slub: another slabinfo fix
[linux-2.6.git] / Documentation / vm / slabinfo.c
1 /*
2  * Slabinfo: Tool to get reports about slabs
3  *
4  * (C) 2007 sgi, Christoph Lameter <clameter@sgi.com>
5  *
6  * Compile by:
7  *
8  * gcc -o slabinfo slabinfo.c
9  */
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <sys/types.h>
13 #include <dirent.h>
14 #include <string.h>
15 #include <unistd.h>
16 #include <stdarg.h>
17 #include <getopt.h>
18 #include <regex.h>
19 #include <errno.h>
20
21 #define MAX_SLABS 500
22 #define MAX_ALIASES 500
23 #define MAX_NODES 1024
24
25 struct slabinfo {
26         char *name;
27         int alias;
28         int refs;
29         int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
30         int hwcache_align, object_size, objs_per_slab;
31         int sanity_checks, slab_size, store_user, trace;
32         int order, poison, reclaim_account, red_zone;
33         unsigned long partial, objects, slabs;
34         int numa[MAX_NODES];
35         int numa_partial[MAX_NODES];
36 } slabinfo[MAX_SLABS];
37
38 struct aliasinfo {
39         char *name;
40         char *ref;
41         struct slabinfo *slab;
42 } aliasinfo[MAX_ALIASES];
43
44 int slabs = 0;
45 int actual_slabs = 0;
46 int aliases = 0;
47 int alias_targets = 0;
48 int highest_node = 0;
49
50 char buffer[4096];
51
52 int show_empty = 0;
53 int show_report = 0;
54 int show_alias = 0;
55 int show_slab = 0;
56 int skip_zero = 1;
57 int show_numa = 0;
58 int show_track = 0;
59 int show_first_alias = 0;
60 int validate = 0;
61 int shrink = 0;
62 int show_inverted = 0;
63 int show_single_ref = 0;
64 int show_totals = 0;
65 int sort_size = 0;
66 int set_debug = 0;
67 int show_ops = 0;
68
69 /* Debug options */
70 int sanity = 0;
71 int redzone = 0;
72 int poison = 0;
73 int tracking = 0;
74 int tracing = 0;
75
76 int page_size;
77
78 regex_t pattern;
79
80 void fatal(const char *x, ...)
81 {
82         va_list ap;
83
84         va_start(ap, x);
85         vfprintf(stderr, x, ap);
86         va_end(ap);
87         exit(1);
88 }
89
90 void usage(void)
91 {
92         printf("slabinfo 5/7/2007. (c) 2007 sgi. clameter@sgi.com\n\n"
93                 "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
94                 "-a|--aliases           Show aliases\n"
95                 "-d<options>|--debug=<options> Set/Clear Debug options\n"
96                 "-e|--empty             Show empty slabs\n"
97                 "-f|--first-alias       Show first alias\n"
98                 "-h|--help              Show usage information\n"
99                 "-i|--inverted          Inverted list\n"
100                 "-l|--slabs             Show slabs\n"
101                 "-n|--numa              Show NUMA information\n"
102                 "-o|--ops               Show kmem_cache_ops\n"
103                 "-s|--shrink            Shrink slabs\n"
104                 "-r|--report            Detailed report on single slabs\n"
105                 "-S|--Size              Sort by size\n"
106                 "-t|--tracking          Show alloc/free information\n"
107                 "-T|--Totals            Show summary information\n"
108                 "-v|--validate          Validate slabs\n"
109                 "-z|--zero              Include empty slabs\n"
110                 "-1|--1ref              Single reference\n"
111                 "\nValid debug options (FZPUT may be combined)\n"
112                 "a / A          Switch on all debug options (=FZUP)\n"
113                 "-              Switch off all debug options\n"
114                 "f / F          Sanity Checks (SLAB_DEBUG_FREE)\n"
115                 "z / Z          Redzoning\n"
116                 "p / P          Poisoning\n"
117                 "u / U          Tracking\n"
118                 "t / T          Tracing\n"
119         );
120 }
121
122 unsigned long read_obj(char *name)
123 {
124         FILE *f = fopen(name, "r");
125
126         if (!f)
127                 buffer[0] = 0;
128         else {
129                 if (!fgets(buffer,sizeof(buffer), f))
130                         buffer[0] = 0;
131                 fclose(f);
132                 if (buffer[strlen(buffer)] == '\n')
133                         buffer[strlen(buffer)] = 0;
134         }
135         return strlen(buffer);
136 }
137
138
139 /*
140  * Get the contents of an attribute
141  */
142 unsigned long get_obj(char *name)
143 {
144         if (!read_obj(name))
145                 return 0;
146
147         return atol(buffer);
148 }
149
150 unsigned long get_obj_and_str(char *name, char **x)
151 {
152         unsigned long result = 0;
153         char *p;
154
155         *x = NULL;
156
157         if (!read_obj(name)) {
158                 x = NULL;
159                 return 0;
160         }
161         result = strtoul(buffer, &p, 10);
162         while (*p == ' ')
163                 p++;
164         if (*p)
165                 *x = strdup(p);
166         return result;
167 }
168
169 void set_obj(struct slabinfo *s, char *name, int n)
170 {
171         char x[100];
172         FILE *f;
173
174         sprintf(x, "%s/%s", s->name, name);
175         f = fopen(x, "w");
