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