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perf tools: Make stat/record print fatal signals of the target program
[GitHub/mt8127/android_kernel_alcatel_ttab.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/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 static bool group = false;
197 static const char *output_name = NULL;
198 static FILE *output = NULL;
199 static int output_fd;
200
201 static volatile int done = 0;
202
203 struct stats
204 {
205 double n, mean, M2;
206 };
207
208 struct perf_stat {
209 struct stats res_stats[3];
210 };
211
212 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
213 {
214 evsel->priv = zalloc(sizeof(struct perf_stat));
215 return evsel->priv == NULL ? -ENOMEM : 0;
216 }
217
218 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
219 {
220 free(evsel->priv);
221 evsel->priv = NULL;
222 }
223
224 static void update_stats(struct stats *stats, u64 val)
225 {
226 double delta;
227
228 stats->n++;
229 delta = val - stats->mean;
230 stats->mean += delta / stats->n;
231 stats->M2 += delta*(val - stats->mean);
232 }
233
234 static double avg_stats(struct stats *stats)
235 {
236 return stats->mean;
237 }
238
239 /*
240 * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
241 *
242 * (\Sum n_i^2) - ((\Sum n_i)^2)/n
243 * s^2 = -------------------------------
244 * n - 1
245 *
246 * http://en.wikipedia.org/wiki/Stddev
247 *
248 * The std dev of the mean is related to the std dev by:
249 *
250 * s
251 * s_mean = -------
252 * sqrt(n)
253 *
254 */
255 static double stddev_stats(struct stats *stats)
256 {
257 double variance, variance_mean;
258
259 if (!stats->n)
260 return 0.0;
261
262 variance = stats->M2 / (stats->n - 1);
263 variance_mean = variance / stats->n;
264
265 return sqrt(variance_mean);
266 }
267
268 struct stats runtime_nsecs_stats[MAX_NR_CPUS];
269 struct stats runtime_cycles_stats[MAX_NR_CPUS];
270 struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
271 struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
272 struct stats runtime_branches_stats[MAX_NR_CPUS];
273 struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
274 struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
275 struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
276 struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
277 struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
278 struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
279 struct stats walltime_nsecs_stats;
280
281 static int create_perf_stat_counter(struct perf_evsel *evsel)
282 {
283 struct perf_event_attr *attr = &evsel->attr;
284
285 if (scale)
286 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
287 PERF_FORMAT_TOTAL_TIME_RUNNING;
288
289 attr->inherit = !no_inherit;
290
291 if (system_wide)
292 return perf_evsel__open_per_cpu(evsel, evsel_list->cpus, group);
293
294 if (target_pid == -1 && target_tid == -1) {
295 attr->disabled = 1;
296 attr->enable_on_exec = 1;
297 }
298
299 return perf_evsel__open_per_thread(evsel, evsel_list->threads, group);
300 }
301
302 /*
303 * Does the counter have nsecs as a unit?
304 */
305 static inline int nsec_counter(struct perf_evsel *evsel)
306 {
307 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
308 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
309 return 1;
310
311 return 0;
312 }
313
314 /*
315 * Update various tracking values we maintain to print
316 * more semantic information such as miss/hit ratios,
317 * instruction rates, etc:
318 */
319 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
320 {
321 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
322 update_stats(&runtime_nsecs_stats[0], count[0]);
323 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
324 update_stats(&runtime_cycles_stats[0], count[0]);
325 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
326 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
