pwm-backlight: take over maintenance
[linux-3.10.git] / tools / perf / builtin-stat.c
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/event.h"
50 #include "util/evlist.h"
51 #include "util/evsel.h"
52 #include "util/debug.h"
53 #include "util/color.h"
54 #include "util/header.h"
55 #include "util/cpumap.h"
56 #include "util/thread.h"
57 #include "util/thread_map.h"
58
59 #include <sys/prctl.h>
60 #include <math.h>
61 #include <locale.h>
62
63 #define DEFAULT_SEPARATOR       " "
64 #define CNTR_NOT_SUPPORTED      "<not supported>"
65 #define CNTR_NOT_COUNTED        "<not counted>"
66
67 static struct perf_event_attr default_attrs[] = {
68
69   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
70   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
71   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
72   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
73
74   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
75   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
76   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
77   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
78   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
79   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
80
81 };
82
83 /*
84  * Detailed stats (-d), covering the L1 and last level data caches:
85  */
86 static struct perf_event_attr detailed_attrs[] = {
87
88   { .type = PERF_TYPE_HW_CACHE,
89     .config =
90          PERF_COUNT_HW_CACHE_L1D                <<  0  |
91         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
92         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
93
94   { .type = PERF_TYPE_HW_CACHE,
95     .config =
96          PERF_COUNT_HW_CACHE_L1D                <<  0  |
97         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
98         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
99
100   { .type = PERF_TYPE_HW_CACHE,
101     .config =
102          PERF_COUNT_HW_CACHE_LL                 <<  0  |
103         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
104         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
105
106   { .type = PERF_TYPE_HW_CACHE,
107     .config =
108          PERF_COUNT_HW_CACHE_LL                 <<  0  |
109         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
110         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
111 };
112
113 /*
114  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
115  */
116 static struct perf_event_attr very_detailed_attrs[] = {
117
118   { .type = PERF_TYPE_HW_CACHE,
119     .config =
120          PERF_COUNT_HW_CACHE_L1I                <<  0  |
121         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
122         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
123
124   { .type = PERF_TYPE_HW_CACHE,
125     .config =
126          PERF_COUNT_HW_CACHE_L1I                <<  0  |
127         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
128         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
129
130   { .type = PERF_TYPE_HW_CACHE,
131     .config =
132          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
133         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
134         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
135
136   { .type = PERF_TYPE_HW_CACHE,
137     .config =
138          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
139         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
140         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
141
142   { .type = PERF_TYPE_HW_CACHE,
143     .config =
144          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
145         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
146         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
147
148   { .type = PERF_TYPE_HW_CACHE,
149     .config =
150          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
151         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
152         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
153
154 };
155
156 /*
157  * Very, very detailed stats (-d -d -d), adding prefetch events:
158  */
159 static struct perf_event_attr very_very_detailed_attrs[] = {
160
161   { .type = PERF_TYPE_HW_CACHE,
162     .config =
163          PERF_COUNT_HW_CACHE_L1D                <<  0  |
164         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
165         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
166
167   { .type = PERF_TYPE_HW_CACHE,
168     .config =
169          PERF_COUNT_HW_CACHE_L1D                <<  0  |
170         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
171         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
172 };
173
174
175
176 static struct perf_evlist       *evsel_list;
177
178 static struct perf_target       target = {
179         .uid    = UINT_MAX,
180 };
181
182 static int                      run_idx                         =  0;
183 static int                      run_count                       =  1;
184 static bool                     no_inherit                      = false;
185 static bool                     scale                           =  true;
186 static bool                     no_aggr                         = false;
187 static pid_t                    child_pid                       = -1;
188 static bool                     null_run                        =  false;
189 static int                      detailed_run                    =  0;
190 static bool                     sync_run                        =  false;
191 static bool                     big_num                         =  true;
192 static int                      big_num_opt                     =  -1;
193 static const char               *csv_sep                        = NULL;
194 static bool                     csv_output                      = false;
195 static bool                     group                           = false;
