mm: move slabinfo.c to tools/vm
authorDave Young <dyoung@redhat.com>
Wed, 28 Mar 2012 21:42:55 +0000 (14:42 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 29 Mar 2012 00:14:37 +0000 (17:14 -0700)
We have tools/vm/ folder for vm tools, so move slabinfo.c from tools/slub/
to tools/vm/

Signed-off-by: Dave Young <dyoung@redhat.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
tools/slub/slabinfo.c [deleted file]
tools/vm/Makefile
tools/vm/slabinfo.c [new file with mode: 0644]

diff --git a/tools/slub/slabinfo.c b/tools/slub/slabinfo.c
deleted file mode 100644 (file)
index 164cbcf..0000000
+++ /dev/null
@@ -1,1393 +0,0 @@
-/*
- * Slabinfo: Tool to get reports about slabs
- *
- * (C) 2007 sgi, Christoph Lameter
- * (C) 2011 Linux Foundation, Christoph Lameter
- *
- * Compile with:
- *
- * gcc -o slabinfo slabinfo.c
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <strings.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdarg.h>
-#include <getopt.h>
-#include <regex.h>
-#include <errno.h>
-
-#define MAX_SLABS 500
-#define MAX_ALIASES 500
-#define MAX_NODES 1024
-
-struct slabinfo {
-       char *name;
-       int alias;
-       int refs;
-       int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
-       int hwcache_align, object_size, objs_per_slab;
-       int sanity_checks, slab_size, store_user, trace;
-       int order, poison, reclaim_account, red_zone;
-       unsigned long partial, objects, slabs, objects_partial, objects_total;
-       unsigned long alloc_fastpath, alloc_slowpath;
-       unsigned long free_fastpath, free_slowpath;
-       unsigned long free_frozen, free_add_partial, free_remove_partial;
-       unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
-       unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
-       unsigned long deactivate_to_head, deactivate_to_tail;
-       unsigned long deactivate_remote_frees, order_fallback;
-       unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
-       unsigned long alloc_node_mismatch, deactivate_bypass;
-       unsigned long cpu_partial_alloc, cpu_partial_free;
-       int numa[MAX_NODES];
-       int numa_partial[MAX_NODES];
-} slabinfo[MAX_SLABS];
-
-struct aliasinfo {
-       char *name;
-       char *ref;
-       struct slabinfo *slab;
-} aliasinfo[MAX_ALIASES];
-
-int slabs = 0;
-int actual_slabs = 0;
-int aliases = 0;
-int alias_targets = 0;
-int highest_node = 0;
-
-char buffer[4096];
-
-int show_empty = 0;
-int show_report = 0;
-int show_alias = 0;
-int show_slab = 0;
-int skip_zero = 1;
-int show_numa = 0;
-int show_track = 0;
-int show_first_alias = 0;
-int validate = 0;
-int shrink = 0;
-int show_inverted = 0;
-int show_single_ref = 0;
-int show_totals = 0;
-int sort_size = 0;
-int sort_active = 0;
-int set_debug = 0;
-int show_ops = 0;
-int show_activity = 0;
-
-/* Debug options */
-int sanity = 0;
-int redzone = 0;
-int poison = 0;
-int tracking = 0;
-int tracing = 0;
-
-int page_size;
-
-regex_t pattern;
-
-static void fatal(const char *x, ...)
-{
-       va_list ap;
-
-       va_start(ap, x);
-       vfprintf(stderr, x, ap);
-       va_end(ap);
-       exit(EXIT_FAILURE);
-}
-
-static void usage(void)
-{
-       printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
-               "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
-               "-a|--aliases           Show aliases\n"
-               "-A|--activity          Most active slabs first\n"
-               "-d<options>|--debug=<options> Set/Clear Debug options\n"
-               "-D|--display-active    Switch line format to activity\n"
-               "-e|--empty             Show empty slabs\n"
-               "-f|--first-alias       Show first alias\n"
-               "-h|--help              Show usage information\n"
-               "-i|--inverted          Inverted list\n"
-               "-l|--slabs             Show slabs\n"
-               "-n|--numa              Show NUMA information\n"
-               "-o|--ops               Show kmem_cache_ops\n"
-               "-s|--shrink            Shrink slabs\n"
-               "-r|--report            Detailed report on single slabs\n"
-               "-S|--Size              Sort by size\n"
-               "-t|--tracking          Show alloc/free information\n"
-               "-T|--Totals            Show summary information\n"
-               "-v|--validate          Validate slabs\n"
-               "-z|--zero              Include empty slabs\n"
-               "-1|--1ref              Single reference\n"
-               "\nValid debug options (FZPUT may be combined)\n"
-               "a / A          Switch on all debug options (=FZUP)\n"
-               "-              Switch off all debug options\n"
-               "f / F          Sanity Checks (SLAB_DEBUG_FREE)\n"
-               "z / Z          Redzoning\n"
-               "p / P          Poisoning\n"
-               "u / U          Tracking\n"
-               "t / T          Tracing\n"
-       );
-}
-
-static unsigned long read_obj(const char *name)
-{
-       FILE *f = fopen(name, "r");
-
-       if (!f)
-               buffer[0] = 0;
-       else {
-               if (!fgets(buffer, sizeof(buffer), f))
-                       buffer[0] = 0;
-               fclose(f);
-               if (buffer[strlen(buffer)] == '\n')
-                       buffer[strlen(buffer)] = 0;
-       }
-       return strlen(buffer);
-}
-
-
-/*
- * Get the contents of an attribute
- */
-static unsigned long get_obj(const char *name)
-{
-       if (!read_obj(name))
-               return 0;
-
-       return atol(buffer);
-}
-
-static unsigned long get_obj_and_str(const char *name, char **x)
-{
-       unsigned long result = 0;
-       char *p;
-
-       *x = NULL;
-
-       if (!read_obj(name)) {
-               x = NULL;
-               return 0;
-       }
-       result = strtoul(buffer, &p, 10);
-       while (*p == ' ')
-               p++;
-       if (*p)
-               *x = strdup(p);
-       return result;
-}
-
-static void set_obj(struct slabinfo *s, const char *name, int n)
-{
-       char x[100];
-       FILE *f;
-
-       snprintf(x, 100, "%s/%s", s->name, name);
-       f = fopen(x, "w");
-       if (!f)
-               fatal("Cannot write to %s\n", x);
-
-       fprintf(f, "%d\n", n);
-       fclose(f);
-}
-
-static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
