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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
27static int kmem_slab;
28static int kmem_page;
29
30static long kmem_page_size;
31static enum {
32 KMEM_SLAB,
33 KMEM_PAGE,
34} kmem_default = KMEM_SLAB; /* for backward compatibility */
35
36struct alloc_stat;
37typedef int (*sort_fn_t)(void *, void *);
38
39static int alloc_flag;
40static int caller_flag;
41
42static int alloc_lines = -1;
43static int caller_lines = -1;
44
45static bool raw_ip;
46
47struct 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
60static struct rb_root root_alloc_stat;
61static struct rb_root root_alloc_sorted;
62static struct rb_root root_caller_stat;
63static struct rb_root root_caller_sorted;
64
65static unsigned long total_requested, total_allocated;
66static unsigned long nr_allocs, nr_cross_allocs;
67
68static 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
111static 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
153static 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
172static 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
188static int ptr_cmp(void *, void *);
189static int slab_callsite_cmp(void *, void *);
190
191static 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
216static 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
241static u64 total_page_alloc_bytes;
242static u64 total_page_free_bytes;
243static u64 total_page_nomatch_bytes;
244static u64 total_page_fail_bytes;
245static unsigned long nr_page_allocs;
246static unsigned long nr_page_frees;
247static unsigned long nr_page_fails;
248static unsigned long nr_page_nomatch;
249
250static bool use_pfn;
251static bool live_page;
252static struct perf_session *kmem_session;
253
254#define MAX_MIGRATE_TYPES 6
255#define MAX_PAGE_ORDER 11
256
257static int order_stats[MAX_PAGE_ORDER][MAX_MIGRATE_TYPES];
258
259struct 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
272static struct rb_root page_live_tree;
273static struct rb_root page_alloc_tree;
274static struct rb_root page_alloc_sorted;
275static struct rb_root page_caller_tree;
276static struct rb_root page_caller_sorted;
277
278struct alloc_func {
279 u64 start;
280 u64 end;
281 char *name;
282};
283
284static int nr_alloc_funcs;
285static struct alloc_func *alloc_func_list;
286
287static 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
298static 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
312static 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 */
366static 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
406out:
407 pr_debug2("unknown callsite: %"PRIx64 "\n", sample->ip);
408 return sample->ip;
409}
410
411struct sort_dimension {
412 const char name[20];
413 sort_fn_t cmp;
414 struct list_head list;
415};
416
417static LIST_HEAD(page_alloc_sort_input);
418static LIST_HEAD(page_caller_sort_input);
419
420static 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
459static struct page_stat *page_stat__find_page(struct page_stat *pstat)
460{
461 return __page_stat__findnew_page(pstat, false);
462}
463
464static struct page_stat *page_stat__findnew_page(struct page_stat *pstat)
465{
466 return __page_stat__findnew_page(pstat, true);
467}
468
469static 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
514static struct page_stat *page_stat__find_alloc(struct page_stat *pstat)
515{
516 return __page_stat__findnew_alloc(pstat, false);
517}
518
519static struct page_stat *page_stat__findnew_alloc(struct page_stat *pstat)
520{
521 return __page_stat__findnew_alloc(pstat, true);
522}
523
524static 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
569static struct page_stat *page_stat__find_caller(struct page_stat *pstat)
570{
571 return __page_stat__findnew_caller(pstat, false);
572}
573
574static struct page_stat *page_stat__findnew_caller(struct page_stat *pstat)
575{
576 return __page_stat__findnew_caller(pstat, true);
577}
578
579static 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
588struct gfp_flag {
589 unsigned int flags;
590 char *compact_str;
591 char *human_readable;
592};
593
594static struct gfp_flag *gfps;
595static int nr_gfps;
596
597static 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/mmflags.h */
606static 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_ACCOUNT", "KAC" },
616 { "GFP_KERNEL", "K" },
617 { "GFP_NOFS", "NF" },
618 { "GFP_ATOMIC", "A" },
619 { "GFP_NOIO", "NI" },
620 { "GFP_NOWAIT", "NW" },
621 { "GFP_DMA", "D" },
622 { "__GFP_HIGHMEM", "HM" },
623 { "GFP_DMA32", "D32" },
624 { "__GFP_HIGH", "H" },
625 { "__GFP_ATOMIC", "_A" },
626 { "__GFP_IO", "I" },
627 { "__GFP_FS", "F" },
628 { "__GFP_COLD", "CO" },
629 { "__GFP_NOWARN", "NWR" },
630 { "__GFP_REPEAT", "R" },
631 { "__GFP_NOFAIL", "NF" },
632 { "__GFP_NORETRY", "NR" },
633 { "__GFP_COMP", "C" },
634 { "__GFP_ZERO", "Z" },
635 { "__GFP_NOMEMALLOC", "NMA" },
636 { "__GFP_MEMALLOC", "MA" },
637 { "__GFP_HARDWALL", "HW" },
638 { "__GFP_THISNODE", "TN" },
639 { "__GFP_RECLAIMABLE", "RC" },
640 { "__GFP_MOVABLE", "M" },
641 { "__GFP_ACCOUNT", "AC" },
642 { "__GFP_NOTRACK", "NT" },
643 { "__GFP_WRITE", "WR" },
644 { "__GFP_RECLAIM", "R" },
645 { "__GFP_DIRECT_RECLAIM", "DR" },
646 { "__GFP_KSWAPD_RECLAIM", "KR" },
647 { "__GFP_OTHER_NODE", "ON" },
648};
649
650static size_t max_gfp_len;
651
652static char *compact_gfp_flags(char *gfp_flags)
653{
654 char *orig_flags = strdup(gfp_flags);
655 char *new_flags = NULL;
656 char *str, *pos = NULL;
657 size_t len = 0;
658
659 if (orig_flags == NULL)
660 return NULL;
661
662 str = strtok_r(orig_flags, "|", &pos);
663 while (str) {
664 size_t i;
665 char *new;
666 const char *cpt;
667
668 for (i = 0; i < ARRAY_SIZE(gfp_compact_table); i++) {
669 if (strcmp(gfp_compact_table[i].original, str))
670 continue;
671
672 cpt = gfp_compact_table[i].compact;
673 new = realloc(new_flags, len + strlen(cpt) + 2);
674 if (new == NULL) {
675 free(new_flags);
676 return NULL;
677 }
678
679 new_flags = new;
680
681 if (!len) {
682 strcpy(new_flags, cpt);
683 } else {
684 strcat(new_flags, "|");
685 strcat(new_flags, cpt);
686 len++;
687 }
688
689 len += strlen(cpt);
690 }
691
692 str = strtok_r(NULL, "|", &pos);
693 }
694
695 if (max_gfp_len < len)
696 max_gfp_len = len;
697
698 free(orig_flags);
699 return new_flags;
700}
701
702static char *compact_gfp_string(unsigned long gfp_flags)
703{
704 struct gfp_flag key = {
705 .flags = gfp_flags,
706 };
707 struct gfp_flag *gfp;
708
709 gfp = bsearch(&key, gfps, nr_gfps, sizeof(*gfps), gfpcmp);
710 if (gfp)
711 return gfp->compact_str;
712
713 return NULL;
714}
715
716static int parse_gfp_flags(struct perf_evsel *evsel, struct perf_sample *sample,
717 unsigned int gfp_flags)
718{
719 struct pevent_record record = {
720 .cpu = sample->cpu,
721 .data = sample->raw_data,
722 .size = sample->raw_size,
723 };
724 struct trace_seq seq;
725 char *str, *pos = NULL;
726
727 if (nr_gfps) {
728 struct gfp_flag key = {
729 .flags = gfp_flags,
730 };
731
732 if (bsearch(&key, gfps, nr_gfps, sizeof(*gfps), gfpcmp))
733 return 0;
734 }
735
736 trace_seq_init(&seq);
737 pevent_event_info(&seq, evsel->tp_format, &record);
738
739 str = strtok_r(seq.buffer, " ", &pos);
740 while (str) {
741 if (!strncmp(str, "gfp_flags=", 10)) {
742 struct gfp_flag *new;
743
744 new = realloc(gfps, (nr_gfps + 1) * sizeof(*gfps));
745 if (new == NULL)
746 return -ENOMEM;
747
748 gfps = new;
749 new += nr_gfps++;
750
751 new->flags = gfp_flags;
752 new->human_readable = strdup(str + 10);
753 new->compact_str = compact_gfp_flags(str + 10);
754 if (!new->human_readable || !new->compact_str)
755 return -ENOMEM;
756
757 qsort(gfps, nr_gfps, sizeof(*gfps), gfpcmp);
758 }
759
760 str = strtok_r(NULL, " ", &pos);
761 }
762
763 trace_seq_destroy(&seq);
764 return 0;
765}
766
767static int perf_evsel__process_page_alloc_event(struct perf_evsel *evsel,
768 struct perf_sample *sample)
769{
770 u64 page;
771 unsigned int order = perf_evsel__intval(evsel, sample, "order");
772 unsigned int gfp_flags = perf_evsel__intval(evsel, sample, "gfp_flags");
773 unsigned int migrate_type = perf_evsel__intval(evsel, sample,
774 "migratetype");
775 u64 bytes = kmem_page_size << order;
776 u64 callsite;
777 struct page_stat *pstat;
778 struct page_stat this = {
779 .order = order,
780 .gfp_flags = gfp_flags,
781 .migrate_type = migrate_type,
782 };
783
784 if (use_pfn)
785 page = perf_evsel__intval(evsel, sample, "pfn");
786 else
787 page = perf_evsel__intval(evsel, sample, "page");
788
789 nr_page_allocs++;
790 total_page_alloc_bytes += bytes;
791
792 if (!valid_page(page)) {
793 nr_page_fails++;
794 total_page_fail_bytes += bytes;
795
796 return 0;
797 }
798
799 if (parse_gfp_flags(evsel, sample, gfp_flags) < 0)
800 return -1;
801
802 callsite = find_callsite(evsel, sample);
803
804 /*
805 * This is to find the current page (with correct gfp flags and
806 * migrate type) at free event.