176         if (!f)
177                 fatal("Cannot write to %s\n", x);
178
179         fprintf(f, "%d\n", n);
180         fclose(f);
181 }
182
183 unsigned long read_slab_obj(struct slabinfo *s, char *name)
184 {
185         char x[100];
186         FILE *f;
187         int l;
188
189         sprintf(x, "%s/%s", s->name, name);
190         f = fopen(x, "r");
191         if (!f) {
192                 buffer[0] = 0;
193                 l = 0;
194         } else {
195                 l = fread(buffer, 1, sizeof(buffer), f);
196                 buffer[l] = 0;
197                 fclose(f);
198         }
199         return l;
200 }
201
202
203 /*
204  * Put a size string together
205  */
206 int store_size(char *buffer, unsigned long value)
207 {
208         unsigned long divisor = 1;
209         char trailer = 0;
210         int n;
211
212         if (value > 1000000000UL) {
213                 divisor = 100000000UL;
214                 trailer = 'G';
215         } else if (value > 1000000UL) {
216                 divisor = 100000UL;
217                 trailer = 'M';
218         } else if (value > 1000UL) {
219                 divisor = 100;
220                 trailer = 'K';
221         }
222
223         value /= divisor;
224         n = sprintf(buffer, "%ld",value);
225         if (trailer) {
226                 buffer[n] = trailer;
227                 n++;
228                 buffer[n] = 0;
229         }
230         if (divisor != 1) {
231                 memmove(buffer + n - 2, buffer + n - 3, 4);
232                 buffer[n-2] = '.';
233                 n++;
234         }
235         return n;
236 }
237
238 void decode_numa_list(int *numa, char *t)
239 {
240         int node;
241         int nr;
242
243         memset(numa, 0, MAX_NODES * sizeof(int));
244
245         if (!t)
246                 return;
247
248         while (*t == 'N') {
249                 t++;
250                 node = strtoul(t, &t, 10);
251                 if (*t == '=') {
252                         t++;
253                         nr = strtoul(t, &t, 10);
254                         numa[node] = nr;
255                         if (node > highest_node)
256                                 highest_node = node;
257                 }
258                 while (*t == ' ')
259                         t++;
260         }
261 }
262
263 void slab_validate(struct slabinfo *s)
264 {
265         if (strcmp(s->name, "*") == 0)
266                 return;
267
268         set_obj(s, "validate", 1);
269 }
270
271 void slab_shrink(struct slabinfo *s)
272 {
273         if (strcmp(s->name, "*") == 0)
274                 return;
275
276         set_obj(s, "shrink", 1);
277 }
278
279 int line = 0;
280
281 void first_line(void)
282 {
283         printf("Name                   Objects Objsize    Space "
284                 "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
285 }
286
287 /*
288  * Find the shortest alias of a slab
289  */
290 struct aliasinfo *find_one_alias(struct slabinfo *find)
291 {
292         struct aliasinfo *a;
293         struct aliasinfo *best = NULL;
294
295         for(a = aliasinfo;a < aliasinfo + aliases; a++) {
296                 if (a->slab == find &&
297                         (!best || strlen(best->name) < strlen(a->name))) {
298                                 best = a;
299                                 if (strncmp(a->name,"kmall", 5) == 0)
300                                         return best;
301                         }
302         }
303         return best;
304 }
305
306 unsigned long slab_size(struct slabinfo *s)
307 {
308         return  s->slabs * (page_size << s->order);
309 }
310
311 void slab_numa(struct slabinfo *s, int mode)
312 {
313         int node;
314
315         if (strcmp(s->name, "*") == 0)
316                 return;
317
318         if (!highest_node) {
319                 printf("\n%s: No NUMA information available.\n", s->name);
320                 return;
321         }
322
323         if (skip_zero && !s->slabs)
324                 return;
325
326         if (!line) {
327                 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
328                 for(node = 0; node <= highest_node; node++)
329                         printf(" %4d", node);
330                 printf("\n----------------------");
331                 for(node = 0; node <= highest_node; node++)
332                         printf("-----");
333                 printf("\n");
334         }
335         printf("%-21s ", mode ? "All slabs" : s->name);
336         for(node = 0; node <= highest_node; node++) {
337                 char b[20];
338
339                 store_size(b, s->numa[node]);
340                 printf(" %4s", b);
341         }
342         printf("\n");
343         if (mode) {
344                 printf("%-21s ", "Partial slabs");
345                 for(node = 0; node <= highest_node; node++) {
346                         char b[20];
347
348                         store_size(b, s->numa_partial[node]);
349                         printf(" %4s", b);
350                 }
351                 printf("\n");
352         }
353         line++;
354 }
355
