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ttm: don't destroy old mm_node on memcpy failure
[linux-2.6/libata-dev.git] / tools / perf / builtin-stat.c
blobc247faca7127c19e2ab7eae99be56310a35c7bb1
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 {
134 struct perf_event_attr *attr = &evsel->attr;
135 bool exclude_guest_missing = false;
136 int ret;
137
138 if (scale)
139 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
140 PERF_FORMAT_TOTAL_TIME_RUNNING;
141
142 attr->inherit = !no_inherit;
143
144 retry:
145 if (exclude_guest_missing)
146 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
147
148 if (perf_target__has_cpu(&target)) {
149 ret = perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
150 if (ret)
151 goto check_ret;
152 return 0;
153 }
154
155 if (!perf_target__has_task(&target) &&
156 !perf_evsel__is_group_member(evsel)) {
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;
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 list_for_each_entry(counter, &evsel_list->entries, node) {
336 if (create_perf_stat_counter(counter) < 0) {
337 /*
338 * PPC returns ENXIO for HW counters until 2.6.37
339 * (behavior changed with commit b0a873e).
340 */
341 if (errno == EINVAL || errno == ENOSYS ||
342 errno == ENOENT || errno == EOPNOTSUPP ||
343 errno == ENXIO) {
344 if (verbose)
345 ui__warning("%s event is not supported by the kernel.\n",
346 perf_evsel__name(counter));
347 counter->supported = false;
348 continue;
349 }
350
351 if (errno == EPERM || errno == EACCES) {
352 error("You may not have permission to collect %sstats.\n"
353 "\t Consider tweaking"
354 " /proc/sys/kernel/perf_event_paranoid or running as root.",
355 target.system_wide ? "system-wide " : "");
356 } else {
357 error("open_counter returned with %d (%s). "
358 "/bin/dmesg may provide additional information.\n",
359 errno, strerror(errno));
360 }
361 if (child_pid != -1)
362 kill(child_pid, SIGTERM);
363
364 pr_err("Not all events could be opened.\n");
365 return -1;
366 }
367 counter->supported = true;
368 }
369
370 if (perf_evlist__apply_filters(evsel_list)) {
371 error("failed to set filter with %d (%s)\n", errno,
372 strerror(errno));
373 return -1;
374 }
375
376 /*
377 * Enable counters and exec the command:
378 */
379 t0 = rdclock();
380
381 if (forks) {
382 close(go_pipe[1]);
383 wait(&status);
384 if (WIFSIGNALED(status))
385 psignal(WTERMSIG(status), argv[0]);
386 } else {
387 while(!done) sleep(1);
388 }
389
390 t1 = rdclock();
391
392 update_stats(&walltime_nsecs_stats, t1 - t0);
393
394 if (no_aggr) {
395 list_for_each_entry(counter, &evsel_list->entries, node) {
396 read_counter(counter);
397 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
398 }
399 } else {
400 list_for_each_entry(counter, &evsel_list->entries, node) {
401 read_counter_aggr(counter);
402 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
403 evsel_list->threads->nr);
404 }
405 }
406
407 return WEXITSTATUS(status);
408 }
409
410 static int run_perf_stat(int argc __maybe_unused, const char **argv)
411 {
412 int ret;
413
414 if (pre_cmd) {
415 ret = system(pre_cmd);
416 if (ret)
417 return ret;
418 }
419
420 if (sync_run)
421 sync();
422
423 ret = __run_perf_stat(argc, argv);
424 if (ret)
425 return ret;
426
427 if (post_cmd) {
428 ret = system(post_cmd);
429 if (ret)
430 return ret;
431 }
432
433 return ret;
434 }
435
436 static void print_noise_pct(double total, double avg)
437 {
438 double pct = rel_stddev_stats(total, avg);
439
440 if (csv_output)
441 fprintf(output, "%s%.2f%%", csv_sep, pct);
442 else if (pct)
443 fprintf(output, " ( +-%6.2f%% )", pct);
444 }
445
446 static void print_noise(struct perf_evsel *evsel, double avg)
447 {
448 struct perf_stat *ps;
449
450 if (run_count == 1)
451 return;
452
453 ps = evsel->priv;
454 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
455 }
456
457 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
458 {
459 double msecs = avg / 1e6;
460 char cpustr[16] = { '\0', };
461 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