327 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
328 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
329 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
330 update_stats(&runtime_branches_stats[0], count[0]);
331 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
332 update_stats(&runtime_cacherefs_stats[0], count[0]);
333 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
334 update_stats(&runtime_l1_dcache_stats[0], count[0]);
335 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
336 update_stats(&runtime_l1_icache_stats[0], count[0]);
337 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
338 update_stats(&runtime_ll_cache_stats[0], count[0]);
339 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
340 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
341 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
342 update_stats(&runtime_itlb_cache_stats[0], count[0]);
343 }
344
345 /*
346 * Read out the results of a single counter:
347 * aggregate counts across CPUs in system-wide mode
348 */
349 static int read_counter_aggr(struct perf_evsel *counter)
350 {
351 struct perf_stat *ps = counter->priv;
352 u64 *count = counter->counts->aggr.values;
353 int i;
354
355 if (__perf_evsel__read(counter, evsel_list->cpus->nr,
356 evsel_list->threads->nr, scale) < 0)
357 return -1;
358
359 for (i = 0; i < 3; i++)
360 update_stats(&ps->res_stats[i], count[i]);
361
362 if (verbose) {
363 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
364 event_name(counter), count[0], count[1], count[2]);
365 }
366
367 /*
368 * Save the full runtime - to allow normalization during printout:
369 */
370 update_shadow_stats(counter, count);
371
372 return 0;
373 }
374
375 /*
376 * Read out the results of a single counter:
377 * do not aggregate counts across CPUs in system-wide mode
378 */
379 static int read_counter(struct perf_evsel *counter)
380 {
381 u64 *count;
382 int cpu;
383
384 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
385 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
386 return -1;
387
388 count = counter->counts->cpu[cpu].values;
389
390 update_shadow_stats(counter, count);
391 }
392
393 return 0;
394 }
395
396 static int run_perf_stat(int argc __used, const char **argv)
397 {
398 unsigned long long t0, t1;
399 struct perf_evsel *counter;
400 int status = 0;
401 int child_ready_pipe[2], go_pipe[2];
402 const bool forks = (argc > 0);
403 char buf;
404
405 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
406 perror("failed to create pipes");
407 exit(1);
408 }
409
410 if (forks) {
411 if ((child_pid = fork()) < 0)
412 perror("failed to fork");
413
414 if (!child_pid) {
415 close(child_ready_pipe[0]);
416 close(go_pipe[1]);
417 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
418
419 /*
420 * Do a dummy execvp to get the PLT entry resolved,
421 * so we avoid the resolver overhead on the real
422 * execvp call.
423 */
424 execvp("", (char **)argv);
425
426 /*
427 * Tell the parent we're ready to go
428 */
429 close(child_ready_pipe[1]);
430
431 /*
432 * Wait until the parent tells us to go.
433 */
434 if (read(go_pipe[0], &buf, 1) == -1)
435 perror("unable to read pipe");
436
437 execvp(argv[0], (char **)argv);
438
439 perror(argv[0]);
440 exit(-1);
441 }
442
443 if (target_tid == -1 && target_pid == -1 && !system_wide)
444 evsel_list->threads->map[0] = child_pid;
445
446 /*
447 * Wait for the child to be ready to exec.
448 */
449 close(child_ready_pipe[1]);
450 close(go_pipe[0]);
451 if (read(child_ready_pipe[0], &buf, 1) == -1)
452 perror("unable to read pipe");
453 close(child_ready_pipe[0]);
454 }
455
456 list_for_each_entry(counter, &evsel_list->entries, node) {
457 if (create_perf_stat_counter(counter) < 0) {
458 if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) {
459 if (verbose)
460 ui__warning("%s event is not supported by the kernel.\n",
