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perf tests: Move test__syscall_open_tp_fields into separate object
[linux-2.6.git] / tools / perf / builtin-stat.c
blob6888960ef8b81183d8d6cf36649b578b47c3dd4f
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/stat.h"
55 #include "util/header.h"
56 #include "util/cpumap.h"
57 #include "util/thread.h"
58 #include "util/thread_map.h"
59
60 #include <stdlib.h>
61 #include <sys/prctl.h>
62 #include <locale.h>
63
64 #define DEFAULT_SEPARATOR " "
65 #define CNTR_NOT_SUPPORTED "<not supported>"
66 #define CNTR_NOT_COUNTED "<not counted>"
67
68 static struct perf_evlist *evsel_list;
69
70 static struct perf_target target = {
71 .uid = UINT_MAX,
72 };
73
74 static int run_count = 1;
75 static bool no_inherit = false;
76 static bool scale = true;
77 static bool no_aggr = false;
78 static pid_t child_pid = -1;
79 static bool null_run = false;
80 static int detailed_run = 0;
81 static bool big_num = true;
82 static int big_num_opt = -1;
83 static const char *csv_sep = NULL;
84 static bool csv_output = false;
85 static bool group = false;
86 static FILE *output = NULL;
87 static const char *pre_cmd = NULL;
88 static const char *post_cmd = NULL;
89 static bool sync_run = false;
90
91 static volatile int done = 0;
92
93 struct perf_stat {
94 struct stats res_stats[3];
95 };
96
97 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
98 {
99 evsel->priv = zalloc(sizeof(struct perf_stat));
100 return evsel->priv == NULL ? -ENOMEM : 0;
101 }
102
103 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
104 {
105 free(evsel->priv);
106 evsel->priv = NULL;
107 }
108
109 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
110 {
111 return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
112 }
113
114 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
115 {
116 return perf_evsel__cpus(evsel)->nr;
117 }
118
119 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
120 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
121 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
122 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
123 static struct stats runtime_branches_stats[MAX_NR_CPUS];
124 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
125 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
126 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
127 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
128 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
129 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
130 static struct stats walltime_nsecs_stats;
131
132 static int create_perf_stat_counter(struct perf_evsel *evsel,
133 struct perf_evsel *first)
134 {
135 struct perf_event_attr *attr = &evsel->attr;
136 bool exclude_guest_missing = false;
137 int ret;
138
139 if (scale)
140 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
141 PERF_FORMAT_TOTAL_TIME_RUNNING;
142
143 attr->inherit = !no_inherit;
144
145 retry:
146 if (exclude_guest_missing)
147 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
148
149 if (perf_target__has_cpu(&target)) {
150 ret = perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
151 if (ret)
152 goto check_ret;
153 return 0;
154 }
155
156 if (!perf_target__has_task(&target) && (!group || evsel == first)) {
157 attr->disabled = 1;
158 attr->enable_on_exec = 1;
159 }
160
161 ret = perf_evsel__open_per_thread(evsel, evsel_list->threads);
162 if (!ret)
163 return 0;
164 /* fall through */
165 check_ret:
166 if (ret && errno == EINVAL) {
167 if (!exclude_guest_missing &&
168 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
169 pr_debug("Old kernel, cannot exclude "
170 "guest or host samples.\n");
171 exclude_guest_missing = true;
172 goto retry;
173 }
174 }
175 return ret;
176 }
177
178 /*
179 * Does the counter have nsecs as a unit?