356 void show_tracking(struct slabinfo *s)
357 {
358         printf("\n%s: Kernel object allocation\n", s->name);
359         printf("-----------------------------------------------------------------------\n");
360         if (read_slab_obj(s, "alloc_calls"))
361                 printf(buffer);
362         else
363                 printf("No Data\n");
364
365         printf("\n%s: Kernel object freeing\n", s->name);
366         printf("------------------------------------------------------------------------\n");
367         if (read_slab_obj(s, "free_calls"))
368                 printf(buffer);
369         else
370                 printf("No Data\n");
371
372 }
373
374 void ops(struct slabinfo *s)
375 {
376         if (strcmp(s->name, "*") == 0)
377                 return;
378
379         if (read_slab_obj(s, "ops")) {
380                 printf("\n%s: kmem_cache operations\n", s->name);
381                 printf("--------------------------------------------\n");
382                 printf(buffer);
383         } else
384                 printf("\n%s has no kmem_cache operations\n", s->name);
385 }
386
387 const char *onoff(int x)
388 {
389         if (x)
390                 return "On ";
391         return "Off";
392 }
393
394 void report(struct slabinfo *s)
395 {
396         if (strcmp(s->name, "*") == 0)
397                 return;
398
399         printf("\nSlabcache: %-20s  Aliases: %2d Order : %2d Objects: %d\n",
400                 s->name, s->aliases, s->order, s->objects);
401         if (s->hwcache_align)
402                 printf("** Hardware cacheline aligned\n");
403         if (s->cache_dma)
404                 printf("** Memory is allocated in a special DMA zone\n");
405         if (s->destroy_by_rcu)
406                 printf("** Slabs are destroyed via RCU\n");
407         if (s->reclaim_account)
408                 printf("** Reclaim accounting active\n");
409
410         printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
411         printf("------------------------------------------------------------------------\n");
412         printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
413                         s->object_size, s->slabs, onoff(s->sanity_checks),
414                         s->slabs * (page_size << s->order));
415         printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
416                         s->slab_size, s->slabs - s->partial - s->cpu_slabs,
417                         onoff(s->red_zone), s->objects * s->object_size);
418         printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
419                         page_size << s->order, s->partial, onoff(s->poison),
420                         s->slabs * (page_size << s->order) - s->objects * s->object_size);
421         printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
422                         s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
423                         (s->slab_size - s->object_size) * s->objects);
424         printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
425                         s->align, s->objs_per_slab, onoff(s->trace),
426                         ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
427                         s->slabs);
428
429         ops(s);
430         show_tracking(s);
431         slab_numa(s, 1);
432 }
433
434 void slabcache(struct slabinfo *s)
435 {
436         char size_str[20];
437         char dist_str[40];
438         char flags[20];
439         char *p = flags;
440
441         if (strcmp(s->name, "*") == 0)
442                 return;
443
444         if (actual_slabs == 1) {
445                 report(s);
446                 return;
447         }
448
449         if (skip_zero && !show_empty && !s->slabs)
450                 return;
451
452         if (show_empty && s->slabs)
453                 return;
454
455         store_size(size_str, slab_size(s));
456         sprintf(dist_str,"%lu/%lu/%d", s->slabs, s->partial, s->cpu_slabs);
457
458         if (!line++)
459                 first_line();
460
461         if (s->aliases)
462                 *p++ = '*';
463         if (s->cache_dma)
464                 *p++ = 'd';
465         if (s->hwcache_align)
466                 *p++ = 'A';
467         if (s->poison)
468                 *p++ = 'P';
469         if (s->reclaim_account)
470                 *p++ = 'a';
471         if (s->red_zone)
472                 *p++ = 'Z';
473         if (s->sanity_checks)
474                 *p++ = 'F';
475         if (s->store_user)
476                 *p++ = 'U';
477         if (s->trace)
478                 *p++ = 'T';
479
480         *p = 0;
481         printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
482                 s->name, s->objects, s->object_size, size_str, dist_str,
483                 s->objs_per_slab, s->order,
484                 s->slabs ? (s->partial * 100) / s->slabs : 100,
485                 s->slabs ? (s->objects * s->object_size * 100) /
486                         (s->slabs * (page_size << s->order)) : 100,
487                 flags);
488 }
489
490 /*
491  * Analyze debug options. Return false if something is amiss.