461 event_name(counter));
462 counter->supported = false;
463 continue;
464 }
465
466 if (errno == EPERM || errno == EACCES) {
467 error("You may not have permission to collect %sstats.\n"
468 "\t Consider tweaking"
469 " /proc/sys/kernel/perf_event_paranoid or running as root.",
470 system_wide ? "system-wide " : "");
471 } else {
472 error("open_counter returned with %d (%s). "
473 "/bin/dmesg may provide additional information.\n",
474 errno, strerror(errno));
475 }
476 if (child_pid != -1)
477 kill(child_pid, SIGTERM);
478 die("Not all events could be opened.\n");
479 return -1;
480 }
481 counter->supported = true;
482 }
483
484 if (perf_evlist__set_filters(evsel_list)) {
485 error("failed to set filter with %d (%s)\n", errno,
486 strerror(errno));
487 return -1;
488 }
489
490 /*
491 * Enable counters and exec the command:
492 */
493 t0 = rdclock();
494
495 if (forks) {
496 close(go_pipe[1]);
497 wait(&status);
498 if (WIFSIGNALED(status))
499 psignal(WTERMSIG(status), argv[0]);
500 } else {
501 while(!done) sleep(1);
502 }
503
504 t1 = rdclock();
505
506 update_stats(&walltime_nsecs_stats, t1 - t0);
507
508 if (no_aggr) {
509 list_for_each_entry(counter, &evsel_list->entries, node) {
510 read_counter(counter);
511 perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
512 }
513 } else {
514 list_for_each_entry(counter, &evsel_list->entries, node) {
515 read_counter_aggr(counter);
516 perf_evsel__close_fd(counter, evsel_list->cpus->nr,
517 evsel_list->threads->nr);
518 }
519 }
520
521 return WEXITSTATUS(status);
522 }
523
524 static void print_noise_pct(double total, double avg)
525 {
526 double pct = 0.0;
527
528 if (avg)
529 pct = 100.0*total/avg;
530
531 if (csv_output)
532 fprintf(output, "%s%.2f%%", csv_sep, pct);
533 else if (pct)
534 fprintf(output, " ( +-%6.2f%% )", pct);
535 }
536
537 static void print_noise(struct perf_evsel *evsel, double avg)
538 {
539 struct perf_stat *ps;
540
541 if (run_count == 1)
542 return;
543
544 ps = evsel->priv;
545 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
546 }
547
548 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
549 {
550 double msecs = avg / 1e6;
551 char cpustr[16] = { '\0', };
552 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
553
554 if (no_aggr)
555 sprintf(cpustr, "CPU%*d%s",
556 csv_output ? 0 : -4,
557 evsel_list->cpus->map[cpu], csv_sep);
558
559 fprintf(output, fmt, cpustr, msecs, csv_sep, event_name(evsel));
560
561 if (evsel->cgrp)
562 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
563
564 if (csv_output)
565 return;
566
567 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
568 fprintf(output, " # %8.3f CPUs utilized ",
569 avg / avg_stats(&walltime_nsecs_stats));
570 }
571
572 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
573 {
574 double total, ratio = 0.0;
575 const char *color;
576
577 total = avg_stats(&runtime_cycles_stats[cpu]);
578
579 if (total)
580 ratio = avg / total * 100.0;
581
582 color = PERF_COLOR_NORMAL;
583 if (ratio > 50.0)
584 color = PERF_COLOR_RED;
585 else if (ratio > 30.0)
586 color = PERF_COLOR_MAGENTA;
587 else if (ratio > 10.0)
588 color = PERF_COLOR_YELLOW;
589
590 fprintf(output, " # ");
591 color_fprintf(output, color, "%6.2f%%", ratio);
592 fprintf(output, " frontend cycles idle ");
593 }
594
595 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
596 {
597 double total, ratio = 0.0;
598 const char *color;
599
600 total = avg_stats(&runtime_cycles_stats[cpu]);
601
602 if (total)
603 ratio = avg / total * 100.0;
604
605 color = PERF_COLOR_NORMAL;
606 if (ratio > 75.0)
607 color = PERF_COLOR_RED;
608 else if (ratio > 50.0)
609 color = PERF_COLOR_MAGENTA;
610 else if (ratio > 20.0)
611 color = PERF_COLOR_YELLOW;
612
613 fprintf(output, " # ");
614 color_fprintf(output, color, "%6.2f%%", ratio);
615 fprintf(output, " backend cycles idle ");
616 }
617
