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[linux-2.6/next.git] / tools / perf / builtin-stat.c
bloba9f06715e44d021567131317310bc6096547e666
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
65 static struct perf_event_attr default_attrs[] = {
66
67 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
68 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
69 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
70 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
71
72 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
73 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
74 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
75 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
76 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
77 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
78
79 };
80
81 /*
82 * Detailed stats (-d), covering the L1 and last level data caches:
83 */
84 static struct perf_event_attr detailed_attrs[] = {
85
86 { .type = PERF_TYPE_HW_CACHE,
87 .config =
88 PERF_COUNT_HW_CACHE_L1D << 0 |
89 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
90 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
91
92 { .type = PERF_TYPE_HW_CACHE,
93 .config =
94 PERF_COUNT_HW_CACHE_L1D << 0 |
95 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
96 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
97
98 { .type = PERF_TYPE_HW_CACHE,
99 .config =
100 PERF_COUNT_HW_CACHE_LL << 0 |
101 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
102 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
103
104 { .type = PERF_TYPE_HW_CACHE,
105 .config =
106 PERF_COUNT_HW_CACHE_LL << 0 |
107 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
108 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
109 };
110
111 /*
112 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
113 */
114 static struct perf_event_attr very_detailed_attrs[] = {
115
116 { .type = PERF_TYPE_HW_CACHE,
117 .config =
118 PERF_COUNT_HW_CACHE_L1I << 0 |
119 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
120 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
121
122 { .type = PERF_TYPE_HW_CACHE,
123 .config =
124 PERF_COUNT_HW_CACHE_L1I << 0 |
125 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
126 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
127
128 { .type = PERF_TYPE_HW_CACHE,
129 .config =
130 PERF_COUNT_HW_CACHE_DTLB << 0 |
131 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
132 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
133
134 { .type = PERF_TYPE_HW_CACHE,
135 .config =
136 PERF_COUNT_HW_CACHE_DTLB << 0 |
137 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
138 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
139
140 { .type = PERF_TYPE_HW_CACHE,
141 .config =
142 PERF_COUNT_HW_CACHE_ITLB << 0 |
143 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
144 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
145
146 { .type = PERF_TYPE_HW_CACHE,
147 .config =
148 PERF_COUNT_HW_CACHE_ITLB << 0 |
149 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
150 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
151
152 };
153
154 /*
155 * Very, very detailed stats (-d -d -d), adding prefetch events:
156 */
157 static struct perf_event_attr very_very_detailed_attrs[] = {
158
159 { .type = PERF_TYPE_HW_CACHE,
160 .config =
161 PERF_COUNT_HW_CACHE_L1D << 0 |
162 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
163 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
164
165 { .type = PERF_TYPE_HW_CACHE,
166 .config =
167 PERF_COUNT_HW_CACHE_L1D << 0 |
168 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
169 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
170 };
171
172
173
174 struct perf_evlist *evsel_list;
175
176 static bool system_wide = false;
177 static int run_idx = 0;
178
179 static int run_count = 1;
180 static bool no_inherit = false;
181 static bool scale = true;
182 static bool no_aggr = false;
183 static pid_t target_pid = -1;
184 static pid_t target_tid = -1;
185 static pid_t child_pid = -1;
186 static bool null_run = false;
187 static int detailed_run = 0;
188 static bool sync_run = false;
189 static bool big_num = true;
190 static int big_num_opt = -1;
191 static const char *cpu_list;
192 static const char *csv_sep = NULL;
193 static bool csv_output = false;
194
195 static volatile int done = 0;
196
197 struct stats
198 {
199 double n, mean, M2;
200 };
201
202 struct perf_stat {
203 struct stats res_stats[3];
204 };
205
206 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
207 {
208 evsel->priv = zalloc(sizeof(struct perf_stat));
209 return evsel->priv == NULL ? -ENOMEM : 0;
210 }
211
212 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
213 {
214 free(evsel->priv);
215 evsel->priv = NULL;
216 }
217
218 static void update_stats(struct stats *stats, u64 val)
219 {
220 double delta;
221
222 stats->n++;
223 delta = val - stats->mean;
224 stats->mean += delta / stats->n;
225 stats->M2 += delta*(val - stats->mean);
226 }
227
228 static double avg_stats(struct stats *stats)
229 {
230 return stats->mean;
231 }
232
233 /*
234 * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
235 *
236 * (\Sum n_i^2) - ((\Sum n_i)^2)/n
237 * s^2 = -------------------------------
238 * n - 1
239 *
240 * http://en.wikipedia.org/wiki/Stddev
241 *