462
463 if (no_aggr)
464 sprintf(cpustr, "CPU%*d%s",
465 csv_output ? 0 : -4,
466 perf_evsel__cpus(evsel)->map[cpu], csv_sep);
467
468 fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
469
470 if (evsel->cgrp)
471 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
472
473 if (csv_output)
474 return;
475
476 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
477 fprintf(output, " # %8.3f CPUs utilized ",
478 avg / avg_stats(&walltime_nsecs_stats));
479 else
480 fprintf(output, " ");
481 }
482
483 /* used for get_ratio_color() */
484 enum grc_type {
485 GRC_STALLED_CYCLES_FE,
486 GRC_STALLED_CYCLES_BE,
487 GRC_CACHE_MISSES,
488 GRC_MAX_NR
489 };
490
491 static const char *get_ratio_color(enum grc_type type, double ratio)
492 {
493 static const double grc_table[GRC_MAX_NR][3] = {
494 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
495 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
496 [GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 },
497 };
498 const char *color = PERF_COLOR_NORMAL;
499
500 if (ratio > grc_table[type][0])
501 color = PERF_COLOR_RED;
502 else if (ratio > grc_table[type][1])
503 color = PERF_COLOR_MAGENTA;
504 else if (ratio > grc_table[type][2])
505 color = PERF_COLOR_YELLOW;
506
507 return color;
508 }
509
510 static void print_stalled_cycles_frontend(int cpu,
511 struct perf_evsel *evsel
512 __maybe_unused, double avg)
513 {
514 double total, ratio = 0.0;
515 const char *color;
516
517 total = avg_stats(&runtime_cycles_stats[cpu]);
518
519 if (total)
520 ratio = avg / total * 100.0;
521
522 color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
523
524 fprintf(output, " # ");
525 color_fprintf(output, color, "%6.2f%%", ratio);
526 fprintf(output, " frontend cycles idle ");
527 }
528
529 static void print_stalled_cycles_backend(int cpu,
530 struct perf_evsel *evsel
531 __maybe_unused, double avg)
532 {
533 double total, ratio = 0.0;
534 const char *color;
535
536 total = avg_stats(&runtime_cycles_stats[cpu]);
537
538 if (total)
539 ratio = avg / total * 100.0;
540
541 color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
542
543 fprintf(output, " # ");
544 color_fprintf(output, color, "%6.2f%%", ratio);
545 fprintf(output, " backend cycles idle ");
546 }
547
548 static void print_branch_misses(int cpu,
549 struct perf_evsel *evsel __maybe_unused,
550 double avg)
551 {
552 double total, ratio = 0.0;
553 const char *color;
554
555 total = avg_stats(&runtime_branches_stats[cpu]);
556
557 if (total)
558 ratio = avg / total * 100.0;
559
560 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
561
562 fprintf(output, " # ");
563 color_fprintf(output, color, "%6.2f%%", ratio);
564 fprintf(output, " of all branches ");
565 }
566
567 static void print_l1_dcache_misses(int cpu,
568 struct perf_evsel *evsel __maybe_unused,
569 double avg)
570 {
571 double total, ratio = 0.0;
572 const char *color;
573
574 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
575
576 if (total)
577 ratio = avg / total * 100.0;
578
579 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
580
581 fprintf(output, " # ");
582 color_fprintf(output, color, "%6.2f%%", ratio);
583 fprintf(output, " of all L1-dcache hits ");
584 }
585
586 static void print_l1_icache_misses(int cpu,
587 struct perf_evsel *evsel __maybe_unused,
588 double avg)
589 {
590 double total, ratio = 0.0;
591 const char *color;
592
593 total = avg_stats(&runtime_l1_icache_stats[cpu]);
594
595 if (total)
596 ratio = avg / total * 100.0;
597
598 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
599
600 fprintf(output, " # ");
601 color_fprintf(output, color, "%6.2f%%", ratio);
602 fprintf(output, " of all L1-icache hits ");
603 }
604
605 static void print_dtlb_cache_misses(int cpu,
606 struct perf_evsel *evsel __maybe_unused,
607 double avg)
608 {
609 double total, ratio = 0.0;
610 const char *color;
611
612 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
613
614 if (total)
615 ratio = avg / total * 100.0;
616