807 */
808 this.page = page;
809 pstat = page_stat__findnew_page(&this);
810 if (pstat == NULL)
811 return -ENOMEM;
812
813 pstat->nr_alloc++;
814 pstat->alloc_bytes += bytes;
815 pstat->callsite = callsite;
816
817 if (!live_page) {
818 pstat = page_stat__findnew_alloc(&this);
819 if (pstat == NULL)
820 return -ENOMEM;
821
822 pstat->nr_alloc++;
823 pstat->alloc_bytes += bytes;
824 pstat->callsite = callsite;
825 }
826
827 this.callsite = callsite;
828 pstat = page_stat__findnew_caller(&this);
829 if (pstat == NULL)
830 return -ENOMEM;
831
832 pstat->nr_alloc++;
833 pstat->alloc_bytes += bytes;
834
835 order_stats[order][migrate_type]++;
836
837 return 0;
838}
839
840static int perf_evsel__process_page_free_event(struct perf_evsel *evsel,
841 struct perf_sample *sample)
842{
843 u64 page;
844 unsigned int order = perf_evsel__intval(evsel, sample, "order");
845 u64 bytes = kmem_page_size << order;
846 struct page_stat *pstat;
847 struct page_stat this = {
848 .order = order,
849 };
850
851 if (use_pfn)
852 page = perf_evsel__intval(evsel, sample, "pfn");
853 else
854 page = perf_evsel__intval(evsel, sample, "page");
855
856 nr_page_frees++;
857 total_page_free_bytes += bytes;
858
859 this.page = page;
860 pstat = page_stat__find_page(&this);
861 if (pstat == NULL) {
862 pr_debug2("missing free at page %"PRIx64" (order: %d)\n",
863 page, order);
864
865 nr_page_nomatch++;
866 total_page_nomatch_bytes += bytes;
867
868 return 0;
869 }
870
871 this.gfp_flags = pstat->gfp_flags;
872 this.migrate_type = pstat->migrate_type;
873 this.callsite = pstat->callsite;
874
875 rb_erase(&pstat->node, &page_live_tree);
876 free(pstat);
877
878 if (live_page) {
879 order_stats[this.order][this.migrate_type]--;
880 } else {
881 pstat = page_stat__find_alloc(&this);
882 if (pstat == NULL)
883 return -ENOMEM;
884
885 pstat->nr_free++;
886 pstat->free_bytes += bytes;
887 }
888
889 pstat = page_stat__find_caller(&this);
890 if (pstat == NULL)
891 return -ENOENT;
892
893 pstat->nr_free++;
894 pstat->free_bytes += bytes;
895
896 if (live_page) {
897 pstat->nr_alloc--;
898 pstat->alloc_bytes -= bytes;
899
900 if (pstat->nr_alloc == 0) {
901 rb_erase(&pstat->node, &page_caller_tree);
902 free(pstat);
903 }
904 }
905
906 return 0;
907}
908
909typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
910 struct perf_sample *sample);
911
912static int process_sample_event(struct perf_tool *tool __maybe_unused,
913 union perf_event *event,
914 struct perf_sample *sample,
915 struct perf_evsel *evsel,
916 struct machine *machine)
917{
918 int err = 0;
919 struct thread *thread = machine__findnew_thread(machine, sample->pid,
920 sample->tid);
921
922 if (thread == NULL) {
923 pr_debug("problem processing %d event, skipping it.\n",
924 event->header.type);
925 return -1;
926 }
927
928 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
929
930 if (evsel->handler != NULL) {
931 tracepoint_handler f = evsel->handler;
932 err = f(evsel, sample);
933 }
934
935 thread__put(thread);
936
937 return err;
938}
939
940static struct perf_tool perf_kmem = {
941 .sample = process_sample_event,
942 .comm = perf_event__process_comm,
943 .mmap = perf_event__process_mmap,
944 .mmap2 = perf_event__process_mmap2,
945 .ordered_events = true,
946};
947
948static double fragmentation(unsigned long n_req, unsigned long n_alloc)
949{
950 if (n_alloc == 0)
951 return 0.0;
952 else
953 return 100.0 - (100.0 * n_req / n_alloc);
954}
955
956static void __print_slab_result(struct rb_root *root,
957 struct perf_session *session,
958 int n_lines, int is_caller)
959{
960 struct rb_node *next;
961 struct machine *machine = &session->machines.host;
962
963 printf("%.105s\n", graph_dotted_line);
964 printf(" %-34s |", is_caller ? "Callsite": "Alloc Ptr");
965 printf(" Total_alloc/Per | Total_req/Per | Hit | Ping-pong | Frag\n");
966 printf("%.105s\n", graph_dotted_line);
967
968 next = rb_first(root);
969
970 while (next && n_lines--) {
971 struct alloc_stat *data = rb_entry(next, struct alloc_stat,
972 node);
973 struct symbol *sym = NULL;
974 struct map *map;
975 char buf[BUFSIZ];
976 u64 addr;
977
978 if (is_caller) {
979 addr = data->call_site;
980 if (!raw_ip)
981 sym = machine__find_kernel_function(machine, addr, &map, NULL);
982 } else
983 addr = data->ptr;
984
985 if (sym != NULL)
986 snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
987 addr - map->unmap_ip(map, sym->start));
988 else
989 snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
990 printf(" %-34s |", buf);
991
992 printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %9lu | %6.3f%%\n",
993 (unsigned long long)data->bytes_alloc,
994 (unsigned long)data->bytes_alloc / data->hit,
995 (unsigned long long)data->bytes_req,
996 (unsigned long)data->bytes_req / data->hit,
997 (unsigned long)data->hit,
998 (unsigned long)data->pingpong,
999 fragmentation(data->bytes_req, data->bytes_alloc));
1000
1001 next = rb_next(next);
1002 }
1003
1004 if (n_lines == -1)
1005 printf(" ... | ... | ... | ... | ... | ... \n");
1006
1007 printf("%.105s\n", graph_dotted_line);
1008}
1009
1010static const char * const migrate_type_str[] = {
1011 "UNMOVABL",
1012 "RECLAIM",
1013 "MOVABLE",
1014 "RESERVED",
1015 "CMA/ISLT",
1016 "UNKNOWN",
1017};
1018
1019static void __print_page_alloc_result(struct perf_session *session, int n_lines)
1020{
1021 struct rb_node *next = rb_first(&page_alloc_sorted);
1022 struct machine *machine = &session->machines.host;
1023 const char *format;
1024 int gfp_len = max(strlen("GFP flags"), max_gfp_len);
1025
1026 printf("\n%.105s\n", graph_dotted_line);
1027 printf(" %-16s | %5s alloc (KB) | Hits | Order | Mig.type | %-*s | Callsite\n",
1028 use_pfn ? "PFN" : "Page", live_page ? "Live" : "Total",
1029 gfp_len, "GFP flags");
1030 printf("%.105s\n", graph_dotted_line);
1031
1032 if (use_pfn)
1033 format = " %16llu | %'16llu | %'9d | %5d | %8s | %-*s | %s\n";
1034 else
1035 format = " %016llx | %'16llu | %'9d | %5d | %8s | %-*s | %s\n";
1036
1037 while (next && n_lines--) {
1038 struct page_stat *data;
1039 struct symbol *sym;
1040 struct map *map;
1041 char buf[32];
1042 char *caller = buf;
1043
1044 data = rb_entry(next, struct page_stat, node);
1045 sym = machine__find_kernel_function(machine, data->callsite,
1046 &map, NULL);
1047 if (sym && sym->name)
1048 caller = sym->name;
1049 else
1050 scnprintf(buf, sizeof(buf), "%"PRIx64, data->callsite);
1051
1052 printf(format, (unsigned long long)data->page,
1053 (unsigned long long)data->alloc_bytes / 1024,
1054 data->nr_alloc, data->order,
1055 migrate_type_str[data->migrate_type],
1056 gfp_len, compact_gfp_string(data->gfp_flags), caller);
1057
1058 next = rb_next(next);
1059 }
1060
1061 if (n_lines == -1) {
1062 printf(" ... | ... | ... | ... | ... | %-*s | ...\n",
1063 gfp_len, "...");
1064 }
1065
1066 printf("%.105s\n", graph_dotted_line);
1067}
1068
1069static void __print_page_caller_result(struct perf_session *session, int n_lines)
1070{
1071 struct rb_node *next = rb_first(&page_caller_sorted);
1072 struct machine *machine = &session->machines.host;
1073 int gfp_len = max(strlen("GFP flags"), max_gfp_len);
1074
1075 printf("\n%.105s\n", graph_dotted_line);
1076 printf(" %5s alloc (KB) | Hits | Order | Mig.type | %-*s | Callsite\n",
1077 live_page ? "Live" : "Total", gfp_len, "GFP flags");
1078 printf("%.105s\n", graph_dotted_line);
1079
1080 while (next && n_lines--) {
1081 struct page_stat *data;
1082 struct symbol *sym;
1083 struct map *map;
1084 char buf[32];
1085 char *caller = buf;
1086
1087 data = rb_entry(next, struct page_stat, node);
1088 sym = machine__find_kernel_function(machine, data->callsite,
1089 &map, NULL);
1090 if (sym && sym->name)
1091 caller = sym->name;
1092 else
1093 scnprintf(buf, sizeof(buf), "%"PRIx64, data->callsite);
1094
1095 printf(" %'16llu | %'9d | %5d | %8s | %-*s | %s\n",
1096 (unsigned long long)data->alloc_bytes / 1024,
1097 data->nr_alloc, data->order,
1098 migrate_type_str[data->migrate_type],
1099 gfp_len, compact_gfp_string(data->gfp_flags), caller);
1100
1101 next = rb_next(next);
1102 }
1103
1104 if (n_lines == -1) {
1105 printf(" ... | ... | ... | ... | %-*s | ...\n",
1106 gfp_len, "...");
1107 }
1108
1109 printf("%.105s\n", graph_dotted_line);
1110}
1111
1112static void print_gfp_flags(void)
1113{
1114 int i;
1115
1116 printf("#\n");
1117 printf("# GFP flags\n");
1118 printf("# ---------\n");
1119 for (i = 0; i < nr_gfps; i++) {
1120 printf("# %08x: %*s: %s\n", gfps[i].flags,
1121 (int) max_gfp_len, gfps[i].compact_str,
1122 gfps[i].human_readable);
1123 }
1124}
1125
1126static void print_slab_summary(void)
1127{
1128 printf("\nSUMMARY (SLAB allocator)");
1129 printf("\n========================\n");
1130 printf("Total bytes requested: %'lu\n", total_requested);
1131 printf("Total bytes allocated: %'lu\n", total_allocated);
1132 printf("Total bytes wasted on internal fragmentation: %'lu\n",
1133 total_allocated - total_requested);
1134 printf("Internal fragmentation: %f%%\n",
1135 fragmentation(total_requested, total_allocated));
1136 printf("Cross CPU allocations: %'lu/%'lu\n", nr_cross_allocs, nr_allocs);
1137}
1138
1139static void print_page_summary(void)
1140{
1141 int o, m;
1142 u64 nr_alloc_freed = nr_page_frees - nr_page_nomatch;
1143 u64 total_alloc_freed_bytes = total_page_free_bytes - total_page_nomatch_bytes;
1144
1145 printf("\nSUMMARY (page allocator)");
1146 printf("\n========================\n");
1147 printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total allocation requests",
1148 nr_page_allocs, total_page_alloc_bytes / 1024);
1149 printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total free requests",
1150 nr_page_frees, total_page_free_bytes / 1024);
1151 printf("\n");
1152
1153 printf("%-30s: %'16"PRIu64" [ %'16"PRIu64" KB ]\n", "Total alloc+freed requests",
1154 nr_alloc_freed, (total_alloc_freed_bytes) / 1024);
1155 printf("%-30s: %'16"PRIu64" [ %'16"PRIu64" KB ]\n", "Total alloc-only requests",
1156 nr_page_allocs - nr_alloc_freed,
1157 (total_page_alloc_bytes - total_alloc_freed_bytes) / 1024);
1158 printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total free-only requests",
1159 nr_page_nomatch, total_page_nomatch_bytes / 1024);
1160 printf("\n");
1161
1162 printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total allocation failures",
1163 nr_page_fails, total_page_fail_bytes / 1024);
1164 printf("\n");
1165
1166 printf("%5s %12s %12s %12s %12s %12s\n", "Order", "Unmovable",
1167 "Reclaimable", "Movable", "Reserved", "CMA/Isolated");
1168 printf("%.5s %.12s %.12s %.12s %.12s %.12s\n", graph_dotted_line,
1169 graph_dotted_line, graph_dotted_line, graph_dotted_line,
1170 graph_dotted_line, graph_dotted_line);
1171
1172 for (o = 0; o < MAX_PAGE_ORDER; o++) {
1173 printf("%5d", o);
1174 for (m = 0; m < MAX_MIGRATE_TYPES - 1; m++) {
1175 if (order_stats[o][m])
1176 printf(" %'12d", order_stats[o][m]);
1177 else
1178 printf(" %12c", '.');
1179 }
1180 printf("\n");
1181 }
1182}
1183
1184static void print_slab_result(struct perf_session *session)
1185{
1186 if (caller_flag)
1187 __print_slab_result(&root_caller_sorted, session, caller_lines, 1);
1188 if (alloc_flag)
1189 __print_slab_result(&root_alloc_sorted, session, alloc_lines, 0);
1190 print_slab_summary();
1191}
1192
1193static void print_page_result(struct perf_session *session)
1194{
1195 if (caller_flag || alloc_flag)
1196 print_gfp_flags();
1197 if (caller_flag)
1198 __print_page_caller_result(session, caller_lines);
1199 if (alloc_flag)
1200 __print_page_alloc_result(session, alloc_lines);
1201 print_page_summary();
1202}
1203
1204static void print_result(struct perf_session *session)
1205{
1206 if (kmem_slab)
1207 print_slab_result(session);
1208 if (kmem_page)
1209 print_page_result(session);
1210}
1211
1212static LIST_HEAD(slab_caller_sort);
1213static LIST_HEAD(slab_alloc_sort);
1214static LIST_HEAD(page_caller_sort);
1215static LIST_HEAD(page_alloc_sort);
1216
1217static void sort_slab_insert(struct rb_root *root, struct alloc_stat *data,
1218 struct list_head *sort_list)
1219{
1220 struct rb_node **new = &(root->rb_node);
1221 struct rb_node *parent = NULL;
1222 struct sort_dimension *sort;
1223
1224 while (*new) {
1225 struct alloc_stat *this;
1226 int cmp = 0;
1227
1228 this = rb_entry(*new, struct alloc_stat, node);
1229 parent = *new;
1230
1231 list_for_each_entry(sort, sort_list, list) {
1232 cmp = sort->cmp(data, this);
1233 if (cmp)
1234 break;
1235 }
1236
1237 if (cmp > 0)
1238 new = &((*new)->rb_left);
1239 else
1240 new = &((*new)->rb_right);
1241 }
1242
1243 rb_link_node(&data->node, parent, new);
1244 rb_insert_color(&data->node, root);
1245}
1246
1247static void __sort_slab_result(struct rb_root *root, struct rb_root *root_sorted,
1248 struct list_head *sort_list)
1249{
1250 struct rb_node *node;
1251 struct alloc_stat *data;
1252
1253 for (;;) {
1254 node = rb_first(root);
1255 if (!node)
1256 break;
1257
1258 rb_erase(node, root);
1259 data = rb_entry(node, struct alloc_stat, node);
1260 sort_slab_insert(root_sorted, data, sort_list);
1261 }
1262}
1263
1264static void sort_page_insert(struct rb_root *root, struct page_stat *data,
1265 struct list_head *sort_list)
1266{
1267 struct rb_node **new = &root->rb_node;
1268 struct rb_node *parent = NULL;
1269 struct sort_dimension *sort;
1270
1271 while (*new) {
1272 struct page_stat *this;
1273 int cmp = 0;
1274
1275 this = rb_entry(*new, struct page_stat, node);
1276 parent = *new;
1277
1278 list_for_each_entry(sort, sort_list, list) {
1279 cmp = sort->cmp(data, this);
1280 if (cmp)
1281 break;
1282 }
1283
1284 if (cmp > 0)
1285 new = &parent->rb_left;