618 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
619 {
620 double total, ratio = 0.0;
621 const char *color;
622
623 total = avg_stats(&runtime_branches_stats[cpu]);
624
625 if (total)
626 ratio = avg / total * 100.0;
627
628 color = PERF_COLOR_NORMAL;
629 if (ratio > 20.0)
630 color = PERF_COLOR_RED;
631 else if (ratio > 10.0)
632 color = PERF_COLOR_MAGENTA;
633 else if (ratio > 5.0)
634 color = PERF_COLOR_YELLOW;
635
636 fprintf(output, " # ");
637 color_fprintf(output, color, "%6.2f%%", ratio);
638 fprintf(output, " of all branches ");
639 }
640
641 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
642 {
643 double total, ratio = 0.0;
644 const char *color;
645
646 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
647
648 if (total)
649 ratio = avg / total * 100.0;
650
651 color = PERF_COLOR_NORMAL;
652 if (ratio > 20.0)
653 color = PERF_COLOR_RED;
654 else if (ratio > 10.0)
655 color = PERF_COLOR_MAGENTA;
656 else if (ratio > 5.0)
657 color = PERF_COLOR_YELLOW;
658
659 fprintf(output, " # ");
660 color_fprintf(output, color, "%6.2f%%", ratio);
661 fprintf(output, " of all L1-dcache hits ");
662 }
663
664 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
665 {
666 double total, ratio = 0.0;
667 const char *color;
668
669 total = avg_stats(&runtime_l1_icache_stats[cpu]);
670
671 if (total)
672 ratio = avg / total * 100.0;
673
674 color = PERF_COLOR_NORMAL;
675 if (ratio > 20.0)
676 color = PERF_COLOR_RED;
677 else if (ratio > 10.0)
678 color = PERF_COLOR_MAGENTA;
679 else if (ratio > 5.0)
680 color = PERF_COLOR_YELLOW;
681
682 fprintf(output, " # ");
683 color_fprintf(output, color, "%6.2f%%", ratio);
684 fprintf(output, " of all L1-icache hits ");
685 }
686
687 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
688 {
689 double total, ratio = 0.0;
690 const char *color;
691
692 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
693
694 if (total)
695 ratio = avg / total * 100.0;
696
697 color = PERF_COLOR_NORMAL;
698 if (ratio > 20.0)
699 color = PERF_COLOR_RED;
700 else if (ratio > 10.0)
701 color = PERF_COLOR_MAGENTA;
702 else if (ratio > 5.0)
703 color = PERF_COLOR_YELLOW;
704
705 fprintf(output, " # ");
706 color_fprintf(output, color, "%6.2f%%", ratio);
707 fprintf(output, " of all dTLB cache hits ");
708 }
709
710 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
711 {
712 double total, ratio = 0.0;
713 const char *color;
714
715 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
716
717 if (total)
718 ratio = avg / total * 100.0;
719
720 color = PERF_COLOR_NORMAL;
721 if (ratio > 20.0)
722 color = PERF_COLOR_RED;
723 else if (ratio > 10.0)
724 color = PERF_COLOR_MAGENTA;
725 else if (ratio > 5.0)
726 color = PERF_COLOR_YELLOW;
727
728 fprintf(output, " # ");
729 color_fprintf(output, color, "%6.2f%%", ratio);
730 fprintf(output, " of all iTLB cache hits ");
731 }
732
733 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
734 {
735 double total, ratio = 0.0;
736 const char *color;
737
738 total = avg_stats(&runtime_ll_cache_stats[cpu]);
739
740 if (total)
741 ratio = avg / total * 100.0;
742
743 color = PERF_COLOR_NORMAL;
744 if (ratio > 20.0)
745 color = PERF_COLOR_RED;
746 else if (ratio > 10.0)
747 color = PERF_COLOR_MAGENTA;
748 else if (ratio > 5.0)
749 color = PERF_COLOR_YELLOW;
750
751 fprintf(output, " # ");
752 color_fprintf(output, color, "%6.2f%%", ratio);
753 fprintf(output, " of all LL-cache hits ");
754 }
755
756 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
757 {
758 double total, ratio = 0.0;
759 char cpustr[16] = { '\0', };
760 const char *fmt;
761
762 if (csv_output)
763 fmt = "%s%.0f%s%s";
764 else if (big_num)
765 fmt = "%s%'18.0f%s%-25s";
766 else
767 fmt = "%s%18.0f%s%-25s";
768
769 if (no_aggr)
770 sprintf(cpustr, "CPU%*d%s",
771 csv_output ? 0 : -4,
772 evsel_list->cpus->map[cpu], csv_sep);
773 else
774 cpu = 0;
775
