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Merge branch 'next/kvm' into mips-for-linux-next
[deliverable/linux.git] / tools / perf / builtin-stat.c
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 void print_stat(int argc, const char **argv);
69 static void print_counter_aggr(struct perf_evsel *counter, char *prefix);
70 static void print_counter(struct perf_evsel *counter, char *prefix);
71 static void print_aggr_socket(char *prefix);
72
73 static struct perf_evlist *evsel_list;
74
75 static struct perf_target target = {
76 .uid = UINT_MAX,
77 };
78
79 static int run_count = 1;
80 static bool no_inherit = false;
81 static bool scale = true;
82 static bool no_aggr = false;
83 static bool aggr_socket = false;
84 static pid_t child_pid = -1;
85 static bool null_run = false;
86 static int detailed_run = 0;
87 static bool big_num = true;
88 static int big_num_opt = -1;
89 static const char *csv_sep = NULL;
90 static bool csv_output = false;
91 static bool group = false;
92 static FILE *output = NULL;
93 static const char *pre_cmd = NULL;
94 static const char *post_cmd = NULL;
95 static bool sync_run = false;
96 static unsigned int interval = 0;
97 static struct timespec ref_time;
98 static struct cpu_map *sock_map;
99
100 static volatile int done = 0;
101
102 struct perf_stat {
103 struct stats res_stats[3];
104 };
105
106 static inline void diff_timespec(struct timespec *r, struct timespec *a,
107 struct timespec *b)
108 {
109 r->tv_sec = a->tv_sec - b->tv_sec;
110 if (a->tv_nsec < b->tv_nsec) {
111 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
112 r->tv_sec--;
113 } else {
114 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
115 }
116 }
117
118 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
119 {
120 return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
121 }
122
123 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
124 {
125 return perf_evsel__cpus(evsel)->nr;
126 }
127
128 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
129 {
130 evsel->priv = zalloc(sizeof(struct perf_stat));
131 return evsel->priv == NULL ? -ENOMEM : 0;
132 }
133
134 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
135 {
136 free(evsel->priv);
137 evsel->priv = NULL;
138 }
139
140 static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
141 {
142 void *addr;
143 size_t sz;
144
145 sz = sizeof(*evsel->counts) +
146 (perf_evsel__nr_cpus(evsel) * sizeof(struct perf_counts_values));
147
148 addr = zalloc(sz);
149 if (!addr)
150 return -ENOMEM;
151
152 evsel->prev_raw_counts = addr;
153
154 return 0;
155 }
156
157 static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
158 {
159 free(evsel->prev_raw_counts);
160 evsel->prev_raw_counts = NULL;
161 }
162
163 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
164 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
165 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
166 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
167 static struct stats runtime_branches_stats[MAX_NR_CPUS];
168 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
169 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
170 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
171 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
172 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
173 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
174 static struct stats walltime_nsecs_stats;
175
176 static int create_perf_stat_counter(struct perf_evsel *evsel)
177 {
178 struct perf_event_attr *attr = &evsel->attr;
179
180 if (scale)
181 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
182 PERF_FORMAT_TOTAL_TIME_RUNNING;
183
184 attr->inherit = !no_inherit;
185
186 if (perf_target__has_cpu(&target))
187 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
188
189 if (!perf_target__has_task(&target) &&
190 perf_evsel__is_group_leader(evsel)) {
191 attr->disabled = 1;
192 attr->enable_on_exec = 1;
193 }
194
195 return perf_evsel__open_per_thread(evsel, evsel_list->threads);
196 }
197
198 /*
199 * Does the counter have nsecs as a unit?
200 */
201 static inline int nsec_counter(struct perf_evsel *evsel)
202 {
203 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
204 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
205 return 1;
206
207 return 0;
208 }
209
210 /*
211 * Update various tracking values we maintain to print
212 * more semantic information such as miss/hit ratios,
213 * instruction rates, etc:
214 */
215 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
216 {
217 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
218 update_stats(&runtime_nsecs_stats[0], count[0]);
219 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
220 update_stats(&runtime_cycles_stats[0], count[0]);
221 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
222 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
223 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
224 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
225 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
226 update_stats(&runtime_branches_stats[0], count[0]);
227 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
228 update_stats(&runtime_cacherefs_stats[0], count[0]);