180 */
181 static inline int nsec_counter(struct perf_evsel *evsel)
182 {
183 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
184 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
185 return 1;
186
187 return 0;
188 }
189
190 /*
191 * Update various tracking values we maintain to print
192 * more semantic information such as miss/hit ratios,
193 * instruction rates, etc:
194 */
195 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
196 {
197 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
198 update_stats(&runtime_nsecs_stats[0], count[0]);
199 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
200 update_stats(&runtime_cycles_stats[0], count[0]);
201 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
202 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
203 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
204 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
205 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
206 update_stats(&runtime_branches_stats[0], count[0]);
207 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
208 update_stats(&runtime_cacherefs_stats[0], count[0]);
209 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
210 update_stats(&runtime_l1_dcache_stats[0], count[0]);
211 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
212 update_stats(&runtime_l1_icache_stats[0], count[0]);
213 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
214 update_stats(&runtime_ll_cache_stats[0], count[0]);
215 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
216 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
217 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
218 update_stats(&runtime_itlb_cache_stats[0], count[0]);
219 }
220
221 /*
222 * Read out the results of a single counter:
223 * aggregate counts across CPUs in system-wide mode
224 */
225 static int read_counter_aggr(struct perf_evsel *counter)
226 {
227 struct perf_stat *ps = counter->priv;
228 u64 *count = counter->counts->aggr.values;
229 int i;
230
231 if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
232 evsel_list->threads->nr, scale) < 0)
233 return -1;
234
235 for (i = 0; i < 3; i++)
236 update_stats(&ps->res_stats[i], count[i]);
237
238 if (verbose) {
239 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
240 perf_evsel__name(counter), count[0], count[1], count[2]);
241 }
242
243 /*
244 * Save the full runtime - to allow normalization during printout:
245 */
246 update_shadow_stats(counter, count);
247
248 return 0;
249 }
250
251 /*
252 * Read out the results of a single counter:
253 * do not aggregate counts across CPUs in system-wide mode
254 */
255 static int read_counter(struct perf_evsel *counter)
256 {
257 u64 *count;
258 int cpu;
259
260 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
261 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
262 return -1;
263
264 count = counter->counts->cpu[cpu].values;
265
266 update_shadow_stats(counter, count);
267 }
268
269 return 0;
270 }
271
272 static int __run_perf_stat(int argc __maybe_unused, const char **argv)
273 {
274 unsigned long long t0, t1;
275 struct perf_evsel *counter, *first;
276 int status = 0;
277 int child_ready_pipe[2], go_pipe[2];
278 const bool forks = (argc > 0);
279 char buf;
280
281 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
282 perror("failed to create pipes");
283 return -1;
284 }
285
286 if (forks) {
287 if ((child_pid = fork()) < 0)
288 perror("failed to fork");
289
290 if (!child_pid) {
291 close(child_ready_pipe[0]);
292 close(go_pipe[1]);
293 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
294
295 /*
296 * Do a dummy execvp to get the PLT entry resolved,
297 * so we avoid the resolver overhead on the real
298 * execvp call.
299 */
300 execvp("", (char **)argv);
301
302 /*
303 * Tell the parent we're ready to go
304 */
305 close(child_ready_pipe[1]);
306
307 /*
308 * Wait until the parent tells us to go.
309 */
310 if (read(go_pipe[0], &buf, 1) == -1)
311 perror("unable to read pipe");
312
313 execvp(argv[0], (char **)argv);
314
315 perror(argv[0]);
316 exit(-1);
317 }
318
319 if (perf_target__none(&target))
320 evsel_list->threads->map[0] = child_pid;
321
322 /*
323 * Wait for the child to be ready to exec.
324 */
325 close(child_ready_pipe[1]);
326 close(go_pipe[0]);
327 if (read(child_ready_pipe[0], &buf, 1) == -1)
328 perror("unable to read pipe");
329 close(child_ready_pipe[0]);
330 }
331
332 if (group)
333 perf_evlist__set_leader(evsel_list);
334
335 first = perf_evlist__first(evsel_list);
336
337 list_for_each_entry(counter, &evsel_list->entries, node) {
338 if (create_perf_stat_counter(counter, first) < 0) {
339 /*
340 * PPC returns ENXIO for HW counters until 2.6.37
341 * (behavior changed with commit b0a873e).
