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Merge branch 'perf/urgent'
[linux-2.6/x86.git] / tools / perf / builtin-stat.c
blob1ad04ce29c3479828c8a91b2a13efbaaf871a3f2
1 /*
2 * builtin-stat.c
3 *
4 * Builtin stat command: Give a precise performance counters summary
5 * overview about any workload, CPU or specific PID.
6 *
7 * Sample output:
8
9 $ perf stat ./hackbench 10
10
11 Time: 0.118
12
13 Performance counter stats for './hackbench 10':
14
15 1708.761321 task-clock # 11.037 CPUs utilized
16 41,190 context-switches # 0.024 M/sec
17 6,735 CPU-migrations # 0.004 M/sec
18 17,318 page-faults # 0.010 M/sec
19 5,205,202,243 cycles # 3.046 GHz
20 3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle
21 1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle
22 2,603,501,247 instructions # 0.50 insns per cycle
23 # 1.48 stalled cycles per insn
24 484,357,498 branches # 283.455 M/sec
25 6,388,934 branch-misses # 1.32% of all branches
26
27 0.154822978 seconds time elapsed
28
29 *
30 * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
31 *
32 * Improvements and fixes by:
33 *
34 * Arjan van de Ven <arjan@linux.intel.com>
35 * Yanmin Zhang <yanmin.zhang@intel.com>
36 * Wu Fengguang <fengguang.wu@intel.com>
37 * Mike Galbraith <efault@gmx.de>
38 * Paul Mackerras <paulus@samba.org>
39 * Jaswinder Singh Rajput <jaswinder@kernel.org>
40 *
41 * Released under the GPL v2. (and only v2, not any later version)
42 */
43
44 #include "perf.h"
45 #include "builtin.h"
46 #include "util/util.h"
47 #include "util/parse-options.h"
48 #include "util/parse-events.h"
49 #include "util/event.h"
50 #include "util/evlist.h"
51 #include "util/evsel.h"
52 #include "util/debug.h"
53 #include "util/color.h"
54 #include "util/header.h"
55 #include "util/cpumap.h"
56 #include "util/thread.h"
57 #include "util/thread_map.h"
58
59 #include <sys/prctl.h>
60 #include <math.h>
61 #include <locale.h>
62
63 #define DEFAULT_SEPARATOR " "
64 #define CNTR_NOT_SUPPORTED "<not supported>"
65 #define CNTR_NOT_COUNTED "<not counted>"
66
67 static struct perf_event_attr default_attrs[] = {
68
69 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
70 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
71 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
72 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
73
74 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
75 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
76 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
77 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
78 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
79 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
80
81 };
82
83 /*
84 * Detailed stats (-d), covering the L1 and last level data caches:
85 */
86 static struct perf_event_attr detailed_attrs[] = {
87
88 { .type = PERF_TYPE_HW_CACHE,
89 .config =
90 PERF_COUNT_HW_CACHE_L1D << 0 |
91 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
92 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
93
94 { .type = PERF_TYPE_HW_CACHE,
95 .config =
96 PERF_COUNT_HW_CACHE_L1D << 0 |
97 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
98 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
99
100 { .type = PERF_TYPE_HW_CACHE,
101 .config =
102 PERF_COUNT_HW_CACHE_LL << 0 |
103 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
104 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
105
106 { .type = PERF_TYPE_HW_CACHE,
107 .config =
108 PERF_COUNT_HW_CACHE_LL << 0 |
109 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
110 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
111 };
112
113 /*
114 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
115 */
116 static struct perf_event_attr very_detailed_attrs[] = {
117
118 { .type = PERF_TYPE_HW_CACHE,
119 .config =
120 PERF_COUNT_HW_CACHE_L1I << 0 |
121 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
122 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
123
124 { .type = PERF_TYPE_HW_CACHE,
125 .config =
126 PERF_COUNT_HW_CACHE_L1I << 0 |
127 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
128 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
129
130 { .type = PERF_TYPE_HW_CACHE,
131 .config =
132 PERF_COUNT_HW_CACHE_DTLB << 0 |
133 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
134 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
135
136 { .type = PERF_TYPE_HW_CACHE,