229 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
230 update_stats(&runtime_l1_dcache_stats[0], count[0]);
231 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
232 update_stats(&runtime_l1_icache_stats[0], count[0]);
233 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
234 update_stats(&runtime_ll_cache_stats[0], count[0]);
235 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
236 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
237 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
238 update_stats(&runtime_itlb_cache_stats[0], count[0]);
239 }
240
241 /*
242 * Read out the results of a single counter:
243 * aggregate counts across CPUs in system-wide mode
244 */
245 static int read_counter_aggr(struct perf_evsel *counter)
246 {
247 struct perf_stat *ps = counter->priv;
248 u64 *count = counter->counts->aggr.values;
249 int i;
250
251 if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
252 evsel_list->threads->nr, scale) < 0)
253 return -1;
254
255 for (i = 0; i < 3; i++)
256 update_stats(&ps->res_stats[i], count[i]);
257
258 if (verbose) {
259 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
260 perf_evsel__name(counter), count[0], count[1], count[2]);
261 }
262
263 /*
264 * Save the full runtime - to allow normalization during printout:
265 */
266 update_shadow_stats(counter, count);
267
268 return 0;
269 }
270
271 /*
272 * Read out the results of a single counter:
273 * do not aggregate counts across CPUs in system-wide mode
274 */
275 static int read_counter(struct perf_evsel *counter)
276 {
277 u64 *count;
278 int cpu;
279
280 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
281 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
282 return -1;
283
284 count = counter->counts->cpu[cpu].values;
285
286 update_shadow_stats(counter, count);
287 }
288
289 return 0;
290 }
291
292 static void print_interval(void)
293 {
294 static int num_print_interval;
295 struct perf_evsel *counter;
296 struct perf_stat *ps;
297 struct timespec ts, rs;
298 char prefix[64];
299
300 if (no_aggr) {
301 list_for_each_entry(counter, &evsel_list->entries, node) {
302 ps = counter->priv;
303 memset(ps->res_stats, 0, sizeof(ps->res_stats));
304 read_counter(counter);
305 }
306 } else {
307 list_for_each_entry(counter, &evsel_list->entries, node) {
308 ps = counter->priv;
309 memset(ps->res_stats, 0, sizeof(ps->res_stats));
310 read_counter_aggr(counter);
311 }
312 }
313 clock_gettime(CLOCK_MONOTONIC, &ts);
314 diff_timespec(&rs, &ts, &ref_time);
315 sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
316
317 if (num_print_interval == 0 && !csv_output) {
318 if (aggr_socket)
319 fprintf(output, "# time socket cpus counts events\n");
320 else if (no_aggr)
321 fprintf(output, "# time CPU counts events\n");
322 else
323 fprintf(output, "# time counts events\n");
324 }
325
326 if (++num_print_interval == 25)
327 num_print_interval = 0;
328
329 if (aggr_socket)
330 print_aggr_socket(prefix);
331 else if (no_aggr) {
332 list_for_each_entry(counter, &evsel_list->entries, node)
333 print_counter(counter, prefix);
334 } else {
335 list_for_each_entry(counter, &evsel_list->entries, node)
336 print_counter_aggr(counter, prefix);
337 }
338 }
339
340 static int __run_perf_stat(int argc __maybe_unused, const char **argv)
341 {
342 char msg[512];
343 unsigned long long t0, t1;
344 struct perf_evsel *counter;
345 struct timespec ts;
346 int status = 0;
347 int child_ready_pipe[2], go_pipe[2];
348 const bool forks = (argc > 0);
349 char buf;
350
351 if (interval) {
352 ts.tv_sec = interval / 1000;
353 ts.tv_nsec = (interval % 1000) * 1000000;
354 } else {
355 ts.tv_sec = 1;
356 ts.tv_nsec = 0;
357 }
358
359 if (aggr_socket
360 && cpu_map__build_socket_map(evsel_list->cpus, &sock_map)) {
361 perror("cannot build socket map");
362 return -1;
363 }
364
365 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
366 perror("failed to create pipes");
367 return -1;
368 }
369
370 if (forks) {
371 if ((child_pid = fork()) < 0)
372 perror("failed to fork");
373
374 if (!child_pid) {
375 close(child_ready_pipe[0]);
376 close(go_pipe[1]);
377 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
378
379 /*
380 * Do a dummy execvp to get the PLT entry resolved,
381 * so we avoid the resolver overhead on the real
382 * execvp call.
383 */
384 execvp("", (char **)argv);
385
386 /*
387 * Tell the parent we're ready to go
388 */
389 close(child_ready_pipe[1]);
390
391 /*
392 * Wait until the parent tells us to go.
393 */
394 if (read(go_pipe[0], &buf, 1) == -1)
395 perror("unable to read pipe");
396
397 execvp(argv[0], (char **)argv);
398
399 perror(argv[0]);
400 exit(-1);
401 }
402
403 if (perf_target__none(&target))
404 evsel_list->threads->map[0] = child_pid;
405
406 /*
407 * Wait for the child to be ready to exec.
408 */
409 close(child_ready_pipe[1]);
410 close(go_pipe[0]);
411 if (read(child_ready_pipe[0], &buf, 1) == -1)
412 perror("unable to read pipe");
413 close(child_ready_pipe[0]);
414 }
415
416 if (group)
417 perf_evlist__set_leader(evsel_list);
418
419 list_for_each_entry(counter, &evsel_list->entries, node) {
420 if (create_perf_stat_counter(counter) < 0) {
421 /*
422 * PPC returns ENXIO for HW counters until 2.6.37
423 * (behavior changed with commit b0a873e).