242 * The std dev of the mean is related to the std dev by:
243 *
244 * s
245 * s_mean = -------
246 * sqrt(n)
247 *
248 */
249 static double stddev_stats(struct stats *stats)
250 {
251 double variance = stats->M2 / (stats->n - 1);
252 double variance_mean = variance / stats->n;
253
254 return sqrt(variance_mean);
255 }
256
257 struct stats runtime_nsecs_stats[MAX_NR_CPUS];
258 struct stats runtime_cycles_stats[MAX_NR_CPUS];
259 struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
260 struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
261 struct stats runtime_branches_stats[MAX_NR_CPUS];
262 struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
263 struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
264 struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
265 struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
266 struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
267 struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
268 struct stats walltime_nsecs_stats;
269
270 static int create_perf_stat_counter(struct perf_evsel *evsel)
271 {
272 struct perf_event_attr *attr = &evsel->attr;
273
274 if (scale)
275 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
276 PERF_FORMAT_TOTAL_TIME_RUNNING;
277
278 attr->inherit = !no_inherit;
279
280 if (system_wide)
281 return perf_evsel__open_per_cpu(evsel, evsel_list->cpus, false);
282
283 if (target_pid == -1 && target_tid == -1) {
284 attr->disabled = 1;
285 attr->enable_on_exec = 1;
286 }
287
288 return perf_evsel__open_per_thread(evsel, evsel_list->threads, false);
289 }
290
291 /*
292 * Does the counter have nsecs as a unit?
293 */
294 static inline int nsec_counter(struct perf_evsel *evsel)
295 {
296 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
297 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
298 return 1;
299
300 return 0;
301 }
302
303 /*
304 * Update various tracking values we maintain to print
305 * more semantic information such as miss/hit ratios,
306 * instruction rates, etc:
307 */
308 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
309 {
310 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
311 update_stats(&runtime_nsecs_stats[0], count[0]);
312 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
313 update_stats(&runtime_cycles_stats[0], count[0]);
314 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
315 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
316 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
317 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
318 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
319 update_stats(&runtime_branches_stats[0], count[0]);
320 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
321 update_stats(&runtime_cacherefs_stats[0], count[0]);
322 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
323 update_stats(&runtime_l1_dcache_stats[0], count[0]);
324 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
325 update_stats(&runtime_l1_icache_stats[0], count[0]);
326 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
327 update_stats(&runtime_ll_cache_stats[0], count[0]);
328 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
329 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
330 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
331 update_stats(&runtime_itlb_cache_stats[0], count[0]);
332 }
333
334 /*
335 * Read out the results of a single counter:
336 * aggregate counts across CPUs in system-wide mode
337 */
338 static int read_counter_aggr(struct perf_evsel *counter)
339 {
340 struct perf_stat *ps = counter->priv;
341 u64 *count = counter->counts->aggr.values;
342 int i;
343
344 if (__perf_evsel__read(counter, evsel_list->cpus->nr,
345 evsel_list->threads->nr, scale) < 0)
346 return -1;
347
348 for (i = 0; i < 3; i++)
349 update_stats(&ps->res_stats[i], count[i]);
350
351 if (verbose) {
352 fprintf(stderr, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
353 event_name(counter), count[0], count[1], count[2]);
354 }
355
356 /*
357 * Save the full runtime - to allow normalization during printout:
358 */
359 update_shadow_stats(counter, count);
360
361 return 0;
362 }
363
364 /*
365 * Read out the results of a single counter:
366 * do not aggregate counts across CPUs in system-wide mode
367 */
368 static int read_counter(struct perf_evsel *counter)
369 {
370 u64 *count;
371 int cpu;
372
373 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
374 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
375 return -1;
376
377 count = counter->counts->cpu[cpu].values;
378
379 update_shadow_stats(counter, count);
380 }
381
382 return 0;
383 }
384
385 static int run_perf_stat(int argc __used, const char **argv)
386 {
387 unsigned long long t0, t1;
388 struct perf_evsel *counter;
389 int status = 0;
390 int child_ready_pipe[2], go_pipe[2];
391 const bool forks = (argc > 0);
392 char buf;
393
394 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
395 perror("failed to create pipes");
396 exit(1);
397 }
398
399 if (forks) {
400 if ((child_pid = fork()) < 0)
401 perror("failed to fork");
402
403 if (!child_pid) {
404 close(child_ready_pipe[0]);
405 close(go_pipe[1]);
406 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
407
408 /*
409 * Do a dummy execvp to get the PLT entry resolved,
410 * so we avoid the resolver overhead on the real
411 * execvp call.
