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Merge branches 'fixes', 'misc', 'mmci', 'unstable/dma-for-next' and 'sa11x0' into...
[karo-tx-linux.git] / tools / perf / builtin-kmem.c
1 #include "builtin.h"
2 #include "perf.h"
3
4 #include "util/evlist.h"
5 #include "util/evsel.h"
6 #include "util/util.h"
7 #include "util/cache.h"
8 #include "util/symbol.h"
9 #include "util/thread.h"
10 #include "util/header.h"
11 #include "util/session.h"
12 #include "util/tool.h"
13
14 #include "util/parse-options.h"
15 #include "util/trace-event.h"
16
17 #include "util/debug.h"
18
19 #include <linux/rbtree.h>
20 #include <linux/string.h>
21
22 struct alloc_stat;
23 typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);
24
25 static int                      alloc_flag;
26 static int                      caller_flag;
27
28 static int                      alloc_lines = -1;
29 static int                      caller_lines = -1;
30
31 static bool                     raw_ip;
32
33 static int                      *cpunode_map;
34 static int                      max_cpu_num;
35
36 struct alloc_stat {
37         u64     call_site;
38         u64     ptr;
39         u64     bytes_req;
40         u64     bytes_alloc;
41         u32     hit;
42         u32     pingpong;
43
44         short   alloc_cpu;
45
46         struct rb_node node;
47 };
48
49 static struct rb_root root_alloc_stat;
50 static struct rb_root root_alloc_sorted;
51 static struct rb_root root_caller_stat;
52 static struct rb_root root_caller_sorted;
53
54 static unsigned long total_requested, total_allocated;
55 static unsigned long nr_allocs, nr_cross_allocs;
56
57 #define PATH_SYS_NODE   "/sys/devices/system/node"
58
59 static int init_cpunode_map(void)
60 {
61         FILE *fp;
62         int i, err = -1;
63
64         fp = fopen("/sys/devices/system/cpu/kernel_max", "r");
65         if (!fp) {
66                 max_cpu_num = 4096;
67                 return 0;
68         }
69
70         if (fscanf(fp, "%d", &max_cpu_num) < 1) {
71                 pr_err("Failed to read 'kernel_max' from sysfs");
72                 goto out_close;
73         }
74
75         max_cpu_num++;
76
77         cpunode_map = calloc(max_cpu_num, sizeof(int));
78         if (!cpunode_map) {
79                 pr_err("%s: calloc failed\n", __func__);
80                 goto out_close;
81         }
82
83         for (i = 0; i < max_cpu_num; i++)
84                 cpunode_map[i] = -1;
85
86         err = 0;
87 out_close:
88         fclose(fp);
89         return err;
90 }
91
92 static int setup_cpunode_map(void)
93 {
94         struct dirent *dent1, *dent2;
95         DIR *dir1, *dir2;
96         unsigned int cpu, mem;
97         char buf[PATH_MAX];
98
99         if (init_cpunode_map())
100                 return -1;
101
102         dir1 = opendir(PATH_SYS_NODE);
103         if (!dir1)
104                 return 0;
105
106         while ((dent1 = readdir(dir1)) != NULL) {
107                 if (dent1->d_type != DT_DIR ||
108                     sscanf(dent1->d_name, "node%u", &mem) < 1)
109                         continue;
110
111                 snprintf(buf, PATH_MAX, "%s/%s", PATH_SYS_NODE, dent1->d_name);
112                 dir2 = opendir(buf);
113                 if (!dir2)
114                         continue;
115                 while ((dent2 = readdir(dir2)) != NULL) {
116                         if (dent2->d_type != DT_LNK ||
117                             sscanf(dent2->d_name, "cpu%u", &cpu) < 1)
118                                 continue;
119                         cpunode_map[cpu] = mem;
120                 }
121                 closedir(dir2);
122         }
123         closedir(dir1);
124         return 0;
125 }
126
127 static int insert_alloc_stat(unsigned long call_site, unsigned long ptr,
128                              int bytes_req, int bytes_alloc, int cpu)
129 {
130         struct rb_node **node = &root_alloc_stat.rb_node;
131         struct rb_node *parent = NULL;
132         struct alloc_stat *data = NULL;
133
134         while (*node) {
135                 parent = *node;
136                 data = rb_entry(*node, struct alloc_stat, node);
137
138                 if (ptr > data->ptr)
139                         node = &(*node)->rb_right;
140                 else if (ptr < data->ptr)
141                         node = &(*node)->rb_left;
142                 else
143                         break;
144         }
145
146         if (data && data->ptr == ptr) {
147                 data->hit++;
