xref: /openbmc/linux/tools/perf/ui/hist.c (revision a8fe58ce) 
1 #include <math.h>
2 #include <linux/compiler.h>
3 
4 #include "../util/hist.h"
5 #include "../util/util.h"
6 #include "../util/sort.h"
7 #include "../util/evsel.h"
8 
9 /* hist period print (hpp) functions */
10 
11 #define hpp__call_print_fn(hpp, fn, fmt, ...)			\
12 ({								\
13 	int __ret = fn(hpp, fmt, ##__VA_ARGS__);		\
14 	advance_hpp(hpp, __ret);				\
15 	__ret;							\
16 })
17 
18 static int __hpp__fmt(struct perf_hpp *hpp, struct hist_entry *he,
19 		      hpp_field_fn get_field, const char *fmt, int len,
20 		      hpp_snprint_fn print_fn, bool fmt_percent)
21 {
22 	int ret;
23 	struct hists *hists = he->hists;
24 	struct perf_evsel *evsel = hists_to_evsel(hists);
25 	char *buf = hpp->buf;
26 	size_t size = hpp->size;
27 
28 	if (fmt_percent) {
29 		double percent = 0.0;
30 		u64 total = hists__total_period(hists);
31 
32 		if (total)
33 			percent = 100.0 * get_field(he) / total;
34 
35 		ret = hpp__call_print_fn(hpp, print_fn, fmt, len, percent);
36 	} else
37 		ret = hpp__call_print_fn(hpp, print_fn, fmt, len, get_field(he));
38 
39 	if (perf_evsel__is_group_event(evsel)) {
40 		int prev_idx, idx_delta;
41 		struct hist_entry *pair;
42 		int nr_members = evsel->nr_members;
43 
44 		prev_idx = perf_evsel__group_idx(evsel);
45 
46 		list_for_each_entry(pair, &he->pairs.head, pairs.node) {
47 			u64 period = get_field(pair);
48 			u64 total = hists__total_period(pair->hists);
49 
50 			if (!total)
51 				continue;
52 
53 			evsel = hists_to_evsel(pair->hists);
54 			idx_delta = perf_evsel__group_idx(evsel) - prev_idx - 1;
55 
56 			while (idx_delta--) {
57 				/*
58 				 * zero-fill group members in the middle which
59 				 * have no sample
60 				 */
61 				if (fmt_percent) {
62 					ret += hpp__call_print_fn(hpp, print_fn,
63 								  fmt, len, 0.0);
64 				} else {
65 					ret += hpp__call_print_fn(hpp, print_fn,
66 								  fmt, len, 0ULL);
67 				}
68 			}
69 
70 			if (fmt_percent) {
71 				ret += hpp__call_print_fn(hpp, print_fn, fmt, len,
72 							  100.0 * period / total);
73 			} else {
74 				ret += hpp__call_print_fn(hpp, print_fn, fmt,
75 							  len, period);
76 			}
77 
78 			prev_idx = perf_evsel__group_idx(evsel);
79 		}
80 
81 		idx_delta = nr_members - prev_idx - 1;
82 
83 		while (idx_delta--) {
84 			/*
85 			 * zero-fill group members at last which have no sample
86 			 */
87 			if (fmt_percent) {
88 				ret += hpp__call_print_fn(hpp, print_fn,
89 							  fmt, len, 0.0);
90 			} else {
91 				ret += hpp__call_print_fn(hpp, print_fn,
92 							  fmt, len, 0ULL);
93 			}
94 		}
95 	}
96 
97 	/*
98 	 * Restore original buf and size as it's where caller expects
99 	 * the result will be saved.
