1484	int interval = stat_config.interval;
1485	struct perf_evsel *counter;
1486	char buf[64], *prefix = NULL;
1487
1488	/* Do not print anything if we record to the pipe. */
1489	if (STAT_RECORD && perf_stat.file.is_pipe)
1490		return;
1491
1492	if (interval)
1493		print_interval(prefix = buf, ts);
1494	else
1495		print_header(argc, argv);
1496
1497	if (metric_only) {
1498		static int num_print_iv;
1499
1500		if (num_print_iv == 0 && !interval)
1501			print_metric_headers(prefix, false);
1502		if (num_print_iv++ == 25)
1503			num_print_iv = 0;
1504		if (stat_config.aggr_mode == AGGR_GLOBAL && prefix)
1505			fprintf(stat_config.output, "%s", prefix);
1506	}
1507
1508	switch (stat_config.aggr_mode) {
1509	case AGGR_CORE:
1510	case AGGR_SOCKET:
1511		print_aggr(prefix);
1512		break;
1513	case AGGR_THREAD:
1514		evlist__for_each_entry(evsel_list, counter)
1515			print_aggr_thread(counter, prefix);
1516		break;
1517	case AGGR_GLOBAL:
1518		evlist__for_each_entry(evsel_list, counter)
1519			print_counter_aggr(counter, prefix);
1520		if (metric_only)
1521			fputc('\n', stat_config.output);
1522		break;
1523	case AGGR_NONE:
1524		if (metric_only)
1525			print_no_aggr_metric(prefix);
1526		else {
1527			evlist__for_each_entry(evsel_list, counter)
1528				print_counter(counter, prefix);
1529		}
1530		break;
1531	case AGGR_UNSET:
1532	default:
1533		break;
1534	}
1535
1536	if (!interval && !csv_output)
1537		print_footer();
1538
1539	fflush(stat_config.output);
1540}
1541
1542static volatile int signr = -1;
1543
1544static void skip_signal(int signo)
1545{
1546	if ((child_pid == -1) || stat_config.interval)
1547		done = 1;
1548
1549	signr = signo;
1550	/*
1551	 * render child_pid harmless
1552	 * won't send SIGTERM to a random
1553	 * process in case of race condition
1554	 * and fast PID recycling
1555	 */
1556	child_pid = -1;
1557}
1558
1559static void sig_atexit(void)
1560{
1561	sigset_t set, oset;
1562
1563	/*
1564	 * avoid race condition with SIGCHLD handler
1565	 * in skip_signal() which is modifying child_pid
1566	 * goal is to avoid send SIGTERM to a random
1567	 * process
1568	 */
1569	sigemptyset(&set);
1570	sigaddset(&set, SIGCHLD);
1571	sigprocmask(SIG_BLOCK, &set, &oset);
1572
1573	if (child_pid != -1)
1574		kill(child_pid, SIGTERM);
1575
1576	sigprocmask(SIG_SETMASK, &oset, NULL);
1577
1578	if (signr == -1)
1579		return;
1580
1581	signal(signr, SIG_DFL);
1582	kill(getpid(), signr);
1583}
1584
1585static int stat__set_big_num(const struct option *opt __maybe_unused,
1586			     const char *s __maybe_unused, int unset)
1587{
1588	big_num_opt = unset ? 0 : 1;
1589	return 0;
1590}
1591
1592static int enable_metric_only(const struct option *opt __maybe_unused,
1593			      const char *s __maybe_unused, int unset)
1594{
1595	force_metric_only = true;
1596	metric_only = !unset;
1597	return 0;
1598}
1599
1600static const struct option stat_options[] = {
1601	OPT_BOOLEAN('T', "transaction", &transaction_run,
1602		    "hardware transaction statistics"),
1603	OPT_CALLBACK('e', "event", &evsel_list, "event",
1604		     "event selector. use 'perf list' to list available events",
1605		     parse_events_option),
1606	OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1607		     "event filter", parse_filter),
1608	OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1609		    "child tasks do not inherit counters"),
1610	OPT_STRING('p', "pid", &target.pid, "pid",
1611		   "stat events on existing process id"),
1612	OPT_STRING('t', "tid", &target.tid, "tid",
1613		   "stat events on existing thread id"),
1614	OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1615		    "system-wide collection from all CPUs"),
1616	OPT_BOOLEAN('g', "group", &group,
1617		    "put the counters into a counter group"),
1618	OPT_BOOLEAN('c', "scale", &stat_config.scale, "scale/normalize counters"),
1619	OPT_INCR('v', "verbose", &verbose,
1620		    "be more verbose (show counter open errors, etc)"),
1621	OPT_INTEGER('r', "repeat", &run_count,
1622		    "repeat command and print average + stddev (max: 100, forever: 0)"),
1623	OPT_BOOLEAN('n', "null", &null_run,