148                 data->bytes_req += bytes_req;
149                 data->bytes_alloc += bytes_alloc;
150         } else {
151                 data = malloc(sizeof(*data));
152                 if (!data) {
153                         pr_err("%s: malloc failed\n", __func__);
154                         return -1;
155                 }
156                 data->ptr = ptr;
157                 data->pingpong = 0;
158                 data->hit = 1;
159                 data->bytes_req = bytes_req;
160                 data->bytes_alloc = bytes_alloc;
161
162                 rb_link_node(&data->node, parent, node);
163                 rb_insert_color(&data->node, &root_alloc_stat);
164         }
165         data->call_site = call_site;
166         data->alloc_cpu = cpu;
167         return 0;
168 }
169
170 static int insert_caller_stat(unsigned long call_site,
171                               int bytes_req, int bytes_alloc)
172 {
173         struct rb_node **node = &root_caller_stat.rb_node;
174         struct rb_node *parent = NULL;
175         struct alloc_stat *data = NULL;
176
177         while (*node) {
178                 parent = *node;
179                 data = rb_entry(*node, struct alloc_stat, node);
180
181                 if (call_site > data->call_site)
182                         node = &(*node)->rb_right;
183                 else if (call_site < data->call_site)
184                         node = &(*node)->rb_left;
185                 else
186                         break;
187         }
188
189         if (data && data->call_site == call_site) {
190                 data->hit++;
191                 data->bytes_req += bytes_req;
192                 data->bytes_alloc += bytes_alloc;
193         } else {
194                 data = malloc(sizeof(*data));
195                 if (!data) {
196                         pr_err("%s: malloc failed\n", __func__);
197                         return -1;
198                 }
199                 data->call_site = call_site;
200                 data->pingpong = 0;
201                 data->hit = 1;
202                 data->bytes_req = bytes_req;
203                 data->bytes_alloc = bytes_alloc;
204
205                 rb_link_node(&data->node, parent, node);
206                 rb_insert_color(&data->node, &root_caller_stat);
207         }
208
209         return 0;
210 }
211
212 static int perf_evsel__process_alloc_event(struct perf_evsel *evsel,
213                                            struct perf_sample *sample)
214 {
215         unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr"),
216                       call_site = perf_evsel__intval(evsel, sample, "call_site");
217         int bytes_req = perf_evsel__intval(evsel, sample, "bytes_req"),
218             bytes_alloc = perf_evsel__intval(evsel, sample, "bytes_alloc");
219
220         if (insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, sample->cpu) ||
221             insert_caller_stat(call_site, bytes_req, bytes_alloc))
222                 return -1;
223
224         total_requested += bytes_req;
225         total_allocated += bytes_alloc;
226
227         nr_allocs++;
228         return 0;
229 }
230
231 static int perf_evsel__process_alloc_node_event(struct perf_evsel *evsel,
232                                                 struct perf_sample *sample)
233 {
234         int ret = perf_evsel__process_alloc_event(evsel, sample);
235
236         if (!ret) {
237                 int node1 = cpunode_map[sample->cpu],
238                     node2 = perf_evsel__intval(evsel, sample, "node");
239
240                 if (node1 != node2)
241                         nr_cross_allocs++;
242         }
243
244         return ret;
245 }
246
247 static int ptr_cmp(struct alloc_stat *, struct alloc_stat *);
248 static int callsite_cmp(struct alloc_stat *, struct alloc_stat *);
249
250 static struct alloc_stat *search_alloc_stat(unsigned long ptr,
251                                             unsigned long call_site,
252                                             struct rb_root *root,
253                                             sort_fn_t sort_fn)
254 {
255         struct rb_node *node = root->rb_node;
256         struct alloc_stat key = { .ptr = ptr, .call_site = call_site };
257
258         while (node) {
259                 struct alloc_stat *data;
260                 int cmp;
261
262                 data = rb_entry(node, struct alloc_stat, node);
263
264                 cmp = sort_fn(&key, data);
265                 if (cmp < 0)
