1
2#include <stdio.h>
3#include <linux/string.h>
4
5#include "../../util/util.h"
6#include "../../util/hist.h"
7#include "../../util/sort.h"
8#include "../../util/evsel.h"
9#include "../../util/srcline.h"
10#include "../../util/string2.h"
11#include "../../util/thread.h"
12#include "../../util/sane_ctype.h"
13
14static size_t callchain__fprintf_left_margin(FILE *fp, int left_margin)
15{
16 int i;
17 int ret = fprintf(fp, " ");
18
19 for (i = 0; i < left_margin; i++)
20 ret += fprintf(fp, " ");
21
22 return ret;
23}
24
25static size_t ipchain__fprintf_graph_line(FILE *fp, int depth, int depth_mask,
26 int left_margin)
27{
28 int i;
29 size_t ret = callchain__fprintf_left_margin(fp, left_margin);
30
31 for (i = 0; i < depth; i++)
32 if (depth_mask & (1 << i))
33 ret += fprintf(fp, "| ");
34 else
35 ret += fprintf(fp, " ");
36
37 ret += fprintf(fp, "\n");
38
39 return ret;
40}
41
42static size_t ipchain__fprintf_graph(FILE *fp, struct callchain_node *node,
43 struct callchain_list *chain,
44 int depth, int depth_mask, int period,
45 u64 total_samples, int left_margin)
46{
47 int i;
48 size_t ret = 0;
49 char bf[1024], *alloc_str = NULL;
50 char buf[64];
51 const char *str;
52
53 ret += callchain__fprintf_left_margin(fp, left_margin);
54 for (i = 0; i < depth; i++) {
55 if (depth_mask & (1 << i))
56 ret += fprintf(fp, "|");
57 else
58 ret += fprintf(fp, " ");
59 if (!period && i == depth - 1) {
60 ret += fprintf(fp, "--");
61 ret += callchain_node__fprintf_value(node, fp, total_samples);
62 ret += fprintf(fp, "--");
63 } else
64 ret += fprintf(fp, "%s", " ");
65 }
66
67 str = callchain_list__sym_name(chain, bf, sizeof(bf), false);
68
69 if (symbol_conf.show_branchflag_count) {
70 callchain_list_counts__printf_value(chain, NULL,
71 buf, sizeof(buf));
72
73 if (asprintf(&alloc_str, "%s%s", str, buf) < 0)
74 str = "Not enough memory!";
75 else
76 str = alloc_str;
77 }
78
79 fputs(str, fp);
80 fputc('\n', fp);
81 free(alloc_str);
82
83 return ret;
84}
85
86static struct symbol *rem_sq_bracket;
87static struct callchain_list rem_hits;
88
89static void init_rem_hits(void)
90{
91 rem_sq_bracket = malloc(sizeof(*rem_sq_bracket) + 6);
92 if (!rem_sq_bracket) {
93 fprintf(stderr, "Not enough memory to display remaining hits\n");
94 return;
95 }
96
97 strcpy(rem_sq_bracket->name, "[...]");
98 rem_hits.ms.sym = rem_sq_bracket;
99}
100
101static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root,
102 u64 total_samples, int depth,
103 int depth_mask, int left_margin)
104{
105 struct rb_node *node, *next;
106 struct callchain_node *child = NULL;
107 struct callchain_list *chain;
108 int new_depth_mask = depth_mask;
109 u64 remaining;
110 size_t ret = 0;
111 int i;
112 uint entries_printed = 0;
113 int cumul_count = 0;
114
115 remaining = total_samples;
116
117 node = rb_first(root);
118 while (node) {
119 u64 new_total;
120 u64 cumul;
121
122 child = rb_entry(node, struct callchain_node, rb_node);
123 cumul = callchain_cumul_hits(child);
124 remaining -= cumul;
125 cumul_count += callchain_cumul_counts(child);
126
127
128
129
130
131
132
133
134 next = rb_next(node);
135 if (!next && (callchain_param.mode != CHAIN_GRAPH_REL || !remaining))
136 new_depth_mask &= ~(1 << (depth - 1));
137
138
139
140
141
142 ret += ipchain__fprintf_graph_line(fp, depth, depth_mask,
143 left_margin);
144 i = 0;
145 list_for_each_entry(chain, &child->val, list) {