1286 else
1287 new = &parent->rb_right;
1288 }
1289
1290 rb_link_node(&data->node, parent, new);
1291 rb_insert_color(&data->node, root);
1292}
1293
1294static void __sort_page_result(struct rb_root *root, struct rb_root *root_sorted,
1295 struct list_head *sort_list)
1296{
1297 struct rb_node *node;
1298 struct page_stat *data;
1299
1300 for (;;) {
1301 node = rb_first(root);
1302 if (!node)
1303 break;
1304
1305 rb_erase(node, root);
1306 data = rb_entry(node, struct page_stat, node);
1307 sort_page_insert(root_sorted, data, sort_list);
1308 }
1309}
1310
1311static void sort_result(void)
1312{
1313 if (kmem_slab) {
1314 __sort_slab_result(&root_alloc_stat, &root_alloc_sorted,
1315 &slab_alloc_sort);
1316 __sort_slab_result(&root_caller_stat, &root_caller_sorted,
1317 &slab_caller_sort);
1318 }
1319 if (kmem_page) {
1320 if (live_page)
1321 __sort_page_result(&page_live_tree, &page_alloc_sorted,
1322 &page_alloc_sort);
1323 else
1324 __sort_page_result(&page_alloc_tree, &page_alloc_sorted,
1325 &page_alloc_sort);
1326
1327 __sort_page_result(&page_caller_tree, &page_caller_sorted,
1328 &page_caller_sort);
1329 }
1330}
1331
1332static int __cmd_kmem(struct perf_session *session)
1333{
1334 int err = -EINVAL;
1335 struct perf_evsel *evsel;
1336 const struct perf_evsel_str_handler kmem_tracepoints[] = {
1337 /* slab allocator */
1338 { "kmem:kmalloc", perf_evsel__process_alloc_event, },
1339 { "kmem:kmem_cache_alloc", perf_evsel__process_alloc_event, },
1340 { "kmem:kmalloc_node", perf_evsel__process_alloc_node_event, },
1341 { "kmem:kmem_cache_alloc_node", perf_evsel__process_alloc_node_event, },
1342 { "kmem:kfree", perf_evsel__process_free_event, },
1343 { "kmem:kmem_cache_free", perf_evsel__process_free_event, },
1344 /* page allocator */
1345 { "kmem:mm_page_alloc", perf_evsel__process_page_alloc_event, },
1346 { "kmem:mm_page_free", perf_evsel__process_page_free_event, },
1347 };
1348
1349 if (!perf_session__has_traces(session, "kmem record"))
1350 goto out;
1351
1352 if (perf_session__set_tracepoints_handlers(session, kmem_tracepoints)) {
1353 pr_err("Initializing perf session tracepoint handlers failed\n");
1354 goto out;
1355 }
1356
1357 evlist__for_each(session->evlist, evsel) {
1358 if (!strcmp(perf_evsel__name(evsel), "kmem:mm_page_alloc") &&
1359 perf_evsel__field(evsel, "pfn")) {
1360 use_pfn = true;
1361 break;
1362 }
1363 }
1364
1365 setup_pager();
1366 err = perf_session__process_events(session);
1367 if (err != 0) {
1368 pr_err("error during process events: %d\n", err);
1369 goto out;
1370 }
1371 sort_result();
1372 print_result(session);
1373out:
1374 return err;
1375}
1376
1377/* slab sort keys */
1378static int ptr_cmp(void *a, void *b)
1379{
1380 struct alloc_stat *l = a;
1381 struct alloc_stat *r = b;
1382
1383 if (l->ptr < r->ptr)
1384 return -1;
1385 else if (l->ptr > r->ptr)
1386 return 1;
1387 return 0;
1388}
1389
1390static struct sort_dimension ptr_sort_dimension = {
1391 .name = "ptr",
1392 .cmp = ptr_cmp,
1393};
1394
1395static int slab_callsite_cmp(void *a, void *b)
1396{
1397 struct alloc_stat *l = a;
1398 struct alloc_stat *r = b;
1399
1400 if (l->call_site < r->call_site)
1401 return -1;
1402 else if (l->call_site > r->call_site)
1403 return 1;
1404 return 0;
1405}
1406
1407static struct sort_dimension callsite_sort_dimension = {
1408 .name = "callsite",
1409 .cmp = slab_callsite_cmp,
1410};
1411
1412static int hit_cmp(void *a, void *b)
1413{
1414 struct alloc_stat *l = a;
1415 struct alloc_stat *r = b;
1416
1417 if (l->hit < r->hit)
1418 return -1;
1419 else if (l->hit > r->hit)
1420 return 1;
1421 return 0;
1422}
1423
1424static struct sort_dimension hit_sort_dimension = {
1425 .name = "hit",
1426 .cmp = hit_cmp,
1427};
1428
1429static int bytes_cmp(void *a, void *b)
1430{
1431 struct alloc_stat *l = a;
1432 struct alloc_stat *r = b;
1433
1434 if (l->bytes_alloc < r->bytes_alloc)
1435 return -1;
1436 else if (l->bytes_alloc > r->bytes_alloc)
1437 return 1;
1438 return 0;
1439}
1440
1441static struct sort_dimension bytes_sort_dimension = {
1442 .name = "bytes",
1443 .cmp = bytes_cmp,
1444};
1445
1446static int frag_cmp(void *a, void *b)
1447{
1448 double x, y;
1449 struct alloc_stat *l = a;
1450 struct alloc_stat *r = b;
1451
1452 x = fragmentation(l->bytes_req, l->bytes_alloc);
1453 y = fragmentation(r->bytes_req, r->bytes_alloc);
1454
1455 if (x < y)
1456 return -1;
1457 else if (x > y)
1458 return 1;
1459 return 0;
1460}
1461
1462static struct sort_dimension frag_sort_dimension = {
1463 .name = "frag",
1464 .cmp = frag_cmp,
1465};
1466
1467static int pingpong_cmp(void *a, void *b)
1468{
1469 struct alloc_stat *l = a;
1470 struct alloc_stat *r = b;
1471
1472 if (l->pingpong < r->pingpong)
1473 return -1;
1474 else if (l->pingpong > r->pingpong)
1475 return 1;
1476 return 0;
1477}
1478
1479static struct sort_dimension pingpong_sort_dimension = {
1480 .name = "pingpong",
1481 .cmp = pingpong_cmp,
1482};
1483
1484/* page sort keys */
1485static int page_cmp(void *a, void *b)
1486{
1487 struct page_stat *l = a;
1488 struct page_stat *r = b;
1489
1490 if (l->page < r->page)
1491 return -1;
1492 else if (l->page > r->page)
1493 return 1;
1494 return 0;
1495}
1496
1497static struct sort_dimension page_sort_dimension = {
1498 .name = "page",
1499 .cmp = page_cmp,
1500};
1501
1502static int page_callsite_cmp(void *a, void *b)
1503{
1504 struct page_stat *l = a;
1505 struct page_stat *r = b;
1506
1507 if (l->callsite < r->callsite)
1508 return -1;
1509 else if (l->callsite > r->callsite)
1510 return 1;
1511 return 0;
1512}
1513
1514static struct sort_dimension page_callsite_sort_dimension = {
1515 .name = "callsite",
1516 .cmp = page_callsite_cmp,
1517};
1518
1519static int page_hit_cmp(void *a, void *b)
1520{
1521 struct page_stat *l = a;
1522 struct page_stat *r = b;
1523
1524 if (l->nr_alloc < r->nr_alloc)
1525 return -1;
1526 else if (l->nr_alloc > r->nr_alloc)
1527 return 1;
1528 return 0;
1529}
1530
1531static struct sort_dimension page_hit_sort_dimension = {
1532 .name = "hit",
1533 .cmp = page_hit_cmp,
1534};
1535
1536static int page_bytes_cmp(void *a, void *b)
1537{
1538 struct page_stat *l = a;
1539 struct page_stat *r = b;
1540
1541 if (l->alloc_bytes < r->alloc_bytes)
1542 return -1;
1543 else if (l->alloc_bytes > r->alloc_bytes)
1544 return 1;
1545 return 0;
1546}
1547
1548static struct sort_dimension page_bytes_sort_dimension = {
1549 .name = "bytes",
1550 .cmp = page_bytes_cmp,
1551};
1552
1553static int page_order_cmp(void *a, void *b)
1554{
1555 struct page_stat *l = a;
1556 struct page_stat *r = b;
1557
1558 if (l->order < r->order)
1559 return -1;
1560 else if (l->order > r->order)
1561 return 1;
1562 return 0;
1563}
1564
1565static struct sort_dimension page_order_sort_dimension = {
1566 .name = "order",
1567 .cmp = page_order_cmp,
1568};
1569
1570static int migrate_type_cmp(void *a, void *b)
1571{
1572 struct page_stat *l = a;
1573 struct page_stat *r = b;
1574
1575 /* for internal use to find free'd page */
1576 if (l->migrate_type == -1U)
1577 return 0;
1578
1579 if (l->migrate_type < r->migrate_type)
1580 return -1;
1581 else if (l->migrate_type > r->migrate_type)
1582 return 1;
1583 return 0;
1584}
1585
1586static struct sort_dimension migrate_type_sort_dimension = {
1587 .name = "migtype",
1588 .cmp = migrate_type_cmp,
1589};
1590
1591static int gfp_flags_cmp(void *a, void *b)
1592{
1593 struct page_stat *l = a;
1594 struct page_stat *r = b;
1595
1596 /* for internal use to find free'd page */
1597 if (l->gfp_flags == -1U)
1598 return 0;
1599
1600 if (l->gfp_flags < r->gfp_flags)
1601 return -1;
1602 else if (l->gfp_flags > r->gfp_flags)
1603 return 1;
1604 return 0;
1605}
1606
1607static struct sort_dimension gfp_flags_sort_dimension = {
1608 .name = "gfp",
1609 .cmp = gfp_flags_cmp,
1610};
1611
1612static struct sort_dimension *slab_sorts[] = {
1613 &ptr_sort_dimension,
1614 &callsite_sort_dimension,
1615 &hit_sort_dimension,
1616 &bytes_sort_dimension,
1617 &frag_sort_dimension,
1618 &pingpong_sort_dimension,
1619};
1620
1621static struct sort_dimension *page_sorts[] = {
1622 &page_sort_dimension,
1623 &page_callsite_sort_dimension,
1624 &page_hit_sort_dimension,
1625 &page_bytes_sort_dimension,
1626 &page_order_sort_dimension,
1627 &migrate_type_sort_dimension,
1628 &gfp_flags_sort_dimension,
1629};
1630
1631static int slab_sort_dimension__add(const char *tok, struct list_head *list)
1632{
1633 struct sort_dimension *sort;
1634 int i;
1635
1636 for (i = 0; i < (int)ARRAY_SIZE(slab_sorts); i++) {
1637 if (!strcmp(slab_sorts[i]->name, tok)) {
1638 sort = memdup(slab_sorts[i], sizeof(*slab_sorts[i]));
1639 if (!sort) {
1640 pr_err("%s: memdup failed\n", __func__);
1641 return -1;
1642 }
1643 list_add_tail(&sort->list, list);
1644 return 0;
1645 }
1646 }
1647
1648 return -1;
1649}
1650
1651static int page_sort_dimension__add(const char *tok, struct list_head *list)
1652{
1653 struct sort_dimension *sort;
1654 int i;
1655
1656 for (i = 0; i < (int)ARRAY_SIZE(page_sorts); i++) {
1657 if (!strcmp(page_sorts[i]->name, tok)) {
1658 sort = memdup(page_sorts[i], sizeof(*page_sorts[i]));
1659 if (!sort) {
1660 pr_err("%s: memdup failed\n", __func__);
1661 return -1;
1662 }
1663 list_add_tail(&sort->list, list);
1664 return 0;
1665 }
1666 }
1667
1668 return -1;
1669}
1670
1671static int setup_slab_sorting(struct list_head *sort_list, const char *arg)
1672{
1673 char *tok;
1674 char *str = strdup(arg);
1675 char *pos = str;
1676
1677 if (!str) {
1678 pr_err("%s: strdup failed\n", __func__);
1679 return -1;
1680 }
1681
1682 while (true) {
1683 tok = strsep(&pos, ",");
1684 if (!tok)
1685 break;
1686 if (slab_sort_dimension__add(tok, sort_list) < 0) {
1687 error("Unknown slab --sort key: '%s'", tok);
1688 free(str);
1689 return -1;
1690 }
1691 }
1692
1693 free(str);
1694 return 0;
1695}
1696
1697static int setup_page_sorting(struct list_head *sort_list, const char *arg)
1698{
1699 char *tok;
1700 char *str = strdup(arg);
1701 char *pos = str;
1702
1703 if (!str) {
1704 pr_err("%s: strdup failed\n", __func__);
1705 return -1;
1706 }
1707
1708 while (true) {
1709 tok = strsep(&pos, ",");
1710 if (!tok)
1711 break;
1712 if (page_sort_dimension__add(tok, sort_list) < 0) {
1713 error("Unknown page --sort key: '%s'", tok);
1714 free(str);
1715 return -1;
1716 }
1717 }
1718
1719 free(str);
1720 return 0;
1721}
1722
1723static int parse_sort_opt(const struct option *opt __maybe_unused,
1724 const char *arg, int unset __maybe_unused)
1725{
1726 if (!arg)
1727 return -1;
1728
1729 if (kmem_page > kmem_slab ||
1730 (kmem_page == 0 && kmem_slab == 0 && kmem_default == KMEM_PAGE)) {
1731 if (caller_flag > alloc_flag)
1732 return setup_page_sorting(&page_caller_sort, arg);
1733 else
1734 return setup_page_sorting(&page_alloc_sort, arg);
1735 } else {
1736 if (caller_flag > alloc_flag)
1737 return setup_slab_sorting(&slab_caller_sort, arg);
1738 else
1739 return setup_slab_sorting(&slab_alloc_sort, arg);
1740 }
1741
1742 return 0;
1743}
1744
1745static int parse_caller_opt(const struct option *opt __maybe_unused,
1746 const char *arg __maybe_unused,
1747 int unset __maybe_unused)
1748{
1749 caller_flag = (alloc_flag + 1);
1750 return 0;
1751}
1752
1753static int parse_alloc_opt(const struct option *opt __maybe_unused,
1754 const char *arg __maybe_unused,
1755 int unset __maybe_unused)
1756{
1757 alloc_flag = (caller_flag + 1);
1758 return 0;
1759}
1760
1761static int parse_slab_opt(const struct option *opt __maybe_unused,
1762 const char *arg __maybe_unused,
1763 int unset __maybe_unused)
1764{
1765 kmem_slab = (kmem_page + 1);
1766 return 0;
1767}
1768
1769static int parse_page_opt(const struct option *opt __maybe_unused,
1770 const char *arg __maybe_unused,
1771 int unset __maybe_unused)
1772{
1773 kmem_page = (kmem_slab + 1);
1774 return 0;
1775}
1776
1777static int parse_line_opt(const struct option *opt __maybe_unused,
1778 const char *arg, int unset __maybe_unused)
1779{
1780 int lines;
1781
1782 if (!arg)
1783 return -1;
1784
1785 lines = strtoul(arg, NULL, 10);
1786
1787 if (caller_flag > alloc_flag)
1788 caller_lines = lines;
1789 else
1790 alloc_lines = lines;
1791
1792 return 0;
1793}
1794
1795static int __cmd_record(int argc, const char **argv)
1796{
1797 const char * const record_args[] = {
1798 "record", "-a", "-R", "-c", "1",
1799 };
1800 const char * const slab_events[] = {
1801 "-e", "kmem:kmalloc",
1802 "-e", "kmem:kmalloc_node",
1803 "-e", "kmem:kfree",
1804 "-e", "kmem:kmem_cache_alloc",
1805 "-e", "kmem:kmem_cache_alloc_node",
1806 "-e", "kmem:kmem_cache_free",
1807 };
1808 const char * const page_events[] = {
1809 "-e", "kmem:mm_page_alloc",
1810 "-e", "kmem:mm_page_free",
1811 };
1812 unsigned int rec_argc, i, j;
1813 const char **rec_argv;
1814
1815 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
1816 if (kmem_slab)
1817 rec_argc += ARRAY_SIZE(slab_events);
1818 if (kmem_page)
1819 rec_argc += ARRAY_SIZE(page_events) + 1; /* for -g */
1820
1821 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1822
1823 if (rec_argv == NULL)
1824 return -ENOMEM;
1825
1826 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1827 rec_argv[i] = strdup(record_args[i]);
1828
1829 if (kmem_slab) {
1830 for (j = 0; j < ARRAY_SIZE(slab_events); j++, i++)
1831 rec_argv[i] = strdup(slab_events[j]);
1832 }
1833 if (kmem_page) {
1834 rec_argv[i++] = strdup("-g");
1835
1836 for (j = 0; j < ARRAY_SIZE(page_events); j++, i++)
1837 rec_argv[i] = strdup(page_events[j]);
1838 }
1839
1840 for (j = 1; j < (unsigned int)argc; j++, i++)
1841 rec_argv[i] = argv[j];
1842
1843 return cmd_record(i, rec_argv, NULL);
1844}
1845