266                         node = node->rb_left;
267                 else if (cmp > 0)
268                         node = node->rb_right;
269                 else
270                         return data;
271         }
272         return NULL;
273 }
274
275 static int perf_evsel__process_free_event(struct perf_evsel *evsel,
276                                           struct perf_sample *sample)
277 {
278         unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr");
279         struct alloc_stat *s_alloc, *s_caller;
280
281         s_alloc = search_alloc_stat(ptr, 0, &root_alloc_stat, ptr_cmp);
282         if (!s_alloc)
283                 return 0;
284
285         if ((short)sample->cpu != s_alloc->alloc_cpu) {
286                 s_alloc->pingpong++;
287
288                 s_caller = search_alloc_stat(0, s_alloc->call_site,
289                                              &root_caller_stat, callsite_cmp);
290                 if (!s_caller)
291                         return -1;
292                 s_caller->pingpong++;
293         }
294         s_alloc->alloc_cpu = -1;
295
296         return 0;
297 }
298
299 typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
300                                   struct perf_sample *sample);
301
302 static int process_sample_event(struct perf_tool *tool __maybe_unused,
303                                 union perf_event *event,
304                                 struct perf_sample *sample,
305                                 struct perf_evsel *evsel,
306                                 struct machine *machine)
307 {
308         struct thread *thread = machine__findnew_thread(machine, sample->pid,
309                                                         sample->pid);
310
311         if (thread == NULL) {
312                 pr_debug("problem processing %d event, skipping it.\n",
313                          event->header.type);
314                 return -1;
315         }
316
317         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->tid);
318
319         if (evsel->handler.func != NULL) {
320                 tracepoint_handler f = evsel->handler.func;
321                 return f(evsel, sample);
322         }
323
324         return 0;
325 }
326
327 static struct perf_tool perf_kmem = {
328         .sample          = process_sample_event,
329         .comm            = perf_event__process_comm,
330         .ordered_samples = true,
331 };
332
333 static double fragmentation(unsigned long n_req, unsigned long n_alloc)
334 {
335         if (n_alloc == 0)
336                 return 0.0;
337         else
338                 return 100.0 - (100.0 * n_req / n_alloc);
339 }
340
341 static void __print_result(struct rb_root *root, struct perf_session *session,
342                            int n_lines, int is_caller)
343 {
344         struct rb_node *next;
345         struct machine *machine = &session->machines.host;
346
347         printf("%.102s\n", graph_dotted_line);
348         printf(" %-34s |",  is_caller ? "Callsite": "Alloc Ptr");
349         printf(" Total_alloc/Per | Total_req/Per   | Hit      | Ping-pong | Frag\n");
350         printf("%.102s\n", graph_dotted_line);
351
352         next = rb_first(root);
353
354         while (next && n_lines--) {
355                 struct alloc_stat *data = rb_entry(next, struct alloc_stat,
356                                                    node);
357                 struct symbol *sym = NULL;
358                 struct map *map;
359                 char buf[BUFSIZ];
360                 u64 addr;
361
362                 if (is_caller) {
363                         addr = data->call_site;
364                         if (!raw_ip)
365                                 sym = machine__find_kernel_function(machine, addr, &map, NULL);
366                 } else
367                         addr = data->ptr;
368
369                 if (sym != NULL)
370                         snprintf(buf, sizeof(buf), "%s+%" PRIx64 "", sym->name,
371                                  addr - map->unmap_ip(map, sym->start));
372                 else
373                         snprintf(buf, sizeof(buf), "%#" PRIx64 "", addr);
374                 printf(" %-34s |", buf);
375
376                 printf(" %9llu/%-5lu | %9llu/%-5lu | %8lu | %8lu | %6.3f%%\n",
377                        (unsigned long long)data->bytes_alloc,
378                        (unsigned long)data->bytes_alloc / data->hit,
379                        (unsigned long long)data->bytes_req,
380                        (unsigned long)data->bytes_req / data->hit,