137 .config =
138 PERF_COUNT_HW_CACHE_DTLB << 0 |
139 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
140 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
141
142 { .type = PERF_TYPE_HW_CACHE,
143 .config =
144 PERF_COUNT_HW_CACHE_ITLB << 0 |
145 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
146 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
147
148 { .type = PERF_TYPE_HW_CACHE,
149 .config =
150 PERF_COUNT_HW_CACHE_ITLB << 0 |
151 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
152 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
153
154 };
155
156 /*
157 * Very, very detailed stats (-d -d -d), adding prefetch events:
158 */
159 static struct perf_event_attr very_very_detailed_attrs[] = {
160
161 { .type = PERF_TYPE_HW_CACHE,
162 .config =
163 PERF_COUNT_HW_CACHE_L1D << 0 |
164 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
165 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
166
167 { .type = PERF_TYPE_HW_CACHE,
168 .config =
169 PERF_COUNT_HW_CACHE_L1D << 0 |
170 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
171 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
172 };
173
174
175
176 struct perf_evlist *evsel_list;
177
178 static bool system_wide = false;
179 static int run_idx = 0;
180
181 static int run_count = 1;
182 static bool no_inherit = false;
183 static bool scale = true;
184 static bool no_aggr = false;
185 static pid_t target_pid = -1;
186 static pid_t target_tid = -1;
187 static pid_t child_pid = -1;
188 static bool null_run = false;
189 static int detailed_run = 0;
190 static bool sync_run = false;
191 static bool big_num = true;
192 static int big_num_opt = -1;
193 static const char *cpu_list;
194 static const char *csv_sep = NULL;
195 static bool csv_output = false;
196
197 static volatile int done = 0;
198
199 struct stats
200 {
201 double n, mean, M2;
202 };
203
204 struct perf_stat {
205 struct stats res_stats[3];
206 };
207
208 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
209 {
210 evsel->priv = zalloc(sizeof(struct perf_stat));
211 return evsel->priv == NULL ? -ENOMEM : 0;
212 }
213
214 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
215 {
216 free(evsel->priv);
217 evsel->priv = NULL;
218 }
219
220 static void update_stats(struct stats *stats, u64 val)
221 {
222 double delta;
223
224 stats->n++;
225 delta = val - stats->mean;
226 stats->mean += delta / stats->n;
227 stats->M2 += delta*(val - stats->mean);
228 }
229
230 static double avg_stats(struct stats *stats)
231 {
232 return stats->mean;
233 }
234
235 /*
236 * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
237 *
238 * (\Sum n_i^2) - ((\Sum n_i)^2)/n
239 * s^2 = -------------------------------
240 * n - 1
241 *
242 * http://en.wikipedia.org/wiki/Stddev
243 *
244 * The std dev of the mean is related to the std dev by:
245 *
246 * s
247 * s_mean = -------
248 * sqrt(n)
249 *
250 */
251 static double stddev_stats(struct stats *stats)
252 {
253 double variance = stats->M2 / (stats->n - 1);
254 double variance_mean = variance / stats->n;
255
256 return sqrt(variance_mean);
257 }
258
259 struct stats runtime_nsecs_stats[MAX_NR_CPUS];
260 struct stats runtime_cycles_stats[MAX_NR_CPUS];
261 struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
262 struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
263 struct stats runtime_branches_stats[MAX_NR_CPUS];
264 struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
265 struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
266 struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
267 struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
268 struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
269 struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
270 struct stats walltime_nsecs_stats;
271
272 static int create_perf_stat_counter(struct perf_evsel *evsel)
273 {
274 struct perf_event_attr *attr = &evsel->attr;
275
276 if (scale)
277 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
278 PERF_FORMAT_TOTAL_TIME_RUNNING;
279
280 attr->inherit = !no_inherit;
281
282 if (system_wide)
283 return perf_evsel__open_per_cpu(evsel, evsel_list->cpus, false);
284
285 if (target_pid == -1 && target_tid == -1) {
286 attr->disabled = 1;
287 attr->enable_on_exec = 1;
288 }
289
290 return perf_evsel__open_per_thread(evsel, evsel_list->threads, false);
291 }
292
293 /*
294 * Does the counter have nsecs as a unit?