617 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
618
619 fprintf(output, " # ");
620 color_fprintf(output, color, "%6.2f%%", ratio);
621 fprintf(output, " of all dTLB cache hits ");
622 }
623
624 static void print_itlb_cache_misses(int cpu,
625 struct perf_evsel *evsel __maybe_unused,
626 double avg)
627 {
628 double total, ratio = 0.0;
629 const char *color;
630
631 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
632
633 if (total)
634 ratio = avg / total * 100.0;
635
636 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
637
638 fprintf(output, " # ");
639 color_fprintf(output, color, "%6.2f%%", ratio);
640 fprintf(output, " of all iTLB cache hits ");
641 }
642
643 static void print_ll_cache_misses(int cpu,
644 struct perf_evsel *evsel __maybe_unused,
645 double avg)
646 {
647 double total, ratio = 0.0;
648 const char *color;
649
650 total = avg_stats(&runtime_ll_cache_stats[cpu]);
651
652 if (total)
653 ratio = avg / total * 100.0;
654
655 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
656
657 fprintf(output, " # ");
658 color_fprintf(output, color, "%6.2f%%", ratio);
659 fprintf(output, " of all LL-cache hits ");
660 }
661
662 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
663 {
664 double total, ratio = 0.0;
665 char cpustr[16] = { '\0', };
666 const char *fmt;
667
668 if (csv_output)
669 fmt = "%s%.0f%s%s";
670 else if (big_num)
671 fmt = "%s%'18.0f%s%-25s";
672 else
673 fmt = "%s%18.0f%s%-25s";
674
675 if (no_aggr)
676 sprintf(cpustr, "CPU%*d%s",
677 csv_output ? 0 : -4,
678 perf_evsel__cpus(evsel)->map[cpu], csv_sep);
679 else
680 cpu = 0;
681
682 fprintf(output, fmt, cpustr, avg, csv_sep, perf_evsel__name(evsel));
683
684 if (evsel->cgrp)
685 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
686
687 if (csv_output)
688 return;
689
690 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
691 total = avg_stats(&runtime_cycles_stats[cpu]);
692
693 if (total)
694 ratio = avg / total;
695
696 fprintf(output, " # %5.2f insns per cycle ", ratio);
697
698 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
699 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
700
701 if (total && avg) {
702 ratio = total / avg;
703 fprintf(output, "\n # %5.2f stalled cycles per insn", ratio);
704 }
705
706 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
707 runtime_branches_stats[cpu].n != 0) {
708 print_branch_misses(cpu, evsel, avg);
709 } else if (
710 evsel->attr.type == PERF_TYPE_HW_CACHE &&
711 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
712 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
713 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
714 runtime_l1_dcache_stats[cpu].n != 0) {
715 print_l1_dcache_misses(cpu, evsel, avg);
716 } else if (
717 evsel->attr.type == PERF_TYPE_HW_CACHE &&
718 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
719 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
720 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
721 runtime_l1_icache_stats[cpu].n != 0) {
722 print_l1_icache_misses(cpu, evsel, avg);
723 } else if (
724 evsel->attr.type == PERF_TYPE_HW_CACHE &&
725 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
726 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
727 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
728 runtime_dtlb_cache_stats[cpu].n != 0) {
729 print_dtlb_cache_misses(cpu, evsel, avg);
730 } else if (
731 evsel->attr.type == PERF_TYPE_HW_CACHE &&
732 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
733 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
734 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
735 runtime_itlb_cache_stats[cpu].n != 0) {
736 print_itlb_cache_misses(cpu, evsel, avg);
737 } else if (
738 evsel->attr.type == PERF_TYPE_HW_CACHE &&
739 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
740 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
741 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
742 runtime_ll_cache_stats[cpu].n != 0) {
743 print_ll_cache_misses(cpu, evsel, avg);