424 */
425 if (errno == EINVAL || errno == ENOSYS ||
426 errno == ENOENT || errno == EOPNOTSUPP ||
427 errno == ENXIO) {
428 if (verbose)
429 ui__warning("%s event is not supported by the kernel.\n",
430 perf_evsel__name(counter));
431 counter->supported = false;
432 continue;
433 }
434
435 perf_evsel__open_strerror(counter, &target,
436 errno, msg, sizeof(msg));
437 ui__error("%s\n", msg);
438
439 if (child_pid != -1)
440 kill(child_pid, SIGTERM);
441
442 return -1;
443 }
444 counter->supported = true;
445 }
446
447 if (perf_evlist__apply_filters(evsel_list)) {
448 error("failed to set filter with %d (%s)\n", errno,
449 strerror(errno));
450 return -1;
451 }
452
453 /*
454 * Enable counters and exec the command:
455 */
456 t0 = rdclock();
457 clock_gettime(CLOCK_MONOTONIC, &ref_time);
458
459 if (forks) {
460 close(go_pipe[1]);
461 if (interval) {
462 while (!waitpid(child_pid, &status, WNOHANG)) {
463 nanosleep(&ts, NULL);
464 print_interval();
465 }
466 }
467 wait(&status);
468 if (WIFSIGNALED(status))
469 psignal(WTERMSIG(status), argv[0]);
470 } else {
471 while (!done) {
472 nanosleep(&ts, NULL);
473 if (interval)
474 print_interval();
475 }
476 }
477
478 t1 = rdclock();
479
480 update_stats(&walltime_nsecs_stats, t1 - t0);
481
482 if (no_aggr) {
483 list_for_each_entry(counter, &evsel_list->entries, node) {
484 read_counter(counter);
485 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
486 }
487 } else {
488 list_for_each_entry(counter, &evsel_list->entries, node) {
489 read_counter_aggr(counter);
490 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
491 evsel_list->threads->nr);
492 }
493 }
494
495 return WEXITSTATUS(status);
496 }
497
498 static int run_perf_stat(int argc __maybe_unused, const char **argv)
499 {
500 int ret;
501
502 if (pre_cmd) {
503 ret = system(pre_cmd);
504 if (ret)
505 return ret;
506 }
507
508 if (sync_run)
509 sync();
510
511 ret = __run_perf_stat(argc, argv);
512 if (ret)
513 return ret;
514
515 if (post_cmd) {
516 ret = system(post_cmd);
517 if (ret)
518 return ret;
519 }
520
521 return ret;
522 }
523
524 static void print_noise_pct(double total, double avg)
525 {
526 double pct = rel_stddev_stats(total, avg);
527
528 if (csv_output)
529 fprintf(output, "%s%.2f%%", csv_sep, pct);
530 else if (pct)
531 fprintf(output, " ( +-%6.2f%% )", pct);
532 }
533
534 static void print_noise(struct perf_evsel *evsel, double avg)
535 {
536 struct perf_stat *ps;
537
538 if (run_count == 1)
539 return;
540
541 ps = evsel->priv;
542 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
543 }
544
545 static void nsec_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
546 {
547 double msecs = avg / 1e6;
548 char cpustr[16] = { '\0', };
549 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
550
551 if (aggr_socket)
552 sprintf(cpustr, "S%*d%s%*d%s",
553 csv_output ? 0 : -5,
554 cpu,
555 csv_sep,
556 csv_output ? 0 : 4,
557 nr,
558 csv_sep);
559 else if (no_aggr)
560 sprintf(cpustr, "CPU%*d%s",
561 csv_output ? 0 : -4,
562 perf_evsel__cpus(evsel)->map[cpu], csv_sep);
563
564 fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
565
566 if (evsel->cgrp)
567 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
568
569 if (csv_output || interval)
570 return;
571
572 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
573 fprintf(output, " # %8.3f CPUs utilized ",
574 avg / avg_stats(&walltime_nsecs_stats));
575 else
576 fprintf(output, " ");
577 }
578
579 /* used for get_ratio_color() */
580 enum grc_type {
581 GRC_STALLED_CYCLES_FE,
582 GRC_STALLED_CYCLES_BE,
583 GRC_CACHE_MISSES,
584 GRC_MAX_NR
585 };
586
587 static const char *get_ratio_color(enum grc_type type, double ratio)
588 {
589 static const double grc_table[GRC_MAX_NR][3] = {
590 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
591 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
592 [GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 },
593 };
594 const char *color = PERF_COLOR_NORMAL;
595
596 if (ratio > grc_table[type][0])
597 color = PERF_COLOR_RED;
598 else if (ratio > grc_table[type][1])
599 color = PERF_COLOR_MAGENTA;
600 else if (ratio > grc_table[type][2])
601 color = PERF_COLOR_YELLOW;
602
603 return color;
604 }
605
606 static void print_stalled_cycles_frontend(int cpu,
607 struct perf_evsel *evsel
608 __maybe_unused, double avg)
609 {
610 double total, ratio = 0.0;
611 const char *color;
612
613 total = avg_stats(&runtime_cycles_stats[cpu]);
614
615 if (total)
616 ratio = avg / total * 100.0;
617
618 color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
619
620 fprintf(output, " # ");
621 color_fprintf(output, color, "%6.2f%%", ratio);
622 fprintf(output, " frontend cycles idle ");
623 }
624
625 static void print_stalled_cycles_backend(int cpu,
626 struct perf_evsel *evsel
627 __maybe_unused, double avg)
628 {
629 double total, ratio = 0.0;
630 const char *color;
631
632 total = avg_stats(&runtime_cycles_stats[cpu]);
633
634 if (total)
635 ratio = avg / total * 100.0;
636