776 fprintf(output, fmt, cpustr, avg, csv_sep, event_name(evsel));
777
778 if (evsel->cgrp)
779 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
780
781 if (csv_output)
782 return;
783
784 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
785 total = avg_stats(&runtime_cycles_stats[cpu]);
786
787 if (total)
788 ratio = avg / total;
789
790 fprintf(output, " # %5.2f insns per cycle ", ratio);
791
792 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
793 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
794
795 if (total && avg) {
796 ratio = total / avg;
797 fprintf(output, "\n # %5.2f stalled cycles per insn", ratio);
798 }
799
800 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
801 runtime_branches_stats[cpu].n != 0) {
802 print_branch_misses(cpu, evsel, avg);
803 } else if (
804 evsel->attr.type == PERF_TYPE_HW_CACHE &&
805 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
806 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
807 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
808 runtime_l1_dcache_stats[cpu].n != 0) {
809 print_l1_dcache_misses(cpu, evsel, avg);
810 } else if (
811 evsel->attr.type == PERF_TYPE_HW_CACHE &&
812 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
813 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
814 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
815 runtime_l1_icache_stats[cpu].n != 0) {
816 print_l1_icache_misses(cpu, evsel, avg);
817 } else if (
818 evsel->attr.type == PERF_TYPE_HW_CACHE &&
819 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
820 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
821 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
822 runtime_dtlb_cache_stats[cpu].n != 0) {
823 print_dtlb_cache_misses(cpu, evsel, avg);
824 } else if (
825 evsel->attr.type == PERF_TYPE_HW_CACHE &&
826 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
827 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
828 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
829 runtime_itlb_cache_stats[cpu].n != 0) {
830 print_itlb_cache_misses(cpu, evsel, avg);
831 } else if (
832 evsel->attr.type == PERF_TYPE_HW_CACHE &&
833 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
834 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
835 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
836 runtime_ll_cache_stats[cpu].n != 0) {
837 print_ll_cache_misses(cpu, evsel, avg);
838 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
839 runtime_cacherefs_stats[cpu].n != 0) {
840 total = avg_stats(&runtime_cacherefs_stats[cpu]);
841
842 if (total)
843 ratio = avg * 100 / total;
844
845 fprintf(output, " # %8.3f %% of all cache refs ", ratio);
846
847 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
848 print_stalled_cycles_frontend(cpu, evsel, avg);
849 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
850 print_stalled_cycles_backend(cpu, evsel, avg);
851 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
852 total = avg_stats(&runtime_nsecs_stats[cpu]);
853
854 if (total)
855 ratio = 1.0 * avg / total;
856
857 fprintf(output, " # %8.3f GHz ", ratio);
858 } else if (runtime_nsecs_stats[cpu].n != 0) {
859 total = avg_stats(&runtime_nsecs_stats[cpu]);
860
861 if (total)
862 ratio = 1000.0 * avg / total;
863
864 fprintf(output, " # %8.3f M/sec ", ratio);
865 } else {
866 fprintf(output, " ");
867 }
868 }
869
870 /*
871 * Print out the results of a single counter:
872 * aggregated counts in system-wide mode
873 */
874 static void print_counter_aggr(struct perf_evsel *counter)
875 {
876 struct perf_stat *ps = counter->priv;
877 double avg = avg_stats(&ps->res_stats[0]);
878 int scaled = counter->counts->scaled;
879
880 if (scaled == -1) {
881 fprintf(output, "%*s%s%*s",
882 csv_output ? 0 : 18,
883 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
884 csv_sep,
885 csv_output ? 0 : -24,
886 event_name(counter));
