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[mirror_ubuntu-bionic-kernel.git] / tools / perf / builtin-kmem.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include "builtin.h"
3 #include "perf.h"
4
5 #include "util/evlist.h"
6 #include "util/evsel.h"
7 #include "util/util.h"
8 #include "util/config.h"
9 #include "util/symbol.h"
10 #include "util/thread.h"
11 #include "util/header.h"
12 #include "util/session.h"
13 #include "util/tool.h"
14 #include "util/callchain.h"
15 #include "util/time-utils.h"
16
17 #include <subcmd/parse-options.h>
18 #include "util/trace-event.h"
19 #include "util/data.h"
20 #include "util/cpumap.h"
21
22 #include "util/debug.h"
23
24 #include <linux/kernel.h>
25 #include <linux/rbtree.h>
26 #include <linux/string.h>
27 #include <errno.h>
28 #include <inttypes.h>
29 #include <locale.h>
30 #include <regex.h>
31
32 #include "sane_ctype.h"
33
34 static int kmem_slab;
35 static int kmem_page;
36
37 static long kmem_page_size;
38 static enum {
39 KMEM_SLAB,
40 KMEM_PAGE,
41 } kmem_default = KMEM_SLAB; /* for backward compatibility */
42
43 struct alloc_stat;
44 typedef int (*sort_fn_t)(void *, void *);
45
46 static int alloc_flag;
47 static int caller_flag;
48
49 static int alloc_lines = -1;
50 static int caller_lines = -1;
51
52 static bool raw_ip;
53
54 struct alloc_stat {
55 u64 call_site;
56 u64 ptr;
57 u64 bytes_req;
58 u64 bytes_alloc;
59 u64 last_alloc;
60 u32 hit;
61 u32 pingpong;
62
63 short alloc_cpu;
64
65 struct rb_node node;
66 };
67
68 static struct rb_root root_alloc_stat;
69 static struct rb_root root_alloc_sorted;
70 static struct rb_root root_caller_stat;
71 static struct rb_root root_caller_sorted;
72
73 static unsigned long total_requested, total_allocated, total_freed;
74 static unsigned long nr_allocs, nr_cross_allocs;
75
76 /* filters for controlling start and stop of time of analysis */
77 static struct perf_time_interval ptime;
78 const char *time_str;
79
80 static int insert_alloc_stat(unsigned long call_site, unsigned long ptr,
81 int bytes_req, int bytes_alloc, int cpu)
82 {
83 struct rb_node **node = &root_alloc_stat.rb_node;
84 struct rb_node *parent = NULL;
85 struct alloc_stat *data = NULL;
86
87 while (*node) {
88 parent = *node;
89 data = rb_entry(*node, struct alloc_stat, node);
90
91 if (ptr > data->ptr)
92 node = &(*node)->rb_right;
93 else if (ptr < data->ptr)
94 node = &(*node)->rb_left;
95 else
96 break;
97 }
98
99 if (data && data->ptr == ptr) {
100 data->hit++;
101 data->bytes_req += bytes_req;
102 data->bytes_alloc += bytes_alloc;
103 } else {
104 data = malloc(sizeof(*data));
105 if (!data) {
106 pr_err("%s: malloc failed\n", __func__);
107 return -1;
108 }
109 data->ptr = ptr;
110 data->pingpong = 0;
111 data->hit = 1;
112 data->bytes_req = bytes_req;
113 data->bytes_alloc = bytes_alloc;
114
115 rb_link_node(&data->node, parent, node);
116 rb_insert_color(&data->node, &root_alloc_stat);
117 }
118 data->call_site = call_site;
119 data->alloc_cpu = cpu;
120 data->last_alloc = bytes_alloc;
121
122 return 0;
123 }
124
125 static int insert_caller_stat(unsigned long call_site,
126 int bytes_req, int bytes_alloc)
127 {
128 struct rb_node **node = &root_caller_stat.rb_node;
129 struct rb_node *parent = NULL;
130 struct alloc_stat *data = NULL;
131
132 while (*node) {
133 parent = *node;
134 data = rb_entry(*node, struct alloc_stat, node);
135
136 if (call_site > data->call_site)
137 node = &(*node)->rb_right;
138 else if (call_site < data->call_site)
139 node = &(*node)->rb_left;
140 else
141 break;
142 }
143
144 if (data && data->call_site == call_site) {
145 data->hit++;
146 data->bytes_req += bytes_req;
147 data->bytes_alloc += bytes_alloc;
148 } else {
149 data = malloc(sizeof(*data));
150 if (!data) {
151 pr_err("%s: malloc failed\n", __func__);
152 return -1;
153 }
154 data->call_site = call_site;
155 data->pingpong = 0;
156 data->hit = 1;
157 data->bytes_req = bytes_req;
158 data->bytes_alloc = bytes_alloc;
159
160 rb_link_node(&data->node, parent, node);
161 rb_insert_color(&data->node, &root_caller_stat);
162 }
163
164 return 0;
165 }
166
167 static int perf_evsel__process_alloc_event(struct perf_evsel *evsel,
168 struct perf_sample *sample)
169 {
170 unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr"),
171 call_site = perf_evsel__intval(evsel, sample, "call_site");
172 int bytes_req = perf_evsel__intval(evsel, sample, "bytes_req"),
173 bytes_alloc = perf_evsel__intval(evsel, sample, "bytes_alloc");
174
175 if (insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, sample->cpu) ||
176 insert_caller_stat(call_site, bytes_req, bytes_alloc))
177 return -1;
178
179 total_requested += bytes_req;
180 total_allocated += bytes_alloc;
181
182 nr_allocs++;
183 return 0;
184 }
185
186 static int perf_evsel__process_alloc_node_event(struct perf_evsel *evsel,
187 struct perf_sample *sample)
188 {
189 int ret = perf_evsel__process_alloc_event(evsel, sample);
190
191 if (!ret) {
192 int node1 = cpu__get_node(sample->cpu),
193 node2 = perf_evsel__intval(evsel, sample, "node");
194
195 if (node1 != node2)
196 nr_cross_allocs++;
197 }
198
199 return ret;
200 }
201
202 static int ptr_cmp(void *, void *);
203 static int slab_callsite_cmp(void *, void *);
204
205 static struct alloc_stat *search_alloc_stat(unsigned long ptr,
206 unsigned long call_site,
207 struct rb_root *root,
208 sort_fn_t sort_fn)
209 {
210 struct rb_node *node = root->rb_node;
211 struct alloc_stat key = { .ptr = ptr, .call_site = call_site };
212
213 while (node) {
214 struct alloc_stat *data;
215 int cmp;
216
217 data = rb_entry(node, struct alloc_stat, node);
218
219 cmp = sort_fn(&key, data);
220 if (cmp < 0)
221 node = node->rb_left;
222 else if (cmp > 0)
223 node = node->rb_right;
224 else
225 return data;
226 }
227 return NULL;
228 }
229
230 static int perf_evsel__process_free_event(struct perf_evsel *evsel,
231 struct perf_sample *sample)
232 {
233 unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr");
234 struct alloc_stat *s_alloc, *s_caller;
235
236 s_alloc = search_alloc_stat(ptr, 0, &root_alloc_stat, ptr_cmp);
237 if (!s_alloc)
238 return 0;
239
240 total_freed += s_alloc->last_alloc;
241
242 if ((short)sample->cpu != s_alloc->alloc_cpu) {
243 s_alloc->pingpong++;
244
245 s_caller = search_alloc_stat(0, s_alloc->call_site,
246 &root_caller_stat,
247 slab_callsite_cmp);
248 if (!s_caller)
249 return -1;
250 s_caller->pingpong++;
251 }
252 s_alloc->alloc_cpu = -1;
253
254 return 0;
255 }
256
257 static u64 total_page_alloc_bytes;
258 static u64 total_page_free_bytes;
259 static u64 total_page_nomatch_bytes;
260 static u64 total_page_fail_bytes;
261 static unsigned long nr_page_allocs;
262 static unsigned long nr_page_frees;
263 static unsigned long nr_page_fails;