196 static const char               *output_name                    = NULL;
197 static FILE                     *output                         = NULL;
198 static int                      output_fd;
199
200 static volatile int done = 0;
201
202 struct stats
203 {
204         double n, mean, M2;
205 };
206
207 struct perf_stat {
208         struct stats      res_stats[3];
209 };
210
211 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
212 {
213         evsel->priv = zalloc(sizeof(struct perf_stat));
214         return evsel->priv == NULL ? -ENOMEM : 0;
215 }
216
217 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
218 {
219         free(evsel->priv);
220         evsel->priv = NULL;
221 }
222
223 static void update_stats(struct stats *stats, u64 val)
224 {
225         double delta;
226
227         stats->n++;
228         delta = val - stats->mean;
229         stats->mean += delta / stats->n;
230         stats->M2 += delta*(val - stats->mean);
231 }
232
233 static double avg_stats(struct stats *stats)
234 {
235         return stats->mean;
236 }
237
238 /*
239  * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
240  *
241  *       (\Sum n_i^2) - ((\Sum n_i)^2)/n
242  * s^2 = -------------------------------
243  *                  n - 1
244  *
245  * http://en.wikipedia.org/wiki/Stddev
246  *
247  * The std dev of the mean is related to the std dev by:
248  *
249  *             s
250  * s_mean = -------
251  *          sqrt(n)
252  *
253  */
254 static double stddev_stats(struct stats *stats)
255 {
256         double variance, variance_mean;
257
258         if (!stats->n)
259                 return 0.0;
260
261         variance = stats->M2 / (stats->n - 1);
262         variance_mean = variance / stats->n;
263
264         return sqrt(variance_mean);
265 }
266
267 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
268 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
269 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
270 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
271 static struct stats runtime_branches_stats[MAX_NR_CPUS];
272 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
273 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
274 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
275 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
276 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
277 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
278 static struct stats walltime_nsecs_stats;
279
280 static int create_perf_stat_counter(struct perf_evsel *evsel,
281                                     struct perf_evsel *first)
282 {
283         struct perf_event_attr *attr = &evsel->attr;
284         struct xyarray *group_fd = NULL;
285         bool exclude_guest_missing = false;
286         int ret;
287
288         if (group && evsel != first)
289                 group_fd = first->fd;
290
291         if (scale)
292                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
293                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
294
295         attr->inherit = !no_inherit;
296
297 retry:
298         if (exclude_guest_missing)
299                 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
300
301         if (perf_target__has_cpu(&target)) {
302                 ret = perf_evsel__open_per_cpu(evsel, evsel_list->cpus,
303                                                group, group_fd);
304                 if (ret)
305                         goto check_ret;
306                 return 0;
307         }
308
309         if (!perf_target__has_task(&target) && (!group || evsel == first)) {
310                 attr->disabled = 1;
311                 attr->enable_on_exec = 1;
312         }
313
314         ret = perf_evsel__open_per_thread(evsel, evsel_list->threads,
315                                           group, group_fd);
316         if (!ret)
317                 return 0;
318         /* fall through */
319 check_ret:
320         if (ret && errno == EINVAL) {
321                 if (!exclude_guest_missing &&
322                     (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
323                         pr_debug("Old kernel, cannot exclude "
324                                  "guest or host samples.\n");
325                         exclude_guest_missing = true;
326                         goto retry;
327                 }
328         }
329         return ret;
330 }
331
332 /*
333  * Does the counter have nsecs as a unit?
334  */
335 static inline int nsec_counter(struct perf_evsel *evsel)
336 {
337         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
338             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
339                 return 1;
340
341         return 0;
342 }
343
344 /*
345  * Update various tracking values we maintain to print
346  * more semantic information such as miss/hit ratios,
347  * instruction rates, etc:
348  */
349 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
350 {
351         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
352                 update_stats(&runtime_nsecs_stats[0], count[0]);
353         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
354                 update_stats(&runtime_cycles_stats[0], count[0]);
355         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
356                 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
357         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
358                 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
359         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
360                 update_stats(&runtime_branches_stats[0], count[0]);
361         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
362                 update_stats(&runtime_cacherefs_stats[0], count[0]);
363         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
364                 update_stats(&runtime_l1_dcache_stats[0], count[0]);