-{
-       char x[100];
-       FILE *f;
-       size_t l;
-
-       snprintf(x, 100, "%s/%s", s->name, name);
-       f = fopen(x, "r");
-       if (!f) {
-               buffer[0] = 0;
-               l = 0;
-       } else {
-               l = fread(buffer, 1, sizeof(buffer), f);
-               buffer[l] = 0;
-               fclose(f);
-       }
-       return l;
-}
-
-
-/*
- * Put a size string together
- */
-static int store_size(char *buffer, unsigned long value)
-{
-       unsigned long divisor = 1;
-       char trailer = 0;
-       int n;
-
-       if (value > 1000000000UL) {
-               divisor = 100000000UL;
-               trailer = 'G';
-       } else if (value > 1000000UL) {
-               divisor = 100000UL;
-               trailer = 'M';
-       } else if (value > 1000UL) {
-               divisor = 100;
-               trailer = 'K';
-       }
-
-       value /= divisor;
-       n = sprintf(buffer, "%ld",value);
-       if (trailer) {
-               buffer[n] = trailer;
-               n++;
-               buffer[n] = 0;
-       }
-       if (divisor != 1) {
-               memmove(buffer + n - 2, buffer + n - 3, 4);
-               buffer[n-2] = '.';
-               n++;
-       }
-       return n;
-}
-
-static void decode_numa_list(int *numa, char *t)
-{
-       int node;
-       int nr;
-
-       memset(numa, 0, MAX_NODES * sizeof(int));
-
-       if (!t)
-               return;
-
-       while (*t == 'N') {
-               t++;
-               node = strtoul(t, &t, 10);
-               if (*t == '=') {
-                       t++;
-                       nr = strtoul(t, &t, 10);
-                       numa[node] = nr;
-                       if (node > highest_node)
-                               highest_node = node;
-               }
-               while (*t == ' ')
-                       t++;
-       }
-}
-
-static void slab_validate(struct slabinfo *s)
-{
-       if (strcmp(s->name, "*") == 0)
-               return;
-
-       set_obj(s, "validate", 1);
-}
-
-static void slab_shrink(struct slabinfo *s)
-{
-       if (strcmp(s->name, "*") == 0)
-               return;
-
-       set_obj(s, "shrink", 1);
-}
-
-int line = 0;
-
-static void first_line(void)
-{
-       if (show_activity)
-               printf("Name                   Objects      Alloc       Free   %%Fast Fallb O CmpX   UL\n");
-       else
-               printf("Name                   Objects Objsize    Space "
-                       "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
-}
-
-/*
- * Find the shortest alias of a slab
- */
-static struct aliasinfo *find_one_alias(struct slabinfo *find)
-{
-       struct aliasinfo *a;
-       struct aliasinfo *best = NULL;
-
-       for(a = aliasinfo;a < aliasinfo + aliases; a++) {
-               if (a->slab == find &&
-                       (!best || strlen(best->name) < strlen(a->name))) {
-                               best = a;
-                               if (strncmp(a->name,"kmall", 5) == 0)
-                                       return best;
-                       }
-       }
-       return best;
-}
-
-static unsigned long slab_size(struct slabinfo *s)
-{
-       return  s->slabs * (page_size << s->order);
-}
-
-static unsigned long slab_activity(struct slabinfo *s)
-{
-       return  s->alloc_fastpath + s->free_fastpath +
-               s->alloc_slowpath + s->free_slowpath;
-}
-
-static void slab_numa(struct slabinfo *s, int mode)
-{
-       int node;
-
-       if (strcmp(s->name, "*") == 0)
-               return;
-
-       if (!highest_node) {
-               printf("\n%s: No NUMA information available.\n", s->name);
-               return;
-       }
-
-       if (skip_zero && !s->slabs)
-               return;
-
-       if (!line) {
-               printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
-               for(node = 0; node <= highest_node; node++)
-                       printf(" %4d", node);
-               printf("\n----------------------");
-               for(node = 0; node <= highest_node; node++)
-                       printf("-----");
-               printf("\n");
-       }
-       printf("%-21s ", mode ? "All slabs" : s->name);
-       for(node = 0; node <= highest_node; node++) {
-               char b[20];
-
-               store_size(b, s->numa[node]);
-               printf(" %4s", b);
-       }
-       printf("\n");
-       if (mode) {
-               printf("%-21s ", "Partial slabs");
-               for(node = 0; node <= highest_node; node++) {
-                       char b[20];
-
-                       store_size(b, s->numa_partial[node]);
-                       printf(" %4s", b);
-               }
-               printf("\n");
-       }
-       line++;
-}
-
-static void show_tracking(struct slabinfo *s)
-{
-       printf("\n%s: Kernel object allocation\n", s->name);
-       printf("-----------------------------------------------------------------------\n");
-       if (read_slab_obj(s, "alloc_calls"))
-               printf("%s", buffer);
-       else
-               printf("No Data\n");
-
-       printf("\n%s: Kernel object freeing\n", s->name);
-       printf("------------------------------------------------------------------------\n");
-       if (read_slab_obj(s, "free_calls"))
-               printf("%s", buffer);
-       else
-               printf("No Data\n");
-
-}
-
-static void ops(struct slabinfo *s)
-{
-       if (strcmp(s->name, "*") == 0)
-               return;
-
-       if (read_slab_obj(s, "ops")) {
-               printf("\n%s: kmem_cache operations\n", s->name);
-               printf("--------------------------------------------\n");
-               printf("%s", buffer);
-       } else
-               printf("\n%s has no kmem_cache operations\n", s->name);
-}
-
-static const char *onoff(int x)
-{
-       if (x)
-               return "On ";
-       return "Off";
-}
-
-static void slab_stats(struct slabinfo *s)
-{
-       unsigned long total_alloc;
-       unsigned long total_free;
-       unsigned long total;
-
-       if (!s->alloc_slab)
-               return;
-
-       total_alloc = s->alloc_fastpath + s->alloc_slowpath;
-       total_free = s->free_fastpath + s->free_slowpath;
-
-       if (!total_alloc)
-               return;
-
-       printf("\n");
-       printf("Slab Perf Counter       Alloc     Free %%Al %%Fr\n");