342 */
343 if (errno == EINVAL || errno == ENOSYS ||
344 errno == ENOENT || errno == EOPNOTSUPP ||
345 errno == ENXIO) {
346 if (verbose)
347 ui__warning("%s event is not supported by the kernel.\n",
348 perf_evsel__name(counter));
349 counter->supported = false;
350 continue;
351 }
352
353 if (errno == EPERM || errno == EACCES) {
354 error("You may not have permission to collect %sstats.\n"
355 "\t Consider tweaking"
356 " /proc/sys/kernel/perf_event_paranoid or running as root.",
357 target.system_wide ? "system-wide " : "");
358 } else {
359 error("open_counter returned with %d (%s). "
360 "/bin/dmesg may provide additional information.\n",
361 errno, strerror(errno));
362 }
363 if (child_pid != -1)
364 kill(child_pid, SIGTERM);
365
366 pr_err("Not all events could be opened.\n");
367 return -1;
368 }
369 counter->supported = true;
370 }
371
372 if (perf_evlist__apply_filters(evsel_list)) {
373 error("failed to set filter with %d (%s)\n", errno,
374 strerror(errno));
375 return -1;
376 }
377
378 /*
379 * Enable counters and exec the command:
380 */
381 t0 = rdclock();
382
383 if (forks) {
384 close(go_pipe[1]);
385 wait(&status);
386 if (WIFSIGNALED(status))
387 psignal(WTERMSIG(status), argv[0]);
388 } else {
389 while(!done) sleep(1);
390 }
391
392 t1 = rdclock();
393
394 update_stats(&walltime_nsecs_stats, t1 - t0);
395
396 if (no_aggr) {
397 list_for_each_entry(counter, &evsel_list->entries, node) {
398 read_counter(counter);
399 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
400 }
401 } else {
402 list_for_each_entry(counter, &evsel_list->entries, node) {
403 read_counter_aggr(counter);
404 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
405 evsel_list->threads->nr);
406 }
407 }
408
409 return WEXITSTATUS(status);
410 }
411
412 static int run_perf_stat(int argc __maybe_unused, const char **argv)
413 {
414 int ret;
415
416 if (pre_cmd) {
417 ret = system(pre_cmd);
418 if (ret)
419 return ret;
420 }
421
422 if (sync_run)
423 sync();
424
425 ret = __run_perf_stat(argc, argv);
426 if (ret)
427 return ret;
428
429 if (post_cmd) {
430 ret = system(post_cmd);
431 if (ret)
432 return ret;
433 }
434
435 return ret;
436 }
437
438 static void print_noise_pct(double total, double avg)
439 {
440 double pct = rel_stddev_stats(total, avg);
441
442 if (csv_output)
443 fprintf(output, "%s%.2f%%", csv_sep, pct);
444 else if (pct)
445 fprintf(output, " ( +-%6.2f%% )", pct);
446 }
447
448 static void print_noise(struct perf_evsel *evsel, double avg)
449 {
450 struct perf_stat *ps;
451
452 if (run_count == 1)
453 return;
454
455 ps = evsel->priv;
456 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
457 }
458
459 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
460 {
461 double msecs = avg / 1e6;
462 char cpustr[16] = { '\0', };
463 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
464
465 if (no_aggr)
466 sprintf(cpustr, "CPU%*d%s",
467 csv_output ? 0 : -4,
468 perf_evsel__cpus(evsel)->map[cpu], csv_sep);
469
470 fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
471
472 if (evsel->cgrp)
473 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
474
475 if (csv_output)
476 return;
477
478 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
479 fprintf(output, " # %8.3f CPUs utilized ",
480 avg / avg_stats(&walltime_nsecs_stats));
481 else
482 fprintf(output, " ");
483 }
484
485 /* used for get_ratio_color() */
486 enum grc_type {
487 GRC_STALLED_CYCLES_FE,
488 GRC_STALLED_CYCLES_BE,
489 GRC_CACHE_MISSES,
490 GRC_MAX_NR
491 };
492
493 static const char *get_ratio_color(enum grc_type type, double ratio)
494 {
495 static const double grc_table[GRC_MAX_NR][3] = {
496 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
497 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
498 [GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 },
499 };
500 const char *color = PERF_COLOR_NORMAL;
501
502 if (ratio > grc_table[type][0])
503 color = PERF_COLOR_RED;
504 else if (ratio > grc_table[type][1])
505 color = PERF_COLOR_MAGENTA;
506 else if (ratio > grc_table[type][2])
507 color = PERF_COLOR_YELLOW;
508
509 return color;
510 }
511
512 static void print_stalled_cycles_frontend(int cpu,
513 struct perf_evsel *evsel
514 __maybe_unused, double avg)
515 {
516 double total, ratio = 0.0;
517 const char *color;
518
519 total = avg_stats(&runtime_cycles_stats[cpu]);
520
521 if (total)
522 ratio = avg / total * 100.0;
523
524 color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
525
526 fprintf(output, " # ");