295 */
296 static inline int nsec_counter(struct perf_evsel *evsel)
297 {
298 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
299 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
300 return 1;
301
302 return 0;
303 }
304
305 /*
306 * Update various tracking values we maintain to print
307 * more semantic information such as miss/hit ratios,
308 * instruction rates, etc:
309 */
310 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
311 {
312 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
313 update_stats(&runtime_nsecs_stats[0], count[0]);
314 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
315 update_stats(&runtime_cycles_stats[0], count[0]);
316 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
317 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
318 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
319 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
320 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
321 update_stats(&runtime_branches_stats[0], count[0]);
322 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
323 update_stats(&runtime_cacherefs_stats[0], count[0]);
324 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
325 update_stats(&runtime_l1_dcache_stats[0], count[0]);
326 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
327 update_stats(&runtime_l1_icache_stats[0], count[0]);
328 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
329 update_stats(&runtime_ll_cache_stats[0], count[0]);
330 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
331 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
332 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
333 update_stats(&runtime_itlb_cache_stats[0], count[0]);
334 }
335
336 /*
337 * Read out the results of a single counter:
338 * aggregate counts across CPUs in system-wide mode
339 */
340 static int read_counter_aggr(struct perf_evsel *counter)
341 {
342 struct perf_stat *ps = counter->priv;
343 u64 *count = counter->counts->aggr.values;
344 int i;
345
346 if (__perf_evsel__read(counter, evsel_list->cpus->nr,
347 evsel_list->threads->nr, scale) < 0)
348 return -1;
349
350 for (i = 0; i < 3; i++)
351 update_stats(&ps->res_stats[i], count[i]);
352
353 if (verbose) {
354 fprintf(stderr, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
355 event_name(counter), count[0], count[1], count[2]);
356 }
357
358 /*
359 * Save the full runtime - to allow normalization during printout:
360 */
361 update_shadow_stats(counter, count);
362
363 return 0;
364 }
365
366 /*
367 * Read out the results of a single counter:
368 * do not aggregate counts across CPUs in system-wide mode
369 */
370 static int read_counter(struct perf_evsel *counter)
371 {
372 u64 *count;
373 int cpu;
374
375 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
376 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
377 return -1;
378
379 count = counter->counts->cpu[cpu].values;
380
381 update_shadow_stats(counter, count);
382 }
383
384 return 0;
385 }
386
387 static int run_perf_stat(int argc __used, const char **argv)
388 {
389 unsigned long long t0, t1;
390 struct perf_evsel *counter;
391 int status = 0;
392 int child_ready_pipe[2], go_pipe[2];
393 const bool forks = (argc > 0);
394 char buf;
395
396 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
397 perror("failed to create pipes");
398 exit(1);
399 }
400
401 if (forks) {
402 if ((child_pid = fork()) < 0)
403 perror("failed to fork");
404
405 if (!child_pid) {
406 close(child_ready_pipe[0]);
407 close(go_pipe[1]);
408 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
409
410 /*
411 * Do a dummy execvp to get the PLT entry resolved,
412 * so we avoid the resolver overhead on the real
413 * execvp call.
414 */
415 execvp("", (char **)argv);
416
417 /*
418 * Tell the parent we're ready to go
419 */
420 close(child_ready_pipe[1]);
421
422 /*
423 * Wait until the parent tells us to go.
424 */
425 if (read(go_pipe[0], &buf, 1) == -1)
426 perror("unable to read pipe");
427
428 execvp(argv[0], (char **)argv);
429
430 perror(argv[0]);
431 exit(-1);
432 }
433
434 if (target_tid == -1 && target_pid == -1 && !system_wide)
435 evsel_list->threads->map[0] = child_pid;
436
437 /*
438 * Wait for the child to be ready to exec.
439 */
440 close(child_ready_pipe[1]);
441 close(go_pipe[0]);
442 if (read(child_ready_pipe[0], &buf, 1) == -1)
443 perror("unable to read pipe");
444 close(child_ready_pipe[0]);
445 }
446