-       printf("--------------------------------------------------\n");
-       printf("Fastpath             %8lu %8lu %3lu %3lu\n",
-               s->alloc_fastpath, s->free_fastpath,
-               s->alloc_fastpath * 100 / total_alloc,
-               s->free_fastpath * 100 / total_free);
-       printf("Slowpath             %8lu %8lu %3lu %3lu\n",
-               total_alloc - s->alloc_fastpath, s->free_slowpath,
-               (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
-               s->free_slowpath * 100 / total_free);
-       printf("Page Alloc           %8lu %8lu %3lu %3lu\n",
-               s->alloc_slab, s->free_slab,
-               s->alloc_slab * 100 / total_alloc,
-               s->free_slab * 100 / total_free);
-       printf("Add partial          %8lu %8lu %3lu %3lu\n",
-               s->deactivate_to_head + s->deactivate_to_tail,
-               s->free_add_partial,
-               (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
-               s->free_add_partial * 100 / total_free);
-       printf("Remove partial       %8lu %8lu %3lu %3lu\n",
-               s->alloc_from_partial, s->free_remove_partial,
-               s->alloc_from_partial * 100 / total_alloc,
-               s->free_remove_partial * 100 / total_free);
-
-       printf("Cpu partial list     %8lu %8lu %3lu %3lu\n",
-               s->cpu_partial_alloc, s->cpu_partial_free,
-               s->cpu_partial_alloc * 100 / total_alloc,
-               s->cpu_partial_free * 100 / total_free);
-
-       printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
-               s->deactivate_remote_frees, s->free_frozen,
-               s->deactivate_remote_frees * 100 / total_alloc,
-               s->free_frozen * 100 / total_free);
-
-       printf("Total                %8lu %8lu\n\n", total_alloc, total_free);
-
-       if (s->cpuslab_flush)
-               printf("Flushes %8lu\n", s->cpuslab_flush);
-
-       total = s->deactivate_full + s->deactivate_empty +
-                       s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
-
-       if (total) {
-               printf("\nSlab Deactivation             Ocurrences  %%\n");
-               printf("-------------------------------------------------\n");
-               printf("Slab full                     %7lu  %3lu%%\n",
-                       s->deactivate_full, (s->deactivate_full * 100) / total);
-               printf("Slab empty                    %7lu  %3lu%%\n",
-                       s->deactivate_empty, (s->deactivate_empty * 100) / total);
-               printf("Moved to head of partial list %7lu  %3lu%%\n",
-                       s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
-               printf("Moved to tail of partial list %7lu  %3lu%%\n",
-                       s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
-               printf("Deactivation bypass           %7lu  %3lu%%\n",
-                       s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
-               printf("Refilled from foreign frees   %7lu  %3lu%%\n",
-                       s->alloc_refill, (s->alloc_refill * 100) / total);
-               printf("Node mismatch                 %7lu  %3lu%%\n",
-                       s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
-       }
-
-       if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail)
-               printf("\nCmpxchg_double Looping\n------------------------\n");
-               printf("Locked Cmpxchg Double redos   %lu\nUnlocked Cmpxchg Double redos %lu\n",
-                       s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
-}
-
-static void report(struct slabinfo *s)
-{
-       if (strcmp(s->name, "*") == 0)
-               return;
-
-       printf("\nSlabcache: %-20s  Aliases: %2d Order : %2d Objects: %lu\n",
-               s->name, s->aliases, s->order, s->objects);
-       if (s->hwcache_align)
-               printf("** Hardware cacheline aligned\n");
-       if (s->cache_dma)
-               printf("** Memory is allocated in a special DMA zone\n");
-       if (s->destroy_by_rcu)
-               printf("** Slabs are destroyed via RCU\n");
-       if (s->reclaim_account)
-               printf("** Reclaim accounting active\n");
-
-       printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
-       printf("------------------------------------------------------------------------\n");
-       printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
-                       s->object_size, s->slabs, onoff(s->sanity_checks),
-                       s->slabs * (page_size << s->order));
-       printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
-                       s->slab_size, s->slabs - s->partial - s->cpu_slabs,
-                       onoff(s->red_zone), s->objects * s->object_size);
-       printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
-                       page_size << s->order, s->partial, onoff(s->poison),
-                       s->slabs * (page_size << s->order) - s->objects * s->object_size);
-       printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
-                       s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
-                       (s->slab_size - s->object_size) * s->objects);
-       printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
-                       s->align, s->objs_per_slab, onoff(s->trace),
-                       ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
-                       s->slabs);
-
-       ops(s);
-       show_tracking(s);
-       slab_numa(s, 1);
-       slab_stats(s);
-}
-
-static void slabcache(struct slabinfo *s)
-{
-       char size_str[20];
-       char dist_str[40];
-       char flags[20];
-       char *p = flags;
-
-       if (strcmp(s->name, "*") == 0)
-               return;
-
-       if (actual_slabs == 1) {
-               report(s);
-               return;
-       }
-
-       if (skip_zero && !show_empty && !s->slabs)
-               return;
-
-       if (show_empty && s->slabs)
-               return;
-
-       store_size(size_str, slab_size(s));
-       snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
-                                               s->partial, s->cpu_slabs);
-
-       if (!line++)
