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Merge remote-tracking branch 'sysctl/master'
[linux-2.6/next.git] / tools / perf / builtin-stat.c
blob5deb17d9e79506028921b512f734b4a6becc4f32
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 pid_t target_pid = -1;
186 static pid_t target_tid = -1;
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
198 static volatile int done = 0;
199
200 struct stats
201 {
202 double n, mean, M2;
203 };
204
205 struct perf_stat {
206 struct stats res_stats[3];
207 };
208
209 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
210 {
211 evsel->priv = zalloc(sizeof(struct perf_stat));
212 return evsel->priv == NULL ? -ENOMEM : 0;
213 }
214
215 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
216 {
217 free(evsel->priv);
218 evsel->priv = NULL;
219 }
220
221 static void update_stats(struct stats *stats, u64 val)
222 {
223 double delta;
224
225 stats->n++;
226 delta = val - stats->mean;
227 stats->mean += delta / stats->n;
228 stats->M2 += delta*(val - stats->mean);
229 }
230
231 static double avg_stats(struct stats *stats)
232 {
233 return stats->mean;
234 }
235
236 /*
237 * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
238 *
239 * (\Sum n_i^2) - ((\Sum n_i)^2)/n
240 * s^2 = -------------------------------
241 * n - 1
242 *
243 * http://en.wikipedia.org/wiki/Stddev
244 *
245 * The std dev of the mean is related to the std dev by:
246 *
247 * s
248 * s_mean = -------
249 * sqrt(n)
250 *
251 */
252 static double stddev_stats(struct stats *stats)
253 {
254 double variance = stats->M2 / (stats->n - 1);
255 double variance_mean = variance / stats->n;
256
257 return sqrt(variance_mean);
258 }
259
260 struct stats runtime_nsecs_stats[MAX_NR_CPUS];
261 struct stats runtime_cycles_stats[MAX_NR_CPUS];
262 struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
263 struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
264 struct stats runtime_branches_stats[MAX_NR_CPUS];
265 struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
266 struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
267 struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
268 struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
269 struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
270 struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
271 struct stats walltime_nsecs_stats;
272
273 static int create_perf_stat_counter(struct perf_evsel *evsel)
274 {
275 struct perf_event_attr *attr = &evsel->attr;
276
277 if (scale)
278 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
279 PERF_FORMAT_TOTAL_TIME_RUNNING;
280
281 attr->inherit = !no_inherit;
282
283 if (system_wide)
284 return perf_evsel__open_per_cpu(evsel, evsel_list->cpus, group);
285
286 if (target_pid == -1 && target_tid == -1) {
287 attr->disabled = 1;
288 attr->enable_on_exec = 1;
289 }
290
291 return perf_evsel__open_per_thread(evsel, evsel_list->threads, group);
292 }
293
294 /*
295 * Does the counter have nsecs as a unit?