1846static int kmem_config(const char *var, const char *value, void *cb __maybe_unused)
1847{
1848 if (!strcmp(var, "kmem.default")) {
1849 if (!strcmp(value, "slab"))
1850 kmem_default = KMEM_SLAB;
1851 else if (!strcmp(value, "page"))
1852 kmem_default = KMEM_PAGE;
1853 else
1854 pr_err("invalid default value ('slab' or 'page' required): %s\n",
1855 value);
1856 return 0;
1857 }
1858
1859 return 0;
1860}
1861
1862int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
1863{
1864 const char * const default_slab_sort = "frag,hit,bytes";
1865 const char * const default_page_sort = "bytes,hit";
1866 struct perf_data_file file = {
1867 .mode = PERF_DATA_MODE_READ,
1868 };
1869 const struct option kmem_options[] = {
1870 OPT_STRING('i', "input", &input_name, "file", "input file name"),
1871 OPT_INCR('v', "verbose", &verbose,
1872 "be more verbose (show symbol address, etc)"),
1873 OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
1874 "show per-callsite statistics", parse_caller_opt),
1875 OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
1876 "show per-allocation statistics", parse_alloc_opt),
1877 OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
1878 "sort by keys: ptr, callsite, bytes, hit, pingpong, frag, "
1879 "page, order, migtype, gfp", parse_sort_opt),
1880 OPT_CALLBACK('l', "line", NULL, "num", "show n lines", parse_line_opt),
1881 OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
1882 OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
1883 OPT_CALLBACK_NOOPT(0, "slab", NULL, NULL, "Analyze slab allocator",
1884 parse_slab_opt),
1885 OPT_CALLBACK_NOOPT(0, "page", NULL, NULL, "Analyze page allocator",
1886 parse_page_opt),
1887 OPT_BOOLEAN(0, "live", &live_page, "Show live page stat"),
1888 OPT_END()
1889 };
1890 const char *const kmem_subcommands[] = { "record", "stat", NULL };
1891 const char *kmem_usage[] = {
1892 NULL,
1893 NULL
1894 };
1895 struct perf_session *session;
1896 int ret = -1;
1897 const char errmsg[] = "No %s allocation events found. Have you run 'perf kmem record --%s'?\n";
1898
1899 perf_config(kmem_config, NULL);
1900 argc = parse_options_subcommand(argc, argv, kmem_options,
1901 kmem_subcommands, kmem_usage, 0);
1902
1903 if (!argc)
1904 usage_with_options(kmem_usage, kmem_options);
1905
1906 if (kmem_slab == 0 && kmem_page == 0) {
1907 if (kmem_default == KMEM_SLAB)
1908 kmem_slab = 1;
1909 else
1910 kmem_page = 1;
1911 }
1912
1913 if (!strncmp(argv[0], "rec", 3)) {
1914 symbol__init(NULL);
1915 return __cmd_record(argc, argv);
1916 }
1917
1918 file.path = input_name;
1919
1920 kmem_session = session = perf_session__new(&file, false, &perf_kmem);
1921 if (session == NULL)
1922 return -1;
1923
1924 if (kmem_slab) {
1925 if (!perf_evlist__find_tracepoint_by_name(session->evlist,
1926 "kmem:kmalloc")) {
1927 pr_err(errmsg, "slab", "slab");
1928 goto out_delete;
1929 }
1930 }
1931
1932 if (kmem_page) {
1933 struct perf_evsel *evsel;
1934
1935 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
1936 "kmem:mm_page_alloc");
1937 if (evsel == NULL) {
1938 pr_err(errmsg, "page", "page");
1939 goto out_delete;
1940 }
1941
1942 kmem_page_size = pevent_get_page_size(evsel->tp_format->pevent);
1943 symbol_conf.use_callchain = true;
1944 }
1945
1946 symbol__init(&session->header.env);
1947
1948 if (!strcmp(argv[0], "stat")) {
1949 setlocale(LC_ALL, "");
1950
1951 if (cpu__setup_cpunode_map())
1952 goto out_delete;
1953
1954 if (list_empty(&slab_caller_sort))
1955 setup_slab_sorting(&slab_caller_sort, default_slab_sort);
1956 if (list_empty(&slab_alloc_sort))
1957 setup_slab_sorting(&slab_alloc_sort, default_slab_sort);
1958 if (list_empty(&page_caller_sort))
1959 setup_page_sorting(&page_caller_sort, default_page_sort);
1960 if (list_empty(&page_alloc_sort))
1961 setup_page_sorting(&page_alloc_sort, default_page_sort);
1962
1963 if (kmem_page) {
1964 setup_page_sorting(&page_alloc_sort_input,
1965 "page,order,migtype,gfp");
1966 setup_page_sorting(&page_caller_sort_input,
1967 "callsite,order,migtype,gfp");
1968 }
1969 ret = __cmd_kmem(session);
1970 } else
1971 usage_with_options(kmem_usage, kmem_options);
1972
1973out_delete:
1974 perf_session__delete(session);
1975
1976 return ret;
1977}
1978
1// SPDX-License-Identifier: GPL-2.0
2#include "builtin.h"
3#include "perf.h"
4
5#include "util/dso.h"
6#include "util/evlist.h"
7#include "util/evsel.h"
8#include "util/config.h"
9#include "util/map.h"
10#include "util/symbol.h"
11#include "util/thread.h"
12#include "util/header.h"
13#include "util/session.h"
14#include "util/tool.h"
15#include "util/callchain.h"
16#include "util/time-utils.h"
17#include <linux/err.h>
18
19#include <subcmd/pager.h>
20#include <subcmd/parse-options.h>
21#include "util/trace-event.h"
22#include "util/data.h"
23#include "util/cpumap.h"
24
25#include "util/debug.h"
26#include "util/string2.h"
27
28#include <linux/kernel.h>
29#include <linux/rbtree.h>
30#include <linux/string.h>
31#include <linux/zalloc.h>
32#include <errno.h>
33#include <inttypes.h>
34#include <locale.h>
35#include <regex.h>
36
37#include <linux/ctype.h>
38
39static int kmem_slab;
40static int kmem_page;
41
42static long kmem_page_size;
43static enum {
44 KMEM_SLAB,
45 KMEM_PAGE,
46} kmem_default = KMEM_SLAB; /* for backward compatibility */
47
48struct alloc_stat;
49typedef int (*sort_fn_t)(void *, void *);
50
51static int alloc_flag;
52static int caller_flag;
53
54static int alloc_lines = -1;
55static int caller_lines = -1;
56
57static bool raw_ip;
58
59struct alloc_stat {
60 u64 call_site;
61 u64 ptr;
62 u64 bytes_req;
63 u64 bytes_alloc;
64 u64 last_alloc;
65 u32 hit;
66 u32 pingpong;
67
68 short alloc_cpu;
69
70 struct rb_node node;
71};
72
73static struct rb_root root_alloc_stat;
74static struct rb_root root_alloc_sorted;
75static struct rb_root root_caller_stat;
76static struct rb_root root_caller_sorted;
77
78static unsigned long total_requested, total_allocated, total_freed;
79static unsigned long nr_allocs, nr_cross_allocs;
80
81/* filters for controlling start and stop of time of analysis */
82static struct perf_time_interval ptime;
83const char *time_str;
84
85static int insert_alloc_stat(unsigned long call_site, unsigned long ptr,
86 int bytes_req, int bytes_alloc, int cpu)
87{
88 struct rb_node **node = &root_alloc_stat.rb_node;
89 struct rb_node *parent = NULL;
90 struct alloc_stat *data = NULL;
91
92 while (*node) {
93 parent = *node;
94 data = rb_entry(*node, struct alloc_stat, node);
95
96 if (ptr > data->ptr)
97 node = &(*node)->rb_right;
98 else if (ptr < data->ptr)
99 node = &(*node)->rb_left;
100 else
101 break;
102 }
103
104 if (data && data->ptr == ptr) {
105 data->hit++;
106 data->bytes_req += bytes_req;
107 data->bytes_alloc += bytes_alloc;
108 } else {
109 data = malloc(sizeof(*data));
110 if (!data) {
111 pr_err("%s: malloc failed\n", __func__);
112 return -1;
113 }
114 data->ptr = ptr;
115 data->pingpong = 0;
116 data->hit = 1;
117 data->bytes_req = bytes_req;
118 data->bytes_alloc = bytes_alloc;
119
120 rb_link_node(&data->node, parent, node);
121 rb_insert_color(&data->node, &root_alloc_stat);
122 }
123 data->call_site = call_site;
124 data->alloc_cpu = cpu;
125 data->last_alloc = bytes_alloc;
126
127 return 0;
128}
129
130static int insert_caller_stat(unsigned long call_site,
131 int bytes_req, int bytes_alloc)
132{
133 struct rb_node **node = &root_caller_stat.rb_node;
134 struct rb_node *parent = NULL;
135 struct alloc_stat *data = NULL;
136
137 while (*node) {
138 parent = *node;
139 data = rb_entry(*node, struct alloc_stat, node);
140
141 if (call_site > data->call_site)
142 node = &(*node)->rb_right;
143 else if (call_site < data->call_site)
144 node = &(*node)->rb_left;
145 else
146 break;
147 }
148
149 if (data && data->call_site == call_site) {
150 data->hit++;
151 data->bytes_req += bytes_req;
152 data->bytes_alloc += bytes_alloc;
153 } else {
154 data = malloc(sizeof(*data));
155 if (!data) {
156 pr_err("%s: malloc failed\n", __func__);
157 return -1;
158 }
159 data->call_site = call_site;
160 data->pingpong = 0;
161 data->hit = 1;
162 data->bytes_req = bytes_req;
163 data->bytes_alloc = bytes_alloc;
164
165 rb_link_node(&data->node, parent, node);
166 rb_insert_color(&data->node, &root_caller_stat);
167 }
168
169 return 0;
170}
171
172static int evsel__process_alloc_event(struct evsel *evsel, struct perf_sample *sample)
173{
174 unsigned long ptr = evsel__intval(evsel, sample, "ptr"),
175 call_site = evsel__intval(evsel, sample, "call_site");
176 int bytes_req = evsel__intval(evsel, sample, "bytes_req"),
177 bytes_alloc = evsel__intval(evsel, sample, "bytes_alloc");
178
179 if (insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, sample->cpu) ||
180 insert_caller_stat(call_site, bytes_req, bytes_alloc))
181 return -1;
182
183 total_requested += bytes_req;
184 total_allocated += bytes_alloc;
185
186 nr_allocs++;
187 return 0;
188}
189
190static int evsel__process_alloc_node_event(struct evsel *evsel, struct perf_sample *sample)
191{
192 int ret = evsel__process_alloc_event(evsel, sample);
193
194 if (!ret) {
195 int node1 = cpu__get_node(sample->cpu),
196 node2 = evsel__intval(evsel, sample, "node");
197
198 if (node1 != node2)
199 nr_cross_allocs++;
200 }
201
202 return ret;
203}
204
205static int ptr_cmp(void *, void *);
206static int slab_callsite_cmp(void *, void *);
207
208static struct alloc_stat *search_alloc_stat(unsigned long ptr,
209 unsigned long call_site,
210 struct rb_root *root,
211 sort_fn_t sort_fn)
212{
213 struct rb_node *node = root->rb_node;
214 struct alloc_stat key = { .ptr = ptr, .call_site = call_site };
215
216 while (node) {
217 struct alloc_stat *data;
218 int cmp;
219
220 data = rb_entry(node, struct alloc_stat, node);
221
222 cmp = sort_fn(&key, data);
223 if (cmp < 0)
224 node = node->rb_left;
225 else if (cmp > 0)
226 node = node->rb_right;
227 else
228 return data;
229 }
230 return NULL;
231}
232
233static int evsel__process_free_event(struct evsel *evsel, struct perf_sample *sample)
234{
235 unsigned long ptr = evsel__intval(evsel, sample, "ptr");
236 struct alloc_stat *s_alloc, *s_caller;
237
238 s_alloc = search_alloc_stat(ptr, 0, &root_alloc_stat, ptr_cmp);
239 if (!s_alloc)
240 return 0;
241
242 total_freed += s_alloc->last_alloc;
243
244 if ((short)sample->cpu != s_alloc->alloc_cpu) {
245 s_alloc->pingpong++;
246
247 s_caller = search_alloc_stat(0, s_alloc->call_site,
248 &root_caller_stat,
249 slab_callsite_cmp);
250 if (!s_caller)
251 return -1;
252 s_caller->pingpong++;
253 }
254 s_alloc->alloc_cpu = -1;
255
256 return 0;
257}
258
259static u64 total_page_alloc_bytes;
260static u64 total_page_free_bytes;
261static u64 total_page_nomatch_bytes;
262static u64 total_page_fail_bytes;
263static unsigned long nr_page_allocs;
264static unsigned long nr_page_frees;
265static unsigned long nr_page_fails;
266static unsigned long nr_page_nomatch;
267
268static bool use_pfn;
269static bool live_page;
270static struct perf_session *kmem_session;
271
272#define MAX_MIGRATE_TYPES 6
273#define MAX_PAGE_ORDER 11
274
275static int order_stats[MAX_PAGE_ORDER][MAX_MIGRATE_TYPES];
276
277struct page_stat {
278 struct rb_node node;
279 u64 page;
280 u64 callsite;
281 int order;
282 unsigned gfp_flags;
283 unsigned migrate_type;
284 u64 alloc_bytes;
285 u64 free_bytes;
286 int nr_alloc;
287 int nr_free;
288};
289
290static struct rb_root page_live_tree;
291static struct rb_root page_alloc_tree;
292static struct rb_root page_alloc_sorted;
293static struct rb_root page_caller_tree;
294static struct rb_root page_caller_sorted;
295
296struct alloc_func {
297 u64 start;
298 u64 end;
299 char *name;
300};
301
302static int nr_alloc_funcs;
303static struct alloc_func *alloc_func_list;
304
305static int funcmp(const void *a, const void *b)
306{
307 const struct alloc_func *fa = a;
308 const struct alloc_func *fb = b;
309
310 if (fa->start > fb->start)
311 return 1;
312 else
313 return -1;
314}
315
316static int callcmp(const void *a, const void *b)
317{
318 const struct alloc_func *fa = a;
319 const struct alloc_func *fb = b;
320
321 if (fb->start <= fa->start && fa->end < fb->end)
322 return 0;
323
324 if (fa->start > fb->start)
325 return 1;
326 else
327 return -1;
328}
329
330static int build_alloc_func_list(void)
331{
332 int ret;
333 struct map *kernel_map;
334 struct symbol *sym;
335 struct rb_node *node;
336 struct alloc_func *func;
337 struct machine *machine = &kmem_session->machines.host;
338 regex_t alloc_func_regex;
339 static const char pattern[] = "^_?_?(alloc|get_free|get_zeroed)_pages?";
340
341 ret = regcomp(&alloc_func_regex, pattern, REG_EXTENDED);
342 if (ret) {
343 char err[BUFSIZ];
344
345 regerror(ret, &alloc_func_regex, err, sizeof(err));
346 pr_err("Invalid regex: %s\n%s", pattern, err);
347 return -EINVAL;
348 }
349
350 kernel_map = machine__kernel_map(machine);
351 if (map__load(kernel_map) < 0) {
352 pr_err("cannot load kernel map\n");
353 return -ENOENT;
354 }
355
356 map__for_each_symbol(kernel_map, sym, node) {
357 if (regexec(&alloc_func_regex, sym->name, 0, NULL, 0))
358 continue;
359
360 func = realloc(alloc_func_list,
361 (nr_alloc_funcs + 1) * sizeof(*func));
362 if (func == NULL)
363 return -ENOMEM;
364
365 pr_debug("alloc func: %s\n", sym->name);
366 func[nr_alloc_funcs].start = sym->start;
367 func[nr_alloc_funcs].end = sym->end;
368 func[nr_alloc_funcs].name = sym->name;
369
370 alloc_func_list = func;
371 nr_alloc_funcs++;
372 }
373
374 qsort(alloc_func_list, nr_alloc_funcs, sizeof(*func), funcmp);
375
376 regfree(&alloc_func_regex);
377 return 0;
378}
379
380/*
381 * Find first non-memory allocation function from callchain.