-               first_line();
-
-       if (s->aliases)
-               *p++ = '*';
-       if (s->cache_dma)
-               *p++ = 'd';
-       if (s->hwcache_align)
-               *p++ = 'A';
-       if (s->poison)
-               *p++ = 'P';
-       if (s->reclaim_account)
-               *p++ = 'a';
-       if (s->red_zone)
-               *p++ = 'Z';
-       if (s->sanity_checks)
-               *p++ = 'F';
-       if (s->store_user)
-               *p++ = 'U';
-       if (s->trace)
-               *p++ = 'T';
-
-       *p = 0;
-       if (show_activity) {
-               unsigned long total_alloc;
-               unsigned long total_free;
-
-               total_alloc = s->alloc_fastpath + s->alloc_slowpath;
-               total_free = s->free_fastpath + s->free_slowpath;
-
-               printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
-                       s->name, s->objects,
-                       total_alloc, total_free,
-                       total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
-                       total_free ? (s->free_fastpath * 100 / total_free) : 0,
-                       s->order_fallback, s->order, s->cmpxchg_double_fail,
-                       s->cmpxchg_double_cpu_fail);
-       }
-       else
-               printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
-                       s->name, s->objects, s->object_size, size_str, dist_str,
-                       s->objs_per_slab, s->order,
-                       s->slabs ? (s->partial * 100) / s->slabs : 100,
-                       s->slabs ? (s->objects * s->object_size * 100) /
-                               (s->slabs * (page_size << s->order)) : 100,
-                       flags);
-}
-
-/*
- * Analyze debug options. Return false if something is amiss.
- */
-static int debug_opt_scan(char *opt)
-{
-       if (!opt || !opt[0] || strcmp(opt, "-") == 0)
-               return 1;
-
-       if (strcasecmp(opt, "a") == 0) {
-               sanity = 1;
-               poison = 1;
-               redzone = 1;
-               tracking = 1;
-               return 1;
-       }
-
-       for ( ; *opt; opt++)
-               switch (*opt) {
-               case 'F' : case 'f':
-                       if (sanity)
-                               return 0;
-                       sanity = 1;
-                       break;
-               case 'P' : case 'p':
-                       if (poison)
-                               return 0;
-                       poison = 1;
-                       break;
-
-               case 'Z' : case 'z':
-                       if (redzone)
-                               return 0;
-                       redzone = 1;
-                       break;
-
-               case 'U' : case 'u':
-                       if (tracking)
-                               return 0;
-                       tracking = 1;
-                       break;
-
-               case 'T' : case 't':
-                       if (tracing)
-                               return 0;
-                       tracing = 1;
-                       break;
-               default:
-                       return 0;
-               }
-       return 1;
-}
-
-static int slab_empty(struct slabinfo *s)
-{
-       if (s->objects > 0)
-               return 0;
-
-       /*
-        * We may still have slabs even if there are no objects. Shrinking will
-        * remove them.
-        */
-       if (s->slabs != 0)
-               set_obj(s, "shrink", 1);
-
-       return 1;
-}
-
-static void slab_debug(struct slabinfo *s)
-{
-       if (strcmp(s->name, "*") == 0)
-               return;
-
-       if (sanity && !s->sanity_checks) {
-               set_obj(s, "sanity", 1);
-       }
-       if (!sanity && s->sanity_checks) {
-               if (slab_empty(s))
-                       set_obj(s, "sanity", 0);
-               else
-                       fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
-       }
-       if (redzone && !s->red_zone) {
-               if (slab_empty(s))
-                       set_obj(s, "red_zone", 1);
-               else
-                       fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
-       }
-       if (!redzone && s->red_zone) {
-               if (slab_empty(s))
-                       set_obj(s, "red_zone", 0);
-               else
-                       fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
-       }
-       if (poison && !s->poison) {
-               if (slab_empty(s))
-                       set_obj(s, "poison", 1);
-               else
-                       fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
-       }
-       if (!poison && s->poison) {
-               if (slab_empty(s))
-                       set_obj(s, "poison", 0);
-               else
-                       fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
-       }
-       if (tracking && !s->store_user) {
-               if (slab_empty(s))
-                       set_obj(s, "store_user", 1);
-               else
-                       fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
-       }
-       if (!tracking && s->store_user) {
-               if (slab_empty(s))
-                       set_obj(s, "store_user", 0);
-               else
-                       fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
-       }
-       if (tracing && !s->trace) {
-               if (slabs == 1)
-                       set_obj(s, "trace", 1);
-               else
-                       fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
-       }
-       if (!tracing && s->trace)
-               set_obj(s, "trace", 1);
-}
-
-static void totals(void)
-{
-       struct slabinfo *s;
-
-       int used_slabs = 0;
-       char b1[20], b2[20], b3[20], b4[20];
-       unsigned long long max = 1ULL << 63;
-
-       /* Object size */
-       unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
-
-       /* Number of partial slabs in a slabcache */
-       unsigned long long min_partial = max, max_partial = 0,
-                               avg_partial, total_partial = 0;
-
-       /* Number of slabs in a slab cache */
-       unsigned long long min_slabs = max, max_slabs = 0,
-                               avg_slabs, total_slabs = 0;
-
-       /* Size of the whole slab */
