slub: slabinfo update for cmpxchg handling
[linux-2.6.git] / tools / slub / slabinfo.c
1 /*
2  * Slabinfo: Tool to get reports about slabs
3  *
4  * (C) 2007 sgi, Christoph Lameter
5  * (C) 2011 Linux Foundation, Christoph Lameter
6  *
7  * Compile with:
8  *
9  * gcc -o slabinfo slabinfo.c
10  */
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <sys/types.h>
14 #include <dirent.h>
15 #include <strings.h>
16 #include <string.h>
17 #include <unistd.h>
18 #include <stdarg.h>
19 #include <getopt.h>
20 #include <regex.h>
21 #include <errno.h>
22
23 #define MAX_SLABS 500
24 #define MAX_ALIASES 500
25 #define MAX_NODES 1024
26
27 struct slabinfo {
28         char *name;
29         int alias;
30         int refs;
31         int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
32         int hwcache_align, object_size, objs_per_slab;
33         int sanity_checks, slab_size, store_user, trace;
34         int order, poison, reclaim_account, red_zone;
35         unsigned long partial, objects, slabs, objects_partial, objects_total;
36         unsigned long alloc_fastpath, alloc_slowpath;
37         unsigned long free_fastpath, free_slowpath;
38         unsigned long free_frozen, free_add_partial, free_remove_partial;
39         unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
40         unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
41         unsigned long deactivate_to_head, deactivate_to_tail;
42         unsigned long deactivate_remote_frees, order_fallback;
43         unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
44         unsigned long alloc_node_mismatch, deactivate_bypass;
45         int numa[MAX_NODES];
46         int numa_partial[MAX_NODES];
47 } slabinfo[MAX_SLABS];
48
49 struct aliasinfo {
50         char *name;
51         char *ref;
52         struct slabinfo *slab;
53 } aliasinfo[MAX_ALIASES];
54
55 int slabs = 0;
56 int actual_slabs = 0;
57 int aliases = 0;
58 int alias_targets = 0;
59 int highest_node = 0;
60
61 char buffer[4096];
62
63 int show_empty = 0;
64 int show_report = 0;
65 int show_alias = 0;
66 int show_slab = 0;
67 int skip_zero = 1;
68 int show_numa = 0;
69 int show_track = 0;
70 int show_first_alias = 0;
71 int validate = 0;
72 int shrink = 0;
73 int show_inverted = 0;
74 int show_single_ref = 0;
75 int show_totals = 0;
76 int sort_size = 0;
77 int sort_active = 0;
78 int set_debug = 0;
79 int show_ops = 0;
80 int show_activity = 0;
81
82 /* Debug options */
83 int sanity = 0;
84 int redzone = 0;
85 int poison = 0;
86 int tracking = 0;
87 int tracing = 0;
88
89 int page_size;
90
91 regex_t pattern;
92
93 static void fatal(const char *x, ...)
94 {
95         va_list ap;
96
97         va_start(ap, x);
98         vfprintf(stderr, x, ap);
99         va_end(ap);
100         exit(EXIT_FAILURE);
101 }
102
103 static void usage(void)
104 {
105         printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
106                 "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
107                 "-a|--aliases           Show aliases\n"
108                 "-A|--activity          Most active slabs first\n"
109                 "-d<options>|--debug=<options> Set/Clear Debug options\n"
110                 "-D|--display-active    Switch line format to activity\n"
111                 "-e|--empty             Show empty slabs\n"
112                 "-f|--first-alias       Show first alias\n"
113                 "-h|--help              Show usage information\n"
114                 "-i|--inverted          Inverted list\n"
115                 "-l|--slabs             Show slabs\n"
116                 "-n|--numa              Show NUMA information\n"
117                 "-o|--ops               Show kmem_cache_ops\n"
118                 "-s|--shrink            Shrink slabs\n"
119                 "-r|--report            Detailed report on single slabs\n"
120                 "-S|--Size              Sort by size\n"
121                 "-t|--tracking          Show alloc/free information\n"
122                 "-T|--Totals            Show summary information\n"
123                 "-v|--validate          Validate slabs\n"
124                 "-z|--zero              Include empty slabs\n"
125                 "-1|--1ref              Single reference\n"
126                 "\nValid debug options (FZPUT may be combined)\n"
127                 "a / A          Switch on all debug options (=FZUP)\n"
128                 "-              Switch off all debug options\n"
129                 "f / F          Sanity Checks (SLAB_DEBUG_FREE)\n"
130                 "z / Z          Redzoning\n"
131                 "p / P          Poisoning\n"
132                 "u / U          Tracking\n"
133                 "t / T          Tracing\n"
134         );
135 }
136
137 static unsigned long read_obj(const char *name)
138 {
139         FILE *f = fopen(name, "r");
140
141         if (!f)
142                 buffer[0] = 0;
143         else {
144                 if (!fgets(buffer, sizeof(buffer), f))
145                         buffer[0] = 0;
146                 fclose(f);
147                 if (buffer[strlen(buffer)] == '\n')
148                         buffer[strlen(buffer)] = 0;
149         }
150         return strlen(buffer);
151 }
152
153
154 /*
155  * Get the contents of an attribute
156  */
157 static unsigned long get_obj(const char *name)
158 {
159         if (!read_obj(name))
160                 return 0;
161
162         return atol(buffer);
163 }
164
165 static unsigned long get_obj_and_str(const char *name, char **x)
166 {
167         unsigned long result = 0;
168         char *p;
169
170         *x = NULL;
171
172         if (!read_obj(name)) {
173                 x = NULL;
174                 return 0;
175         }
176         result = strtoul(buffer, &p, 10);
177         while (*p == ' ')
178                 p++;
179         if (*p)
180                 *x = strdup(p);
181         return result;
182 }
183
184 static void set_obj(struct slabinfo *s, const char *name, int n)
185 {
186         char x[100];
187         FILE *f;
188
189         snprintf(x, 100, "%s/%s", s->name, name);
190         f = fopen(x, "w");
191         if (!f)
192                 fatal("Cannot write to %s\n", x);
193
194         fprintf(f, "%d\n", n);
195         fclose(f);
196 }
197
198 static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
199 {
200         char x[100];
201         FILE *f;
202         size_t l;
203
204         snprintf(x, 100, "%s/%s", s->name, name);
205         f = fopen(x, "r");
206         if (!f) {
207                 buffer[0] = 0;
208                 l = 0;
209         } else {
210                 l = fread(buffer, 1, sizeof(buffer), f);
211                 buffer[l] = 0;
212                 fclose(f);
213         }
214         return l;