447 list_for_each_entry(counter, &evsel_list->entries, node) {
448 if (create_perf_stat_counter(counter) < 0) {
449 if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) {
450 if (verbose)
451 ui__warning("%s event is not supported by the kernel.\n",
452 event_name(counter));
453 counter->supported = false;
454 continue;
455 }
456
457 if (errno == EPERM || errno == EACCES) {
458 error("You may not have permission to collect %sstats.\n"
459 "\t Consider tweaking"
460 " /proc/sys/kernel/perf_event_paranoid or running as root.",
461 system_wide ? "system-wide " : "");
462 } else {
463 error("open_counter returned with %d (%s). "
464 "/bin/dmesg may provide additional information.\n",
465 errno, strerror(errno));
466 }
467 if (child_pid != -1)
468 kill(child_pid, SIGTERM);
469 die("Not all events could be opened.\n");
470 return -1;
471 }
472 counter->supported = true;
473 }
474
475 if (perf_evlist__set_filters(evsel_list)) {
476 error("failed to set filter with %d (%s)\n", errno,
477 strerror(errno));
478 return -1;
479 }
480
481 /*
482 * Enable counters and exec the command:
483 */
484 t0 = rdclock();
485
486 if (forks) {
487 close(go_pipe[1]);
488 wait(&status);
489 } else {
490 while(!done) sleep(1);
491 }
492
493 t1 = rdclock();
494
495 update_stats(&walltime_nsecs_stats, t1 - t0);
496
497 if (no_aggr) {
498 list_for_each_entry(counter, &evsel_list->entries, node) {
499 read_counter(counter);
500 perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
501 }
502 } else {
503 list_for_each_entry(counter, &evsel_list->entries, node) {
504 read_counter_aggr(counter);
505 perf_evsel__close_fd(counter, evsel_list->cpus->nr,
506 evsel_list->threads->nr);
507 }
508 }
509
510 return WEXITSTATUS(status);
511 }
512
513 static void print_noise_pct(double total, double avg)
514 {
515 double pct = 0.0;
516
517 if (avg)
518 pct = 100.0*total/avg;
519
520 if (csv_output)
521 fprintf(stderr, "%s%.2f%%", csv_sep, pct);
522 else
523 fprintf(stderr, " ( +-%6.2f%% )", pct);
524 }
525
526 static void print_noise(struct perf_evsel *evsel, double avg)
527 {
528 struct perf_stat *ps;
529
530 if (run_count == 1)
531 return;
532
533 ps = evsel->priv;
534 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
535 }
536
537 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
538 {
539 double msecs = avg / 1e6;
540 char cpustr[16] = { '\0', };
541 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
542
543 if (no_aggr)
544 sprintf(cpustr, "CPU%*d%s",
545 csv_output ? 0 : -4,
546 evsel_list->cpus->map[cpu], csv_sep);
547
548 fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel));
549
550 if (evsel->cgrp)
551 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
552
553 if (csv_output)
554 return;
555
556 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
557 fprintf(stderr, " # %8.3f CPUs utilized ", avg / avg_stats(&walltime_nsecs_stats));
558 }
559
560 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
561 {
562 double total, ratio = 0.0;
563 const char *color;
564
565 total = avg_stats(&runtime_cycles_stats[cpu]);
566
567 if (total)
568 ratio = avg / total * 100.0;
569
570 color = PERF_COLOR_NORMAL;
571 if (ratio > 50.0)
572 color = PERF_COLOR_RED;
573 else if (ratio > 30.0)
574 color = PERF_COLOR_MAGENTA;
575 else if (ratio > 10.0)
576 color = PERF_COLOR_YELLOW;
577
578 fprintf(stderr, " # ");
579 color_fprintf(stderr, color, "%6.2f%%", ratio);
580 fprintf(stderr, " frontend cycles idle ");
581 }
582
583 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
584 {
585 double total, ratio = 0.0;
586 const char *color;
587
588 total = avg_stats(&runtime_cycles_stats[cpu]);
589
590 if (total)
591 ratio = avg / total * 100.0;
592
593 color = PERF_COLOR_NORMAL;
594 if (ratio > 75.0)
595 color = PERF_COLOR_RED;
596 else if (ratio > 50.0)
597 color = PERF_COLOR_MAGENTA;
598 else if (ratio > 20.0)
599 color = PERF_COLOR_YELLOW;
600
601 fprintf(stderr, " # ");
602 color_fprintf(stderr, color, "%6.2f%%", ratio);
603 fprintf(stderr, " backend cycles idle ");
604 }
605
606 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
607 {
608 double total, ratio = 0.0;
609 const char *color;
610
611 total = avg_stats(&runtime_branches_stats[cpu]);
612
613 if (total)
614 ratio = avg / total * 100.0;
615
616 color = PERF_COLOR_NORMAL;
617 if (ratio > 20.0)
618 color = PERF_COLOR_RED;
619 else if (ratio > 10.0)
620 color = PERF_COLOR_MAGENTA;
621 else if (ratio > 5.0)