744 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
745 runtime_cacherefs_stats[cpu].n != 0) {
746 total = avg_stats(&runtime_cacherefs_stats[cpu]);
747
748 if (total)
749 ratio = avg * 100 / total;
750
751 fprintf(output, " # %8.3f %% of all cache refs ", ratio);
752
753 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
754 print_stalled_cycles_frontend(cpu, evsel, avg);
755 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
756 print_stalled_cycles_backend(cpu, evsel, avg);
757 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
758 total = avg_stats(&runtime_nsecs_stats[cpu]);
759
760 if (total)
761 ratio = 1.0 * avg / total;
762
763 fprintf(output, " # %8.3f GHz ", ratio);
764 } else if (runtime_nsecs_stats[cpu].n != 0) {
765 char unit = 'M';
766
767 total = avg_stats(&runtime_nsecs_stats[cpu]);
768
769 if (total)
770 ratio = 1000.0 * avg / total;
771 if (ratio < 0.001) {
772 ratio *= 1000;
773 unit = 'K';
774 }
775
776 fprintf(output, " # %8.3f %c/sec ", ratio, unit);
777 } else {
778 fprintf(output, " ");
779 }
780 }
781
782 /*
783 * Print out the results of a single counter:
784 * aggregated counts in system-wide mode
785 */
786 static void print_counter_aggr(struct perf_evsel *counter)
787 {
788 struct perf_stat *ps = counter->priv;
789 double avg = avg_stats(&ps->res_stats[0]);
790 int scaled = counter->counts->scaled;
791
792 if (scaled == -1) {
793 fprintf(output, "%*s%s%*s",
794 csv_output ? 0 : 18,
795 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
796 csv_sep,
797 csv_output ? 0 : -24,
798 perf_evsel__name(counter));
799
800 if (counter->cgrp)
801 fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
802
803 fputc('\n', output);
804 return;
805 }
806
807 if (nsec_counter(counter))
808 nsec_printout(-1, counter, avg);
809 else
810 abs_printout(-1, counter, avg);
811
812 print_noise(counter, avg);
813
814 if (csv_output) {
815 fputc('\n', output);
816 return;
817 }
818
819 if (scaled) {
820 double avg_enabled, avg_running;
821
822 avg_enabled = avg_stats(&ps->res_stats[1]);
823 avg_running = avg_stats(&ps->res_stats[2]);
824
825 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
826 }
827 fprintf(output, "\n");
828 }
829
830 /*
831 * Print out the results of a single counter:
832 * does not use aggregated count in system-wide
833 */
834 static void print_counter(struct perf_evsel *counter)
835 {
836 u64 ena, run, val;
837 int cpu;
838
839 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
840 val = counter->counts->cpu[cpu].val;
841 ena = counter->counts->cpu[cpu].ena;
842 run = counter->counts->cpu[cpu].run;
843 if (run == 0 || ena == 0) {
844 fprintf(output, "CPU%*d%s%*s%s%*s",
845 csv_output ? 0 : -4,
846 perf_evsel__cpus(counter)->map[cpu], csv_sep,
847 csv_output ? 0 : 18,
848 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
849 csv_sep,
850 csv_output ? 0 : -24,
851 perf_evsel__name(counter));
852
853 if (counter->cgrp)
854 fprintf(output, "%s%s",
855 csv_sep, counter->cgrp->name);
856
857 fputc('\n', output);
858 continue;
859 }
860
861 if (nsec_counter(counter))
862 nsec_printout(cpu, counter, val);
863 else
864 abs_printout(cpu, counter, val);
865
866 if (!csv_output) {
867 print_noise(counter, 1.0);
868
869 if (run != ena)
870 fprintf(output, " (%.2f%%)",
871 100.0 * run / ena);
872 }
873 fputc('\n', output);
874 }
875 }
876
877 static void print_stat(int argc, const char **argv)
878 {
879 struct perf_evsel *counter;
880 int i;
881
882 fflush(stdout);
883
884 if (!csv_output) {
885 fprintf(output, "\n");
886 fprintf(output, " Performance counter stats for ");
887 if (!perf_target__has_task(&target)) {
888 fprintf(output, "\'%s", argv[0]);
889 for (i = 1; i < argc; i++)
890 fprintf(output, " %s", argv[i]);
891 } else if (target.pid)
892 fprintf(output, "process id \'%s", target.pid);
893 else
894 fprintf(output, "thread id \'%s", target.tid);
895
896 fprintf(output, "\'");
897 if (run_count > 1)
898 fprintf(output, " (%d runs)", run_count);
899 fprintf(output, ":\n\n");
900 }
901
902 if (no_aggr) {