365         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
366                 update_stats(&runtime_l1_icache_stats[0], count[0]);
367         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
368                 update_stats(&runtime_ll_cache_stats[0], count[0]);
369         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
370                 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
371         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
372                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
373 }
374
375 /*
376  * Read out the results of a single counter:
377  * aggregate counts across CPUs in system-wide mode
378  */
379 static int read_counter_aggr(struct perf_evsel *counter)
380 {
381         struct perf_stat *ps = counter->priv;
382         u64 *count = counter->counts->aggr.values;
383         int i;
384
385         if (__perf_evsel__read(counter, evsel_list->cpus->nr,
386                                evsel_list->threads->nr, scale) < 0)
387                 return -1;
388
389         for (i = 0; i < 3; i++)
390                 update_stats(&ps->res_stats[i], count[i]);
391
392         if (verbose) {
393                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
394                         perf_evsel__name(counter), count[0], count[1], count[2]);
395         }
396
397         /*
398          * Save the full runtime - to allow normalization during printout:
399          */
400         update_shadow_stats(counter, count);
401
402         return 0;
403 }
404
405 /*
406  * Read out the results of a single counter:
407  * do not aggregate counts across CPUs in system-wide mode
408  */
409 static int read_counter(struct perf_evsel *counter)
410 {
411         u64 *count;
412         int cpu;
413
414         for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
415                 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
416                         return -1;
417
418                 count = counter->counts->cpu[cpu].values;
419
420                 update_shadow_stats(counter, count);
421         }
422
423         return 0;
424 }
425
426 static int run_perf_stat(int argc __used, const char **argv)
427 {
428         unsigned long long t0, t1;
429         struct perf_evsel *counter, *first;
430         int status = 0;
431         int child_ready_pipe[2], go_pipe[2];
432         const bool forks = (argc > 0);
433         char buf;
434
435         if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
436                 perror("failed to create pipes");
437                 exit(1);
438         }
439
440         if (forks) {
441                 if ((child_pid = fork()) < 0)
442                         perror("failed to fork");
443
444                 if (!child_pid) {
445                         close(child_ready_pipe[0]);
446                         close(go_pipe[1]);
447                         fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
448
449                         /*
450                          * Do a dummy execvp to get the PLT entry resolved,
451                          * so we avoid the resolver overhead on the real
452                          * execvp call.
453                          */
454                         execvp("", (char **)argv);
455
456                         /*
457                          * Tell the parent we're ready to go
458                          */
459                         close(child_ready_pipe[1]);
460
461                         /*
462                          * Wait until the parent tells us to go.
463                          */
464                         if (read(go_pipe[0], &buf, 1) == -1)
465                                 perror("unable to read pipe");
466
467                         execvp(argv[0], (char **)argv);
468
469                         perror(argv[0]);
470                         exit(-1);
471                 }
472
473                 if (perf_target__none(&target))
474                         evsel_list->threads->map[0] = child_pid;
475
476                 /*
477                  * Wait for the child to be ready to exec.
478                  */
479                 close(child_ready_pipe[1]);
480                 close(go_pipe[0]);
481                 if (read(child_ready_pipe[0], &buf, 1) == -1)
482                         perror("unable to read pipe");
483                 close(child_ready_pipe[0]);
484         }
485
486         first = list_entry(evsel_list->entries.next, struct perf_evsel, node);
487
488         list_for_each_entry(counter, &evsel_list->entries, node) {
489                 if (create_perf_stat_counter(counter, first) < 0) {
490                         /*
491                          * PPC returns ENXIO for HW counters until 2.6.37
492                          * (behavior changed with commit b0a873e).
493                          */
494                         if (errno == EINVAL || errno == ENOSYS ||
495                             errno == ENOENT || errno == EOPNOTSUPP ||
496                             errno == ENXIO) {
497                                 if (verbose)
498                                         ui__warning("%s event is not supported by the kernel.\n",
499                                                     perf_evsel__name(counter));
500                                 counter->supported = false;
501                                 continue;
502                         }
503
504                         if (errno == EPERM || errno == EACCES) {
505                                 error("You may not have permission to collect %sstats.\n"
506                                       "\t Consider tweaking"
507                                       " /proc/sys/kernel/perf_event_paranoid or running as root.",
508                                       target.system_wide ? "system-wide " : "");
509                         } else {