381                        (unsigned long)data->hit,
382                        (unsigned long)data->pingpong,
383                        fragmentation(data->bytes_req, data->bytes_alloc));
384
385                 next = rb_next(next);
386         }
387
388         if (n_lines == -1)
389                 printf(" ...                                | ...             | ...             | ...    | ...      | ...   \n");
390
391         printf("%.102s\n", graph_dotted_line);
392 }
393
394 static void print_summary(void)
395 {
396         printf("\nSUMMARY\n=======\n");
397         printf("Total bytes requested: %lu\n", total_requested);
398         printf("Total bytes allocated: %lu\n", total_allocated);
399         printf("Total bytes wasted on internal fragmentation: %lu\n",
400                total_allocated - total_requested);
401         printf("Internal fragmentation: %f%%\n",
402                fragmentation(total_requested, total_allocated));
403         printf("Cross CPU allocations: %lu/%lu\n", nr_cross_allocs, nr_allocs);
404 }
405
406 static void print_result(struct perf_session *session)
407 {
408         if (caller_flag)
409                 __print_result(&root_caller_sorted, session, caller_lines, 1);
410         if (alloc_flag)
411                 __print_result(&root_alloc_sorted, session, alloc_lines, 0);
412         print_summary();
413 }
414
415 struct sort_dimension {
416         const char              name[20];
417         sort_fn_t               cmp;
418         struct list_head        list;
419 };
420
421 static LIST_HEAD(caller_sort);
422 static LIST_HEAD(alloc_sort);
423
424 static void sort_insert(struct rb_root *root, struct alloc_stat *data,
425                         struct list_head *sort_list)
426 {
427         struct rb_node **new = &(root->rb_node);
428         struct rb_node *parent = NULL;
429         struct sort_dimension *sort;
430
431         while (*new) {
432                 struct alloc_stat *this;
433                 int cmp = 0;
434
435                 this = rb_entry(*new, struct alloc_stat, node);
436                 parent = *new;
437
438                 list_for_each_entry(sort, sort_list, list) {
439                         cmp = sort->cmp(data, this);
440                         if (cmp)
441                                 break;
442                 }
443
444                 if (cmp > 0)
445                         new = &((*new)->rb_left);
446                 else
447                         new = &((*new)->rb_right);
448         }
449
450         rb_link_node(&data->node, parent, new);
451         rb_insert_color(&data->node, root);
452 }
453
454 static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
455                           struct list_head *sort_list)
456 {
457         struct rb_node *node;
458         struct alloc_stat *data;
459
460         for (;;) {
461                 node = rb_first(root);
462                 if (!node)
463                         break;
464
465                 rb_erase(node, root);
466                 data = rb_entry(node, struct alloc_stat, node);
467                 sort_insert(root_sorted, data, sort_list);
468         }
469 }
470
471 static void sort_result(void)
472 {
473         __sort_result(&root_alloc_stat, &root_alloc_sorted, &alloc_sort);
474         __sort_result(&root_caller_stat, &root_caller_sorted, &caller_sort);
475 }
476
477 static int __cmd_kmem(void)
478 {
479         int err = -EINVAL;
480         struct perf_session *session;
481         const struct perf_evsel_str_handler kmem_tracepoints[] = {
482                 { "kmem:kmalloc",               perf_evsel__process_alloc_event, },
483                 { "kmem:kmem_cache_alloc",      perf_evsel__process_alloc_event, },
484                 { "kmem:kmalloc_node",          perf_evsel__process_alloc_node_event, },
485                 { "kmem:kmem_cache_alloc_node", perf_evsel__process_alloc_node_event, },
486                 { "kmem:kfree",                 perf_evsel__process_free_event, },
487                 { "kmem:kmem_cache_free",       perf_evsel__process_free_event, },
488         };
489
490         session = perf_session__new(input_name, O_RDONLY, 0, false, &perf_kmem);
491         if (session == NULL)
492                 return -ENOMEM;
493
494         if (perf_session__create_kernel_maps(session) < 0)
495                 goto out_delete;
496
497         if (!perf_session__has_traces(session, "kmem record"))
498                 goto out_delete;
499