215 }
216
217
218 /*
219  * Put a size string together
220  */
221 static int store_size(char *buffer, unsigned long value)
222 {
223         unsigned long divisor = 1;
224         char trailer = 0;
225         int n;
226
227         if (value > 1000000000UL) {
228                 divisor = 100000000UL;
229                 trailer = 'G';
230         } else if (value > 1000000UL) {
231                 divisor = 100000UL;
232                 trailer = 'M';
233         } else if (value > 1000UL) {
234                 divisor = 100;
235                 trailer = 'K';
236         }
237
238         value /= divisor;
239         n = sprintf(buffer, "%ld",value);
240         if (trailer) {
241                 buffer[n] = trailer;
242                 n++;
243                 buffer[n] = 0;
244         }
245         if (divisor != 1) {
246                 memmove(buffer + n - 2, buffer + n - 3, 4);
247                 buffer[n-2] = '.';
248                 n++;
249         }
250         return n;
251 }
252
253 static void decode_numa_list(int *numa, char *t)
254 {
255         int node;
256         int nr;
257
258         memset(numa, 0, MAX_NODES * sizeof(int));
259
260         if (!t)
261                 return;
262
263         while (*t == 'N') {
264                 t++;
265                 node = strtoul(t, &t, 10);
266                 if (*t == '=') {
267                         t++;
268                         nr = strtoul(t, &t, 10);
269                         numa[node] = nr;
270                         if (node > highest_node)
271                                 highest_node = node;
272                 }
273                 while (*t == ' ')
274                         t++;
275         }
276 }
277
278 static void slab_validate(struct slabinfo *s)
279 {
280         if (strcmp(s->name, "*") == 0)
281                 return;
282
283         set_obj(s, "validate", 1);
284 }
285
286 static void slab_shrink(struct slabinfo *s)
287 {
288         if (strcmp(s->name, "*") == 0)
289                 return;
290
291         set_obj(s, "shrink", 1);
292 }
293
294 int line = 0;
295
296 static void first_line(void)
297 {
298         if (show_activity)
299                 printf("Name                   Objects      Alloc       Free   %%Fast Fallb O CmpX   UL\n");
300         else
301                 printf("Name                   Objects Objsize    Space "
302                         "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
303 }
304
305 /*
306  * Find the shortest alias of a slab
307  */
308 static struct aliasinfo *find_one_alias(struct slabinfo *find)
309 {
310         struct aliasinfo *a;
311         struct aliasinfo *best = NULL;
312
313         for(a = aliasinfo;a < aliasinfo + aliases; a++) {
314                 if (a->slab == find &&
315                         (!best || strlen(best->name) < strlen(a->name))) {
316                                 best = a;
317                                 if (strncmp(a->name,"kmall", 5) == 0)
318                                         return best;
319                         }
320         }
321         return best;
322 }
323
324 static unsigned long slab_size(struct slabinfo *s)
325 {
326         return  s->slabs * (page_size << s->order);
327 }
328
329 static unsigned long slab_activity(struct slabinfo *s)
330 {
331         return  s->alloc_fastpath + s->free_fastpath +
332                 s->alloc_slowpath + s->free_slowpath;
333 }
334
335 static void slab_numa(struct slabinfo *s, int mode)
336 {
337         int node;
338
339         if (strcmp(s->name, "*") == 0)
340                 return;
341
342         if (!highest_node) {
343                 printf("\n%s: No NUMA information available.\n", s->name);
344                 return;
345         }
346
347         if (skip_zero && !s->slabs)
348                 return;
349
350         if (!line) {
351                 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
352                 for(node = 0; node <= highest_node; node++)
353                         printf(" %4d", node);
354                 printf("\n----------------------");
355                 for(node = 0; node <= highest_node; node++)
356                         printf("-----");
357                 printf("\n");
358         }
359         printf("%-21s ", mode ? "All slabs" : s->name);
360         for(node = 0; node <= highest_node; node++) {
361                 char b[20];
362
363                 store_size(b, s->numa[node]);
364                 printf(" %4s", b);
365         }
366         printf("\n");
367         if (mode) {
368                 printf("%-21s ", "Partial slabs");
369                 for(node = 0; node <= highest_node; node++) {
370                         char b[20];
371
372                         store_size(b, s->numa_partial[node]);
373                         printf(" %4s", b);
374                 }
375                 printf("\n");
376         }
377         line++;
378 }
379
380 static void show_tracking(struct slabinfo *s)
381 {
382         printf("\n%s: Kernel object allocation\n", s->name);
383         printf("-----------------------------------------------------------------------\n");
384         if (read_slab_obj(s, "alloc_calls"))
385                 printf("%s", buffer);
386         else
387                 printf("No Data\n");
388
389         printf("\n%s: Kernel object freeing\n", s->name);
390         printf("------------------------------------------------------------------------\n");
391         if (read_slab_obj(s, "free_calls"))
392                 printf("%s", buffer);
393         else
394                 printf("No Data\n");
395
396 }
397
398 static void ops(struct slabinfo *s)
399 {
400         if (strcmp(s->name, "*") == 0)
401                 return;
402
403         if (read_slab_obj(s, "ops")) {
404                 printf("\n%s: kmem_cache operations\n", s->name);
405                 printf("--------------------------------------------\n");
406                 printf("%s", buffer);
407         } else
408                 printf("\n%s has no kmem_cache operations\n", s->name);
409 }
410
411 static const char *onoff(int x)
412 {
413         if (x)
414                 return "On ";
415         return "Off";
416 }
417
418 static void slab_stats(struct slabinfo *s)
419 {
420         unsigned long total_alloc;
421         unsigned long total_free;
422         unsigned long total;
423
424         if (!s->alloc_slab)
425                 return;
426
427         total_alloc = s->alloc_fastpath + s->alloc_slowpath;
428         total_free = s->free_fastpath + s->free_slowpath;
429
430         if (!total_alloc)
431                 return;
432
433         printf("\n");
434         printf("Slab Perf Counter       Alloc     Free %%Al %%Fr\n");