1624		    "null run - dont start any counters"),
1625	OPT_INCR('d', "detailed", &detailed_run,
1626		    "detailed run - start a lot of events"),
1627	OPT_BOOLEAN('S', "sync", &sync_run,
1628		    "call sync() before starting a run"),
1629	OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1630			   "print large numbers with thousands\' separators",
1631			   stat__set_big_num),
1632	OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1633		    "list of cpus to monitor in system-wide"),
1634	OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1635		    "disable CPU count aggregation", AGGR_NONE),
1636	OPT_STRING('x', "field-separator", &csv_sep, "separator",
1637		   "print counts with custom separator"),
1638	OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1639		     "monitor event in cgroup name only", parse_cgroups),
1640	OPT_STRING('o', "output", &output_name, "file", "output file name"),
1641	OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1642	OPT_INTEGER(0, "log-fd", &output_fd,
1643		    "log output to fd, instead of stderr"),
1644	OPT_STRING(0, "pre", &pre_cmd, "command",
1645			"command to run prior to the measured command"),
1646	OPT_STRING(0, "post", &post_cmd, "command",
1647			"command to run after to the measured command"),
1648	OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1649		    "print counts at regular interval in ms (>= 10)"),
1650	OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1651		     "aggregate counts per processor socket", AGGR_SOCKET),
1652	OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1653		     "aggregate counts per physical processor core", AGGR_CORE),
1654	OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1655		     "aggregate counts per thread", AGGR_THREAD),
1656	OPT_UINTEGER('D', "delay", &initial_delay,
1657		     "ms to wait before starting measurement after program start"),
1658	OPT_CALLBACK_NOOPT(0, "metric-only", &metric_only, NULL,
1659			"Only print computed metrics. No raw values", enable_metric_only),
1660	OPT_BOOLEAN(0, "topdown", &topdown_run,
1661			"measure topdown level 1 statistics"),
1662	OPT_END()
1663};
1664
1665static int perf_stat__get_socket(struct cpu_map *map, int cpu)
1666{
1667	return cpu_map__get_socket(map, cpu, NULL);
1668}
1669
1670static int perf_stat__get_core(struct cpu_map *map, int cpu)
1671{
1672	return cpu_map__get_core(map, cpu, NULL);
1673}
1674
1675static int cpu_map__get_max(struct cpu_map *map)
1676{
1677	int i, max = -1;
1678
1679	for (i = 0; i < map->nr; i++) {
1680		if (map->map[i] > max)
1681			max = map->map[i];
1682	}
1683
1684	return max;
1685}
1686
1687static struct cpu_map *cpus_aggr_map;
1688
1689static int perf_stat__get_aggr(aggr_get_id_t get_id, struct cpu_map *map, int idx)
1690{
1691	int cpu;
1692
1693	if (idx >= map->nr)
1694		return -1;
1695
1696	cpu = map->map[idx];
1697
1698	if (cpus_aggr_map->map[cpu] == -1)
1699		cpus_aggr_map->map[cpu] = get_id(map, idx);
1700
1701	return cpus_aggr_map->map[cpu];
1702}
1703
1704static int perf_stat__get_socket_cached(struct cpu_map *map, int idx)
1705{
1706	return perf_stat__get_aggr(perf_stat__get_socket, map, idx);
1707}
1708
1709static int perf_stat__get_core_cached(struct cpu_map *map, int idx)
1710{
1711	return perf_stat__get_aggr(perf_stat__get_core, map, idx);
1712}
1713
1714static int perf_stat_init_aggr_mode(void)
1715{
1716	int nr;
1717
1718	switch (stat_config.aggr_mode) {
1719	case AGGR_SOCKET:
1720		if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1721			perror("cannot build socket map");
1722			return -1;
1723		}
1724		aggr_get_id = perf_stat__get_socket_cached;
1725		break;
1726	case AGGR_CORE:
1727		if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1728			perror("cannot build core map");
1729			return -1;
1730		}
1731		aggr_get_id = perf_stat__get_core_cached;
1732		break;
1733	case AGGR_NONE:
1734	case AGGR_GLOBAL:
1735	case AGGR_THREAD:
1736	case AGGR_UNSET:
1737	default:
1738		break;
1739	}
1740
1741	/*
1742	 * The evsel_list->cpus is the base we operate on,
1743	 * taking the highest cpu number to be the size of
1744	 * the aggregation translate cpumap.