903 list_for_each_entry(counter, &evsel_list->entries, node)
904 print_counter(counter);
905 } else {
906 list_for_each_entry(counter, &evsel_list->entries, node)
907 print_counter_aggr(counter);
908 }
909
910 if (!csv_output) {
911 if (!null_run)
912 fprintf(output, "\n");
913 fprintf(output, " %17.9f seconds time elapsed",
914 avg_stats(&walltime_nsecs_stats)/1e9);
915 if (run_count > 1) {
916 fprintf(output, " ");
917 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
918 avg_stats(&walltime_nsecs_stats));
919 }
920 fprintf(output, "\n\n");
921 }
922 }
923
924 static volatile int signr = -1;
925
926 static void skip_signal(int signo)
927 {
928 if(child_pid == -1)
929 done = 1;
930
931 signr = signo;
932 }
933
934 static void sig_atexit(void)
935 {
936 if (child_pid != -1)
937 kill(child_pid, SIGTERM);
938
939 if (signr == -1)
940 return;
941
942 signal(signr, SIG_DFL);
943 kill(getpid(), signr);
944 }
945
946 static int stat__set_big_num(const struct option *opt __maybe_unused,
947 const char *s __maybe_unused, int unset)
948 {
949 big_num_opt = unset ? 0 : 1;
950 return 0;
951 }
952
953 /*
954 * Add default attributes, if there were no attributes specified or
955 * if -d/--detailed, -d -d or -d -d -d is used:
956 */
957 static int add_default_attributes(void)
958 {
959 struct perf_event_attr default_attrs[] = {
960
961 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
962 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
963 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
964 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
965
966 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
967 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
968 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
969 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
970 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
971 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
972
973 };
974
975 /*
976 * Detailed stats (-d), covering the L1 and last level data caches:
977 */
978 struct perf_event_attr detailed_attrs[] = {
979
980 { .type = PERF_TYPE_HW_CACHE,
981 .config =
982 PERF_COUNT_HW_CACHE_L1D << 0 |
983 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
984 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
985
986 { .type = PERF_TYPE_HW_CACHE,
987 .config =
988 PERF_COUNT_HW_CACHE_L1D << 0 |
989 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
990 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
991
992 { .type = PERF_TYPE_HW_CACHE,
993 .config =
994 PERF_COUNT_HW_CACHE_LL << 0 |
995 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
996 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
997
998 { .type = PERF_TYPE_HW_CACHE,
999 .config =
1000 PERF_COUNT_HW_CACHE_LL << 0 |
1001 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1002 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1003 };
1004
1005 /*
1006 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1007 */
1008 struct perf_event_attr very_detailed_attrs[] = {
1009
1010 { .type = PERF_TYPE_HW_CACHE,
1011 .config =
1012 PERF_COUNT_HW_CACHE_L1I << 0 |
1013 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1014 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1015
1016 { .type = PERF_TYPE_HW_CACHE,
1017 .config =
1018 PERF_COUNT_HW_CACHE_L1I << 0 |
1019 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1020 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1021
1022 { .type = PERF_TYPE_HW_CACHE,
1023 .config =
1024 PERF_COUNT_HW_CACHE_DTLB << 0 |
1025 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1026 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1027
1028 { .type = PERF_TYPE_HW_CACHE,
1029 .config =
1030 PERF_COUNT_HW_CACHE_DTLB << 0 |
1031 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1032 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1033
1034 { .type = PERF_TYPE_HW_CACHE,
1035 .config =
1036 PERF_COUNT_HW_CACHE_ITLB << 0 |
1037 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1038 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1039