492  */
493 int debug_opt_scan(char *opt)
494 {
495         if (!opt || !opt[0] || strcmp(opt, "-") == 0)
496                 return 1;
497
498         if (strcasecmp(opt, "a") == 0) {
499                 sanity = 1;
500                 poison = 1;
501                 redzone = 1;
502                 tracking = 1;
503                 return 1;
504         }
505
506         for ( ; *opt; opt++)
507                 switch (*opt) {
508                 case 'F' : case 'f':
509                         if (sanity)
510                                 return 0;
511                         sanity = 1;
512                         break;
513                 case 'P' : case 'p':
514                         if (poison)
515                                 return 0;
516                         poison = 1;
517                         break;
518
519                 case 'Z' : case 'z':
520                         if (redzone)
521                                 return 0;
522                         redzone = 1;
523                         break;
524
525                 case 'U' : case 'u':
526                         if (tracking)
527                                 return 0;
528                         tracking = 1;
529                         break;
530
531                 case 'T' : case 't':
532                         if (tracing)
533                                 return 0;
534                         tracing = 1;
535                         break;
536                 default:
537                         return 0;
538                 }
539         return 1;
540 }
541
542 int slab_empty(struct slabinfo *s)
543 {
544         if (s->objects > 0)
545                 return 0;
546
547         /*
548          * We may still have slabs even if there are no objects. Shrinking will
549          * remove them.
550          */
551         if (s->slabs != 0)
552                 set_obj(s, "shrink", 1);
553
554         return 1;
555 }
556
557 void slab_debug(struct slabinfo *s)
558 {
559         if (strcmp(s->name, "*") == 0)
560                 return;
561
562         if (sanity && !s->sanity_checks) {
563                 set_obj(s, "sanity", 1);
564         }
565         if (!sanity && s->sanity_checks) {
566                 if (slab_empty(s))
567                         set_obj(s, "sanity", 0);
568                 else
569                         fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
570         }
571         if (redzone && !s->red_zone) {
572                 if (slab_empty(s))
573                         set_obj(s, "red_zone", 1);
574                 else
575                         fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
576         }
577         if (!redzone && s->red_zone) {
578                 if (slab_empty(s))
579                         set_obj(s, "red_zone", 0);
580                 else
581                         fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
582         }
583         if (poison && !s->poison) {
584                 if (slab_empty(s))
585                         set_obj(s, "poison", 1);
586                 else
587                         fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
588         }
589         if (!poison && s->poison) {
590                 if (slab_empty(s))
591                         set_obj(s, "poison", 0);
592                 else
593                         fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
594         }
595         if (tracking && !s->store_user) {
596                 if (slab_empty(s))
597                         set_obj(s, "store_user", 1);
598                 else
599                         fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
600         }
601         if (!tracking && s->store_user) {
602                 if (slab_empty(s))
603                         set_obj(s, "store_user", 0);
604                 else
605                         fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
606         }
607         if (tracing && !s->trace) {
608                 if (slabs == 1)
609                         set_obj(s, "trace", 1);
610                 else
611                         fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
612         }
613         if (!tracing && s->trace)
614                 set_obj(s, "trace", 1);
615 }
616
617 void totals(void)
618 {
619         struct slabinfo *s;
620
621         int used_slabs = 0;
622         char b1[20], b2[20], b3[20], b4[20];
623         unsigned long long max = 1ULL << 63;
624
625         /* Object size */
626         unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
627
628         /* Number of partial slabs in a slabcache */
629         unsigned long long min_partial = max, max_partial = 0,
630                                 avg_partial, total_partial = 0;
631
632         /* Number of slabs in a slab cache */
633         unsigned long long min_slabs = max, max_slabs = 0,
634                                 avg_slabs, total_slabs = 0;
635
636         /* Size of the whole slab */
637         unsigned long long min_size = max, max_size = 0,
638                                 avg_size, total_size = 0;
639
640         /* Bytes used for object storage in a slab */
641         unsigned long long min_used = max, max_used = 0,
642                                 avg_used, total_used = 0;
643
644         /* Waste: Bytes used for alignment and padding */
645         unsigned long long min_waste = max, max_waste = 0,
646                                 avg_waste, total_waste = 0;
647         /* Number of objects in a slab */
648         unsigned long long min_objects = max, max_objects = 0,
649                                 avg_objects, total_objects = 0;
650         /* Waste per object */
651         unsigned long long min_objwaste = max,
652                                 max_objwaste = 0, avg_objwaste,
653                                 total_objwaste = 0;
654
655         /* Memory per object */