887
888 if (counter->cgrp)
889 fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
890
891 fputc('\n', output);
892 return;
893 }
894
895 if (nsec_counter(counter))
896 nsec_printout(-1, counter, avg);
897 else
898 abs_printout(-1, counter, avg);
899
900 print_noise(counter, avg);
901
902 if (csv_output) {
903 fputc('\n', output);
904 return;
905 }
906
907 if (scaled) {
908 double avg_enabled, avg_running;
909
910 avg_enabled = avg_stats(&ps->res_stats[1]);
911 avg_running = avg_stats(&ps->res_stats[2]);
912
913 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
914 }
915 fprintf(output, "\n");
916 }
917
918 /*
919 * Print out the results of a single counter:
920 * does not use aggregated count in system-wide
921 */
922 static void print_counter(struct perf_evsel *counter)
923 {
924 u64 ena, run, val;
925 int cpu;
926
927 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
928 val = counter->counts->cpu[cpu].val;
929 ena = counter->counts->cpu[cpu].ena;
930 run = counter->counts->cpu[cpu].run;
931 if (run == 0 || ena == 0) {
932 fprintf(output, "CPU%*d%s%*s%s%*s",
933 csv_output ? 0 : -4,
934 evsel_list->cpus->map[cpu], csv_sep,
935 csv_output ? 0 : 18,
936 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
937 csv_sep,
938 csv_output ? 0 : -24,
939 event_name(counter));
940
941 if (counter->cgrp)
942 fprintf(output, "%s%s",
943 csv_sep, counter->cgrp->name);
944
945 fputc('\n', output);
946 continue;
947 }
948
949 if (nsec_counter(counter))
950 nsec_printout(cpu, counter, val);
951 else
952 abs_printout(cpu, counter, val);
953
954 if (!csv_output) {
955 print_noise(counter, 1.0);
956
957 if (run != ena)
958 fprintf(output, " (%.2f%%)",
959 100.0 * run / ena);
960 }
961 fputc('\n', output);
962 }
963 }
964
965 static void print_stat(int argc, const char **argv)
966 {
967 struct perf_evsel *counter;
968 int i;
969
970 fflush(stdout);
971
972 if (!csv_output) {
973 fprintf(output, "\n");
974 fprintf(output, " Performance counter stats for ");
975 if(target_pid == -1 && target_tid == -1) {
976 fprintf(output, "\'%s", argv[0]);
977 for (i = 1; i < argc; i++)
978 fprintf(output, " %s", argv[i]);
979 } else if (target_pid != -1)
980 fprintf(output, "process id \'%d", target_pid);
981 else
982 fprintf(output, "thread id \'%d", target_tid);
983
984 fprintf(output, "\'");
985 if (run_count > 1)
986 fprintf(output, " (%d runs)", run_count);
987 fprintf(output, ":\n\n");
988 }
989
990 if (no_aggr) {
991 list_for_each_entry(counter, &evsel_list->entries, node)
992 print_counter(counter);
993 } else {
994 list_for_each_entry(counter, &evsel_list->entries, node)
995 print_counter_aggr(counter);
996 }
997
998 if (!csv_output) {
999 if (!null_run)
1000 fprintf(output, "\n");
1001 fprintf(output, " %17.9f seconds time elapsed",
1002 avg_stats(&walltime_nsecs_stats)/1e9);
1003 if (run_count > 1) {
1004 fprintf(output, " ");
1005 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1006 avg_stats(&walltime_nsecs_stats));
1007 }
1008 fprintf(output, "\n\n");
1009 }
1010 }
1011
1012 static volatile int signr = -1;
1013
1014 static void skip_signal(int signo)
1015 {
1016 if(child_pid == -1)
1017 done = 1;
1018
1019 signr = signo;
1020 }
1021
1022 static void sig_atexit(void)
1023 {
1024 if (child_pid != -1)
1025 kill(child_pid, SIGTERM);
1026
1027 if (signr == -1)
1028 return;
1029
1030 signal(signr, SIG_DFL);
1031 kill(getpid(), signr);
1032 }
1033
1034 static const char * const stat_usage[] = {
1035 "perf stat [<options>] [<command>]",
1036 NULL
1037 };
1038
1039 static int stat__set_big_num(const struct option *opt __used,
1040 const char *s __used, int unset)
1041 {
1042 big_num_opt = unset ? 0 : 1;
1043 return 0;
1044 }
1045
1046 static bool append_file;
1047
1048 static const struct option options[] = {
1049 OPT_CALLBACK('e', "event", &evsel_list, "event",
1050 "event selector. use 'perf list' to list available events",
