aboutsummaryrefslogtreecommitdiffstats
path: root/tools/perf/builtin-kmem.c
blob: 93c67bf53d2c96e391a649989ab6597728063b1c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
#include "builtin.h"
#include "perf.h"

#include "util/util.h"
#include "util/cache.h"
#include "util/symbol.h"
#include "util/thread.h"
#include "util/header.h"
#include "util/session.h"

#include "util/parse-options.h"
#include "util/trace-event.h"

#include "util/debug.h"

#include <linux/rbtree.h>

struct alloc_stat;
typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);

static char const		*input_name = "perf.data";

static int			alloc_flag;
static int			caller_flag;

static int			alloc_lines = -1;
static int			caller_lines = -1;

static bool			raw_ip;

static char			default_sort_order[] = "frag,hit,bytes";

static int			*cpunode_map;
static int			max_cpu_num;

struct alloc_stat {
	u64	call_site;
	u64	ptr;
	u64	bytes_req;
	u64	bytes_alloc;
	u32	hit;
	u32	pingpong;

	short	alloc_cpu;

	struct rb_node node;
};

static struct rb_root root_alloc_stat;
static struct rb_root root_alloc_sorted;
static struct rb_root root_caller_stat;
static struct rb_root root_caller_sorted;

static unsigned long total_requested, total_allocated;
static unsigned long nr_allocs, nr_cross_allocs;

#define PATH_SYS_NODE	"/sys/devices/system/node"

static void init_cpunode_map(void)
{
	FILE *fp;
	int i;

	fp = fopen("/sys/devices/system/cpu/kernel_max", "r");
	if (!fp) {
		max_cpu_num = 4096;
		return;
	}

	if (fscanf(fp, "%d", &max_cpu_num) < 1)
		die("Failed to read 'kernel_max' from sysfs");
	max_cpu_num++;

	cpunode_map = calloc(max_cpu_num, sizeof(int));
	if (!cpunode_map)
		die("calloc");
	for (i = 0; i < max_cpu_num; i++)
		cpunode_map[i] = -1;
	fclose(fp);
}

static void setup_cpunode_map(void)
{
	struct dirent *dent1, *dent2;
	DIR *dir1, *dir2;
	unsigned int cpu, mem;
	char buf[PATH_MAX];

	init_cpunode_map();

	dir1 = opendir(PATH_SYS_NODE);
	if (!dir1)
		return;

	while (true) {
		dent1 = readdir(dir1);
		if (!dent1)
			break;

		if (sscanf(dent1->d_name, "node%u", &mem) < 1)
			continue;

		snprintf(buf, PATH_MAX, "%s/%s", PATH_SYS_NODE, dent1->d_name);
		dir2 = opendir(buf);
		if (!dir2)
			continue;
		while (true) {
			dent2 = readdir(dir2);
			if (!dent2)
				break;
			if (sscanf(dent2->d_name, "cpu%u", &cpu) < 1)
				continue;
			cpunode_map[cpu] = mem;
		}
	}
}

static void insert_alloc_stat(unsigned long call_site, unsigned long ptr,
			      int bytes_req, int bytes_alloc, int cpu)
{
	struct rb_node **node = &root_alloc_stat.rb_node;
	struct rb_node *parent = NULL;
	struct alloc_stat *data = NULL;

	while (*node) {
		parent = *node;
		data = rb_entry(*node, struct alloc_stat, node);

		if (ptr > data->ptr)
			node = &(*node)->rb_right;
		else if (ptr < data->ptr)
			node = &(*node)->rb_left;
		else
			break;
	}

	if (data && data->ptr == ptr) {
		data->hit++;
		data->bytes_req += bytes_req;
		data->bytes_alloc += bytes_alloc;
	} else {
		data = malloc(sizeof(*data));
		if (!data)
			die("malloc");
		data->ptr = ptr;
		data->pingpong = 0;
		data->hit = 1;
		data->bytes_req = bytes_req;
		data->bytes_alloc = bytes_alloc;

		rb_link_node(&data->node, parent, node);
		rb_insert_color(&data->node, &root_alloc_stat);
	}
	data->call_site = call_site;
	data->alloc_cpu = cpu;
}