1745	 */
1746	nr = cpu_map__get_max(evsel_list->cpus);
1747	cpus_aggr_map = cpu_map__empty_new(nr + 1);
1748	return cpus_aggr_map ? 0 : -ENOMEM;
1749}
1750
1751static void perf_stat__exit_aggr_mode(void)
1752{
1753	cpu_map__put(aggr_map);
1754	cpu_map__put(cpus_aggr_map);
1755	aggr_map = NULL;
1756	cpus_aggr_map = NULL;
1757}
1758
1759static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
1760{
1761	int cpu;
1762
1763	if (idx > map->nr)
1764		return -1;
1765
1766	cpu = map->map[idx];
1767
1768	if (cpu >= env->nr_cpus_online)
1769		return -1;
1770
1771	return cpu;
1772}
1773
1774static int perf_env__get_socket(struct cpu_map *map, int idx, void *data)
1775{
1776	struct perf_env *env = data;
1777	int cpu = perf_env__get_cpu(env, map, idx);
1778
1779	return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
1780}
1781
1782static int perf_env__get_core(struct cpu_map *map, int idx, void *data)
1783{
1784	struct perf_env *env = data;
1785	int core = -1, cpu = perf_env__get_cpu(env, map, idx);
1786
1787	if (cpu != -1) {
1788		int socket_id = env->cpu[cpu].socket_id;
1789
1790		/*
1791		 * Encode socket in upper 16 bits
1792		 * core_id is relative to socket, and
1793		 * we need a global id. So we combine
1794		 * socket + core id.
1795		 */
1796		core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff);
1797	}
1798
1799	return core;
1800}
1801
1802static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
1803				      struct cpu_map **sockp)
1804{
1805	return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
1806}
1807
1808static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
1809				    struct cpu_map **corep)
1810{
1811	return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
1812}
1813
1814static int perf_stat__get_socket_file(struct cpu_map *map, int idx)
1815{
1816	return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
1817}
1818
1819static int perf_stat__get_core_file(struct cpu_map *map, int idx)
1820{
1821	return perf_env__get_core(map, idx, &perf_stat.session->header.env);
1822}
1823
1824static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1825{
1826	struct perf_env *env = &st->session->header.env;
1827
1828	switch (stat_config.aggr_mode) {
1829	case AGGR_SOCKET:
1830		if (perf_env__build_socket_map(env, evsel_list->cpus, &aggr_map)) {
1831			perror("cannot build socket map");
1832			return -1;
1833		}
1834		aggr_get_id = perf_stat__get_socket_file;
1835		break;
1836	case AGGR_CORE:
1837		if (perf_env__build_core_map(env, evsel_list->cpus, &aggr_map)) {
1838			perror("cannot build core map");
1839			return -1;
1840		}
1841		aggr_get_id = perf_stat__get_core_file;
1842		break;
1843	case AGGR_NONE:
1844	case AGGR_GLOBAL:
1845	case AGGR_THREAD:
1846	case AGGR_UNSET:
1847	default:
1848		break;
1849	}
1850
1851	return 0;
1852}
1853
1854static int topdown_filter_events(const char **attr, char **str, bool use_group)
1855{
1856	int off = 0;
1857	int i;
1858	int len = 0;
1859	char *s;
1860
1861	for (i = 0; attr[i]; i++) {
1862		if (pmu_have_event("cpu", attr[i])) {
1863			len += strlen(attr[i]) + 1;
1864			attr[i - off] = attr[i];
1865		} else
1866			off++;
1867	}
1868	attr[i - off] = NULL;
1869
1870	*str = malloc(len + 1 + 2);
1871	if (!*str)
1872		return -1;
1873	s = *str;
1874	if (i - off == 0) {
1875		*s = 0;
1876		return 0;
1877	}
1878	if (use_group)
1879		*s++ = '{';
1880	for (i = 0; attr[i]; i++) {
1881		strcpy(s, attr[i]);
1882		s += strlen(s);
1883		*s++ = ',';
1884	}
1885	if (use_group) {
1886		s[-1] = '}';
1887		*s = 0;
1888	} else
1889		s[-1] = 0;
1890	return 0;
1891}
1892
1893__weak bool arch_topdown_check_group(bool *warn)
1894{
1895	*warn = false;
1896	return false;
1897}
1898
1899__weak void arch_topdown_group_warn(void)
1900{
1901}
1902
1903/*
1904 * Add default attributes, if there were no attributes specified or
1905 * if -d/--detailed, -d -d or -d -d -d is used:
1906 */
1907static int add_default_attributes(void)
1908{
1909	int err;
1910	struct perf_event_attr default_attrs0[] = {
1911
1912  { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK		},
1913  { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES	},
1914  { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS		},
