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mm, highmem: get virtual address of the page using PKMAP_ADDR()
[linux-2.6/btrfs-unstable.git] / tools / perf / builtin-stat.c
blob93b9011fa3e27a5cc61dc6e96a962cf63cd2b5f2
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 <sys/prctl.h>
61 #include <locale.h>
62
63 #define DEFAULT_SEPARATOR " "
64 #define CNTR_NOT_SUPPORTED "<not supported>"
65 #define CNTR_NOT_COUNTED "<not counted>"
66
67 static struct perf_evlist *evsel_list;
68
69 static struct perf_target target = {
70 .uid = UINT_MAX,
71 };
72
73 static int run_count = 1;
74 static bool no_inherit = false;
75 static bool scale = true;
76 static bool no_aggr = false;
77 static pid_t child_pid = -1;
78 static bool null_run = false;
79 static int detailed_run = 0;
80 static bool big_num = true;
81 static int big_num_opt = -1;
82 static const char *csv_sep = NULL;
83 static bool csv_output = false;
84 static bool group = false;
85 static FILE *output = NULL;
86
87 static volatile int done = 0;
88
89 struct perf_stat {
90 struct stats res_stats[3];
91 };
92
93 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
94 {
95 evsel->priv = zalloc(sizeof(struct perf_stat));
96 return evsel->priv == NULL ? -ENOMEM : 0;
97 }
98
99 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
100 {
101 free(evsel->priv);
102 evsel->priv = NULL;
103 }
104
105 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
106 {
107 return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
108 }
109
110 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
111 {
112 return perf_evsel__cpus(evsel)->nr;
113 }
114
115 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
116 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
117 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
118 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
119 static struct stats runtime_branches_stats[MAX_NR_CPUS];
120 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
121 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
122 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
123 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
124 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
125 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
126 static struct stats walltime_nsecs_stats;
127
128 static int create_perf_stat_counter(struct perf_evsel *evsel,
129 struct perf_evsel *first)
130 {
131 struct perf_event_attr *attr = &evsel->attr;
132 bool exclude_guest_missing = false;
133 int ret;
134
135 if (scale)
136 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
137 PERF_FORMAT_TOTAL_TIME_RUNNING;
138
139 attr->inherit = !no_inherit;
140
141 retry:
142 if (exclude_guest_missing)
143 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
144
145 if (perf_target__has_cpu(&target)) {
146 ret = perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
147 if (ret)
148 goto check_ret;
149 return 0;
150 }
151
152 if (!perf_target__has_task(&target) && (!group || evsel == first)) {
153 attr->disabled = 1;
154 attr->enable_on_exec = 1;
155 }
156
157 ret = perf_evsel__open_per_thread(evsel, evsel_list->threads);
158 if (!ret)
159 return 0;
160 /* fall through */
161 check_ret:
162 if (ret && errno == EINVAL) {
163 if (!exclude_guest_missing &&
164 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
165 pr_debug("Old kernel, cannot exclude "
166 "guest or host samples.\n");
167 exclude_guest_missing = true;
168 goto retry;
169 }
170 }
171 return ret;
172 }
173
174 /*
175 * Does the counter have nsecs as a unit?