-       unsigned long long min_size = max, max_size = 0,
-                               avg_size, total_size = 0;
-
-       /* Bytes used for object storage in a slab */
-       unsigned long long min_used = max, max_used = 0,
-                               avg_used, total_used = 0;
-
-       /* Waste: Bytes used for alignment and padding */
-       unsigned long long min_waste = max, max_waste = 0,
-                               avg_waste, total_waste = 0;
-       /* Number of objects in a slab */
-       unsigned long long min_objects = max, max_objects = 0,
-                               avg_objects, total_objects = 0;
-       /* Waste per object */
-       unsigned long long min_objwaste = max,
-                               max_objwaste = 0, avg_objwaste,
-                               total_objwaste = 0;
-
-       /* Memory per object */
-       unsigned long long min_memobj = max,
-                               max_memobj = 0, avg_memobj,
-                               total_objsize = 0;
-
-       /* Percentage of partial slabs per slab */
-       unsigned long min_ppart = 100, max_ppart = 0,
-                               avg_ppart, total_ppart = 0;
-
-       /* Number of objects in partial slabs */
-       unsigned long min_partobj = max, max_partobj = 0,
-                               avg_partobj, total_partobj = 0;
-
-       /* Percentage of partial objects of all objects in a slab */
-       unsigned long min_ppartobj = 100, max_ppartobj = 0,
-                               avg_ppartobj, total_ppartobj = 0;
-
-
-       for (s = slabinfo; s < slabinfo + slabs; s++) {
-               unsigned long long size;
-               unsigned long used;
-               unsigned long long wasted;
-               unsigned long long objwaste;
-               unsigned long percentage_partial_slabs;
-               unsigned long percentage_partial_objs;
-
-               if (!s->slabs || !s->objects)
-                       continue;
-
-               used_slabs++;
-
-               size = slab_size(s);
-               used = s->objects * s->object_size;
-               wasted = size - used;
-               objwaste = s->slab_size - s->object_size;
-
-               percentage_partial_slabs = s->partial * 100 / s->slabs;
-               if (percentage_partial_slabs > 100)
-                       percentage_partial_slabs = 100;
-
-               percentage_partial_objs = s->objects_partial * 100
-                                                       / s->objects;
-
-               if (percentage_partial_objs > 100)
-                       percentage_partial_objs = 100;
-
-               if (s->object_size < min_objsize)
-                       min_objsize = s->object_size;
-               if (s->partial < min_partial)
-                       min_partial = s->partial;
-               if (s->slabs < min_slabs)
-                       min_slabs = s->slabs;
-               if (size < min_size)
-                       min_size = size;
-               if (wasted < min_waste)
-                       min_waste = wasted;
-               if (objwaste < min_objwaste)
-                       min_objwaste = objwaste;
-               if (s->objects < min_objects)
-                       min_objects = s->objects;
-               if (used < min_used)
-                       min_used = used;
-               if (s->objects_partial < min_partobj)
-                       min_partobj = s->objects_partial;
-               if (percentage_partial_slabs < min_ppart)
-                       min_ppart = percentage_partial_slabs;
-               if (percentage_partial_objs < min_ppartobj)
-                       min_ppartobj = percentage_partial_objs;
-               if (s->slab_size < min_memobj)
-                       min_memobj = s->slab_size;
-
-               if (s->object_size > max_objsize)
-                       max_objsize = s->object_size;
-               if (s->partial > max_partial)
-                       max_partial = s->partial;
-               if (s->slabs > max_slabs)
-                       max_slabs = s->slabs;
-               if (size > max_size)
-                       max_size = size;
-               if (wasted > max_waste)
-                       max_waste = wasted;
-               if (objwaste > max_objwaste)
-                       max_objwaste = objwaste;
-               if (s->objects > max_objects)
-                       max_objects = s->objects;
-               if (used > max_used)
-                       max_used = used;
-               if (s->objects_partial > max_partobj)
-                       max_partobj = s->objects_partial;
-               if (percentage_partial_slabs > max_ppart)
-                       max_ppart = percentage_partial_slabs;
-               if (percentage_partial_objs > max_ppartobj)
-                       max_ppartobj = percentage_partial_objs;
-               if (s->slab_size > max_memobj)
-                       max_memobj = s->slab_size;
-
-               total_partial += s->partial;
-               total_slabs += s->slabs;
-               total_size += size;
-               total_waste += wasted;
-
-               total_objects += s->objects;
-               total_used += used;
-               total_partobj += s->objects_partial;
-               total_ppart += percentage_partial_slabs;
-               total_ppartobj += percentage_partial_objs;
-
-               total_objwaste += s->objects * objwaste;
-               total_objsize += s->objects * s->slab_size;
-       }
-
-       if (!total_objects) {
-               printf("No objects\n");
-               return;
-       }
-       if (!used_slabs) {
-               printf("No slabs\n");
-               return;
-       }
-
-       /* Per slab averages */
-       avg_partial = total_partial / used_slabs;
-       avg_slabs = total_slabs / used_slabs;
-       avg_size = total_size / used_slabs;
-       avg_waste = total_waste / used_slabs;
-
-       avg_objects = total_objects / used_slabs;
-       avg_used = total_used / used_slabs;
-       avg_partobj = total_partobj / used_slabs;
-       avg_ppart = total_ppart / used_slabs;
-       avg_ppartobj = total_ppartobj / used_slabs;
-
-       /* Per object object sizes */
-       avg_objsize = total_used / total_objects;
-       avg_objwaste = total_objwaste / total_objects;