1915  { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS		},
1916
1917  { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES		},
1918};
1919	struct perf_event_attr frontend_attrs[] = {
1920  { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND	},
1921};
1922	struct perf_event_attr backend_attrs[] = {
1923  { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND	},
1924};
1925	struct perf_event_attr default_attrs1[] = {
1926  { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS		},
1927  { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS	},
1928  { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES		},
1929
1930};
1931
1932/*
1933 * Detailed stats (-d), covering the L1 and last level data caches:
1934 */
1935	struct perf_event_attr detailed_attrs[] = {
1936
1937  { .type = PERF_TYPE_HW_CACHE,
1938    .config =
1939	 PERF_COUNT_HW_CACHE_L1D		<<  0  |
1940	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1941	(PERF_COUNT_HW_CACHE_RESULT_ACCESS	<< 16)				},
1942
1943  { .type = PERF_TYPE_HW_CACHE,
1944    .config =
1945	 PERF_COUNT_HW_CACHE_L1D		<<  0  |
1946	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1947	(PERF_COUNT_HW_CACHE_RESULT_MISS	<< 16)				},
1948
1949  { .type = PERF_TYPE_HW_CACHE,
1950    .config =
1951	 PERF_COUNT_HW_CACHE_LL			<<  0  |
1952	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1953	(PERF_COUNT_HW_CACHE_RESULT_ACCESS	<< 16)				},
1954
1955  { .type = PERF_TYPE_HW_CACHE,
1956    .config =
1957	 PERF_COUNT_HW_CACHE_LL			<<  0  |
1958	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1959	(PERF_COUNT_HW_CACHE_RESULT_MISS	<< 16)				},
1960};
1961
1962/*
1963 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1964 */
1965	struct perf_event_attr very_detailed_attrs[] = {
1966
1967  { .type = PERF_TYPE_HW_CACHE,
1968    .config =
1969	 PERF_COUNT_HW_CACHE_L1I		<<  0  |
1970	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1971	(PERF_COUNT_HW_CACHE_RESULT_ACCESS	<< 16)				},
1972
1973  { .type = PERF_TYPE_HW_CACHE,
1974    .config =
1975	 PERF_COUNT_HW_CACHE_L1I		<<  0  |
1976	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1977	(PERF_COUNT_HW_CACHE_RESULT_MISS	<< 16)				},
1978
1979  { .type = PERF_TYPE_HW_CACHE,
1980    .config =
1981	 PERF_COUNT_HW_CACHE_DTLB		<<  0  |
1982	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1983	(PERF_COUNT_HW_CACHE_RESULT_ACCESS	<< 16)				},
1984
1985  { .type = PERF_TYPE_HW_CACHE,
1986    .config =
1987	 PERF_COUNT_HW_CACHE_DTLB		<<  0  |
1988	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1989	(PERF_COUNT_HW_CACHE_RESULT_MISS	<< 16)				},
1990
1991  { .type = PERF_TYPE_HW_CACHE,
1992    .config =
1993	 PERF_COUNT_HW_CACHE_ITLB		<<  0  |
1994	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1995	(PERF_COUNT_HW_CACHE_RESULT_ACCESS	<< 16)				},
1996
1997  { .type = PERF_TYPE_HW_CACHE,
1998    .config =
1999	 PERF_COUNT_HW_CACHE_ITLB		<<  0  |
2000	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
2001	(PERF_COUNT_HW_CACHE_RESULT_MISS	<< 16)				},
2002
2003};
2004
2005/*
2006 * Very, very detailed stats (-d -d -d), adding prefetch events:
2007 */
2008	struct perf_event_attr very_very_detailed_attrs[] = {
2009
2010  { .type = PERF_TYPE_HW_CACHE,
2011    .config =
2012	 PERF_COUNT_HW_CACHE_L1D		<<  0  |
2013	(PERF_COUNT_HW_CACHE_OP_PREFETCH	<<  8) |
2014	(PERF_COUNT_HW_CACHE_RESULT_ACCESS	<< 16)				},
2015
2016  { .type = PERF_TYPE_HW_CACHE,
2017    .config =
2018	 PERF_COUNT_HW_CACHE_L1D		<<  0  |
2019	(PERF_COUNT_HW_CACHE_OP_PREFETCH	<<  8) |
2020	(PERF_COUNT_HW_CACHE_RESULT_MISS	<< 16)				},
2021};
2022
2023	/* Set attrs if no event is selected and !null_run: */
2024	if (null_run)
2025		return 0;
2026
2027	if (transaction_run) {
 
2028		if (pmu_have_event("cpu", "cycles-ct") &&
2029		    pmu_have_event("cpu", "el-start"))
2030			err = parse_events(evsel_list, transaction_attrs, NULL);
2031		else
2032			err = parse_events(evsel_list, transaction_limited_attrs, NULL);
2033		if (err) {
2034			fprintf(stderr, "Cannot set up transaction events\n");
2035			return -1;
2036		}
2037		return 0;
2038	}
2039
2040	if (topdown_run) {
2041		char *str = NULL;
2042		bool warn = false;
2043
2044		if (stat_config.aggr_mode != AGGR_GLOBAL &&