264 static unsigned long nr_page_nomatch;
265
266 static bool use_pfn;
267 static bool live_page;
268 static struct perf_session *kmem_session;
269
270 #define MAX_MIGRATE_TYPES 6
271 #define MAX_PAGE_ORDER 11
272
273 static int order_stats[MAX_PAGE_ORDER][MAX_MIGRATE_TYPES];
274
275 struct page_stat {
276 struct rb_node node;
277 u64 page;
278 u64 callsite;
279 int order;
280 unsigned gfp_flags;
281 unsigned migrate_type;
282 u64 alloc_bytes;
283 u64 free_bytes;
284 int nr_alloc;
285 int nr_free;
286 };
287
288 static struct rb_root page_live_tree;
289 static struct rb_root page_alloc_tree;
290 static struct rb_root page_alloc_sorted;
291 static struct rb_root page_caller_tree;
292 static struct rb_root page_caller_sorted;
293
294 struct alloc_func {
295 u64 start;
296 u64 end;
297 char *name;
298 };
299
300 static int nr_alloc_funcs;
301 static struct alloc_func *alloc_func_list;
302
303 static int funcmp(const void *a, const void *b)
304 {
305 const struct alloc_func *fa = a;
306 const struct alloc_func *fb = b;
307
308 if (fa->start > fb->start)
309 return 1;
310 else
311 return -1;
312 }
313
314 static int callcmp(const void *a, const void *b)
315 {
316 const struct alloc_func *fa = a;
317 const struct alloc_func *fb = b;
318
319 if (fb->start <= fa->start && fa->end < fb->end)
320 return 0;
321
322 if (fa->start > fb->start)
323 return 1;
324 else
325 return -1;
326 }
327
328 static int build_alloc_func_list(void)
329 {
330 int ret;
331 struct map *kernel_map;
332 struct symbol *sym;
333 struct rb_node *node;
334 struct alloc_func *func;
335 struct machine *machine = &kmem_session->machines.host;
336 regex_t alloc_func_regex;
337 const char pattern[] = "^_?_?(alloc|get_free|get_zeroed)_pages?";
338
339 ret = regcomp(&alloc_func_regex, pattern, REG_EXTENDED);
340 if (ret) {
341 char err[BUFSIZ];
342
343 regerror(ret, &alloc_func_regex, err, sizeof(err));
344 pr_err("Invalid regex: %s\n%s", pattern, err);
345 return -EINVAL;
346 }
347
348 kernel_map = machine__kernel_map(machine);
349 if (map__load(kernel_map) < 0) {
350 pr_err("cannot load kernel map\n");
351 return -ENOENT;
352 }
353
354 map__for_each_symbol(kernel_map, sym, node) {
355 if (regexec(&alloc_func_regex, sym->name, 0, NULL, 0))
356 continue;
357
358 func = realloc(alloc_func_list,
359 (nr_alloc_funcs + 1) * sizeof(*func));
360 if (func == NULL)
361 return -ENOMEM;
362
363 pr_debug("alloc func: %s\n", sym->name);
364 func[nr_alloc_funcs].start = sym->start;
365 func[nr_alloc_funcs].end = sym->end;
366 func[nr_alloc_funcs].name = sym->name;
367
368 alloc_func_list = func;
369 nr_alloc_funcs++;
370 }
371
372 qsort(alloc_func_list, nr_alloc_funcs, sizeof(*func), funcmp);
373
374 regfree(&alloc_func_regex);
375 return 0;
376 }
377
378 /*
379 * Find first non-memory allocation function from callchain.
380 * The allocation functions are in the 'alloc_func_list'.
381 */
382 static u64 find_callsite(struct perf_evsel *evsel, struct perf_sample *sample)
383 {
384 struct addr_location al;
385 struct machine *machine = &kmem_session->machines.host;
386 struct callchain_cursor_node *node;
387
388 if (alloc_func_list == NULL) {
389 if (build_alloc_func_list() < 0)
390 goto out;
391 }
392
393 al.thread = machine__findnew_thread(machine, sample->pid, sample->tid);
394 sample__resolve_callchain(sample, &callchain_cursor, NULL, evsel, &al, 16);
395
396 callchain_cursor_commit(&callchain_cursor);
397 while (true) {
398 struct alloc_func key, *caller;
399 u64 addr;
400
401 node = callchain_cursor_current(&callchain_cursor);
402 if (node == NULL)
403 break;
404
405 key.start = key.end = node->ip;
406 caller = bsearch(&key, alloc_func_list, nr_alloc_funcs,
407 sizeof(key), callcmp);
408 if (!caller) {
409 /* found */
410 if (node->map)
411 addr = map__unmap_ip(node->map, node->ip);
412 else
413 addr = node->ip;
414
415 return addr;
416 } else
417 pr_debug3("skipping alloc function: %s\n", caller->name);
418
419 callchain_cursor_advance(&callchain_cursor);
420 }
421
422 out:
423 pr_debug2("unknown callsite: %"PRIx64 "\n", sample->ip);
424 return sample->ip;
425 }
426
427 struct sort_dimension {
428 const char name[20];
429 sort_fn_t cmp;
430 struct list_head list;
431 };
432
433 static LIST_HEAD(page_alloc_sort_input);
434 static LIST_HEAD(page_caller_sort_input);
435
436 static struct page_stat *
437 __page_stat__findnew_page(struct page_stat *pstat, bool create)
438 {
439 struct rb_node **node = &page_live_tree.rb_node;
440 struct rb_node *parent = NULL;
441 struct page_stat *data;
442
443 while (*node) {
444 s64 cmp;
445
446 parent = *node;
447 data = rb_entry(*node, struct page_stat, node);
448
449 cmp = data->page - pstat->page;
450 if (cmp < 0)
451 node = &parent->rb_left;
452 else if (cmp > 0)
453 node = &parent->rb_right;
454 else
455 return data;
456 }
457
458 if (!create)
459 return NULL;
460
461 data = zalloc(sizeof(*data));
462 if (data != NULL) {
463 data->page = pstat->page;
464 data->order = pstat->order;
465 data->gfp_flags = pstat->gfp_flags;
466 data->migrate_type = pstat->migrate_type;
467
468 rb_link_node(&data->node, parent, node);
469 rb_insert_color(&data->node, &page_live_tree);
470 }
471
472 return data;
473 }
474
475 static struct page_stat *page_stat__find_page(struct page_stat *pstat)
476 {
477 return __page_stat__findnew_page(pstat, false);
478 }
479
480 static struct page_stat *page_stat__findnew_page(struct page_stat *pstat)
481 {
482 return __page_stat__findnew_page(pstat, true);
483 }
484
485 static struct page_stat *
486 __page_stat__findnew_alloc(struct page_stat *pstat, bool create)
487 {
488 struct rb_node **node = &page_alloc_tree.rb_node;
489 struct rb_node *parent = NULL;
490 struct page_stat *data;
491 struct sort_dimension *sort;
492
493 while (*node) {
494 int cmp = 0;
495
496 parent = *node;
497 data = rb_entry(*node, struct page_stat, node);
498
499 list_for_each_entry(sort, &page_alloc_sort_input, list) {
500 cmp = sort->cmp(pstat, data);
501 if (cmp)
502 break;
503 }
504
505 if (cmp < 0)
506 node = &parent->rb_left;
507 else if (cmp > 0)
508 node = &parent->rb_right;
509 else
510 return data;
511 }
512
513 if (!create)
514 return NULL;
515
516 data = zalloc(sizeof(*data));
517 if (data != NULL) {
518 data->page = pstat->page;
519 data->order = pstat->order;
520 data->gfp_flags = pstat->gfp_flags;
521 data->migrate_type = pstat->migrate_type;
522
523 rb_link_node(&data->node, parent, node);
524 rb_insert_color(&data->node, &page_alloc_tree);
525 }
526
527 return data;
528 }
529
530 static struct page_stat *page_stat__find_alloc(struct page_stat *pstat)
531 {
532 return __page_stat__findnew_alloc(pstat, false);
533 }
534
535 static struct page_stat *page_stat__findnew_alloc(struct page_stat *pstat)
536 {
537 return __page_stat__findnew_alloc(pstat, true);