656         unsigned long long min_memobj = max,
657                                 max_memobj = 0, avg_memobj,
658                                 total_objsize = 0;
659
660         /* Percentage of partial slabs per slab */
661         unsigned long min_ppart = 100, max_ppart = 0,
662                                 avg_ppart, total_ppart = 0;
663
664         /* Number of objects in partial slabs */
665         unsigned long min_partobj = max, max_partobj = 0,
666                                 avg_partobj, total_partobj = 0;
667
668         /* Percentage of partial objects of all objects in a slab */
669         unsigned long min_ppartobj = 100, max_ppartobj = 0,
670                                 avg_ppartobj, total_ppartobj = 0;
671
672
673         for (s = slabinfo; s < slabinfo + slabs; s++) {
674                 unsigned long long size;
675                 unsigned long used;
676                 unsigned long long wasted;
677                 unsigned long long objwaste;
678                 long long objects_in_partial_slabs;
679                 unsigned long percentage_partial_slabs;
680                 unsigned long percentage_partial_objs;
681
682                 if (!s->slabs || !s->objects)
683                         continue;
684
685                 used_slabs++;
686
687                 size = slab_size(s);
688                 used = s->objects * s->object_size;
689                 wasted = size - used;
690                 objwaste = s->slab_size - s->object_size;
691
692                 objects_in_partial_slabs = s->objects -
693                         (s->slabs - s->partial - s ->cpu_slabs) *
694                         s->objs_per_slab;
695
696                 if (objects_in_partial_slabs < 0)
697                         objects_in_partial_slabs = 0;
698
699                 percentage_partial_slabs = s->partial * 100 / s->slabs;
700                 if (percentage_partial_slabs > 100)
701                         percentage_partial_slabs = 100;
702
703                 percentage_partial_objs = objects_in_partial_slabs * 100
704                                                         / s->objects;
705
706                 if (percentage_partial_objs > 100)
707                         percentage_partial_objs = 100;
708
709                 if (s->object_size < min_objsize)
710                         min_objsize = s->object_size;
711                 if (s->partial < min_partial)
712                         min_partial = s->partial;
713                 if (s->slabs < min_slabs)
714                         min_slabs = s->slabs;
715                 if (size < min_size)
716                         min_size = size;
717                 if (wasted < min_waste)
718                         min_waste = wasted;
719                 if (objwaste < min_objwaste)
720                         min_objwaste = objwaste;
721                 if (s->objects < min_objects)
722                         min_objects = s->objects;
723                 if (used < min_used)
724                         min_used = used;
725                 if (objects_in_partial_slabs < min_partobj)
726                         min_partobj = objects_in_partial_slabs;
727                 if (percentage_partial_slabs < min_ppart)
728                         min_ppart = percentage_partial_slabs;
729                 if (percentage_partial_objs < min_ppartobj)
730                         min_ppartobj = percentage_partial_objs;
731                 if (s->slab_size < min_memobj)
732                         min_memobj = s->slab_size;
733
734                 if (s->object_size > max_objsize)
735                         max_objsize = s->object_size;
736                 if (s->partial > max_partial)
737                         max_partial = s->partial;
738                 if (s->slabs > max_slabs)
739                         max_slabs = s->slabs;
740                 if (size > max_size)
741                         max_size = size;
742                 if (wasted > max_waste)
743                         max_waste = wasted;
744                 if (objwaste > max_objwaste)
745                         max_objwaste = objwaste;
746                 if (s->objects > max_objects)
747                         max_objects = s->objects;
748                 if (used > max_used)
749                         max_used = used;
750                 if (objects_in_partial_slabs > max_partobj)
751                         max_partobj = objects_in_partial_slabs;
752                 if (percentage_partial_slabs > max_ppart)
753                         max_ppart = percentage_partial_slabs;
754                 if (percentage_partial_objs > max_ppartobj)
755                         max_ppartobj = percentage_partial_objs;
756                 if (s->slab_size > max_memobj)
757                         max_memobj = s->slab_size;
758
759                 total_partial += s->partial;
760                 total_slabs += s->slabs;
761                 total_size += size;
762                 total_waste += wasted;
763
764                 total_objects += s->objects;
765                 total_used += used;
766                 total_partobj += objects_in_partial_slabs;
767                 total_ppart += percentage_partial_slabs;
768                 total_ppartobj += percentage_partial_objs;
769
770                 total_objwaste += s->objects * objwaste;
771                 total_objsize += s->objects * s->slab_size;
772         }
773
774         if (!total_objects) {
775                 printf("No objects\n");
776                 return;
777         }
778         if (!used_slabs) {
779                 printf("No slabs\n");
780                 return;
781         }
782
783         /* Per slab averages */
784         avg_partial = total_partial / used_slabs;
785         avg_slabs = total_slabs / used_slabs;
786         avg_size = total_size / used_slabs;
787         avg_waste = total_waste / used_slabs;
788
789         avg_objects = total_objects / used_slabs;