176 */
177 static inline int nsec_counter(struct perf_evsel *evsel)
178 {
179 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
180 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
181 return 1;
182
183 return 0;
184 }
185
186 /*
187 * Update various tracking values we maintain to print
188 * more semantic information such as miss/hit ratios,
189 * instruction rates, etc:
190 */
191 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
192 {
193 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
194 update_stats(&runtime_nsecs_stats[0], count[0]);
195 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
196 update_stats(&runtime_cycles_stats[0], count[0]);
197 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
198 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
199 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
200 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
201 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
202 update_stats(&runtime_branches_stats[0], count[0]);
203 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
204 update_stats(&runtime_cacherefs_stats[0], count[0]);
205 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
206 update_stats(&runtime_l1_dcache_stats[0], count[0]);
207 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
208 update_stats(&runtime_l1_icache_stats[0], count[0]);
209 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
210 update_stats(&runtime_ll_cache_stats[0], count[0]);
211 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
212 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
213 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
214 update_stats(&runtime_itlb_cache_stats[0], count[0]);
215 }
216
217 /*
218 * Read out the results of a single counter:
219 * aggregate counts across CPUs in system-wide mode
220 */
221 static int read_counter_aggr(struct perf_evsel *counter)
222 {
223 struct perf_stat *ps = counter->priv;
224 u64 *count = counter->counts->aggr.values;
225 int i;
226
227 if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
228 evsel_list->threads->nr, scale) < 0)
229 return -1;
230
231 for (i = 0; i < 3; i++)
232 update_stats(&ps->res_stats[i], count[i]);
233
234 if (verbose) {
235 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
236 perf_evsel__name(counter), count[0], count[1], count[2]);
237 }
238
239 /*
240 * Save the full runtime - to allow normalization during printout:
241 */
242 update_shadow_stats(counter, count);
243
244 return 0;
245 }
246
247 /*
248 * Read out the results of a single counter:
249 * do not aggregate counts across CPUs in system-wide mode
250 */
251 static int read_counter(struct perf_evsel *counter)
252 {
253 u64 *count;
254 int cpu;
255
256 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
257 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
258 return -1;
259
260 count = counter->counts->cpu[cpu].values;
261
262 update_shadow_stats(counter, count);
263 }
264
265 return 0;
266 }
267
268 static int run_perf_stat(int argc __maybe_unused, const char **argv)
269 {
270 unsigned long long t0, t1;
271 struct perf_evsel *counter, *first;
272 int status = 0;
273 int child_ready_pipe[2], go_pipe[2];
274 const bool forks = (argc > 0);
275 char buf;
276
277 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
278 perror("failed to create pipes");
279 return -1;
280 }
281
282 if (forks) {
283 if ((child_pid = fork()) < 0)
284 perror("failed to fork");
285
286 if (!child_pid) {
287 close(child_ready_pipe[0]);
288 close(go_pipe[1]);
289 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
290
291 /*
292 * Do a dummy execvp to get the PLT entry resolved,
293 * so we avoid the resolver overhead on the real
294 * execvp call.
295 */
296 execvp("", (char **)argv);
297
298 /*
299 * Tell the parent we're ready to go
300 */
301 close(child_ready_pipe[1]);
302
303 /*
304 * Wait until the parent tells us to go.
305 */
306 if (read(go_pipe[0], &buf, 1) == -1)
307 perror("unable to read pipe");
308
309 execvp(argv[0], (char **)argv);
310
311 perror(argv[0]);
312 exit(-1);
313 }
314
315 if (perf_target__none(&target))
316 evsel_list->threads->map[0] = child_pid;
317
318 /*
319 * Wait for the child to be ready to exec.
320 */
321 close(child_ready_pipe[1]);
322 close(go_pipe[0]);
323 if (read(child_ready_pipe[0], &buf, 1) == -1)
324 perror("unable to read pipe");
325 close(child_ready_pipe[0]);
326 }
327
328 if (group)
329 perf_evlist__set_leader(evsel_list);
330
331 first = perf_evlist__first(evsel_list);
332
333 list_for_each_entry(counter, &evsel_list->entries, node) {
334 if (create_perf_stat_counter(counter, first) < 0) {
335 /*
336 * PPC returns ENXIO for HW counters until 2.6.37
337 * (behavior changed with commit b0a873e).