527 color_fprintf(output, color, "%6.2f%%", ratio);
528 fprintf(output, " frontend cycles idle ");
529 }
530
531 static void print_stalled_cycles_backend(int cpu,
532 struct perf_evsel *evsel
533 __maybe_unused, double avg)
534 {
535 double total, ratio = 0.0;
536 const char *color;
537
538 total = avg_stats(&runtime_cycles_stats[cpu]);
539
540 if (total)
541 ratio = avg / total * 100.0;
542
543 color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
544
545 fprintf(output, " # ");
546 color_fprintf(output, color, "%6.2f%%", ratio);
547 fprintf(output, " backend cycles idle ");
548 }
549
550 static void print_branch_misses(int cpu,
551 struct perf_evsel *evsel __maybe_unused,
552 double avg)
553 {
554 double total, ratio = 0.0;
555 const char *color;
556
557 total = avg_stats(&runtime_branches_stats[cpu]);
558
559 if (total)
560 ratio = avg / total * 100.0;
561
562 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
563
564 fprintf(output, " # ");
565 color_fprintf(output, color, "%6.2f%%", ratio);
566 fprintf(output, " of all branches ");
567 }
568
569 static void print_l1_dcache_misses(int cpu,
570 struct perf_evsel *evsel __maybe_unused,
571 double avg)
572 {
573 double total, ratio = 0.0;
574 const char *color;
575
576 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
577
578 if (total)
579 ratio = avg / total * 100.0;
580
581 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
582
583 fprintf(output, " # ");
584 color_fprintf(output, color, "%6.2f%%", ratio);
585 fprintf(output, " of all L1-dcache hits ");
586 }
587
588 static void print_l1_icache_misses(int cpu,
589 struct perf_evsel *evsel __maybe_unused,
590 double avg)
591 {
592 double total, ratio = 0.0;
593 const char *color;
594
595 total = avg_stats(&runtime_l1_icache_stats[cpu]);
596
597 if (total)
598 ratio = avg / total * 100.0;
599
600 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
601
602 fprintf(output, " # ");
603 color_fprintf(output, color, "%6.2f%%", ratio);
604 fprintf(output, " of all L1-icache hits ");
605 }
606
607 static void print_dtlb_cache_misses(int cpu,
608 struct perf_evsel *evsel __maybe_unused,
609 double avg)
610 {
611 double total, ratio = 0.0;
612 const char *color;
613
614 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
615
616 if (total)
617 ratio = avg / total * 100.0;
618
619 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
620
621 fprintf(output, " # ");
622 color_fprintf(output, color, "%6.2f%%", ratio);
623 fprintf(output, " of all dTLB cache hits ");
624 }
625
626 static void print_itlb_cache_misses(int cpu,
627 struct perf_evsel *evsel __maybe_unused,
628 double avg)
629 {
630 double total, ratio = 0.0;
631 const char *color;
632
633 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
634
635 if (total)
636 ratio = avg / total * 100.0;
637
638 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
639
640 fprintf(output, " # ");
641 color_fprintf(output, color, "%6.2f%%", ratio);
642 fprintf(output, " of all iTLB cache hits ");
643 }
644
645 static void print_ll_cache_misses(int cpu,
646 struct perf_evsel *evsel __maybe_unused,
647 double avg)
648 {
649 double total, ratio = 0.0;
650 const char *color;
651
652 total = avg_stats(&runtime_ll_cache_stats[cpu]);
653
654 if (total)
655 ratio = avg / total * 100.0;
656
657 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
658
659 fprintf(output, " # ");
660 color_fprintf(output, color, "%6.2f%%", ratio);
661 fprintf(output, " of all LL-cache hits ");
662 }
663
664 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
665 {
666 double total, ratio = 0.0;
667 char cpustr[16] = { '\0', };
668 const char *fmt;
669
670 if (csv_output)
671 fmt = "%s%.0f%s%s";
672 else if (big_num)
673 fmt = "%s%'18.0f%s%-25s";
674 else
675 fmt = "%s%18.0f%s%-25s";
676
677 if (no_aggr)
678 sprintf(cpustr, "CPU%*d%s",
679 csv_output ? 0 : -4,
680 perf_evsel__cpus(evsel)->map[cpu], csv_sep);
681 else
682 cpu = 0;
683
684 fprintf(output, fmt, cpustr, avg, csv_sep, perf_evsel__name(evsel));
685
686 if (evsel->cgrp)
687 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
688
689 if (csv_output)
690 return;
691
692 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
693 total = avg_stats(&runtime_cycles_stats[cpu]);
694
695 if (total)
696 ratio = avg / total;
697
698 fprintf(output, " # %5.2f insns per cycle ", ratio);
699
700 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
701 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
702