100 	 */
101 	hpp->buf = buf;
102 	hpp->size = size;
103 
104 	return ret;
105 }
106 
107 int hpp__fmt(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
108 	     struct hist_entry *he, hpp_field_fn get_field,
109 	     const char *fmtstr, hpp_snprint_fn print_fn, bool fmt_percent)
110 {
111 	int len = fmt->user_len ?: fmt->len;
112 
113 	if (symbol_conf.field_sep) {
114 		return __hpp__fmt(hpp, he, get_field, fmtstr, 1,
115 				  print_fn, fmt_percent);
116 	}
117 
118 	if (fmt_percent)
119 		len -= 2; /* 2 for a space and a % sign */
120 	else
121 		len -= 1;
122 
123 	return  __hpp__fmt(hpp, he, get_field, fmtstr, len, print_fn, fmt_percent);
124 }
125 
126 int hpp__fmt_acc(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
127 		 struct hist_entry *he, hpp_field_fn get_field,
128 		 const char *fmtstr, hpp_snprint_fn print_fn, bool fmt_percent)
129 {
130 	if (!symbol_conf.cumulate_callchain) {
131 		int len = fmt->user_len ?: fmt->len;
132 		return snprintf(hpp->buf, hpp->size, " %*s", len - 1, "N/A");
133 	}
134 
135 	return hpp__fmt(fmt, hpp, he, get_field, fmtstr, print_fn, fmt_percent);
136 }
137 
138 static int field_cmp(u64 field_a, u64 field_b)
139 {
140 	if (field_a > field_b)
141 		return 1;
142 	if (field_a < field_b)
143 		return -1;
144 	return 0;
145 }
146 
147 static int __hpp__sort(struct hist_entry *a, struct hist_entry *b,
148 		       hpp_field_fn get_field)
149 {
150 	s64 ret;
151 	int i, nr_members;
152 	struct perf_evsel *evsel;
153 	struct hist_entry *pair;
154 	u64 *fields_a, *fields_b;
155 
156 	ret = field_cmp(get_field(a), get_field(b));
157 	if (ret || !symbol_conf.event_group)
158 		return ret;
159 
160 	evsel = hists_to_evsel(a->hists);
161 	if (!perf_evsel__is_group_event(evsel))
162 		return ret;
163 
164 	nr_members = evsel->nr_members;
165 	fields_a = calloc(nr_members, sizeof(*fields_a));
166 	fields_b = calloc(nr_members, sizeof(*fields_b));
167 
168 	if (!fields_a || !fields_b)
169 		goto out;
170 
171 	list_for_each_entry(pair, &a->pairs.head, pairs.node) {
172 		evsel = hists_to_evsel(pair->hists);
173 		fields_a[perf_evsel__group_idx(evsel)] = get_field(pair);
174 	}
175 
176 	list_for_each_entry(pair, &b->pairs.head, pairs.node) {
177 		evsel = hists_to_evsel(pair->hists);
178 		fields_b[perf_evsel__group_idx(evsel)] = get_field(pair);
179 	}
180 
181 	for (i = 1; i < nr_members; i++) {
182 		ret = field_cmp(fields_a[i], fields_b[i]);
183 		if (ret)
184 			break;
185 	}
186 
187 out:
188 	free(fields_a);
189 	free(fields_b);
190 
191 	return ret;
192 }
193 
194 static int __hpp__sort_acc(struct hist_entry *a, struct hist_entry *b,
195 			   hpp_field_fn get_field)
196 {
197 	s64 ret = 0;
198 
199 	if (symbol_conf.cumulate_callchain) {
200 		/*
201 		 * Put caller above callee when they have equal period.
202 		 */
203 		ret = field_cmp(get_field(a), get_field(b));
204 		if (ret)
205 			return ret;
206 
207 		if (a->thread != b->thread || !symbol_conf.use_callchain)
208 			return 0;
209 
210 		ret = b->callchain->max_depth - a->callchain->max_depth;
211 	}
212 	return ret;
213 }
214 
215 static int hpp__width_fn(struct perf_hpp_fmt *fmt,
216 			 struct perf_hpp *hpp __maybe_unused,
217 			 struct perf_evsel *evsel)
218 {
219 	int len = fmt->user_len ?: fmt->len;
220 
221 	if (symbol_conf.event_group)
222 		len = max(len, evsel->nr_members * fmt->len);
223 
224 	if (len < (int)strlen(fmt->name))
225 		len = strlen(fmt->name);
226 
227 	return len;
228 }
229 
230 static int hpp__header_fn(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
231 			  struct perf_evsel *evsel)
232 {
233 	int len = hpp__width_fn(fmt, hpp, evsel);
234 	return scnprintf(hpp->buf, hpp->size, "%*s", len, fmt->name);
235 }
236 
237 static int hpp_color_scnprintf(struct perf_hpp *hpp, const char *fmt, ...)