510                                 error("open_counter returned with %d (%s). "
511                                       "/bin/dmesg may provide additional information.\n",
512                                        errno, strerror(errno));
513                         }
514                         if (child_pid != -1)
515                                 kill(child_pid, SIGTERM);
516                         die("Not all events could be opened.\n");
517                         return -1;
518                 }
519                 counter->supported = true;
520         }
521
522         if (perf_evlist__set_filters(evsel_list)) {
523                 error("failed to set filter with %d (%s)\n", errno,
524                         strerror(errno));
525                 return -1;
526         }
527
528         /*
529          * Enable counters and exec the command:
530          */
531         t0 = rdclock();
532
533         if (forks) {
534                 close(go_pipe[1]);
535                 wait(&status);
536                 if (WIFSIGNALED(status))
537                         psignal(WTERMSIG(status), argv[0]);
538         } else {
539                 while(!done) sleep(1);
540         }
541
542         t1 = rdclock();
543
544         update_stats(&walltime_nsecs_stats, t1 - t0);
545
546         if (no_aggr) {
547                 list_for_each_entry(counter, &evsel_list->entries, node) {
548                         read_counter(counter);
549                         perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
550                 }
551         } else {
552                 list_for_each_entry(counter, &evsel_list->entries, node) {
553                         read_counter_aggr(counter);
554                         perf_evsel__close_fd(counter, evsel_list->cpus->nr,
555                                              evsel_list->threads->nr);
556                 }
557         }
558
559         return WEXITSTATUS(status);
560 }
561
562 static void print_noise_pct(double total, double avg)
563 {
564         double pct = 0.0;
565
566         if (avg)
567                 pct = 100.0*total/avg;
568
569         if (csv_output)
570                 fprintf(output, "%s%.2f%%", csv_sep, pct);
571         else if (pct)
572                 fprintf(output, "  ( +-%6.2f%% )", pct);
573 }
574
575 static void print_noise(struct perf_evsel *evsel, double avg)
576 {
577         struct perf_stat *ps;
578
579         if (run_count == 1)
580                 return;
581
582         ps = evsel->priv;
583         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
584 }
585
586 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
587 {
588         double msecs = avg / 1e6;
589         char cpustr[16] = { '\0', };
590         const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
591
592         if (no_aggr)
593                 sprintf(cpustr, "CPU%*d%s",
594                         csv_output ? 0 : -4,
595                         evsel_list->cpus->map[cpu], csv_sep);
596
597         fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
598
599         if (evsel->cgrp)
600                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
601
602         if (csv_output)
603                 return;
604
605         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
606                 fprintf(output, " # %8.3f CPUs utilized          ",
607                         avg / avg_stats(&walltime_nsecs_stats));
608         else
609                 fprintf(output, "                                   ");
610 }
611
612 /* used for get_ratio_color() */
613 enum grc_type {
614         GRC_STALLED_CYCLES_FE,
615         GRC_STALLED_CYCLES_BE,
616         GRC_CACHE_MISSES,
617         GRC_MAX_NR
618 };
619
620 static const char *get_ratio_color(enum grc_type type, double ratio)
621 {
622         static const double grc_table[GRC_MAX_NR][3] = {
623                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
624                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
625                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
626         };
627         const char *color = PERF_COLOR_NORMAL;
628
629         if (ratio > grc_table[type][0])
630                 color = PERF_COLOR_RED;
631         else if (ratio > grc_table[type][1])
632                 color = PERF_COLOR_MAGENTA;
633         else if (ratio > grc_table[type][2])
634                 color = PERF_COLOR_YELLOW;
635
636         return color;
637 }
638
639 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
640 {
641         double total, ratio = 0.0;
642         const char *color;
643
644         total = avg_stats(&runtime_cycles_stats[cpu]);
645
646         if (total)
647                 ratio = avg / total * 100.0;
648
649         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
650
651         fprintf(output, " #  ");
652         color_fprintf(output, color, "%6.2f%%", ratio);
653         fprintf(output, " frontend cycles idle   ");
654 }
655
656 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
657 {
658         double total, ratio = 0.0;
659         const char *color;
660
661         total = avg_stats(&runtime_cycles_stats[cpu]);
662
663         if (total)
664                 ratio = avg / total * 100.0;
665
666         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
667
668         fprintf(output, " #  ");
669         color_fprintf(output, color, "%6.2f%%", ratio);
670         fprintf(output, " backend  cycles idle   ");
671 }
672
673 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
674 {
675         double total, ratio = 0.0;
676         const char *color;
677
678         total = avg_stats(&runtime_branches_stats[cpu]);
679
680         if (total)
681                 ratio = avg / total * 100.0;
682
683         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
684
685         fprintf(output, " #  ");
686         color_fprintf(output, color, "%6.2f%%", ratio);