435         printf("--------------------------------------------------\n");
436         printf("Fastpath             %8lu %8lu %3lu %3lu\n",
437                 s->alloc_fastpath, s->free_fastpath,
438                 s->alloc_fastpath * 100 / total_alloc,
439                 s->free_fastpath * 100 / total_free);
440         printf("Slowpath             %8lu %8lu %3lu %3lu\n",
441                 total_alloc - s->alloc_fastpath, s->free_slowpath,
442                 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
443                 s->free_slowpath * 100 / total_free);
444         printf("Page Alloc           %8lu %8lu %3lu %3lu\n",
445                 s->alloc_slab, s->free_slab,
446                 s->alloc_slab * 100 / total_alloc,
447                 s->free_slab * 100 / total_free);
448         printf("Add partial          %8lu %8lu %3lu %3lu\n",
449                 s->deactivate_to_head + s->deactivate_to_tail,
450                 s->free_add_partial,
451                 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
452                 s->free_add_partial * 100 / total_free);
453         printf("Remove partial       %8lu %8lu %3lu %3lu\n",
454                 s->alloc_from_partial, s->free_remove_partial,
455                 s->alloc_from_partial * 100 / total_alloc,
456                 s->free_remove_partial * 100 / total_free);
457
458         printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
459                 s->deactivate_remote_frees, s->free_frozen,
460                 s->deactivate_remote_frees * 100 / total_alloc,
461                 s->free_frozen * 100 / total_free);
462
463         printf("Total                %8lu %8lu\n\n", total_alloc, total_free);
464
465         if (s->cpuslab_flush)
466                 printf("Flushes %8lu\n", s->cpuslab_flush);
467
468         total = s->deactivate_full + s->deactivate_empty +
469                         s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
470
471         if (total) {
472                 printf("\nSlab Deactivation             Ocurrences  %%\n");
473                 printf("-------------------------------------------------\n");
474                 printf("Slab full                     %7lu  %3lu%%\n",
475                         s->deactivate_full, (s->deactivate_full * 100) / total);
476                 printf("Slab empty                    %7lu  %3lu%%\n",
477                         s->deactivate_empty, (s->deactivate_empty * 100) / total);
478                 printf("Moved to head of partial list %7lu  %3lu%%\n",
479                         s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
480                 printf("Moved to tail of partial list %7lu  %3lu%%\n",
481                         s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
482                 printf("Deactivation bypass           %7lu  %3lu%%\n",
483                         s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
484                 printf("Refilled from foreign frees   %7lu  %3lu%%\n",
485                         s->alloc_refill, (s->alloc_refill * 100) / total);
486                 printf("Node mismatch                 %7lu  %3lu%%\n",
487                         s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
488         }
489
490         if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail)
491                 printf("\nCmpxchg_double Looping\n------------------------\n");
492                 printf("Locked Cmpxchg Double redos   %lu\nUnlocked Cmpxchg Double redos %lu\n",
493                         s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
494 }
495
496 static void report(struct slabinfo *s)
497 {
498         if (strcmp(s->name, "*") == 0)
499                 return;
500
501         printf("\nSlabcache: %-20s  Aliases: %2d Order : %2d Objects: %lu\n",
502                 s->name, s->aliases, s->order, s->objects);
503         if (s->hwcache_align)
504                 printf("** Hardware cacheline aligned\n");
505         if (s->cache_dma)
506                 printf("** Memory is allocated in a special DMA zone\n");
507         if (s->destroy_by_rcu)
508                 printf("** Slabs are destroyed via RCU\n");
509         if (s->reclaim_account)
510                 printf("** Reclaim accounting active\n");
511
512         printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
513         printf("------------------------------------------------------------------------\n");
514         printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
515                         s->object_size, s->slabs, onoff(s->sanity_checks),
516                         s->slabs * (page_size << s->order));
517         printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
518                         s->slab_size, s->slabs - s->partial - s->cpu_slabs,
519                         onoff(s->red_zone), s->objects * s->object_size);
520         printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
521                         page_size << s->order, s->partial, onoff(s->poison),
522                         s->slabs * (page_size << s->order) - s->objects * s->object_size);
523         printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
524                         s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
525                         (s->slab_size - s->object_size) * s->objects);
526         printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
527                         s->align, s->objs_per_slab, onoff(s->trace),
528                         ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
529                         s->slabs);
530
531         ops(s);
532         show_tracking(s);
533         slab_numa(s, 1);
534         slab_stats(s);
535 }
536
537 static void slabcache(struct slabinfo *s)
538 {
539         char size_str[20];
540         char dist_str[40];
541         char flags[20];
542         char *p = flags;
543
544         if (strcmp(s->name, "*") == 0)
545                 return;
546
547         if (actual_slabs == 1) {
548                 report(s);
549                 return;
550         }
551
552         if (skip_zero && !show_empty && !s->slabs)
553                 return;
554
555         if (show_empty && s->slabs)
556                 return;
557
558         store_size(size_str, slab_size(s));
559         snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
560                                                 s->partial, s->cpu_slabs);
561
562         if (!line++)
563                 first_line();
564
565         if (s->aliases)
566                 *p++ = '*';
567         if (s->cache_dma)
568                 *p++ = 'd';
569         if (s->hwcache_align)
570                 *p++ = 'A';
571         if (s->poison)
572                 *p++ = 'P';