790         avg_used = total_used / used_slabs;
791         avg_partobj = total_partobj / used_slabs;
792         avg_ppart = total_ppart / used_slabs;
793         avg_ppartobj = total_ppartobj / used_slabs;
794
795         /* Per object object sizes */
796         avg_objsize = total_used / total_objects;
797         avg_objwaste = total_objwaste / total_objects;
798         avg_partobj = total_partobj * 100 / total_objects;
799         avg_memobj = total_objsize / total_objects;
800
801         printf("Slabcache Totals\n");
802         printf("----------------\n");
803         printf("Slabcaches : %3d      Aliases  : %3d->%-3d Active: %3d\n",
804                         slabs, aliases, alias_targets, used_slabs);
805
806         store_size(b1, total_size);store_size(b2, total_waste);
807         store_size(b3, total_waste * 100 / total_used);
808         printf("Memory used: %6s   # Loss   : %6s   MRatio:%6s%%\n", b1, b2, b3);
809
810         store_size(b1, total_objects);store_size(b2, total_partobj);
811         store_size(b3, total_partobj * 100 / total_objects);
812         printf("# Objects  : %6s   # PartObj: %6s   ORatio:%6s%%\n", b1, b2, b3);
813
814         printf("\n");
815         printf("Per Cache    Average         Min         Max       Total\n");
816         printf("---------------------------------------------------------\n");
817
818         store_size(b1, avg_objects);store_size(b2, min_objects);
819         store_size(b3, max_objects);store_size(b4, total_objects);
820         printf("#Objects  %10s  %10s  %10s  %10s\n",
821                         b1,     b2,     b3,     b4);
822
823         store_size(b1, avg_slabs);store_size(b2, min_slabs);
824         store_size(b3, max_slabs);store_size(b4, total_slabs);
825         printf("#Slabs    %10s  %10s  %10s  %10s\n",
826                         b1,     b2,     b3,     b4);
827
828         store_size(b1, avg_partial);store_size(b2, min_partial);
829         store_size(b3, max_partial);store_size(b4, total_partial);
830         printf("#PartSlab %10s  %10s  %10s  %10s\n",
831                         b1,     b2,     b3,     b4);
832         store_size(b1, avg_ppart);store_size(b2, min_ppart);
833         store_size(b3, max_ppart);
834         store_size(b4, total_partial * 100  / total_slabs);
835         printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
836                         b1,     b2,     b3,     b4);
837
838         store_size(b1, avg_partobj);store_size(b2, min_partobj);
839         store_size(b3, max_partobj);
840         store_size(b4, total_partobj);
841         printf("PartObjs  %10s  %10s  %10s  %10s\n",
842                         b1,     b2,     b3,     b4);
843
844         store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
845         store_size(b3, max_ppartobj);
846         store_size(b4, total_partobj * 100 / total_objects);
847         printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
848                         b1,     b2,     b3,     b4);
849
850         store_size(b1, avg_size);store_size(b2, min_size);
851         store_size(b3, max_size);store_size(b4, total_size);
852         printf("Memory    %10s  %10s  %10s  %10s\n",
853                         b1,     b2,     b3,     b4);
854
855         store_size(b1, avg_used);store_size(b2, min_used);
856         store_size(b3, max_used);store_size(b4, total_used);
857         printf("Used      %10s  %10s  %10s  %10s\n",
858                         b1,     b2,     b3,     b4);
859
860         store_size(b1, avg_waste);store_size(b2, min_waste);
861         store_size(b3, max_waste);store_size(b4, total_waste);
862         printf("Loss      %10s  %10s  %10s  %10s\n",
863                         b1,     b2,     b3,     b4);
864
865         printf("\n");
866         printf("Per Object   Average         Min         Max\n");
867         printf("---------------------------------------------\n");
868
869         store_size(b1, avg_memobj);store_size(b2, min_memobj);
870         store_size(b3, max_memobj);
871         printf("Memory    %10s  %10s  %10s\n",
872                         b1,     b2,     b3);
873         store_size(b1, avg_objsize);store_size(b2, min_objsize);
874         store_size(b3, max_objsize);
875         printf("User      %10s  %10s  %10s\n",
876                         b1,     b2,     b3);
877
878         store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
879         store_size(b3, max_objwaste);
880         printf("Loss      %10s  %10s  %10s\n",
881                         b1,     b2,     b3);
882 }
883
884 void sort_slabs(void)
885 {
886         struct slabinfo *s1,*s2;
887
888         for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
889                 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
890                         int result;
891
892                         if (sort_size)
893                                 result = slab_size(s1) < slab_size(s2);
894                         else
895                                 result = strcasecmp(s1->name, s2->name);
896
897                         if (show_inverted)
898                                 result = -result;
899
900                         if (result > 0) {
901                                 struct slabinfo t;
902
903                                 memcpy(&t, s1, sizeof(struct slabinfo));
904                                 memcpy(s1, s2, sizeof(struct slabinfo));
905                                 memcpy(s2, &t, sizeof(struct slabinfo));
906                         }
907                 }
908         }
909 }
910
911 void sort_aliases(void)
912 {
913         struct aliasinfo *a1,*a2;
914
915         for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
916                 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
917                         char *n1, *n2;
918
919                         n1 = a1->name;
920                         n2 = a2->name;
921                         if (show_alias && !show_inverted) {