703 if (total && avg) {
704 ratio = total / avg;
705 fprintf(output, "\n # %5.2f stalled cycles per insn", ratio);
706 }
707
708 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
709 runtime_branches_stats[cpu].n != 0) {
710 print_branch_misses(cpu, evsel, avg);
711 } else if (
712 evsel->attr.type == PERF_TYPE_HW_CACHE &&
713 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
714 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
715 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
716 runtime_l1_dcache_stats[cpu].n != 0) {
717 print_l1_dcache_misses(cpu, evsel, avg);
718 } else if (
719 evsel->attr.type == PERF_TYPE_HW_CACHE &&
720 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
721 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
722 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
723 runtime_l1_icache_stats[cpu].n != 0) {
724 print_l1_icache_misses(cpu, evsel, avg);
725 } else if (
726 evsel->attr.type == PERF_TYPE_HW_CACHE &&
727 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
728 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
729 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
730 runtime_dtlb_cache_stats[cpu].n != 0) {
731 print_dtlb_cache_misses(cpu, evsel, avg);
732 } else if (
733 evsel->attr.type == PERF_TYPE_HW_CACHE &&
734 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
735 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
736 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
737 runtime_itlb_cache_stats[cpu].n != 0) {
738 print_itlb_cache_misses(cpu, evsel, avg);
739 } else if (
740 evsel->attr.type == PERF_TYPE_HW_CACHE &&
741 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
742 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
743 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
744 runtime_ll_cache_stats[cpu].n != 0) {
745 print_ll_cache_misses(cpu, evsel, avg);
746 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
747 runtime_cacherefs_stats[cpu].n != 0) {
748 total = avg_stats(&runtime_cacherefs_stats[cpu]);
749
750 if (total)
751 ratio = avg * 100 / total;
752
753 fprintf(output, " # %8.3f %% of all cache refs ", ratio);
754
755 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
756 print_stalled_cycles_frontend(cpu, evsel, avg);
757 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
758 print_stalled_cycles_backend(cpu, evsel, avg);
759 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
760 total = avg_stats(&runtime_nsecs_stats[cpu]);
761
762 if (total)
763 ratio = 1.0 * avg / total;
764
765 fprintf(output, " # %8.3f GHz ", ratio);
766 } else if (runtime_nsecs_stats[cpu].n != 0) {
767 char unit = 'M';
768
769 total = avg_stats(&runtime_nsecs_stats[cpu]);
770
771 if (total)
772 ratio = 1000.0 * avg / total;
773 if (ratio < 0.001) {
774 ratio *= 1000;
775 unit = 'K';
776 }
777
778 fprintf(output, " # %8.3f %c/sec ", ratio, unit);
779 } else {
780 fprintf(output, " ");
781 }
782 }
783
784 /*
785 * Print out the results of a single counter:
786 * aggregated counts in system-wide mode
787 */
788 static void print_counter_aggr(struct perf_evsel *counter)
789 {
790 struct perf_stat *ps = counter->priv;
791 double avg = avg_stats(&ps->res_stats[0]);
792 int scaled = counter->counts->scaled;
793
794 if (scaled == -1) {
795 fprintf(output, "%*s%s%*s",
796 csv_output ? 0 : 18,
797 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
798 csv_sep,
799 csv_output ? 0 : -24,
800 perf_evsel__name(counter));
801
802 if (counter->cgrp)
803 fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
804
805 fputc('\n', output);
806 return;
807 }
808
809 if (nsec_counter(counter))
810 nsec_printout(-1, counter, avg);
811 else
812 abs_printout(-1, counter, avg);
813
814 print_noise(counter, avg);
815
816 if (csv_output) {
817 fputc('\n', output);
818 return;
819 }
820
821 if (scaled) {
822 double avg_enabled, avg_running;
823
824 avg_enabled = avg_stats(&ps->res_stats[1]);
825 avg_running = avg_stats(&ps->res_stats[2]);
826
827 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
828 }
829 fprintf(output, "\n");
830 }
831
832 /*
833 * Print out the results of a single counter:
834 * does not use aggregated count in system-wide
835 */
836 static void print_counter(struct perf_evsel *counter)
837 {
838 u64 ena, run, val;
839 int cpu;
840
841 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
842 val = counter->counts->cpu[cpu].val;
843 ena = counter->counts->cpu[cpu].ena;
844 run = counter->counts->cpu[cpu].run;