146 ret += ipchain__fprintf_graph(fp, child, chain, depth,
147 new_depth_mask, i++,
148 total_samples,
149 left_margin);
150 }
151
152 if (callchain_param.mode == CHAIN_GRAPH_REL)
153 new_total = child->children_hit;
154 else
155 new_total = total_samples;
156
157 ret += __callchain__fprintf_graph(fp, &child->rb_root, new_total,
158 depth + 1,
159 new_depth_mask | (1 << depth),
160 left_margin);
161 node = next;
162 if (++entries_printed == callchain_param.print_limit)
163 break;
164 }
165
166 if (callchain_param.mode == CHAIN_GRAPH_REL &&
167 remaining && remaining != total_samples) {
168 struct callchain_node rem_node = {
169 .hit = remaining,
170 };
171
172 if (!rem_sq_bracket)
173 return ret;
174
175 if (callchain_param.value == CCVAL_COUNT && child && child->parent) {
176 rem_node.count = child->parent->children_count - cumul_count;
177 if (rem_node.count <= 0)
178 return ret;
179 }
180
181 new_depth_mask &= ~(1 << (depth - 1));
182 ret += ipchain__fprintf_graph(fp, &rem_node, &rem_hits, depth,
183 new_depth_mask, 0, total_samples,
184 left_margin);
185 }
186
187 return ret;
188}
189
190
191
192
193
194
195
196
197
198static bool need_percent_display(struct rb_node *node, u64 parent_samples)
199{
200 struct callchain_node *cnode;
201
202 if (rb_next(node))
203 return true;
204
205 cnode = rb_entry(node, struct callchain_node, rb_node);
206 return callchain_cumul_hits(cnode) != parent_samples;
207}
208
209static size_t callchain__fprintf_graph(FILE *fp, struct rb_root *root,
210 u64 total_samples, u64 parent_samples,
211 int left_margin)
212{
213 struct callchain_node *cnode;
214 struct callchain_list *chain;
215 u32 entries_printed = 0;
216 bool printed = false;
217 struct rb_node *node;
218 int i = 0;
219 int ret = 0;
220 char bf[1024];
221
222 node = rb_first(root);
223 if (node && !need_percent_display(node, parent_samples)) {
224 cnode = rb_entry(node, struct callchain_node, rb_node);
225 list_for_each_entry(chain, &cnode->val, list) {
226
227
228
229
230
231 if (!i++ && field_order == NULL &&
232 sort_order && strstarts(sort_order, "sym"))
233 continue;
234
235 if (!printed) {
236 ret += callchain__fprintf_left_margin(fp, left_margin);
237 ret += fprintf(fp, "|\n");
238 ret += callchain__fprintf_left_margin(fp, left_margin);
239 ret += fprintf(fp, "---");
240 left_margin += 3;
241 printed = true;
242 } else
243 ret += callchain__fprintf_left_margin(fp, left_margin);
244
245 ret += fprintf(fp, "%s",
246 callchain_list__sym_name(chain, bf,
247 sizeof(bf),
248 false));
249
250 if (symbol_conf.show_branchflag_count)
251 ret += callchain_list_counts__printf_value(
252 chain, fp, NULL, 0);
253 ret += fprintf(fp, "\n");
254
255 if (++entries_printed == callchain_param.print_limit)
256 break;
257 }
258 root = &cnode->rb_root;
259 }
260
261 if (callchain_param.mode == CHAIN_GRAPH_REL)
262 total_samples = parent_samples;
263
264 ret += __callchain__fprintf_graph(fp, root, total_samples,
265 1, 1, left_margin);
266 if (ret) {
267
268 ret += fprintf(fp, "\n");
269 }
270
271 return ret;
272}
273
274static size_t __callchain__fprintf_flat(FILE *fp, struct callchain_node *node,
275 u64 total_samples)
276{
277 struct callchain_list *chain;
278 size_t ret = 0;
279 char bf[1024];
280
281 if (!node)
282 return 0;
283
284 ret += __callchain__fprintf_flat(fp, node->parent, total_samples);
285
286