412 */
413 execvp("", (char **)argv);
414
415 /*
416 * Tell the parent we're ready to go
417 */
418 close(child_ready_pipe[1]);
419
420 /*
421 * Wait until the parent tells us to go.
422 */
423 if (read(go_pipe[0], &buf, 1) == -1)
424 perror("unable to read pipe");
425
426 execvp(argv[0], (char **)argv);
427
428 perror(argv[0]);
429 exit(-1);
430 }
431
432 if (target_tid == -1 && target_pid == -1 && !system_wide)
433 evsel_list->threads->map[0] = child_pid;
434
435 /*
436 * Wait for the child to be ready to exec.
437 */
438 close(child_ready_pipe[1]);
439 close(go_pipe[0]);
440 if (read(child_ready_pipe[0], &buf, 1) == -1)
441 perror("unable to read pipe");
442 close(child_ready_pipe[0]);
443 }
444
445 list_for_each_entry(counter, &evsel_list->entries, node) {
446 if (create_perf_stat_counter(counter) < 0) {
447 if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) {
448 if (verbose)
449 ui__warning("%s event is not supported by the kernel.\n",
450 event_name(counter));
451 continue;
452 }
453
454 if (errno == EPERM || errno == EACCES) {
455 error("You may not have permission to collect %sstats.\n"
456 "\t Consider tweaking"
457 " /proc/sys/kernel/perf_event_paranoid or running as root.",
458 system_wide ? "system-wide " : "");
459 } else {
460 error("open_counter returned with %d (%s). "
461 "/bin/dmesg may provide additional information.\n",
462 errno, strerror(errno));
463 }
464 if (child_pid != -1)
465 kill(child_pid, SIGTERM);
466 die("Not all events could be opened.\n");
467 return -1;
468 }
469 }
470
471 if (perf_evlist__set_filters(evsel_list)) {
472 error("failed to set filter with %d (%s)\n", errno,
473 strerror(errno));
474 return -1;
475 }
476
477 /*
478 * Enable counters and exec the command:
479 */
480 t0 = rdclock();
481
482 if (forks) {
483 close(go_pipe[1]);
484 wait(&status);
485 } else {
486 while(!done) sleep(1);
487 }
488
489 t1 = rdclock();
490
491 update_stats(&walltime_nsecs_stats, t1 - t0);
492
493 if (no_aggr) {
494 list_for_each_entry(counter, &evsel_list->entries, node) {
495 read_counter(counter);
496 perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
497 }
498 } else {
499 list_for_each_entry(counter, &evsel_list->entries, node) {
500 read_counter_aggr(counter);
501 perf_evsel__close_fd(counter, evsel_list->cpus->nr,
502 evsel_list->threads->nr);
503 }
504 }
505
506 return WEXITSTATUS(status);
507 }
508
509 static void print_noise_pct(double total, double avg)
510 {
511 double pct = 0.0;
512
513 if (avg)
514 pct = 100.0*total/avg;
515
516 fprintf(stderr, " ( +-%6.2f%% )", pct);
517 }
518
519 static void print_noise(struct perf_evsel *evsel, double avg)
520 {
521 struct perf_stat *ps;
522
523 if (run_count == 1)
524 return;
525
526 ps = evsel->priv;
527 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
528 }
529
530 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
531 {
532 double msecs = avg / 1e6;
533 char cpustr[16] = { '\0', };
534 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
535
536 if (no_aggr)
537 sprintf(cpustr, "CPU%*d%s",
538 csv_output ? 0 : -4,
539 evsel_list->cpus->map[cpu], csv_sep);
540
541 fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel));
542
543 if (evsel->cgrp)
544 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
545
546 if (csv_output)
547 return;
548
549 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
550 fprintf(stderr, " # %8.3f CPUs utilized ", avg / avg_stats(&walltime_nsecs_stats));
551 }
552
553 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
554 {
555 double total, ratio = 0.0;
556 const char *color;
557
558 total = avg_stats(&runtime_cycles_stats[cpu]);
559
560 if (total)
561 ratio = avg / total * 100.0;
562
563 color = PERF_COLOR_NORMAL;
564 if (ratio > 50.0)
565 color = PERF_COLOR_RED;