296 */
297 static inline int nsec_counter(struct perf_evsel *evsel)
298 {
299 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
300 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
301 return 1;
302
303 return 0;
304 }
305
306 /*
307 * Update various tracking values we maintain to print
308 * more semantic information such as miss/hit ratios,
309 * instruction rates, etc:
310 */
311 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
312 {
313 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
314 update_stats(&runtime_nsecs_stats[0], count[0]);
315 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
316 update_stats(&runtime_cycles_stats[0], count[0]);
317 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
318 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
319 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
320 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
321 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
322 update_stats(&runtime_branches_stats[0], count[0]);
323 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
324 update_stats(&runtime_cacherefs_stats[0], count[0]);
325 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
326 update_stats(&runtime_l1_dcache_stats[0], count[0]);
327 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
328 update_stats(&runtime_l1_icache_stats[0], count[0]);
329 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
330 update_stats(&runtime_ll_cache_stats[0], count[0]);
331 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
332 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
333 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
334 update_stats(&runtime_itlb_cache_stats[0], count[0]);
335 }
336
337 /*
338 * Read out the results of a single counter:
339 * aggregate counts across CPUs in system-wide mode
340 */
341 static int read_counter_aggr(struct perf_evsel *counter)
342 {
343 struct perf_stat *ps = counter->priv;
344 u64 *count = counter->counts->aggr.values;
345 int i;
346
347 if (__perf_evsel__read(counter, evsel_list->cpus->nr,
348 evsel_list->threads->nr, scale) < 0)
349 return -1;
350
351 for (i = 0; i < 3; i++)
352 update_stats(&ps->res_stats[i], count[i]);
353
354 if (verbose) {
355 fprintf(stderr, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
356 event_name(counter), count[0], count[1], count[2]);
357 }
358
359 /*
360 * Save the full runtime - to allow normalization during printout:
361 */
362 update_shadow_stats(counter, count);
363
364 return 0;
365 }
366
367 /*
368 * Read out the results of a single counter:
369 * do not aggregate counts across CPUs in system-wide mode
370 */
371 static int read_counter(struct perf_evsel *counter)
372 {
373 u64 *count;
374 int cpu;
375
376 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
377 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
378 return -1;
379
380 count = counter->counts->cpu[cpu].values;
381
382 update_shadow_stats(counter, count);
383 }
384
385 return 0;
386 }
387
388 static int run_perf_stat(int argc __used, const char **argv)
389 {
390 unsigned long long t0, t1;
391 struct perf_evsel *counter;
392 int status = 0;
393 int child_ready_pipe[2], go_pipe[2];
394 const bool forks = (argc > 0);
395 char buf;
396
397 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
398 perror("failed to create pipes");
399 exit(1);
400 }
401
402 if (forks) {
403 if ((child_pid = fork()) < 0)
404 perror("failed to fork");
405
406 if (!child_pid) {
407 close(child_ready_pipe[0]);
408 close(go_pipe[1]);
409 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
410
411 /*
412 * Do a dummy execvp to get the PLT entry resolved,
413 * so we avoid the resolver overhead on the real
414 * execvp call.
415 */
416 execvp("", (char **)argv);
417
418 /*
419 * Tell the parent we're ready to go
420 */
421 close(child_ready_pipe[1]);
422
423 /*
424 * Wait until the parent tells us to go.
