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