622 color = PERF_COLOR_YELLOW;
623
624 fprintf(stderr, " # ");
625 color_fprintf(stderr, color, "%6.2f%%", ratio);
626 fprintf(stderr, " of all branches ");
627 }
628
629 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
630 {
631 double total, ratio = 0.0;
632 const char *color;
633
634 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
635
636 if (total)
637 ratio = avg / total * 100.0;
638
639 color = PERF_COLOR_NORMAL;
640 if (ratio > 20.0)
641 color = PERF_COLOR_RED;
642 else if (ratio > 10.0)
643 color = PERF_COLOR_MAGENTA;
644 else if (ratio > 5.0)
645 color = PERF_COLOR_YELLOW;
646
647 fprintf(stderr, " # ");
648 color_fprintf(stderr, color, "%6.2f%%", ratio);
649 fprintf(stderr, " of all L1-dcache hits ");
650 }
651
652 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
653 {
654 double total, ratio = 0.0;
655 const char *color;
656
657 total = avg_stats(&runtime_l1_icache_stats[cpu]);
658
659 if (total)
660 ratio = avg / total * 100.0;
661
662 color = PERF_COLOR_NORMAL;
663 if (ratio > 20.0)
664 color = PERF_COLOR_RED;
665 else if (ratio > 10.0)
666 color = PERF_COLOR_MAGENTA;
667 else if (ratio > 5.0)
668 color = PERF_COLOR_YELLOW;
669
670 fprintf(stderr, " # ");
671 color_fprintf(stderr, color, "%6.2f%%", ratio);
672 fprintf(stderr, " of all L1-icache hits ");
673 }
674
675 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
676 {
677 double total, ratio = 0.0;
678 const char *color;
679
680 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
681
682 if (total)
683 ratio = avg / total * 100.0;
684
685 color = PERF_COLOR_NORMAL;
686 if (ratio > 20.0)
687 color = PERF_COLOR_RED;
688 else if (ratio > 10.0)
689 color = PERF_COLOR_MAGENTA;
690 else if (ratio > 5.0)
691 color = PERF_COLOR_YELLOW;
692
693 fprintf(stderr, " # ");
694 color_fprintf(stderr, color, "%6.2f%%", ratio);
695 fprintf(stderr, " of all dTLB cache hits ");
696 }
697
698 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
699 {
700 double total, ratio = 0.0;
701 const char *color;
702
703 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
704
705 if (total)
706 ratio = avg / total * 100.0;
707
708 color = PERF_COLOR_NORMAL;
709 if (ratio > 20.0)
710 color = PERF_COLOR_RED;
711 else if (ratio > 10.0)
712 color = PERF_COLOR_MAGENTA;
713 else if (ratio > 5.0)
714 color = PERF_COLOR_YELLOW;
715
716 fprintf(stderr, " # ");
717 color_fprintf(stderr, color, "%6.2f%%", ratio);
718 fprintf(stderr, " of all iTLB cache hits ");
719 }
720
721 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
722 {
723 double total, ratio = 0.0;
724 const char *color;
725
726 total = avg_stats(&runtime_ll_cache_stats[cpu]);
727
728 if (total)
729 ratio = avg / total * 100.0;
730
731 color = PERF_COLOR_NORMAL;
732 if (ratio > 20.0)
733 color = PERF_COLOR_RED;
734 else if (ratio > 10.0)
735 color = PERF_COLOR_MAGENTA;
736 else if (ratio > 5.0)
737 color = PERF_COLOR_YELLOW;
738
739 fprintf(stderr, " # ");
740 color_fprintf(stderr, color, "%6.2f%%", ratio);
741 fprintf(stderr, " of all LL-cache hits ");
742 }
743
744 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
745 {
746 double total, ratio = 0.0;
747 char cpustr[16] = { '\0', };
748 const char *fmt;
749
750 if (csv_output)
751 fmt = "%s%.0f%s%s";
752 else if (big_num)
753 fmt = "%s%'18.0f%s%-25s";
754 else
755 fmt = "%s%18.0f%s%-25s";
756
757 if (no_aggr)
758 sprintf(cpustr, "CPU%*d%s",
759 csv_output ? 0 : -4,
760 evsel_list->cpus->map[cpu], csv_sep);
761 else
762 cpu = 0;
763
764 fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel));
765
766 if (evsel->cgrp)
767 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
768
769 if (csv_output)
770 return;
771
772 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
773 total = avg_stats(&runtime_cycles_stats[cpu]);
774
775 if (total)
776 ratio = avg / total;
777
778 fprintf(stderr, " # %5.2f insns per cycle ", ratio);
779
780 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
781 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
782
783 if (total && avg) {
784 ratio = total / avg;
785 fprintf(stderr, "\n # %5.2f stalled cycles per insn", ratio);
786 }
787
788 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
789 runtime_branches_stats[cpu].n != 0) {
790 print_branch_misses(cpu, evsel, avg);
791 } else if (
792 evsel->attr.type == PERF_TYPE_HW_CACHE &&
793 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
794 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