238 {
239 	va_list args;
240 	ssize_t ssize = hpp->size;
241 	double percent;
242 	int ret, len;
243 
244 	va_start(args, fmt);
245 	len = va_arg(args, int);
246 	percent = va_arg(args, double);
247 	ret = percent_color_len_snprintf(hpp->buf, hpp->size, fmt, len, percent);
248 	va_end(args);
249 
250 	return (ret >= ssize) ? (ssize - 1) : ret;
251 }
252 
253 static int hpp_entry_scnprintf(struct perf_hpp *hpp, const char *fmt, ...)
254 {
255 	va_list args;
256 	ssize_t ssize = hpp->size;
257 	int ret;
258 
259 	va_start(args, fmt);
260 	ret = vsnprintf(hpp->buf, hpp->size, fmt, args);
261 	va_end(args);
262 
263 	return (ret >= ssize) ? (ssize - 1) : ret;
264 }
265 
266 #define __HPP_COLOR_PERCENT_FN(_type, _field)					\
267 static u64 he_get_##_field(struct hist_entry *he)				\
268 {										\
269 	return he->stat._field;							\
270 }										\
271 										\
272 static int hpp__color_##_type(struct perf_hpp_fmt *fmt,				\
273 			      struct perf_hpp *hpp, struct hist_entry *he) 	\
274 {										\
275 	return hpp__fmt(fmt, hpp, he, he_get_##_field, " %*.2f%%",		\
276 			hpp_color_scnprintf, true);				\
277 }
278 
279 #define __HPP_ENTRY_PERCENT_FN(_type, _field)					\
280 static int hpp__entry_##_type(struct perf_hpp_fmt *fmt,				\
281 			      struct perf_hpp *hpp, struct hist_entry *he) 	\
282 {										\
283 	return hpp__fmt(fmt, hpp, he, he_get_##_field, " %*.2f%%",		\
284 			hpp_entry_scnprintf, true);				\
285 }
286 
287 #define __HPP_SORT_FN(_type, _field)						\
288 static int64_t hpp__sort_##_type(struct perf_hpp_fmt *fmt __maybe_unused, 	\
289 				 struct hist_entry *a, struct hist_entry *b) 	\
290 {										\
291 	return __hpp__sort(a, b, he_get_##_field);				\
292 }
293 
294 #define __HPP_COLOR_ACC_PERCENT_FN(_type, _field)				\
295 static u64 he_get_acc_##_field(struct hist_entry *he)				\
296 {										\
297 	return he->stat_acc->_field;						\
298 }										\
299 										\
300 static int hpp__color_##_type(struct perf_hpp_fmt *fmt,				\
301 			      struct perf_hpp *hpp, struct hist_entry *he) 	\
302 {										\
303 	return hpp__fmt_acc(fmt, hpp, he, he_get_acc_##_field, " %*.2f%%", 	\
304 			    hpp_color_scnprintf, true);				\
305 }
306 
307 #define __HPP_ENTRY_ACC_PERCENT_FN(_type, _field)				\
308 static int hpp__entry_##_type(struct perf_hpp_fmt *fmt,				\
309 			      struct perf_hpp *hpp, struct hist_entry *he) 	\
310 {										\
311 	return hpp__fmt_acc(fmt, hpp, he, he_get_acc_##_field, " %*.2f%%",	\
312 			    hpp_entry_scnprintf, true);				\
313 }
314 
315 #define __HPP_SORT_ACC_FN(_type, _field)					\
316 static int64_t hpp__sort_##_type(struct perf_hpp_fmt *fmt __maybe_unused, 	\
317 				 struct hist_entry *a, struct hist_entry *b) 	\
318 {										\
319 	return __hpp__sort_acc(a, b, he_get_acc_##_field);			\
320 }
321 
322 #define __HPP_ENTRY_RAW_FN(_type, _field)					\
323 static u64 he_get_raw_##_field(struct hist_entry *he)				\
324 {										\
325 	return he->stat._field;							\
326 }										\
327 										\
328 static int hpp__entry_##_type(struct perf_hpp_fmt *fmt,				\
329 			      struct perf_hpp *hpp, struct hist_entry *he) 	\
330 {										\
331 	return hpp__fmt(fmt, hpp, he, he_get_raw_##_field, " %*"PRIu64, 	\
332 			hpp_entry_scnprintf, false);				\
333 }
334 
335 #define __HPP_SORT_RAW_FN(_type, _field)					\
336 static int64_t hpp__sort_##_type(struct perf_hpp_fmt *fmt __maybe_unused, 	\
337 				 struct hist_entry *a, struct hist_entry *b) 	\
338 {										\
339 	return __hpp__sort(a, b, he_get_raw_##_field);				\
340 }
341 
342 