566 else if (ratio > 30.0)
567 color = PERF_COLOR_MAGENTA;
568 else if (ratio > 10.0)
569 color = PERF_COLOR_YELLOW;
570
571 fprintf(stderr, " # ");
572 color_fprintf(stderr, color, "%6.2f%%", ratio);
573 fprintf(stderr, " frontend cycles idle ");
574 }
575
576 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
577 {
578 double total, ratio = 0.0;
579 const char *color;
580
581 total = avg_stats(&runtime_cycles_stats[cpu]);
582
583 if (total)
584 ratio = avg / total * 100.0;
585
586 color = PERF_COLOR_NORMAL;
587 if (ratio > 75.0)
588 color = PERF_COLOR_RED;
589 else if (ratio > 50.0)
590 color = PERF_COLOR_MAGENTA;
591 else if (ratio > 20.0)
592 color = PERF_COLOR_YELLOW;
593
594 fprintf(stderr, " # ");
595 color_fprintf(stderr, color, "%6.2f%%", ratio);
596 fprintf(stderr, " backend cycles idle ");
597 }
598
599 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
600 {
601 double total, ratio = 0.0;
602 const char *color;
603
604 total = avg_stats(&runtime_branches_stats[cpu]);
605
606 if (total)
607 ratio = avg / total * 100.0;
608
609 color = PERF_COLOR_NORMAL;
610 if (ratio > 20.0)
611 color = PERF_COLOR_RED;
612 else if (ratio > 10.0)
613 color = PERF_COLOR_MAGENTA;
614 else if (ratio > 5.0)
615 color = PERF_COLOR_YELLOW;
616
617 fprintf(stderr, " # ");
618 color_fprintf(stderr, color, "%6.2f%%", ratio);
619 fprintf(stderr, " of all branches ");
620 }
621
622 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
623 {
624 double total, ratio = 0.0;
625 const char *color;
626
627 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
628
629 if (total)
630 ratio = avg / total * 100.0;
631
632 color = PERF_COLOR_NORMAL;
633 if (ratio > 20.0)
634 color = PERF_COLOR_RED;
635 else if (ratio > 10.0)
636 color = PERF_COLOR_MAGENTA;
637 else if (ratio > 5.0)
638 color = PERF_COLOR_YELLOW;
639
640 fprintf(stderr, " # ");
641 color_fprintf(stderr, color, "%6.2f%%", ratio);
642 fprintf(stderr, " of all L1-dcache hits ");
643 }
644
645 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
646 {
647 double total, ratio = 0.0;
648 const char *color;
649
650 total = avg_stats(&runtime_l1_icache_stats[cpu]);
651
652 if (total)
653 ratio = avg / total * 100.0;
654
655 color = PERF_COLOR_NORMAL;
656 if (ratio > 20.0)
657 color = PERF_COLOR_RED;
658 else if (ratio > 10.0)
659 color = PERF_COLOR_MAGENTA;
660 else if (ratio > 5.0)
661 color = PERF_COLOR_YELLOW;
662
663 fprintf(stderr, " # ");
664 color_fprintf(stderr, color, "%6.2f%%", ratio);
665 fprintf(stderr, " of all L1-icache hits ");
666 }
667
668 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
669 {
670 double total, ratio = 0.0;
671 const char *color;
672
673 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
674
675 if (total)
676 ratio = avg / total * 100.0;
677
678 color = PERF_COLOR_NORMAL;
679 if (ratio > 20.0)
680 color = PERF_COLOR_RED;
681 else if (ratio > 10.0)
682 color = PERF_COLOR_MAGENTA;
683 else if (ratio > 5.0)
684 color = PERF_COLOR_YELLOW;
685
686 fprintf(stderr, " # ");
687 color_fprintf(stderr, color, "%6.2f%%", ratio);
688 fprintf(stderr, " of all dTLB cache hits ");
689 }
690
691 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
692 {
693 double total, ratio = 0.0;
694 const char *color;
695
696 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
697
698 if (total)
699 ratio = avg / total * 100.0;
700
701 color = PERF_COLOR_NORMAL;
702 if (ratio > 20.0)
703 color = PERF_COLOR_RED;
704 else if (ratio > 10.0)
705 color = PERF_COLOR_MAGENTA;
706 else if (ratio > 5.0)
707 color = PERF_COLOR_YELLOW;
708
709 fprintf(stderr, " # ");
710 color_fprintf(stderr, color, "%6.2f%%", ratio);
711 fprintf(stderr, " of all iTLB cache hits ");
712 }
713
714 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
715 {
716 double total, ratio = 0.0;