637 color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
638
639 fprintf(output, " # ");
640 color_fprintf(output, color, "%6.2f%%", ratio);
641 fprintf(output, " backend cycles idle ");
642 }
643
644 static void print_branch_misses(int cpu,
645 struct perf_evsel *evsel __maybe_unused,
646 double avg)
647 {
648 double total, ratio = 0.0;
649 const char *color;
650
651 total = avg_stats(&runtime_branches_stats[cpu]);
652
653 if (total)
654 ratio = avg / total * 100.0;
655
656 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
657
658 fprintf(output, " # ");
659 color_fprintf(output, color, "%6.2f%%", ratio);
660 fprintf(output, " of all branches ");
661 }
662
663 static void print_l1_dcache_misses(int cpu,
664 struct perf_evsel *evsel __maybe_unused,
665 double avg)
666 {
667 double total, ratio = 0.0;
668 const char *color;
669
670 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
671
672 if (total)
673 ratio = avg / total * 100.0;
674
675 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
676
677 fprintf(output, " # ");
678 color_fprintf(output, color, "%6.2f%%", ratio);
679 fprintf(output, " of all L1-dcache hits ");
680 }
681
682 static void print_l1_icache_misses(int cpu,
683 struct perf_evsel *evsel __maybe_unused,
684 double avg)
685 {
686 double total, ratio = 0.0;
687 const char *color;
688
689 total = avg_stats(&runtime_l1_icache_stats[cpu]);
690
691 if (total)
692 ratio = avg / total * 100.0;
693
694 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
695
696 fprintf(output, " # ");
697 color_fprintf(output, color, "%6.2f%%", ratio);
698 fprintf(output, " of all L1-icache hits ");
699 }
700
701 static void print_dtlb_cache_misses(int cpu,
702 struct perf_evsel *evsel __maybe_unused,
703 double avg)
704 {
705 double total, ratio = 0.0;
706 const char *color;
707
708 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
709
710 if (total)
711 ratio = avg / total * 100.0;
712
713 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
714
715 fprintf(output, " # ");
716 color_fprintf(output, color, "%6.2f%%", ratio);
717 fprintf(output, " of all dTLB cache hits ");
718 }
719
720 static void print_itlb_cache_misses(int cpu,
721 struct perf_evsel *evsel __maybe_unused,
722 double avg)
723 {
724 double total, ratio = 0.0;
725 const char *color;
726
727 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
728
729 if (total)
730 ratio = avg / total * 100.0;
731
732 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
733
734 fprintf(output, " # ");
735 color_fprintf(output, color, "%6.2f%%", ratio);
736 fprintf(output, " of all iTLB cache hits ");
737 }
738
739 static void print_ll_cache_misses(int cpu,
740 struct perf_evsel *evsel __maybe_unused,
741 double avg)
742 {
743 double total, ratio = 0.0;
744 const char *color;
745
746 total = avg_stats(&runtime_ll_cache_stats[cpu]);
747
748 if (total)
749 ratio = avg / total * 100.0;
750
751 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
752
753 fprintf(output, " # ");
754 color_fprintf(output, color, "%6.2f%%", ratio);
755 fprintf(output, " of all LL-cache hits ");
756 }
757
758 static void abs_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
759 {
760 double total, ratio = 0.0;
761 char cpustr[16] = { '\0', };
762 const char *fmt;
763
764 if (csv_output)
765 fmt = "%s%.0f%s%s";
766 else if (big_num)
767 fmt = "%s%'18.0f%s%-25s";
768 else
769 fmt = "%s%18.0f%s%-25s";
770
771 if (aggr_socket)
772 sprintf(cpustr, "S%*d%s%*d%s",
773 csv_output ? 0 : -5,
774 cpu,
775 csv_sep,
776 csv_output ? 0 : 4,
777 nr,
778 csv_sep);
779 else if (no_aggr)
780 sprintf(cpustr, "CPU%*d%s",
781 csv_output ? 0 : -4,
782 perf_evsel__cpus(evsel)->map[cpu], csv_sep);
783 else
784 cpu = 0;
785
786 fprintf(output, fmt, cpustr, avg, csv_sep, perf_evsel__name(evsel));
787
788 if (evsel->cgrp)
789 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
790
791 if (csv_output || interval)
792 return;
793
794 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
795 total = avg_stats(&runtime_cycles_stats[cpu]);
796 if (total)
797 ratio = avg / total;
798
799 fprintf(output, " # %5.2f insns per cycle ", ratio);
800
801 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
802 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
803
804 if (total && avg) {
805 ratio = total / avg;
806 fprintf(output, "\n # %5.2f stalled cycles per insn", ratio);
807 }
808
809 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
810 runtime_branches_stats[cpu].n != 0) {
811 print_branch_misses(cpu, evsel, avg);
812 } else if (
813 evsel->attr.type == PERF_TYPE_HW_CACHE &&
814 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
815 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
816 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
817 runtime_l1_dcache_stats[cpu].n != 0) {
818 print_l1_dcache_misses(cpu, evsel, avg);
819 } else if (
820 evsel->attr.type == PERF_TYPE_HW_CACHE &&
821 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
822 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