338 */
339 if (errno == EINVAL || errno == ENOSYS ||
340 errno == ENOENT || errno == EOPNOTSUPP ||
341 errno == ENXIO) {
342 if (verbose)
343 ui__warning("%s event is not supported by the kernel.\n",
344 perf_evsel__name(counter));
345 counter->supported = false;
346 continue;
347 }
348
349 if (errno == EPERM || errno == EACCES) {
350 error("You may not have permission to collect %sstats.\n"
351 "\t Consider tweaking"
352 " /proc/sys/kernel/perf_event_paranoid or running as root.",
353 target.system_wide ? "system-wide " : "");
354 } else {
355 error("open_counter returned with %d (%s). "
356 "/bin/dmesg may provide additional information.\n",
357 errno, strerror(errno));
358 }
359 if (child_pid != -1)
360 kill(child_pid, SIGTERM);
361
362 pr_err("Not all events could be opened.\n");
363 return -1;
364 }
365 counter->supported = true;
366 }
367
368 if (perf_evlist__apply_filters(evsel_list)) {
369 error("failed to set filter with %d (%s)\n", errno,
370 strerror(errno));
371 return -1;
372 }
373
374 /*
375 * Enable counters and exec the command:
376 */
377 t0 = rdclock();
378
379 if (forks) {
380 close(go_pipe[1]);
381 wait(&status);
382 if (WIFSIGNALED(status))
383 psignal(WTERMSIG(status), argv[0]);
384 } else {
385 while(!done) sleep(1);
386 }
387
388 t1 = rdclock();
389
390 update_stats(&walltime_nsecs_stats, t1 - t0);
391
392 if (no_aggr) {
393 list_for_each_entry(counter, &evsel_list->entries, node) {
394 read_counter(counter);
395 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
396 }
397 } else {
398 list_for_each_entry(counter, &evsel_list->entries, node) {
399 read_counter_aggr(counter);
400 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
401 evsel_list->threads->nr);
402 }
403 }
404
405 return WEXITSTATUS(status);
406 }
407
408 static void print_noise_pct(double total, double avg)
409 {
410 double pct = rel_stddev_stats(total, avg);
411
412 if (csv_output)
413 fprintf(output, "%s%.2f%%", csv_sep, pct);
414 else if (pct)
415 fprintf(output, " ( +-%6.2f%% )", pct);
416 }
417
418 static void print_noise(struct perf_evsel *evsel, double avg)
419 {
420 struct perf_stat *ps;
421
422 if (run_count == 1)
423 return;
424
425 ps = evsel->priv;
426 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
427 }
428
429 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
430 {
431 double msecs = avg / 1e6;
432 char cpustr[16] = { '\0', };
433 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
434
435 if (no_aggr)
436 sprintf(cpustr, "CPU%*d%s",
437 csv_output ? 0 : -4,
438 perf_evsel__cpus(evsel)->map[cpu], csv_sep);
439
440 fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
441
442 if (evsel->cgrp)
443 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
444
445 if (csv_output)
446 return;
447
448 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
449 fprintf(output, " # %8.3f CPUs utilized ",
450 avg / avg_stats(&walltime_nsecs_stats));
451 else
452 fprintf(output, " ");
453 }
454
455 /* used for get_ratio_color() */
456 enum grc_type {
457 GRC_STALLED_CYCLES_FE,
458 GRC_STALLED_CYCLES_BE,
459 GRC_CACHE_MISSES,
460 GRC_MAX_NR
461 };
462
463 static const char *get_ratio_color(enum grc_type type, double ratio)
464 {
465 static const double grc_table[GRC_MAX_NR][3] = {
466 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
467 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
468 [GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 },
469 };
470 const char *color = PERF_COLOR_NORMAL;
471
472 if (ratio > grc_table[type][0])
473 color = PERF_COLOR_RED;
474 else if (ratio > grc_table[type][1])
475 color = PERF_COLOR_MAGENTA;
476 else if (ratio > grc_table[type][2])
477 color = PERF_COLOR_YELLOW;
478
479 return color;
480 }
481
482 static void print_stalled_cycles_frontend(int cpu,
483 struct perf_evsel *evsel
484 __maybe_unused, double avg)
485 {
486 double total, ratio = 0.0;
487 const char *color;
488
489 total = avg_stats(&runtime_cycles_stats[cpu]);
490
491 if (total)
492 ratio = avg / total * 100.0;
493
494 color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
495
496 fprintf(output, " # ");
497 color_fprintf(output, color, "%6.2f%%", ratio);
498 fprintf(output, " frontend cycles idle ");
499 }
500
501 static void print_stalled_cycles_backend(int cpu,
502 struct perf_evsel *evsel
503 __maybe_unused, double avg)
504 {