717 const char *color;
718
719 total = avg_stats(&runtime_ll_cache_stats[cpu]);
720
721 if (total)
722 ratio = avg / total * 100.0;
723
724 color = PERF_COLOR_NORMAL;
725 if (ratio > 20.0)
726 color = PERF_COLOR_RED;
727 else if (ratio > 10.0)
728 color = PERF_COLOR_MAGENTA;
729 else if (ratio > 5.0)
730 color = PERF_COLOR_YELLOW;
731
732 fprintf(stderr, " # ");
733 color_fprintf(stderr, color, "%6.2f%%", ratio);
734 fprintf(stderr, " of all LL-cache hits ");
735 }
736
737 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
738 {
739 double total, ratio = 0.0;
740 char cpustr[16] = { '\0', };
741 const char *fmt;
742
743 if (csv_output)
744 fmt = "%s%.0f%s%s";
745 else if (big_num)
746 fmt = "%s%'18.0f%s%-25s";
747 else
748 fmt = "%s%18.0f%s%-25s";
749
750 if (no_aggr)
751 sprintf(cpustr, "CPU%*d%s",
752 csv_output ? 0 : -4,
753 evsel_list->cpus->map[cpu], csv_sep);
754 else
755 cpu = 0;
756
757 fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel));
758
759 if (evsel->cgrp)
760 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
761
762 if (csv_output)
763 return;
764
765 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
766 total = avg_stats(&runtime_cycles_stats[cpu]);
767
768 if (total)
769 ratio = avg / total;
770
771 fprintf(stderr, " # %5.2f insns per cycle ", ratio);
772
773 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
774 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
775
776 if (total && avg) {
777 ratio = total / avg;
778 fprintf(stderr, "\n # %5.2f stalled cycles per insn", ratio);
779 }
780
781 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
782 runtime_branches_stats[cpu].n != 0) {
783 print_branch_misses(cpu, evsel, avg);
784 } else if (
785 evsel->attr.type == PERF_TYPE_HW_CACHE &&
786 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
787 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
788 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
789 runtime_l1_dcache_stats[cpu].n != 0) {
790 print_l1_dcache_misses(cpu, evsel, avg);
791 } else if (
792 evsel->attr.type == PERF_TYPE_HW_CACHE &&
793 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
794 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
795 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
796 runtime_l1_icache_stats[cpu].n != 0) {
797 print_l1_icache_misses(cpu, evsel, avg);
798 } else if (
799 evsel->attr.type == PERF_TYPE_HW_CACHE &&
800 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
801 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
802 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
803 runtime_dtlb_cache_stats[cpu].n != 0) {
804 print_dtlb_cache_misses(cpu, evsel, avg);
805 } else if (
806 evsel->attr.type == PERF_TYPE_HW_CACHE &&
807 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
808 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
809 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
810 runtime_itlb_cache_stats[cpu].n != 0) {
811 print_itlb_cache_misses(cpu, evsel, avg);
812 } else if (
813 evsel->attr.type == PERF_TYPE_HW_CACHE &&
814 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
815 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
816 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
817 runtime_ll_cache_stats[cpu].n != 0) {
818 print_ll_cache_misses(cpu, evsel, avg);
819 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
820 runtime_cacherefs_stats[cpu].n != 0) {
821 total = avg_stats(&runtime_cacherefs_stats[cpu]);
822
823 if (total)
824 ratio = avg * 100 / total;
825
826 fprintf(stderr, " # %8.3f %% of all cache refs ", ratio);
827
828 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
829 print_stalled_cycles_frontend(cpu, evsel, avg);
830 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
