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TOMOYO Linux Cross Reference
Linux/tools/perf/builtin-stat.c

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  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/util.h"
 47 #include "util/parse-options.h"
 48 #include "util/parse-events.h"
 49 #include "util/pmu.h"
 50 #include "util/event.h"
 51 #include "util/evlist.h"
 52 #include "util/evsel.h"
 53 #include "util/debug.h"
 54 #include "util/color.h"
 55 #include "util/stat.h"
 56 #include "util/header.h"
 57 #include "util/cpumap.h"
 58 #include "util/thread.h"
 59 #include "util/thread_map.h"
 60 
 61 #include <stdlib.h>
 62 #include <sys/prctl.h>
 63 #include <locale.h>
 64 
 65 #define DEFAULT_SEPARATOR       " "
 66 #define CNTR_NOT_SUPPORTED      "<not supported>"
 67 #define CNTR_NOT_COUNTED        "<not counted>"
 68 
 69 static void print_stat(int argc, const char **argv);
 70 static void print_counter_aggr(struct perf_evsel *counter, char *prefix);
 71 static void print_counter(struct perf_evsel *counter, char *prefix);
 72 static void print_aggr(char *prefix);
 73 
 74 /* Default events used for perf stat -T */
 75 static const char * const transaction_attrs[] = {
 76         "task-clock",
 77         "{"
 78         "instructions,"
 79         "cycles,"
 80         "cpu/cycles-t/,"
 81         "cpu/tx-start/,"
 82         "cpu/el-start/,"
 83         "cpu/cycles-ct/"
 84         "}"
 85 };
 86 
 87 /* More limited version when the CPU does not have all events. */
 88 static const char * const transaction_limited_attrs[] = {
 89         "task-clock",
 90         "{"
 91         "instructions,"
 92         "cycles,"
 93         "cpu/cycles-t/,"
 94         "cpu/tx-start/"
 95         "}"
 96 };
 97 
 98 /* must match transaction_attrs and the beginning limited_attrs */
 99 enum {
100         T_TASK_CLOCK,
101         T_INSTRUCTIONS,
102         T_CYCLES,
103         T_CYCLES_IN_TX,
104         T_TRANSACTION_START,
105         T_ELISION_START,
106         T_CYCLES_IN_TX_CP,
107 };
108 
109 static struct perf_evlist       *evsel_list;
110 
111 static struct target target = {
112         .uid    = UINT_MAX,
113 };
114 
115 enum aggr_mode {
116         AGGR_NONE,
117         AGGR_GLOBAL,
118         AGGR_SOCKET,
119         AGGR_CORE,
120 };
121 
122 static int                      run_count                       =  1;
123 static bool                     no_inherit                      = false;
124 static bool                     scale                           =  true;
125 static enum aggr_mode           aggr_mode                       = AGGR_GLOBAL;
126 static volatile pid_t           child_pid                       = -1;
127 static bool                     null_run                        =  false;
128 static int                      detailed_run                    =  0;
129 static bool                     transaction_run;
130 static bool                     big_num                         =  true;
131 static int                      big_num_opt                     =  -1;
132 static const char               *csv_sep                        = NULL;
133 static bool                     csv_output                      = false;
134 static bool                     group                           = false;
135 static FILE                     *output                         = NULL;
136 static const char               *pre_cmd                        = NULL;
137 static const char               *post_cmd                       = NULL;
138 static bool                     sync_run                        = false;
139 static unsigned int             interval                        = 0;
140 static unsigned int             initial_delay                   = 0;
141 static unsigned int             unit_width                      = 4; /* strlen("unit") */
142 static bool                     forever                         = false;
143 static struct timespec          ref_time;
144 static struct cpu_map           *aggr_map;
145 static int                      (*aggr_get_id)(struct cpu_map *m, int cpu);
146 
147 static volatile int done = 0;
148 
149 struct perf_stat {
150         struct stats      res_stats[3];
151 };
152 
153 static inline void diff_timespec(struct timespec *r, struct timespec *a,
154                                  struct timespec *b)
155 {
156         r->tv_sec = a->tv_sec - b->tv_sec;
157         if (a->tv_nsec < b->tv_nsec) {
158                 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
159                 r->tv_sec--;
160         } else {
161                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
162         }
163 }
164 
165 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
166 {
167         return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
168 }
169 
170 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
171 {
172         return perf_evsel__cpus(evsel)->nr;
173 }
174 
175 static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
176 {
177         int i;
178         struct perf_stat *ps = evsel->priv;
179 
180         for (i = 0; i < 3; i++)
181                 init_stats(&ps->res_stats[i]);
182 }
183 
184 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
185 {
186         evsel->priv = zalloc(sizeof(struct perf_stat));
187         if (evsel == NULL)
188                 return -ENOMEM;
189         perf_evsel__reset_stat_priv(evsel);
190         return 0;
191 }
192 
193 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
194 {
195         zfree(&evsel->priv);
196 }
197 
198 static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
199 {
200         void *addr;
201         size_t sz;
202 
203         sz = sizeof(*evsel->counts) +
204              (perf_evsel__nr_cpus(evsel) * sizeof(struct perf_counts_values));
205 
206         addr = zalloc(sz);
207         if (!addr)
208                 return -ENOMEM;
209 
210         evsel->prev_raw_counts =  addr;
211 
212         return 0;
213 }
214 
215 static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
216 {
217         zfree(&evsel->prev_raw_counts);
218 }
219 
220 static void perf_evlist__free_stats(struct perf_evlist *evlist)
221 {
222         struct perf_evsel *evsel;
223 
224         evlist__for_each(evlist, evsel) {
225                 perf_evsel__free_stat_priv(evsel);
226                 perf_evsel__free_counts(evsel);
227                 perf_evsel__free_prev_raw_counts(evsel);
228         }
229 }
230 
231 static int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
232 {
233         struct perf_evsel *evsel;
234 
235         evlist__for_each(evlist, evsel) {
236                 if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
237                     perf_evsel__alloc_counts(evsel, perf_evsel__nr_cpus(evsel)) < 0 ||
238                     (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel) < 0))
239                         goto out_free;
240         }
241 
242         return 0;
243 
244 out_free:
245         perf_evlist__free_stats(evlist);
246         return -1;
247 }
248 
249 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
250 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
251 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
252 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
253 static struct stats runtime_branches_stats[MAX_NR_CPUS];
254 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
255 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
256 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
257 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
258 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
259 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
260 static struct stats runtime_cycles_in_tx_stats[MAX_NR_CPUS];
261 static struct stats walltime_nsecs_stats;
262 static struct stats runtime_transaction_stats[MAX_NR_CPUS];
263 static struct stats runtime_elision_stats[MAX_NR_CPUS];
264 
265 static void perf_stat__reset_stats(struct perf_evlist *evlist)
266 {
267         struct perf_evsel *evsel;
268 
269         evlist__for_each(evlist, evsel) {
270                 perf_evsel__reset_stat_priv(evsel);
271                 perf_evsel__reset_counts(evsel, perf_evsel__nr_cpus(evsel));
272         }
273 
274         memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
275         memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
276         memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
277         memset(runtime_stalled_cycles_back_stats, 0, sizeof(runtime_stalled_cycles_back_stats));
278         memset(runtime_branches_stats, 0, sizeof(runtime_branches_stats));
279         memset(runtime_cacherefs_stats, 0, sizeof(runtime_cacherefs_stats));
280         memset(runtime_l1_dcache_stats, 0, sizeof(runtime_l1_dcache_stats));
281         memset(runtime_l1_icache_stats, 0, sizeof(runtime_l1_icache_stats));
282         memset(runtime_ll_cache_stats, 0, sizeof(runtime_ll_cache_stats));
283         memset(runtime_itlb_cache_stats, 0, sizeof(runtime_itlb_cache_stats));
284         memset(runtime_dtlb_cache_stats, 0, sizeof(runtime_dtlb_cache_stats));
285         memset(runtime_cycles_in_tx_stats, 0,
286                         sizeof(runtime_cycles_in_tx_stats));
287         memset(runtime_transaction_stats, 0,
288                 sizeof(runtime_transaction_stats));
289         memset(runtime_elision_stats, 0, sizeof(runtime_elision_stats));
290         memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
291 }
292 
293 static int create_perf_stat_counter(struct perf_evsel *evsel)
294 {
295         struct perf_event_attr *attr = &evsel->attr;
296 
297         if (scale)
298                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
299                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
300 
301         attr->inherit = !no_inherit;
302 
303         if (target__has_cpu(&target))
304                 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
305 
306         if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) {
307                 attr->disabled = 1;
308                 if (!initial_delay)
309                         attr->enable_on_exec = 1;
310         }
311 
312         return perf_evsel__open_per_thread(evsel, evsel_list->threads);
313 }
314 
315 /*
316  * Does the counter have nsecs as a unit?