573         if (s->reclaim_account)
574                 *p++ = 'a';
575         if (s->red_zone)
576                 *p++ = 'Z';
577         if (s->sanity_checks)
578                 *p++ = 'F';
579         if (s->store_user)
580                 *p++ = 'U';
581         if (s->trace)
582                 *p++ = 'T';
583
584         *p = 0;
585         if (show_activity) {
586                 unsigned long total_alloc;
587                 unsigned long total_free;
588
589                 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
590                 total_free = s->free_fastpath + s->free_slowpath;
591
592                 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
593                         s->name, s->objects,
594                         total_alloc, total_free,
595                         total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
596                         total_free ? (s->free_fastpath * 100 / total_free) : 0,
597                         s->order_fallback, s->order, s->cmpxchg_double_fail,
598                         s->cmpxchg_double_cpu_fail);
599         }
600         else
601                 printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
602                         s->name, s->objects, s->object_size, size_str, dist_str,
603                         s->objs_per_slab, s->order,
604                         s->slabs ? (s->partial * 100) / s->slabs : 100,
605                         s->slabs ? (s->objects * s->object_size * 100) /
606                                 (s->slabs * (page_size << s->order)) : 100,
607                         flags);
608 }
609
610 /*
611  * Analyze debug options. Return false if something is amiss.
612  */
613 static int debug_opt_scan(char *opt)
614 {
615         if (!opt || !opt[0] || strcmp(opt, "-") == 0)
616                 return 1;
617
618         if (strcasecmp(opt, "a") == 0) {
619                 sanity = 1;
620                 poison = 1;
621                 redzone = 1;
622                 tracking = 1;
623                 return 1;
624         }
625
626         for ( ; *opt; opt++)
627                 switch (*opt) {
628                 case 'F' : case 'f':
629                         if (sanity)
630                                 return 0;
631                         sanity = 1;
632                         break;
633                 case 'P' : case 'p':
634                         if (poison)
635                                 return 0;
636                         poison = 1;
637                         break;
638
639                 case 'Z' : case 'z':
640                         if (redzone)
641                                 return 0;
642                         redzone = 1;
643                         break;
644
645                 case 'U' : case 'u':
646                         if (tracking)
647                                 return 0;
648                         tracking = 1;
649                         break;
650
651                 case 'T' : case 't':
652                         if (tracing)
653                                 return 0;
654                         tracing = 1;
655                         break;
656                 default:
657                         return 0;
658                 }
659         return 1;
660 }
661
662 static int slab_empty(struct slabinfo *s)
663 {
664         if (s->objects > 0)
665                 return 0;
666
667         /*
668          * We may still have slabs even if there are no objects. Shrinking will
669          * remove them.
670          */
671         if (s->slabs != 0)
672                 set_obj(s, "shrink", 1);
673
674         return 1;
675 }
676
677 static void slab_debug(struct slabinfo *s)
678 {
679         if (strcmp(s->name, "*") == 0)
680                 return;
681
682         if (sanity && !s->sanity_checks) {
683                 set_obj(s, "sanity", 1);
684         }
685         if (!sanity && s->sanity_checks) {
686                 if (slab_empty(s))
687                         set_obj(s, "sanity", 0);
688                 else
689                         fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
690         }
691         if (redzone && !s->red_zone) {
692                 if (slab_empty(s))
693                         set_obj(s, "red_zone", 1);
694                 else
695                         fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
696         }
697         if (!redzone && s->red_zone) {
698                 if (slab_empty(s))
699                         set_obj(s, "red_zone", 0);
700                 else
701                         fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
702         }
703         if (poison && !s->poison) {
704                 if (slab_empty(s))
705                         set_obj(s, "poison", 1);
706                 else
707                         fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
708         }
709         if (!poison && s->poison) {
710                 if (slab_empty(s))
711                         set_obj(s, "poison", 0);
712                 else
713                         fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
714         }
715         if (tracking && !s->store_user) {
716                 if (slab_empty(s))
717                         set_obj(s, "store_user", 1);
718                 else
719                         fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
720         }
721         if (!tracking && s->store_user) {
722                 if (slab_empty(s))
723                         set_obj(s, "store_user", 0);
724                 else
725                         fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
726         }
727         if (tracing && !s->trace) {
728                 if (slabs == 1)
729                         set_obj(s, "trace", 1);
730                 else
731                         fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
732         }
733         if (!tracing && s->trace)
734                 set_obj(s, "trace", 1);
735 }
736
737 static void totals(void)
738 {
739         struct slabinfo *s;
740
741         int used_slabs = 0;
742         char b1[20], b2[20], b3[20], b4[20];
743         unsigned long long max = 1ULL << 63;
744
745         /* Object size */
746         unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
747
748         /* Number of partial slabs in a slabcache */
749         unsigned long long min_partial = max, max_partial = 0,
750                                 avg_partial, total_partial = 0;
751
752         /* Number of slabs in a slab cache */
753         unsigned long long min_slabs = max, max_slabs = 0,
754                                 avg_slabs, total_slabs = 0;
755
756         /* Size of the whole slab */
