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