-       avg_partobj = total_partobj * 100 / total_objects;
-       avg_memobj = total_objsize / total_objects;
-
-       printf("Slabcache Totals\n");
-       printf("----------------\n");
-       printf("Slabcaches : %3d      Aliases  : %3d->%-3d Active: %3d\n",
-                       slabs, aliases, alias_targets, used_slabs);
-
-       store_size(b1, total_size);store_size(b2, total_waste);
-       store_size(b3, total_waste * 100 / total_used);
-       printf("Memory used: %6s   # Loss   : %6s   MRatio:%6s%%\n", b1, b2, b3);
-
-       store_size(b1, total_objects);store_size(b2, total_partobj);
-       store_size(b3, total_partobj * 100 / total_objects);
-       printf("# Objects  : %6s   # PartObj: %6s   ORatio:%6s%%\n", b1, b2, b3);
-
-       printf("\n");
-       printf("Per Cache    Average         Min         Max       Total\n");
-       printf("---------------------------------------------------------\n");
-
-       store_size(b1, avg_objects);store_size(b2, min_objects);
-       store_size(b3, max_objects);store_size(b4, total_objects);
-       printf("#Objects  %10s  %10s  %10s  %10s\n",
-                       b1,     b2,     b3,     b4);
-
-       store_size(b1, avg_slabs);store_size(b2, min_slabs);
-       store_size(b3, max_slabs);store_size(b4, total_slabs);
-       printf("#Slabs    %10s  %10s  %10s  %10s\n",
-                       b1,     b2,     b3,     b4);
-
-       store_size(b1, avg_partial);store_size(b2, min_partial);
-       store_size(b3, max_partial);store_size(b4, total_partial);
-       printf("#PartSlab %10s  %10s  %10s  %10s\n",
-                       b1,     b2,     b3,     b4);
-       store_size(b1, avg_ppart);store_size(b2, min_ppart);
-       store_size(b3, max_ppart);
-       store_size(b4, total_partial * 100  / total_slabs);
-       printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
-                       b1,     b2,     b3,     b4);
-
-       store_size(b1, avg_partobj);store_size(b2, min_partobj);
-       store_size(b3, max_partobj);
-       store_size(b4, total_partobj);
-       printf("PartObjs  %10s  %10s  %10s  %10s\n",
-                       b1,     b2,     b3,     b4);
-
-       store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
-       store_size(b3, max_ppartobj);
-       store_size(b4, total_partobj * 100 / total_objects);
-       printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
-                       b1,     b2,     b3,     b4);
-
-       store_size(b1, avg_size);store_size(b2, min_size);
-       store_size(b3, max_size);store_size(b4, total_size);
-       printf("Memory    %10s  %10s  %10s  %10s\n",
-                       b1,     b2,     b3,     b4);
-
-       store_size(b1, avg_used);store_size(b2, min_used);
-       store_size(b3, max_used);store_size(b4, total_used);
-       printf("Used      %10s  %10s  %10s  %10s\n",
-                       b1,     b2,     b3,     b4);
-
-       store_size(b1, avg_waste);store_size(b2, min_waste);
-       store_size(b3, max_waste);store_size(b4, total_waste);
-       printf("Loss      %10s  %10s  %10s  %10s\n",
-                       b1,     b2,     b3,     b4);
-
-       printf("\n");
-       printf("Per Object   Average         Min         Max\n");
-       printf("---------------------------------------------\n");
-
-       store_size(b1, avg_memobj);store_size(b2, min_memobj);
-       store_size(b3, max_memobj);
-       printf("Memory    %10s  %10s  %10s\n",
-                       b1,     b2,     b3);
-       store_size(b1, avg_objsize);store_size(b2, min_objsize);
-       store_size(b3, max_objsize);
-       printf("User      %10s  %10s  %10s\n",
-                       b1,     b2,     b3);
-
-       store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
-       store_size(b3, max_objwaste);
-       printf("Loss      %10s  %10s  %10s\n",
-                       b1,     b2,     b3);
-}
-
-static void sort_slabs(void)
-{
-       struct slabinfo *s1,*s2;
-
-       for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
-               for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
-                       int result;
-
-                       if (sort_size)
-                               result = slab_size(s1) < slab_size(s2);
-                       else if (sort_active)
-                               result = slab_activity(s1) < slab_activity(s2);
-                       else
-                               result = strcasecmp(s1->name, s2->name);
-
-                       if (show_inverted)
-                               result = -result;
-
-                       if (result > 0) {
-                               struct slabinfo t;
-
-                               memcpy(&t, s1, sizeof(struct slabinfo));
-                               memcpy(s1, s2, sizeof(struct slabinfo));
-                               memcpy(s2, &t, sizeof(struct slabinfo));
-                       }
-               }
-       }
-}
-
-static void sort_aliases(void)
-{
-       struct aliasinfo *a1,*a2;
-
-       for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
-               for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
-                       char *n1, *n2;
-
-                       n1 = a1->name;
-                       n2 = a2->name;
-                       if (show_alias && !show_inverted) {
-                               n1 = a1->ref;
-                               n2 = a2->ref;
-                       }
-                       if (strcasecmp(n1, n2) > 0) {
-                               struct aliasinfo t;
-
-                               memcpy(&t, a1, sizeof(struct aliasinfo));
-                               memcpy(a1, a2, sizeof(struct aliasinfo));
-                               memcpy(a2, &t, sizeof(struct aliasinfo));
-                       }
-               }
-       }
-}
-
-static void link_slabs(void)
-{
-       struct aliasinfo *a;
-       struct slabinfo *s;
-
-       for (a = aliasinfo; a < aliasinfo + aliases; a++) {
-
-               for (s = slabinfo; s < slabinfo + slabs; s++)
-                       if (strcmp(a->ref, s->name) == 0) {
-                               a->slab = s;
-                               s->refs++;
-                               break;
-                       }
-               if (s == slabinfo + slabs)
-                       fatal("Unresolved alias %s\n", a->ref);