static void insert_caller_stat(unsigned long call_site,
			      int bytes_req, int bytes_alloc)
{
	struct rb_node **node = &root_caller_stat.rb_node;
	struct rb_node *parent = NULL;
	struct alloc_stat *data = NULL;

	while (*node) {
		parent = *node;
		data = rb_entry(*node, struct alloc_stat, node);

		if (call_site > data->call_site)
			node = &(*node)->rb_right;
		else if (call_site < data->call_site)
			node = &(*node)->rb_left;
		else
			break;
	}

	if (data && data->call_site == call_site) {
		data->hit++;
		data->bytes_req += bytes_req;
		data->bytes_alloc += bytes_alloc;
	} else {
		data = malloc(sizeof(*data));
		if (!data)
			die("malloc");
		data->call_site = call_site;
		data->pingpong = 0;
		data->hit = 1;
		data->bytes_req = bytes_req;
		data->bytes_alloc = bytes_alloc;

		rb_link_node(&data->node, parent, node);
		rb_insert_color(&data->node, &root_caller_stat);
	}
}

static void process_alloc_event(void *data,
				struct event *event,
				int cpu,
				u64 timestamp __used,
				struct thread *thread __used,
				int node)
{
	unsigned long call_site;
	unsigned long ptr;
	int bytes_req;
	int bytes_alloc;
	int node1, node2;

	ptr = raw_field_value(event, "ptr", data);
	call_site = raw_field_value(event, "call_site", data);
	bytes_req = raw_field_value(event, "bytes_req", data);
	bytes_alloc = raw_field_value(event, "bytes_alloc", data);

	insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, cpu);
	insert_caller_stat(call_site, bytes_req, bytes_alloc);

	total_requested += bytes_req;
	total_allocated += bytes_alloc;

	if (node) {
		node1 = cpunode_map[cpu];
		node2 = raw_field_value(event, "node", data);
		if (node1 != node2)
			nr_cross_allocs++;
	}
	nr_allocs++;
}

static int ptr_cmp(struct alloc_stat *, struct alloc_stat *);
static int callsite_cmp(struct alloc_stat *, struct alloc_stat *);

static struct alloc_stat *search_alloc_stat(unsigned long ptr,
					    unsigned long call_site,
					    struct rb_root *root,
					    sort_fn_t sort_fn)
{
	struct rb_node *node = root->rb_node;
	struct alloc_stat key = { .ptr = ptr, .call_site = call_site };

	while (node) {
		struct alloc_stat *data;
		int cmp;

		data = rb_entry(node, struct alloc_stat, node);

		cmp = sort_fn(&key, data);
		if (cmp < 0)
			node = node->rb_left;
		else if (cmp > 0)
			node = node->rb_right;
		else
			return data;
	}
	return NULL;
}

static void process_free_event(void *data,
			       struct event *event,
			       int cpu,
			       u64 timestamp __used,
			       struct thread *thread __used)
{
	unsigned long ptr;
	struct alloc_stat *s_alloc, *s_caller;

	ptr = raw_field_value(event, "ptr", data);

	s_alloc = search_alloc_stat(ptr, 0, &root_alloc_stat, ptr_cmp);
	if (!s_alloc)
		return;

	if (cpu != s_alloc->alloc_cpu) {
		s_alloc->pingpong++;

		s_caller = search_alloc_stat(0, s_alloc->call_site,
					     &root_caller_stat, callsite_cmp);
		assert(s_caller);
		s_caller->pingpong++;
	}
	s_alloc->alloc_cpu = -1;
}

static void
process_raw_event(event_t *raw_event __used, void *data,
		  int cpu, u64 timestamp, struct thread *thread)
{
	struct event *event;
	int type;

	type = trace_parse_common_type(data);
	event = trace_find_event(type);

	if (!strcmp(event->name, "kmalloc") ||
	    !strcmp(event->name, "kmem_cache_alloc")) {
		process_alloc_event(data, event, cpu, timestamp, thread, 0);
		return;
	}

	if (!strcmp(event->name, "kmalloc_node") ||
	    !strcmp(event->name, "kmem_cache_alloc_node")) {
		process_alloc_event(data, event, cpu, timestamp, thread, 1);
		return;
	}