317  */
318 static inline int nsec_counter(struct perf_evsel *evsel)
319 {
320         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
321             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
322                 return 1;
323 
324         return 0;
325 }
326 
327 static struct perf_evsel *nth_evsel(int n)
328 {
329         static struct perf_evsel **array;
330         static int array_len;
331         struct perf_evsel *ev;
332         int j;
333 
334         /* Assumes this only called when evsel_list does not change anymore. */
335         if (!array) {
336                 evlist__for_each(evsel_list, ev)
337                         array_len++;
338                 array = malloc(array_len * sizeof(void *));
339                 if (!array)
340                         exit(ENOMEM);
341                 j = 0;
342                 evlist__for_each(evsel_list, ev)
343                         array[j++] = ev;
344         }
345         if (n < array_len)
346                 return array[n];
347         return NULL;
348 }
349 
350 /*
351  * Update various tracking values we maintain to print
352  * more semantic information such as miss/hit ratios,
353  * instruction rates, etc:
354  */
355 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
356 {
357         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
358                 update_stats(&runtime_nsecs_stats[0], count[0]);
359         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
360                 update_stats(&runtime_cycles_stats[0], count[0]);
361         else if (transaction_run &&
362                  perf_evsel__cmp(counter, nth_evsel(T_CYCLES_IN_TX)))
363                 update_stats(&runtime_cycles_in_tx_stats[0], count[0]);
364         else if (transaction_run &&
365                  perf_evsel__cmp(counter, nth_evsel(T_TRANSACTION_START)))
366                 update_stats(&runtime_transaction_stats[0], count[0]);
367         else if (transaction_run &&
368                  perf_evsel__cmp(counter, nth_evsel(T_ELISION_START)))
369                 update_stats(&runtime_elision_stats[0], count[0]);
370         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
371                 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
372         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
373                 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
374         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
375                 update_stats(&runtime_branches_stats[0], count[0]);
376         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
377                 update_stats(&runtime_cacherefs_stats[0], count[0]);
378         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
379                 update_stats(&runtime_l1_dcache_stats[0], count[0]);
380         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
381                 update_stats(&runtime_l1_icache_stats[0], count[0]);
382         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
383                 update_stats(&runtime_ll_cache_stats[0], count[0]);
384         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
385                 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
386         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
387                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
388 }
389 
390 /*
391  * Read out the results of a single counter:
392  * aggregate counts across CPUs in system-wide mode
393  */
394 static int read_counter_aggr(struct perf_evsel *counter)
395 {
396         struct perf_stat *ps = counter->priv;
397         u64 *count = counter->counts->aggr.values;
398         int i;
399 
400         if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
401                                thread_map__nr(evsel_list->threads), scale) < 0)
402                 return -1;
403 
404         for (i = 0; i < 3; i++)
405                 update_stats(&ps->res_stats[i], count[i]);
406 
407         if (verbose) {
408                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
409                         perf_evsel__name(counter), count[0], count[1], count[2]);
410         }
411 
412         /*
413          * Save the full runtime - to allow normalization during printout:
414          */
415         update_shadow_stats(counter, count);
416 
417         return 0;
418 }
419 
420 /*
421  * Read out the results of a single counter:
422  * do not aggregate counts across CPUs in system-wide mode
423  */
424 static int read_counter(struct perf_evsel *counter)
425 {
426         u64 *count;
427         int cpu;
428 
429         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
430                 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
431                         return -1;
432 
433                 count = counter->counts->cpu[cpu].values;
434 
435                 update_shadow_stats(counter, count);
436         }
437 
438         return 0;
439 }
440 
441 static void print_interval(void)
442 {
443         static int num_print_interval;
444         struct perf_evsel *counter;
445         struct perf_stat *ps;
446         struct timespec ts, rs;
447         char prefix[64];
448 
449         if (aggr_mode == AGGR_GLOBAL) {
450                 evlist__for_each(evsel_list, counter) {
451                         ps = counter->priv;
452                         memset(ps->res_stats, 0, sizeof(ps->res_stats));
453                         read_counter_aggr(counter);
454                 }
455         } else  {
456                 evlist__for_each(evsel_list, counter) {
457                         ps = counter->priv;
458                         memset(ps->res_stats, 0, sizeof(ps->res_stats));
459                         read_counter(counter);
460                 }
461         }
462 
463         clock_gettime(CLOCK_MONOTONIC, &ts);
464         diff_timespec(&rs, &ts, &ref_time);
465         sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
466 
467         if (num_print_interval == 0 && !csv_output) {
468                 switch (aggr_mode) {
469                 case AGGR_SOCKET:
470                         fprintf(output, "#           time socket cpus             counts %*s events\n", unit_width, "unit");
471                         break;
472                 case AGGR_CORE:
473                         fprintf(output, "#           time core         cpus             counts %*s events\n", unit_width, "unit");
474                         break;
475                 case AGGR_NONE:
476                         fprintf(output, "#           time CPU                counts %*s events\n", unit_width, "unit");
477                         break;
478                 case AGGR_GLOBAL:
479                 default:
480                         fprintf(output, "#           time             counts %*s events\n", unit_width, "unit");
481                 }
482         }
483 
484         if (++num_print_interval == 25)
485                 num_print_interval = 0;
486 
487         switch (aggr_mode) {
488         case AGGR_CORE:
489         case AGGR_SOCKET:
490                 print_aggr(prefix);
491                 break;
492         case AGGR_NONE:
493                 evlist__for_each(evsel_list, counter)
494                         print_counter(counter, prefix);
495                 break;
496         case AGGR_GLOBAL:
497         default:
498                 evlist__for_each(evsel_list, counter)
499                         print_counter_aggr(counter, prefix);
500         }
501 
502         fflush(output);
503 }
504 
505 static void handle_initial_delay(void)
506 {
507         struct perf_evsel *counter;
508 
509         if (initial_delay) {
510                 const int ncpus = cpu_map__nr(evsel_list->cpus),
511                         nthreads = thread_map__nr(evsel_list->threads);
512 
513                 usleep(initial_delay * 1000);
514                 evlist__for_each(evsel_list, counter)
515                         perf_evsel__enable(counter, ncpus, nthreads);
516         }
517 }
518 
519 static volatile int workload_exec_errno;
520 
521 /*
522  * perf_evlist__prepare_workload will send a SIGUSR1
523  * if the fork fails, since we asked by setting its
524  * want_signal to true.