500         if (perf_session__set_tracepoints_handlers(session, kmem_tracepoints)) {
501                 pr_err("Initializing perf session tracepoint handlers failed\n");
502                 return -1;
503         }
504
505         setup_pager();
506         err = perf_session__process_events(session, &perf_kmem);
507         if (err != 0)
508                 goto out_delete;
509         sort_result();
510         print_result(session);
511 out_delete:
512         perf_session__delete(session);
513         return err;
514 }
515
516 static int ptr_cmp(struct alloc_stat *l, struct alloc_stat *r)
517 {
518         if (l->ptr < r->ptr)
519                 return -1;
520         else if (l->ptr > r->ptr)
521                 return 1;
522         return 0;
523 }
524
525 static struct sort_dimension ptr_sort_dimension = {
526         .name   = "ptr",
527         .cmp    = ptr_cmp,
528 };
529
530 static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
531 {
532         if (l->call_site < r->call_site)
533                 return -1;
534         else if (l->call_site > r->call_site)
535                 return 1;
536         return 0;
537 }
538
539 static struct sort_dimension callsite_sort_dimension = {
540         .name   = "callsite",
541         .cmp    = callsite_cmp,
542 };
543
544 static int hit_cmp(struct alloc_stat *l, struct alloc_stat *r)
545 {
546         if (l->hit < r->hit)
547                 return -1;
548         else if (l->hit > r->hit)
549                 return 1;
550         return 0;
551 }
552
553 static struct sort_dimension hit_sort_dimension = {
554         .name   = "hit",
555         .cmp    = hit_cmp,
556 };
557
558 static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
559 {
560         if (l->bytes_alloc < r->bytes_alloc)
561                 return -1;
562         else if (l->bytes_alloc > r->bytes_alloc)
563                 return 1;
564         return 0;
565 }
566
567 static struct sort_dimension bytes_sort_dimension = {
568         .name   = "bytes",
569         .cmp    = bytes_cmp,
570 };
571
572 static int frag_cmp(struct alloc_stat *l, struct alloc_stat *r)
573 {
574         double x, y;
575
576         x = fragmentation(l->bytes_req, l->bytes_alloc);
577         y = fragmentation(r->bytes_req, r->bytes_alloc);
578
579         if (x < y)
580                 return -1;
581         else if (x > y)
582                 return 1;
583         return 0;
584 }
585
586 static struct sort_dimension frag_sort_dimension = {
587         .name   = "frag",
588         .cmp    = frag_cmp,
589 };
590
591 static int pingpong_cmp(struct alloc_stat *l, struct alloc_stat *r)
592 {
593         if (l->pingpong < r->pingpong)
594                 return -1;
595         else if (l->pingpong > r->pingpong)
596                 return 1;
597         return 0;
598 }
599
600 static struct sort_dimension pingpong_sort_dimension = {
601         .name   = "pingpong",
602         .cmp    = pingpong_cmp,
603 };
604
605 static struct sort_dimension *avail_sorts[] = {
606         &ptr_sort_dimension,
607         &callsite_sort_dimension,
608         &hit_sort_dimension,
609         &bytes_sort_dimension,
610         &frag_sort_dimension,
611         &pingpong_sort_dimension,
612 };
613
614 #define NUM_AVAIL_SORTS ((int)ARRAY_SIZE(avail_sorts))
615
616 static int sort_dimension__add(const char *tok, struct list_head *list)
617 {
618         struct sort_dimension *sort;
619         int i;
620
621         for (i = 0; i < NUM_AVAIL_SORTS; i++) {
622                 if (!strcmp(avail_sorts[i]->name, tok)) {
623                         sort = memdup(avail_sorts[i], sizeof(*avail_sorts[i]));
624                         if (!sort) {
625                                 pr_err("%s: memdup failed\n", __func__);
626                                 return -1;
627                         }
628                         list_add_tail(&sort->list, list);
629                         return 0;
630                 }
631         }
632
633         return -1;
634 }
635
636 static int setup_sorting(struct list_head *sort_list, const char *arg)
637 {
638         char *tok;
639         char *str = strdup(arg);
640
641         if (!str) {
642                 pr_err("%s: strdup failed\n", __func__);
643                 return -1;
644         }
645
646         while (true) {
647                 tok = strsep(&str, ",");
648                 if (!tok)
649                         break;
650                 if (sort_dimension__add(tok, sort_list) < 0) {
651                         error("Unknown --sort key: '%s'", tok);