757         unsigned long long min_size = max, max_size = 0,
758                                 avg_size, total_size = 0;
759
760         /* Bytes used for object storage in a slab */
761         unsigned long long min_used = max, max_used = 0,
762                                 avg_used, total_used = 0;
763
764         /* Waste: Bytes used for alignment and padding */
765         unsigned long long min_waste = max, max_waste = 0,
766                                 avg_waste, total_waste = 0;
767         /* Number of objects in a slab */
768         unsigned long long min_objects = max, max_objects = 0,
769                                 avg_objects, total_objects = 0;
770         /* Waste per object */
771         unsigned long long min_objwaste = max,
772                                 max_objwaste = 0, avg_objwaste,
773                                 total_objwaste = 0;
774
775         /* Memory per object */
776         unsigned long long min_memobj = max,
777                                 max_memobj = 0, avg_memobj,
778                                 total_objsize = 0;
779
780         /* Percentage of partial slabs per slab */
781         unsigned long min_ppart = 100, max_ppart = 0,
782                                 avg_ppart, total_ppart = 0;
783
784         /* Number of objects in partial slabs */
785         unsigned long min_partobj = max, max_partobj = 0,
786                                 avg_partobj, total_partobj = 0;
787
788         /* Percentage of partial objects of all objects in a slab */
789         unsigned long min_ppartobj = 100, max_ppartobj = 0,
790                                 avg_ppartobj, total_ppartobj = 0;
791
792
793         for (s = slabinfo; s < slabinfo + slabs; s++) {
794                 unsigned long long size;
795                 unsigned long used;
796                 unsigned long long wasted;
797                 unsigned long long objwaste;
798                 unsigned long percentage_partial_slabs;
799                 unsigned long percentage_partial_objs;
800
801                 if (!s->slabs || !s->objects)
802                         continue;
803
804                 used_slabs++;
805
806                 size = slab_size(s);
807                 used = s->objects * s->object_size;
808                 wasted = size - used;
809                 objwaste = s->slab_size - s->object_size;
810
811                 percentage_partial_slabs = s->partial * 100 / s->slabs;
812                 if (percentage_partial_slabs > 100)
813                         percentage_partial_slabs = 100;
814
815                 percentage_partial_objs = s->objects_partial * 100
816                                                         / s->objects;
817
818                 if (percentage_partial_objs > 100)
819                         percentage_partial_objs = 100;
820
821                 if (s->object_size < min_objsize)
822                         min_objsize = s->object_size;
823                 if (s->partial < min_partial)
824                         min_partial = s->partial;
825                 if (s->slabs < min_slabs)
826                         min_slabs = s->slabs;
827                 if (size < min_size)
828                         min_size = size;
829                 if (wasted < min_waste)
830                         min_waste = wasted;
831                 if (objwaste < min_objwaste)
832                         min_objwaste = objwaste;
833                 if (s->objects < min_objects)
834                         min_objects = s->objects;
835                 if (used < min_used)
836                         min_used = used;
837                 if (s->objects_partial < min_partobj)
838                         min_partobj = s->objects_partial;
839                 if (percentage_partial_slabs < min_ppart)
840                         min_ppart = percentage_partial_slabs;
841                 if (percentage_partial_objs < min_ppartobj)
842                         min_ppartobj = percentage_partial_objs;
843                 if (s->slab_size < min_memobj)
844                         min_memobj = s->slab_size;
845
846                 if (s->object_size > max_objsize)
847                         max_objsize = s->object_size;
848                 if (s->partial > max_partial)
849                         max_partial = s->partial;
850                 if (s->slabs > max_slabs)
851                         max_slabs = s->slabs;
852                 if (size > max_size)
853                         max_size = size;
854                 if (wasted > max_waste)
855                         max_waste = wasted;
856                 if (objwaste > max_objwaste)
857                         max_objwaste = objwaste;
858                 if (s->objects > max_objects)
859                         max_objects = s->objects;
860                 if (used > max_used)
861                         max_used = used;
862                 if (s->objects_partial > max_partobj)
863                         max_partobj = s->objects_partial;
864                 if (percentage_partial_slabs > max_ppart)
865                         max_ppart = percentage_partial_slabs;
866                 if (percentage_partial_objs > max_ppartobj)
867                         max_ppartobj = percentage_partial_objs;
868                 if (s->slab_size > max_memobj)
869                         max_memobj = s->slab_size;
870
871                 total_partial += s->partial;
872                 total_slabs += s->slabs;
873                 total_size += size;
874                 total_waste += wasted;
875
876                 total_objects += s->objects;
877                 total_used += used;
878                 total_partobj += s->objects_partial;
879                 total_ppart += percentage_partial_slabs;
880                 total_ppartobj += percentage_partial_objs;
881
882                 total_objwaste += s->objects * objwaste;
883                 total_objsize += s->objects * s->slab_size;
884         }
885
886         if (!total_objects) {
887                 printf("No objects\n");
888                 return;
889         }
890         if (!used_slabs) {
891                 printf("No slabs\n");
892                 return;
893         }
894
895         /* Per slab averages */
896         avg_partial = total_partial / used_slabs;
897         avg_slabs = total_slabs / used_slabs;
898         avg_size = total_size / used_slabs;
899         avg_waste = total_waste / used_slabs;
900
901         avg_objects = total_objects / used_slabs;
902         avg_used = total_used / used_slabs;
903         avg_partobj = total_partobj / used_slabs;
904         avg_ppart = total_ppart / used_slabs;
905         avg_ppartobj = total_ppartobj / used_slabs;
906
907         /* Per object object sizes */