525  */
526 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
527                                         void *ucontext __maybe_unused)
528 {
529         workload_exec_errno = info->si_value.sival_int;
530 }
531 
532 static int __run_perf_stat(int argc, const char **argv)
533 {
534         char msg[512];
535         unsigned long long t0, t1;
536         struct perf_evsel *counter;
537         struct timespec ts;
538         size_t l;
539         int status = 0;
540         const bool forks = (argc > 0);
541 
542         if (interval) {
543                 ts.tv_sec  = interval / 1000;
544                 ts.tv_nsec = (interval % 1000) * 1000000;
545         } else {
546                 ts.tv_sec  = 1;
547                 ts.tv_nsec = 0;
548         }
549 
550         if (forks) {
551                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, false,
552                                                   workload_exec_failed_signal) < 0) {
553                         perror("failed to prepare workload");
554                         return -1;
555                 }
556                 child_pid = evsel_list->workload.pid;
557         }
558 
559         if (group)
560                 perf_evlist__set_leader(evsel_list);
561 
562         evlist__for_each(evsel_list, counter) {
563                 if (create_perf_stat_counter(counter) < 0) {
564                         /*
565                          * PPC returns ENXIO for HW counters until 2.6.37
566                          * (behavior changed with commit b0a873e).
567                          */
568                         if (errno == EINVAL || errno == ENOSYS ||
569                             errno == ENOENT || errno == EOPNOTSUPP ||
570                             errno == ENXIO) {
571                                 if (verbose)
572                                         ui__warning("%s event is not supported by the kernel.\n",
573                                                     perf_evsel__name(counter));
574                                 counter->supported = false;
575                                 continue;
576                         }
577 
578                         perf_evsel__open_strerror(counter, &target,
579                                                   errno, msg, sizeof(msg));
580                         ui__error("%s\n", msg);
581 
582                         if (child_pid != -1)
583                                 kill(child_pid, SIGTERM);
584 
585                         return -1;
586                 }
587                 counter->supported = true;
588 
589                 l = strlen(counter->unit);
590                 if (l > unit_width)
591                         unit_width = l;
592         }
593 
594         if (perf_evlist__apply_filters(evsel_list)) {
595                 error("failed to set filter with %d (%s)\n", errno,
596                         strerror(errno));
597                 return -1;
598         }
599 
600         /*
601          * Enable counters and exec the command:
602          */
603         t0 = rdclock();
604         clock_gettime(CLOCK_MONOTONIC, &ref_time);
605 
606         if (forks) {
607                 perf_evlist__start_workload(evsel_list);
608                 handle_initial_delay();
609 
610                 if (interval) {
611                         while (!waitpid(child_pid, &status, WNOHANG)) {
612                                 nanosleep(&ts, NULL);
613                                 print_interval();
614                         }
615                 }
616                 wait(&status);
617 
618                 if (workload_exec_errno) {
619                         const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
620                         pr_err("Workload failed: %s\n", emsg);
621                         return -1;
622                 }
623 
624                 if (WIFSIGNALED(status))
625                         psignal(WTERMSIG(status), argv[0]);
626         } else {
627                 handle_initial_delay();
628                 while (!done) {
629                         nanosleep(&ts, NULL);
630                         if (interval)
631                                 print_interval();
632                 }
633         }
634 
635         t1 = rdclock();
636 
637         update_stats(&walltime_nsecs_stats, t1 - t0);
638 
639         if (aggr_mode == AGGR_GLOBAL) {
640                 evlist__for_each(evsel_list, counter) {
641                         read_counter_aggr(counter);
642                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
643                                              thread_map__nr(evsel_list->threads));
644                 }
645         } else {
646                 evlist__for_each(evsel_list, counter) {
647                         read_counter(counter);
648                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
649                 }
650         }
651 
652         return WEXITSTATUS(status);
653 }
654 
655 static int run_perf_stat(int argc, const char **argv)
656 {
657         int ret;
658 
659         if (pre_cmd) {
660                 ret = system(pre_cmd);
661                 if (ret)
662                         return ret;
663         }
664 
665         if (sync_run)
666                 sync();
667 
668         ret = __run_perf_stat(argc, argv);
669         if (ret)
670                 return ret;
671 
672         if (post_cmd) {
673                 ret = system(post_cmd);
674                 if (ret)
675                         return ret;
676         }
677 
678         return ret;
679 }
680 
681 static void print_noise_pct(double total, double avg)
682 {
683         double pct = rel_stddev_stats(total, avg);
684 
685         if (csv_output)
686                 fprintf(output, "%s%.2f%%", csv_sep, pct);
687         else if (pct)
688                 fprintf(output, "  ( +-%6.2f%% )", pct);
689 }
690 
691 static void print_noise(struct perf_evsel *evsel, double avg)
692 {
693         struct perf_stat *ps;
694 
695         if (run_count == 1)
696                 return;
697 
698         ps = evsel->priv;
699         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
700 }
701 
702 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
703 {
704         switch (aggr_mode) {
705         case AGGR_CORE:
706                 fprintf(output, "S%d-C%*d%s%*d%s",
707                         cpu_map__id_to_socket(id),
708                         csv_output ? 0 : -8,
709                         cpu_map__id_to_cpu(id),
710                         csv_sep,
711                         csv_output ? 0 : 4,
712                         nr,
713                         csv_sep);
714                 break;
715         case AGGR_SOCKET:
716                 fprintf(output, "S%*d%s%*d%s",
717                         csv_output ? 0 : -5,
718                         id,
719                         csv_sep,
720                         csv_output ? 0 : 4,
721                         nr,
722                         csv_sep);
723                         break;
724         case AGGR_NONE:
725                 fprintf(output, "CPU%*d%s",
726                         csv_output ? 0 : -4,
727                         perf_evsel__cpus(evsel)->map[id], csv_sep);
728                 break;
729         case AGGR_GLOBAL:
730         default:
731                 break;
732         }
733 }
734 
735 static void nsec_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
736 {
737         double msecs = avg / 1e6;
738         const char *fmt_v, *fmt_n;
739         char name[25];
740 
741         fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
742         fmt_n = csv_output ? "%s" : "%-25s";
743 
744         aggr_printout(evsel, cpu, nr);
745 
746         scnprintf(name, sizeof(name), "%s%s",
747                   perf_evsel__name(evsel), csv_output ? "" : " (msec)");
748 
749         fprintf(output, fmt_v, msecs, csv_sep);
750 
751         if (csv_output)
752                 fprintf(output, "%s%s", evsel->unit, csv_sep);
753         else
754                 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
755 
756         fprintf(output, fmt_n, name);
757 
758         if (evsel->cgrp)
759                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
760 
761         if (csv_output || interval)
762                 return;
763 
764         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
765                 fprintf(output, " # %8.3f CPUs utilized          ",
766                         avg / avg_stats(&walltime_nsecs_stats));
767         else
768                 fprintf(output, "                                   ");
769 }
770 
771 /* used for get_ratio_color() */