2045		    stat_config.aggr_mode != AGGR_CORE) {
2046			pr_err("top down event configuration requires --per-core mode\n");
2047			return -1;
2048		}
2049		stat_config.aggr_mode = AGGR_CORE;
2050		if (nr_cgroups || !target__has_cpu(&target)) {
2051			pr_err("top down event configuration requires system-wide mode (-a)\n");
2052			return -1;
2053		}
2054
2055		if (!force_metric_only)
2056			metric_only = true;
2057		if (topdown_filter_events(topdown_attrs, &str,
2058				arch_topdown_check_group(&warn)) < 0) {
2059			pr_err("Out of memory\n");
2060			return -1;
2061		}
2062		if (topdown_attrs[0] && str) {
2063			if (warn)
2064				arch_topdown_group_warn();
2065			err = parse_events(evsel_list, str, NULL);
2066			if (err) {
2067				fprintf(stderr,
2068					"Cannot set up top down events %s: %d\n",
2069					str, err);
2070				free(str);
2071				return -1;
2072			}
2073		} else {
2074			fprintf(stderr, "System does not support topdown\n");
2075			return -1;
2076		}
2077		free(str);
2078	}
2079
2080	if (!evsel_list->nr_entries) {
2081		if (target__has_cpu(&target))
2082			default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
2083
2084		if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
2085			return -1;
2086		if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
2087			if (perf_evlist__add_default_attrs(evsel_list,
2088						frontend_attrs) < 0)
2089				return -1;
2090		}
2091		if (pmu_have_event("cpu", "stalled-cycles-backend")) {
2092			if (perf_evlist__add_default_attrs(evsel_list,
2093						backend_attrs) < 0)
2094				return -1;
2095		}
2096		if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
2097			return -1;
2098	}
2099
2100	/* Detailed events get appended to the event list: */
2101
2102	if (detailed_run <  1)
2103		return 0;
2104
2105	/* Append detailed run extra attributes: */
2106	if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
2107		return -1;
2108
2109	if (detailed_run < 2)
2110		return 0;
2111
2112	/* Append very detailed run extra attributes: */
2113	if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
2114		return -1;
2115
2116	if (detailed_run < 3)
2117		return 0;
2118
2119	/* Append very, very detailed run extra attributes: */
2120	return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
2121}
2122
2123static const char * const stat_record_usage[] = {
2124	"perf stat record [<options>]",
2125	NULL,
2126};
2127
2128static void init_features(struct perf_session *session)
2129{
2130	int feat;
2131
2132	for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
2133		perf_header__set_feat(&session->header, feat);
2134
2135	perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
2136	perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
2137	perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
2138	perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
2139}
2140
2141static int __cmd_record(int argc, const char **argv)
2142{
2143	struct perf_session *session;
2144	struct perf_data_file *file = &perf_stat.file;
2145
2146	argc = parse_options(argc, argv, stat_options, stat_record_usage,
2147			     PARSE_OPT_STOP_AT_NON_OPTION);
2148
2149	if (output_name)
2150		file->path = output_name;
2151
2152	if (run_count != 1 || forever) {
2153		pr_err("Cannot use -r option with perf stat record.\n");
2154		return -1;
2155	}
2156
2157	session = perf_session__new(file, false, NULL);
2158	if (session == NULL) {
2159		pr_err("Perf session creation failed.\n");
2160		return -1;
2161	}
2162
2163	init_features(session);
2164
2165	session->evlist   = evsel_list;
2166	perf_stat.session = session;
2167	perf_stat.record  = true;
2168	return argc;
2169}
2170
2171static int process_stat_round_event(struct perf_tool *tool __maybe_unused,
2172				    union perf_event *event,
2173				    struct perf_session *session)
2174{
2175	struct stat_round_event *stat_round = &event->stat_round;
2176	struct perf_evsel *counter;
2177	struct timespec tsh, *ts = NULL;
2178	const char **argv = session->header.env.cmdline_argv;
2179	int argc = session->header.env.nr_cmdline;
2180
2181	evlist__for_each_entry(evsel_list, counter)
2182		perf_stat_process_counter(&stat_config, counter);
2183
2184	if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