823 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
824 runtime_l1_icache_stats[cpu].n != 0) {
825 print_l1_icache_misses(cpu, evsel, avg);
826 } else if (
827 evsel->attr.type == PERF_TYPE_HW_CACHE &&
828 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
829 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
830 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
831 runtime_dtlb_cache_stats[cpu].n != 0) {
832 print_dtlb_cache_misses(cpu, evsel, avg);
833 } else if (
834 evsel->attr.type == PERF_TYPE_HW_CACHE &&
835 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
836 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
837 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
838 runtime_itlb_cache_stats[cpu].n != 0) {
839 print_itlb_cache_misses(cpu, evsel, avg);
840 } else if (
841 evsel->attr.type == PERF_TYPE_HW_CACHE &&
842 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
843 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
844 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
845 runtime_ll_cache_stats[cpu].n != 0) {
846 print_ll_cache_misses(cpu, evsel, avg);
847 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
848 runtime_cacherefs_stats[cpu].n != 0) {
849 total = avg_stats(&runtime_cacherefs_stats[cpu]);
850
851 if (total)
852 ratio = avg * 100 / total;
853
854 fprintf(output, " # %8.3f %% of all cache refs ", ratio);
855
856 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
857 print_stalled_cycles_frontend(cpu, evsel, avg);
858 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
859 print_stalled_cycles_backend(cpu, evsel, avg);
860 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
861 total = avg_stats(&runtime_nsecs_stats[cpu]);
862
863 if (total)
864 ratio = 1.0 * avg / total;
865
866 fprintf(output, " # %8.3f GHz ", ratio);
867 } else if (runtime_nsecs_stats[cpu].n != 0) {
868 char unit = 'M';
869
870 total = avg_stats(&runtime_nsecs_stats[cpu]);
871
872 if (total)
873 ratio = 1000.0 * avg / total;
874 if (ratio < 0.001) {
875 ratio *= 1000;
876 unit = 'K';
877 }
878
879 fprintf(output, " # %8.3f %c/sec ", ratio, unit);
880 } else {
881 fprintf(output, " ");
882 }
883 }
884
885 static void print_aggr_socket(char *prefix)
886 {
887 struct perf_evsel *counter;
888 u64 ena, run, val;
889 int cpu, s, s2, sock, nr;
890
891 if (!sock_map)
892 return;
893
894 for (s = 0; s < sock_map->nr; s++) {
895 sock = cpu_map__socket(sock_map, s);
896 list_for_each_entry(counter, &evsel_list->entries, node) {
897 val = ena = run = 0;
898 nr = 0;
899 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
900 s2 = cpu_map__get_socket(evsel_list->cpus, cpu);
901 if (s2 != sock)
902 continue;
903 val += counter->counts->cpu[cpu].val;
904 ena += counter->counts->cpu[cpu].ena;
905 run += counter->counts->cpu[cpu].run;
906 nr++;
907 }
908 if (prefix)
909 fprintf(output, "%s", prefix);
910
911 if (run == 0 || ena == 0) {
912 fprintf(output, "S%*d%s%*d%s%*s%s%*s",
913 csv_output ? 0 : -5,
914 s,
915 csv_sep,
916 csv_output ? 0 : 4,
917 nr,
918 csv_sep,
919 csv_output ? 0 : 18,
920 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
921 csv_sep,
922 csv_output ? 0 : -24,
923 perf_evsel__name(counter));
924 if (counter->cgrp)
925 fprintf(output, "%s%s",
926 csv_sep, counter->cgrp->name);
927
928 fputc('\n', output);
929 continue;
930 }
931
932 if (nsec_counter(counter))
933 nsec_printout(sock, nr, counter, val);
934 else
935 abs_printout(sock, nr, counter, val);
936
937 if (!csv_output) {
938 print_noise(counter, 1.0);
939
940 if (run != ena)
941 fprintf(output, " (%.2f%%)",
942 100.0 * run / ena);
943 }
944 fputc('\n', output);
945 }
946 }
947 }
948
949 /*
950 * Print out the results of a single counter:
951 * aggregated counts in system-wide mode
952 */
953 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
954 {
955 struct perf_stat *ps = counter->priv;
956 double avg = avg_stats(&ps->res_stats[0]);
957 int scaled = counter->counts->scaled;
958
959 if (prefix)
960 fprintf(output, "%s", prefix);
961
962 if (scaled == -1) {
963 fprintf(output, "%*s%s%*s",
964 csv_output ? 0 : 18,
965 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
966 csv_sep,
967 csv_output ? 0 : -24,
968 perf_evsel__name(counter));
969
970 if (counter->cgrp)
971 fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
972
973 fputc('\n', output);
974 return;
975 }
976
977 if (nsec_counter(counter))
978 nsec_printout(-1, 0, counter, avg);
979 else
980 abs_printout(-1, 0, counter, avg);
981
982 print_noise(counter, avg);
983
984 if (csv_output) {
985 fputc('\n', output);
986 return;
987 }
988
989 if (scaled) {
990 double avg_enabled, avg_running;
991
992 avg_enabled = avg_stats(&ps->res_stats[1]);
993 avg_running = avg_stats(&ps->res_stats[2]);
994
995 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
996 }
997 fprintf(output, "\n");
998 }
999
1000 /*
1001 * Print out the results of a single counter:
1002 * does not use aggregated count in system-wide
1003 */