382 * The allocation functions are in the 'alloc_func_list'.
383 */
384static u64 find_callsite(struct evsel *evsel, struct perf_sample *sample)
385{
386 struct addr_location al;
387 struct machine *machine = &kmem_session->machines.host;
388 struct callchain_cursor_node *node;
389
390 if (alloc_func_list == NULL) {
391 if (build_alloc_func_list() < 0)
392 goto out;
393 }
394
395 al.thread = machine__findnew_thread(machine, sample->pid, sample->tid);
396 sample__resolve_callchain(sample, &callchain_cursor, NULL, evsel, &al, 16);
397
398 callchain_cursor_commit(&callchain_cursor);
399 while (true) {
400 struct alloc_func key, *caller;
401 u64 addr;
402
403 node = callchain_cursor_current(&callchain_cursor);
404 if (node == NULL)
405 break;
406
407 key.start = key.end = node->ip;
408 caller = bsearch(&key, alloc_func_list, nr_alloc_funcs,
409 sizeof(key), callcmp);
410 if (!caller) {
411 /* found */
412 if (node->ms.map)
413 addr = map__unmap_ip(node->ms.map, node->ip);
414 else
415 addr = node->ip;
416
417 return addr;
418 } else
419 pr_debug3("skipping alloc function: %s\n", caller->name);
420
421 callchain_cursor_advance(&callchain_cursor);
422 }
423
424out:
425 pr_debug2("unknown callsite: %"PRIx64 "\n", sample->ip);
426 return sample->ip;
427}
428
429struct sort_dimension {
430 const char name[20];
431 sort_fn_t cmp;
432 struct list_head list;
433};
434
435static LIST_HEAD(page_alloc_sort_input);
436static LIST_HEAD(page_caller_sort_input);
437
438static struct page_stat *
439__page_stat__findnew_page(struct page_stat *pstat, bool create)
440{
441 struct rb_node **node = &page_live_tree.rb_node;
442 struct rb_node *parent = NULL;
443 struct page_stat *data;
444
445 while (*node) {
446 s64 cmp;
447
448 parent = *node;
449 data = rb_entry(*node, struct page_stat, node);
450
451 cmp = data->page - pstat->page;
452 if (cmp < 0)
453 node = &parent->rb_left;
454 else if (cmp > 0)
455 node = &parent->rb_right;
456 else
457 return data;
458 }
459
460 if (!create)
461 return NULL;
462
463 data = zalloc(sizeof(*data));
464 if (data != NULL) {
465 data->page = pstat->page;
466 data->order = pstat->order;
467 data->gfp_flags = pstat->gfp_flags;
468 data->migrate_type = pstat->migrate_type;
469
470 rb_link_node(&data->node, parent, node);
471 rb_insert_color(&data->node, &page_live_tree);
472 }
473
474 return data;
475}
476
477static struct page_stat *page_stat__find_page(struct page_stat *pstat)
478{
479 return __page_stat__findnew_page(pstat, false);
480}
481
482static struct page_stat *page_stat__findnew_page(struct page_stat *pstat)
483{
484 return __page_stat__findnew_page(pstat, true);
485}
486
487static struct page_stat *
488__page_stat__findnew_alloc(struct page_stat *pstat, bool create)
489{
490 struct rb_node **node = &page_alloc_tree.rb_node;
491 struct rb_node *parent = NULL;
492 struct page_stat *data;
493 struct sort_dimension *sort;
494
495 while (*node) {
496 int cmp = 0;
497
498 parent = *node;
499 data = rb_entry(*node, struct page_stat, node);
500
501 list_for_each_entry(sort, &page_alloc_sort_input, list) {
502 cmp = sort->cmp(pstat, data);
503 if (cmp)
504 break;
505 }
506
507 if (cmp < 0)
508 node = &parent->rb_left;
509 else if (cmp > 0)
510 node = &parent->rb_right;
511 else
512 return data;
513 }
514
515 if (!create)
516 return NULL;
517
518 data = zalloc(sizeof(*data));
519 if (data != NULL) {
520 data->page = pstat->page;
521 data->order = pstat->order;
522 data->gfp_flags = pstat->gfp_flags;
523 data->migrate_type = pstat->migrate_type;
524
525 rb_link_node(&data->node, parent, node);
526 rb_insert_color(&data->node, &page_alloc_tree);
527 }
528
529 return data;
530}
531
532static struct page_stat *page_stat__find_alloc(struct page_stat *pstat)
533{
534 return __page_stat__findnew_alloc(pstat, false);
535}
536
537static struct page_stat *page_stat__findnew_alloc(struct page_stat *pstat)
538{
539 return __page_stat__findnew_alloc(pstat, true);
540}
541
542static struct page_stat *
543__page_stat__findnew_caller(struct page_stat *pstat, bool create)
544{
545 struct rb_node **node = &page_caller_tree.rb_node;
546 struct rb_node *parent = NULL;
547 struct page_stat *data;
548 struct sort_dimension *sort;
549
550 while (*node) {
551 int cmp = 0;
552
553 parent = *node;
554 data = rb_entry(*node, struct page_stat, node);
555
556 list_for_each_entry(sort, &page_caller_sort_input, list) {
557 cmp = sort->cmp(pstat, data);
558 if (cmp)
559 break;
560 }
561
562 if (cmp < 0)
563 node = &parent->rb_left;
564 else if (cmp > 0)
565 node = &parent->rb_right;
566 else
567 return data;
568 }
569
570 if (!create)
571 return NULL;
572
573 data = zalloc(sizeof(*data));
574 if (data != NULL) {
575 data->callsite = pstat->callsite;
576 data->order = pstat->order;
577 data->gfp_flags = pstat->gfp_flags;
578 data->migrate_type = pstat->migrate_type;
579
580 rb_link_node(&data->node, parent, node);
581 rb_insert_color(&data->node, &page_caller_tree);
582 }
583
584 return data;
585}
586
587static struct page_stat *page_stat__find_caller(struct page_stat *pstat)
588{
589 return __page_stat__findnew_caller(pstat, false);
590}
591
592static struct page_stat *page_stat__findnew_caller(struct page_stat *pstat)
593{
594 return __page_stat__findnew_caller(pstat, true);
595}
596
597static bool valid_page(u64 pfn_or_page)
598{
599 if (use_pfn && pfn_or_page == -1UL)
600 return false;
601 if (!use_pfn && pfn_or_page == 0)
602 return false;
603 return true;
604}
605
606struct gfp_flag {
607 unsigned int flags;
608 char *compact_str;
609 char *human_readable;
610};
611
612static struct gfp_flag *gfps;
613static int nr_gfps;
614
615static int gfpcmp(const void *a, const void *b)
616{
617 const struct gfp_flag *fa = a;
618 const struct gfp_flag *fb = b;
619
620 return fa->flags - fb->flags;
621}
622
623/* see include/trace/events/mmflags.h */
624static const struct {
625 const char *original;
626 const char *compact;
627} gfp_compact_table[] = {
628 { "GFP_TRANSHUGE", "THP" },
629 { "GFP_TRANSHUGE_LIGHT", "THL" },
630 { "GFP_HIGHUSER_MOVABLE", "HUM" },
631 { "GFP_HIGHUSER", "HU" },
632 { "GFP_USER", "U" },
633 { "GFP_KERNEL_ACCOUNT", "KAC" },
634 { "GFP_KERNEL", "K" },
635 { "GFP_NOFS", "NF" },
636 { "GFP_ATOMIC", "A" },
637 { "GFP_NOIO", "NI" },
638 { "GFP_NOWAIT", "NW" },
639 { "GFP_DMA", "D" },
640 { "__GFP_HIGHMEM", "HM" },
641 { "GFP_DMA32", "D32" },
642 { "__GFP_HIGH", "H" },
643 { "__GFP_ATOMIC", "_A" },
644 { "__GFP_IO", "I" },
645 { "__GFP_FS", "F" },
646 { "__GFP_NOWARN", "NWR" },
647 { "__GFP_RETRY_MAYFAIL", "R" },
648 { "__GFP_NOFAIL", "NF" },
649 { "__GFP_NORETRY", "NR" },
650 { "__GFP_COMP", "C" },
651 { "__GFP_ZERO", "Z" },
652 { "__GFP_NOMEMALLOC", "NMA" },
653 { "__GFP_MEMALLOC", "MA" },
654 { "__GFP_HARDWALL", "HW" },
655 { "__GFP_THISNODE", "TN" },
656 { "__GFP_RECLAIMABLE", "RC" },
657 { "__GFP_MOVABLE", "M" },
658 { "__GFP_ACCOUNT", "AC" },
659 { "__GFP_WRITE", "WR" },
660 { "__GFP_RECLAIM", "R" },
661 { "__GFP_DIRECT_RECLAIM", "DR" },
662 { "__GFP_KSWAPD_RECLAIM", "KR" },
663};
664
665static size_t max_gfp_len;
666
667static char *compact_gfp_flags(char *gfp_flags)
668{
669 char *orig_flags = strdup(gfp_flags);
670 char *new_flags = NULL;
671 char *str, *pos = NULL;
672 size_t len = 0;
673
674 if (orig_flags == NULL)
675 return NULL;
676
677 str = strtok_r(orig_flags, "|", &pos);
678 while (str) {
679 size_t i;
680 char *new;
681 const char *cpt;
682
683 for (i = 0; i < ARRAY_SIZE(gfp_compact_table); i++) {
684 if (strcmp(gfp_compact_table[i].original, str))
685 continue;
686
687 cpt = gfp_compact_table[i].compact;
688 new = realloc(new_flags, len + strlen(cpt) + 2);
689 if (new == NULL) {
690 free(new_flags);
691 free(orig_flags);
692 return NULL;
693 }
694
695 new_flags = new;
696
697 if (!len) {
698 strcpy(new_flags, cpt);
699 } else {
700 strcat(new_flags, "|");
701 strcat(new_flags, cpt);
702 len++;
703 }
704
705 len += strlen(cpt);
706 }
707
708 str = strtok_r(NULL, "|", &pos);
709 }
710
711 if (max_gfp_len < len)
712 max_gfp_len = len;
713
714 free(orig_flags);
715 return new_flags;
716}
717
718static char *compact_gfp_string(unsigned long gfp_flags)
719{
720 struct gfp_flag key = {
721 .flags = gfp_flags,
722 };
723 struct gfp_flag *gfp;
724
725 gfp = bsearch(&key, gfps, nr_gfps, sizeof(*gfps), gfpcmp);
726 if (gfp)
727 return gfp->compact_str;
728
729 return NULL;
730}
731
732static int parse_gfp_flags(struct evsel *evsel, struct perf_sample *sample,
733 unsigned int gfp_flags)
734{
735 struct tep_record record = {
736 .cpu = sample->cpu,
737 .data = sample->raw_data,
738 .size = sample->raw_size,
739 };
740 struct trace_seq seq;
741 char *str, *pos = NULL;
742
743 if (nr_gfps) {
744 struct gfp_flag key = {
745 .flags = gfp_flags,
746 };
747
748 if (bsearch(&key, gfps, nr_gfps, sizeof(*gfps), gfpcmp))
749 return 0;
750 }
751
752 trace_seq_init(&seq);
753 tep_print_event(evsel->tp_format->tep,
754 &seq, &record, "%s", TEP_PRINT_INFO);
755
756 str = strtok_r(seq.buffer, " ", &pos);
757 while (str) {
758 if (!strncmp(str, "gfp_flags=", 10)) {
759 struct gfp_flag *new;
760
761 new = realloc(gfps, (nr_gfps + 1) * sizeof(*gfps));
762 if (new == NULL)
763 return -ENOMEM;
764
765 gfps = new;
766 new += nr_gfps++;
767
768 new->flags = gfp_flags;
769 new->human_readable = strdup(str + 10);
770 new->compact_str = compact_gfp_flags(str + 10);
771 if (!new->human_readable || !new->compact_str)
772 return -ENOMEM;
773
774 qsort(gfps, nr_gfps, sizeof(*gfps), gfpcmp);
775 }
776
777 str = strtok_r(NULL, " ", &pos);
778 }
779
780 trace_seq_destroy(&seq);
781 return 0;
782}
783
784static int evsel__process_page_alloc_event(struct evsel *evsel, struct perf_sample *sample)
785{
786 u64 page;
787 unsigned int order = evsel__intval(evsel, sample, "order");
788 unsigned int gfp_flags = evsel__intval(evsel, sample, "gfp_flags");
789 unsigned int migrate_type = evsel__intval(evsel, sample,
790 "migratetype");
791 u64 bytes = kmem_page_size << order;
792 u64 callsite;
793 struct page_stat *pstat;
794 struct page_stat this = {
795 .order = order,
796 .gfp_flags = gfp_flags,
797 .migrate_type = migrate_type,
798 };
799
800 if (use_pfn)
801 page = evsel__intval(evsel, sample, "pfn");
802 else
803 page = evsel__intval(evsel, sample, "page");
804
805 nr_page_allocs++;
806 total_page_alloc_bytes += bytes;
807
808 if (!valid_page(page)) {
809 nr_page_fails++;
810 total_page_fail_bytes += bytes;
811
812 return 0;
813 }
814
815 if (parse_gfp_flags(evsel, sample, gfp_flags) < 0)
816 return -1;
817
818 callsite = find_callsite(evsel, sample);
819
820 /*
821 * This is to find the current page (with correct gfp flags and
822 * migrate type) at free event.