1040 { .type = PERF_TYPE_HW_CACHE,
1041 .config =
1042 PERF_COUNT_HW_CACHE_ITLB << 0 |
1043 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1044 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1045
1046 };
1047
1048 /*
1049 * Very, very detailed stats (-d -d -d), adding prefetch events:
1050 */
1051 struct perf_event_attr very_very_detailed_attrs[] = {
1052
1053 { .type = PERF_TYPE_HW_CACHE,
1054 .config =
1055 PERF_COUNT_HW_CACHE_L1D << 0 |
1056 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1057 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1058
1059 { .type = PERF_TYPE_HW_CACHE,
1060 .config =
1061 PERF_COUNT_HW_CACHE_L1D << 0 |
1062 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1063 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1064 };
1065
1066 /* Set attrs if no event is selected and !null_run: */
1067 if (null_run)
1068 return 0;
1069
1070 if (!evsel_list->nr_entries) {
1071 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1072 return -1;
1073 }
1074
1075 /* Detailed events get appended to the event list: */
1076
1077 if (detailed_run < 1)
1078 return 0;
1079
1080 /* Append detailed run extra attributes: */
1081 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1082 return -1;
1083
1084 if (detailed_run < 2)
1085 return 0;
1086
1087 /* Append very detailed run extra attributes: */
1088 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1089 return -1;
1090
1091 if (detailed_run < 3)
1092 return 0;
1093
1094 /* Append very, very detailed run extra attributes: */
1095 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1096 }
1097
1098 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1099 {
1100 bool append_file = false;
1101 int output_fd = 0;
1102 const char *output_name = NULL;
1103 const struct option options[] = {
1104 OPT_CALLBACK('e', "event", &evsel_list, "event",
1105 "event selector. use 'perf list' to list available events",
1106 parse_events_option),
1107 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1108 "event filter", parse_filter),
1109 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1110 "child tasks do not inherit counters"),
1111 OPT_STRING('p', "pid", &target.pid, "pid",
1112 "stat events on existing process id"),
1113 OPT_STRING('t', "tid", &target.tid, "tid",
1114 "stat events on existing thread id"),
1115 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1116 "system-wide collection from all CPUs"),
1117 OPT_BOOLEAN('g', "group", &group,
1118 "put the counters into a counter group"),
1119 OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1120 OPT_INCR('v', "verbose", &verbose,
1121 "be more verbose (show counter open errors, etc)"),
1122 OPT_INTEGER('r', "repeat", &run_count,
1123 "repeat command and print average + stddev (max: 100)"),
1124 OPT_BOOLEAN('n', "null", &null_run,
1125 "null run - dont start any counters"),
1126 OPT_INCR('d', "detailed", &detailed_run,
1127 "detailed run - start a lot of events"),
1128 OPT_BOOLEAN('S', "sync", &sync_run,
1129 "call sync() before starting a run"),
1130 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1131 "print large numbers with thousands\' separators",
1132 stat__set_big_num),
1133 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1134 "list of cpus to monitor in system-wide"),
1135 OPT_BOOLEAN('A', "no-aggr", &no_aggr, "disable CPU count aggregation"),
1136 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1137 "print counts with custom separator"),
1138 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1139 "monitor event in cgroup name only", parse_cgroups),
1140 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1141 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1142 OPT_INTEGER(0, "log-fd", &output_fd,
1143 "log output to fd, instead of stderr"),
1144 OPT_STRING(0, "pre", &pre_cmd, "command",
1145 "command to run prior to the measured command"),
1146 OPT_STRING(0, "post", &post_cmd, "command",