538 }
539
540 static struct page_stat *
541 __page_stat__findnew_caller(struct page_stat *pstat, bool create)
542 {
543 struct rb_node **node = &page_caller_tree.rb_node;
544 struct rb_node *parent = NULL;
545 struct page_stat *data;
546 struct sort_dimension *sort;
547
548 while (*node) {
549 int cmp = 0;
550
551 parent = *node;
552 data = rb_entry(*node, struct page_stat, node);
553
554 list_for_each_entry(sort, &page_caller_sort_input, list) {
555 cmp = sort->cmp(pstat, data);
556 if (cmp)
557 break;
558 }
559
560 if (cmp < 0)
561 node = &parent->rb_left;
562 else if (cmp > 0)
563 node = &parent->rb_right;
564 else
565 return data;
566 }
567
568 if (!create)
569 return NULL;
570
571 data = zalloc(sizeof(*data));
572 if (data != NULL) {
573 data->callsite = pstat->callsite;
574 data->order = pstat->order;
575 data->gfp_flags = pstat->gfp_flags;
576 data->migrate_type = pstat->migrate_type;
577
578 rb_link_node(&data->node, parent, node);
579 rb_insert_color(&data->node, &page_caller_tree);
580 }
581
582 return data;
583 }
584
585 static struct page_stat *page_stat__find_caller(struct page_stat *pstat)
586 {
587 return __page_stat__findnew_caller(pstat, false);
588 }
589
590 static struct page_stat *page_stat__findnew_caller(struct page_stat *pstat)
591 {
592 return __page_stat__findnew_caller(pstat, true);
593 }
594
595 static bool valid_page(u64 pfn_or_page)
596 {
597 if (use_pfn && pfn_or_page == -1UL)
598 return false;
599 if (!use_pfn && pfn_or_page == 0)
600 return false;
601 return true;
602 }
603
604 struct gfp_flag {
605 unsigned int flags;
606 char *compact_str;
607 char *human_readable;
608 };
609
610 static struct gfp_flag *gfps;
611 static int nr_gfps;
612
613 static int gfpcmp(const void *a, const void *b)
614 {
615 const struct gfp_flag *fa = a;
616 const struct gfp_flag *fb = b;
617
618 return fa->flags - fb->flags;
619 }
620
621 /* see include/trace/events/mmflags.h */
622 static const struct {
623 const char *original;
624 const char *compact;
625 } gfp_compact_table[] = {
626 { "GFP_TRANSHUGE", "THP" },
627 { "GFP_TRANSHUGE_LIGHT", "THL" },
628 { "GFP_HIGHUSER_MOVABLE", "HUM" },
629 { "GFP_HIGHUSER", "HU" },
630 { "GFP_USER", "U" },
631 { "GFP_KERNEL_ACCOUNT", "KAC" },
632 { "GFP_KERNEL", "K" },
633 { "GFP_NOFS", "NF" },
634 { "GFP_ATOMIC", "A" },
635 { "GFP_NOIO", "NI" },
636 { "GFP_NOWAIT", "NW" },
637 { "GFP_DMA", "D" },
638 { "__GFP_HIGHMEM", "HM" },
639 { "GFP_DMA32", "D32" },
640 { "__GFP_HIGH", "H" },
641 { "__GFP_ATOMIC", "_A" },
642 { "__GFP_IO", "I" },
643 { "__GFP_FS", "F" },
644 { "__GFP_NOWARN", "NWR" },
645 { "__GFP_RETRY_MAYFAIL", "R" },
646 { "__GFP_NOFAIL", "NF" },
647 { "__GFP_NORETRY", "NR" },
648 { "__GFP_COMP", "C" },
649 { "__GFP_ZERO", "Z" },
650 { "__GFP_NOMEMALLOC", "NMA" },
651 { "__GFP_MEMALLOC", "MA" },
652 { "__GFP_HARDWALL", "HW" },
653 { "__GFP_THISNODE", "TN" },
654 { "__GFP_RECLAIMABLE", "RC" },
655 { "__GFP_MOVABLE", "M" },
656 { "__GFP_ACCOUNT", "AC" },
657 { "__GFP_WRITE", "WR" },
658 { "__GFP_RECLAIM", "R" },
659 { "__GFP_DIRECT_RECLAIM", "DR" },
660 { "__GFP_KSWAPD_RECLAIM", "KR" },
661 };
662
663 static size_t max_gfp_len;
664
665 static char *compact_gfp_flags(char *gfp_flags)
666 {
667 char *orig_flags = strdup(gfp_flags);
668 char *new_flags = NULL;
669 char *str, *pos = NULL;
670 size_t len = 0;
671
672 if (orig_flags == NULL)
673 return NULL;
674
675 str = strtok_r(orig_flags, "|", &pos);
676 while (str) {
677 size_t i;
678 char *new;
679 const char *cpt;
680
681 for (i = 0; i < ARRAY_SIZE(gfp_compact_table); i++) {
682 if (strcmp(gfp_compact_table[i].original, str))
683 continue;
684
685 cpt = gfp_compact_table[i].compact;
686 new = realloc(new_flags, len + strlen(cpt) + 2);
687 if (new == NULL) {
688 free(new_flags);
689 return NULL;
690 }
691
692 new_flags = new;
693
694 if (!len) {
695 strcpy(new_flags, cpt);
696 } else {
697 strcat(new_flags, "|");
698 strcat(new_flags, cpt);
699 len++;
700 }
701
702 len += strlen(cpt);
703 }
704
705 str = strtok_r(NULL, "|", &pos);
706 }
707
708 if (max_gfp_len < len)
709 max_gfp_len = len;
710
711 free(orig_flags);
712 return new_flags;
713 }
714
715 static char *compact_gfp_string(unsigned long gfp_flags)
716 {
717 struct gfp_flag key = {
718 .flags = gfp_flags,
719 };
720 struct gfp_flag *gfp;
721
722 gfp = bsearch(&key, gfps, nr_gfps, sizeof(*gfps), gfpcmp);
723 if (gfp)
724 return gfp->compact_str;
725
726 return NULL;
727 }
728
729 static int parse_gfp_flags(struct perf_evsel *evsel, struct perf_sample *sample,
730 unsigned int gfp_flags)
731 {
732 struct pevent_record record = {
733 .cpu = sample->cpu,
734 .data = sample->raw_data,
735 .size = sample->raw_size,
736 };
737 struct trace_seq seq;
738 char *str, *pos = NULL;
739
740 if (nr_gfps) {
741 struct gfp_flag key = {
742 .flags = gfp_flags,
743 };
744
745 if (bsearch(&key, gfps, nr_gfps, sizeof(*gfps), gfpcmp))
746 return 0;
747 }
748
749 trace_seq_init(&seq);
750 pevent_event_info(&seq, evsel->tp_format, &record);
751
752 str = strtok_r(seq.buffer, " ", &pos);
753 while (str) {
754 if (!strncmp(str, "gfp_flags=", 10)) {
755 struct gfp_flag *new;
756
757 new = realloc(gfps, (nr_gfps + 1) * sizeof(*gfps));
758 if (new == NULL)
759 return -ENOMEM;
760
761 gfps = new;
762 new += nr_gfps++;
763
764 new->flags = gfp_flags;
765 new->human_readable = strdup(str + 10);
766 new->compact_str = compact_gfp_flags(str + 10);
767 if (!new->human_readable || !new->compact_str)
768 return -ENOMEM;
769
770 qsort(gfps, nr_gfps, sizeof(*gfps), gfpcmp);
771 }
772
773 str = strtok_r(NULL, " ", &pos);
774 }
775
776 trace_seq_destroy(&seq);
777 return 0;
778 }
779
780 static int perf_evsel__process_page_alloc_event(struct perf_evsel *evsel,
781 struct perf_sample *sample)
782 {
783 u64 page;
784 unsigned int order = perf_evsel__intval(evsel, sample, "order");
785 unsigned int gfp_flags = perf_evsel__intval(evsel, sample, "gfp_flags");
786 unsigned int migrate_type = perf_evsel__intval(evsel, sample,
787 "migratetype");
788 u64 bytes = kmem_page_size << order;
789 u64 callsite;
790 struct page_stat *pstat;
791 struct page_stat this = {
792 .order = order,
793 .gfp_flags = gfp_flags,
794 .migrate_type = migrate_type,
795 };
796
797 if (use_pfn)
798 page = perf_evsel__intval(evsel, sample, "pfn");
799 else
800 page = perf_evsel__intval(evsel, sample, "page");
801
802 nr_page_allocs++;
803 total_page_alloc_bytes += bytes;
804
805 if (!valid_page(page)) {
806 nr_page_fails++;
807 total_page_fail_bytes += bytes;
808
809 return 0;
810 }
811
812 if (parse_gfp_flags(evsel, sample, gfp_flags) < 0)
813 return -1;
814
815 callsite = find_callsite(evsel, sample);
816
817 /*
818 * This is to find the current page (with correct gfp flags and
819 * migrate type) at free event.