343 #define HPP_PERCENT_FNS(_type, _field)					\
344 __HPP_COLOR_PERCENT_FN(_type, _field)					\
345 __HPP_ENTRY_PERCENT_FN(_type, _field)					\
346 __HPP_SORT_FN(_type, _field)
347 
348 #define HPP_PERCENT_ACC_FNS(_type, _field)				\
349 __HPP_COLOR_ACC_PERCENT_FN(_type, _field)				\
350 __HPP_ENTRY_ACC_PERCENT_FN(_type, _field)				\
351 __HPP_SORT_ACC_FN(_type, _field)
352 
353 #define HPP_RAW_FNS(_type, _field)					\
354 __HPP_ENTRY_RAW_FN(_type, _field)					\
355 __HPP_SORT_RAW_FN(_type, _field)
356 
357 HPP_PERCENT_FNS(overhead, period)
358 HPP_PERCENT_FNS(overhead_sys, period_sys)
359 HPP_PERCENT_FNS(overhead_us, period_us)
360 HPP_PERCENT_FNS(overhead_guest_sys, period_guest_sys)
361 HPP_PERCENT_FNS(overhead_guest_us, period_guest_us)
362 HPP_PERCENT_ACC_FNS(overhead_acc, period)
363 
364 HPP_RAW_FNS(samples, nr_events)
365 HPP_RAW_FNS(period, period)
366 
367 static int64_t hpp__nop_cmp(struct perf_hpp_fmt *fmt __maybe_unused,
368 			    struct hist_entry *a __maybe_unused,
369 			    struct hist_entry *b __maybe_unused)
370 {
371 	return 0;
372 }
373 
374 #define HPP__COLOR_PRINT_FNS(_name, _fn)		\
375 	{						\
376 		.name   = _name,			\
377 		.header	= hpp__header_fn,		\
378 		.width	= hpp__width_fn,		\
379 		.color	= hpp__color_ ## _fn,		\
380 		.entry	= hpp__entry_ ## _fn,		\
381 		.cmp	= hpp__nop_cmp,			\
382 		.collapse = hpp__nop_cmp,		\
383 		.sort	= hpp__sort_ ## _fn,		\
384 	}
385 
386 #define HPP__COLOR_ACC_PRINT_FNS(_name, _fn)		\
387 	{						\
388 		.name   = _name,			\
389 		.header	= hpp__header_fn,		\
390 		.width	= hpp__width_fn,		\
391 		.color	= hpp__color_ ## _fn,		\
392 		.entry	= hpp__entry_ ## _fn,		\
393 		.cmp	= hpp__nop_cmp,			\
394 		.collapse = hpp__nop_cmp,		\
395 		.sort	= hpp__sort_ ## _fn,		\
396 	}
397 
398 #define HPP__PRINT_FNS(_name, _fn)			\
399 	{						\
400 		.name   = _name,			\
401 		.header	= hpp__header_fn,		\
402 		.width	= hpp__width_fn,		\
403 		.entry	= hpp__entry_ ## _fn,		\
404 		.cmp	= hpp__nop_cmp,			\
405 		.collapse = hpp__nop_cmp,		\
406 		.sort	= hpp__sort_ ## _fn,		\
407 	}
408 
409 struct perf_hpp_fmt perf_hpp__format[] = {
410 	HPP__COLOR_PRINT_FNS("Overhead", overhead),
411 	HPP__COLOR_PRINT_FNS("sys", overhead_sys),
412 	HPP__COLOR_PRINT_FNS("usr", overhead_us),
413 	HPP__COLOR_PRINT_FNS("guest sys", overhead_guest_sys),
414 	HPP__COLOR_PRINT_FNS("guest usr", overhead_guest_us),
415 	HPP__COLOR_ACC_PRINT_FNS("Children", overhead_acc),
416 	HPP__PRINT_FNS("Samples", samples),
417 	HPP__PRINT_FNS("Period", period)
418 };
419 
420 LIST_HEAD(perf_hpp__list);
421 LIST_HEAD(perf_hpp__sort_list);
422 
423 
424 #undef HPP__COLOR_PRINT_FNS
425 #undef HPP__COLOR_ACC_PRINT_FNS
426 #undef HPP__PRINT_FNS
427 
428 #undef HPP_PERCENT_FNS
429 #undef HPP_PERCENT_ACC_FNS
430 #undef HPP_RAW_FNS
431 
432 #undef __HPP_HEADER_FN
433 #undef __HPP_WIDTH_FN
434 #undef __HPP_COLOR_PERCENT_FN
435 #undef __HPP_ENTRY_PERCENT_FN
436 #undef __HPP_COLOR_ACC_PERCENT_FN
437 #undef __HPP_ENTRY_ACC_PERCENT_FN
438 #undef __HPP_ENTRY_RAW_FN
439 #undef __HPP_SORT_FN
440 #undef __HPP_SORT_ACC_FN
441 #undef __HPP_SORT_RAW_FN
442 
443 
444 void perf_hpp__init(void)
445 {
446 	int i;
447 
448 	for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
449 		struct perf_hpp_fmt *fmt = &perf_hpp__format[i];
450 
451 		INIT_LIST_HEAD(&fmt->list);
452 
453 		/* sort_list may be linked by setup_sorting() */
454 		if (fmt->sort_list.next == NULL)
455 			INIT_LIST_HEAD(&fmt->sort_list);
456 	}
457 
458 	/*
459 	 * If user specified field order, no need to setup default fields.