425 */
426 if (read(go_pipe[0], &buf, 1) == -1)
427 perror("unable to read pipe");
428
429 execvp(argv[0], (char **)argv);
430
431 perror(argv[0]);
432 exit(-1);
433 }
434
435 if (target_tid == -1 && target_pid == -1 && !system_wide)
436 evsel_list->threads->map[0] = child_pid;
437
438 /*
439 * Wait for the child to be ready to exec.
440 */
441 close(child_ready_pipe[1]);
442 close(go_pipe[0]);
443 if (read(child_ready_pipe[0], &buf, 1) == -1)
444 perror("unable to read pipe");
445 close(child_ready_pipe[0]);
446 }
447
448 list_for_each_entry(counter, &evsel_list->entries, node) {
449 if (create_perf_stat_counter(counter) < 0) {
450 if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) {
451 if (verbose)
452 ui__warning("%s event is not supported by the kernel.\n",
453 event_name(counter));
454 counter->supported = false;
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 counter->supported = true;
474 }
475
476 if (perf_evlist__set_filters(evsel_list)) {
477 error("failed to set filter with %d (%s)\n", errno,
478 strerror(errno));
479 return -1;
480 }
481
482 /*
483 * Enable counters and exec the command:
484 */
485 t0 = rdclock();
486
487 if (forks) {
488 close(go_pipe[1]);
489 wait(&status);
490 } else {
491 while(!done) sleep(1);
492 }
493
494 t1 = rdclock();
495
496 update_stats(&walltime_nsecs_stats, t1 - t0);
497
498 if (no_aggr) {
499 list_for_each_entry(counter, &evsel_list->entries, node) {
500 read_counter(counter);
501 perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
502 }
503 } else {
504 list_for_each_entry(counter, &evsel_list->entries, node) {
505 read_counter_aggr(counter);
506 perf_evsel__close_fd(counter, evsel_list->cpus->nr,
507 evsel_list->threads->nr);
508 }
509 }
510
511 return WEXITSTATUS(status);
512 }
513
514 static void print_noise_pct(double total, double avg)
515 {
516 double pct = 0.0;
517
518 if (avg)
519 pct = 100.0*total/avg;
520
521 if (csv_output)
522 fprintf(stderr, "%s%.2f%%", csv_sep, pct);
523 else
524 fprintf(stderr, " ( +-%6.2f%% )", pct);
525 }
526
527 static void print_noise(struct perf_evsel *evsel, double avg)
528 {
529 struct perf_stat *ps;
530
531 if (run_count == 1)
532 return;
533
534 ps = evsel->priv;
535 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
536 }
537
538 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
539 {
540 double msecs = avg / 1e6;
541 char cpustr[16] = { '\0', };
542 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
543
544 if (no_aggr)
545 sprintf(cpustr, "CPU%*d%s",
546 csv_output ? 0 : -4,
547 evsel_list->cpus->map[cpu], csv_sep);
548
549 fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel));
550
551 if (evsel->cgrp)
552 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
553
554 if (csv_output)
555 return;
556
557 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
558 fprintf(stderr, " # %8.3f CPUs utilized ", avg / avg_stats(&walltime_nsecs_stats));
559 }
560
561 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
562 {
563 double total, ratio = 0.0;
564 const char *color;
565
566 total = avg_stats(&runtime_cycles_stats[cpu]);
567
568 if (total)
569 ratio = avg / total * 100.0;
570
571 color = PERF_COLOR_NORMAL;
572 if (ratio > 50.0)
573 color = PERF_COLOR_RED;
574 else if (ratio > 30.0)
575 color = PERF_COLOR_MAGENTA;
576 else if (ratio > 10.0)
577 color = PERF_COLOR_YELLOW;
578
579 fprintf(stderr, " # ");
580 color_fprintf(stderr, color, "%6.2f%%", ratio);
581 fprintf(stderr, " frontend cycles idle ");
582 }
583
584 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
585 {
586 double total, ratio = 0.0;
587 const char *color;
588
589 total = avg_stats(&runtime_cycles_stats[cpu]);
590
591 if (total)
592 ratio = avg / total * 100.0;
593
594 color = PERF_COLOR_NORMAL;
595 if (ratio > 75.0)
596 color = PERF_COLOR_RED;
597 else if (ratio > 50.0)
598 color = PERF_COLOR_MAGENTA;
599 else if (ratio > 20.0)
600 color = PERF_COLOR_YELLOW;