795 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
796 runtime_l1_dcache_stats[cpu].n != 0) {
797 print_l1_dcache_misses(cpu, evsel, avg);
798 } else if (
799 evsel->attr.type == PERF_TYPE_HW_CACHE &&
800 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
801 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
802 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
803 runtime_l1_icache_stats[cpu].n != 0) {
804 print_l1_icache_misses(cpu, evsel, avg);
805 } else if (
806 evsel->attr.type == PERF_TYPE_HW_CACHE &&
807 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
808 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
809 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
810 runtime_dtlb_cache_stats[cpu].n != 0) {
811 print_dtlb_cache_misses(cpu, evsel, avg);
812 } else if (
813 evsel->attr.type == PERF_TYPE_HW_CACHE &&
814 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
815 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
816 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
817 runtime_itlb_cache_stats[cpu].n != 0) {
818 print_itlb_cache_misses(cpu, evsel, avg);
819 } else if (
820 evsel->attr.type == PERF_TYPE_HW_CACHE &&
821 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
822 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
823 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
824 runtime_ll_cache_stats[cpu].n != 0) {
825 print_ll_cache_misses(cpu, evsel, avg);
826 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
827 runtime_cacherefs_stats[cpu].n != 0) {
828 total = avg_stats(&runtime_cacherefs_stats[cpu]);
829
830 if (total)
831 ratio = avg * 100 / total;
832
833 fprintf(stderr, " # %8.3f %% of all cache refs ", ratio);
834
835 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
836 print_stalled_cycles_frontend(cpu, evsel, avg);
837 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
838 print_stalled_cycles_backend(cpu, evsel, avg);
839 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
840 total = avg_stats(&runtime_nsecs_stats[cpu]);
841
842 if (total)
843 ratio = 1.0 * avg / total;
844
845 fprintf(stderr, " # %8.3f GHz ", ratio);
846 } else if (runtime_nsecs_stats[cpu].n != 0) {
847 total = avg_stats(&runtime_nsecs_stats[cpu]);
848
849 if (total)
850 ratio = 1000.0 * avg / total;
851
852 fprintf(stderr, " # %8.3f M/sec ", ratio);
853 } else {
854 fprintf(stderr, " ");
855 }
856 }
857
858 /*
859 * Print out the results of a single counter:
860 * aggregated counts in system-wide mode
861 */
862 static void print_counter_aggr(struct perf_evsel *counter)
863 {
864 struct perf_stat *ps = counter->priv;
865 double avg = avg_stats(&ps->res_stats[0]);
866 int scaled = counter->counts->scaled;
867
868 if (scaled == -1) {
869 fprintf(stderr, "%*s%s%*s",
870 csv_output ? 0 : 18,
871 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
872 csv_sep,
873 csv_output ? 0 : -24,
874 event_name(counter));
875
876 if (counter->cgrp)
877 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
878
879 fputc('\n', stderr);
880 return;
881 }
882
883 if (nsec_counter(counter))
884 nsec_printout(-1, counter, avg);
885 else
886 abs_printout(-1, counter, avg);
887
888 print_noise(counter, avg);
889
890 if (csv_output) {
891 fputc('\n', stderr);
892 return;
893 }
894
895 if (scaled) {
896 double avg_enabled, avg_running;
897
898 avg_enabled = avg_stats(&ps->res_stats[1]);
899 avg_running = avg_stats(&ps->res_stats[2]);
900
901 fprintf(stderr, " [%5.2f%%]", 100 * avg_running / avg_enabled);
902 }
903 fprintf(stderr, "\n");
904 }
905
906 /*
907 * Print out the results of a single counter:
908 * does not use aggregated count in system-wide
909 */
910 static void print_counter(struct perf_evsel *counter)
911 {
912 u64 ena, run, val;
913 int cpu;
914
915 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
916 val = counter->counts->cpu[cpu].val;
917 ena = counter->counts->cpu[cpu].ena;
918 run = counter->counts->cpu[cpu].run;
919 if (run == 0 || ena == 0) {
920 fprintf(stderr, "CPU%*d%s%*s%s%*s",
921 csv_output ? 0 : -4,
922 evsel_list->cpus->map[cpu], csv_sep,
923 csv_output ? 0 : 18,
924 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
925 csv_sep,
926 csv_output ? 0 : -24,
927 event_name(counter));
928
929 if (counter->cgrp)
930 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
931
932 fputc('\n', stderr);
933 continue;
934 }
935
936 if (nsec_counter(counter))
937 nsec_printout(cpu, counter, val);