	if (!strcmp(event->name, "kfree") ||
	    !strcmp(event->name, "kmem_cache_free")) {
		process_free_event(data, event, cpu, timestamp, thread);
		return;
	}
}

static int process_sample_event(event_t *event, struct perf_session *session)
{
	struct sample_data data;
	struct thread *thread;

	memset(&data, 0, sizeof(data));
	data.time = -1;
	data.cpu = -1;
	data.period = 1;

	event__parse_sample(event, session->sample_type, &data);

	dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
		event->header.misc,
		data.pid, data.tid,
		(void *)(long)data.ip,
		(long long)data.period);

	thread = perf_session__findnew(session, event->ip.pid);
	if (thread == NULL) {
		pr_debug("problem processing %d event, skipping it.\n",
			 event->header.type);
		return -1;
	}

	dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);

	process_raw_event(event, data.raw_data, data.cpu,
			  data.time, thread);

	return 0;
}

static int sample_type_check(struct perf_session *session)
{
	if (!(session->sample_type & PERF_SAMPLE_RAW)) {
		fprintf(stderr,
			"No trace sample to read. Did you call perf record "
			"without -R?");
		return -1;
	}

	return 0;
}

static struct perf_event_ops event_ops = {
	.process_sample_event	= process_sample_event,
	.process_comm_event	= event__process_comm,
	.sample_type_check	= sample_type_check,
};

static double fragmentation(unsigned long n_req, unsigned long n_alloc)
{
	if (n_alloc == 0)
		return 0.0;
	else
		return 100.0 - (100.0 * n_req / n_alloc);
}

static void __print_result(struct rb_root *root, struct perf_session *session,
			   int n_lines, int is_caller)
{
	struct rb_node *next;

	printf("%.102s\n", graph_dotted_line);
	printf(" %-34s |",  is_caller ? "Callsite": "Alloc Ptr");
	printf(" Total_alloc/Per | Total_req/Per   | Hit      | Ping-pong | Frag\n");
	printf("%.102s\n", graph_dotted_line);

	next = rb_first(root);

	while (next && n_lines--) {
		struct alloc_stat *data = rb_entry(next, struct alloc_stat,
						   node);
		struct symbol *sym = NULL;
		char buf[BUFSIZ];
		u64 addr;

		if (is_caller) {
			addr = data->call_site;
			if (!raw_ip)
				sym = map_groups__find_function(&session->kmaps, session, addr, NULL);
		} else
			addr = data->ptr;

		if (sym != NULL)
			snprintf(buf, sizeof(buf), "%s+%Lx", sym->name,
				 addr - sym->start);
		else
			snprintf(buf, sizeof(buf), "%#Lx", addr);
		printf(" %-34s |", buf);

		printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %8lu | %6.3f%%\n",
		       (unsigned long long)data->bytes_alloc,
		       (unsigned long)data->bytes_alloc / data->hit,
		       (unsigned long long)data->bytes_req,
		       (unsigned long)data->bytes_req / data->hit,
		       (unsigned long)data->hit,
		       (unsigned long)data->pingpong,
		       fragmentation(data->bytes_req, data->bytes_alloc));

		next = rb_next(next);
	}

	if (n_lines == -1)
		printf(" ...                                | ...             | ...             | ...    | ...      | ...   \n");

	printf("%.102s\n", graph_dotted_line);
}

static void print_summary(void)
{
	printf("\nSUMMARY\n=======\n");
	printf("Total bytes requested: %lu\n", total_requested);
	printf("Total bytes allocated: %lu\n", total_allocated);
	printf("Total bytes wasted on internal fragmentation: %lu\n",
	       total_allocated - total_requested);
	printf("Internal fragmentation: %f%%\n",
	       fragmentation(total_requested, total_allocated));
	printf("Cross CPU allocations: %lu/%lu\n", nr_cross_allocs, nr_allocs);
}

static void print_result(struct perf_session *session)
{
	if (caller_flag)
		__print_result(&root_caller_sorted, session, caller_lines, 1);
	if (alloc_flag)
		__print_result(&root_alloc_sorted, session, alloc_lines, 0);
	print_summary();
}

struct sort_dimension {
	const char		name[20];
	sort_fn_t		cmp;
	struct list_head	list;
};

static LIST_HEAD(caller_sort);
static LIST_HEAD(alloc_sort);