460 	 */
461 	if (is_strict_order(field_order))
462 		return;
463 
464 	if (symbol_conf.cumulate_callchain) {
465 		hpp_dimension__add_output(PERF_HPP__OVERHEAD_ACC);
466 		perf_hpp__format[PERF_HPP__OVERHEAD].name = "Self";
467 	}
468 
469 	hpp_dimension__add_output(PERF_HPP__OVERHEAD);
470 
471 	if (symbol_conf.show_cpu_utilization) {
472 		hpp_dimension__add_output(PERF_HPP__OVERHEAD_SYS);
473 		hpp_dimension__add_output(PERF_HPP__OVERHEAD_US);
474 
475 		if (perf_guest) {
476 			hpp_dimension__add_output(PERF_HPP__OVERHEAD_GUEST_SYS);
477 			hpp_dimension__add_output(PERF_HPP__OVERHEAD_GUEST_US);
478 		}
479 	}
480 
481 	if (symbol_conf.show_nr_samples)
482 		hpp_dimension__add_output(PERF_HPP__SAMPLES);
483 
484 	if (symbol_conf.show_total_period)
485 		hpp_dimension__add_output(PERF_HPP__PERIOD);
486 }
487 
488 void perf_hpp__column_register(struct perf_hpp_fmt *format)
489 {
490 	list_add_tail(&format->list, &perf_hpp__list);
491 }
492 
493 void perf_hpp__column_unregister(struct perf_hpp_fmt *format)
494 {
495 	list_del(&format->list);
496 }
497 
498 void perf_hpp__register_sort_field(struct perf_hpp_fmt *format)
499 {
500 	list_add_tail(&format->sort_list, &perf_hpp__sort_list);
501 }
502 
503 void perf_hpp__column_enable(unsigned col)
504 {
505 	BUG_ON(col >= PERF_HPP__MAX_INDEX);
506 	perf_hpp__column_register(&perf_hpp__format[col]);
507 }
508 
509 void perf_hpp__column_disable(unsigned col)
510 {
511 	BUG_ON(col >= PERF_HPP__MAX_INDEX);
512 	perf_hpp__column_unregister(&perf_hpp__format[col]);
513 }
514 
515 void perf_hpp__cancel_cumulate(void)
516 {
517 	if (is_strict_order(field_order))
518 		return;
519 
520 	perf_hpp__column_disable(PERF_HPP__OVERHEAD_ACC);
521 	perf_hpp__format[PERF_HPP__OVERHEAD].name = "Overhead";
522 }
523 
524 void perf_hpp__setup_output_field(void)
525 {
526 	struct perf_hpp_fmt *fmt;
527 
528 	/* append sort keys to output field */
529 	perf_hpp__for_each_sort_list(fmt) {
530 		if (!list_empty(&fmt->list))
531 			continue;
532 
533 		/*
534 		 * sort entry fields are dynamically created,
535 		 * so they can share a same sort key even though
536 		 * the list is empty.