823 */
824 this.page = page;
825 pstat = page_stat__findnew_page(&this);
826 if (pstat == NULL)
827 return -ENOMEM;
828
829 pstat->nr_alloc++;
830 pstat->alloc_bytes += bytes;
831 pstat->callsite = callsite;
832
833 if (!live_page) {
834 pstat = page_stat__findnew_alloc(&this);
835 if (pstat == NULL)
836 return -ENOMEM;
837
838 pstat->nr_alloc++;
839 pstat->alloc_bytes += bytes;
840 pstat->callsite = callsite;
841 }
842
843 this.callsite = callsite;
844 pstat = page_stat__findnew_caller(&this);
845 if (pstat == NULL)
846 return -ENOMEM;
847
848 pstat->nr_alloc++;
849 pstat->alloc_bytes += bytes;
850
851 order_stats[order][migrate_type]++;
852
853 return 0;
854}
855
856static int evsel__process_page_free_event(struct evsel *evsel, struct perf_sample *sample)
857{
858 u64 page;
859 unsigned int order = evsel__intval(evsel, sample, "order");
860 u64 bytes = kmem_page_size << order;
861 struct page_stat *pstat;
862 struct page_stat this = {
863 .order = order,
864 };
865
866 if (use_pfn)
867 page = evsel__intval(evsel, sample, "pfn");
868 else
869 page = evsel__intval(evsel, sample, "page");
870
871 nr_page_frees++;
872 total_page_free_bytes += bytes;
873
874 this.page = page;
875 pstat = page_stat__find_page(&this);
876 if (pstat == NULL) {
877 pr_debug2("missing free at page %"PRIx64" (order: %d)\n",
878 page, order);
879
880 nr_page_nomatch++;
881 total_page_nomatch_bytes += bytes;
882
883 return 0;
884 }
885
886 this.gfp_flags = pstat->gfp_flags;
887 this.migrate_type = pstat->migrate_type;
888 this.callsite = pstat->callsite;
889
890 rb_erase(&pstat->node, &page_live_tree);
891 free(pstat);
892
893 if (live_page) {
894 order_stats[this.order][this.migrate_type]--;
895 } else {
896 pstat = page_stat__find_alloc(&this);
897 if (pstat == NULL)
898 return -ENOMEM;
899
900 pstat->nr_free++;
901 pstat->free_bytes += bytes;
902 }
903
904 pstat = page_stat__find_caller(&this);
905 if (pstat == NULL)
906 return -ENOENT;
907
908 pstat->nr_free++;
909 pstat->free_bytes += bytes;
910
911 if (live_page) {
912 pstat->nr_alloc--;
913 pstat->alloc_bytes -= bytes;
914
915 if (pstat->nr_alloc == 0) {
916 rb_erase(&pstat->node, &page_caller_tree);
917 free(pstat);
918 }
919 }
920
921 return 0;
922}
923
924static bool perf_kmem__skip_sample(struct perf_sample *sample)
925{
926 /* skip sample based on time? */
927 if (perf_time__skip_sample(&ptime, sample->time))
928 return true;
929
930 return false;
931}
932
933typedef int (*tracepoint_handler)(struct evsel *evsel,
934 struct perf_sample *sample);
935
936static int process_sample_event(struct perf_tool *tool __maybe_unused,
937 union perf_event *event,
938 struct perf_sample *sample,
939 struct evsel *evsel,
940 struct machine *machine)
941{
942 int err = 0;
943 struct thread *thread = machine__findnew_thread(machine, sample->pid,
944 sample->tid);
945
946 if (thread == NULL) {
947 pr_debug("problem processing %d event, skipping it.\n",
948 event->header.type);
949 return -1;
950 }
951
952 if (perf_kmem__skip_sample(sample))
953 return 0;
954
955 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
956
957 if (evsel->handler != NULL) {
958 tracepoint_handler f = evsel->handler;
959 err = f(evsel, sample);
960 }
961
962 thread__put(thread);
963
964 return err;
965}
966
967static struct perf_tool perf_kmem = {
968 .sample = process_sample_event,
969 .comm = perf_event__process_comm,
970 .mmap = perf_event__process_mmap,
971 .mmap2 = perf_event__process_mmap2,
972 .namespaces = perf_event__process_namespaces,
973 .ordered_events = true,
974};
975
976static double fragmentation(unsigned long n_req, unsigned long n_alloc)
977{
978 if (n_alloc == 0)
979 return 0.0;
980 else
981 return 100.0 - (100.0 * n_req / n_alloc);
982}
983
984static void __print_slab_result(struct rb_root *root,
985 struct perf_session *session,
986 int n_lines, int is_caller)
987{
988 struct rb_node *next;
989 struct machine *machine = &session->machines.host;
990
991 printf("%.105s\n", graph_dotted_line);
992 printf(" %-34s |", is_caller ? "Callsite": "Alloc Ptr");
993 printf(" Total_alloc/Per | Total_req/Per | Hit | Ping-pong | Frag\n");
994 printf("%.105s\n", graph_dotted_line);
995
996 next = rb_first(root);
997
998 while (next && n_lines--) {
999 struct alloc_stat *data = rb_entry(next, struct alloc_stat,
1000 node);
1001 struct symbol *sym = NULL;
1002 struct map *map;
1003 char buf[BUFSIZ];
1004 u64 addr;
1005
1006 if (is_caller) {
1007 addr = data->call_site;
1008 if (!raw_ip)
1009 sym = machine__find_kernel_symbol(machine, addr, &map);
1010 } else
1011 addr = data->ptr;
1012
1013 if (sym != NULL)
1014 snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
1015 addr - map->unmap_ip(map, sym->start));
1016 else
1017 snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
1018 printf(" %-34s |", buf);
1019
1020 printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %9lu | %6.3f%%\n",
1021 (unsigned long long)data->bytes_alloc,
1022 (unsigned long)data->bytes_alloc / data->hit,
1023 (unsigned long long)data->bytes_req,
1024 (unsigned long)data->bytes_req / data->hit,
1025 (unsigned long)data->hit,
1026 (unsigned long)data->pingpong,
1027 fragmentation(data->bytes_req, data->bytes_alloc));
1028
1029 next = rb_next(next);
1030 }
1031
1032 if (n_lines == -1)
1033 printf(" ... | ... | ... | ... | ... | ... \n");
1034
1035 printf("%.105s\n", graph_dotted_line);
1036}
1037
1038static const char * const migrate_type_str[] = {
1039 "UNMOVABL",
1040 "RECLAIM",
1041 "MOVABLE",
1042 "RESERVED",
1043 "CMA/ISLT",
1044 "UNKNOWN",
1045};
1046
1047static void __print_page_alloc_result(struct perf_session *session, int n_lines)
1048{
1049 struct rb_node *next = rb_first(&page_alloc_sorted);
1050 struct machine *machine = &session->machines.host;
1051 const char *format;
1052 int gfp_len = max(strlen("GFP flags"), max_gfp_len);
1053
1054 printf("\n%.105s\n", graph_dotted_line);
1055 printf(" %-16s | %5s alloc (KB) | Hits | Order | Mig.type | %-*s | Callsite\n",
1056 use_pfn ? "PFN" : "Page", live_page ? "Live" : "Total",
1057 gfp_len, "GFP flags");
1058 printf("%.105s\n", graph_dotted_line);
1059
1060 if (use_pfn)
1061 format = " %16llu | %'16llu | %'9d | %5d | %8s | %-*s | %s\n";
1062 else
1063 format = " %016llx | %'16llu | %'9d | %5d | %8s | %-*s | %s\n";
1064
1065 while (next && n_lines--) {
1066 struct page_stat *data;
1067 struct symbol *sym;
1068 struct map *map;
1069 char buf[32];
1070 char *caller = buf;
1071
1072 data = rb_entry(next, struct page_stat, node);
1073 sym = machine__find_kernel_symbol(machine, data->callsite, &map);
1074 if (sym)
1075 caller = sym->name;
1076 else
1077 scnprintf(buf, sizeof(buf), "%"PRIx64, data->callsite);
1078
1079 printf(format, (unsigned long long)data->page,
1080 (unsigned long long)data->alloc_bytes / 1024,
1081 data->nr_alloc, data->order,
1082 migrate_type_str[data->migrate_type],
1083 gfp_len, compact_gfp_string(data->gfp_flags), caller);
1084
1085 next = rb_next(next);
1086 }
1087
1088 if (n_lines == -1) {
1089 printf(" ... | ... | ... | ... | ... | %-*s | ...\n",
1090 gfp_len, "...");
1091 }
1092
1093 printf("%.105s\n", graph_dotted_line);
1094}
1095
1096static void __print_page_caller_result(struct perf_session *session, int n_lines)
1097{
1098 struct rb_node *next = rb_first(&page_caller_sorted);
1099 struct machine *machine = &session->machines.host;
1100 int gfp_len = max(strlen("GFP flags"), max_gfp_len);
1101
1102 printf("\n%.105s\n", graph_dotted_line);
1103 printf(" %5s alloc (KB) | Hits | Order | Mig.type | %-*s | Callsite\n",
1104 live_page ? "Live" : "Total", gfp_len, "GFP flags");
1105 printf("%.105s\n", graph_dotted_line);
1106
1107 while (next && n_lines--) {
1108 struct page_stat *data;
1109 struct symbol *sym;
1110 struct map *map;
1111 char buf[32];
1112 char *caller = buf;
1113
1114 data = rb_entry(next, struct page_stat, node);
1115 sym = machine__find_kernel_symbol(machine, data->callsite, &map);
1116 if (sym)
1117 caller = sym->name;
1118 else
1119 scnprintf(buf, sizeof(buf), "%"PRIx64, data->callsite);
1120
1121 printf(" %'16llu | %'9d | %5d | %8s | %-*s | %s\n",
1122 (unsigned long long)data->alloc_bytes / 1024,
1123 data->nr_alloc, data->order,
1124 migrate_type_str[data->migrate_type],
1125 gfp_len, compact_gfp_string(data->gfp_flags), caller);
1126
1127 next = rb_next(next);
1128 }
1129
1130 if (n_lines == -1) {
1131 printf(" ... | ... | ... | ... | %-*s | ...\n",
1132 gfp_len, "...");
1133 }
1134
1135 printf("%.105s\n", graph_dotted_line);
1136}
1137
1138static void print_gfp_flags(void)
1139{
1140 int i;
1141
1142 printf("#\n");
1143 printf("# GFP flags\n");
1144 printf("# ---------\n");
1145 for (i = 0; i < nr_gfps; i++) {
1146 printf("# %08x: %*s: %s\n", gfps[i].flags,
1147 (int) max_gfp_len, gfps[i].compact_str,
1148 gfps[i].human_readable);
1149 }
1150}
1151
1152static void print_slab_summary(void)
1153{
1154 printf("\nSUMMARY (SLAB allocator)");
1155 printf("\n========================\n");
1156 printf("Total bytes requested: %'lu\n", total_requested);
1157 printf("Total bytes allocated: %'lu\n", total_allocated);
1158 printf("Total bytes freed: %'lu\n", total_freed);
1159 if (total_allocated > total_freed) {
1160 printf("Net total bytes allocated: %'lu\n",
1161 total_allocated - total_freed);
1162 }
1163 printf("Total bytes wasted on internal fragmentation: %'lu\n",
1164 total_allocated - total_requested);
1165 printf("Internal fragmentation: %f%%\n",
1166 fragmentation(total_requested, total_allocated));
1167 printf("Cross CPU allocations: %'lu/%'lu\n", nr_cross_allocs, nr_allocs);
1168}
1169
1170static void print_page_summary(void)
1171{
1172 int o, m;
1173 u64 nr_alloc_freed = nr_page_frees - nr_page_nomatch;
1174 u64 total_alloc_freed_bytes = total_page_free_bytes - total_page_nomatch_bytes;
1175
1176 printf("\nSUMMARY (page allocator)");
1177 printf("\n========================\n");
1178 printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total allocation requests",
1179 nr_page_allocs, total_page_alloc_bytes / 1024);
1180 printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total free requests",
1181 nr_page_frees, total_page_free_bytes / 1024);
1182 printf("\n");
1183
1184 printf("%-30s: %'16"PRIu64" [ %'16"PRIu64" KB ]\n", "Total alloc+freed requests",
1185 nr_alloc_freed, (total_alloc_freed_bytes) / 1024);
1186 printf("%-30s: %'16"PRIu64" [ %'16"PRIu64" KB ]\n", "Total alloc-only requests",
1187 nr_page_allocs - nr_alloc_freed,
1188 (total_page_alloc_bytes - total_alloc_freed_bytes) / 1024);
1189 printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total free-only requests",
1190 nr_page_nomatch, total_page_nomatch_bytes / 1024);
1191 printf("\n");
1192
1193 printf("%-30s: %'16lu [ %'16"PRIu64" KB ]\n", "Total allocation failures",