831 print_stalled_cycles_backend(cpu, evsel, avg);
832 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
833 total = avg_stats(&runtime_nsecs_stats[cpu]);
834
835 if (total)
836 ratio = 1.0 * avg / total;
837
838 fprintf(stderr, " # %8.3f GHz ", ratio);
839 } else if (runtime_nsecs_stats[cpu].n != 0) {
840 total = avg_stats(&runtime_nsecs_stats[cpu]);
841
842 if (total)
843 ratio = 1000.0 * avg / total;
844
845 fprintf(stderr, " # %8.3f M/sec ", ratio);
846 } else {
847 fprintf(stderr, " ");
848 }
849 }
850
851 /*
852 * Print out the results of a single counter:
853 * aggregated counts in system-wide mode
854 */
855 static void print_counter_aggr(struct perf_evsel *counter)
856 {
857 struct perf_stat *ps = counter->priv;
858 double avg = avg_stats(&ps->res_stats[0]);
859 int scaled = counter->counts->scaled;
860
861 if (scaled == -1) {
862 fprintf(stderr, "%*s%s%*s",
863 csv_output ? 0 : 18,
864 "<not counted>",
865 csv_sep,
866 csv_output ? 0 : -24,
867 event_name(counter));
868
869 if (counter->cgrp)
870 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
871
872 fputc('\n', stderr);
873 return;
874 }
875
876 if (nsec_counter(counter))
877 nsec_printout(-1, counter, avg);
878 else
879 abs_printout(-1, counter, avg);
880
881 if (csv_output) {
882 fputc('\n', stderr);
883 return;
884 }
885
886 print_noise(counter, avg);
887
888 if (scaled) {
889 double avg_enabled, avg_running;
890
891 avg_enabled = avg_stats(&ps->res_stats[1]);
892 avg_running = avg_stats(&ps->res_stats[2]);
893
894 fprintf(stderr, " [%5.2f%%]", 100 * avg_running / avg_enabled);
895 }
896 fprintf(stderr, "\n");
897 }
898
899 /*
900 * Print out the results of a single counter:
901 * does not use aggregated count in system-wide
902 */
903 static void print_counter(struct perf_evsel *counter)
904 {
905 u64 ena, run, val;
906 int cpu;
907
908 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
909 val = counter->counts->cpu[cpu].val;
910 ena = counter->counts->cpu[cpu].ena;
911 run = counter->counts->cpu[cpu].run;
912 if (run == 0 || ena == 0) {
913 fprintf(stderr, "CPU%*d%s%*s%s%*s",
914 csv_output ? 0 : -4,
915 evsel_list->cpus->map[cpu], csv_sep,
916 csv_output ? 0 : 18,
917 "<not counted>", csv_sep,
918 csv_output ? 0 : -24,
919 event_name(counter));
920
921 if (counter->cgrp)
922 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
923
924 fputc('\n', stderr);
925 continue;
926 }
927
928 if (nsec_counter(counter))
929 nsec_printout(cpu, counter, val);
930 else
931 abs_printout(cpu, counter, val);
932
933 if (!csv_output) {
934 print_noise(counter, 1.0);
935
936 if (run != ena)
937 fprintf(stderr, " (%.2f%%)", 100.0 * run / ena);
938 }
939 fputc('\n', stderr);
940 }
941 }
942
943 static void print_stat(int argc, const char **argv)
944 {
945 struct perf_evsel *counter;
946 int i;
947
948 fflush(stdout);
949
950 if (!csv_output) {
951 fprintf(stderr, "\n");
952 fprintf(stderr, " Performance counter stats for ");
953 if(target_pid == -1 && target_tid == -1) {
954 fprintf(stderr, "\'%s", argv[0]);
955 for (i = 1; i < argc; i++)
956 fprintf(stderr, " %s", argv[i]);
957 } else if (target_pid != -1)
958 fprintf(stderr, "process id \'%d", target_pid);
959 else
960 fprintf(stderr, "thread id \'%d", target_tid);
961
962 fprintf(stderr, "\'");
963 if (run_count > 1)
964 fprintf(stderr, " (%d runs)", run_count);
965 fprintf(stderr, ":\n\n");
966 }
967
968 if (no_aggr) {
969 list_for_each_entry(counter, &evsel_list->entries, node)
970 print_counter(counter);
971 } else {
972 list_for_each_entry(counter, &evsel_list->entries, node)
973 print_counter_aggr(counter);
974 }
975
976 if (!csv_output) {
977 if (!null_run)
978 fprintf(stderr, "\n");
979 fprintf(stderr, " %17.9f seconds time elapsed",
980 avg_stats(&walltime_nsecs_stats)/1e9);