537 		 */
538 		if (perf_hpp__is_sort_entry(fmt)) {
539 			struct perf_hpp_fmt *pos;
540 
541 			perf_hpp__for_each_format(pos) {
542 				if (perf_hpp__same_sort_entry(pos, fmt))
543 					goto next;
544 			}
545 		}
546 
547 		perf_hpp__column_register(fmt);
548 next:
549 		continue;
550 	}
551 }
552 
553 void perf_hpp__append_sort_keys(void)
554 {
555 	struct perf_hpp_fmt *fmt;
556 
557 	/* append output fields to sort keys */
558 	perf_hpp__for_each_format(fmt) {
559 		if (!list_empty(&fmt->sort_list))
560 			continue;
561 
562 		/*
563 		 * sort entry fields are dynamically created,
564 		 * so they can share a same sort key even though
565 		 * the list is empty.
566 		 */
567 		if (perf_hpp__is_sort_entry(fmt)) {
568 			struct perf_hpp_fmt *pos;
569 
570 			perf_hpp__for_each_sort_list(pos) {
571 				if (perf_hpp__same_sort_entry(pos, fmt))
572 					goto next;
573 			}
574 		}
575 
576 		perf_hpp__register_sort_field(fmt);
577 next:
578 		continue;
579 	}
580 }
581 
582 void perf_hpp__reset_output_field(void)
583 {
584 	struct perf_hpp_fmt *fmt, *tmp;
585 
586 	/* reset output fields */
587 	perf_hpp__for_each_format_safe(fmt, tmp) {
588 		list_del_init(&fmt->list);
589 		list_del_init(&fmt->sort_list);
590 	}
591 
592 	/* reset sort keys */
593 	perf_hpp__for_each_sort_list_safe(fmt, tmp) {
594 		list_del_init(&fmt->list);
595 		list_del_init(&fmt->sort_list);
596 	}
597 }
598 
599 /*
600  * See hists__fprintf to match the column widths
601  */
602 unsigned int hists__sort_list_width(struct hists *hists)
603 {
604 	struct perf_hpp_fmt *fmt;
605 	int ret = 0;
606 	bool first = true;
607 	struct perf_hpp dummy_hpp;
608 
609 	perf_hpp__for_each_format(fmt) {
610 		if (perf_hpp__should_skip(fmt, hists))
611 			continue;
612 
613 		if (first)
614 			first = false;
615 		else
616 			ret += 2;
617 
618 		ret += fmt->width(fmt, &dummy_hpp, hists_to_evsel(hists));
619 	}
620 
621 	if (verbose && sort__has_sym) /* Addr + origin */
622 		ret += 3 + BITS_PER_LONG / 4;
623 
624 	return ret;
625 }
626 
627 void perf_hpp__reset_width(struct perf_hpp_fmt *fmt, struct hists *hists)
628 {
629 	int idx;
630 
631 	if (perf_hpp__is_sort_entry(fmt))
632 		return perf_hpp__reset_sort_width(fmt, hists);
633 
634 	for (idx = 0; idx < PERF_HPP__MAX_INDEX; idx++) {
635 		if (fmt == &perf_hpp__format[idx])
636 			break;
637 	}
638 
639 	if (idx == PERF_HPP__MAX_INDEX)
640 		return;
641 
642 	switch (idx) {
643 	case PERF_HPP__OVERHEAD:
644 	case PERF_HPP__OVERHEAD_SYS:
645 	case PERF_HPP__OVERHEAD_US:
646 	case PERF_HPP__OVERHEAD_ACC:
647 		fmt->len = 8;
648 		break;
649 
650 	case PERF_HPP__OVERHEAD_GUEST_SYS:
651 	case PERF_HPP__OVERHEAD_GUEST_US:
652 		fmt->len = 9;
653 		break;
654 
655 	case PERF_HPP__SAMPLES:
656 	case PERF_HPP__PERIOD:
657 		fmt->len = 12;
658 		break;
659 
660 	default:
661 		break;
662 	}
663 }
664 
665 void perf_hpp__set_user_width(const char *width_list_str)
666 {
667 	struct perf_hpp_fmt *fmt;
668 	const char *ptr = width_list_str;
669 
670 	perf_hpp__for_each_format(fmt) {
671 		char *p;
672 
673 		int len = strtol(ptr, &p, 10);
674 		fmt->user_len = len;
675 
676 		if (*p == ',')
677 			ptr = p + 1;
678 		else
679 			break;
680 	}
681 }
682