820 */
821 this.page = page;
822 pstat = page_stat__findnew_page(&this);
823 if (pstat == NULL)
824 return -ENOMEM;
825
826 pstat->nr_alloc++;
827 pstat->alloc_bytes += bytes;
828 pstat->callsite = callsite;
829
830 if (!live_page) {
831 pstat = page_stat__findnew_alloc(&this);
832 if (pstat == NULL)
833 return -ENOMEM;
834
835 pstat->nr_alloc++;
836 pstat->alloc_bytes += bytes;
837 pstat->callsite = callsite;
838 }
839
840 this.callsite = callsite;
841 pstat = page_stat__findnew_caller(&this);
842 if (pstat == NULL)
843 return -ENOMEM;
844
845 pstat->nr_alloc++;
846 pstat->alloc_bytes += bytes;
847
848 order_stats[order][migrate_type]++;
849
850 return 0;
851 }
852
853 static int perf_evsel__process_page_free_event(struct perf_evsel *evsel,
854 struct perf_sample *sample)
855 {
856 u64 page;
857 unsigned int order = perf_evsel__intval(evsel, sample, "order");
858 u64 bytes = kmem_page_size << order;
859 struct page_stat *pstat;
860 struct page_stat this = {
861 .order = order,
862 };
863
864 if (use_pfn)
865 page = perf_evsel__intval(evsel, sample, "pfn");
866 else
867 page = perf_evsel__intval(evsel, sample, "page");
868
869 nr_page_frees++;
870 total_page_free_bytes += bytes;
871
872 this.page = page;
873 pstat = page_stat__find_page(&this);
874 if (pstat == NULL) {
875 pr_debug2("missing free at page %"PRIx64" (order: %d)\n",
876 page, order);
877
878 nr_page_nomatch++;
879 total_page_nomatch_bytes += bytes;
880
881 return 0;
882 }
883
884 this.gfp_flags = pstat->gfp_flags;
885 this.migrate_type = pstat->migrate_type;
886 this.callsite = pstat->callsite;
887
888 rb_erase(&pstat->node, &page_live_tree);
889 free(pstat);
890
891 if (live_page) {
892 order_stats[this.order][this.migrate_type]--;
893 } else {
894 pstat = page_stat__find_alloc(&this);
895 if (pstat == NULL)
896 return -ENOMEM;
897
898 pstat->nr_free++;
899 pstat->free_bytes += bytes;
900 }
901
902 pstat = page_stat__find_caller(&this);
903 if (pstat == NULL)
904 return -ENOENT;
905
906 pstat->nr_free++;
907 pstat->free_bytes += bytes;
908
909 if (live_page) {
910 pstat->nr_alloc--;
911 pstat->alloc_bytes -= bytes;
912
913 if (pstat->nr_alloc == 0) {
914 rb_erase(&pstat->node, &page_caller_tree);
915 free(pstat);
916 }
917 }
918
919 return 0;
920 }
921
922 static bool perf_kmem__skip_sample(struct perf_sample *sample)
923 {
924 /* skip sample based on time? */
925 if (perf_time__skip_sample(&ptime, sample->time))
926 return true;
927
928 return false;
929 }
930
931 typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
932 struct perf_sample *sample);
933
934 static int process_sample_event(struct perf_tool *tool __maybe_unused,
935 union perf_event *event,
936 struct perf_sample *sample,
937 struct perf_evsel *evsel,
938 struct machine *machine)
939 {
940 int err = 0;
941 struct thread *thread = machine__findnew_thread(machine, sample->pid,
942 sample->tid);
943
944 if (thread == NULL) {
945 pr_debug("problem processing %d event, skipping it.\n",
946 event->header.type);
947 return -1;
948 }
949
950 if (perf_kmem__skip_sample(sample))
951 return 0;
952
953 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
954
955 if (evsel->handler != NULL) {
956 tracepoint_handler f = evsel->handler;
957 err = f(evsel, sample);
958 }
959
960 thread__put(thread);
961
962 return err;
963 }
964
965 static struct perf_tool perf_kmem = {
966 .sample = process_sample_event,
967 .comm = perf_event__process_comm,
968 .mmap = perf_event__process_mmap,
969 .mmap2 = perf_event__process_mmap2,
970 .namespaces = perf_event__process_namespaces,
971 .ordered_events = true,
972 };
973
974 static double fragmentation(unsigned long n_req, unsigned long n_alloc)
975 {
976 if (n_alloc == 0)
977 return 0.0;
978 else
979 return 100.0 - (100.0 * n_req / n_alloc);
980 }
981
982 static void __print_slab_result(struct rb_root *root,
983 struct perf_session *session,
984 int n_lines, int is_caller)
985 {
986 struct rb_node *next;
987 struct machine *machine = &session->machines.host;
988
989 printf("%.105s\n", graph_dotted_line);
990 printf(" %-34s |", is_caller ? "Callsite": "Alloc Ptr");
991 printf(" Total_alloc/Per | Total_req/Per | Hit | Ping-pong | Frag\n");
992 printf("%.105s\n", graph_dotted_line);
993
994 next = rb_first(root);
995
996 while (next && n_lines--) {
997 struct alloc_stat *data = rb_entry(next, struct alloc_stat,
998 node);
999 struct symbol *sym = NULL;
1000 struct map *map;
1001 char buf[BUFSIZ];
1002 u64 addr;
1003
1004 if (is_caller) {
1005 addr = data->call_site;
1006 if (!raw_ip)
1007 sym = machine__find_kernel_function(machine, addr, &map);
1008 } else
1009 addr = data->ptr;
1010
1011 if (sym != NULL)
1012 snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
1013 addr - map->unmap_ip(map, sym->start));
1014 else
1015 snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
1016 printf(" %-34s |", buf);
1017
1018 printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %9lu | %6.3f%%\n",
1019 (unsigned long long)data->bytes_alloc,
1020 (unsigned long)data->bytes_alloc / data->hit,
1021 (unsigned long long)data->bytes_req,
1022 (unsigned long)data->bytes_req / data->hit,
1023 (unsigned long)data->hit,
1024 (unsigned long)data->pingpong,
1025 fragmentation(data->bytes_req, data->bytes_alloc));
1026
1027 next = rb_next(next);
1028 }
1029
1030 if (n_lines == -1)
1031 printf(" ... | ... | ... | ... | ... | ... \n");
1032
1033 printf("%.105s\n", graph_dotted_line);
1034 }
1035
1036 static const char * const migrate_type_str[] = {
1037 "UNMOVABL",
1038 "RECLAIM",
1039 "MOVABLE",
1040 "RESERVED",
1041 "CMA/ISLT",
1042 "UNKNOWN",
1043 };
1044
1045 static void __print_page_alloc_result(struct perf_session *session, int n_lines)
1046 {
1047 struct rb_node *next = rb_first(&page_alloc_sorted);
1048 struct machine *machine = &session->machines.host;
1049 const char *format;
1050 int gfp_len = max(strlen("GFP flags"), max_gfp_len);
1051
1052 printf("\n%.105s\n", graph_dotted_line);
1053 printf(" %-16s | %5s alloc (KB) | Hits | Order | Mig.type | %-*s | Callsite\n",
1054 use_pfn ? "PFN" : "Page", live_page ? "Live" : "Total",
1055 gfp_len, "GFP flags");
1056 printf("%.105s\n", graph_dotted_line);
1057
1058 if (use_pfn)
1059 format = " %16llu | %'16llu | %'9d | %5d | %8s | %-*s | %s\n";
1060 else
1061 format = " %016llx | %'16llu | %'9d | %5d | %8s | %-*s | %s\n";
1062
1063 while (next && n_lines--) {
1064 struct page_stat *data;
1065 struct symbol *sym;
1066 struct map *map;
1067 char buf[32];
1068 char *caller = buf;