1004 static void print_counter(struct perf_evsel *counter, char *prefix)
1005 {
1006 u64 ena, run, val;
1007 int cpu;
1008
1009 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1010 val = counter->counts->cpu[cpu].val;
1011 ena = counter->counts->cpu[cpu].ena;
1012 run = counter->counts->cpu[cpu].run;
1013
1014 if (prefix)
1015 fprintf(output, "%s", prefix);
1016
1017 if (run == 0 || ena == 0) {
1018 fprintf(output, "CPU%*d%s%*s%s%*s",
1019 csv_output ? 0 : -4,
1020 perf_evsel__cpus(counter)->map[cpu], csv_sep,
1021 csv_output ? 0 : 18,
1022 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1023 csv_sep,
1024 csv_output ? 0 : -24,
1025 perf_evsel__name(counter));
1026
1027 if (counter->cgrp)
1028 fprintf(output, "%s%s",
1029 csv_sep, counter->cgrp->name);
1030
1031 fputc('\n', output);
1032 continue;
1033 }
1034
1035 if (nsec_counter(counter))
1036 nsec_printout(cpu, 0, counter, val);
1037 else
1038 abs_printout(cpu, 0, counter, val);
1039
1040 if (!csv_output) {
1041 print_noise(counter, 1.0);
1042
1043 if (run != ena)
1044 fprintf(output, " (%.2f%%)",
1045 100.0 * run / ena);
1046 }
1047 fputc('\n', output);
1048 }
1049 }
1050
1051 static void print_stat(int argc, const char **argv)
1052 {
1053 struct perf_evsel *counter;
1054 int i;
1055
1056 fflush(stdout);
1057
1058 if (!csv_output) {
1059 fprintf(output, "\n");
1060 fprintf(output, " Performance counter stats for ");
1061 if (!perf_target__has_task(&target)) {
1062 fprintf(output, "\'%s", argv[0]);
1063 for (i = 1; i < argc; i++)
1064 fprintf(output, " %s", argv[i]);
1065 } else if (target.pid)
1066 fprintf(output, "process id \'%s", target.pid);
1067 else
1068 fprintf(output, "thread id \'%s", target.tid);
1069
1070 fprintf(output, "\'");
1071 if (run_count > 1)
1072 fprintf(output, " (%d runs)", run_count);
1073 fprintf(output, ":\n\n");
1074 }
1075
1076 if (aggr_socket)
1077 print_aggr_socket(NULL);
1078 else if (no_aggr) {
1079 list_for_each_entry(counter, &evsel_list->entries, node)
1080 print_counter(counter, NULL);
1081 } else {
1082 list_for_each_entry(counter, &evsel_list->entries, node)
1083 print_counter_aggr(counter, NULL);
1084 }
1085
1086 if (!csv_output) {
1087 if (!null_run)
1088 fprintf(output, "\n");
1089 fprintf(output, " %17.9f seconds time elapsed",
1090 avg_stats(&walltime_nsecs_stats)/1e9);
1091 if (run_count > 1) {
1092 fprintf(output, " ");
1093 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1094 avg_stats(&walltime_nsecs_stats));
1095 }
1096 fprintf(output, "\n\n");
1097 }
1098 }
1099
1100 static volatile int signr = -1;
1101
1102 static void skip_signal(int signo)
1103 {
1104 if ((child_pid == -1) || interval)
1105 done = 1;
1106
1107 signr = signo;
1108 }
1109
1110 static void sig_atexit(void)
1111 {
1112 if (child_pid != -1)
1113 kill(child_pid, SIGTERM);
1114
1115 if (signr == -1)
1116 return;
1117
1118 signal(signr, SIG_DFL);
1119 kill(getpid(), signr);
1120 }
1121
1122 static int stat__set_big_num(const struct option *opt __maybe_unused,
1123 const char *s __maybe_unused, int unset)
1124 {
1125 big_num_opt = unset ? 0 : 1;
1126 return 0;
1127 }
1128
1129 /*
1130 * Add default attributes, if there were no attributes specified or
1131 * if -d/--detailed, -d -d or -d -d -d is used:
1132 */
1133 static int add_default_attributes(void)
1134 {
1135 struct perf_event_attr default_attrs[] = {
1136
1137 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1138 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1139 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1140 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1141
1142 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1143 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1144 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1145 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1146 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1147 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1148
1149 };
1150
1151 /*
1152 * Detailed stats (-d), covering the L1 and last level data caches:
1153 */
1154 struct perf_event_attr detailed_attrs[] = {
1155
1156 { .type = PERF_TYPE_HW_CACHE,
1157 .config =
1158 PERF_COUNT_HW_CACHE_L1D << 0 |
1159 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1160 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1161
1162 { .type = PERF_TYPE_HW_CACHE,
1163 .config =
1164 PERF_COUNT_HW_CACHE_L1D << 0 |
1165 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1166 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1167
1168 { .type = PERF_TYPE_HW_CACHE,
1169 .config =
1170 PERF_COUNT_HW_CACHE_LL << 0 |
1171 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1172 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1173
1174 { .type = PERF_TYPE_HW_CACHE,
1175 .config =
1176 PERF_COUNT_HW_CACHE_LL << 0 |
1177 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1178 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1179 };
1180
1181 /*
1182 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1183 */
