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