652                         free(str);
653                         return -1;
654                 }
655         }
656
657         free(str);
658         return 0;
659 }
660
661 static int parse_sort_opt(const struct option *opt __maybe_unused,
662                           const char *arg, int unset __maybe_unused)
663 {
664         if (!arg)
665                 return -1;
666
667         if (caller_flag > alloc_flag)
668                 return setup_sorting(&caller_sort, arg);
669         else
670                 return setup_sorting(&alloc_sort, arg);
671
672         return 0;
673 }
674
675 static int parse_caller_opt(const struct option *opt __maybe_unused,
676                             const char *arg __maybe_unused,
677                             int unset __maybe_unused)
678 {
679         caller_flag = (alloc_flag + 1);
680         return 0;
681 }
682
683 static int parse_alloc_opt(const struct option *opt __maybe_unused,
684                            const char *arg __maybe_unused,
685                            int unset __maybe_unused)
686 {
687         alloc_flag = (caller_flag + 1);
688         return 0;
689 }
690
691 static int parse_line_opt(const struct option *opt __maybe_unused,
692                           const char *arg, int unset __maybe_unused)
693 {
694         int lines;
695
696         if (!arg)
697                 return -1;
698
699         lines = strtoul(arg, NULL, 10);
700
701         if (caller_flag > alloc_flag)
702                 caller_lines = lines;
703         else
704                 alloc_lines = lines;
705
706         return 0;
707 }
708
709 static int __cmd_record(int argc, const char **argv)
710 {
711         const char * const record_args[] = {
712         "record", "-a", "-R", "-c", "1",
713         "-e", "kmem:kmalloc",
714         "-e", "kmem:kmalloc_node",
715         "-e", "kmem:kfree",
716         "-e", "kmem:kmem_cache_alloc",
717         "-e", "kmem:kmem_cache_alloc_node",
718         "-e", "kmem:kmem_cache_free",
719         };
720         unsigned int rec_argc, i, j;
721         const char **rec_argv;
722
723         rec_argc = ARRAY_SIZE(record_args) + argc - 1;
724         rec_argv = calloc(rec_argc + 1, sizeof(char *));
725
726         if (rec_argv == NULL)
727                 return -ENOMEM;
728
729         for (i = 0; i < ARRAY_SIZE(record_args); i++)
730                 rec_argv[i] = strdup(record_args[i]);
731
732         for (j = 1; j < (unsigned int)argc; j++, i++)
733                 rec_argv[i] = argv[j];
734
735         return cmd_record(i, rec_argv, NULL);
736 }
737
738 int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
739 {
740         const char * const default_sort_order = "frag,hit,bytes";
741         const struct option kmem_options[] = {
742         OPT_STRING('i', "input", &input_name, "file", "input file name"),
743         OPT_CALLBACK_NOOPT(0, "caller", NULL, NULL,
744                            "show per-callsite statistics", parse_caller_opt),
745         OPT_CALLBACK_NOOPT(0, "alloc", NULL, NULL,
746                            "show per-allocation statistics", parse_alloc_opt),
747         OPT_CALLBACK('s', "sort", NULL, "key[,key2...]",
748                      "sort by keys: ptr, call_site, bytes, hit, pingpong, frag",
749                      parse_sort_opt),
750         OPT_CALLBACK('l', "line", NULL, "num", "show n lines", parse_line_opt),
751         OPT_BOOLEAN(0, "raw-ip", &raw_ip, "show raw ip instead of symbol"),
752         OPT_END()
753         };
754         const char * const kmem_usage[] = {
755                 "perf kmem [<options>] {record|stat}",
756                 NULL
757         };
758         argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);
759
760         if (!argc)
761                 usage_with_options(kmem_usage, kmem_options);
762
763         symbol__init();
764
765         if (!strncmp(argv[0], "rec", 3)) {
766                 return __cmd_record(argc, argv);
767         } else if (!strcmp(argv[0], "stat")) {
768                 if (setup_cpunode_map())
769                         return -1;
770
771                 if (list_empty(&caller_sort))
772                         setup_sorting(&caller_sort, default_sort_order);
773                 if (list_empty(&alloc_sort))
774                         setup_sorting(&alloc_sort, default_sort_order);
775
776                 return __cmd_kmem();
777         } else
778                 usage_with_options(kmem_usage, kmem_options);
779
780         return 0;
781 }
782