845 if (run == 0 || ena == 0) {
846 fprintf(output, "CPU%*d%s%*s%s%*s",
847 csv_output ? 0 : -4,
848 perf_evsel__cpus(counter)->map[cpu], csv_sep,
849 csv_output ? 0 : 18,
850 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
851 csv_sep,
852 csv_output ? 0 : -24,
853 perf_evsel__name(counter));
854
855 if (counter->cgrp)
856 fprintf(output, "%s%s",
857 csv_sep, counter->cgrp->name);
858
859 fputc('\n', output);
860 continue;
861 }
862
863 if (nsec_counter(counter))
864 nsec_printout(cpu, counter, val);
865 else
866 abs_printout(cpu, counter, val);
867
868 if (!csv_output) {
869 print_noise(counter, 1.0);
870
871 if (run != ena)
872 fprintf(output, " (%.2f%%)",
873 100.0 * run / ena);
874 }
875 fputc('\n', output);
876 }
877 }
878
879 static void print_stat(int argc, const char **argv)
880 {
881 struct perf_evsel *counter;
882 int i;
883
884 fflush(stdout);
885
886 if (!csv_output) {
887 fprintf(output, "\n");
888 fprintf(output, " Performance counter stats for ");
889 if (!perf_target__has_task(&target)) {
890 fprintf(output, "\'%s", argv[0]);
891 for (i = 1; i < argc; i++)
892 fprintf(output, " %s", argv[i]);
893 } else if (target.pid)
894 fprintf(output, "process id \'%s", target.pid);
895 else
896 fprintf(output, "thread id \'%s", target.tid);
897
898 fprintf(output, "\'");
899 if (run_count > 1)
900 fprintf(output, " (%d runs)", run_count);
901 fprintf(output, ":\n\n");
902 }
903
904 if (no_aggr) {
905 list_for_each_entry(counter, &evsel_list->entries, node)
906 print_counter(counter);
907 } else {
908 list_for_each_entry(counter, &evsel_list->entries, node)
909 print_counter_aggr(counter);
910 }
911
912 if (!csv_output) {
913 if (!null_run)
914 fprintf(output, "\n");
915 fprintf(output, " %17.9f seconds time elapsed",
916 avg_stats(&walltime_nsecs_stats)/1e9);
917 if (run_count > 1) {
918 fprintf(output, " ");
919 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
920 avg_stats(&walltime_nsecs_stats));
921 }
922 fprintf(output, "\n\n");
923 }
924 }
925
926 static volatile int signr = -1;
927
928 static void skip_signal(int signo)
929 {
930 if(child_pid == -1)
931 done = 1;
932
933 signr = signo;
934 }
935
936 static void sig_atexit(void)
937 {
938 if (child_pid != -1)
939 kill(child_pid, SIGTERM);
940
941 if (signr == -1)
942 return;
943
944 signal(signr, SIG_DFL);
945 kill(getpid(), signr);
946 }
947
948 static int stat__set_big_num(const struct option *opt __maybe_unused,
949 const char *s __maybe_unused, int unset)
950 {
951 big_num_opt = unset ? 0 : 1;
952 return 0;
953 }
954
955 /*
956 * Add default attributes, if there were no attributes specified or
957 * if -d/--detailed, -d -d or -d -d -d is used:
958 */
959 static int add_default_attributes(void)
960 {
961 struct perf_event_attr default_attrs[] = {
962
963 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
964 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
965 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
966 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
967
968 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
969 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
970 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
971 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
972 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
973 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
974
975 };
976
977 /*
978 * Detailed stats (-d), covering the L1 and last level data caches:
979 */
980 struct perf_event_attr detailed_attrs[] = {
981
982 { .type = PERF_TYPE_HW_CACHE,
983 .config =
984 PERF_COUNT_HW_CACHE_L1D << 0 |
985 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
986 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
987
988 { .type = PERF_TYPE_HW_CACHE,
989 .config =
990 PERF_COUNT_HW_CACHE_L1D << 0 |
991 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
992 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
993
994 { .type = PERF_TYPE_HW_CACHE,
995 .config =
996 PERF_COUNT_HW_CACHE_LL << 0 |
997 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
998 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
999
1000 { .type = PERF_TYPE_HW_CACHE,
1001 .config =
1002 PERF_COUNT_HW_CACHE_LL << 0 |
1003 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1004 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1005 };
1006
1007 /*
1008 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1009 */
1010 struct perf_event_attr very_detailed_attrs[] = {
1011
1012 { .type = PERF_TYPE_HW_CACHE,