287 list_for_each_entry(chain, &node->val, list) {
288 if (chain->ip >= PERF_CONTEXT_MAX)
289 continue;
290 ret += fprintf(fp, " %s\n", callchain_list__sym_name(chain,
291 bf, sizeof(bf), false));
292 }
293
294 return ret;
295}
296
297static size_t callchain__fprintf_flat(FILE *fp, struct rb_root *tree,
298 u64 total_samples)
299{
300 size_t ret = 0;
301 u32 entries_printed = 0;
302 struct callchain_node *chain;
303 struct rb_node *rb_node = rb_first(tree);
304
305 while (rb_node) {
306 chain = rb_entry(rb_node, struct callchain_node, rb_node);
307
308 ret += fprintf(fp, " ");
309 ret += callchain_node__fprintf_value(chain, fp, total_samples);
310 ret += fprintf(fp, "\n");
311 ret += __callchain__fprintf_flat(fp, chain, total_samples);
312 ret += fprintf(fp, "\n");
313 if (++entries_printed == callchain_param.print_limit)
314 break;
315
316 rb_node = rb_next(rb_node);
317 }
318
319 return ret;
320}
321
322static size_t __callchain__fprintf_folded(FILE *fp, struct callchain_node *node)
323{
324 const char *sep = symbol_conf.field_sep ?: ";";
325 struct callchain_list *chain;
326 size_t ret = 0;
327 char bf[1024];
328 bool first;
329
330 if (!node)
331 return 0;
332
333 ret += __callchain__fprintf_folded(fp, node->parent);
334
335 first = (ret == 0);
336 list_for_each_entry(chain, &node->val, list) {
337 if (chain->ip >= PERF_CONTEXT_MAX)
338 continue;
339 ret += fprintf(fp, "%s%s", first ? "" : sep,
340 callchain_list__sym_name(chain,
341 bf, sizeof(bf), false));
342 first = false;
343 }
344
345 return ret;
346}
347
348static size_t callchain__fprintf_folded(FILE *fp, struct rb_root *tree,
349 u64 total_samples)
350{
351 size_t ret = 0;
352 u32 entries_printed = 0;
353 struct callchain_node *chain;
354 struct rb_node *rb_node = rb_first(tree);
355
356 while (rb_node) {
357
358 chain = rb_entry(rb_node, struct callchain_node, rb_node);
359
360 ret += callchain_node__fprintf_value(chain, fp, total_samples);
361 ret += fprintf(fp, " ");
362 ret += __callchain__fprintf_folded(fp, chain);
363 ret += fprintf(fp, "\n");
364 if (++entries_printed == callchain_param.print_limit)
365 break;
366
367 rb_node = rb_next(rb_node);
368 }
369
370 return ret;
371}
372
373static size_t hist_entry_callchain__fprintf(struct hist_entry *he,
374 u64 total_samples, int left_margin,
375 FILE *fp)
376{
377 u64 parent_samples = he->stat.period;
378
379 if (symbol_conf.cumulate_callchain)
380 parent_samples = he->stat_acc->period;
381
382 switch (callchain_param.mode) {
383 case CHAIN_GRAPH_REL:
384 return callchain__fprintf_graph(fp, &he->sorted_chain, total_samples,
385 parent_samples, left_margin);
386 break;
387 case CHAIN_GRAPH_ABS:
388 return callchain__fprintf_graph(fp, &he->sorted_chain, total_samples,
389 parent_samples, left_margin);
390 break;
391 case CHAIN_FLAT:
392 return callchain__fprintf_flat(fp, &he->sorted_chain, total_samples);
393 break;
394 case CHAIN_FOLDED:
395 return callchain__fprintf_folded(fp, &he->sorted_chain, total_samples);
396 break;
397 case CHAIN_NONE:
398 break;
399 default:
400 pr_err("Bad callchain mode\n");
401 }
402
403 return 0;
404}
405
406int __hist_entry__snprintf(struct hist_entry *he, struct perf_hpp *hpp,
407 struct perf_hpp_list *hpp_list)
408{
409 const char *sep = symbol_conf.field_sep;
410 struct perf_hpp_fmt *fmt;
411 char *start = hpp->buf;
412 int ret;
413 bool first = true;
414