2185		update_stats(&walltime_nsecs_stats, stat_round->time);
2186
2187	if (stat_config.interval && stat_round->time) {
2188		tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
2189		tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
2190		ts = &tsh;
2191	}
2192
2193	print_counters(ts, argc, argv);
2194	return 0;
2195}
2196
2197static
2198int process_stat_config_event(struct perf_tool *tool,
2199			      union perf_event *event,
2200			      struct perf_session *session __maybe_unused)
2201{
2202	struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2203
2204	perf_event__read_stat_config(&stat_config, &event->stat_config);
2205
2206	if (cpu_map__empty(st->cpus)) {
2207		if (st->aggr_mode != AGGR_UNSET)
2208			pr_warning("warning: processing task data, aggregation mode not set\n");
2209		return 0;
2210	}
2211
2212	if (st->aggr_mode != AGGR_UNSET)
2213		stat_config.aggr_mode = st->aggr_mode;
2214
2215	if (perf_stat.file.is_pipe)
2216		perf_stat_init_aggr_mode();
2217	else
2218		perf_stat_init_aggr_mode_file(st);
2219
2220	return 0;
2221}
2222
2223static int set_maps(struct perf_stat *st)
2224{
2225	if (!st->cpus || !st->threads)
2226		return 0;
2227
2228	if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
2229		return -EINVAL;
2230
2231	perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
2232
2233	if (perf_evlist__alloc_stats(evsel_list, true))
2234		return -ENOMEM;
2235
2236	st->maps_allocated = true;
2237	return 0;
2238}
2239
2240static
2241int process_thread_map_event(struct perf_tool *tool,
2242			     union perf_event *event,
2243			     struct perf_session *session __maybe_unused)
2244{
2245	struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2246
2247	if (st->threads) {
2248		pr_warning("Extra thread map event, ignoring.\n");
2249		return 0;
2250	}
2251
2252	st->threads = thread_map__new_event(&event->thread_map);
2253	if (!st->threads)
2254		return -ENOMEM;
2255
2256	return set_maps(st);
2257}
2258
2259static
2260int process_cpu_map_event(struct perf_tool *tool,
2261			  union perf_event *event,
2262			  struct perf_session *session __maybe_unused)
2263{
2264	struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2265	struct cpu_map *cpus;
2266
2267	if (st->cpus) {
2268		pr_warning("Extra cpu map event, ignoring.\n");
2269		return 0;
2270	}
2271
2272	cpus = cpu_map__new_data(&event->cpu_map.data);
2273	if (!cpus)
2274		return -ENOMEM;
2275
2276	st->cpus = cpus;
2277	return set_maps(st);
2278}
2279
2280static const char * const stat_report_usage[] = {
2281	"perf stat report [<options>]",
2282	NULL,
2283};
2284
2285static struct perf_stat perf_stat = {
2286	.tool = {
2287		.attr		= perf_event__process_attr,
2288		.event_update	= perf_event__process_event_update,
2289		.thread_map	= process_thread_map_event,
2290		.cpu_map	= process_cpu_map_event,
2291		.stat_config	= process_stat_config_event,
2292		.stat		= perf_event__process_stat_event,
2293		.stat_round	= process_stat_round_event,
2294	},
2295	.aggr_mode = AGGR_UNSET,
2296};
2297
2298static int __cmd_report(int argc, const char **argv)
2299{
2300	struct perf_session *session;
2301	const struct option options[] = {
2302	OPT_STRING('i', "input", &input_name, "file", "input file name"),
2303	OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
2304		     "aggregate counts per processor socket", AGGR_SOCKET),
2305	OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
2306		     "aggregate counts per physical processor core", AGGR_CORE),
2307	OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
2308		     "disable CPU count aggregation", AGGR_NONE),
2309	OPT_END()
2310	};
2311	struct stat st;
2312	int ret;
2313
2314	argc = parse_options(argc, argv, options, stat_report_usage, 0);
2315
2316	if (!input_name || !strlen(input_name)) {
2317		if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2318			input_name = "-";
2319		else
2320			input_name = "perf.data";
2321	}
2322
2323	perf_stat.file.path = input_name;
2324	perf_stat.file.mode = PERF_DATA_MODE_READ;
2325
2326	session = perf_session__new(&perf_stat.file, false, &perf_stat.tool);
2327	if (session == NULL)
2328		return -1;
2329
2330	perf_stat.session  = session;
2331	stat_config.output = stderr;