601
602 fprintf(stderr, " # ");
603 color_fprintf(stderr, color, "%6.2f%%", ratio);
604 fprintf(stderr, " backend cycles idle ");
605 }
606
607 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
608 {
609 double total, ratio = 0.0;
610 const char *color;
611
612 total = avg_stats(&runtime_branches_stats[cpu]);
613
614 if (total)
615 ratio = avg / total * 100.0;
616
617 color = PERF_COLOR_NORMAL;
618 if (ratio > 20.0)
619 color = PERF_COLOR_RED;
620 else if (ratio > 10.0)
621 color = PERF_COLOR_MAGENTA;
622 else if (ratio > 5.0)
623 color = PERF_COLOR_YELLOW;
624
625 fprintf(stderr, " # ");
626 color_fprintf(stderr, color, "%6.2f%%", ratio);
627 fprintf(stderr, " of all branches ");
628 }
629
630 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
631 {
632 double total, ratio = 0.0;
633 const char *color;
634
635 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
636
637 if (total)
638 ratio = avg / total * 100.0;
639
640 color = PERF_COLOR_NORMAL;
641 if (ratio > 20.0)
642 color = PERF_COLOR_RED;
643 else if (ratio > 10.0)
644 color = PERF_COLOR_MAGENTA;
645 else if (ratio > 5.0)
646 color = PERF_COLOR_YELLOW;
647
648 fprintf(stderr, " # ");
649 color_fprintf(stderr, color, "%6.2f%%", ratio);
650 fprintf(stderr, " of all L1-dcache hits ");
651 }
652
653 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
654 {
655 double total, ratio = 0.0;
656 const char *color;
657
658 total = avg_stats(&runtime_l1_icache_stats[cpu]);
659
660 if (total)
661 ratio = avg / total * 100.0;
662
663 color = PERF_COLOR_NORMAL;
664 if (ratio > 20.0)
665 color = PERF_COLOR_RED;
666 else if (ratio > 10.0)
667 color = PERF_COLOR_MAGENTA;
668 else if (ratio > 5.0)
669 color = PERF_COLOR_YELLOW;
670
671 fprintf(stderr, " # ");
672 color_fprintf(stderr, color, "%6.2f%%", ratio);
673 fprintf(stderr, " of all L1-icache hits ");
674 }
675
676 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
677 {
678 double total, ratio = 0.0;
679 const char *color;
680
681 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
682
683 if (total)
684 ratio = avg / total * 100.0;
685
686 color = PERF_COLOR_NORMAL;
687 if (ratio > 20.0)
688 color = PERF_COLOR_RED;
689 else if (ratio > 10.0)
690 color = PERF_COLOR_MAGENTA;
691 else if (ratio > 5.0)
692 color = PERF_COLOR_YELLOW;
693
694 fprintf(stderr, " # ");
695 color_fprintf(stderr, color, "%6.2f%%", ratio);
696 fprintf(stderr, " of all dTLB cache hits ");
697 }
698
699 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
700 {
701 double total, ratio = 0.0;
702 const char *color;
703
704 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
705
706 if (total)
707 ratio = avg / total * 100.0;
708
709 color = PERF_COLOR_NORMAL;
710 if (ratio > 20.0)
711 color = PERF_COLOR_RED;
712 else if (ratio > 10.0)
713 color = PERF_COLOR_MAGENTA;
714 else if (ratio > 5.0)
715 color = PERF_COLOR_YELLOW;
716
717 fprintf(stderr, " # ");
718 color_fprintf(stderr, color, "%6.2f%%", ratio);
719 fprintf(stderr, " of all iTLB cache hits ");
720 }
721
722 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
723 {
724 double total, ratio = 0.0;
725 const char *color;
726
727 total = avg_stats(&runtime_ll_cache_stats[cpu]);
728
729 if (total)
730 ratio = avg / total * 100.0;
731
732 color = PERF_COLOR_NORMAL;
733 if (ratio > 20.0)
734 color = PERF_COLOR_RED;
735 else if (ratio > 10.0)
736 color = PERF_COLOR_MAGENTA;
737 else if (ratio > 5.0)
738 color = PERF_COLOR_YELLOW;
739
740 fprintf(stderr, " # ");
741 color_fprintf(stderr, color, "%6.2f%%", ratio);
742 fprintf(stderr, " of all LL-cache hits ");
743 }
744
745 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
746 {
747 double total, ratio = 0.0;
748 char cpustr[16] = { '\0', };
749 const char *fmt;
750
751 if (csv_output)
752 fmt = "%s%.0f%s%s";
753 else if (big_num)
754 fmt = "%s%'18.0f%s%-25s";
755 else
756 fmt = "%s%18.0f%s%-25s";
757
758 if (no_aggr)
759 sprintf(cpustr, "CPU%*d%s",