1069
1070 data = rb_entry(next, struct page_stat, node);
1071 sym = machine__find_kernel_function(machine, data->callsite, &map);
1072 if (sym)
1073 caller = sym->name;
1074 else
1075 scnprintf(buf, sizeof(buf), "%"PRIx64, data->callsite);
1076
1077 printf(format, (unsigned long long)data->page,
1078 (unsigned long long)data->alloc_bytes / 1024,
1079 data->nr_alloc, data->order,
1080 migrate_type_str[data->migrate_type],
1081 gfp_len, compact_gfp_string(data->gfp_flags), caller);
1082
1083 next = rb_next(next);
1084 }
1085
1086 if (n_lines == -1) {
1087 printf(" ... | ... | ... | ... | ... | %-*s | ...\n",
1088 gfp_len, "...");
1089 }
1090
1091 printf("%.105s\n", graph_dotted_line);
1092 }
1093
1094 static void __print_page_caller_result(struct perf_session *session, int n_lines)
1095 {
1096 struct rb_node *next = rb_first(&page_caller_sorted);
1097 struct machine *machine = &session->machines.host;
1098 int gfp_len = max(strlen("GFP flags"), max_gfp_len);
1099
1100 printf("\n%.105s\n", graph_dotted_line);
1101 printf(" %5s alloc (KB) | Hits | Order | Mig.type | %-*s | Callsite\n",
1102 live_page ? "Live" : "Total", gfp_len, "GFP flags");
1103 printf("%.105s\n", graph_dotted_line);
1104
1105 while (next && n_lines--) {
1106 struct page_stat *data;
1107 struct symbol *sym;
1108 struct map *map;
1109 char buf[32];
1110 char *caller = buf;
1111
1112 data = rb_entry(next, struct page_stat, node);
1113 sym = machine__find_kernel_function(machine, data->callsite, &map);
1114 if (sym)
1115 caller = sym->name;
1116 else
1117 scnprintf(buf, sizeof(buf), "%"PRIx64, data->callsite);
1118
1119 printf(" %'16llu | %'9d | %5d | %8s | %-*s | %s\n",
1120 (unsigned long long)data->alloc_bytes / 1024,
1121 data->nr_alloc, data->order,
1122 migrate_type_str[data->migrate_type],
1123 gfp_len, compact_gfp_string(data->gfp_flags), caller);
1124
1125 next = rb_next(next);
1126 }
1127
1128 if (n_lines == -1) {
1129 printf(" ... | ... | ... | ... | %-*s | ...\n",
1130 gfp_len, "...");
1131 }
1132
1133 printf("%.105s\n", graph_dotted_line);
1134 }
1135
1136 static void print_gfp_flags(void)
1137 {
1138 int i;
1139
1140 printf("#\n");
1141 printf("# GFP flags\n");
1142 printf("# ---------\n");
1143 for (i = 0; i < nr_gfps; i++) {
1144 printf("# %08x: %*s: %s\n", gfps[i].flags,
1145 (int) max_gfp_len, gfps[i].compact_str,
1146 gfps[i].human_readable);
1147 }
1148 }
1149
1150 static void print_slab_summary(void)
1151 {
1152 printf("\nSUMMARY (SLAB allocator)");
1153 printf("\n========================\n");
1154 printf("Total bytes requested: %'lu\n", total_requested);
1155 printf("Total bytes allocated: %'lu\n", total_allocated);
1156 printf("Total bytes freed: %'lu\n", total_freed);
1157 if (total_allocated > total_freed) {
1158 printf("Net total bytes allocated: %'lu\n",
1159 total_allocated - total_freed);
1160 }
1161 printf("Total bytes wasted on internal fragmentation: %'lu\n",
1162 total_allocated - total_requested);
1163 printf("Internal fragmentation: %f%%\n",
1164 fragmentation(total_requested, total_allocated));
1165 printf("Cross CPU allocations: %'lu/%'lu\n", nr_cross_allocs, nr_allocs);
1166 }
1167
1168 static void print_page_summary(void)
1169 {
1170 int o, m;
1171 u64 nr_alloc_freed = nr_page_frees - nr_page_nomatch;
1172 u64 total_alloc_freed_bytes = total_page_free_bytes - total_page_nomatch_bytes;
1173
1174 printf("\nSUMMARY (page allocator)");
1175 printf("\n========================\n");
1176 printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total allocation requests",
1177 nr_page_allocs, total_page_alloc_bytes / 1024);
1178 printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total free requests",
1179 nr_page_frees, total_page_free_bytes / 1024);
1180 printf("\n");
1181
1182 printf("%-30s: %'16"PRIu64" [ %'16"PRIu64" KB ]\n", "Total alloc+freed requests",
1183 nr_alloc_freed, (total_alloc_freed_bytes) / 1024);
1184 printf("%-30s: %'16"PRIu64" [ %'16"PRIu64" KB ]\n", "Total alloc-only requests",
1185 nr_page_allocs - nr_alloc_freed,
1186 (total_page_alloc_bytes - total_alloc_freed_bytes) / 1024);
1187 printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total free-only requests",
1188 nr_page_nomatch, total_page_nomatch_bytes / 1024);
1189 printf("\n");
1190
1191 printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total allocation failures",
1192 nr_page_fails, total_page_fail_bytes / 1024);
1193 printf("\n");
1194
1195 printf("%5s %12s %12s %12s %12s %12s\n", "Order", "Unmovable",
1196 "Reclaimable", "Movable", "Reserved", "CMA/Isolated");
1197 printf("%.5s %.12s %.12s %.12s %.12s %.12s\n", graph_dotted_line,
1198 graph_dotted_line, graph_dotted_line, graph_dotted_line,
1199 graph_dotted_line, graph_dotted_line);
1200
1201 for (o = 0; o < MAX_PAGE_ORDER; o++) {
1202 printf("%5d", o);
1203 for (m = 0; m < MAX_MIGRATE_TYPES - 1; m++) {
1204 if (order_stats[o][m])
1205 printf(" %'12d", order_stats[o][m]);
1206 else
1207 printf(" %12c", '.');
1208 }
1209 printf("\n");
1210 }
1211 }
1212
1213 static void print_slab_result(struct perf_session *session)
1214 {
1215 if (caller_flag)
1216 __print_slab_result(&root_caller_sorted, session, caller_lines, 1);
1217 if (alloc_flag)
1218 __print_slab_result(&root_alloc_sorted, session, alloc_lines, 0);
1219 print_slab_summary();
1220 }
1221
1222 static void print_page_result(struct perf_session *session)
1223 {
1224 if (caller_flag || alloc_flag)
1225 print_gfp_flags();
1226 if (caller_flag)
1227 __print_page_caller_result(session, caller_lines);
1228 if (alloc_flag)
1229 __print_page_alloc_result(session, alloc_lines);
1230 print_page_summary();
1231 }
1232
1233 static void print_result(struct perf_session *session)
1234 {
1235 if (kmem_slab)
1236 print_slab_result(session);
1237 if (kmem_page)
1238 print_page_result(session);
1239 }
1240
1241 static LIST_HEAD(slab_caller_sort);
1242 static LIST_HEAD(slab_alloc_sort);
1243 static LIST_HEAD(page_caller_sort);
1244 static LIST_HEAD(page_alloc_sort);
1245
1246 static void sort_slab_insert(struct rb_root *root, struct alloc_stat *data,
1247 struct list_head *sort_list)
1248 {
1249 struct rb_node **new = &(root->rb_node);
1250 struct rb_node *parent = NULL;
1251 struct sort_dimension *sort;
1252
1253 while (*new) {
1254 struct alloc_stat *this;
1255 int cmp = 0;
1256
1257 this = rb_entry(*new, struct alloc_stat, node);
1258 parent = *new;
1259
1260 list_for_each_entry(sort, sort_list, list) {
1261 cmp = sort->cmp(data, this);
1262 if (cmp)
1263 break;
1264 }
1265