2332	evsel_list         = session->evlist;
2333
2334	ret = perf_session__process_events(session);
2335	if (ret)
2336		return ret;
2337
2338	perf_session__delete(session);
2339	return 0;
2340}
2341
2342int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
2343{
2344	const char * const stat_usage[] = {
2345		"perf stat [<options>] [<command>]",
2346		NULL
2347	};
2348	int status = -EINVAL, run_idx;
2349	const char *mode;
2350	FILE *output = stderr;
2351	unsigned int interval;
2352	const char * const stat_subcommands[] = { "record", "report" };
2353
2354	setlocale(LC_ALL, "");
2355
2356	evsel_list = perf_evlist__new();
2357	if (evsel_list == NULL)
2358		return -ENOMEM;
2359
2360	parse_events__shrink_config_terms();
2361	argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2362					(const char **) stat_usage,
2363					PARSE_OPT_STOP_AT_NON_OPTION);
2364	perf_stat__init_shadow_stats();
2365
2366	if (csv_sep) {
2367		csv_output = true;
2368		if (!strcmp(csv_sep, "\\t"))
2369			csv_sep = "\t";
2370	} else
2371		csv_sep = DEFAULT_SEPARATOR;
2372
2373	if (argc && !strncmp(argv[0], "rec", 3)) {
2374		argc = __cmd_record(argc, argv);
2375		if (argc < 0)
2376			return -1;
2377	} else if (argc && !strncmp(argv[0], "rep", 3))
2378		return __cmd_report(argc, argv);
2379
2380	interval = stat_config.interval;
2381
2382	/*
2383	 * For record command the -o is already taken care of.
2384	 */
2385	if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2386		output = NULL;
2387
2388	if (output_name && output_fd) {
2389		fprintf(stderr, "cannot use both --output and --log-fd\n");
2390		parse_options_usage(stat_usage, stat_options, "o", 1);
2391		parse_options_usage(NULL, stat_options, "log-fd", 0);
2392		goto out;
2393	}
2394
2395	if (metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2396		fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2397		goto out;
2398	}
2399
2400	if (metric_only && run_count > 1) {
2401		fprintf(stderr, "--metric-only is not supported with -r\n");
2402		goto out;
2403	}
2404
2405	if (output_fd < 0) {
2406		fprintf(stderr, "argument to --log-fd must be a > 0\n");
2407		parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2408		goto out;
2409	}
2410
2411	if (!output) {
2412		struct timespec tm;
2413		mode = append_file ? "a" : "w";
2414
2415		output = fopen(output_name, mode);
2416		if (!output) {
2417			perror("failed to create output file");
2418			return -1;
2419		}
2420		clock_gettime(CLOCK_REALTIME, &tm);
2421		fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2422	} else if (output_fd > 0) {
2423		mode = append_file ? "a" : "w";
2424		output = fdopen(output_fd, mode);
2425		if (!output) {
2426			perror("Failed opening logfd");
2427			return -errno;
2428		}
2429	}
2430
2431	stat_config.output = output;
2432
2433	/*
2434	 * let the spreadsheet do the pretty-printing
2435	 */
2436	if (csv_output) {
2437		/* User explicitly passed -B? */
2438		if (big_num_opt == 1) {
2439			fprintf(stderr, "-B option not supported with -x\n");
2440			parse_options_usage(stat_usage, stat_options, "B", 1);
2441			parse_options_usage(NULL, stat_options, "x", 1);
2442			goto out;
2443		} else /* Nope, so disable big number formatting */
2444			big_num = false;
2445	} else if (big_num_opt == 0) /* User passed --no-big-num */
2446		big_num = false;
2447
2448	if (!argc && target__none(&target))
2449		usage_with_options(stat_usage, stat_options);
2450
2451	if (run_count < 0) {
2452		pr_err("Run count must be a positive number\n");
2453		parse_options_usage(stat_usage, stat_options, "r", 1);
2454		goto out;
2455	} else if (run_count == 0) {
2456		forever = true;
2457		run_count = 1;
2458	}
2459
2460	if ((stat_config.aggr_mode == AGGR_THREAD) && !target__has_task(&target)) {
2461		fprintf(stderr, "The --per-thread option is only available "
2462			"when monitoring via -p -t options.\n");
2463		parse_options_usage(NULL, stat_options, "p", 1);
2464		parse_options_usage(NULL, stat_options, "t", 1);
2465		goto out;
2466	}
2467
2468	/*
2469	 * no_aggr, cgroup are for system-wide only
2470	 * --per-thread is aggregated per thread, we dont mix it with cpu mode
2471	 */
2472	if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2473	      stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