1147 "command to run after to the measured command"),
1148 OPT_END()
1149 };
1150 const char * const stat_usage[] = {
1151 "perf stat [<options>] [<command>]",
1152 NULL
1153 };
1154 struct perf_evsel *pos;
1155 int status = -ENOMEM, run_idx;
1156 const char *mode;
1157
1158 setlocale(LC_ALL, "");
1159
1160 evsel_list = perf_evlist__new(NULL, NULL);
1161 if (evsel_list == NULL)
1162 return -ENOMEM;
1163
1164 argc = parse_options(argc, argv, options, stat_usage,
1165 PARSE_OPT_STOP_AT_NON_OPTION);
1166
1167 output = stderr;
1168 if (output_name && strcmp(output_name, "-"))
1169 output = NULL;
1170
1171 if (output_name && output_fd) {
1172 fprintf(stderr, "cannot use both --output and --log-fd\n");
1173 usage_with_options(stat_usage, options);
1174 }
1175
1176 if (output_fd < 0) {
1177 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1178 usage_with_options(stat_usage, options);
1179 }
1180
1181 if (!output) {
1182 struct timespec tm;
1183 mode = append_file ? "a" : "w";
1184
1185 output = fopen(output_name, mode);
1186 if (!output) {
1187 perror("failed to create output file");
1188 return -1;
1189 }
1190 clock_gettime(CLOCK_REALTIME, &tm);
1191 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1192 } else if (output_fd > 0) {
1193 mode = append_file ? "a" : "w";
1194 output = fdopen(output_fd, mode);
1195 if (!output) {
1196 perror("Failed opening logfd");
1197 return -errno;
1198 }
1199 }
1200
1201 if (csv_sep) {
1202 csv_output = true;
1203 if (!strcmp(csv_sep, "\\t"))
1204 csv_sep = "\t";
1205 } else
1206 csv_sep = DEFAULT_SEPARATOR;
1207
1208 /*
1209 * let the spreadsheet do the pretty-printing
1210 */
1211 if (csv_output) {
1212 /* User explicitly passed -B? */
1213 if (big_num_opt == 1) {
1214 fprintf(stderr, "-B option not supported with -x\n");
1215 usage_with_options(stat_usage, options);
1216 } else /* Nope, so disable big number formatting */
1217 big_num = false;
1218 } else if (big_num_opt == 0) /* User passed --no-big-num */
1219 big_num = false;
1220
1221 if (!argc && !perf_target__has_task(&target))
1222 usage_with_options(stat_usage, options);
1223 if (run_count <= 0)
1224 usage_with_options(stat_usage, options);
1225
1226 /* no_aggr, cgroup are for system-wide only */
1227 if ((no_aggr || nr_cgroups) && !perf_target__has_cpu(&target)) {
1228 fprintf(stderr, "both cgroup and no-aggregation "
1229 "modes only available in system-wide mode\n");
1230
1231 usage_with_options(stat_usage, options);
1232 }
1233
1234 if (add_default_attributes())
1235 goto out;
1236
1237 perf_target__validate(&target);
1238
1239 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1240 if (perf_target__has_task(&target))
1241 pr_err("Problems finding threads of monitor\n");
1242 if (perf_target__has_cpu(&target))
1243 perror("failed to parse CPUs map");
1244
1245 usage_with_options(stat_usage, options);
1246 return -1;
1247 }
1248
1249 list_for_each_entry(pos, &evsel_list->entries, node) {
1250 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1251 perf_evsel__alloc_counts(pos, perf_evsel__nr_cpus(pos)) < 0)
1252 goto out_free_fd;
1253 }
1254
1255 /*
1256 * We dont want to block the signals - that would cause
1257 * child tasks to inherit that and Ctrl-C would not work.
1258 * What we want is for Ctrl-C to work in the exec()-ed
1259 * task, but being ignored by perf stat itself:
1260 */
1261 atexit(sig_atexit);
1262 signal(SIGINT, skip_signal);
1263 signal(SIGALRM, skip_signal);
1264 signal(SIGABRT, skip_signal);
1265
1266 status = 0;
1267 for (run_idx = 0; run_idx < run_count; run_idx++) {
1268 if (run_count != 1 && verbose)
1269 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1270 run_idx + 1);
1271
1272 status = run_perf_stat(argc, argv);
1273 }
1274
1275 if (status != -1)
1276 print_stat(argc, argv);
1277 out_free_fd:
1278 list_for_each_entry(pos, &evsel_list->entries, node)
1279 perf_evsel__free_stat_priv(pos);
1280 perf_evlist__delete_maps(evsel_list);
1281 out:
1282 perf_evlist__delete(evsel_list);
1283 return status;
1284 }
Linux 2.6 libata-dev (mirror)