1184 struct perf_event_attr very_detailed_attrs[] = {
1185
1186 { .type = PERF_TYPE_HW_CACHE,
1187 .config =
1188 PERF_COUNT_HW_CACHE_L1I << 0 |
1189 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1190 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1191
1192 { .type = PERF_TYPE_HW_CACHE,
1193 .config =
1194 PERF_COUNT_HW_CACHE_L1I << 0 |
1195 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1196 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1197
1198 { .type = PERF_TYPE_HW_CACHE,
1199 .config =
1200 PERF_COUNT_HW_CACHE_DTLB << 0 |
1201 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1202 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1203
1204 { .type = PERF_TYPE_HW_CACHE,
1205 .config =
1206 PERF_COUNT_HW_CACHE_DTLB << 0 |
1207 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1208 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1209
1210 { .type = PERF_TYPE_HW_CACHE,
1211 .config =
1212 PERF_COUNT_HW_CACHE_ITLB << 0 |
1213 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1214 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1215
1216 { .type = PERF_TYPE_HW_CACHE,
1217 .config =
1218 PERF_COUNT_HW_CACHE_ITLB << 0 |
1219 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1220 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1221
1222 };
1223
1224 /*
1225 * Very, very detailed stats (-d -d -d), adding prefetch events:
1226 */
1227 struct perf_event_attr very_very_detailed_attrs[] = {
1228
1229 { .type = PERF_TYPE_HW_CACHE,
1230 .config =
1231 PERF_COUNT_HW_CACHE_L1D << 0 |
1232 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1233 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1234
1235 { .type = PERF_TYPE_HW_CACHE,
1236 .config =
1237 PERF_COUNT_HW_CACHE_L1D << 0 |
1238 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1239 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1240 };
1241
1242 /* Set attrs if no event is selected and !null_run: */
1243 if (null_run)
1244 return 0;
1245
1246 if (!evsel_list->nr_entries) {
1247 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1248 return -1;
1249 }
1250
1251 /* Detailed events get appended to the event list: */
1252
1253 if (detailed_run < 1)
1254 return 0;
1255
1256 /* Append detailed run extra attributes: */
1257 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1258 return -1;
1259
1260 if (detailed_run < 2)
1261 return 0;
1262
1263 /* Append very detailed run extra attributes: */
1264 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1265 return -1;
1266
1267 if (detailed_run < 3)
1268 return 0;
1269
1270 /* Append very, very detailed run extra attributes: */
1271 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1272 }
1273
1274 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1275 {
1276 bool append_file = false;
1277 int output_fd = 0;
1278 const char *output_name = NULL;
1279 const struct option options[] = {
1280 OPT_CALLBACK('e', "event", &evsel_list, "event",
1281 "event selector. use 'perf list' to list available events",
1282 parse_events_option),
1283 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1284 "event filter", parse_filter),
1285 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1286 "child tasks do not inherit counters"),
1287 OPT_STRING('p', "pid", &target.pid, "pid",
1288 "stat events on existing process id"),
1289 OPT_STRING('t', "tid", &target.tid, "tid",
1290 "stat events on existing thread id"),
1291 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1292 "system-wide collection from all CPUs"),
1293 OPT_BOOLEAN('g', "group", &group,
1294 "put the counters into a counter group"),
1295 OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1296 OPT_INCR('v', "verbose", &verbose,
1297 "be more verbose (show counter open errors, etc)"),
1298 OPT_INTEGER('r', "repeat", &run_count,
1299 "repeat command and print average + stddev (max: 100)"),
1300 OPT_BOOLEAN('n', "null", &null_run,
1301 "null run - dont start any counters"),
1302 OPT_INCR('d', "detailed", &detailed_run,
1303 "detailed run - start a lot of events"),
1304 OPT_BOOLEAN('S', "sync", &sync_run,
1305 "call sync() before starting a run"),
1306 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1307 "print large numbers with thousands\' separators",
1308 stat__set_big_num),
1309 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1310 "list of cpus to monitor in system-wide"),
1311 OPT_BOOLEAN('A', "no-aggr", &no_aggr, "disable CPU count aggregation"),
1312 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1313 "print counts with custom separator"),
1314 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1315 "monitor event in cgroup name only", parse_cgroups),
1316 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1317 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1318 OPT_INTEGER(0, "log-fd", &output_fd,
1319 "log output to fd, instead of stderr"),
1320 OPT_STRING(0, "pre", &pre_cmd, "command",
1321 "command to run prior to the measured command"),
1322 OPT_STRING(0, "post", &post_cmd, "command",