772 enum grc_type {
773         GRC_STALLED_CYCLES_FE,
774         GRC_STALLED_CYCLES_BE,
775         GRC_CACHE_MISSES,
776         GRC_MAX_NR
777 };
778 
779 static const char *get_ratio_color(enum grc_type type, double ratio)
780 {
781         static const double grc_table[GRC_MAX_NR][3] = {
782                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
783                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
784                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
785         };
786         const char *color = PERF_COLOR_NORMAL;
787 
788         if (ratio > grc_table[type][0])
789                 color = PERF_COLOR_RED;
790         else if (ratio > grc_table[type][1])
791                 color = PERF_COLOR_MAGENTA;
792         else if (ratio > grc_table[type][2])
793                 color = PERF_COLOR_YELLOW;
794 
795         return color;
796 }
797 
798 static void print_stalled_cycles_frontend(int cpu,
799                                           struct perf_evsel *evsel
800                                           __maybe_unused, double avg)
801 {
802         double total, ratio = 0.0;
803         const char *color;
804 
805         total = avg_stats(&runtime_cycles_stats[cpu]);
806 
807         if (total)
808                 ratio = avg / total * 100.0;
809 
810         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
811 
812         fprintf(output, " #  ");
813         color_fprintf(output, color, "%6.2f%%", ratio);
814         fprintf(output, " frontend cycles idle   ");
815 }
816 
817 static void print_stalled_cycles_backend(int cpu,
818                                          struct perf_evsel *evsel
819                                          __maybe_unused, double avg)
820 {
821         double total, ratio = 0.0;
822         const char *color;
823 
824         total = avg_stats(&runtime_cycles_stats[cpu]);
825 
826         if (total)
827                 ratio = avg / total * 100.0;
828 
829         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
830 
831         fprintf(output, " #  ");
832         color_fprintf(output, color, "%6.2f%%", ratio);
833         fprintf(output, " backend  cycles idle   ");
834 }
835 
836 static void print_branch_misses(int cpu,
837                                 struct perf_evsel *evsel __maybe_unused,
838                                 double avg)
839 {
840         double total, ratio = 0.0;
841         const char *color;
842 
843         total = avg_stats(&runtime_branches_stats[cpu]);
844 
845         if (total)
846                 ratio = avg / total * 100.0;
847 
848         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
849 
850         fprintf(output, " #  ");
851         color_fprintf(output, color, "%6.2f%%", ratio);
852         fprintf(output, " of all branches        ");
853 }
854 
855 static void print_l1_dcache_misses(int cpu,
856                                    struct perf_evsel *evsel __maybe_unused,
857                                    double avg)
858 {
859         double total, ratio = 0.0;
860         const char *color;
861 
862         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
863 
864         if (total)
865                 ratio = avg / total * 100.0;
866 
867         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
868 
869         fprintf(output, " #  ");
870         color_fprintf(output, color, "%6.2f%%", ratio);
871         fprintf(output, " of all L1-dcache hits  ");
872 }
873 
874 static void print_l1_icache_misses(int cpu,
875                                    struct perf_evsel *evsel __maybe_unused,
876                                    double avg)
877 {
878         double total, ratio = 0.0;
879         const char *color;
880 
881         total = avg_stats(&runtime_l1_icache_stats[cpu]);
882 
883         if (total)
884                 ratio = avg / total * 100.0;
885 
886         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
887 
888         fprintf(output, " #  ");
889         color_fprintf(output, color, "%6.2f%%", ratio);
890         fprintf(output, " of all L1-icache hits  ");
891 }
892 
893 static void print_dtlb_cache_misses(int cpu,
894                                     struct perf_evsel *evsel __maybe_unused,
895                                     double avg)
896 {
897         double total, ratio = 0.0;
898         const char *color;
899 
900         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
901 
902         if (total)
903                 ratio = avg / total * 100.0;
904 
905         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
906 
907         fprintf(output, " #  ");
908         color_fprintf(output, color, "%6.2f%%", ratio);
909         fprintf(output, " of all dTLB cache hits ");
910 }
911 
912 static void print_itlb_cache_misses(int cpu,
913                                     struct perf_evsel *evsel __maybe_unused,
914                                     double avg)
915 {
916         double total, ratio = 0.0;
917         const char *color;
918 
919         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
920 
921         if (total)
922                 ratio = avg / total * 100.0;
923 
924         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
925 
926         fprintf(output, " #  ");
927         color_fprintf(output, color, "%6.2f%%", ratio);
928         fprintf(output, " of all iTLB cache hits ");
929 }
930 
931 static void print_ll_cache_misses(int cpu,
932                                   struct perf_evsel *evsel __maybe_unused,
933                                   double avg)
934 {
935         double total, ratio = 0.0;
936         const char *color;
937 
938         total = avg_stats(&runtime_ll_cache_stats[cpu]);
939 
940         if (total)
941                 ratio = avg / total * 100.0;
942 
943         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
944 
945         fprintf(output, " #  ");
946         color_fprintf(output, color, "%6.2f%%", ratio);
947         fprintf(output, " of all LL-cache hits   ");
948 }
949 
950 static void abs_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
951 {
952         double total, ratio = 0.0, total2;
953         double sc =  evsel->scale;
954         const char *fmt;
955 
956         if (csv_output) {
957                 fmt = sc != 1.0 ?  "%.2f%s" : "%.0f%s";
958         } else {
959                 if (big_num)
960                         fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
961                 else
962                         fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s";
963         }
964 
965         aggr_printout(evsel, cpu, nr);
966 
967         if (aggr_mode == AGGR_GLOBAL)
968                 cpu = 0;
969 
970         fprintf(output, fmt, avg, csv_sep);
971 
972         if (evsel->unit)
973                 fprintf(output, "%-*s%s",
974                         csv_output ? 0 : unit_width,
975                         evsel->unit, csv_sep);
976 
977         fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
978 
979         if (evsel->cgrp)
980                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
981 
982         if (csv_output || interval)
983                 return;
984 
985         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
986                 total = avg_stats(&runtime_cycles_stats[cpu]);
987                 if (total) {
988                         ratio = avg / total;
989                         fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
990                 }
991                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
992                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
993 
994                 if (total && avg) {
995                         ratio = total / avg;
996                         fprintf(output, "\n");
997                         if (aggr_mode == AGGR_NONE)
998                                 fprintf(output, "        ");
999                         fprintf(output, "                                                  #   %5.2f  stalled cycles per insn", ratio);
1000                 }
1001 
1002         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
1003                         runtime_branches_stats[cpu].n != 0) {
1004                 print_branch_misses(cpu, evsel, avg);
1005         } else if (
1006                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1007                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
1008                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1009                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1010                         runtime_l1_dcache_stats[cpu].n != 0) {