505 double total, ratio = 0.0;
506 const char *color;
507
508 total = avg_stats(&runtime_cycles_stats[cpu]);
509
510 if (total)
511 ratio = avg / total * 100.0;
512
513 color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
514
515 fprintf(output, " # ");
516 color_fprintf(output, color, "%6.2f%%", ratio);
517 fprintf(output, " backend cycles idle ");
518 }
519
520 static void print_branch_misses(int cpu,
521 struct perf_evsel *evsel __maybe_unused,
522 double avg)
523 {
524 double total, ratio = 0.0;
525 const char *color;
526
527 total = avg_stats(&runtime_branches_stats[cpu]);
528
529 if (total)
530 ratio = avg / total * 100.0;
531
532 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
533
534 fprintf(output, " # ");
535 color_fprintf(output, color, "%6.2f%%", ratio);
536 fprintf(output, " of all branches ");
537 }
538
539 static void print_l1_dcache_misses(int cpu,
540 struct perf_evsel *evsel __maybe_unused,
541 double avg)
542 {
543 double total, ratio = 0.0;
544 const char *color;
545
546 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
547
548 if (total)
549 ratio = avg / total * 100.0;
550
551 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
552
553 fprintf(output, " # ");
554 color_fprintf(output, color, "%6.2f%%", ratio);
555 fprintf(output, " of all L1-dcache hits ");
556 }
557
558 static void print_l1_icache_misses(int cpu,
559 struct perf_evsel *evsel __maybe_unused,
560 double avg)
561 {
562 double total, ratio = 0.0;
563 const char *color;
564
565 total = avg_stats(&runtime_l1_icache_stats[cpu]);
566
567 if (total)
568 ratio = avg / total * 100.0;
569
570 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
571
572 fprintf(output, " # ");
573 color_fprintf(output, color, "%6.2f%%", ratio);
574 fprintf(output, " of all L1-icache hits ");
575 }
576
577 static void print_dtlb_cache_misses(int cpu,
578 struct perf_evsel *evsel __maybe_unused,
579 double avg)
580 {
581 double total, ratio = 0.0;
582 const char *color;
583
584 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
585
586 if (total)
587 ratio = avg / total * 100.0;
588
589 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
590
591 fprintf(output, " # ");
592 color_fprintf(output, color, "%6.2f%%", ratio);
593 fprintf(output, " of all dTLB cache hits ");
594 }
595
596 static void print_itlb_cache_misses(int cpu,
597 struct perf_evsel *evsel __maybe_unused,
598 double avg)
599 {
600 double total, ratio = 0.0;
601 const char *color;
602
603 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
604
605 if (total)
606 ratio = avg / total * 100.0;
607
608 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
609
610 fprintf(output, " # ");
611 color_fprintf(output, color, "%6.2f%%", ratio);
612 fprintf(output, " of all iTLB cache hits ");
613 }
614
615 static void print_ll_cache_misses(int cpu,
616 struct perf_evsel *evsel __maybe_unused,
617 double avg)
618 {
619 double total, ratio = 0.0;
620 const char *color;
621
622 total = avg_stats(&runtime_ll_cache_stats[cpu]);
623
624 if (total)
625 ratio = avg / total * 100.0;
626
627 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
628
629 fprintf(output, " # ");
630 color_fprintf(output, color, "%6.2f%%", ratio);
631 fprintf(output, " of all LL-cache hits ");
632 }
633
634 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
635 {
636 double total, ratio = 0.0;
637 char cpustr[16] = { '\0', };
638 const char *fmt;
639
640 if (csv_output)
641 fmt = "%s%.0f%s%s";
642 else if (big_num)
643 fmt = "%s%'18.0f%s%-25s";
644 else
645 fmt = "%s%18.0f%s%-25s";
646
647 if (no_aggr)
648 sprintf(cpustr, "CPU%*d%s",
649 csv_output ? 0 : -4,
650 perf_evsel__cpus(evsel)->map[cpu], csv_sep);
651 else
652 cpu = 0;
653
654 fprintf(output, fmt, cpustr, avg, csv_sep, perf_evsel__name(evsel));
655
656 if (evsel->cgrp)
657 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
658
659 if (csv_output)
660 return;
661
662 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
663 total = avg_stats(&runtime_cycles_stats[cpu]);
664
665 if (total)
666 ratio = avg / total;
667
668 fprintf(output, " # %5.2f insns per cycle ", ratio);
669
670 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
671 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
672
673 if (total && avg) {
674 ratio = total / avg;
675 fprintf(output, "\n # %5.2f stalled cycles per insn", ratio);