1051 parse_events_option),
1052 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1053 "event filter", parse_filter),
1054 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1055 "child tasks do not inherit counters"),
1056 OPT_INTEGER('p', "pid", &target_pid,
1057 "stat events on existing process id"),
1058 OPT_INTEGER('t', "tid", &target_tid,
1059 "stat events on existing thread id"),
1060 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1061 "system-wide collection from all CPUs"),
1062 OPT_BOOLEAN('g', "group", &group,
1063 "put the counters into a counter group"),
1064 OPT_BOOLEAN('c', "scale", &scale,
1065 "scale/normalize counters"),
1066 OPT_INCR('v', "verbose", &verbose,
1067 "be more verbose (show counter open errors, etc)"),
1068 OPT_INTEGER('r', "repeat", &run_count,
1069 "repeat command and print average + stddev (max: 100)"),
1070 OPT_BOOLEAN('n', "null", &null_run,
1071 "null run - dont start any counters"),
1072 OPT_INCR('d', "detailed", &detailed_run,
1073 "detailed run - start a lot of events"),
1074 OPT_BOOLEAN('S', "sync", &sync_run,
1075 "call sync() before starting a run"),
1076 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1077 "print large numbers with thousands\' separators",
1078 stat__set_big_num),
1079 OPT_STRING('C', "cpu", &cpu_list, "cpu",
1080 "list of cpus to monitor in system-wide"),
1081 OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1082 "disable CPU count aggregation"),
1083 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1084 "print counts with custom separator"),
1085 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1086 "monitor event in cgroup name only",
1087 parse_cgroups),
1088 OPT_STRING('o', "output", &output_name, "file",
1089 "output file name"),
1090 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1091 OPT_INTEGER(0, "log-fd", &output_fd,
1092 "log output to fd, instead of stderr"),
1093 OPT_END()
1094 };
1095
1096 /*
1097 * Add default attributes, if there were no attributes specified or
1098 * if -d/--detailed, -d -d or -d -d -d is used:
1099 */
1100 static int add_default_attributes(void)
1101 {
1102 struct perf_evsel *pos;
1103 size_t attr_nr = 0;
1104 size_t c;
1105
1106 /* Set attrs if no event is selected and !null_run: */
1107 if (null_run)
1108 return 0;
1109
1110 if (!evsel_list->nr_entries) {
1111 for (c = 0; c < ARRAY_SIZE(default_attrs); c++) {
1112 pos = perf_evsel__new(default_attrs + c, c + attr_nr);
1113 if (pos == NULL)
1114 return -1;
1115 perf_evlist__add(evsel_list, pos);
1116 }
1117 attr_nr += c;
1118 }
1119
1120 /* Detailed events get appended to the event list: */
1121
1122 if (detailed_run < 1)
1123 return 0;
1124
1125 /* Append detailed run extra attributes: */
1126 for (c = 0; c < ARRAY_SIZE(detailed_attrs); c++) {
1127 pos = perf_evsel__new(detailed_attrs + c, c + attr_nr);
1128 if (pos == NULL)
1129 return -1;
1130 perf_evlist__add(evsel_list, pos);
1131 }
1132 attr_nr += c;
1133
1134 if (detailed_run < 2)
1135 return 0;
1136
1137 /* Append very detailed run extra attributes: */
1138 for (c = 0; c < ARRAY_SIZE(very_detailed_attrs); c++) {
1139 pos = perf_evsel__new(very_detailed_attrs + c, c + attr_nr);
1140 if (pos == NULL)
1141 return -1;
1142 perf_evlist__add(evsel_list, pos);
1143 }
1144
1145 if (detailed_run < 3)
1146 return 0;
1147
1148 /* Append very, very detailed run extra attributes: */
1149 for (c = 0; c < ARRAY_SIZE(very_very_detailed_attrs); c++) {
1150 pos = perf_evsel__new(very_very_detailed_attrs + c, c + attr_nr);
1151 if (pos == NULL)
1152 return -1;
1153 perf_evlist__add(evsel_list, pos);
1154 }
1155
1156
1157 return 0;
1158 }
1159
1160 int cmd_stat(int argc, const char **argv, const char *prefix __used)
1161 {
1162 struct perf_evsel *pos;
1163 int status = -ENOMEM;
1164 const char *mode;
1165
1166 setlocale(LC_ALL, "");
1167
1168 evsel_list = perf_evlist__new(NULL, NULL);