-       }
-}
-
-static void alias(void)
-{
-       struct aliasinfo *a;
-       char *active = NULL;
-
-       sort_aliases();
-       link_slabs();
-
-       for(a = aliasinfo; a < aliasinfo + aliases; a++) {
-
-               if (!show_single_ref && a->slab->refs == 1)
-                       continue;
-
-               if (!show_inverted) {
-                       if (active) {
-                               if (strcmp(a->slab->name, active) == 0) {
-                                       printf(" %s", a->name);
-                                       continue;
-                               }
-                       }
-                       printf("\n%-12s <- %s", a->slab->name, a->name);
-                       active = a->slab->name;
-               }
-               else
-                       printf("%-20s -> %s\n", a->name, a->slab->name);
-       }
-       if (active)
-               printf("\n");
-}
-
-
-static void rename_slabs(void)
-{
-       struct slabinfo *s;
-       struct aliasinfo *a;
-
-       for (s = slabinfo; s < slabinfo + slabs; s++) {
-               if (*s->name != ':')
-                       continue;
-
-               if (s->refs > 1 && !show_first_alias)
-                       continue;
-
-               a = find_one_alias(s);
-
-               if (a)
-                       s->name = a->name;
-               else {
-                       s->name = "*";
-                       actual_slabs--;
-               }
-       }
-}
-
-static int slab_mismatch(char *slab)
-{
-       return regexec(&pattern, slab, 0, NULL, 0);
-}
-
-static void read_slab_dir(void)
-{
-       DIR *dir;
-       struct dirent *de;
-       struct slabinfo *slab = slabinfo;
-       struct aliasinfo *alias = aliasinfo;
-       char *p;
-       char *t;
-       int count;
-
-       if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
-               fatal("SYSFS support for SLUB not active\n");
-
-       dir = opendir(".");
-       while ((de = readdir(dir))) {
-               if (de->d_name[0] == '.' ||
-                       (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
-                               continue;
-               switch (de->d_type) {
-                  case DT_LNK:
-                       alias->name = strdup(de->d_name);
-                       count = readlink(de->d_name, buffer, sizeof(buffer)-1);
-
-                       if (count < 0)
-                               fatal("Cannot read symlink %s\n", de->d_name);
-
-                       buffer[count] = 0;
-                       p = buffer + count;
-                       while (p > buffer && p[-1] != '/')
-                               p--;
-                       alias->ref = strdup(p);
-                       alias++;
-                       break;
-                  case DT_DIR:
-                       if (chdir(de->d_name))
-                               fatal("Unable to access slab %s\n", slab->name);
-                       slab->name = strdup(de->d_name);
-                       slab->alias = 0;
-                       slab->refs = 0;
-                       slab->aliases = get_obj("aliases");
-                       slab->align = get_obj("align");
-                       slab->cache_dma = get_obj("cache_dma");
-                       slab->cpu_slabs = get_obj("cpu_slabs");
-                       slab->destroy_by_rcu = get_obj("destroy_by_rcu");
-                       slab->hwcache_align = get_obj("hwcache_align");
-                       slab->object_size = get_obj("object_size");
-                       slab->objects = get_obj("objects");
-                       slab->objects_partial = get_obj("objects_partial");
-                       slab->objects_total = get_obj("objects_total");
-                       slab->objs_per_slab = get_obj("objs_per_slab");
-                       slab->order = get_obj("order");
-                       slab->partial = get_obj("partial");
-                       slab->partial = get_obj_and_str("partial", &t);
-                       decode_numa_list(slab->numa_partial, t);
-                       free(t);
-                       slab->poison = get_obj("poison");
-                       slab->reclaim_account = get_obj("reclaim_account");
-                       slab->red_zone = get_obj("red_zone");
-                       slab->sanity_checks = get_obj("sanity_checks");
-                       slab->slab_size = get_obj("slab_size");
-                       slab->slabs = get_obj_and_str("slabs", &t);
-                       decode_numa_list(slab->numa, t);
-                       free(t);
-                       slab->store_user = get_obj("store_user");
-                       slab->trace = get_obj("trace");
-                       slab->alloc_fastpath = get_obj("alloc_fastpath");
-                       slab->alloc_slowpath = get_obj("alloc_slowpath");
-                       slab->free_fastpath = get_obj("free_fastpath");
-                       slab->free_slowpath = get_obj("free_slowpath");
-                       slab->free_frozen= get_obj("free_frozen");
-                       slab->free_add_partial = get_obj("free_add_partial");
-                       slab->free_remove_partial = get_obj("free_remove_partial");
-                       slab->alloc_from_partial = get_obj("alloc_from_partial");
-                       slab->alloc_slab = get_obj("alloc_slab");
-                       slab->alloc_refill = get_obj("alloc_refill");
-                       slab->free_slab = get_obj("free_slab");
-                       slab->cpuslab_flush = get_obj("cpuslab_flush");
-                       slab->deactivate_full = get_obj("deactivate_full");
-                       slab->deactivate_empty = get_obj("deactivate_empty");
-                       slab->deactivate_to_head = get_obj("deactivate_to_head");
-                       slab->deactivate_to_tail = get_obj("deactivate_to_tail");
-                       slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
-                       slab->order_fallback = get_obj("order_fallback");
-                       slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
-                       slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
-                       slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