676 }
677
678 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
679 runtime_branches_stats[cpu].n != 0) {
680 print_branch_misses(cpu, evsel, avg);
681 } else if (
682 evsel->attr.type == PERF_TYPE_HW_CACHE &&
683 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
684 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
685 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
686 runtime_l1_dcache_stats[cpu].n != 0) {
687 print_l1_dcache_misses(cpu, evsel, avg);
688 } else if (
689 evsel->attr.type == PERF_TYPE_HW_CACHE &&
690 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
691 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
692 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
693 runtime_l1_icache_stats[cpu].n != 0) {
694 print_l1_icache_misses(cpu, evsel, avg);
695 } else if (
696 evsel->attr.type == PERF_TYPE_HW_CACHE &&
697 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
698 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
699 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
700 runtime_dtlb_cache_stats[cpu].n != 0) {
701 print_dtlb_cache_misses(cpu, evsel, avg);
702 } else if (
703 evsel->attr.type == PERF_TYPE_HW_CACHE &&
704 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
705 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
706 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
707 runtime_itlb_cache_stats[cpu].n != 0) {
708 print_itlb_cache_misses(cpu, evsel, avg);
709 } else if (
710 evsel->attr.type == PERF_TYPE_HW_CACHE &&
711 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
712 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
713 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
714 runtime_ll_cache_stats[cpu].n != 0) {
715 print_ll_cache_misses(cpu, evsel, avg);
716 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
717 runtime_cacherefs_stats[cpu].n != 0) {
718 total = avg_stats(&runtime_cacherefs_stats[cpu]);
719
720 if (total)
721 ratio = avg * 100 / total;
722
723 fprintf(output, " # %8.3f %% of all cache refs ", ratio);
724
725 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
726 print_stalled_cycles_frontend(cpu, evsel, avg);
727 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
728 print_stalled_cycles_backend(cpu, evsel, avg);
729 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
730 total = avg_stats(&runtime_nsecs_stats[cpu]);
731
732 if (total)
733 ratio = 1.0 * avg / total;
734
735 fprintf(output, " # %8.3f GHz ", ratio);
736 } else if (runtime_nsecs_stats[cpu].n != 0) {
737 char unit = 'M';
738
739 total = avg_stats(&runtime_nsecs_stats[cpu]);
740
741 if (total)
742 ratio = 1000.0 * avg / total;
743 if (ratio < 0.001) {
744 ratio *= 1000;
745 unit = 'K';
746 }
747
748 fprintf(output, " # %8.3f %c/sec ", ratio, unit);
749 } else {
750 fprintf(output, " ");
751 }
752 }
753
754 /*
755 * Print out the results of a single counter:
756 * aggregated counts in system-wide mode
757 */
758 static void print_counter_aggr(struct perf_evsel *counter)
759 {
760 struct perf_stat *ps = counter->priv;
761 double avg = avg_stats(&ps->res_stats[0]);
762 int scaled = counter->counts->scaled;
763
764 if (scaled == -1) {
765 fprintf(output, "%*s%s%*s",
766 csv_output ? 0 : 18,
767 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
768 csv_sep,
769 csv_output ? 0 : -24,
770 perf_evsel__name(counter));
771
772 if (counter->cgrp)
773 fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
774
775 fputc('\n', output);
776 return;
777 }
778
779 if (nsec_counter(counter))
780 nsec_printout(-1, counter, avg);
781 else
782 abs_printout(-1, counter, avg);
783
784 print_noise(counter, avg);
785
786 if (csv_output) {
787 fputc('\n', output);
788 return;
789 }
790
791 if (scaled) {
792 double avg_enabled, avg_running;
793
794 avg_enabled = avg_stats(&ps->res_stats[1]);
795 avg_running = avg_stats(&ps->res_stats[2]);
796
797 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
798 }
799 fprintf(output, "\n");
800 }
801
802 /*
803 * Print out the results of a single counter:
804 * does not use aggregated count in system-wide
805 */
806 static void print_counter(struct perf_evsel *counter)
807 {
808 u64 ena, run, val;
809 int cpu;
810
811 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
812 val = counter->counts->cpu[cpu].val;