1194 nr_page_fails, total_page_fail_bytes / 1024);
1195 printf("\n");
1196
1197 printf("%5s %12s %12s %12s %12s %12s\n", "Order", "Unmovable",
1198 "Reclaimable", "Movable", "Reserved", "CMA/Isolated");
1199 printf("%.5s %.12s %.12s %.12s %.12s %.12s\n", graph_dotted_line,
1200 graph_dotted_line, graph_dotted_line, graph_dotted_line,
1201 graph_dotted_line, graph_dotted_line);
1202
1203 for (o = 0; o < MAX_PAGE_ORDER; o++) {
1204 printf("%5d", o);
1205 for (m = 0; m < MAX_MIGRATE_TYPES - 1; m++) {
1206 if (order_stats[o][m])
1207 printf(" %'12d", order_stats[o][m]);
1208 else
1209 printf(" %12c", '.');
1210 }
1211 printf("\n");
1212 }
1213}
1214
1215static void print_slab_result(struct perf_session *session)
1216{
1217 if (caller_flag)
1218 __print_slab_result(&root_caller_sorted, session, caller_lines, 1);
1219 if (alloc_flag)
1220 __print_slab_result(&root_alloc_sorted, session, alloc_lines, 0);
1221 print_slab_summary();
1222}
1223
1224static void print_page_result(struct perf_session *session)
1225{
1226 if (caller_flag || alloc_flag)
1227 print_gfp_flags();
1228 if (caller_flag)
1229 __print_page_caller_result(session, caller_lines);
1230 if (alloc_flag)
1231 __print_page_alloc_result(session, alloc_lines);
1232 print_page_summary();
1233}
1234
1235static void print_result(struct perf_session *session)
1236{
1237 if (kmem_slab)
1238 print_slab_result(session);
1239 if (kmem_page)
1240 print_page_result(session);
1241}
1242
1243static LIST_HEAD(slab_caller_sort);
1244static LIST_HEAD(slab_alloc_sort);
1245static LIST_HEAD(page_caller_sort);
1246static LIST_HEAD(page_alloc_sort);
1247
1248static void sort_slab_insert(struct rb_root *root, struct alloc_stat *data,
1249 struct list_head *sort_list)
1250{
1251 struct rb_node **new = &(root->rb_node);
1252 struct rb_node *parent = NULL;
1253 struct sort_dimension *sort;
1254
1255 while (*new) {
1256 struct alloc_stat *this;
1257 int cmp = 0;
1258
1259 this = rb_entry(*new, struct alloc_stat, node);
1260 parent = *new;
1261
1262 list_for_each_entry(sort, sort_list, list) {
1263 cmp = sort->cmp(data, this);
1264 if (cmp)
1265 break;
1266 }
1267
1268 if (cmp > 0)
1269 new = &((*new)->rb_left);
1270 else
1271 new = &((*new)->rb_right);
1272 }
1273
1274 rb_link_node(&data->node, parent, new);
1275 rb_insert_color(&data->node, root);
1276}
1277
1278static void __sort_slab_result(struct rb_root *root, struct rb_root *root_sorted,
1279 struct list_head *sort_list)
1280{
1281 struct rb_node *node;
1282 struct alloc_stat *data;
1283
1284 for (;;) {
1285 node = rb_first(root);
1286 if (!node)
1287 break;
1288
1289 rb_erase(node, root);
1290 data = rb_entry(node, struct alloc_stat, node);
1291 sort_slab_insert(root_sorted, data, sort_list);
1292 }
1293}
1294
1295static void sort_page_insert(struct rb_root *root, struct page_stat *data,
1296 struct list_head *sort_list)
1297{
1298 struct rb_node **new = &root->rb_node;
1299 struct rb_node *parent = NULL;
1300 struct sort_dimension *sort;
1301
1302 while (*new) {
1303 struct page_stat *this;
1304 int cmp = 0;
1305
1306 this = rb_entry(*new, struct page_stat, node);
1307 parent = *new;
1308
1309 list_for_each_entry(sort, sort_list, list) {
1310 cmp = sort->cmp(data, this);
1311 if (cmp)
1312 break;
1313 }
1314
1315 if (cmp > 0)
1316 new = &parent->rb_left;
1317 else
1318 new = &parent->rb_right;
1319 }
1320
1321 rb_link_node(&data->node, parent, new);
1322 rb_insert_color(&data->node, root);
1323}
1324
1325static void __sort_page_result(struct rb_root *root, struct rb_root *root_sorted,
1326 struct list_head *sort_list)
1327{
1328 struct rb_node *node;
1329 struct page_stat *data;
1330
1331 for (;;) {
1332 node = rb_first(root);
1333 if (!node)
1334 break;
1335
1336 rb_erase(node, root);
1337 data = rb_entry(node, struct page_stat, node);
1338 sort_page_insert(root_sorted, data, sort_list);
1339 }
1340}
1341
1342static void sort_result(void)
1343{
1344 if (kmem_slab) {
1345 __sort_slab_result(&root_alloc_stat, &root_alloc_sorted,
1346 &slab_alloc_sort);
1347 __sort_slab_result(&root_caller_stat, &root_caller_sorted,
1348 &slab_caller_sort);
1349 }
1350 if (kmem_page) {
1351 if (live_page)
1352 __sort_page_result(&page_live_tree, &page_alloc_sorted,
1353 &page_alloc_sort);
1354 else
1355 __sort_page_result(&page_alloc_tree, &page_alloc_sorted,
1356 &page_alloc_sort);
1357
1358 __sort_page_result(&page_caller_tree, &page_caller_sorted,
1359 &page_caller_sort);
1360 }
1361}
1362
1363static int __cmd_kmem(struct perf_session *session)
1364{
1365 int err = -EINVAL;
1366 struct evsel *evsel;
1367 const struct evsel_str_handler kmem_tracepoints[] = {
1368 /* slab allocator */
1369 { "kmem:kmalloc", evsel__process_alloc_event, },
1370 { "kmem:kmem_cache_alloc", evsel__process_alloc_event, },
1371 { "kmem:kmalloc_node", evsel__process_alloc_node_event, },
1372 { "kmem:kmem_cache_alloc_node", evsel__process_alloc_node_event, },
1373 { "kmem:kfree", evsel__process_free_event, },
1374 { "kmem:kmem_cache_free", evsel__process_free_event, },
1375 /* page allocator */
1376 { "kmem:mm_page_alloc", evsel__process_page_alloc_event, },
1377 { "kmem:mm_page_free", evsel__process_page_free_event, },
1378 };
1379
1380 if (!perf_session__has_traces(session, "kmem record"))
1381 goto out;
1382
1383 if (perf_session__set_tracepoints_handlers(session, kmem_tracepoints)) {
1384 pr_err("Initializing perf session tracepoint handlers failed\n");
1385 goto out;
1386 }
1387
1388 evlist__for_each_entry(session->evlist, evsel) {
1389 if (!strcmp(evsel__name(evsel), "kmem:mm_page_alloc") &&
1390 evsel__field(evsel, "pfn")) {
1391 use_pfn = true;
1392 break;
1393 }
1394 }
1395
1396 setup_pager();
1397 err = perf_session__process_events(session);
1398 if (err != 0) {
1399 pr_err("error during process events: %d\n", err);
1400 goto out;
1401 }
1402 sort_result();
1403 print_result(session);
1404out:
1405 return err;
1406}
1407
1408/* slab sort keys */
1409static int ptr_cmp(void *a, void *b)
1410{
1411 struct alloc_stat *l = a;
1412 struct alloc_stat *r = b;
1413
1414 if (l->ptr < r->ptr)
1415 return -1;
1416 else if (l->ptr > r->ptr)
1417 return 1;
1418 return 0;
1419}
1420
1421static struct sort_dimension ptr_sort_dimension = {
1422 .name = "ptr",
1423 .cmp = ptr_cmp,
1424};
1425
1426static int slab_callsite_cmp(void *a, void *b)
1427{
1428 struct alloc_stat *l = a;
1429 struct alloc_stat *r = b;
1430
1431 if (l->call_site < r->call_site)
1432 return -1;
1433 else if (l->call_site > r->call_site)
1434 return 1;
1435 return 0;
1436}
1437
1438static struct sort_dimension callsite_sort_dimension = {
1439 .name = "callsite",
1440 .cmp = slab_callsite_cmp,
1441};
1442
1443static int hit_cmp(void *a, void *b)
1444{
1445 struct alloc_stat *l = a;
1446 struct alloc_stat *r = b;
1447
1448 if (l->hit < r->hit)
1449 return -1;
1450 else if (l->hit > r->hit)
1451 return 1;
1452 return 0;
1453}
1454
1455static struct sort_dimension hit_sort_dimension = {
1456 .name = "hit",
1457 .cmp = hit_cmp,
1458};
1459
1460static int bytes_cmp(void *a, void *b)
1461{
1462 struct alloc_stat *l = a;
1463 struct alloc_stat *r = b;
1464
1465 if (l->bytes_alloc < r->bytes_alloc)
1466 return -1;
1467 else if (l->bytes_alloc > r->bytes_alloc)
1468 return 1;
1469 return 0;
1470}
1471
1472static struct sort_dimension bytes_sort_dimension = {
1473 .name = "bytes",
1474 .cmp = bytes_cmp,
1475};
1476
1477static int frag_cmp(void *a, void *b)
1478{
1479 double x, y;
1480 struct alloc_stat *l = a;
1481 struct alloc_stat *r = b;
1482
1483 x = fragmentation(l->bytes_req, l->bytes_alloc);
1484 y = fragmentation(r->bytes_req, r->bytes_alloc);
1485
1486 if (x < y)
1487 return -1;
1488 else if (x > y)
1489 return 1;
1490 return 0;
1491}
1492
1493static struct sort_dimension frag_sort_dimension = {
1494 .name = "frag",
1495 .cmp = frag_cmp,
1496};
1497
1498static int pingpong_cmp(void *a, void *b)
1499{
1500 struct alloc_stat *l = a;
1501 struct alloc_stat *r = b;
1502
1503 if (l->pingpong < r->pingpong)
1504 return -1;
1505 else if (l->pingpong > r->pingpong)
1506 return 1;
1507 return 0;
1508}
1509
1510static struct sort_dimension pingpong_sort_dimension = {
1511 .name = "pingpong",
1512 .cmp = pingpong_cmp,
1513};
1514
1515/* page sort keys */
1516static int page_cmp(void *a, void *b)
1517{
1518 struct page_stat *l = a;
1519 struct page_stat *r = b;
1520
1521 if (l->page < r->page)
1522 return -1;
1523 else if (l->page > r->page)
1524 return 1;
1525 return 0;
1526}
1527
1528static struct sort_dimension page_sort_dimension = {
1529 .name = "page",
1530 .cmp = page_cmp,
1531};
1532
1533static int page_callsite_cmp(void *a, void *b)
1534{
1535 struct page_stat *l = a;
1536 struct page_stat *r = b;
1537
1538 if (l->callsite < r->callsite)
1539 return -1;
1540 else if (l->callsite > r->callsite)
1541 return 1;
1542 return 0;
1543}
1544
1545static struct sort_dimension page_callsite_sort_dimension = {
1546 .name = "callsite",
1547 .cmp = page_callsite_cmp,
1548};
1549
1550static int page_hit_cmp(void *a, void *b)
1551{
1552 struct page_stat *l = a;
1553 struct page_stat *r = b;
1554
1555 if (l->nr_alloc < r->nr_alloc)
1556 return -1;
1557 else if (l->nr_alloc > r->nr_alloc)
1558 return 1;
1559 return 0;
1560}
1561
1562static struct sort_dimension page_hit_sort_dimension = {
1563 .name = "hit",
1564 .cmp = page_hit_cmp,
1565};
1566
1567static int page_bytes_cmp(void *a, void *b)
1568{
1569 struct page_stat *l = a;
1570 struct page_stat *r = b;
1571
1572 if (l->alloc_bytes < r->alloc_bytes)
1573 return -1;
1574 else if (l->alloc_bytes > r->alloc_bytes)
1575 return 1;
1576 return 0;
1577}
1578
1579static struct sort_dimension page_bytes_sort_dimension = {
1580 .name = "bytes",
1581 .cmp = page_bytes_cmp,
1582};
1583
1584static int page_order_cmp(void *a, void *b)
1585{
1586 struct page_stat *l = a;
1587 struct page_stat *r = b;
1588
1589 if (l->order < r->order)
1590 return -1;
1591 else if (l->order > r->order)
1592 return 1;
1593 return 0;
1594}
1595
1596static struct sort_dimension page_order_sort_dimension = {
1597 .name = "order",
1598 .cmp = page_order_cmp,
1599};
1600
1601static int migrate_type_cmp(void *a, void *b)
1602{
1603 struct page_stat *l = a;
1604 struct page_stat *r = b;
1605
1606 /* for internal use to find free'd page */
1607 if (l->migrate_type == -1U)
1608 return 0;
1609
1610 if (l->migrate_type < r->migrate_type)
1611 return -1;
1612 else if (l->migrate_type > r->migrate_type)
1613 return 1;
1614 return 0;
1615}
1616
1617static struct sort_dimension migrate_type_sort_dimension = {
1618 .name = "migtype",
1619 .cmp = migrate_type_cmp,
1620};
1621
1622static int gfp_flags_cmp(void *a, void *b)
1623{
1624 struct page_stat *l = a;
1625 struct page_stat *r = b;