415 if (symbol_conf.exclude_other && !he->parent)
416 return 0;
417
418 perf_hpp_list__for_each_format(hpp_list, fmt) {
419 if (perf_hpp__should_skip(fmt, he->hists))
420 continue;
421
422
423
424
425
426 if (!sep || !first) {
427 ret = scnprintf(hpp->buf, hpp->size, "%s", sep ?: " ");
428 advance_hpp(hpp, ret);
429 } else
430 first = false;
431
432 if (perf_hpp__use_color() && fmt->color)
433 ret = fmt->color(fmt, hpp, he);
434 else
435 ret = fmt->entry(fmt, hpp, he);
436
437 ret = hist_entry__snprintf_alignment(he, hpp, fmt, ret);
438 advance_hpp(hpp, ret);
439 }
440
441 return hpp->buf - start;
442}
443
444static int hist_entry__snprintf(struct hist_entry *he, struct perf_hpp *hpp)
445{
446 return __hist_entry__snprintf(he, hpp, he->hists->hpp_list);
447}
448
449static int hist_entry__hierarchy_fprintf(struct hist_entry *he,
450 struct perf_hpp *hpp,
451 struct hists *hists,
452 FILE *fp)
453{
454 const char *sep = symbol_conf.field_sep;
455 struct perf_hpp_fmt *fmt;
456 struct perf_hpp_list_node *fmt_node;
457 char *buf = hpp->buf;
458 size_t size = hpp->size;
459 int ret, printed = 0;
460 bool first = true;
461
462 if (symbol_conf.exclude_other && !he->parent)
463 return 0;
464
465 ret = scnprintf(hpp->buf, hpp->size, "%*s", he->depth * HIERARCHY_INDENT, "");
466 advance_hpp(hpp, ret);
467
468
469 fmt_node = list_first_entry(&hists->hpp_formats,
470 struct perf_hpp_list_node, list);
471 perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
472
473
474
475
476 if (!sep || !first) {
477 ret = scnprintf(hpp->buf, hpp->size, "%s", sep ?: " ");
478 advance_hpp(hpp, ret);
479 } else
480 first = false;
481
482 if (perf_hpp__use_color() && fmt->color)
483 ret = fmt->color(fmt, hpp, he);
484 else
485 ret = fmt->entry(fmt, hpp, he);
486
487 ret = hist_entry__snprintf_alignment(he, hpp, fmt, ret);
488 advance_hpp(hpp, ret);
489 }
490
491 if (!sep)
492 ret = scnprintf(hpp->buf, hpp->size, "%*s",
493 (hists->nr_hpp_node - 2) * HIERARCHY_INDENT, "");
494 advance_hpp(hpp, ret);
495
496 printed += fprintf(fp, "%s", buf);
497
498 perf_hpp_list__for_each_format(he->hpp_list, fmt) {
499 hpp->buf = buf;
500 hpp->size = size;
501
502
503
504
505
506 if (perf_hpp__use_color() && fmt->color)
507 fmt->color(fmt, hpp, he);
508 else
509 fmt->entry(fmt, hpp, he);
510
511
512
513
514
515 printed += fprintf(fp, "%s%s", sep ?: " ", ltrim(buf));
516 }
517 printed += putc('\n', fp);
518
519 if (he->leaf && hist_entry__has_callchains(he) && symbol_conf.use_callchain) {
520 u64 total = hists__total_period(hists);
521
522 printed += hist_entry_callchain__fprintf(he, total, 0, fp);
523 goto out;
524 }
525
526out:
527 return printed;
528}
529
530static int hist_entry__fprintf(struct hist_entry *he, size_t size,
531 char *bf, size_t bfsz, FILE *fp,
532 bool ignore_callchains)
533{
534 int ret;
535 int callchain_ret = 0;
536 struct perf_hpp hpp = {
537 .buf = bf,
538 .size = size,
539 };
540 struct hists *hists = he->hists;
541 u64 total_period = hists->stats.total_period;
542
543 if (size == 0 || size > bfsz)
544 size = hpp.size = bfsz;
545
546 if (symbol_conf.report_hierarchy)
547 return hist_entry__hierarchy_fprintf(he, &hpp, hists, fp);
548
549 hist_entry__snprintf(he, &hpp);
550
551 ret = fprintf(fp, "%s\n", bf);
552
553 if (hist_entry__has_callchains(he) && !ignore_callchains)
554 callchain_ret = hist_entry_callchain__fprintf(he, total_period,
555 0, fp);