813 ena = counter->counts->cpu[cpu].ena;
814 run = counter->counts->cpu[cpu].run;
815 if (run == 0 || ena == 0) {
816 fprintf(output, "CPU%*d%s%*s%s%*s",
817 csv_output ? 0 : -4,
818 perf_evsel__cpus(counter)->map[cpu], csv_sep,
819 csv_output ? 0 : 18,
820 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
821 csv_sep,
822 csv_output ? 0 : -24,
823 perf_evsel__name(counter));
824
825 if (counter->cgrp)
826 fprintf(output, "%s%s",
827 csv_sep, counter->cgrp->name);
828
829 fputc('\n', output);
830 continue;
831 }
832
833 if (nsec_counter(counter))
834 nsec_printout(cpu, counter, val);
835 else
836 abs_printout(cpu, counter, val);
837
838 if (!csv_output) {
839 print_noise(counter, 1.0);
840
841 if (run != ena)
842 fprintf(output, " (%.2f%%)",
843 100.0 * run / ena);
844 }
845 fputc('\n', output);
846 }
847 }
848
849 static void print_stat(int argc, const char **argv)
850 {
851 struct perf_evsel *counter;
852 int i;
853
854 fflush(stdout);
855
856 if (!csv_output) {
857 fprintf(output, "\n");
858 fprintf(output, " Performance counter stats for ");
859 if (!perf_target__has_task(&target)) {
860 fprintf(output, "\'%s", argv[0]);
861 for (i = 1; i < argc; i++)
862 fprintf(output, " %s", argv[i]);
863 } else if (target.pid)
864 fprintf(output, "process id \'%s", target.pid);
865 else
866 fprintf(output, "thread id \'%s", target.tid);
867
868 fprintf(output, "\'");
869 if (run_count > 1)
870 fprintf(output, " (%d runs)", run_count);
871 fprintf(output, ":\n\n");
872 }
873
874 if (no_aggr) {
875 list_for_each_entry(counter, &evsel_list->entries, node)
876 print_counter(counter);
877 } else {
878 list_for_each_entry(counter, &evsel_list->entries, node)
879 print_counter_aggr(counter);
880 }
881
882 if (!csv_output) {
883 if (!null_run)
884 fprintf(output, "\n");
885 fprintf(output, " %17.9f seconds time elapsed",
886 avg_stats(&walltime_nsecs_stats)/1e9);
887 if (run_count > 1) {
888 fprintf(output, " ");
889 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
890 avg_stats(&walltime_nsecs_stats));
891 }
892 fprintf(output, "\n\n");
893 }
894 }
895
896 static volatile int signr = -1;
897
898 static void skip_signal(int signo)
899 {
900 if(child_pid == -1)
901 done = 1;
902
903 signr = signo;
904 }
905
906 static void sig_atexit(void)
907 {
908 if (child_pid != -1)
909 kill(child_pid, SIGTERM);
910
911 if (signr == -1)
912 return;
913
914 signal(signr, SIG_DFL);
915 kill(getpid(), signr);
916 }
917
918 static int stat__set_big_num(const struct option *opt __maybe_unused,
919 const char *s __maybe_unused, int unset)
920 {
921 big_num_opt = unset ? 0 : 1;
922 return 0;
923 }
924
925 /*
926 * Add default attributes, if there were no attributes specified or
927 * if -d/--detailed, -d -d or -d -d -d is used:
928 */
929 static int add_default_attributes(void)
930 {
931 struct perf_event_attr default_attrs[] = {
932
933 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
934 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
935 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
936 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
937
938 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
939 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
940 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
941 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
942 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
943 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
944
945 };
946
947 /*
948 * Detailed stats (-d), covering the L1 and last level data caches:
949 */
950 struct perf_event_attr detailed_attrs[] = {
951
952 { .type = PERF_TYPE_HW_CACHE,
953 .config =
954 PERF_COUNT_HW_CACHE_L1D << 0 |
955 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
956 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
957
958 { .type = PERF_TYPE_HW_CACHE,
959 .config =
960 PERF_COUNT_HW_CACHE_L1D << 0 |
961 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
962 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
963
964 { .type = PERF_TYPE_HW_CACHE,
965 .config =
966 PERF_COUNT_HW_CACHE_LL << 0 |
967 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
968 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
969
970 { .type = PERF_TYPE_HW_CACHE,
971 .config =
972 PERF_COUNT_HW_CACHE_LL << 0 |
973 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