2474	    !target__has_cpu(&target)) {
2475		fprintf(stderr, "both cgroup and no-aggregation "
2476			"modes only available in system-wide mode\n");
2477
2478		parse_options_usage(stat_usage, stat_options, "G", 1);
2479		parse_options_usage(NULL, stat_options, "A", 1);
2480		parse_options_usage(NULL, stat_options, "a", 1);
2481		goto out;
2482	}
2483
2484	if (add_default_attributes())
2485		goto out;
2486
2487	target__validate(&target);
2488
2489	if (perf_evlist__create_maps(evsel_list, &target) < 0) {
2490		if (target__has_task(&target)) {
2491			pr_err("Problems finding threads of monitor\n");
2492			parse_options_usage(stat_usage, stat_options, "p", 1);
2493			parse_options_usage(NULL, stat_options, "t", 1);
2494		} else if (target__has_cpu(&target)) {
2495			perror("failed to parse CPUs map");
2496			parse_options_usage(stat_usage, stat_options, "C", 1);
2497			parse_options_usage(NULL, stat_options, "a", 1);
2498		}
2499		goto out;
2500	}
2501
2502	/*
2503	 * Initialize thread_map with comm names,
2504	 * so we could print it out on output.
2505	 */
2506	if (stat_config.aggr_mode == AGGR_THREAD)
2507		thread_map__read_comms(evsel_list->threads);
2508
2509	if (interval && interval < 100) {
2510		if (interval < 10) {
2511			pr_err("print interval must be >= 10ms\n");
2512			parse_options_usage(stat_usage, stat_options, "I", 1);
2513			goto out;
2514		} else
2515			pr_warning("print interval < 100ms. "
2516				   "The overhead percentage could be high in some cases. "
2517				   "Please proceed with caution.\n");
2518	}
2519
2520	if (perf_evlist__alloc_stats(evsel_list, interval))
2521		goto out;
2522
2523	if (perf_stat_init_aggr_mode())
2524		goto out;
2525
2526	/*
2527	 * We dont want to block the signals - that would cause
2528	 * child tasks to inherit that and Ctrl-C would not work.
2529	 * What we want is for Ctrl-C to work in the exec()-ed
2530	 * task, but being ignored by perf stat itself:
2531	 */
2532	atexit(sig_atexit);
2533	if (!forever)
2534		signal(SIGINT,  skip_signal);
2535	signal(SIGCHLD, skip_signal);
2536	signal(SIGALRM, skip_signal);
2537	signal(SIGABRT, skip_signal);
2538
2539	status = 0;
2540	for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
2541		if (run_count != 1 && verbose)
2542			fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2543				run_idx + 1);
2544
2545		status = run_perf_stat(argc, argv);
2546		if (forever && status != -1) {
2547			print_counters(NULL, argc, argv);
2548			perf_stat__reset_stats();
2549		}
2550	}
2551
2552	if (!forever && status != -1 && !interval)
2553		print_counters(NULL, argc, argv);
2554
2555	if (STAT_RECORD) {
2556		/*
2557		 * We synthesize the kernel mmap record just so that older tools
2558		 * don't emit warnings about not being able to resolve symbols
2559		 * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2560		 * a saner message about no samples being in the perf.data file.
2561		 *
2562		 * This also serves to suppress a warning about f_header.data.size == 0
2563		 * in header.c at the moment 'perf stat record' gets introduced, which
2564		 * is not really needed once we start adding the stat specific PERF_RECORD_
2565		 * records, but the need to suppress the kptr_restrict messages in older
2566		 * tools remain  -acme
2567		 */
2568		int fd = perf_data_file__fd(&perf_stat.file);
2569		int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2570							     process_synthesized_event,
2571							     &perf_stat.session->machines.host);
2572		if (err) {
2573			pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2574				   "older tools may produce warnings about this file\n.");
2575		}
2576
2577		if (!interval) {
2578			if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2579				pr_err("failed to write stat round event\n");
2580		}
2581
2582		if (!perf_stat.file.is_pipe) {
2583			perf_stat.session->header.data_size += perf_stat.bytes_written;
2584			perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2585		}
2586
2587		perf_session__delete(perf_stat.session);
2588	}
2589
2590	perf_stat__exit_aggr_mode();
2591	perf_evlist__free_stats(evsel_list);
2592out:
2593	perf_evlist__delete(evsel_list);
2594	return status;
2595}