1011                 print_l1_dcache_misses(cpu, evsel, avg);
1012         } else if (
1013                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1014                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
1015                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1016                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1017                         runtime_l1_icache_stats[cpu].n != 0) {
1018                 print_l1_icache_misses(cpu, evsel, avg);
1019         } else if (
1020                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1021                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
1022                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1023                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1024                         runtime_dtlb_cache_stats[cpu].n != 0) {
1025                 print_dtlb_cache_misses(cpu, evsel, avg);
1026         } else if (
1027                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1028                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
1029                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1030                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1031                         runtime_itlb_cache_stats[cpu].n != 0) {
1032                 print_itlb_cache_misses(cpu, evsel, avg);
1033         } else if (
1034                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1035                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
1036                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1037                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1038                         runtime_ll_cache_stats[cpu].n != 0) {
1039                 print_ll_cache_misses(cpu, evsel, avg);
1040         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
1041                         runtime_cacherefs_stats[cpu].n != 0) {
1042                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
1043 
1044                 if (total)
1045                         ratio = avg * 100 / total;
1046 
1047                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
1048 
1049         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
1050                 print_stalled_cycles_frontend(cpu, evsel, avg);
1051         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
1052                 print_stalled_cycles_backend(cpu, evsel, avg);
1053         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
1054                 total = avg_stats(&runtime_nsecs_stats[cpu]);
1055 
1056                 if (total) {
1057                         ratio = avg / total;
1058                         fprintf(output, " # %8.3f GHz                    ", ratio);
1059                 }
1060         } else if (transaction_run &&
1061                    perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX))) {
1062                 total = avg_stats(&runtime_cycles_stats[cpu]);
1063                 if (total)
1064                         fprintf(output,
1065                                 " #   %5.2f%% transactional cycles   ",
1066                                 100.0 * (avg / total));
1067         } else if (transaction_run &&
1068                    perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX_CP))) {
1069                 total = avg_stats(&runtime_cycles_stats[cpu]);
1070                 total2 = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1071                 if (total2 < avg)
1072                         total2 = avg;
1073                 if (total)
1074                         fprintf(output,
1075                                 " #   %5.2f%% aborted cycles         ",
1076                                 100.0 * ((total2-avg) / total));
1077         } else if (transaction_run &&
1078                    perf_evsel__cmp(evsel, nth_evsel(T_TRANSACTION_START)) &&
1079                    avg > 0 &&
1080                    runtime_cycles_in_tx_stats[cpu].n != 0) {
1081                 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1082 
1083                 if (total)
1084                         ratio = total / avg;
1085 
1086                 fprintf(output, " # %8.0f cycles / transaction   ", ratio);
1087         } else if (transaction_run &&
1088                    perf_evsel__cmp(evsel, nth_evsel(T_ELISION_START)) &&
1089                    avg > 0 &&
1090                    runtime_cycles_in_tx_stats[cpu].n != 0) {
1091                 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1092 
1093                 if (total)
1094                         ratio = total / avg;
1095 
1096                 fprintf(output, " # %8.0f cycles / elision       ", ratio);
1097         } else if (runtime_nsecs_stats[cpu].n != 0) {
1098                 char unit = 'M';
1099 
1100                 total = avg_stats(&runtime_nsecs_stats[cpu]);
1101 
1102                 if (total)
1103                         ratio = 1000.0 * avg / total;
1104                 if (ratio < 0.001) {
1105                         ratio *= 1000;
1106                         unit = 'K';
1107                 }
1108 
1109                 fprintf(output, " # %8.3f %c/sec                  ", ratio, unit);
1110         } else {
1111                 fprintf(output, "                                   ");
1112         }
1113 }
1114 
1115 static void print_aggr(char *prefix)
1116 {
1117         struct perf_evsel *counter;
1118         int cpu, s, s2, id, nr;
1119         double uval;
1120         u64 ena, run, val;
1121 
1122         if (!(aggr_map || aggr_get_id))
1123                 return;
1124 
1125         for (s = 0; s < aggr_map->nr; s++) {
1126                 id = aggr_map->map[s];
1127                 evlist__for_each(evsel_list, counter) {
1128                         val = ena = run = 0;
1129                         nr = 0;
1130                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1131                                 s2 = aggr_get_id(perf_evsel__cpus(counter), cpu);
1132                                 if (s2 != id)
1133                                         continue;
1134                                 val += counter->counts->cpu[cpu].val;
1135                                 ena += counter->counts->cpu[cpu].ena;
1136                                 run += counter->counts->cpu[cpu].run;
1137                                 nr++;
1138                         }
1139                         if (prefix)
1140                                 fprintf(output, "%s", prefix);
1141 
1142                         if (run == 0 || ena == 0) {
1143                                 aggr_printout(counter, id, nr);
1144 
1145                                 fprintf(output, "%*s%s",
1146                                         csv_output ? 0 : 18,
1147                                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1148                                         csv_sep);
1149 
1150                                 fprintf(output, "%-*s%s",
1151                                         csv_output ? 0 : unit_width,
1152                                         counter->unit, csv_sep);
1153 
1154                                 fprintf(output, "%*s",
1155                                         csv_output ? 0 : -25,
1156                                         perf_evsel__name(counter));
1157 
1158                                 if (counter->cgrp)
1159                                         fprintf(output, "%s%s",
1160                                                 csv_sep, counter->cgrp->name);
1161 
1162                                 fputc('\n', output);
1163                                 continue;
1164                         }
1165                         uval = val * counter->scale;
1166 
1167                         if (nsec_counter(counter))
1168                                 nsec_printout(id, nr, counter, uval);
1169                         else
1170                                 abs_printout(id, nr, counter, uval);
1171 
1172                         if (!csv_output) {
1173                                 print_noise(counter, 1.0);
1174 
1175                                 if (run != ena)
1176                                         fprintf(output, "  (%.2f%%)",
1177                                                 100.0 * run / ena);
1178                         }
1179                         fputc('\n', output);
1180                 }
1181         }
1182 }
1183 
1184 /*
1185  * Print out the results of a single counter:
1186  * aggregated counts in system-wide mode
1187  */