908         avg_objsize = total_used / total_objects;
909         avg_objwaste = total_objwaste / total_objects;
910         avg_partobj = total_partobj * 100 / total_objects;
911         avg_memobj = total_objsize / total_objects;
912
913         printf("Slabcache Totals\n");
914         printf("----------------\n");
915         printf("Slabcaches : %3d      Aliases  : %3d->%-3d Active: %3d\n",
916                         slabs, aliases, alias_targets, used_slabs);
917
918         store_size(b1, total_size);store_size(b2, total_waste);
919         store_size(b3, total_waste * 100 / total_used);
920         printf("Memory used: %6s   # Loss   : %6s   MRatio:%6s%%\n", b1, b2, b3);
921
922         store_size(b1, total_objects);store_size(b2, total_partobj);
923         store_size(b3, total_partobj * 100 / total_objects);
924         printf("# Objects  : %6s   # PartObj: %6s   ORatio:%6s%%\n", b1, b2, b3);
925
926         printf("\n");
927         printf("Per Cache    Average         Min         Max       Total\n");
928         printf("---------------------------------------------------------\n");
929
930         store_size(b1, avg_objects);store_size(b2, min_objects);
931         store_size(b3, max_objects);store_size(b4, total_objects);
932         printf("#Objects  %10s  %10s  %10s  %10s\n",
933                         b1,     b2,     b3,     b4);
934
935         store_size(b1, avg_slabs);store_size(b2, min_slabs);
936         store_size(b3, max_slabs);store_size(b4, total_slabs);
937         printf("#Slabs    %10s  %10s  %10s  %10s\n",
938                         b1,     b2,     b3,     b4);
939
940         store_size(b1, avg_partial);store_size(b2, min_partial);
941         store_size(b3, max_partial);store_size(b4, total_partial);
942         printf("#PartSlab %10s  %10s  %10s  %10s\n",
943                         b1,     b2,     b3,     b4);
944         store_size(b1, avg_ppart);store_size(b2, min_ppart);
945         store_size(b3, max_ppart);
946         store_size(b4, total_partial * 100  / total_slabs);
947         printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
948                         b1,     b2,     b3,     b4);
949
950         store_size(b1, avg_partobj);store_size(b2, min_partobj);
951         store_size(b3, max_partobj);
952         store_size(b4, total_partobj);
953         printf("PartObjs  %10s  %10s  %10s  %10s\n",
954                         b1,     b2,     b3,     b4);
955
956         store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
957         store_size(b3, max_ppartobj);
958         store_size(b4, total_partobj * 100 / total_objects);
959         printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
960                         b1,     b2,     b3,     b4);
961
962         store_size(b1, avg_size);store_size(b2, min_size);
963         store_size(b3, max_size);store_size(b4, total_size);
964         printf("Memory    %10s  %10s  %10s  %10s\n",
965                         b1,     b2,     b3,     b4);
966
967         store_size(b1, avg_used);store_size(b2, min_used);
968         store_size(b3, max_used);store_size(b4, total_used);
969         printf("Used      %10s  %10s  %10s  %10s\n",
970                         b1,     b2,     b3,     b4);
971
972         store_size(b1, avg_waste);store_size(b2, min_waste);
973         store_size(b3, max_waste);store_size(b4, total_waste);
974         printf("Loss      %10s  %10s  %10s  %10s\n",
975                         b1,     b2,     b3,     b4);
976
977         printf("\n");
978         printf("Per Object   Average         Min         Max\n");
979         printf("---------------------------------------------\n");
980
981         store_size(b1, avg_memobj);store_size(b2, min_memobj);
982         store_size(b3, max_memobj);
983         printf("Memory    %10s  %10s  %10s\n",
984                         b1,     b2,     b3);
985         store_size(b1, avg_objsize);store_size(b2, min_objsize);
986         store_size(b3, max_objsize);
987         printf("User      %10s  %10s  %10s\n",
988                         b1,     b2,     b3);
989
990         store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
991         store_size(b3, max_objwaste);
992         printf("Loss      %10s  %10s  %10s\n",
993                         b1,     b2,     b3);
994 }
995
996 static void sort_slabs(void)
997 {
998         struct slabinfo *s1,*s2;
999
1000         for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1001                 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1002                         int result;
1003
1004                         if (sort_size)
1005                                 result = slab_size(s1) < slab_size(s2);
1006                         else if (sort_active)
1007                                 result = slab_activity(s1) < slab_activity(s2);
1008                         else
1009                                 result = strcasecmp(s1->name, s2->name);
1010
1011                         if (show_inverted)
1012                                 result = -result;
1013
1014                         if (result > 0) {
1015                                 struct slabinfo t;
1016
1017                                 memcpy(&t, s1, sizeof(struct slabinfo));
1018                                 memcpy(s1, s2, sizeof(struct slabinfo));
1019                                 memcpy(s2, &t, sizeof(struct slabinfo));
1020                         }
1021                 }
1022         }
1023 }
1024
1025 static void sort_aliases(void)
1026 {
1027         struct aliasinfo *a1,*a2;
1028
1029         for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1030                 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1031                         char *n1, *n2;
1032
1033                         n1 = a1->name;
1034                         n2 = a2->name;
1035                         if (show_alias && !show_inverted) {
1036                                 n1 = a1->ref;
1037                                 n2 = a2->ref;
1038                         }
1039                         if (strcasecmp(n1, n2) > 0) {
1040                                 struct aliasinfo t;
1041
1042                                 memcpy(&t, a1, sizeof(struct aliasinfo));
1043                                 memcpy(a1, a2, sizeof(struct aliasinfo));
1044                                 memcpy(a2, &t, sizeof(struct aliasinfo));
1045                         }
1046                 }
1047         }
1048 }
1049
1050 static void link_slabs(void)
1051 {
1052         struct aliasinfo *a;
1053         struct slabinfo *s;
1054
1055         for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1056
1057                 for (s = slabinfo; s < slabinfo + slabs; s++)