938 else
939 abs_printout(cpu, counter, val);
940
941 if (!csv_output) {
942 print_noise(counter, 1.0);
943
944 if (run != ena)
945 fprintf(stderr, " (%.2f%%)", 100.0 * run / ena);
946 }
947 fputc('\n', stderr);
948 }
949 }
950
951 static void print_stat(int argc, const char **argv)
952 {
953 struct perf_evsel *counter;
954 int i;
955
956 fflush(stdout);
957
958 if (!csv_output) {
959 fprintf(stderr, "\n");
960 fprintf(stderr, " Performance counter stats for ");
961 if(target_pid == -1 && target_tid == -1) {
962 fprintf(stderr, "\'%s", argv[0]);
963 for (i = 1; i < argc; i++)
964 fprintf(stderr, " %s", argv[i]);
965 } else if (target_pid != -1)
966 fprintf(stderr, "process id \'%d", target_pid);
967 else
968 fprintf(stderr, "thread id \'%d", target_tid);
969
970 fprintf(stderr, "\'");
971 if (run_count > 1)
972 fprintf(stderr, " (%d runs)", run_count);
973 fprintf(stderr, ":\n\n");
974 }
975
976 if (no_aggr) {
977 list_for_each_entry(counter, &evsel_list->entries, node)
978 print_counter(counter);
979 } else {
980 list_for_each_entry(counter, &evsel_list->entries, node)
981 print_counter_aggr(counter);
982 }
983
984 if (!csv_output) {
985 if (!null_run)
986 fprintf(stderr, "\n");
987 fprintf(stderr, " %17.9f seconds time elapsed",
988 avg_stats(&walltime_nsecs_stats)/1e9);
989 if (run_count > 1) {
990 fprintf(stderr, " ");
991 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
992 avg_stats(&walltime_nsecs_stats));
993 }
994 fprintf(stderr, "\n\n");
995 }
996 }
997
998 static volatile int signr = -1;
999
1000 static void skip_signal(int signo)
1001 {
1002 if(child_pid == -1)
1003 done = 1;
1004
1005 signr = signo;
1006 }
1007
1008 static void sig_atexit(void)
1009 {
1010 if (child_pid != -1)
1011 kill(child_pid, SIGTERM);
1012
1013 if (signr == -1)
1014 return;
1015
1016 signal(signr, SIG_DFL);
1017 kill(getpid(), signr);
1018 }
1019
1020 static const char * const stat_usage[] = {
1021 "perf stat [<options>] [<command>]",
1022 NULL
1023 };
1024
1025 static int stat__set_big_num(const struct option *opt __used,
1026 const char *s __used, int unset)
1027 {
1028 big_num_opt = unset ? 0 : 1;
1029 return 0;
1030 }
1031
1032 static const struct option options[] = {
1033 OPT_CALLBACK('e', "event", &evsel_list, "event",
1034 "event selector. use 'perf list' to list available events",
1035 parse_events_option),
1036 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1037 "event filter", parse_filter),
1038 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1039 "child tasks do not inherit counters"),
1040 OPT_INTEGER('p', "pid", &target_pid,
1041 "stat events on existing process id"),
1042 OPT_INTEGER('t', "tid", &target_tid,
1043 "stat events on existing thread id"),
1044 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1045 "system-wide collection from all CPUs"),
1046 OPT_BOOLEAN('c', "scale", &scale,
1047 "scale/normalize counters"),
1048 OPT_INCR('v', "verbose", &verbose,
1049 "be more verbose (show counter open errors, etc)"),
1050 OPT_INTEGER('r', "repeat", &run_count,
1051 "repeat command and print average + stddev (max: 100)"),
1052 OPT_BOOLEAN('n', "null", &null_run,
1053 "null run - dont start any counters"),
1054 OPT_INCR('d', "detailed", &detailed_run,
1055 "detailed run - start a lot of events"),
1056 OPT_BOOLEAN('S', "sync", &sync_run,
1057 "call sync() before starting a run"),
1058 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1059 "print large numbers with thousands\' separators",
1060 stat__set_big_num),
1061 OPT_STRING('C', "cpu", &cpu_list, "cpu",
1062 "list of cpus to monitor in system-wide"),
1063 OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1064 "disable CPU count aggregation"),
1065 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1066 "print counts with custom separator"),
1067 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1068 "monitor event in cgroup name only",
1069 parse_cgroups),
1070 OPT_END()
1071 };
1072
1073 /*
1074 * Add default attributes, if there were no attributes specified or
1075 * if -d/--detailed, -d -d or -d -d -d is used:
1076 */
1077 static int add_default_attributes(void)
1078 {
1079 struct perf_evsel *pos;
1080 size_t attr_nr = 0;
1081 size_t c;
1082
1083 /* Set attrs if no event is selected and !null_run: */
1084 if (null_run)
1085 return 0;
1086
1087 if (!evsel_list->nr_entries) {
1088 for (c = 0; c < ARRAY_SIZE(default_attrs); c++) {
1089 pos = perf_evsel__new(default_attrs + c, c + attr_nr);