556
557 ret += callchain_ret;
558
559 return ret;
560}
561
562static int print_hierarchy_indent(const char *sep, int indent,
563 const char *line, FILE *fp)
564{
565 if (sep != NULL || indent < 2)
566 return 0;
567
568 return fprintf(fp, "%-.*s", (indent - 2) * HIERARCHY_INDENT, line);
569}
570
571static int hists__fprintf_hierarchy_headers(struct hists *hists,
572 struct perf_hpp *hpp, FILE *fp)
573{
574 bool first_node, first_col;
575 int indent;
576 int depth;
577 unsigned width = 0;
578 unsigned header_width = 0;
579 struct perf_hpp_fmt *fmt;
580 struct perf_hpp_list_node *fmt_node;
581 const char *sep = symbol_conf.field_sep;
582
583 indent = hists->nr_hpp_node;
584
585
586 print_hierarchy_indent(sep, indent, spaces, fp);
587
588
589 fmt_node = list_first_entry(&hists->hpp_formats,
590 struct perf_hpp_list_node, list);
591
592 perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
593 fmt->header(fmt, hpp, hists, 0, NULL);
594 fprintf(fp, "%s%s", hpp->buf, sep ?: " ");
595 }
596
597
598 first_node = true;
599 list_for_each_entry_continue(fmt_node, &hists->hpp_formats, list) {
600 if (!first_node)
601 header_width += fprintf(fp, " / ");
602 first_node = false;
603
604 first_col = true;
605 perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
606 if (perf_hpp__should_skip(fmt, hists))
607 continue;
608
609 if (!first_col)
610 header_width += fprintf(fp, "+");
611 first_col = false;
612
613 fmt->header(fmt, hpp, hists, 0, NULL);
614
615 header_width += fprintf(fp, "%s", trim(hpp->buf));
616 }
617 }
618
619 fprintf(fp, "\n# ");
620
621
622 print_hierarchy_indent(sep, indent, dots, fp);
623
624
625 fmt_node = list_first_entry(&hists->hpp_formats,
626 struct perf_hpp_list_node, list);
627
628 first_col = true;
629 perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
630 if (!first_col)
631 fprintf(fp, "%s", sep ?: "..");
632 first_col = false;
633
634 width = fmt->width(fmt, hpp, hists);
635 fprintf(fp, "%.*s", width, dots);
636 }
637
638 depth = 0;
639 list_for_each_entry_continue(fmt_node, &hists->hpp_formats, list) {
640 first_col = true;
641 width = depth * HIERARCHY_INDENT;
642
643 perf_hpp_list__for_each_format(&fmt_node->hpp, fmt) {
644 if (perf_hpp__should_skip(fmt, hists))
645 continue;
646
647 if (!first_col)
648 width++;
649 first_col = false;
650
651 width += fmt->width(fmt, hpp, hists);
652 }
653
654 if (width > header_width)
655 header_width = width;
656
657 depth++;
658 }
659
660 fprintf(fp, "%s%-.*s", sep ?: " ", header_width, dots);
661
662 fprintf(fp, "\n#\n");
663
664 return 2;
665}
666
667static void fprintf_line(struct hists *hists, struct perf_hpp *hpp,
668 int line, FILE *fp)
669{
670 struct perf_hpp_fmt *fmt;
671 const char *sep = symbol_conf.field_sep;
672 bool first = true;
673 int span = 0;
674
675 hists__for_each_format(hists, fmt) {
676 if (perf_hpp__should_skip(fmt, hists))
677 continue;
678
679 if (!first && !span)
680 fprintf(fp, "%s", sep ?: " ");
681 else
682 first = false;
683
684 fmt->header(fmt, hpp, hists, line, &span);
685
686 if (!span)
687 fprintf(fp, "%s", hpp->buf);
688 }
689}
690
691static int
692hists__fprintf_standard_headers(struct hists *hists,
693 struct perf_hpp *hpp,
694 FILE *fp)
695{
696 struct perf_hpp_list *hpp_list = hists->hpp_list;
697 struct perf_hpp_fmt *fmt;
698 unsigned int width;
699 const char *sep = symbol_conf.field_sep;
700 bool first = true;