687         fprintf(output, " of all branches        ");
688 }
689
690 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
691 {
692         double total, ratio = 0.0;
693         const char *color;
694
695         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
696
697         if (total)
698                 ratio = avg / total * 100.0;
699
700         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
701
702         fprintf(output, " #  ");
703         color_fprintf(output, color, "%6.2f%%", ratio);
704         fprintf(output, " of all L1-dcache hits  ");
705 }
706
707 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
708 {
709         double total, ratio = 0.0;
710         const char *color;
711
712         total = avg_stats(&runtime_l1_icache_stats[cpu]);
713
714         if (total)
715                 ratio = avg / total * 100.0;
716
717         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
718
719         fprintf(output, " #  ");
720         color_fprintf(output, color, "%6.2f%%", ratio);
721         fprintf(output, " of all L1-icache hits  ");
722 }
723
724 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
725 {
726         double total, ratio = 0.0;
727         const char *color;
728
729         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
730
731         if (total)
732                 ratio = avg / total * 100.0;
733
734         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
735
736         fprintf(output, " #  ");
737         color_fprintf(output, color, "%6.2f%%", ratio);
738         fprintf(output, " of all dTLB cache hits ");
739 }
740
741 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
742 {
743         double total, ratio = 0.0;
744         const char *color;
745
746         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
747
748         if (total)
749                 ratio = avg / total * 100.0;
750
751         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
752
753         fprintf(output, " #  ");
754         color_fprintf(output, color, "%6.2f%%", ratio);
755         fprintf(output, " of all iTLB cache hits ");
756 }
757
758 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
759 {
760         double total, ratio = 0.0;
761         const char *color;
762
763         total = avg_stats(&runtime_ll_cache_stats[cpu]);
764
765         if (total)
766                 ratio = avg / total * 100.0;
767
768         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
769
770         fprintf(output, " #  ");
771         color_fprintf(output, color, "%6.2f%%", ratio);
772         fprintf(output, " of all LL-cache hits   ");
773 }
774
775 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
776 {
777         double total, ratio = 0.0;
778         char cpustr[16] = { '\0', };
779         const char *fmt;
780
781         if (csv_output)
782                 fmt = "%s%.0f%s%s";
783         else if (big_num)
784                 fmt = "%s%'18.0f%s%-25s";
785         else
786                 fmt = "%s%18.0f%s%-25s";
787
788         if (no_aggr)
789                 sprintf(cpustr, "CPU%*d%s",
790                         csv_output ? 0 : -4,
791                         evsel_list->cpus->map[cpu], csv_sep);
792         else
793                 cpu = 0;
794
795         fprintf(output, fmt, cpustr, avg, csv_sep, perf_evsel__name(evsel));
796
797         if (evsel->cgrp)
798                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
799
800         if (csv_output)
801                 return;
802
803         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
804                 total = avg_stats(&runtime_cycles_stats[cpu]);
805
806                 if (total)
807                         ratio = avg / total;
808
809                 fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
810
811                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
812                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
813
814                 if (total && avg) {
815                         ratio = total / avg;
816                         fprintf(output, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
817                 }
818
819         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
820                         runtime_branches_stats[cpu].n != 0) {
821                 print_branch_misses(cpu, evsel, avg);
822         } else if (
823                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
824                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
825                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
826                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
827                         runtime_l1_dcache_stats[cpu].n != 0) {
828                 print_l1_dcache_misses(cpu, evsel, avg);
829         } else if (
830                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
831                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
832                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
833                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
834                         runtime_l1_icache_stats[cpu].n != 0) {
835                 print_l1_icache_misses(cpu, evsel, avg);
836         } else if (
837                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
838                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
839                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
840                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
841                         runtime_dtlb_cache_stats[cpu].n != 0) {
842                 print_dtlb_cache_misses(cpu, evsel, avg);
843         } else if (
844                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
845                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
846                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