760 csv_output ? 0 : -4,
761 evsel_list->cpus->map[cpu], csv_sep);
762 else
763 cpu = 0;
764
765 fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel));
766
767 if (evsel->cgrp)
768 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
769
770 if (csv_output)
771 return;
772
773 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
774 total = avg_stats(&runtime_cycles_stats[cpu]);
775
776 if (total)
777 ratio = avg / total;
778
779 fprintf(stderr, " # %5.2f insns per cycle ", ratio);
780
781 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
782 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
783
784 if (total && avg) {
785 ratio = total / avg;
786 fprintf(stderr, "\n # %5.2f stalled cycles per insn", ratio);
787 }
788
789 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
790 runtime_branches_stats[cpu].n != 0) {
791 print_branch_misses(cpu, evsel, avg);
792 } else if (
793 evsel->attr.type == PERF_TYPE_HW_CACHE &&
794 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
795 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
796 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
797 runtime_l1_dcache_stats[cpu].n != 0) {
798 print_l1_dcache_misses(cpu, evsel, avg);
799 } else if (
800 evsel->attr.type == PERF_TYPE_HW_CACHE &&
801 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
802 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
803 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
804 runtime_l1_icache_stats[cpu].n != 0) {
805 print_l1_icache_misses(cpu, evsel, avg);
806 } else if (
807 evsel->attr.type == PERF_TYPE_HW_CACHE &&
808 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
809 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
810 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
811 runtime_dtlb_cache_stats[cpu].n != 0) {
812 print_dtlb_cache_misses(cpu, evsel, avg);
813 } else if (
814 evsel->attr.type == PERF_TYPE_HW_CACHE &&
815 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
816 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
817 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
818 runtime_itlb_cache_stats[cpu].n != 0) {
819 print_itlb_cache_misses(cpu, evsel, avg);
820 } else if (
821 evsel->attr.type == PERF_TYPE_HW_CACHE &&
822 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
823 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
824 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
825 runtime_ll_cache_stats[cpu].n != 0) {
826 print_ll_cache_misses(cpu, evsel, avg);
827 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
828 runtime_cacherefs_stats[cpu].n != 0) {
829 total = avg_stats(&runtime_cacherefs_stats[cpu]);
830
831 if (total)
832 ratio = avg * 100 / total;
833
834 fprintf(stderr, " # %8.3f %% of all cache refs ", ratio);
835
836 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
837 print_stalled_cycles_frontend(cpu, evsel, avg);
838 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
839 print_stalled_cycles_backend(cpu, evsel, avg);
840 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
841 total = avg_stats(&runtime_nsecs_stats[cpu]);
842
843 if (total)
844 ratio = 1.0 * avg / total;
845
846 fprintf(stderr, " # %8.3f GHz ", ratio);
847 } else if (runtime_nsecs_stats[cpu].n != 0) {
848 total = avg_stats(&runtime_nsecs_stats[cpu]);
849
850 if (total)
851 ratio = 1000.0 * avg / total;
852
853 fprintf(stderr, " # %8.3f M/sec ", ratio);
854 } else {
855 fprintf(stderr, " ");
856 }
857 }
858
859 /*
860 * Print out the results of a single counter:
861 * aggregated counts in system-wide mode
862 */
863 static void print_counter_aggr(struct perf_evsel *counter)
864 {
865 struct perf_stat *ps = counter->priv;
866 double avg = avg_stats(&ps->res_stats[0]);
867 int scaled = counter->counts->scaled;
868
869 if (scaled == -1) {
870 fprintf(stderr, "%*s%s%*s",
871 csv_output ? 0 : 18,
872 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