1188 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1189 {
1190         struct perf_stat *ps = counter->priv;
1191         double avg = avg_stats(&ps->res_stats[0]);
1192         int scaled = counter->counts->scaled;
1193         double uval;
1194 
1195         if (prefix)
1196                 fprintf(output, "%s", prefix);
1197 
1198         if (scaled == -1) {
1199                 fprintf(output, "%*s%s",
1200                         csv_output ? 0 : 18,
1201                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1202                         csv_sep);
1203                 fprintf(output, "%-*s%s",
1204                         csv_output ? 0 : unit_width,
1205                         counter->unit, csv_sep);
1206                 fprintf(output, "%*s",
1207                         csv_output ? 0 : -25,
1208                         perf_evsel__name(counter));
1209 
1210                 if (counter->cgrp)
1211                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
1212 
1213                 fputc('\n', output);
1214                 return;
1215         }
1216 
1217         uval = avg * counter->scale;
1218 
1219         if (nsec_counter(counter))
1220                 nsec_printout(-1, 0, counter, uval);
1221         else
1222                 abs_printout(-1, 0, counter, uval);
1223 
1224         print_noise(counter, avg);
1225 
1226         if (csv_output) {
1227                 fputc('\n', output);
1228                 return;
1229         }
1230 
1231         if (scaled) {
1232                 double avg_enabled, avg_running;
1233 
1234                 avg_enabled = avg_stats(&ps->res_stats[1]);
1235                 avg_running = avg_stats(&ps->res_stats[2]);
1236 
1237                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
1238         }
1239         fprintf(output, "\n");
1240 }
1241 
1242 /*
1243  * Print out the results of a single counter:
1244  * does not use aggregated count in system-wide
1245  */
1246 static void print_counter(struct perf_evsel *counter, char *prefix)
1247 {
1248         u64 ena, run, val;
1249         double uval;
1250         int cpu;
1251 
1252         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1253                 val = counter->counts->cpu[cpu].val;
1254                 ena = counter->counts->cpu[cpu].ena;
1255                 run = counter->counts->cpu[cpu].run;
1256 
1257                 if (prefix)
1258                         fprintf(output, "%s", prefix);
1259 
1260                 if (run == 0 || ena == 0) {
1261                         fprintf(output, "CPU%*d%s%*s%s",
1262                                 csv_output ? 0 : -4,
1263                                 perf_evsel__cpus(counter)->map[cpu], csv_sep,
1264                                 csv_output ? 0 : 18,
1265                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1266                                 csv_sep);
1267 
1268                                 fprintf(output, "%-*s%s",
1269                                         csv_output ? 0 : unit_width,
1270                                         counter->unit, csv_sep);
1271 
1272                                 fprintf(output, "%*s",
1273                                         csv_output ? 0 : -25,
1274                                         perf_evsel__name(counter));
1275 
1276                         if (counter->cgrp)
1277                                 fprintf(output, "%s%s",
1278                                         csv_sep, counter->cgrp->name);
1279 
1280                         fputc('\n', output);
1281                         continue;
1282                 }
1283 
1284                 uval = val * counter->scale;
1285 
1286                 if (nsec_counter(counter))
1287                         nsec_printout(cpu, 0, counter, uval);
1288                 else
1289                         abs_printout(cpu, 0, counter, uval);
1290 
1291                 if (!csv_output) {
1292                         print_noise(counter, 1.0);
1293 
1294                         if (run != ena)
1295                                 fprintf(output, "  (%.2f%%)",
1296                                         100.0 * run / ena);
1297                 }
1298                 fputc('\n', output);
1299         }
1300 }
1301 
1302 static void print_stat(int argc, const char **argv)
1303 {
1304         struct perf_evsel *counter;
1305         int i;
1306 
1307         fflush(stdout);
1308 
1309         if (!csv_output) {
1310                 fprintf(output, "\n");
1311                 fprintf(output, " Performance counter stats for ");
1312                 if (target.system_wide)
1313                         fprintf(output, "\'system wide");
1314                 else if (target.cpu_list)
1315                         fprintf(output, "\'CPU(s) %s", target.cpu_list);
1316                 else if (!target__has_task(&target)) {
1317                         fprintf(output, "\'%s", argv[0]);
1318                         for (i = 1; i < argc; i++)
1319                                 fprintf(output, " %s", argv[i]);
1320                 } else if (target.pid)
1321                         fprintf(output, "process id \'%s", target.pid);
1322                 else
1323                         fprintf(output, "thread id \'%s", target.tid);
1324 
1325                 fprintf(output, "\'");
1326                 if (run_count > 1)
1327                         fprintf(output, " (%d runs)", run_count);
1328                 fprintf(output, ":\n\n");
1329         }
1330 
1331         switch (aggr_mode) {
1332         case AGGR_CORE:
1333         case AGGR_SOCKET:
1334                 print_aggr(NULL);
1335                 break;
1336         case AGGR_GLOBAL:
1337                 evlist__for_each(evsel_list, counter)
1338                         print_counter_aggr(counter, NULL);
1339                 break;
1340         case AGGR_NONE:
1341                 evlist__for_each(evsel_list, counter)
1342                         print_counter(counter, NULL);
1343                 break;
1344         default:
1345                 break;
1346         }
1347 
1348         if (!csv_output) {
1349                 if (!null_run)
1350                         fprintf(output, "\n");
1351                 fprintf(output, " %17.9f seconds time elapsed",
1352                                 avg_stats(&walltime_nsecs_stats)/1e9);
1353                 if (run_count > 1) {
1354                         fprintf(output, "                                        ");
1355                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1356                                         avg_stats(&walltime_nsecs_stats));
1357                 }
1358                 fprintf(output, "\n\n");
1359         }
1360 }
1361 
1362 static volatile int signr = -1;
1363 
1364 static void skip_signal(int signo)
1365 {
1366         if ((child_pid == -1) || interval)
1367                 done = 1;
1368 
1369         signr = signo;
1370         /*
1371          * render child_pid harmless
1372          * won't send SIGTERM to a random
1373          * process in case of race condition
1374          * and fast PID recycling
1375          */
1376         child_pid = -1;
1377 }
1378 
1379 static void sig_atexit(void)
1380 {
1381         sigset_t set, oset;
1382 
1383         /*
1384          * avoid race condition with SIGCHLD handler
1385          * in skip_signal() which is modifying child_pid
1386          * goal is to avoid send SIGTERM to a random
1387          * process
1388          */
1389         sigemptyset(&set);
1390         sigaddset(&set, SIGCHLD);
1391         sigprocmask(SIG_BLOCK, &set, &oset);
1392 
1393         if (child_pid != -1)
1394                 kill(child_pid, SIGTERM);
1395 
1396         sigprocmask(SIG_SETMASK, &oset, NULL);
1397 
1398         if (signr == -1)
1399                 return;
1400 
1401         signal(signr, SIG_DFL);
1402         kill(getpid(), signr);
1403 }
1404 
1405 static int stat__set_big_num(const struct option *opt __maybe_unused,
1406                              const char *s __maybe_unused, int unset)
1407 {
1408         big_num_opt = unset ? 0 : 1;
1409         return 0;
1410 }
1411 
1412 static int perf_stat_init_aggr_mode(void)
1413 {
1414         switch (aggr_mode) {
1415         case AGGR_SOCKET:
1416                 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1417                         perror("cannot build socket map");
1418                         return -1;
1419                 }
1420                 aggr_get_id = cpu_map__get_socket;
1421                 break;
1422         case AGGR_CORE:
1423                 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1424                         perror("cannot build core map");