1058                         if (strcmp(a->ref, s->name) == 0) {
1059                                 a->slab = s;
1060                                 s->refs++;
1061                                 break;
1062                         }
1063                 if (s == slabinfo + slabs)
1064                         fatal("Unresolved alias %s\n", a->ref);
1065         }
1066 }
1067
1068 static void alias(void)
1069 {
1070         struct aliasinfo *a;
1071         char *active = NULL;
1072
1073         sort_aliases();
1074         link_slabs();
1075
1076         for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1077
1078                 if (!show_single_ref && a->slab->refs == 1)
1079                         continue;
1080
1081                 if (!show_inverted) {
1082                         if (active) {
1083                                 if (strcmp(a->slab->name, active) == 0) {
1084                                         printf(" %s", a->name);
1085                                         continue;
1086                                 }
1087                         }
1088                         printf("\n%-12s <- %s", a->slab->name, a->name);
1089                         active = a->slab->name;
1090                 }
1091                 else
1092                         printf("%-20s -> %s\n", a->name, a->slab->name);
1093         }
1094         if (active)
1095                 printf("\n");
1096 }
1097
1098
1099 static void rename_slabs(void)
1100 {
1101         struct slabinfo *s;
1102         struct aliasinfo *a;
1103
1104         for (s = slabinfo; s < slabinfo + slabs; s++) {
1105                 if (*s->name != ':')
1106                         continue;
1107
1108                 if (s->refs > 1 && !show_first_alias)
1109                         continue;
1110
1111                 a = find_one_alias(s);
1112
1113                 if (a)
1114                         s->name = a->name;
1115                 else {
1116                         s->name = "*";
1117                         actual_slabs--;
1118                 }
1119         }
1120 }
1121
1122 static int slab_mismatch(char *slab)
1123 {
1124         return regexec(&pattern, slab, 0, NULL, 0);
1125 }
1126
1127 static void read_slab_dir(void)
1128 {
1129         DIR *dir;
1130         struct dirent *de;
1131         struct slabinfo *slab = slabinfo;
1132         struct aliasinfo *alias = aliasinfo;
1133         char *p;
1134         char *t;
1135         int count;
1136
1137         if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1138                 fatal("SYSFS support for SLUB not active\n");
1139
1140         dir = opendir(".");
1141         while ((de = readdir(dir))) {
1142                 if (de->d_name[0] == '.' ||
1143                         (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1144                                 continue;
1145                 switch (de->d_type) {
1146                    case DT_LNK:
1147                         alias->name = strdup(de->d_name);
1148                         count = readlink(de->d_name, buffer, sizeof(buffer));
1149
1150                         if (count < 0)
1151                                 fatal("Cannot read symlink %s\n", de->d_name);
1152
1153                         buffer[count] = 0;
1154                         p = buffer + count;
1155                         while (p > buffer && p[-1] != '/')
1156                                 p--;
1157                         alias->ref = strdup(p);
1158                         alias++;
1159                         break;
1160                    case DT_DIR:
1161                         if (chdir(de->d_name))
1162                                 fatal("Unable to access slab %s\n", slab->name);
1163                         slab->name = strdup(de->d_name);
1164                         slab->alias = 0;
1165                         slab->refs = 0;
1166                         slab->aliases = get_obj("aliases");
1167                         slab->align = get_obj("align");
1168                         slab->cache_dma = get_obj("cache_dma");
1169                         slab->cpu_slabs = get_obj("cpu_slabs");
1170                         slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1171                         slab->hwcache_align = get_obj("hwcache_align");
1172                         slab->object_size = get_obj("object_size");
1173                         slab->objects = get_obj("objects");
1174                         slab->objects_partial = get_obj("objects_partial");
1175                         slab->objects_total = get_obj("objects_total");
1176                         slab->objs_per_slab = get_obj("objs_per_slab");
1177                         slab->order = get_obj("order");
1178                         slab->partial = get_obj("partial");
1179                         slab->partial = get_obj_and_str("partial", &t);
1180                         decode_numa_list(slab->numa_partial, t);
1181                         free(t);
1182                         slab->poison = get_obj("poison");
1183                         slab->reclaim_account = get_obj("reclaim_account");
1184                         slab->red_zone = get_obj("red_zone");
1185                         slab->sanity_checks = get_obj("sanity_checks");
1186                         slab->slab_size = get_obj("slab_size");
1187                         slab->slabs = get_obj_and_str("slabs", &t);
1188                         decode_numa_list(slab->numa, t);
1189                         free(t);
1190                         slab->store_user = get_obj("store_user");
1191                         slab->trace = get_obj("trace");
1192                         slab->alloc_fastpath = get_obj("alloc_fastpath");
1193                         slab->alloc_slowpath = get_obj("alloc_slowpath");
1194                         slab->free_fastpath = get_obj("free_fastpath");
1195                         slab->free_slowpath = get_obj("free_slowpath");
1196                         slab->free_frozen= get_obj("free_frozen");
1197                         slab->free_add_partial = get_obj("free_add_partial");
1198                         slab->free_remove_partial = get_obj("free_remove_partial");
1199                         slab->alloc_from_partial = get_obj("alloc_from_partial");
1200                         slab->alloc_slab = get_obj("alloc_slab");
1201                         slab->alloc_refill = get_obj("alloc_refill");
1202                         slab->free_slab = get_obj("free_slab");
1203                         slab->cpuslab_flush = get_obj("cpuslab_flush");
1204                         slab->deactivate_full = get_obj("deactivate_full");
1205                         slab->deactivate_empty = get_obj("deactivate_empty");