1013 .config =
1014 PERF_COUNT_HW_CACHE_L1I << 0 |
1015 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1016 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1017
1018 { .type = PERF_TYPE_HW_CACHE,
1019 .config =
1020 PERF_COUNT_HW_CACHE_L1I << 0 |
1021 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1022 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1023
1024 { .type = PERF_TYPE_HW_CACHE,
1025 .config =
1026 PERF_COUNT_HW_CACHE_DTLB << 0 |
1027 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1028 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1029
1030 { .type = PERF_TYPE_HW_CACHE,
1031 .config =
1032 PERF_COUNT_HW_CACHE_DTLB << 0 |
1033 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1034 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1035
1036 { .type = PERF_TYPE_HW_CACHE,
1037 .config =
1038 PERF_COUNT_HW_CACHE_ITLB << 0 |
1039 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1040 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1041
1042 { .type = PERF_TYPE_HW_CACHE,
1043 .config =
1044 PERF_COUNT_HW_CACHE_ITLB << 0 |
1045 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1046 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1047
1048 };
1049
1050 /*
1051 * Very, very detailed stats (-d -d -d), adding prefetch events:
1052 */
1053 struct perf_event_attr very_very_detailed_attrs[] = {
1054
1055 { .type = PERF_TYPE_HW_CACHE,
1056 .config =
1057 PERF_COUNT_HW_CACHE_L1D << 0 |
1058 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1059 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1060
1061 { .type = PERF_TYPE_HW_CACHE,
1062 .config =
1063 PERF_COUNT_HW_CACHE_L1D << 0 |
1064 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1065 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1066 };
1067
1068 /* Set attrs if no event is selected and !null_run: */
1069 if (null_run)
1070 return 0;
1071
1072 if (!evsel_list->nr_entries) {
1073 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1074 return -1;
1075 }
1076
1077 /* Detailed events get appended to the event list: */
1078
1079 if (detailed_run < 1)
1080 return 0;
1081
1082 /* Append detailed run extra attributes: */
1083 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1084 return -1;
1085
1086 if (detailed_run < 2)
1087 return 0;
1088
1089 /* Append very detailed run extra attributes: */
1090 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1091 return -1;
1092
1093 if (detailed_run < 3)
1094 return 0;
1095
1096 /* Append very, very detailed run extra attributes: */
1097 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1098 }
1099
1100 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1101 {
1102 bool append_file = false;
1103 int output_fd = 0;
1104 const char *output_name = NULL;
1105 const struct option options[] = {
1106 OPT_CALLBACK('e', "event", &evsel_list, "event",
1107 "event selector. use 'perf list' to list available events",
1108 parse_events_option),
1109 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1110 "event filter", parse_filter),
1111 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1112 "child tasks do not inherit counters"),
1113 OPT_STRING('p', "pid", &target.pid, "pid",
1114 "stat events on existing process id"),
1115 OPT_STRING('t', "tid", &target.tid, "tid",
1116 "stat events on existing thread id"),
1117 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1118 "system-wide collection from all CPUs"),
1119 OPT_BOOLEAN('g', "group", &group,
1120 "put the counters into a counter group"),
1121 OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1122 OPT_INCR('v', "verbose", &verbose,
1123 "be more verbose (show counter open errors, etc)"),
1124 OPT_INTEGER('r', "repeat", &run_count,
1125 "repeat command and print average + stddev (max: 100)"),
1126 OPT_BOOLEAN('n', "null", &null_run,
1127 "null run - dont start any counters"),
1128 OPT_INCR('d', "detailed", &detailed_run,
1129 "detailed run - start a lot of events"),
1130 OPT_BOOLEAN('S', "sync", &sync_run,
1131 "call sync() before starting a run"),
1132 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1133 "print large numbers with thousands\' separators",
1134 stat__set_big_num),
1135 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1136 "list of cpus to monitor in system-wide"),
1137 OPT_BOOLEAN('A', "no-aggr", &no_aggr, "disable CPU count aggregation"),
1138 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1139 "print counts with custom separator"),