1323 "command to run after to the measured command"),
1324 OPT_UINTEGER('I', "interval-print", &interval,
1325 "print counts at regular interval in ms (>= 100)"),
1326 OPT_BOOLEAN(0, "aggr-socket", &aggr_socket, "aggregate counts per processor socket"),
1327 OPT_END()
1328 };
1329 const char * const stat_usage[] = {
1330 "perf stat [<options>] [<command>]",
1331 NULL
1332 };
1333 struct perf_evsel *pos;
1334 int status = -ENOMEM, run_idx;
1335 const char *mode;
1336
1337 setlocale(LC_ALL, "");
1338
1339 evsel_list = perf_evlist__new(NULL, NULL);
1340 if (evsel_list == NULL)
1341 return -ENOMEM;
1342
1343 argc = parse_options(argc, argv, options, stat_usage,
1344 PARSE_OPT_STOP_AT_NON_OPTION);
1345
1346 output = stderr;
1347 if (output_name && strcmp(output_name, "-"))
1348 output = NULL;
1349
1350 if (output_name && output_fd) {
1351 fprintf(stderr, "cannot use both --output and --log-fd\n");
1352 usage_with_options(stat_usage, options);
1353 }
1354
1355 if (output_fd < 0) {
1356 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1357 usage_with_options(stat_usage, options);
1358 }
1359
1360 if (!output) {
1361 struct timespec tm;
1362 mode = append_file ? "a" : "w";
1363
1364 output = fopen(output_name, mode);
1365 if (!output) {
1366 perror("failed to create output file");
1367 return -1;
1368 }
1369 clock_gettime(CLOCK_REALTIME, &tm);
1370 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1371 } else if (output_fd > 0) {
1372 mode = append_file ? "a" : "w";
1373 output = fdopen(output_fd, mode);
1374 if (!output) {
1375 perror("Failed opening logfd");
1376 return -errno;
1377 }
1378 }
1379
1380 if (csv_sep) {
1381 csv_output = true;
1382 if (!strcmp(csv_sep, "\\t"))
1383 csv_sep = "\t";
1384 } else
1385 csv_sep = DEFAULT_SEPARATOR;
1386
1387 /*
1388 * let the spreadsheet do the pretty-printing
1389 */
1390 if (csv_output) {
1391 /* User explicitly passed -B? */
1392 if (big_num_opt == 1) {
1393 fprintf(stderr, "-B option not supported with -x\n");
1394 usage_with_options(stat_usage, options);
1395 } else /* Nope, so disable big number formatting */
1396 big_num = false;
1397 } else if (big_num_opt == 0) /* User passed --no-big-num */
1398 big_num = false;
1399
1400 if (!argc && !perf_target__has_task(&target))
1401 usage_with_options(stat_usage, options);
1402 if (run_count <= 0)
1403 usage_with_options(stat_usage, options);
1404
1405 /* no_aggr, cgroup are for system-wide only */
1406 if ((no_aggr || nr_cgroups) && !perf_target__has_cpu(&target)) {
1407 fprintf(stderr, "both cgroup and no-aggregation "
1408 "modes only available in system-wide mode\n");
1409
1410 usage_with_options(stat_usage, options);
1411 }
1412
1413 if (aggr_socket) {
1414 if (!perf_target__has_cpu(&target)) {
1415 fprintf(stderr, "--aggr-socket only available in system-wide mode (-a)\n");
1416 usage_with_options(stat_usage, options);
1417 }
1418 no_aggr = true;
1419 }
1420
1421 if (add_default_attributes())
1422 goto out;
1423
1424 perf_target__validate(&target);
1425
1426 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1427 if (perf_target__has_task(&target))
1428 pr_err("Problems finding threads of monitor\n");
1429 if (perf_target__has_cpu(&target))
1430 perror("failed to parse CPUs map");
1431
1432 usage_with_options(stat_usage, options);
1433 return -1;
1434 }
1435 if (interval && interval < 100) {
1436 pr_err("print interval must be >= 100ms\n");
1437 usage_with_options(stat_usage, options);
1438 return -1;
1439 }
1440
1441 list_for_each_entry(pos, &evsel_list->entries, node) {
1442 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1443 perf_evsel__alloc_counts(pos, perf_evsel__nr_cpus(pos)) < 0)
1444 goto out_free_fd;
1445 }
1446 if (interval) {
1447 list_for_each_entry(pos, &evsel_list->entries, node) {
1448 if (perf_evsel__alloc_prev_raw_counts(pos) < 0)
1449 goto out_free_fd;
1450 }
1451 }
1452
1453 /*
1454 * We dont want to block the signals - that would cause
1455 * child tasks to inherit that and Ctrl-C would not work.
1456 * What we want is for Ctrl-C to work in the exec()-ed
1457 * task, but being ignored by perf stat itself:
1458 */
1459 atexit(sig_atexit);
1460 signal(SIGINT, skip_signal);
1461 signal(SIGCHLD, skip_signal);
1462 signal(SIGALRM, skip_signal);
1463 signal(SIGABRT, skip_signal);
1464
1465 status = 0;
1466 for (run_idx = 0; run_idx < run_count; run_idx++) {
1467 if (run_count != 1 && verbose)
1468 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1469 run_idx + 1);
1470
1471 status = run_perf_stat(argc, argv);
1472 }
1473
1474 if (status != -1 && !interval)
1475 print_stat(argc, argv);
1476 out_free_fd:
1477 list_for_each_entry(pos, &evsel_list->entries, node) {
1478 perf_evsel__free_stat_priv(pos);
1479 perf_evsel__free_counts(pos);
1480 perf_evsel__free_prev_raw_counts(pos);
1481 }
1482 perf_evlist__delete_maps(evsel_list);
1483 out:
1484 perf_evlist__delete(evsel_list);
1485 return status;
1486 }
Linux kernel - Deliverables
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