1266 if (cmp > 0)
1267 new = &((*new)->rb_left);
1268 else
1269 new = &((*new)->rb_right);
1270 }
1271
1272 rb_link_node(&data->node, parent, new);
1273 rb_insert_color(&data->node, root);
1274 }
1275
1276 static void __sort_slab_result(struct rb_root *root, struct rb_root *root_sorted,
1277 struct list_head *sort_list)
1278 {
1279 struct rb_node *node;
1280 struct alloc_stat *data;
1281
1282 for (;;) {
1283 node = rb_first(root);
1284 if (!node)
1285 break;
1286
1287 rb_erase(node, root);
1288 data = rb_entry(node, struct alloc_stat, node);
1289 sort_slab_insert(root_sorted, data, sort_list);
1290 }
1291 }
1292
1293 static void sort_page_insert(struct rb_root *root, struct page_stat *data,
1294 struct list_head *sort_list)
1295 {
1296 struct rb_node **new = &root->rb_node;
1297 struct rb_node *parent = NULL;
1298 struct sort_dimension *sort;
1299
1300 while (*new) {
1301 struct page_stat *this;
1302 int cmp = 0;
1303
1304 this = rb_entry(*new, struct page_stat, node);
1305 parent = *new;
1306
1307 list_for_each_entry(sort, sort_list, list) {
1308 cmp = sort->cmp(data, this);
1309 if (cmp)
1310 break;
1311 }
1312
1313 if (cmp > 0)
1314 new = &parent->rb_left;
1315 else
1316 new = &parent->rb_right;
1317 }
1318
1319 rb_link_node(&data->node, parent, new);
1320 rb_insert_color(&data->node, root);
1321 }
1322
1323 static void __sort_page_result(struct rb_root *root, struct rb_root *root_sorted,
1324 struct list_head *sort_list)
1325 {
1326 struct rb_node *node;
1327 struct page_stat *data;
1328
1329 for (;;) {
1330 node = rb_first(root);
1331 if (!node)
1332 break;
1333
1334 rb_erase(node, root);
1335 data = rb_entry(node, struct page_stat, node);
1336 sort_page_insert(root_sorted, data, sort_list);
1337 }
1338 }
1339
1340 static void sort_result(void)
1341 {
1342 if (kmem_slab) {
1343 __sort_slab_result(&root_alloc_stat, &root_alloc_sorted,
1344 &slab_alloc_sort);
1345 __sort_slab_result(&root_caller_stat, &root_caller_sorted,
1346 &slab_caller_sort);
1347 }
1348 if (kmem_page) {
1349 if (live_page)
1350 __sort_page_result(&page_live_tree, &page_alloc_sorted,
1351 &page_alloc_sort);
1352 else
1353 __sort_page_result(&page_alloc_tree, &page_alloc_sorted,
1354 &page_alloc_sort);
1355
1356 __sort_page_result(&page_caller_tree, &page_caller_sorted,
1357 &page_caller_sort);
1358 }
1359 }
1360
1361 static int __cmd_kmem(struct perf_session *session)
1362 {
1363 int err = -EINVAL;
1364 struct perf_evsel *evsel;
1365 const struct perf_evsel_str_handler kmem_tracepoints[] = {
1366 /* slab allocator */
1367 { "kmem:kmalloc", perf_evsel__process_alloc_event, },
1368 { "kmem:kmem_cache_alloc", perf_evsel__process_alloc_event, },
1369 { "kmem:kmalloc_node", perf_evsel__process_alloc_node_event, },
1370 { "kmem:kmem_cache_alloc_node", perf_evsel__process_alloc_node_event, },
1371 { "kmem:kfree", perf_evsel__process_free_event, },
1372 { "kmem:kmem_cache_free", perf_evsel__process_free_event, },
1373 /* page allocator */
1374 { "kmem:mm_page_alloc", perf_evsel__process_page_alloc_event, },
1375 { "kmem:mm_page_free", perf_evsel__process_page_free_event, },
1376 };
1377
1378 if (!perf_session__has_traces(session, "kmem record"))
1379 goto out;
1380
1381 if (perf_session__set_tracepoints_handlers(session, kmem_tracepoints)) {
1382 pr_err("Initializing perf session tracepoint handlers failed\n");
1383 goto out;
1384 }
1385
1386 evlist__for_each_entry(session->evlist, evsel) {
1387 if (!strcmp(perf_evsel__name(evsel), "kmem:mm_page_alloc") &&
1388 perf_evsel__field(evsel, "pfn")) {
1389 use_pfn = true;
1390 break;
1391 }
1392 }
1393
1394 setup_pager();
1395 err = perf_session__process_events(session);
1396 if (err != 0) {
1397 pr_err("error during process events: %d\n", err);
1398 goto out;
1399 }
1400 sort_result();
1401 print_result(session);
1402 out:
1403 return err;
1404 }
1405
1406 /* slab sort keys */
1407 static int ptr_cmp(void *a, void *b)
1408 {
1409 struct alloc_stat *l = a;
1410 struct alloc_stat *r = b;
1411
1412 if (l->ptr < r->ptr)
1413 return -1;
1414 else if (l->ptr > r->ptr)
1415 return 1;
1416 return 0;
1417 }
1418
1419 static struct sort_dimension ptr_sort_dimension = {
1420 .name = "ptr",
1421 .cmp = ptr_cmp,
1422 };
1423
1424 static int slab_callsite_cmp(void *a, void *b)
1425 {
1426 struct alloc_stat *l = a;
1427 struct alloc_stat *r = b;
1428
1429 if (l->call_site < r->call_site)
1430 return -1;
1431 else if (l->call_site > r->call_site)
1432 return 1;
1433 return 0;
1434 }
1435
1436 static struct sort_dimension callsite_sort_dimension = {
1437 .name = "callsite",
1438 .cmp = slab_callsite_cmp,
1439 };
1440
1441 static int hit_cmp(void *a, void *b)
1442 {
1443 struct alloc_stat *l = a;
1444 struct alloc_stat *r = b;
1445
1446 if (l->hit < r->hit)
1447 return -1;
1448 else if (l->hit > r->hit)
1449 return 1;
1450 return 0;
1451 }
1452
1453 static struct sort_dimension hit_sort_dimension = {
1454 .name = "hit",
1455 .cmp = hit_cmp,
1456 };
1457
1458 static int bytes_cmp(void *a, void *b)
1459 {
1460 struct alloc_stat *l = a;
1461 struct alloc_stat *r = b;
1462
1463 if (l->bytes_alloc < r->bytes_alloc)
1464 return -1;
1465 else if (l->bytes_alloc > r->bytes_alloc)
1466 return 1;
1467 return 0;
1468 }
1469
1470 static struct sort_dimension bytes_sort_dimension = {
1471 .name = "bytes",
1472 .cmp = bytes_cmp,
1473 };
1474
1475 static int frag_cmp(void *a, void *b)
1476 {
1477 double x, y;
1478 struct alloc_stat *l = a;
1479 struct alloc_stat *r = b;
1480
1481 x = fragmentation(l->bytes_req, l->bytes_alloc);
1482 y = fragmentation(r->bytes_req, r->bytes_alloc);
1483
1484 if (x < y)
1485 return -1;
1486 else if (x > y)
1487 return 1;
1488 return 0;
1489 }
1490
1491 static struct sort_dimension frag_sort_dimension = {
1492 .name = "frag",
1493 .cmp = frag_cmp,
1494 };
1495
1496 static int pingpong_cmp(void *a, void *b)
1497 {
1498 struct alloc_stat *l = a;
1499 struct alloc_stat *r = b;
1500
1501 if (l->pingpong < r->pingpong)
1502 return -1;
1503 else if (l->pingpong > r->pingpong)
1504 return 1;
1505 return 0;
1506 }
1507
1508 static struct sort_dimension pingpong_sort_dimension = {
1509 .name = "pingpong",
1510 .cmp = pingpong_cmp,
1511 };
1512
1513 /* page sort keys */
1514 static int page_cmp(void *a, void *b)
1515 {
1516 struct page_stat *l = a;
1517 struct page_stat *r = b;
1518
1519 if (l->page < r->page)
1520 return -1;
1521 else if (l->page > r->page)
1522 return 1;
1523 return 0;
1524 }
1525
1526 static struct sort_dimension page_sort_dimension = {