922                                 n1 = a1->ref;
923                                 n2 = a2->ref;
924                         }
925                         if (strcasecmp(n1, n2) > 0) {
926                                 struct aliasinfo t;
927
928                                 memcpy(&t, a1, sizeof(struct aliasinfo));
929                                 memcpy(a1, a2, sizeof(struct aliasinfo));
930                                 memcpy(a2, &t, sizeof(struct aliasinfo));
931                         }
932                 }
933         }
934 }
935
936 void link_slabs(void)
937 {
938         struct aliasinfo *a;
939         struct slabinfo *s;
940
941         for (a = aliasinfo; a < aliasinfo + aliases; a++) {
942
943                 for (s = slabinfo; s < slabinfo + slabs; s++)
944                         if (strcmp(a->ref, s->name) == 0) {
945                                 a->slab = s;
946                                 s->refs++;
947                                 break;
948                         }
949                 if (s == slabinfo + slabs)
950                         fatal("Unresolved alias %s\n", a->ref);
951         }
952 }
953
954 void alias(void)
955 {
956         struct aliasinfo *a;
957         char *active = NULL;
958
959         sort_aliases();
960         link_slabs();
961
962         for(a = aliasinfo; a < aliasinfo + aliases; a++) {
963
964                 if (!show_single_ref && a->slab->refs == 1)
965                         continue;
966
967                 if (!show_inverted) {
968                         if (active) {
969                                 if (strcmp(a->slab->name, active) == 0) {
970                                         printf(" %s", a->name);
971                                         continue;
972                                 }
973                         }
974                         printf("\n%-12s <- %s", a->slab->name, a->name);
975                         active = a->slab->name;
976                 }
977                 else
978                         printf("%-20s -> %s\n", a->name, a->slab->name);
979         }
980         if (active)
981                 printf("\n");
982 }
983
984
985 void rename_slabs(void)
986 {
987         struct slabinfo *s;
988         struct aliasinfo *a;
989
990         for (s = slabinfo; s < slabinfo + slabs; s++) {
991                 if (*s->name != ':')
992                         continue;
993
994                 if (s->refs > 1 && !show_first_alias)
995                         continue;
996
997                 a = find_one_alias(s);
998
999                 if (a)
1000                         s->name = a->name;
1001                 else {
1002                         s->name = "*";
1003                         actual_slabs--;
1004                 }
1005         }
1006 }
1007
1008 int slab_mismatch(char *slab)
1009 {
1010         return regexec(&pattern, slab, 0, NULL, 0);
1011 }
1012
1013 void read_slab_dir(void)
1014 {
1015         DIR *dir;
1016         struct dirent *de;
1017         struct slabinfo *slab = slabinfo;
1018         struct aliasinfo *alias = aliasinfo;
1019         char *p;
1020         char *t;
1021         int count;
1022
1023         if (chdir("/sys/slab"))
1024                 fatal("SYSFS support for SLUB not active\n");
1025
1026         dir = opendir(".");
1027         while ((de = readdir(dir))) {
1028                 if (de->d_name[0] == '.' ||
1029                         (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1030                                 continue;
1031                 switch (de->d_type) {
1032                    case DT_LNK:
1033                         alias->name = strdup(de->d_name);
1034                         count = readlink(de->d_name, buffer, sizeof(buffer));
1035
1036                         if (count < 0)
1037                                 fatal("Cannot read symlink %s\n", de->d_name);
1038
1039                         buffer[count] = 0;
1040                         p = buffer + count;
1041                         while (p > buffer && p[-1] != '/')
1042                                 p--;
1043                         alias->ref = strdup(p);
1044                         alias++;
1045                         break;
1046                    case DT_DIR:
1047                         if (chdir(de->d_name))
1048                                 fatal("Unable to access slab %s\n", slab->name);
1049                         slab->name = strdup(de->d_name);
1050                         slab->alias = 0;
1051                         slab->refs = 0;
1052                         slab->aliases = get_obj("aliases");
1053                         slab->align = get_obj("align");
1054                         slab->cache_dma = get_obj("cache_dma");
1055                         slab->cpu_slabs = get_obj("cpu_slabs");
1056                         slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1057                         slab->hwcache_align = get_obj("hwcache_align");
1058                         slab->object_size = get_obj("object_size");
1059                         slab->objects = get_obj("objects");
1060                         slab->objs_per_slab = get_obj("objs_per_slab");
1061                         slab->order = get_obj("order");
1062                         slab->partial = get_obj("partial");
1063                         slab->partial = get_obj_and_str("partial", &t);
1064                         decode_numa_list(slab->numa_partial, t);
1065                         slab->poison = get_obj("poison");
1066                         slab->reclaim_account = get_obj("reclaim_account");
1067                         slab->red_zone = get_obj("red_zone");
1068                         slab->sanity_checks = get_obj("sanity_checks");
1069                         slab->slab_size = get_obj("slab_size");
1070                         slab->slabs = get_obj_and_str("slabs", &t);