873 csv_sep,
874 csv_output ? 0 : -24,
875 event_name(counter));
876
877 if (counter->cgrp)
878 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
879
880 fputc('\n', stderr);
881 return;
882 }
883
884 if (nsec_counter(counter))
885 nsec_printout(-1, counter, avg);
886 else
887 abs_printout(-1, counter, avg);
888
889 print_noise(counter, avg);
890
891 if (csv_output) {
892 fputc('\n', stderr);
893 return;
894 }
895
896 if (scaled) {
897 double avg_enabled, avg_running;
898
899 avg_enabled = avg_stats(&ps->res_stats[1]);
900 avg_running = avg_stats(&ps->res_stats[2]);
901
902 fprintf(stderr, " [%5.2f%%]", 100 * avg_running / avg_enabled);
903 }
904 fprintf(stderr, "\n");
905 }
906
907 /*
908 * Print out the results of a single counter:
909 * does not use aggregated count in system-wide
910 */
911 static void print_counter(struct perf_evsel *counter)
912 {
913 u64 ena, run, val;
914 int cpu;
915
916 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
917 val = counter->counts->cpu[cpu].val;
918 ena = counter->counts->cpu[cpu].ena;
919 run = counter->counts->cpu[cpu].run;
920 if (run == 0 || ena == 0) {
921 fprintf(stderr, "CPU%*d%s%*s%s%*s",
922 csv_output ? 0 : -4,
923 evsel_list->cpus->map[cpu], csv_sep,
924 csv_output ? 0 : 18,
925 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
926 csv_sep,
927 csv_output ? 0 : -24,
928 event_name(counter));
929
930 if (counter->cgrp)
931 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
932
933 fputc('\n', stderr);
934 continue;
935 }
936
937 if (nsec_counter(counter))
938 nsec_printout(cpu, counter, val);
939 else
940 abs_printout(cpu, counter, val);
941
942 if (!csv_output) {
943 print_noise(counter, 1.0);
944
945 if (run != ena)
946 fprintf(stderr, " (%.2f%%)", 100.0 * run / ena);
947 }
948 fputc('\n', stderr);
949 }
950 }
951
952 static void print_stat(int argc, const char **argv)
953 {
954 struct perf_evsel *counter;
955 int i;
956
957 fflush(stdout);
958
959 if (!csv_output) {
960 fprintf(stderr, "\n");
961 fprintf(stderr, " Performance counter stats for ");
962 if(target_pid == -1 && target_tid == -1) {
963 fprintf(stderr, "\'%s", argv[0]);
964 for (i = 1; i < argc; i++)
965 fprintf(stderr, " %s", argv[i]);
966 } else if (target_pid != -1)
967 fprintf(stderr, "process id \'%d", target_pid);
968 else
969 fprintf(stderr, "thread id \'%d", target_tid);
970
971 fprintf(stderr, "\'");
972 if (run_count > 1)
973 fprintf(stderr, " (%d runs)", run_count);
974 fprintf(stderr, ":\n\n");
975 }
976
977 if (no_aggr) {
978 list_for_each_entry(counter, &evsel_list->entries, node)
979 print_counter(counter);
980 } else {
981 list_for_each_entry(counter, &evsel_list->entries, node)
982 print_counter_aggr(counter);
983 }
984
985 if (!csv_output) {
986 if (!null_run)
987 fprintf(stderr, "\n");
988 fprintf(stderr, " %17.9f seconds time elapsed",
989 avg_stats(&walltime_nsecs_stats)/1e9);
990 if (run_count > 1) {
991 fprintf(stderr, " ");
992 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
993 avg_stats(&walltime_nsecs_stats));
994 }
995 fprintf(stderr, "\n\n");
996 }
997 }
998
999 static volatile int signr = -1;
1000
1001 static void skip_signal(int signo)
1002 {
1003 if(child_pid == -1)
1004 done = 1;
1005
1006 signr = signo;
1007 }
1008
1009 static void sig_atexit(void)
1010 {
1011 if (child_pid != -1)
1012 kill(child_pid, SIGTERM);
1013
1014 if (signr == -1)
1015 return;
1016
1017 signal(signr, SIG_DFL);
1018 kill(getpid(), signr);
1019 }
1020
1021 static const char * const stat_usage[] = {
1022 "perf stat [<options>] [<command>]",
1023 NULL
1024 };
1025
1026 static int stat__set_big_num(const struct option *opt __used,
1027 const char *s __used, int unset)
1028 {
1029 big_num_opt = unset ? 0 : 1;
1030 return 0;
1031 }
1032
1033 static const struct option options[] = {
1034 OPT_CALLBACK('e', "event", &evsel_list, "event",
1035 "event selector. use 'perf list' to list available events",