1206                         slab->deactivate_to_head = get_obj("deactivate_to_head");
1207                         slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1208                         slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1209                         slab->order_fallback = get_obj("order_fallback");
1210                         slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1211                         slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1212                         slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1213                         slab->deactivate_bypass = get_obj("deactivate_bypass");
1214                         chdir("..");
1215                         if (slab->name[0] == ':')
1216                                 alias_targets++;
1217                         slab++;
1218                         break;
1219                    default :
1220                         fatal("Unknown file type %lx\n", de->d_type);
1221                 }
1222         }
1223         closedir(dir);
1224         slabs = slab - slabinfo;
1225         actual_slabs = slabs;
1226         aliases = alias - aliasinfo;
1227         if (slabs > MAX_SLABS)
1228                 fatal("Too many slabs\n");
1229         if (aliases > MAX_ALIASES)
1230                 fatal("Too many aliases\n");
1231 }
1232
1233 static void output_slabs(void)
1234 {
1235         struct slabinfo *slab;
1236
1237         for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
1238
1239                 if (slab->alias)
1240                         continue;
1241
1242
1243                 if (show_numa)
1244                         slab_numa(slab, 0);
1245                 else if (show_track)
1246                         show_tracking(slab);
1247                 else if (validate)
1248                         slab_validate(slab);
1249                 else if (shrink)
1250                         slab_shrink(slab);
1251                 else if (set_debug)
1252                         slab_debug(slab);
1253                 else if (show_ops)
1254                         ops(slab);
1255                 else if (show_slab)
1256                         slabcache(slab);
1257                 else if (show_report)
1258                         report(slab);
1259         }
1260 }
1261
1262 struct option opts[] = {
1263         { "aliases", 0, NULL, 'a' },
1264         { "activity", 0, NULL, 'A' },
1265         { "debug", 2, NULL, 'd' },
1266         { "display-activity", 0, NULL, 'D' },
1267         { "empty", 0, NULL, 'e' },
1268         { "first-alias", 0, NULL, 'f' },
1269         { "help", 0, NULL, 'h' },
1270         { "inverted", 0, NULL, 'i'},
1271         { "numa", 0, NULL, 'n' },
1272         { "ops", 0, NULL, 'o' },
1273         { "report", 0, NULL, 'r' },
1274         { "shrink", 0, NULL, 's' },
1275         { "slabs", 0, NULL, 'l' },
1276         { "track", 0, NULL, 't'},
1277         { "validate", 0, NULL, 'v' },
1278         { "zero", 0, NULL, 'z' },
1279         { "1ref", 0, NULL, '1'},
1280         { NULL, 0, NULL, 0 }
1281 };
1282
1283 int main(int argc, char *argv[])
1284 {
1285         int c;
1286         int err;
1287         char *pattern_source;
1288
1289         page_size = getpagesize();
1290
1291         while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
1292                                                 opts, NULL)) != -1)
1293                 switch (c) {
1294                 case '1':
1295                         show_single_ref = 1;
1296                         break;
1297                 case 'a':
1298                         show_alias = 1;
1299                         break;
1300                 case 'A':
1301                         sort_active = 1;
1302                         break;
1303                 case 'd':
1304                         set_debug = 1;
1305                         if (!debug_opt_scan(optarg))
1306                                 fatal("Invalid debug option '%s'\n", optarg);
1307                         break;
1308                 case 'D':
1309                         show_activity = 1;
1310                         break;
1311                 case 'e':
1312                         show_empty = 1;
1313                         break;
1314                 case 'f':
1315                         show_first_alias = 1;
1316                         break;
1317                 case 'h':
1318                         usage();
1319                         return 0;
1320                 case 'i':
1321                         show_inverted = 1;
1322                         break;
1323                 case 'n':
1324                         show_numa = 1;
1325                         break;
1326                 case 'o':
1327                         show_ops = 1;
1328                         break;
1329                 case 'r':
1330                         show_report = 1;
1331                         break;
1332                 case 's':
1333                         shrink = 1;
1334                         break;
1335                 case 'l':
1336                         show_slab = 1;
1337                         break;
1338                 case 't':
1339                         show_track = 1;
1340                         break;
1341                 case 'v':
1342                         validate = 1;
1343                         break;
1344                 case 'z':
1345                         skip_zero = 0;
1346                         break;
1347                 case 'T':
1348                         show_totals = 1;
1349                         break;
1350                 case 'S':
1351                         sort_size = 1;
1352                         break;
1353
1354                 default:
1355                         fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1356
1357         }
1358
1359         if (!show_slab && !show_alias && !show_track && !show_report
1360                 && !validate && !shrink && !set_debug && !show_ops)
1361                         show_slab = 1;
1362
1363         if (argc > optind)
1364                 pattern_source = argv[optind];
1365         else
1366                 pattern_source = ".*";
1367
1368         err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1369         if (err)
1370                 fatal("%s: Invalid pattern '%s' code %d\n",
1371                         argv[0], pattern_source, err);
1372         read_slab_dir();
1373         if (show_alias)
1374                 alias();
1375         else
1376         if (show_totals)
1377                 totals();
1378         else {
1379                 link_slabs();
1380                 rename_slabs();
1381                 sort_slabs();
1382                 output_slabs();
1383         }
1384         return 0;
1385 }