1071                         decode_numa_list(slab->numa, t);
1072                         slab->store_user = get_obj("store_user");
1073                         slab->trace = get_obj("trace");
1074                         chdir("..");
1075                         if (slab->name[0] == ':')
1076                                 alias_targets++;
1077                         slab++;
1078                         break;
1079                    default :
1080                         fatal("Unknown file type %lx\n", de->d_type);
1081                 }
1082         }
1083         closedir(dir);
1084         slabs = slab - slabinfo;
1085         actual_slabs = slabs;
1086         aliases = alias - aliasinfo;
1087         if (slabs > MAX_SLABS)
1088                 fatal("Too many slabs\n");
1089         if (aliases > MAX_ALIASES)
1090                 fatal("Too many aliases\n");
1091 }
1092
1093 void output_slabs(void)
1094 {
1095         struct slabinfo *slab;
1096
1097         for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
1098
1099                 if (slab->alias)
1100                         continue;
1101
1102
1103                 if (show_numa)
1104                         slab_numa(slab, 0);
1105                 else if (show_track)
1106                         show_tracking(slab);
1107                 else if (validate)
1108                         slab_validate(slab);
1109                 else if (shrink)
1110                         slab_shrink(slab);
1111                 else if (set_debug)
1112                         slab_debug(slab);
1113                 else if (show_ops)
1114                         ops(slab);
1115                 else if (show_slab)
1116                         slabcache(slab);
1117                 else if (show_report)
1118                         report(slab);
1119         }
1120 }
1121
1122 struct option opts[] = {
1123         { "aliases", 0, NULL, 'a' },
1124         { "debug", 2, NULL, 'd' },
1125         { "empty", 0, NULL, 'e' },
1126         { "first-alias", 0, NULL, 'f' },
1127         { "help", 0, NULL, 'h' },
1128         { "inverted", 0, NULL, 'i'},
1129         { "numa", 0, NULL, 'n' },
1130         { "ops", 0, NULL, 'o' },
1131         { "report", 0, NULL, 'r' },
1132         { "shrink", 0, NULL, 's' },
1133         { "slabs", 0, NULL, 'l' },
1134         { "track", 0, NULL, 't'},
1135         { "validate", 0, NULL, 'v' },
1136         { "zero", 0, NULL, 'z' },
1137         { "1ref", 0, NULL, '1'},
1138         { NULL, 0, NULL, 0 }
1139 };
1140
1141 int main(int argc, char *argv[])
1142 {
1143         int c;
1144         int err;
1145         char *pattern_source;
1146
1147         page_size = getpagesize();
1148
1149         while ((c = getopt_long(argc, argv, "ad::efhil1noprstvzTS",
1150                                                 opts, NULL)) != -1)
1151         switch(c) {
1152                 case '1':
1153                         show_single_ref = 1;
1154                         break;
1155                 case 'a':
1156                         show_alias = 1;
1157                         break;
1158                 case 'd':
1159                         set_debug = 1;
1160                         if (!debug_opt_scan(optarg))
1161                                 fatal("Invalid debug option '%s'\n", optarg);
1162                         break;
1163                 case 'e':
1164                         show_empty = 1;
1165                         break;
1166                 case 'f':
1167                         show_first_alias = 1;
1168                         break;
1169                 case 'h':
1170                         usage();
1171                         return 0;
1172                 case 'i':
1173                         show_inverted = 1;
1174                         break;
1175                 case 'n':
1176                         show_numa = 1;
1177                         break;
1178                 case 'o':
1179                         show_ops = 1;
1180                         break;
1181                 case 'r':
1182                         show_report = 1;
1183                         break;
1184                 case 's':
1185                         shrink = 1;
1186                         break;
1187                 case 'l':
1188                         show_slab = 1;
1189                         break;
1190                 case 't':
1191                         show_track = 1;
1192                         break;
1193                 case 'v':
1194                         validate = 1;
1195                         break;
1196                 case 'z':
1197                         skip_zero = 0;
1198                         break;
1199                 case 'T':
1200                         show_totals = 1;
1201                         break;
1202                 case 'S':
1203                         sort_size = 1;
1204                         break;
1205
1206                 default:
1207                         fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1208
1209         }
1210
1211         if (!show_slab && !show_alias && !show_track && !show_report
1212                 && !validate && !shrink && !set_debug && !show_ops)
1213                         show_slab = 1;
1214
1215         if (argc > optind)
1216                 pattern_source = argv[optind];
1217         else
1218                 pattern_source = ".*";
1219
1220         err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1221         if (err)
1222                 fatal("%s: Invalid pattern '%s' code %d\n",
1223                         argv[0], pattern_source, err);
1224         read_slab_dir();
1225         if (show_alias)
1226                 alias();
1227         else
1228         if (show_totals)
1229                 totals();
1230         else {
1231                 link_slabs();
1232                 rename_slabs();
1233                 sort_slabs();
1234                 output_slabs();
1235         }
1236         return 0;
1237 }