974 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
975 };
976
977 /*
978 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
979 */
980 struct perf_event_attr very_detailed_attrs[] = {
981
982 { .type = PERF_TYPE_HW_CACHE,
983 .config =
984 PERF_COUNT_HW_CACHE_L1I << 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_L1I << 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_DTLB << 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_DTLB << 0 |
1003 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1004 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1005
1006 { .type = PERF_TYPE_HW_CACHE,
1007 .config =
1008 PERF_COUNT_HW_CACHE_ITLB << 0 |
1009 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1010 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1011
1012 { .type = PERF_TYPE_HW_CACHE,
1013 .config =
1014 PERF_COUNT_HW_CACHE_ITLB << 0 |
1015 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1016 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1017
1018 };
1019
1020 /*
1021 * Very, very detailed stats (-d -d -d), adding prefetch events:
1022 */
1023 struct perf_event_attr very_very_detailed_attrs[] = {
1024
1025 { .type = PERF_TYPE_HW_CACHE,
1026 .config =
1027 PERF_COUNT_HW_CACHE_L1D << 0 |
1028 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1029 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1030
1031 { .type = PERF_TYPE_HW_CACHE,
1032 .config =
1033 PERF_COUNT_HW_CACHE_L1D << 0 |
1034 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1035 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1036 };
1037
1038 /* Set attrs if no event is selected and !null_run: */
1039 if (null_run)
1040 return 0;
1041
1042 if (!evsel_list->nr_entries) {
1043 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1044 return -1;
1045 }
1046
1047 /* Detailed events get appended to the event list: */
1048
1049 if (detailed_run < 1)
1050 return 0;
1051
1052 /* Append detailed run extra attributes: */
1053 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1054 return -1;
1055
1056 if (detailed_run < 2)
1057 return 0;
1058
1059 /* Append very detailed run extra attributes: */
1060 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1061 return -1;
1062
1063 if (detailed_run < 3)
1064 return 0;
1065
1066 /* Append very, very detailed run extra attributes: */
1067 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1068 }
1069
1070 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1071 {
1072 bool append_file = false,
1073 sync_run = false;
1074 int output_fd = 0;
1075 const char *output_name = NULL;
1076 const struct option options[] = {
1077 OPT_CALLBACK('e', "event", &evsel_list, "event",
1078 "event selector. use 'perf list' to list available events",
1079 parse_events_option),
1080 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1081 "event filter", parse_filter),
1082 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1083 "child tasks do not inherit counters"),
1084 OPT_STRING('p', "pid", &target.pid, "pid",
1085 "stat events on existing process id"),
1086 OPT_STRING('t', "tid", &target.tid, "tid",
1087 "stat events on existing thread id"),
1088 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1089 "system-wide collection from all CPUs"),
1090 OPT_BOOLEAN('g', "group", &group,
1091 "put the counters into a counter group"),
1092 OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1093 OPT_INCR('v', "verbose", &verbose,
1094 "be more verbose (show counter open errors, etc)"),
1095 OPT_INTEGER('r', "repeat", &run_count,
1096 "repeat command and print average + stddev (max: 100)"),
1097 OPT_BOOLEAN('n', "null", &null_run,
1098 "null run - dont start any counters"),
1099 OPT_INCR('d', "detailed", &detailed_run,
1100 "detailed run - start a lot of events"),
1101 OPT_BOOLEAN('S', "sync", &sync_run,
1102 "call sync() before starting a run"),
1103 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1104 "print large numbers with thousands\' separators",
1105 stat__set_big_num),
1106 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1107 "list of cpus to monitor in system-wide"),
1108 OPT_BOOLEAN('A', "no-aggr", &no_aggr, "disable CPU count aggregation"),
1109 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1110 "print counts with custom separator"),