701 int line;
702
703 for (line = 0; line < hpp_list->nr_header_lines; line++) {
704
705 if (line)
706 fprintf(fp, "# ");
707 fprintf_line(hists, hpp, line, fp);
708 fprintf(fp, "\n");
709 }
710
711 if (sep)
712 return hpp_list->nr_header_lines;
713
714 first = true;
715
716 fprintf(fp, "# ");
717
718 hists__for_each_format(hists, fmt) {
719 unsigned int i;
720
721 if (perf_hpp__should_skip(fmt, hists))
722 continue;
723
724 if (!first)
725 fprintf(fp, "%s", sep ?: " ");
726 else
727 first = false;
728
729 width = fmt->width(fmt, hpp, hists);
730 for (i = 0; i < width; i++)
731 fprintf(fp, ".");
732 }
733
734 fprintf(fp, "\n");
735 fprintf(fp, "#\n");
736 return hpp_list->nr_header_lines + 2;
737}
738
739int hists__fprintf_headers(struct hists *hists, FILE *fp)
740{
741 char bf[1024];
742 struct perf_hpp dummy_hpp = {
743 .buf = bf,
744 .size = sizeof(bf),
745 };
746
747 fprintf(fp, "# ");
748
749 if (symbol_conf.report_hierarchy)
750 return hists__fprintf_hierarchy_headers(hists, &dummy_hpp, fp);
751 else
752 return hists__fprintf_standard_headers(hists, &dummy_hpp, fp);
753
754}
755
756size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
757 int max_cols, float min_pcnt, FILE *fp,
758 bool ignore_callchains)
759{
760 struct rb_node *nd;
761 size_t ret = 0;
762 const char *sep = symbol_conf.field_sep;
763 int nr_rows = 0;
764 size_t linesz;
765 char *line = NULL;
766 unsigned indent;
767
768 init_rem_hits();
769
770 hists__reset_column_width(hists);
771
772 if (symbol_conf.col_width_list_str)
773 perf_hpp__set_user_width(symbol_conf.col_width_list_str);
774
775 if (show_header)
776 nr_rows += hists__fprintf_headers(hists, fp);
777
778 if (max_rows && nr_rows >= max_rows)
779 goto out;
780
781 linesz = hists__sort_list_width(hists) + 3 + 1;
782 linesz += perf_hpp__color_overhead();
783 line = malloc(linesz);
784 if (line == NULL) {
785 ret = -1;
786 goto out;
787 }
788
789 indent = hists__overhead_width(hists) + 4;
790
791 for (nd = rb_first(&hists->entries); nd; nd = __rb_hierarchy_next(nd, HMD_FORCE_CHILD)) {
792 struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
793 float percent;
794
795 if (h->filtered)
796 continue;
797
798 percent = hist_entry__get_percent_limit(h);
799 if (percent < min_pcnt)
800 continue;
801
802 ret += hist_entry__fprintf(h, max_cols, line, linesz, fp, ignore_callchains);
803
804 if (max_rows && ++nr_rows >= max_rows)
805 break;
806
807
808
809
810
811 if (!h->leaf && !hist_entry__has_hierarchy_children(h, min_pcnt)) {
812 int depth = hists->nr_hpp_node + h->depth + 1;
813
814 print_hierarchy_indent(sep, depth, spaces, fp);
815 fprintf(fp, "%*sno entry >= %.2f%%\n", indent, "", min_pcnt);
816
817 if (max_rows && ++nr_rows >= max_rows)
818 break;
819 }
820
821 if (h->ms.map == NULL && verbose > 1) {
822 map_groups__fprintf(h->thread->mg, fp);
823 fprintf(fp, "%.10s end\n", graph_dotted_line);
824 }
825 }
826
827 free(line);
828out:
829 zfree(&rem_sq_bracket);
830
831 return ret;
832}
833
834size_t events_stats__fprintf(struct events_stats *stats, FILE *fp)
835{
836 int i;
837 size_t ret = 0;
838
839 for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
840 const char *name;
841
842 name = perf_event__name(i);
843 if (!strcmp(name, "UNKNOWN"))
844 continue;
845
846 ret += fprintf(fp, "%16s events: %10d\n", name, stats->nr_events[i]);
847 }
848
849 return ret;
850}
851