1090 if (pos == NULL)
1091 return -1;
1092 perf_evlist__add(evsel_list, pos);
1093 }
1094 attr_nr += c;
1095 }
1096
1097 /* Detailed events get appended to the event list: */
1098
1099 if (detailed_run < 1)
1100 return 0;
1101
1102 /* Append detailed run extra attributes: */
1103 for (c = 0; c < ARRAY_SIZE(detailed_attrs); c++) {
1104 pos = perf_evsel__new(detailed_attrs + c, c + attr_nr);
1105 if (pos == NULL)
1106 return -1;
1107 perf_evlist__add(evsel_list, pos);
1108 }
1109 attr_nr += c;
1110
1111 if (detailed_run < 2)
1112 return 0;
1113
1114 /* Append very detailed run extra attributes: */
1115 for (c = 0; c < ARRAY_SIZE(very_detailed_attrs); c++) {
1116 pos = perf_evsel__new(very_detailed_attrs + c, c + attr_nr);
1117 if (pos == NULL)
1118 return -1;
1119 perf_evlist__add(evsel_list, pos);
1120 }
1121
1122 if (detailed_run < 3)
1123 return 0;
1124
1125 /* Append very, very detailed run extra attributes: */
1126 for (c = 0; c < ARRAY_SIZE(very_very_detailed_attrs); c++) {
1127 pos = perf_evsel__new(very_very_detailed_attrs + c, c + attr_nr);
1128 if (pos == NULL)
1129 return -1;
1130 perf_evlist__add(evsel_list, pos);
1131 }
1132
1133
1134 return 0;
1135 }
1136
1137 int cmd_stat(int argc, const char **argv, const char *prefix __used)
1138 {
1139 struct perf_evsel *pos;
1140 int status = -ENOMEM;
1141
1142 setlocale(LC_ALL, "");
1143
1144 evsel_list = perf_evlist__new(NULL, NULL);
1145 if (evsel_list == NULL)
1146 return -ENOMEM;
1147
1148 argc = parse_options(argc, argv, options, stat_usage,
1149 PARSE_OPT_STOP_AT_NON_OPTION);
1150
1151 if (csv_sep)
1152 csv_output = true;
1153 else
1154 csv_sep = DEFAULT_SEPARATOR;
1155
1156 /*
1157 * let the spreadsheet do the pretty-printing
1158 */
1159 if (csv_output) {
1160 /* User explicitely passed -B? */
1161 if (big_num_opt == 1) {
1162 fprintf(stderr, "-B option not supported with -x\n");
1163 usage_with_options(stat_usage, options);
1164 } else /* Nope, so disable big number formatting */
1165 big_num = false;
1166 } else if (big_num_opt == 0) /* User passed --no-big-num */
1167 big_num = false;
1168
1169 if (!argc && target_pid == -1 && target_tid == -1)
1170 usage_with_options(stat_usage, options);
1171 if (run_count <= 0)
1172 usage_with_options(stat_usage, options);
1173
1174 /* no_aggr, cgroup are for system-wide only */
1175 if ((no_aggr || nr_cgroups) && !system_wide) {
1176 fprintf(stderr, "both cgroup and no-aggregation "
1177 "modes only available in system-wide mode\n");
1178
1179 usage_with_options(stat_usage, options);
1180 }
1181
1182 if (add_default_attributes())
1183 goto out;
1184
1185 if (target_pid != -1)
1186 target_tid = target_pid;
1187
1188 evsel_list->threads = thread_map__new(target_pid, target_tid);
1189 if (evsel_list->threads == NULL) {
1190 pr_err("Problems finding threads of monitor\n");
1191 usage_with_options(stat_usage, options);
1192 }
1193
1194 if (system_wide)
1195 evsel_list->cpus = cpu_map__new(cpu_list);
1196 else
1197 evsel_list->cpus = cpu_map__dummy_new();
1198
1199 if (evsel_list->cpus == NULL) {
1200 perror("failed to parse CPUs map");
1201 usage_with_options(stat_usage, options);
1202 return -1;
1203 }
1204
1205 list_for_each_entry(pos, &evsel_list->entries, node) {
1206 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1207 perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 ||
1208 perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0)
1209 goto out_free_fd;
1210 }
1211
1212 /*
1213 * We dont want to block the signals - that would cause
1214 * child tasks to inherit that and Ctrl-C would not work.
1215 * What we want is for Ctrl-C to work in the exec()-ed
1216 * task, but being ignored by perf stat itself:
1217 */
1218 atexit(sig_atexit);
1219 signal(SIGINT, skip_signal);
1220 signal(SIGALRM, skip_signal);
1221 signal(SIGABRT, skip_signal);
1222
1223 status = 0;
1224 for (run_idx = 0; run_idx < run_count; run_idx++) {
1225 if (run_count != 1 && verbose)
1226 fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1);
1227
1228 if (sync_run)
1229 sync();
1230
1231 status = run_perf_stat(argc, argv);
1232 }
1233
1234 if (status != -1)
1235 print_stat(argc, argv);
1236 out_free_fd:
1237 list_for_each_entry(pos, &evsel_list->entries, node)
1238 perf_evsel__free_stat_priv(pos);
1239 perf_evlist__delete_maps(evsel_list);
1240 out:
1241 perf_evlist__delete(evsel_list);
1242 return status;
1243 }
x86 "subsystem" repository