static void sort_insert(struct rb_root *root, struct alloc_stat *data,
			struct list_head *sort_list)
{
	struct rb_node **new = &(root->rb_node);
	struct rb_node *parent = NULL;
	struct sort_dimension *sort;

	while (*new) {
		struct alloc_stat *this;
		int cmp = 0;

		this = rb_entry(*new, struct alloc_stat, node);
		parent = *new;

		list_for_each_entry(sort, sort_list, list) {
			cmp = sort->cmp(data, this);
			if (cmp)
				break;
		}

		if (cmp > 0)
			new = &((*new)->rb_left);
		else
			new = &((*new)->rb_right);
	}

	rb_link_node(&data->node, parent, new);
	rb_insert_color(&data->node, root);
}

static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
			  struct list_head *sort_list)
{
	struct rb_node *node;
	struct alloc_stat *data;

	for (;;) {
		node = rb_first(root);
		if (!node)
			break;

		rb_erase(node, root);
		data = rb_entry(node, struct alloc_stat, node);
		sort_insert(root_sorted, data, sort_list);
	}
}

static void sort_result(void)
{
	__sort_result(&root_alloc_stat, &root_alloc_sorted, &alloc_sort);
	__sort_result(&root_caller_stat, &root_caller_sorted, &caller_sort);
}

static int __cmd_kmem(void)
{
	int err;
	struct perf_session *session = perf_session__new(input_name, O_RDONLY, 0);
	if (session == NULL)
		return -ENOMEM;

	setup_pager();
	err = perf_session__process_events(session, &event_ops);
	if (err != 0)
		goto out_delete;
	sort_result();
	print_result(session);
out_delete:
	perf_session__delete(session);
	return err;
}

static const char * const kmem_usage[] = {
	"perf kmem [<options>] {record|stat}",
	NULL
};

static int ptr_cmp(struct alloc_stat *l, struct alloc_stat *r)
{
	if (l->ptr < r->ptr)
		return -1;
	else if (l->ptr > r->ptr)
		return 1;
	return 0;
}

static struct sort_dimension ptr_sort_dimension = {
	.name	= "ptr",
	.cmp	= ptr_cmp,
};

static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
{
	if (l->call_site < r->call_site)
		return -1;
	else if (l->call_site > r->call_site)
		return 1;
	return 0;
}

static struct sort_dimension callsite_sort_dimension = {
	.name	= "callsite",
	.cmp	= callsite_cmp,
};

static int hit_cmp(struct alloc_stat *l, struct alloc_stat *r)
{
	if (l->hit < r->hit)
		return -1;
	else if (l->hit > r->hit)
		return 1;
	return 0;
}

static struct sort_dimension hit_sort_dimension = {
	.name	= "hit",
	.cmp	= hit_cmp,
};

static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
{
	if (l->bytes_alloc < r->bytes_alloc)
		return -1;
	else if (l->bytes_alloc > r->bytes_alloc)
		return 1;
	return 0;
}

static struct sort_dimension bytes_sort_dimension = {
	.name	= "bytes",
	.cmp	= bytes_cmp,
};

static int frag_cmp(struct alloc_stat *l, struct alloc_stat *r)
{
	double x, y;

	x = fragmentation(l->bytes_req, l->bytes_alloc);
	y = fragmentation(r->bytes_req, r->bytes_alloc);

	if (x < y)
		return -1;
	else if (x > y)
		return 1;
	return 0;
}

static struct sort_dimension frag_sort_dimension = {
	.name	= "frag",
	.cmp	= frag_cmp,
};

static int pingpong_cmp(struct alloc_stat *l, struct alloc_stat *r)
{
	if (l->pingpong < r->pingpong)
		return -1;
	else if (l->pingpong > r->pingpong)
		return 1;
	return 0;
}

static struct sort_dimension pingpong_sort_dimension = {
	.name	= "pingpong",
	.cmp	= pingpong_cmp,
};

static struct sort_dimension *avail_sorts[] = {
	&ptr_sort_dimension,
	&callsite_sort_dimension,
	&hit_sort_dimension,
	&bytes_sort_dimension,
	&frag_sort_dimension,
	&pingpong_sort_dimension,
};