1140 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1141 "monitor event in cgroup name only", parse_cgroups),
1142 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1143 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1144 OPT_INTEGER(0, "log-fd", &output_fd,
1145 "log output to fd, instead of stderr"),
1146 OPT_STRING(0, "pre", &pre_cmd, "command",
1147 "command to run prior to the measured command"),
1148 OPT_STRING(0, "post", &post_cmd, "command",
1149 "command to run after to the measured command"),
1150 OPT_END()
1151 };
1152 const char * const stat_usage[] = {
1153 "perf stat [<options>] [<command>]",
1154 NULL
1155 };
1156 struct perf_evsel *pos;
1157 int status = -ENOMEM, run_idx;
1158 const char *mode;
1159
1160 setlocale(LC_ALL, "");
1161
1162 evsel_list = perf_evlist__new(NULL, NULL);
1163 if (evsel_list == NULL)
1164 return -ENOMEM;
1165
1166 argc = parse_options(argc, argv, options, stat_usage,
1167 PARSE_OPT_STOP_AT_NON_OPTION);
1168
1169 output = stderr;
1170 if (output_name && strcmp(output_name, "-"))
1171 output = NULL;
1172
1173 if (output_name && output_fd) {
1174 fprintf(stderr, "cannot use both --output and --log-fd\n");
1175 usage_with_options(stat_usage, options);
1176 }
1177
1178 if (output_fd < 0) {
1179 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1180 usage_with_options(stat_usage, options);
1181 }
1182
1183 if (!output) {
1184 struct timespec tm;
1185 mode = append_file ? "a" : "w";
1186
1187 output = fopen(output_name, mode);
1188 if (!output) {
1189 perror("failed to create output file");
1190 return -1;
1191 }
1192 clock_gettime(CLOCK_REALTIME, &tm);
1193 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1194 } else if (output_fd > 0) {
1195 mode = append_file ? "a" : "w";
1196 output = fdopen(output_fd, mode);
1197 if (!output) {
1198 perror("Failed opening logfd");
1199 return -errno;
1200 }
1201 }
1202
1203 if (csv_sep) {
1204 csv_output = true;
1205 if (!strcmp(csv_sep, "\\t"))
1206 csv_sep = "\t";
1207 } else
1208 csv_sep = DEFAULT_SEPARATOR;
1209
1210 /*
1211 * let the spreadsheet do the pretty-printing
1212 */
1213 if (csv_output) {
1214 /* User explicitly passed -B? */
1215 if (big_num_opt == 1) {
1216 fprintf(stderr, "-B option not supported with -x\n");
1217 usage_with_options(stat_usage, options);
1218 } else /* Nope, so disable big number formatting */
1219 big_num = false;
1220 } else if (big_num_opt == 0) /* User passed --no-big-num */
1221 big_num = false;
1222
1223 if (!argc && !perf_target__has_task(&target))
1224 usage_with_options(stat_usage, options);
1225 if (run_count <= 0)
1226 usage_with_options(stat_usage, options);
1227
1228 /* no_aggr, cgroup are for system-wide only */
1229 if ((no_aggr || nr_cgroups) && !perf_target__has_cpu(&target)) {
1230 fprintf(stderr, "both cgroup and no-aggregation "
1231 "modes only available in system-wide mode\n");
1232
1233 usage_with_options(stat_usage, options);
1234 }
1235
1236 if (add_default_attributes())
1237 goto out;
1238
1239 perf_target__validate(&target);
1240
1241 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1242 if (perf_target__has_task(&target))
1243 pr_err("Problems finding threads of monitor\n");
1244 if (perf_target__has_cpu(&target))
1245 perror("failed to parse CPUs map");
1246
1247 usage_with_options(stat_usage, options);
1248 return -1;
1249 }
1250
1251 list_for_each_entry(pos, &evsel_list->entries, node) {
1252 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1253 perf_evsel__alloc_counts(pos, perf_evsel__nr_cpus(pos)) < 0)
1254 goto out_free_fd;
1255 }
1256
1257 /*
1258 * We dont want to block the signals - that would cause
1259 * child tasks to inherit that and Ctrl-C would not work.
1260 * What we want is for Ctrl-C to work in the exec()-ed
1261 * task, but being ignored by perf stat itself:
1262 */
1263 atexit(sig_atexit);
1264 signal(SIGINT, skip_signal);
1265 signal(SIGALRM, skip_signal);
1266 signal(SIGABRT, skip_signal);
1267
1268 status = 0;
1269 for (run_idx = 0; run_idx < run_count; run_idx++) {
1270 if (run_count != 1 && verbose)
1271 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1272 run_idx + 1);
1273
1274 status = run_perf_stat(argc, argv);
1275 }
1276
1277 if (status != -1)
1278 print_stat(argc, argv);
1279 out_free_fd:
1280 list_for_each_entry(pos, &evsel_list->entries, node)
1281 perf_evsel__free_stat_priv(pos);
1282 perf_evlist__delete_maps(evsel_list);
1283 out:
1284 perf_evlist__delete(evsel_list);
1285 return status;
1286 }
Linus' kernel tree