847                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
848                         runtime_itlb_cache_stats[cpu].n != 0) {
849                 print_itlb_cache_misses(cpu, evsel, avg);
850         } else if (
851                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
852                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
853                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
854                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
855                         runtime_ll_cache_stats[cpu].n != 0) {
856                 print_ll_cache_misses(cpu, evsel, avg);
857         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
858                         runtime_cacherefs_stats[cpu].n != 0) {
859                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
860
861                 if (total)
862                         ratio = avg * 100 / total;
863
864                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
865
866         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
867                 print_stalled_cycles_frontend(cpu, evsel, avg);
868         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
869                 print_stalled_cycles_backend(cpu, evsel, avg);
870         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
871                 total = avg_stats(&runtime_nsecs_stats[cpu]);
872
873                 if (total)
874                         ratio = 1.0 * avg / total;
875
876                 fprintf(output, " # %8.3f GHz                    ", ratio);
877         } else if (runtime_nsecs_stats[cpu].n != 0) {
878                 char unit = 'M';
879
880                 total = avg_stats(&runtime_nsecs_stats[cpu]);
881
882                 if (total)
883                         ratio = 1000.0 * avg / total;
884                 if (ratio < 0.001) {
885                         ratio *= 1000;
886                         unit = 'K';
887                 }
888
889                 fprintf(output, " # %8.3f %c/sec                  ", ratio, unit);
890         } else {
891                 fprintf(output, "                                   ");
892         }
893 }
894
895 /*
896  * Print out the results of a single counter:
897  * aggregated counts in system-wide mode
898  */
899 static void print_counter_aggr(struct perf_evsel *counter)
900 {
901         struct perf_stat *ps = counter->priv;
902         double avg = avg_stats(&ps->res_stats[0]);
903         int scaled = counter->counts->scaled;
904
905         if (scaled == -1) {
906                 fprintf(output, "%*s%s%*s",
907                         csv_output ? 0 : 18,
908                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
909                         csv_sep,
910                         csv_output ? 0 : -24,
911                         perf_evsel__name(counter));
912
913                 if (counter->cgrp)
914                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
915
916                 fputc('\n', output);
917                 return;
918         }
919
920         if (nsec_counter(counter))
921                 nsec_printout(-1, counter, avg);
922         else
923                 abs_printout(-1, counter, avg);
924
925         print_noise(counter, avg);
926
927         if (csv_output) {
928                 fputc('\n', output);
929                 return;
930         }
931
932         if (scaled) {
933                 double avg_enabled, avg_running;
934
935                 avg_enabled = avg_stats(&ps->res_stats[1]);
936                 avg_running = avg_stats(&ps->res_stats[2]);
937
938                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
939         }
940         fprintf(output, "\n");
941 }
942
943 /*
944  * Print out the results of a single counter:
945  * does not use aggregated count in system-wide
946  */
947 static void print_counter(struct perf_evsel *counter)
948 {
949         u64 ena, run, val;
950         int cpu;
951
952         for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
953                 val = counter->counts->cpu[cpu].val;
954                 ena = counter->counts->cpu[cpu].ena;
955                 run = counter->counts->cpu[cpu].run;
956                 if (run == 0 || ena == 0) {
957                         fprintf(output, "CPU%*d%s%*s%s%*s",
958                                 csv_output ? 0 : -4,
959                                 evsel_list->cpus->map[cpu], csv_sep,
960                                 csv_output ? 0 : 18,
961                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
962                                 csv_sep,
963                                 csv_output ? 0 : -24,
964                                 perf_evsel__name(counter));
965
966                         if (counter->cgrp)
967                                 fprintf(output, "%s%s",
968                                         csv_sep, counter->cgrp->name);
969
970                         fputc('\n', output);
971                         continue;
972                 }
973
974                 if (nsec_counter(counter))
975                         nsec_printout(cpu, counter, val);
976                 else
977                         abs_printout(cpu, counter, val);
978
979                 if (!csv_output) {
980                         print_noise(counter, 1.0);
981
982                         if (run != ena)
983                                 fprintf(output, "  (%.2f%%)",
984                                         100.0 * run / ena);
985                 }
986                 fputc('\n', output);
987         }
988 }
989
990 static void print_stat(int argc, const char **argv)
991 {
992         struct perf_evsel *counter;
993         int i;
994
995         fflush(stdout);
996
997         if (!csv_output) {
998                 fprintf(output, "\n");
999                 fprintf(output, " Performance counter stats for ");