1425                         return -1;
1426                 }
1427                 aggr_get_id = cpu_map__get_core;
1428                 break;
1429         case AGGR_NONE:
1430         case AGGR_GLOBAL:
1431         default:
1432                 break;
1433         }
1434         return 0;
1435 }
1436 
1437 static int setup_events(const char * const *attrs, unsigned len)
1438 {
1439         unsigned i;
1440 
1441         for (i = 0; i < len; i++) {
1442                 if (parse_events(evsel_list, attrs[i]))
1443                         return -1;
1444         }
1445         return 0;
1446 }
1447 
1448 /*
1449  * Add default attributes, if there were no attributes specified or
1450  * if -d/--detailed, -d -d or -d -d -d is used:
1451  */
1452 static int add_default_attributes(void)
1453 {
1454         struct perf_event_attr default_attrs[] = {
1455 
1456   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1457   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1458   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1459   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1460 
1461   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1462   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1463   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1464   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1465   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1466   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1467 
1468 };
1469 
1470 /*
1471  * Detailed stats (-d), covering the L1 and last level data caches:
1472  */
1473         struct perf_event_attr detailed_attrs[] = {
1474 
1475   { .type = PERF_TYPE_HW_CACHE,
1476     .config =
1477          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1478         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1479         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1480 
1481   { .type = PERF_TYPE_HW_CACHE,
1482     .config =
1483          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1484         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1485         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1486 
1487   { .type = PERF_TYPE_HW_CACHE,
1488     .config =
1489          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1490         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1491         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1492 
1493   { .type = PERF_TYPE_HW_CACHE,
1494     .config =
1495          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1496         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1497         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1498 };
1499 
1500 /*
1501  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1502  */
1503         struct perf_event_attr very_detailed_attrs[] = {
1504 
1505   { .type = PERF_TYPE_HW_CACHE,
1506     .config =
1507          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1508         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1509         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1510 
1511   { .type = PERF_TYPE_HW_CACHE,
1512     .config =
1513          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1514         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1515         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1516 
1517   { .type = PERF_TYPE_HW_CACHE,
1518     .config =
1519          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1520         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1521         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1522 
1523   { .type = PERF_TYPE_HW_CACHE,
1524     .config =
1525          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1526         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1527         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1528 
1529   { .type = PERF_TYPE_HW_CACHE,
1530     .config =
1531          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1532         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1533         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1534 
1535   { .type = PERF_TYPE_HW_CACHE,
1536     .config =
1537          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1538         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1539         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1540 
1541 };
1542 
1543 /*
1544  * Very, very detailed stats (-d -d -d), adding prefetch events:
1545  */
1546         struct perf_event_attr very_very_detailed_attrs[] = {
1547 
1548   { .type = PERF_TYPE_HW_CACHE,
1549     .config =
1550          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1551         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1552         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1553 
1554   { .type = PERF_TYPE_HW_CACHE,
1555     .config =
1556          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1557         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1558         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1559 };
1560 
1561         /* Set attrs if no event is selected and !null_run: */
1562         if (null_run)
1563                 return 0;
1564 
1565         if (transaction_run) {
1566                 int err;
1567                 if (pmu_have_event("cpu", "cycles-ct") &&
1568                     pmu_have_event("cpu", "el-start"))
1569                         err = setup_events(transaction_attrs,
1570                                         ARRAY_SIZE(transaction_attrs));
1571                 else
1572                         err = setup_events(transaction_limited_attrs,
1573                                  ARRAY_SIZE(transaction_limited_attrs));
1574                 if (err < 0) {
1575                         fprintf(stderr, "Cannot set up transaction events\n");
1576                         return -1;
1577                 }
1578                 return 0;
1579         }
1580 
1581         if (!evsel_list->nr_entries) {
1582                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1583                         return -1;
1584         }
1585 
1586         /* Detailed events get appended to the event list: */
1587 
1588         if (detailed_run <  1)
1589                 return 0;
1590 
1591         /* Append detailed run extra attributes: */
1592         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1593                 return -1;
1594 
1595         if (detailed_run < 2)
1596                 return 0;
1597 
1598         /* Append very detailed run extra attributes: */
1599         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1600                 return -1;
1601 
1602         if (detailed_run < 3)
1603                 return 0;
1604 
1605         /* Append very, very detailed run extra attributes: */
1606         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1607 }
1608 
1609 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1610 {
1611         bool append_file = false;
1612         int output_fd = 0;
1613         const char *output_name = NULL;
1614         const struct option options[] = {
1615         OPT_BOOLEAN('T', "transaction", &transaction_run,
1616                     "hardware transaction statistics"),
1617         OPT_CALLBACK('e', "event", &evsel_list, "event",
1618                      "event selector. use 'perf list' to list available events",
1619                      parse_events_option),
1620         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1621                      "event filter", parse_filter),
1622         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1623                     "child tasks do not inherit counters"),
1624         OPT_STRING('p', "pid", &target.pid, "pid",
1625                    "stat events on existing process id"),
1626         OPT_STRING('t', "tid", &target.tid, "tid",
1627                    "stat events on existing thread id"),
1628         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1629                     "system-wide collection from all CPUs"),
1630         OPT_BOOLEAN('g', "group", &group,
1631                     "put the counters into a counter group"),
1632         OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1633         OPT_INCR('v', "verbose", &verbose,
1634                     "be more verbose (show counter open errors, etc)"),
1635         OPT_INTEGER('r', "repeat", &run_count,
1636                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1637         OPT_BOOLEAN('n', "null", &null_run,
1638                     "null run - dont start any counters"),
1639         OPT_INCR('d', "detailed", &detailed_run,