981 if (run_count > 1) {
982 fprintf(stderr, " ");
983 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
984 avg_stats(&walltime_nsecs_stats));
985 }
986 fprintf(stderr, "\n\n");
987 }
988 }
989
990 static volatile int signr = -1;
991
992 static void skip_signal(int signo)
993 {
994 if(child_pid == -1)
995 done = 1;
996
997 signr = signo;
998 }
999
1000 static void sig_atexit(void)
1001 {
1002 if (child_pid != -1)
1003 kill(child_pid, SIGTERM);
1004
1005 if (signr == -1)
1006 return;
1007
1008 signal(signr, SIG_DFL);
1009 kill(getpid(), signr);
1010 }
1011
1012 static const char * const stat_usage[] = {
1013 "perf stat [<options>] [<command>]",
1014 NULL
1015 };
1016
1017 static int stat__set_big_num(const struct option *opt __used,
1018 const char *s __used, int unset)
1019 {
1020 big_num_opt = unset ? 0 : 1;
1021 return 0;
1022 }
1023
1024 static const struct option options[] = {
1025 OPT_CALLBACK('e', "event", &evsel_list, "event",
1026 "event selector. use 'perf list' to list available events",
1027 parse_events),
1028 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1029 "event filter", parse_filter),
1030 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1031 "child tasks do not inherit counters"),
1032 OPT_INTEGER('p', "pid", &target_pid,
1033 "stat events on existing process id"),
1034 OPT_INTEGER('t', "tid", &target_tid,
1035 "stat events on existing thread id"),
1036 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1037 "system-wide collection from all CPUs"),
1038 OPT_BOOLEAN('c', "scale", &scale,
1039 "scale/normalize counters"),
1040 OPT_INCR('v', "verbose", &verbose,
1041 "be more verbose (show counter open errors, etc)"),
1042 OPT_INTEGER('r', "repeat", &run_count,
1043 "repeat command and print average + stddev (max: 100)"),
1044 OPT_BOOLEAN('n', "null", &null_run,
1045 "null run - dont start any counters"),
1046 OPT_INCR('d', "detailed", &detailed_run,
1047 "detailed run - start a lot of events"),
1048 OPT_BOOLEAN('S', "sync", &sync_run,
1049 "call sync() before starting a run"),
1050 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1051 "print large numbers with thousands\' separators",
1052 stat__set_big_num),
1053 OPT_STRING('C', "cpu", &cpu_list, "cpu",
1054 "list of cpus to monitor in system-wide"),
1055 OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1056 "disable CPU count aggregation"),
1057 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1058 "print counts with custom separator"),
1059 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1060 "monitor event in cgroup name only",
1061 parse_cgroups),
1062 OPT_END()
1063 };
1064
1065 /*
1066 * Add default attributes, if there were no attributes specified or
1067 * if -d/--detailed, -d -d or -d -d -d is used:
1068 */
1069 static int add_default_attributes(void)
1070 {
1071 struct perf_evsel *pos;
1072 size_t attr_nr = 0;
1073 size_t c;
1074
1075 /* Set attrs if no event is selected and !null_run: */
1076 if (null_run)
1077 return 0;
1078
1079 if (!evsel_list->nr_entries) {
1080 for (c = 0; c < ARRAY_SIZE(default_attrs); c++) {
1081 pos = perf_evsel__new(default_attrs + c, c + attr_nr);
1082 if (pos == NULL)
1083 return -1;
1084 perf_evlist__add(evsel_list, pos);
1085 }
1086 attr_nr += c;
1087 }
1088
1089 /* Detailed events get appended to the event list: */
1090
1091 if (detailed_run < 1)
1092 return 0;
1093
1094 /* Append detailed run extra attributes: */
1095 for (c = 0; c < ARRAY_SIZE(detailed_attrs); c++) {
1096 pos = perf_evsel__new(detailed_attrs + c, c + attr_nr);
1097 if (pos == NULL)
1098 return -1;
1099 perf_evlist__add(evsel_list, pos);
1100 }
1101 attr_nr += c;
1102
1103 if (detailed_run < 2)
1104 return 0;
1105
1106 /* Append very detailed run extra attributes: */