1000                 if (!perf_target__has_task(&target)) {
1001                         fprintf(output, "\'%s", argv[0]);
1002                         for (i = 1; i < argc; i++)
1003                                 fprintf(output, " %s", argv[i]);
1004                 } else if (target.pid)
1005                         fprintf(output, "process id \'%s", target.pid);
1006                 else
1007                         fprintf(output, "thread id \'%s", target.tid);
1008
1009                 fprintf(output, "\'");
1010                 if (run_count > 1)
1011                         fprintf(output, " (%d runs)", run_count);
1012                 fprintf(output, ":\n\n");
1013         }
1014
1015         if (no_aggr) {
1016                 list_for_each_entry(counter, &evsel_list->entries, node)
1017                         print_counter(counter);
1018         } else {
1019                 list_for_each_entry(counter, &evsel_list->entries, node)
1020                         print_counter_aggr(counter);
1021         }
1022
1023         if (!csv_output) {
1024                 if (!null_run)
1025                         fprintf(output, "\n");
1026                 fprintf(output, " %17.9f seconds time elapsed",
1027                                 avg_stats(&walltime_nsecs_stats)/1e9);
1028                 if (run_count > 1) {
1029                         fprintf(output, "                                        ");
1030                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1031                                         avg_stats(&walltime_nsecs_stats));
1032                 }
1033                 fprintf(output, "\n\n");
1034         }
1035 }
1036
1037 static volatile int signr = -1;
1038
1039 static void skip_signal(int signo)
1040 {
1041         if(child_pid == -1)
1042                 done = 1;
1043
1044         signr = signo;
1045 }
1046
1047 static void sig_atexit(void)
1048 {
1049         if (child_pid != -1)
1050                 kill(child_pid, SIGTERM);
1051
1052         if (signr == -1)
1053                 return;
1054
1055         signal(signr, SIG_DFL);
1056         kill(getpid(), signr);
1057 }
1058
1059 static const char * const stat_usage[] = {
1060         "perf stat [<options>] [<command>]",
1061         NULL
1062 };
1063
1064 static int stat__set_big_num(const struct option *opt __used,
1065                              const char *s __used, int unset)
1066 {
1067         big_num_opt = unset ? 0 : 1;
1068         return 0;
1069 }
1070
1071 static bool append_file;
1072
1073 static const struct option options[] = {
1074         OPT_CALLBACK('e', "event", &evsel_list, "event",
1075                      "event selector. use 'perf list' to list available events",
1076                      parse_events_option),
1077         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1078                      "event filter", parse_filter),
1079         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1080                     "child tasks do not inherit counters"),
1081         OPT_STRING('p', "pid", &target.pid, "pid",
1082                    "stat events on existing process id"),
1083         OPT_STRING('t', "tid", &target.tid, "tid",
1084                    "stat events on existing thread id"),
1085         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1086                     "system-wide collection from all CPUs"),
1087         OPT_BOOLEAN('g', "group", &group,
1088                     "put the counters into a counter group"),
1089         OPT_BOOLEAN('c', "scale", &scale,
1090                     "scale/normalize counters"),
1091         OPT_INCR('v', "verbose", &verbose,
1092                     "be more verbose (show counter open errors, etc)"),
1093         OPT_INTEGER('r', "repeat", &run_count,
1094                     "repeat command and print average + stddev (max: 100)"),
1095         OPT_BOOLEAN('n', "null", &null_run,
1096                     "null run - dont start any counters"),
1097         OPT_INCR('d', "detailed", &detailed_run,
1098                     "detailed run - start a lot of events"),
1099         OPT_BOOLEAN('S', "sync", &sync_run,
1100                     "call sync() before starting a run"),
1101         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 
1102                            "print large numbers with thousands\' separators",
1103                            stat__set_big_num),
1104         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1105                     "list of cpus to monitor in system-wide"),
1106         OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1107                     "disable CPU count aggregation"),
1108         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1109                    "print counts with custom separator"),
1110         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1111                      "monitor event in cgroup name only",
1112                      parse_cgroups),
1113         OPT_STRING('o', "output", &output_name, "file",
1114                     "output file name"),
1115         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1116         OPT_INTEGER(0, "log-fd", &output_fd,
1117                     "log output to fd, instead of stderr"),
1118         OPT_END()
1119 };
1120
1121 /*
1122  * Add default attributes, if there were no attributes specified or
1123  * if -d/--detailed, -d -d or -d -d -d is used:
1124  */
1125 static int add_default_attributes(void)
1126 {
1127         /* Set attrs if no event is selected and !null_run: */
1128         if (null_run)
1129                 return 0;
1130
1131         if (!evsel_list->nr_entries) {
1132                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1133                         return -1;
1134         }
1135
1136         /* Detailed events get appended to the event list: */
1137
1138         if (detailed_run <  1)
1139                 return 0;
1140
1141         /* Append detailed run extra attributes: */