1111 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1112 "monitor event in cgroup name only", parse_cgroups),
1113 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1114 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1115 OPT_INTEGER(0, "log-fd", &output_fd,
1116 "log output to fd, instead of stderr"),
1117 OPT_END()
1118 };
1119 const char * const stat_usage[] = {
1120 "perf stat [<options>] [<command>]",
1121 NULL
1122 };
1123 struct perf_evsel *pos;
1124 int status = -ENOMEM, run_idx;
1125 const char *mode;
1126
1127 setlocale(LC_ALL, "");
1128
1129 evsel_list = perf_evlist__new(NULL, NULL);
1130 if (evsel_list == NULL)
1131 return -ENOMEM;
1132
1133 argc = parse_options(argc, argv, options, stat_usage,
1134 PARSE_OPT_STOP_AT_NON_OPTION);
1135
1136 output = stderr;
1137 if (output_name && strcmp(output_name, "-"))
1138 output = NULL;
1139
1140 if (output_name && output_fd) {
1141 fprintf(stderr, "cannot use both --output and --log-fd\n");
1142 usage_with_options(stat_usage, options);
1143 }
1144
1145 if (output_fd < 0) {
1146 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1147 usage_with_options(stat_usage, options);
1148 }
1149
1150 if (!output) {
1151 struct timespec tm;
1152 mode = append_file ? "a" : "w";
1153
1154 output = fopen(output_name, mode);
1155 if (!output) {
1156 perror("failed to create output file");
1157 return -1;
1158 }
1159 clock_gettime(CLOCK_REALTIME, &tm);
1160 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1161 } else if (output_fd > 0) {
1162 mode = append_file ? "a" : "w";
1163 output = fdopen(output_fd, mode);
1164 if (!output) {
1165 perror("Failed opening logfd");
1166 return -errno;
1167 }
1168 }
1169
1170 if (csv_sep) {
1171 csv_output = true;
1172 if (!strcmp(csv_sep, "\\t"))
1173 csv_sep = "\t";
1174 } else
1175 csv_sep = DEFAULT_SEPARATOR;
1176
1177 /*
1178 * let the spreadsheet do the pretty-printing
1179 */
1180 if (csv_output) {
1181 /* User explicitly passed -B? */
1182 if (big_num_opt == 1) {
1183 fprintf(stderr, "-B option not supported with -x\n");
1184 usage_with_options(stat_usage, options);
1185 } else /* Nope, so disable big number formatting */
1186 big_num = false;
1187 } else if (big_num_opt == 0) /* User passed --no-big-num */
1188 big_num = false;
1189
1190 if (!argc && !perf_target__has_task(&target))
1191 usage_with_options(stat_usage, options);
1192 if (run_count <= 0)
1193 usage_with_options(stat_usage, options);
1194
1195 /* no_aggr, cgroup are for system-wide only */
1196 if ((no_aggr || nr_cgroups) && !perf_target__has_cpu(&target)) {
1197 fprintf(stderr, "both cgroup and no-aggregation "
1198 "modes only available in system-wide mode\n");
1199
1200 usage_with_options(stat_usage, options);
1201 }
1202
1203 if (add_default_attributes())
1204 goto out;
1205
1206 perf_target__validate(&target);
1207
1208 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1209 if (perf_target__has_task(&target))
1210 pr_err("Problems finding threads of monitor\n");
1211 if (perf_target__has_cpu(&target))
1212 perror("failed to parse CPUs map");
1213
1214 usage_with_options(stat_usage, options);
1215 return -1;
1216 }
1217
1218 list_for_each_entry(pos, &evsel_list->entries, node) {
1219 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1220 perf_evsel__alloc_counts(pos, perf_evsel__nr_cpus(pos)) < 0)
1221 goto out_free_fd;
1222 }
1223
1224 /*
1225 * We dont want to block the signals - that would cause
1226 * child tasks to inherit that and Ctrl-C would not work.
1227 * What we want is for Ctrl-C to work in the exec()-ed
1228 * task, but being ignored by perf stat itself:
1229 */
1230 atexit(sig_atexit);
1231 signal(SIGINT, skip_signal);
1232 signal(SIGALRM, skip_signal);
1233 signal(SIGABRT, skip_signal);
1234
1235 status = 0;
1236 for (run_idx = 0; run_idx < run_count; run_idx++) {
1237 if (run_count != 1 && verbose)
1238 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1239 run_idx + 1);
1240
1241 if (sync_run)
1242 sync();
1243
1244 status = run_perf_stat(argc, argv);
1245 }
1246
1247 if (status != -1)
1248 print_stat(argc, argv);
1249 out_free_fd:
1250 list_for_each_entry(pos, &evsel_list->entries, node)
1251 perf_evsel__free_stat_priv(pos);
1252 perf_evlist__delete_maps(evsel_list);
1253 out:
1254 perf_evlist__delete(evsel_list);
1255 return status;
1256 }
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