1527 .name = "page",
1528 .cmp = page_cmp,
1529 };
1530
1531 static int page_callsite_cmp(void *a, void *b)
1532 {
1533 struct page_stat *l = a;
1534 struct page_stat *r = b;
1535
1536 if (l->callsite < r->callsite)
1537 return -1;
1538 else if (l->callsite > r->callsite)
1539 return 1;
1540 return 0;
1541 }
1542
1543 static struct sort_dimension page_callsite_sort_dimension = {
1544 .name = "callsite",
1545 .cmp = page_callsite_cmp,
1546 };
1547
1548 static int page_hit_cmp(void *a, void *b)
1549 {
1550 struct page_stat *l = a;
1551 struct page_stat *r = b;
1552
1553 if (l->nr_alloc < r->nr_alloc)
1554 return -1;
1555 else if (l->nr_alloc > r->nr_alloc)
1556 return 1;
1557 return 0;
1558 }
1559
1560 static struct sort_dimension page_hit_sort_dimension = {
1561 .name = "hit",
1562 .cmp = page_hit_cmp,
1563 };
1564
1565 static int page_bytes_cmp(void *a, void *b)
1566 {
1567 struct page_stat *l = a;
1568 struct page_stat *r = b;
1569
1570 if (l->alloc_bytes < r->alloc_bytes)
1571 return -1;
1572 else if (l->alloc_bytes > r->alloc_bytes)
1573 return 1;
1574 return 0;
1575 }
1576
1577 static struct sort_dimension page_bytes_sort_dimension = {
1578 .name = "bytes",
1579 .cmp = page_bytes_cmp,
1580 };
1581
1582 static int page_order_cmp(void *a, void *b)
1583 {
1584 struct page_stat *l = a;
1585 struct page_stat *r = b;
1586
1587 if (l->order < r->order)
1588 return -1;
1589 else if (l->order > r->order)
1590 return 1;
1591 return 0;
1592 }
1593
1594 static struct sort_dimension page_order_sort_dimension = {
1595 .name = "order",
1596 .cmp = page_order_cmp,
1597 };
1598
1599 static int migrate_type_cmp(void *a, void *b)
1600 {
1601 struct page_stat *l = a;
1602 struct page_stat *r = b;
1603
1604 /* for internal use to find free'd page */
1605 if (l->migrate_type == -1U)
1606 return 0;
1607
1608 if (l->migrate_type < r->migrate_type)
1609 return -1;
1610 else if (l->migrate_type > r->migrate_type)
1611 return 1;
1612 return 0;
1613 }
1614
1615 static struct sort_dimension migrate_type_sort_dimension = {
1616 .name = "migtype",
1617 .cmp = migrate_type_cmp,
1618 };
1619
1620 static int gfp_flags_cmp(void *a, void *b)
1621 {
1622 struct page_stat *l = a;
1623 struct page_stat *r = b;
1624
1625 /* for internal use to find free'd page */
1626 if (l->gfp_flags == -1U)
1627 return 0;
1628
1629 if (l->gfp_flags < r->gfp_flags)
1630 return -1;
1631 else if (l->gfp_flags > r->gfp_flags)
1632 return 1;
1633 return 0;
1634 }
1635
1636 static struct sort_dimension gfp_flags_sort_dimension = {
1637 .name = "gfp",
1638 .cmp = gfp_flags_cmp,
1639 };
1640
1641 static struct sort_dimension *slab_sorts[] = {
1642 &ptr_sort_dimension,
1643 &callsite_sort_dimension,
1644 &hit_sort_dimension,
1645 &bytes_sort_dimension,
1646 &frag_sort_dimension,
1647 &pingpong_sort_dimension,
1648 };
1649
1650 static struct sort_dimension *page_sorts[] = {
1651 &page_sort_dimension,
1652 &page_callsite_sort_dimension,
1653 &page_hit_sort_dimension,
1654 &page_bytes_sort_dimension,
1655 &page_order_sort_dimension,
1656 &migrate_type_sort_dimension,
1657 &gfp_flags_sort_dimension,
1658 };
1659
1660 static int slab_sort_dimension__add(const char *tok, struct list_head *list)
1661 {
1662 struct sort_dimension *sort;
1663 int i;
1664
1665 for (i = 0; i < (int)ARRAY_SIZE(slab_sorts); i++) {
1666 if (!strcmp(slab_sorts[i]->name, tok)) {
1667 sort = memdup(slab_sorts[i], sizeof(*slab_sorts[i]));
1668 if (!sort) {
1669 pr_err("%s: memdup failed\n", __func__);
1670 return -1;
1671 }
1672 list_add_tail(&sort->list, list);
1673 return 0;
1674 }
1675 }
1676
1677 return -1;
1678 }
1679
1680 static int page_sort_dimension__add(const char *tok, struct list_head *list)
1681 {
1682 struct sort_dimension *sort;
1683 int i;
1684
1685 for (i = 0; i < (int)ARRAY_SIZE(page_sorts); i++) {
1686 if (!strcmp(page_sorts[i]->name, tok)) {
1687 sort = memdup(page_sorts[i], sizeof(*page_sorts[i]));
1688 if (!sort) {
1689 pr_err("%s: memdup failed\n", __func__);
1690 return -1;
1691 }
1692 list_add_tail(&sort->list, list);
1693 return 0;
1694 }
1695 }
1696
1697 return -1;
1698 }
1699
1700 static int setup_slab_sorting(struct list_head *sort_list, const char *arg)
1701 {
1702 char *tok;
1703 char *str = strdup(arg);
1704 char *pos = str;
1705
1706 if (!str) {
1707 pr_err("%s: strdup failed\n", __func__);
1708 return -1;
1709 }
1710
1711 while (true) {
1712 tok = strsep(&pos, ",");
1713 if (!tok)
1714 break;
1715 if (slab_sort_dimension__add(tok, sort_list) < 0) {
1716 pr_err("Unknown slab --sort key: '%s'", tok);
1717 free(str);
1718 return -1;
1719 }
1720 }
1721
1722 free(str);
1723 return 0;
1724 }
1725
1726 static int setup_page_sorting(struct list_head *sort_list, const char *arg)
1727 {
1728 char *tok;
1729 char *str = strdup(arg);
1730 char *pos = str;
1731
1732 if (!str) {
1733 pr_err("%s: strdup failed\n", __func__);
1734 return -1;
1735 }
1736
1737 while (true) {
1738 tok = strsep(&pos, ",");
1739 if (!tok)
1740 break;
1741 if (page_sort_dimension__add(tok, sort_list) < 0) {
1742 pr_err("Unknown page --sort key: '%s'", tok);
1743 free(str);
1744 return -1;
1745 }
1746 }
1747
1748 free(str);
1749 return 0;
1750 }
1751
1752 static int parse_sort_opt(const struct option *opt __maybe_unused,
1753 const char *arg, int unset __maybe_unused)
1754 {
1755 if (!arg)
1756 return -1;
1757
1758 if (kmem_page > kmem_slab ||
1759 (kmem_page == 0 && kmem_slab == 0 && kmem_default == KMEM_PAGE)) {
1760 if (caller_flag > alloc_flag)
1761 return setup_page_sorting(&page_caller_sort, arg);
1762 else
1763 return setup_page_sorting(&page_alloc_sort, arg);
1764 } else {
1765 if (caller_flag > alloc_flag)
1766 return setup_slab_sorting(&slab_caller_sort, arg);
1767 else
1768 return setup_slab_sorting(&slab_alloc_sort, arg);
1769 }
1770
1771 return 0;
1772 }
1773
1774 static int parse_caller_opt(const struct option *opt __maybe_unused,
1775 const char *arg __maybe_unused,
1776 int unset __maybe_unused)
1777 {
1778 caller_flag = (alloc_flag + 1);
1779 return 0;
1780 }
1781
1782 static int parse_alloc_opt(const struct option *opt __maybe_unused,
1783 const char *arg __maybe_unused,
1784 int unset __maybe_unused)
1785 {
1786 alloc_flag = (caller_flag + 1);
1787 return 0;
1788 }
1789
1790 static int parse_slab_opt(const struct option *opt __maybe_unused,
1791 const char *arg __maybe_unused,
1792 int unset __maybe_unused)
1793 {
1794 kmem_slab = (kmem_page + 1);
1795 return 0;
1796 }
1797
1798 static int parse_page_opt(const struct option *opt __maybe_unused,