1107 for (c = 0; c < ARRAY_SIZE(very_detailed_attrs); c++) {
1108 pos = perf_evsel__new(very_detailed_attrs + c, c + attr_nr);
1109 if (pos == NULL)
1110 return -1;
1111 perf_evlist__add(evsel_list, pos);
1112 }
1113
1114 if (detailed_run < 3)
1115 return 0;
1116
1117 /* Append very, very detailed run extra attributes: */
1118 for (c = 0; c < ARRAY_SIZE(very_very_detailed_attrs); c++) {
1119 pos = perf_evsel__new(very_very_detailed_attrs + c, c + attr_nr);
1120 if (pos == NULL)
1121 return -1;
1122 perf_evlist__add(evsel_list, pos);
1123 }
1124
1125
1126 return 0;
1127 }
1128
1129 int cmd_stat(int argc, const char **argv, const char *prefix __used)
1130 {
1131 struct perf_evsel *pos;
1132 int status = -ENOMEM;
1133
1134 setlocale(LC_ALL, "");
1135
1136 evsel_list = perf_evlist__new(NULL, NULL);
1137 if (evsel_list == NULL)
1138 return -ENOMEM;
1139
1140 argc = parse_options(argc, argv, options, stat_usage,
1141 PARSE_OPT_STOP_AT_NON_OPTION);
1142
1143 if (csv_sep)
1144 csv_output = true;
1145 else
1146 csv_sep = DEFAULT_SEPARATOR;
1147
1148 /*
1149 * let the spreadsheet do the pretty-printing
1150 */
1151 if (csv_output) {
1152 /* User explicitely passed -B? */
1153 if (big_num_opt == 1) {
1154 fprintf(stderr, "-B option not supported with -x\n");
1155 usage_with_options(stat_usage, options);
1156 } else /* Nope, so disable big number formatting */
1157 big_num = false;
1158 } else if (big_num_opt == 0) /* User passed --no-big-num */
1159 big_num = false;
1160
1161 if (!argc && target_pid == -1 && target_tid == -1)
1162 usage_with_options(stat_usage, options);
1163 if (run_count <= 0)
1164 usage_with_options(stat_usage, options);
1165
1166 /* no_aggr, cgroup are for system-wide only */
1167 if ((no_aggr || nr_cgroups) && !system_wide) {
1168 fprintf(stderr, "both cgroup and no-aggregation "
1169 "modes only available in system-wide mode\n");
1170
1171 usage_with_options(stat_usage, options);
1172 }
1173
1174 if (add_default_attributes())
1175 goto out;
1176
1177 if (target_pid != -1)
1178 target_tid = target_pid;
1179
1180 evsel_list->threads = thread_map__new(target_pid, target_tid);
1181 if (evsel_list->threads == NULL) {
1182 pr_err("Problems finding threads of monitor\n");
1183 usage_with_options(stat_usage, options);
1184 }
1185
1186 if (system_wide)
1187 evsel_list->cpus = cpu_map__new(cpu_list);
1188 else
1189 evsel_list->cpus = cpu_map__dummy_new();
1190
1191 if (evsel_list->cpus == NULL) {
1192 perror("failed to parse CPUs map");
1193 usage_with_options(stat_usage, options);
1194 return -1;
1195 }
1196
1197 list_for_each_entry(pos, &evsel_list->entries, node) {
1198 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1199 perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 ||
1200 perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0)
1201 goto out_free_fd;
1202 }
1203
1204 /*
1205 * We dont want to block the signals - that would cause
1206 * child tasks to inherit that and Ctrl-C would not work.
1207 * What we want is for Ctrl-C to work in the exec()-ed
1208 * task, but being ignored by perf stat itself:
1209 */
1210 atexit(sig_atexit);
1211 signal(SIGINT, skip_signal);
1212 signal(SIGALRM, skip_signal);
1213 signal(SIGABRT, skip_signal);
1214
1215 status = 0;
1216 for (run_idx = 0; run_idx < run_count; run_idx++) {
1217 if (run_count != 1 && verbose)
1218 fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1);
1219
1220 if (sync_run)
1221 sync();
1222
1223 status = run_perf_stat(argc, argv);
1224 }
1225
1226 if (status != -1)
1227 print_stat(argc, argv);
1228 out_free_fd:
1229 list_for_each_entry(pos, &evsel_list->entries, node)
1230 perf_evsel__free_stat_priv(pos);
1231 perf_evlist__delete_maps(evsel_list);
1232 out:
1233 perf_evlist__delete(evsel_list);
1234 return status;
1235 }
linux-next