1142         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1143                 return -1;
1144
1145         if (detailed_run < 2)
1146                 return 0;
1147
1148         /* Append very detailed run extra attributes: */
1149         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1150                 return -1;
1151
1152         if (detailed_run < 3)
1153                 return 0;
1154
1155         /* Append very, very detailed run extra attributes: */
1156         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1157 }
1158
1159 int cmd_stat(int argc, const char **argv, const char *prefix __used)
1160 {
1161         struct perf_evsel *pos;
1162         int status = -ENOMEM;
1163         const char *mode;
1164
1165         setlocale(LC_ALL, "");
1166
1167         evsel_list = perf_evlist__new(NULL, NULL);
1168         if (evsel_list == NULL)
1169                 return -ENOMEM;
1170
1171         argc = parse_options(argc, argv, options, stat_usage,
1172                 PARSE_OPT_STOP_AT_NON_OPTION);
1173
1174         output = stderr;
1175         if (output_name && strcmp(output_name, "-"))
1176                 output = NULL;
1177
1178         if (output_name && output_fd) {
1179                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1180                 usage_with_options(stat_usage, options);
1181         }
1182
1183         if (output_fd < 0) {
1184                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1185                 usage_with_options(stat_usage, options);
1186         }
1187
1188         if (!output) {
1189                 struct timespec tm;
1190                 mode = append_file ? "a" : "w";
1191
1192                 output = fopen(output_name, mode);
1193                 if (!output) {
1194                         perror("failed to create output file");
1195                         exit(-1);
1196                 }
1197                 clock_gettime(CLOCK_REALTIME, &tm);
1198                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1199         } else if (output_fd > 0) {
1200                 mode = append_file ? "a" : "w";
1201                 output = fdopen(output_fd, mode);
1202                 if (!output) {
1203                         perror("Failed opening logfd");
1204                         return -errno;
1205                 }
1206         }
1207
1208         if (csv_sep) {
1209                 csv_output = true;
1210                 if (!strcmp(csv_sep, "\\t"))
1211                         csv_sep = "\t";
1212         } else
1213                 csv_sep = DEFAULT_SEPARATOR;
1214
1215         /*
1216          * let the spreadsheet do the pretty-printing
1217          */
1218         if (csv_output) {
1219                 /* User explicitly passed -B? */
1220                 if (big_num_opt == 1) {
1221                         fprintf(stderr, "-B option not supported with -x\n");
1222                         usage_with_options(stat_usage, options);
1223                 } else /* Nope, so disable big number formatting */
1224                         big_num = false;
1225         } else if (big_num_opt == 0) /* User passed --no-big-num */
1226                 big_num = false;
1227
1228         if (!argc && !perf_target__has_task(&target))
1229                 usage_with_options(stat_usage, options);
1230         if (run_count <= 0)
1231                 usage_with_options(stat_usage, options);
1232
1233         /* no_aggr, cgroup are for system-wide only */
1234         if ((no_aggr || nr_cgroups) && !perf_target__has_cpu(&target)) {
1235                 fprintf(stderr, "both cgroup and no-aggregation "
1236                         "modes only available in system-wide mode\n");
1237
1238                 usage_with_options(stat_usage, options);
1239         }
1240
1241         if (add_default_attributes())
1242                 goto out;
1243
1244         perf_target__validate(&target);
1245
1246         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1247                 if (perf_target__has_task(&target))
1248                         pr_err("Problems finding threads of monitor\n");
1249                 if (perf_target__has_cpu(&target))
1250                         perror("failed to parse CPUs map");
1251
1252                 usage_with_options(stat_usage, options);
1253                 return -1;
1254         }
1255
1256         list_for_each_entry(pos, &evsel_list->entries, node) {
1257                 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1258                     perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0)
1259                         goto out_free_fd;
1260         }
1261
1262         /*
1263          * We dont want to block the signals - that would cause
1264          * child tasks to inherit that and Ctrl-C would not work.
1265          * What we want is for Ctrl-C to work in the exec()-ed
1266          * task, but being ignored by perf stat itself:
1267          */
1268         atexit(sig_atexit);
1269         signal(SIGINT,  skip_signal);
1270         signal(SIGALRM, skip_signal);
1271         signal(SIGABRT, skip_signal);
1272
1273         status = 0;
1274         for (run_idx = 0; run_idx < run_count; run_idx++) {
1275                 if (run_count != 1 && verbose)
1276                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1277                                 run_idx + 1);
1278
1279                 if (sync_run)
1280                         sync();
1281
1282                 status = run_perf_stat(argc, argv);
1283         }
1284
1285         if (status != -1)
1286                 print_stat(argc, argv);
1287 out_free_fd:
1288         list_for_each_entry(pos, &evsel_list->entries, node)
1289                 perf_evsel__free_stat_priv(pos);
1290         perf_evlist__delete_maps(evsel_list);
1291 out:
1292         perf_evlist__delete(evsel_list);
1293         return status;
1294 }