1036 parse_events_option),
1037 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1038 "event filter", parse_filter),
1039 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1040 "child tasks do not inherit counters"),
1041 OPT_INTEGER('p', "pid", &target_pid,
1042 "stat events on existing process id"),
1043 OPT_INTEGER('t', "tid", &target_tid,
1044 "stat events on existing thread id"),
1045 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1046 "system-wide collection from all CPUs"),
1047 OPT_BOOLEAN('g', "group", &group,
1048 "put the counters into a counter group"),
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 */
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
1140 int cmd_stat(int argc, const char **argv, const char *prefix __used)
1141 {
1142 struct perf_evsel *pos;
1143 int status = -ENOMEM;
1144
1145 setlocale(LC_ALL, "");
1146
1147 evsel_list = perf_evlist__new(NULL, NULL);
1148 if (evsel_list == NULL)
1149 return -ENOMEM;
1150
1151 argc = parse_options(argc, argv, options, stat_usage,
1152 PARSE_OPT_STOP_AT_NON_OPTION);
1153
1154 if (csv_sep)
1155 csv_output = true;
1156 else
1157 csv_sep = DEFAULT_SEPARATOR;
1158
1159 /*
1160 * let the spreadsheet do the pretty-printing
1161 */
1162 if (csv_output) {
1163 /* User explicitely passed -B? */
1164 if (big_num_opt == 1) {
1165 fprintf(stderr, "-B option not supported with -x\n");
1166 usage_with_options(stat_usage, options);
1167 } else /* Nope, so disable big number formatting */
1168 big_num = false;
1169 } else if (big_num_opt == 0) /* User passed --no-big-num */
1170 big_num = false;
1171
1172 if (!argc && target_pid == -1 && target_tid == -1)
1173 usage_with_options(stat_usage, options);
1174 if (run_count <= 0)
1175 usage_with_options(stat_usage, options);
1176
1177 /* no_aggr, cgroup are for system-wide only */
1178 if ((no_aggr || nr_cgroups) && !system_wide) {
1179 fprintf(stderr, "both cgroup and no-aggregation "
1180 "modes only available in system-wide mode\n");
1181
1182 usage_with_options(stat_usage, options);
1183 }
1184
1185 if (add_default_attributes())
1186 goto out;
1187
1188 if (target_pid != -1)
1189 target_tid = target_pid;
1190
1191 evsel_list->threads = thread_map__new(target_pid, target_tid);
1192 if (evsel_list->threads == NULL) {
1193 pr_err("Problems finding threads of monitor\n");
1194 usage_with_options(stat_usage, options);
1195 }
1196
1197 if (system_wide)
1198 evsel_list->cpus = cpu_map__new(cpu_list);
1199 else
1200 evsel_list->cpus = cpu_map__dummy_new();
1201
1202 if (evsel_list->cpus == NULL) {
1203 perror("failed to parse CPUs map");
1204 usage_with_options(stat_usage, options);
1205 return -1;
1206 }
1207
1208 list_for_each_entry(pos, &evsel_list->entries, node) {
1209 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1210 perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 ||
1211 perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0)
1212 goto out_free_fd;
1213 }
1214
1215 /*
1216 * We dont want to block the signals - that would cause
1217 * child tasks to inherit that and Ctrl-C would not work.
1218 * What we want is for Ctrl-C to work in the exec()-ed
1219 * task, but being ignored by perf stat itself:
1220 */
1221 atexit(sig_atexit);
1222 signal(SIGINT, skip_signal);
1223 signal(SIGALRM, skip_signal);
1224 signal(SIGABRT, skip_signal);
1225
1226 status = 0;
1227 for (run_idx = 0; run_idx < run_count; run_idx++) {
1228 if (run_count != 1 && verbose)
1229 fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1);
1230
1231 if (sync_run)
1232 sync();
1233
1234 status = run_perf_stat(argc, argv);
1235 }
1236
1237 if (status != -1)
1238 print_stat(argc, argv);
1239 out_free_fd:
1240 list_for_each_entry(pos, &evsel_list->entries, node)
1241 perf_evsel__free_stat_priv(pos);
1242 perf_evlist__delete_maps(evsel_list);
1243 out:
1244 perf_evlist__delete(evsel_list);
1245 return status;
1246 }
linux-next