1169 if (evsel_list == NULL)
1170 return -ENOMEM;
1171
1172 argc = parse_options(argc, argv, options, stat_usage,
1173 PARSE_OPT_STOP_AT_NON_OPTION);
1174
1175 output = stderr;
1176 if (output_name && strcmp(output_name, "-"))
1177 output = NULL;
1178
1179 if (output_name && output_fd) {
1180 fprintf(stderr, "cannot use both --output and --log-fd\n");
1181 usage_with_options(stat_usage, options);
1182 }
1183 if (!output) {
1184 struct timespec tm;
1185 mode = append_file ? "a" : "w";
1186
1187 output = fopen(output_name, mode);
1188 if (!output) {
1189 perror("failed to create output file");
1190 exit(-1);
1191 }
1192 clock_gettime(CLOCK_REALTIME, &tm);
1193 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1194 } else if (output_fd != 2) {
1195 mode = append_file ? "a" : "w";
1196 output = fdopen(output_fd, mode);
1197 if (!output) {
1198 perror("Failed opening logfd");
1199 return -errno;
1200 }
1201 }
1202
1203 if (csv_sep) {
1204 csv_output = true;
1205 if (!strcmp(csv_sep, "\\t"))
1206 csv_sep = "\t";
1207 } else
1208 csv_sep = DEFAULT_SEPARATOR;
1209
1210 /*
1211 * let the spreadsheet do the pretty-printing
1212 */
1213 if (csv_output) {
1214 /* User explicitly passed -B? */
1215 if (big_num_opt == 1) {
1216 fprintf(stderr, "-B option not supported with -x\n");
1217 usage_with_options(stat_usage, options);
1218 } else /* Nope, so disable big number formatting */
1219 big_num = false;
1220 } else if (big_num_opt == 0) /* User passed --no-big-num */
1221 big_num = false;
1222
1223 if (!argc && target_pid == -1 && target_tid == -1)
1224 usage_with_options(stat_usage, options);
1225 if (run_count <= 0)
1226 usage_with_options(stat_usage, options);
1227
1228 /* no_aggr, cgroup are for system-wide only */
1229 if ((no_aggr || nr_cgroups) && !system_wide) {
1230 fprintf(stderr, "both cgroup and no-aggregation "
1231 "modes only available in system-wide mode\n");
1232
1233 usage_with_options(stat_usage, options);
1234 }
1235
1236 if (add_default_attributes())
1237 goto out;
1238
1239 if (target_pid != -1)
1240 target_tid = target_pid;
1241
1242 evsel_list->threads = thread_map__new(target_pid, target_tid);
1243 if (evsel_list->threads == NULL) {
1244 pr_err("Problems finding threads of monitor\n");
1245 usage_with_options(stat_usage, options);
1246 }
1247
1248 if (system_wide)
1249 evsel_list->cpus = cpu_map__new(cpu_list);
1250 else
1251 evsel_list->cpus = cpu_map__dummy_new();
1252
1253 if (evsel_list->cpus == NULL) {
1254 perror("failed to parse CPUs map");
1255 usage_with_options(stat_usage, options);
1256 return -1;
1257 }
1258
1259 list_for_each_entry(pos, &evsel_list->entries, node) {
1260 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1261 perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 ||
1262 perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0)
1263 goto out_free_fd;
1264 }
1265
1266 /*
1267 * We dont want to block the signals - that would cause
1268 * child tasks to inherit that and Ctrl-C would not work.
1269 * What we want is for Ctrl-C to work in the exec()-ed
1270 * task, but being ignored by perf stat itself:
1271 */
1272 atexit(sig_atexit);
1273 signal(SIGINT, skip_signal);
1274 signal(SIGALRM, skip_signal);
1275 signal(SIGABRT, skip_signal);
1276
1277 status = 0;
1278 for (run_idx = 0; run_idx < run_count; run_idx++) {
1279 if (run_count != 1 && verbose)
1280 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1281 run_idx + 1);
1282
1283 if (sync_run)
1284 sync();
1285
1286 status = run_perf_stat(argc, argv);
1287 }
1288
1289 if (status != -1)
1290 print_stat(argc, argv);
1291 out_free_fd:
1292 list_for_each_entry(pos, &evsel_list->entries, node)
1293 perf_evsel__free_stat_priv(pos);
1294 perf_evlist__delete_maps(evsel_list);
1295 out:
1296 perf_evlist__delete(evsel_list);
1297 return status;
1298 }
kernel source for telekom puls (alcatel/mediatek)