#define NUM_AVAIL_SORTS	\
	(int)(sizeof(avail_sorts) / sizeof(struct sort_dimension *))

static int sort_dimension__add(const char *tok, struct list_head *list)
{
	struct sort_dimension *sort;
	int i;

	for (i = 0; i < NUM_AVAIL_SORTS; i++) {
		if (!strcmp(avail_sorts[i]->name, tok)) {
			sort = malloc(sizeof(*sort));
			if (!sort)
				die("malloc");
			memcpy(sort, avail_sorts[i], sizeof(*sort));
			list_add_tail(&sort->list, list);
			return 0;
		}
	}

	return -1;
}

static int setup_sorting(struct list_head *sort_list, const char *arg)
{
	char *tok;
	char *str = strdup(arg);

	if (!str)
		die("strdup");

	while (true) {
		tok = strsep(&str, ",");
		if (!tok)
			break;
		if (sort_dimension__add(tok, sort_list) < 0) {
			error("Unknown --sort key: '%s'", tok);
			return -1;
		}
	}

	free(str);
	return 0;
}

static int parse_sort_opt(const struct option *opt __used,
			  const char *arg, int unset __used)
{
	if (!arg)
		return -1;

	if (caller_flag > alloc_flag)
		return setup_sorting(&caller_sort, arg);
	else
		return setup_sorting(&alloc_sort, arg);

	return 0;
}

static int parse_caller_opt(const struct option *opt __used,
			  const char *arg __used, int unset __used)
{
	caller_flag = (alloc_flag + 1);
	return 0;
}

static int parse_alloc_opt(const struct option *opt __used,
			  const char *arg __used, int unset __used)
{
	alloc_flag = (caller_flag + 1);
	return 0;
}

static int parse_line_opt(const struct option *opt __used,
			  const char *arg, int unset __used)
{
	int lines;

	if (!arg)
		return -1;

	lines = strtoul(arg, NULL, 10);

	if (caller_flag > alloc_flag)
		caller_lines = lines;
	else
		alloc_lines = lines;

	return 0;
}

static const struct option kmem_options[] = {
	OPT_STRING('i', "input", &input_name, "file",
		   "input file name"),
	OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
			   "show per-callsite statistics",
			   parse_caller_opt),
	OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
			   "show per-allocation statistics",
			   parse_alloc_opt),
	OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
		     "sort by keys: ptr, call_site, bytes, hit, pingpong, frag",
		     parse_sort_opt),
	OPT_CALLBACK('l', "line", NULL, "num",
		     "show n lines",
		     parse_line_opt),
	OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
	OPT_END()
};

static const char *record_args[] = {
	"record",
	"-a",
	"-R",
	"-M",
	"-f",
	"-c", "1",
	"-e", "kmem:kmalloc",
	"-e", "kmem:kmalloc_node",
	"-e", "kmem:kfree",
	"-e", "kmem:kmem_cache_alloc",
	"-e", "kmem:kmem_cache_alloc_node",
	"-e", "kmem:kmem_cache_free",
};

static int __cmd_record(int argc, const char **argv)
{
	unsigned int rec_argc, i, j;
	const char **rec_argv;

	rec_argc = ARRAY_SIZE(record_args) + argc - 1;
	rec_argv = calloc(rec_argc + 1, sizeof(char *));

	for (i = 0; i < ARRAY_SIZE(record_args); i++)
		rec_argv[i] = strdup(record_args[i]);

	for (j = 1; j < (unsigned int)argc; j++, i++)
		rec_argv[i] = argv[j];

	return cmd_record(i, rec_argv, NULL);
}

int cmd_kmem(int argc, const char **argv, const char *prefix __used)
{
	argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);

	if (!argc)
		usage_with_options(kmem_usage, kmem_options);

	symbol__init();

	if (!strncmp(argv[0], "rec", 3)) {
		return __cmd_record(argc, argv);
	} else if (!strcmp(argv[0], "stat")) {
		setup_cpunode_map();

		if (list_empty(&caller_sort))
			setup_sorting(&caller_sort, default_sort_order);
		if (list_empty(&alloc_sort))
			setup_sorting(&alloc_sort, default_sort_order);

		return __cmd_kmem();
	} else
		usage_with_options(kmem_usage, kmem_options);

	return 0;
}

Privacy Policy