1626
1627 /* for internal use to find free'd page */
1628 if (l->gfp_flags == -1U)
1629 return 0;
1630
1631 if (l->gfp_flags < r->gfp_flags)
1632 return -1;
1633 else if (l->gfp_flags > r->gfp_flags)
1634 return 1;
1635 return 0;
1636}
1637
1638static struct sort_dimension gfp_flags_sort_dimension = {
1639 .name = "gfp",
1640 .cmp = gfp_flags_cmp,
1641};
1642
1643static struct sort_dimension *slab_sorts[] = {
1644 &ptr_sort_dimension,
1645 &callsite_sort_dimension,
1646 &hit_sort_dimension,
1647 &bytes_sort_dimension,
1648 &frag_sort_dimension,
1649 &pingpong_sort_dimension,
1650};
1651
1652static struct sort_dimension *page_sorts[] = {
1653 &page_sort_dimension,
1654 &page_callsite_sort_dimension,
1655 &page_hit_sort_dimension,
1656 &page_bytes_sort_dimension,
1657 &page_order_sort_dimension,
1658 &migrate_type_sort_dimension,
1659 &gfp_flags_sort_dimension,
1660};
1661
1662static int slab_sort_dimension__add(const char *tok, struct list_head *list)
1663{
1664 struct sort_dimension *sort;
1665 int i;
1666
1667 for (i = 0; i < (int)ARRAY_SIZE(slab_sorts); i++) {
1668 if (!strcmp(slab_sorts[i]->name, tok)) {
1669 sort = memdup(slab_sorts[i], sizeof(*slab_sorts[i]));
1670 if (!sort) {
1671 pr_err("%s: memdup failed\n", __func__);
1672 return -1;
1673 }
1674 list_add_tail(&sort->list, list);
1675 return 0;
1676 }
1677 }
1678
1679 return -1;
1680}
1681
1682static int page_sort_dimension__add(const char *tok, struct list_head *list)
1683{
1684 struct sort_dimension *sort;
1685 int i;
1686
1687 for (i = 0; i < (int)ARRAY_SIZE(page_sorts); i++) {
1688 if (!strcmp(page_sorts[i]->name, tok)) {
1689 sort = memdup(page_sorts[i], sizeof(*page_sorts[i]));
1690 if (!sort) {
1691 pr_err("%s: memdup failed\n", __func__);
1692 return -1;
1693 }
1694 list_add_tail(&sort->list, list);
1695 return 0;
1696 }
1697 }
1698
1699 return -1;
1700}
1701
1702static int setup_slab_sorting(struct list_head *sort_list, const char *arg)
1703{
1704 char *tok;
1705 char *str = strdup(arg);
1706 char *pos = str;
1707
1708 if (!str) {
1709 pr_err("%s: strdup failed\n", __func__);
1710 return -1;
1711 }
1712
1713 while (true) {
1714 tok = strsep(&pos, ",");
1715 if (!tok)
1716 break;
1717 if (slab_sort_dimension__add(tok, sort_list) < 0) {
1718 pr_err("Unknown slab --sort key: '%s'", tok);
1719 free(str);
1720 return -1;
1721 }
1722 }
1723
1724 free(str);
1725 return 0;
1726}
1727
1728static int setup_page_sorting(struct list_head *sort_list, const char *arg)
1729{
1730 char *tok;
1731 char *str = strdup(arg);
1732 char *pos = str;
1733
1734 if (!str) {
1735 pr_err("%s: strdup failed\n", __func__);
1736 return -1;
1737 }
1738
1739 while (true) {
1740 tok = strsep(&pos, ",");
1741 if (!tok)
1742 break;
1743 if (page_sort_dimension__add(tok, sort_list) < 0) {
1744 pr_err("Unknown page --sort key: '%s'", tok);
1745 free(str);
1746 return -1;
1747 }
1748 }
1749
1750 free(str);
1751 return 0;
1752}
1753
1754static int parse_sort_opt(const struct option *opt __maybe_unused,
1755 const char *arg, int unset __maybe_unused)
1756{
1757 if (!arg)
1758 return -1;
1759
1760 if (kmem_page > kmem_slab ||
1761 (kmem_page == 0 && kmem_slab == 0 && kmem_default == KMEM_PAGE)) {
1762 if (caller_flag > alloc_flag)
1763 return setup_page_sorting(&page_caller_sort, arg);
1764 else
1765 return setup_page_sorting(&page_alloc_sort, arg);
1766 } else {
1767 if (caller_flag > alloc_flag)
1768 return setup_slab_sorting(&slab_caller_sort, arg);
1769 else
1770 return setup_slab_sorting(&slab_alloc_sort, arg);
1771 }
1772
1773 return 0;
1774}
1775
1776static int parse_caller_opt(const struct option *opt __maybe_unused,
1777 const char *arg __maybe_unused,
1778 int unset __maybe_unused)
1779{
1780 caller_flag = (alloc_flag + 1);
1781 return 0;
1782}
1783
1784static int parse_alloc_opt(const struct option *opt __maybe_unused,
1785 const char *arg __maybe_unused,
1786 int unset __maybe_unused)
1787{
1788 alloc_flag = (caller_flag + 1);
1789 return 0;
1790}
1791
1792static int parse_slab_opt(const struct option *opt __maybe_unused,
1793 const char *arg __maybe_unused,
1794 int unset __maybe_unused)
1795{
1796 kmem_slab = (kmem_page + 1);
1797 return 0;
1798}
1799
1800static int parse_page_opt(const struct option *opt __maybe_unused,
1801 const char *arg __maybe_unused,
1802 int unset __maybe_unused)
1803{
1804 kmem_page = (kmem_slab + 1);
1805 return 0;
1806}
1807
1808static int parse_line_opt(const struct option *opt __maybe_unused,
1809 const char *arg, int unset __maybe_unused)
1810{
1811 int lines;
1812
1813 if (!arg)
1814 return -1;
1815
1816 lines = strtoul(arg, NULL, 10);
1817
1818 if (caller_flag > alloc_flag)
1819 caller_lines = lines;
1820 else
1821 alloc_lines = lines;
1822
1823 return 0;
1824}
1825
1826static int __cmd_record(int argc, const char **argv)
1827{
1828 const char * const record_args[] = {
1829 "record", "-a", "-R", "-c", "1",
1830 };
1831 const char * const slab_events[] = {
1832 "-e", "kmem:kmalloc",
1833 "-e", "kmem:kmalloc_node",
1834 "-e", "kmem:kfree",
1835 "-e", "kmem:kmem_cache_alloc",
1836 "-e", "kmem:kmem_cache_alloc_node",
1837 "-e", "kmem:kmem_cache_free",
1838 };
1839 const char * const page_events[] = {
1840 "-e", "kmem:mm_page_alloc",
1841 "-e", "kmem:mm_page_free",
1842 };
1843 unsigned int rec_argc, i, j;
1844 const char **rec_argv;
1845
1846 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
1847 if (kmem_slab)
1848 rec_argc += ARRAY_SIZE(slab_events);
1849 if (kmem_page)
1850 rec_argc += ARRAY_SIZE(page_events) + 1; /* for -g */
1851
1852 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1853
1854 if (rec_argv == NULL)
1855 return -ENOMEM;
1856
1857 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1858 rec_argv[i] = strdup(record_args[i]);
1859
1860 if (kmem_slab) {
1861 for (j = 0; j < ARRAY_SIZE(slab_events); j++, i++)
1862 rec_argv[i] = strdup(slab_events[j]);
1863 }
1864 if (kmem_page) {
1865 rec_argv[i++] = strdup("-g");
1866
1867 for (j = 0; j < ARRAY_SIZE(page_events); j++, i++)
1868 rec_argv[i] = strdup(page_events[j]);
1869 }
1870
1871 for (j = 1; j < (unsigned int)argc; j++, i++)
1872 rec_argv[i] = argv[j];
1873
1874 return cmd_record(i, rec_argv);
1875}
1876
1877static int kmem_config(const char *var, const char *value, void *cb __maybe_unused)
1878{
1879 if (!strcmp(var, "kmem.default")) {
1880 if (!strcmp(value, "slab"))
1881 kmem_default = KMEM_SLAB;
1882 else if (!strcmp(value, "page"))
1883 kmem_default = KMEM_PAGE;
1884 else
1885 pr_err("invalid default value ('slab' or 'page' required): %s\n",
1886 value);
1887 return 0;
1888 }
1889
1890 return 0;
1891}
1892
1893int cmd_kmem(int argc, const char **argv)
1894{
1895 const char * const default_slab_sort = "frag,hit,bytes";
1896 const char * const default_page_sort = "bytes,hit";
1897 struct perf_data data = {
1898 .mode = PERF_DATA_MODE_READ,
1899 };
1900 const struct option kmem_options[] = {
1901 OPT_STRING('i', "input", &input_name, "file", "input file name"),
1902 OPT_INCR('v', "verbose", &verbose,
1903 "be more verbose (show symbol address, etc)"),
1904 OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
1905 "show per-callsite statistics", parse_caller_opt),
1906 OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
1907 "show per-allocation statistics", parse_alloc_opt),
1908 OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
1909 "sort by keys: ptr, callsite, bytes, hit, pingpong, frag, "
1910 "page, order, migtype, gfp", parse_sort_opt),
1911 OPT_CALLBACK('l', "line", NULL, "num", "show n lines", parse_line_opt),
1912 OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
1913 OPT_BOOLEAN('f', "force", &data.force, "don't complain, do it"),
1914 OPT_CALLBACK_NOOPT(0, "slab", NULL, NULL, "Analyze slab allocator",
1915 parse_slab_opt),
1916 OPT_CALLBACK_NOOPT(0, "page", NULL, NULL, "Analyze page allocator",
1917 parse_page_opt),
1918 OPT_BOOLEAN(0, "live", &live_page, "Show live page stat"),
1919 OPT_STRING(0, "time", &time_str, "str",
1920 "Time span of interest (start,stop)"),
1921 OPT_END()
1922 };
1923 const char *const kmem_subcommands[] = { "record", "stat", NULL };
1924 const char *kmem_usage[] = {
1925 NULL,
1926 NULL
1927 };
1928 struct perf_session *session;
1929 static const char errmsg[] = "No %s allocation events found. Have you run 'perf kmem record --%s'?\n";
1930 int ret = perf_config(kmem_config, NULL);
1931
1932 if (ret)
1933 return ret;
1934
1935 argc = parse_options_subcommand(argc, argv, kmem_options,
1936 kmem_subcommands, kmem_usage,
1937 PARSE_OPT_STOP_AT_NON_OPTION);
1938
1939 if (!argc)
1940 usage_with_options(kmem_usage, kmem_options);
1941
1942 if (kmem_slab == 0 && kmem_page == 0) {
1943 if (kmem_default == KMEM_SLAB)
1944 kmem_slab = 1;
1945 else
1946 kmem_page = 1;
1947 }
1948
1949 if (!strncmp(argv[0], "rec", 3)) {
1950 symbol__init(NULL);
1951 return __cmd_record(argc, argv);
1952 }
1953
1954 data.path = input_name;
1955
1956 kmem_session = session = perf_session__new(&data, false, &perf_kmem);
1957 if (IS_ERR(session))
1958 return PTR_ERR(session);
1959
1960 ret = -1;
1961
1962 if (kmem_slab) {
1963 if (!perf_evlist__find_tracepoint_by_name(session->evlist,
1964 "kmem:kmalloc")) {
1965 pr_err(errmsg, "slab", "slab");
1966 goto out_delete;
1967 }
1968 }
1969
1970 if (kmem_page) {
1971 struct evsel *evsel;
1972
1973 evsel = perf_evlist__find_tracepoint_by_name(session->evlist,
1974 "kmem:mm_page_alloc");
1975 if (evsel == NULL) {
1976 pr_err(errmsg, "page", "page");
1977 goto out_delete;
1978 }
1979
1980 kmem_page_size = tep_get_page_size(evsel->tp_format->tep);
1981 symbol_conf.use_callchain = true;
1982 }
1983
1984 symbol__init(&session->header.env);
1985
1986 if (perf_time__parse_str(&ptime, time_str) != 0) {
1987 pr_err("Invalid time string\n");
1988 ret = -EINVAL;
1989 goto out_delete;
1990 }
1991
1992 if (!strcmp(argv[0], "stat")) {
1993 setlocale(LC_ALL, "");
1994
1995 if (cpu__setup_cpunode_map())
1996 goto out_delete;
1997
1998 if (list_empty(&slab_caller_sort))
1999 setup_slab_sorting(&slab_caller_sort, default_slab_sort);
2000 if (list_empty(&slab_alloc_sort))
2001 setup_slab_sorting(&slab_alloc_sort, default_slab_sort);
2002 if (list_empty(&page_caller_sort))
2003 setup_page_sorting(&page_caller_sort, default_page_sort);
2004 if (list_empty(&page_alloc_sort))
2005 setup_page_sorting(&page_alloc_sort, default_page_sort);
2006
2007 if (kmem_page) {
2008 setup_page_sorting(&page_alloc_sort_input,
2009 "page,order,migtype,gfp");
2010 setup_page_sorting(&page_caller_sort_input,
2011 "callsite,order,migtype,gfp");
2012 }
2013 ret = __cmd_kmem(session);
2014 } else
2015 usage_with_options(kmem_usage, kmem_options);
2016
2017out_delete:
2018 perf_session__delete(session);
2019
2020 return ret;
2021}
2022