1640                     "detailed run - start a lot of events"),
1641         OPT_BOOLEAN('S', "sync", &sync_run,
1642                     "call sync() before starting a run"),
1643         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 
1644                            "print large numbers with thousands\' separators",
1645                            stat__set_big_num),
1646         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1647                     "list of cpus to monitor in system-wide"),
1648         OPT_SET_UINT('A', "no-aggr", &aggr_mode,
1649                     "disable CPU count aggregation", AGGR_NONE),
1650         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1651                    "print counts with custom separator"),
1652         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1653                      "monitor event in cgroup name only", parse_cgroups),
1654         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1655         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1656         OPT_INTEGER(0, "log-fd", &output_fd,
1657                     "log output to fd, instead of stderr"),
1658         OPT_STRING(0, "pre", &pre_cmd, "command",
1659                         "command to run prior to the measured command"),
1660         OPT_STRING(0, "post", &post_cmd, "command",
1661                         "command to run after to the measured command"),
1662         OPT_UINTEGER('I', "interval-print", &interval,
1663                     "print counts at regular interval in ms (>= 100)"),
1664         OPT_SET_UINT(0, "per-socket", &aggr_mode,
1665                      "aggregate counts per processor socket", AGGR_SOCKET),
1666         OPT_SET_UINT(0, "per-core", &aggr_mode,
1667                      "aggregate counts per physical processor core", AGGR_CORE),
1668         OPT_UINTEGER('D', "delay", &initial_delay,
1669                      "ms to wait before starting measurement after program start"),
1670         OPT_END()
1671         };
1672         const char * const stat_usage[] = {
1673                 "perf stat [<options>] [<command>]",
1674                 NULL
1675         };
1676         int status = -EINVAL, run_idx;
1677         const char *mode;
1678 
1679         setlocale(LC_ALL, "");
1680 
1681         evsel_list = perf_evlist__new();
1682         if (evsel_list == NULL)
1683                 return -ENOMEM;
1684 
1685         argc = parse_options(argc, argv, options, stat_usage,
1686                 PARSE_OPT_STOP_AT_NON_OPTION);
1687 
1688         output = stderr;
1689         if (output_name && strcmp(output_name, "-"))
1690                 output = NULL;
1691 
1692         if (output_name && output_fd) {
1693                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1694                 parse_options_usage(stat_usage, options, "o", 1);
1695                 parse_options_usage(NULL, options, "log-fd", 0);
1696                 goto out;
1697         }
1698 
1699         if (output_fd < 0) {
1700                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1701                 parse_options_usage(stat_usage, options, "log-fd", 0);
1702                 goto out;
1703         }
1704 
1705         if (!output) {
1706                 struct timespec tm;
1707                 mode = append_file ? "a" : "w";
1708 
1709                 output = fopen(output_name, mode);
1710                 if (!output) {
1711                         perror("failed to create output file");
1712                         return -1;
1713                 }
1714                 clock_gettime(CLOCK_REALTIME, &tm);
1715                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1716         } else if (output_fd > 0) {
1717                 mode = append_file ? "a" : "w";
1718                 output = fdopen(output_fd, mode);
1719                 if (!output) {
1720                         perror("Failed opening logfd");
1721                         return -errno;
1722                 }
1723         }
1724 
1725         if (csv_sep) {
1726                 csv_output = true;
1727                 if (!strcmp(csv_sep, "\\t"))
1728                         csv_sep = "\t";
1729         } else
1730                 csv_sep = DEFAULT_SEPARATOR;
1731 
1732         /*
1733          * let the spreadsheet do the pretty-printing
1734          */
1735         if (csv_output) {
1736                 /* User explicitly passed -B? */
1737                 if (big_num_opt == 1) {
1738                         fprintf(stderr, "-B option not supported with -x\n");
1739                         parse_options_usage(stat_usage, options, "B", 1);
1740                         parse_options_usage(NULL, options, "x", 1);
1741                         goto out;
1742                 } else /* Nope, so disable big number formatting */
1743                         big_num = false;
1744         } else if (big_num_opt == 0) /* User passed --no-big-num */
1745                 big_num = false;
1746 
1747         if (!argc && target__none(&target))
1748                 usage_with_options(stat_usage, options);
1749 
1750         if (run_count < 0) {
1751                 pr_err("Run count must be a positive number\n");
1752                 parse_options_usage(stat_usage, options, "r", 1);
1753                 goto out;
1754         } else if (run_count == 0) {
1755                 forever = true;
1756                 run_count = 1;
1757         }
1758 
1759         /* no_aggr, cgroup are for system-wide only */
1760         if ((aggr_mode != AGGR_GLOBAL || nr_cgroups) &&
1761             !target__has_cpu(&target)) {
1762                 fprintf(stderr, "both cgroup and no-aggregation "
1763                         "modes only available in system-wide mode\n");
1764 
1765                 parse_options_usage(stat_usage, options, "G", 1);
1766                 parse_options_usage(NULL, options, "A", 1);
1767                 parse_options_usage(NULL, options, "a", 1);
1768                 goto out;
1769         }
1770 
1771         if (add_default_attributes())
1772                 goto out;
1773 
1774         target__validate(&target);
1775 
1776         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1777                 if (target__has_task(&target)) {
1778                         pr_err("Problems finding threads of monitor\n");
1779                         parse_options_usage(stat_usage, options, "p", 1);
1780                         parse_options_usage(NULL, options, "t", 1);
1781                 } else if (target__has_cpu(&target)) {
1782                         perror("failed to parse CPUs map");
1783                         parse_options_usage(stat_usage, options, "C", 1);
1784                         parse_options_usage(NULL, options, "a", 1);
1785                 }
1786                 goto out;
1787         }
1788         if (interval && interval < 100) {
1789                 pr_err("print interval must be >= 100ms\n");
1790                 parse_options_usage(stat_usage, options, "I", 1);
1791                 goto out;
1792         }
1793 
1794         if (perf_evlist__alloc_stats(evsel_list, interval))
1795                 goto out;
1796 
1797         if (perf_stat_init_aggr_mode())
1798                 goto out;
1799 
1800         /*
1801          * We dont want to block the signals - that would cause
1802          * child tasks to inherit that and Ctrl-C would not work.
1803          * What we want is for Ctrl-C to work in the exec()-ed
1804          * task, but being ignored by perf stat itself:
1805          */
1806         atexit(sig_atexit);
1807         if (!forever)
1808                 signal(SIGINT,  skip_signal);
1809         signal(SIGCHLD, skip_signal);
1810         signal(SIGALRM, skip_signal);
1811         signal(SIGABRT, skip_signal);
1812 
1813         status = 0;
1814         for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
1815                 if (run_count != 1 && verbose)
1816                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1817                                 run_idx + 1);
1818 
1819                 status = run_perf_stat(argc, argv);
1820                 if (forever && status != -1) {
1821                         print_stat(argc, argv);
1822                         perf_stat__reset_stats(evsel_list);
1823                 }
1824         }
1825 
1826         if (!forever && status != -1 && !interval)
1827                 print_stat(argc, argv);
1828 
1829         perf_evlist__free_stats(evsel_list);
1830 out:
1831         perf_evlist__delete(evsel_list);
1832         return status;
1833 }
1834 

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