1799 const char *arg __maybe_unused,
1800 int unset __maybe_unused)
1801 {
1802 kmem_page = (kmem_slab + 1);
1803 return 0;
1804 }
1805
1806 static int parse_line_opt(const struct option *opt __maybe_unused,
1807 const char *arg, int unset __maybe_unused)
1808 {
1809 int lines;
1810
1811 if (!arg)
1812 return -1;
1813
1814 lines = strtoul(arg, NULL, 10);
1815
1816 if (caller_flag > alloc_flag)
1817 caller_lines = lines;
1818 else
1819 alloc_lines = lines;
1820
1821 return 0;
1822 }
1823
1824 static int __cmd_record(int argc, const char **argv)
1825 {
1826 const char * const record_args[] = {
1827 "record", "-a", "-R", "-c", "1",
1828 };
1829 const char * const slab_events[] = {
1830 "-e", "kmem:kmalloc",
1831 "-e", "kmem:kmalloc_node",
1832 "-e", "kmem:kfree",
1833 "-e", "kmem:kmem_cache_alloc",
1834 "-e", "kmem:kmem_cache_alloc_node",
1835 "-e", "kmem:kmem_cache_free",
1836 };
1837 const char * const page_events[] = {
1838 "-e", "kmem:mm_page_alloc",
1839 "-e", "kmem:mm_page_free",
1840 };
1841 unsigned int rec_argc, i, j;
1842 const char **rec_argv;
1843
1844 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
1845 if (kmem_slab)
1846 rec_argc += ARRAY_SIZE(slab_events);
1847 if (kmem_page)
1848 rec_argc += ARRAY_SIZE(page_events) + 1; /* for -g */
1849
1850 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1851
1852 if (rec_argv == NULL)
1853 return -ENOMEM;
1854
1855 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1856 rec_argv[i] = strdup(record_args[i]);
1857
1858 if (kmem_slab) {
1859 for (j = 0; j < ARRAY_SIZE(slab_events); j++, i++)
1860 rec_argv[i] = strdup(slab_events[j]);
1861 }
1862 if (kmem_page) {
1863 rec_argv[i++] = strdup("-g");
1864
1865 for (j = 0; j < ARRAY_SIZE(page_events); j++, i++)
1866 rec_argv[i] = strdup(page_events[j]);
1867 }
1868
1869 for (j = 1; j < (unsigned int)argc; j++, i++)
1870 rec_argv[i] = argv[j];
1871
1872 return cmd_record(i, rec_argv);
1873 }
1874
1875 static int kmem_config(const char *var, const char *value, void *cb __maybe_unused)
1876 {
1877 if (!strcmp(var, "kmem.default")) {
1878 if (!strcmp(value, "slab"))
1879 kmem_default = KMEM_SLAB;
1880 else if (!strcmp(value, "page"))
1881 kmem_default = KMEM_PAGE;
1882 else
1883 pr_err("invalid default value ('slab' or 'page' required): %s\n",
1884 value);
1885 return 0;
1886 }
1887
1888 return 0;
1889 }
1890
1891 int cmd_kmem(int argc, const char **argv)
1892 {
1893 const char * const default_slab_sort = "frag,hit,bytes";
1894 const char * const default_page_sort = "bytes,hit";
1895 struct perf_data data = {
1896 .mode = PERF_DATA_MODE_READ,
1897 };
1898 const struct option kmem_options[] = {
1899 OPT_STRING('i', "input", &input_name, "file", "input file name"),
1900 OPT_INCR('v', "verbose", &verbose,
1901 "be more verbose (show symbol address, etc)"),
1902 OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
1903 "show per-callsite statistics", parse_caller_opt),
1904 OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
1905 "show per-allocation statistics", parse_alloc_opt),
1906 OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
1907 "sort by keys: ptr, callsite, bytes, hit, pingpong, frag, "
1908 "page, order, migtype, gfp", parse_sort_opt),
1909 OPT_CALLBACK('l', "line", NULL, "num", "show n lines", parse_line_opt),
1910 OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
1911 OPT_BOOLEAN('f', "force", &data.force, "don't complain, do it"),
1912 OPT_CALLBACK_NOOPT(0, "slab", NULL, NULL, "Analyze slab allocator",
1913 parse_slab_opt),
1914 OPT_CALLBACK_NOOPT(0, "page", NULL, NULL, "Analyze page allocator",
1915 parse_page_opt),
1916 OPT_BOOLEAN(0, "live", &live_page, "Show live page stat"),
1917 OPT_STRING(0, "time", &time_str, "str",
1918 "Time span of interest (start,stop)"),
1919 OPT_END()
1920 };
1921 const char *const kmem_subcommands[] = { "record", "stat", NULL };
1922 const char *kmem_usage[] = {
1923 NULL,
1924 NULL
1925 };
1926 struct perf_session *session;
1927 const char errmsg[] = "No %s allocation events found. Have you run 'perf kmem record --%s'?\n";
1928 int ret = perf_config(kmem_config, NULL);
1929
1930 if (ret)
1931 return ret;
1932
1933 argc = parse_options_subcommand(argc, argv, kmem_options,
1934 kmem_subcommands, kmem_usage, 0);
1935
1936 if (!argc)
1937 usage_with_options(kmem_usage, kmem_options);
1938
1939 if (kmem_slab == 0 && kmem_page == 0) {
1940 if (kmem_default == KMEM_SLAB)
1941 kmem_slab = 1;
1942 else
1943 kmem_page = 1;
1944 }
1945
1946 if (!strncmp(argv[0], "rec", 3)) {
1947 symbol__init(NULL);
1948 return __cmd_record(argc, argv);
1949 }
1950
1951 data.file.path = input_name;
1952
1953 kmem_session = session = perf_session__new(&data, false, &perf_kmem);
1954 if (session == NULL)
1955 return -1;
1956
1957 ret = -1;
1958
1959 if (kmem_slab) {
1960 if (!perf_evlist__find_tracepoint_by_name(session->evlist,
1961 "kmem:kmalloc")) {
1962 pr_err(errmsg, "slab", "slab");
1963 goto out_delete;
1964 }
1965 }
1966
1967 if (kmem_page) {
1968 struct perf_evsel *evsel;
1969
1970 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
1971 "kmem:mm_page_alloc");
1972 if (evsel == NULL) {
1973 pr_err(errmsg, "page", "page");
1974 goto out_delete;
1975 }
1976
1977 kmem_page_size = pevent_get_page_size(evsel->tp_format->pevent);
1978 symbol_conf.use_callchain = true;
1979 }
1980
1981 symbol__init(&session->header.env);
1982
1983 if (perf_time__parse_str(&ptime, time_str) != 0) {
1984 pr_err("Invalid time string\n");
1985 ret = -EINVAL;
1986 goto out_delete;
1987 }
1988
1989 if (!strcmp(argv[0], "stat")) {
1990 setlocale(LC_ALL, "");
1991
1992 if (cpu__setup_cpunode_map())
1993 goto out_delete;
1994
1995 if (list_empty(&slab_caller_sort))
1996 setup_slab_sorting(&slab_caller_sort, default_slab_sort);
1997 if (list_empty(&slab_alloc_sort))
1998 setup_slab_sorting(&slab_alloc_sort, default_slab_sort);
1999 if (list_empty(&page_caller_sort))
2000 setup_page_sorting(&page_caller_sort, default_page_sort);
2001 if (list_empty(&page_alloc_sort))
2002 setup_page_sorting(&page_alloc_sort, default_page_sort);
2003
2004 if (kmem_page) {
2005 setup_page_sorting(&page_alloc_sort_input,
2006 "page,order,migtype,gfp");
2007 setup_page_sorting(&page_caller_sort_input,
2008 "callsite,order,migtype,gfp");
2009 }
2010 ret = __cmd_kmem(session);
2011 } else
2012 usage_with_options(kmem_usage, kmem_options);
2013
2014 out_delete:
2015 perf_session__delete(session);
2016
2017 return ret;
2018 }
2019
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