-                       slab->cpu_partial_free = get_obj("cpu_partial_free");
-                       slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
-                       slab->deactivate_bypass = get_obj("deactivate_bypass");
-                       chdir("..");
-                       if (slab->name[0] == ':')
-                               alias_targets++;
-                       slab++;
-                       break;
-                  default :
-                       fatal("Unknown file type %lx\n", de->d_type);
-               }
-       }
-       closedir(dir);
-       slabs = slab - slabinfo;
-       actual_slabs = slabs;
-       aliases = alias - aliasinfo;
-       if (slabs > MAX_SLABS)
-               fatal("Too many slabs\n");
-       if (aliases > MAX_ALIASES)
-               fatal("Too many aliases\n");
-}
-
-static void output_slabs(void)
-{
-       struct slabinfo *slab;
-
-       for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
-
-               if (slab->alias)
-                       continue;
-
-
-               if (show_numa)
-                       slab_numa(slab, 0);
-               else if (show_track)
-                       show_tracking(slab);
-               else if (validate)
-                       slab_validate(slab);
-               else if (shrink)
-                       slab_shrink(slab);
-               else if (set_debug)
-                       slab_debug(slab);
-               else if (show_ops)
-                       ops(slab);
-               else if (show_slab)
-                       slabcache(slab);
-               else if (show_report)
-                       report(slab);
-       }
-}
-
-struct option opts[] = {
-       { "aliases", 0, NULL, 'a' },
-       { "activity", 0, NULL, 'A' },
-       { "debug", 2, NULL, 'd' },
-       { "display-activity", 0, NULL, 'D' },
-       { "empty", 0, NULL, 'e' },
-       { "first-alias", 0, NULL, 'f' },
-       { "help", 0, NULL, 'h' },
-       { "inverted", 0, NULL, 'i'},
-       { "numa", 0, NULL, 'n' },
-       { "ops", 0, NULL, 'o' },
-       { "report", 0, NULL, 'r' },
-       { "shrink", 0, NULL, 's' },
-       { "slabs", 0, NULL, 'l' },
-       { "track", 0, NULL, 't'},
-       { "validate", 0, NULL, 'v' },
-       { "zero", 0, NULL, 'z' },
-       { "1ref", 0, NULL, '1'},
-       { NULL, 0, NULL, 0 }
-};
-
-int main(int argc, char *argv[])
-{
-       int c;
-       int err;
-       char *pattern_source;
-
-       page_size = getpagesize();
-
-       while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
-                                               opts, NULL)) != -1)
-               switch (c) {
-               case '1':
-                       show_single_ref = 1;
-                       break;
-               case 'a':
-                       show_alias = 1;
-                       break;
-               case 'A':
-                       sort_active = 1;
-                       break;
-               case 'd':
-                       set_debug = 1;
-                       if (!debug_opt_scan(optarg))
-                               fatal("Invalid debug option '%s'\n", optarg);
-                       break;
-               case 'D':
-                       show_activity = 1;
-                       break;
-               case 'e':
-                       show_empty = 1;
-                       break;
-               case 'f':
-                       show_first_alias = 1;
-                       break;
-               case 'h':
-                       usage();
-                       return 0;
-               case 'i':
-                       show_inverted = 1;
-                       break;
-               case 'n':
-                       show_numa = 1;
-                       break;
-               case 'o':
-                       show_ops = 1;
-                       break;
-               case 'r':
-                       show_report = 1;
-                       break;
-               case 's':
-                       shrink = 1;
-                       break;
-               case 'l':
-                       show_slab = 1;
-                       break;
-               case 't':
-                       show_track = 1;
-                       break;
-               case 'v':
-                       validate = 1;
-                       break;
-               case 'z':
-                       skip_zero = 0;
-                       break;
-               case 'T':
-                       show_totals = 1;
-                       break;
-               case 'S':
-                       sort_size = 1;
-                       break;
-
-               default:
-                       fatal("%s: Invalid option '%c'\n", argv[0], optopt);
-
-       }
-
-       if (!show_slab && !show_alias && !show_track && !show_report
-               && !validate && !shrink && !set_debug && !show_ops)
-                       show_slab = 1;
-
-       if (argc > optind)
-               pattern_source = argv[optind];
-       else
-               pattern_source = ".*";
-
-       err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
-       if (err)
-               fatal("%s: Invalid pattern '%s' code %d\n",
-                       argv[0], pattern_source, err);
-       read_slab_dir();
-       if (show_alias)
-               alias();
-       else
-       if (show_totals)
-               totals();
-       else {
-               link_slabs();
-               rename_slabs();
-               sort_slabs();
-               output_slabs();
-       }
-       return 0;
-}
index 3823d4b1fa75912b91b0fc0ed9f0b244f0847b5a..8e30e5c40f8a2ebc0f9a15feb10d776bbb0ec030 100644 (file)
@@ -3,9 +3,9 @@
 CC = $(CROSS_COMPILE)gcc
 CFLAGS = -Wall -Wextra
 
-all: page-types
+all: page-types slabinfo
 %: %.c
        $(CC) $(CFLAGS) -o $@ $^
 
 clean:
-       $(RM) page-types
+       $(RM) page-types slabinfo
diff --git a/tools/vm/slabinfo.c b/tools/vm/slabinfo.c
new file mode 100644 (file)
index 0000000..164cbcf
--- /dev/null
@@ -0,0 +1,1393 @@
+/*
+ * Slabinfo: Tool to get reports about slabs
+ *
+ * (C) 2007 sgi, Christoph Lameter
+ * (C) 2011 Linux Foundation, Christoph Lameter
+ *
+ * Compile with:
+ *
+ * gcc -o slabinfo slabinfo.c
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <strings.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <getopt.h>
+#include <regex.h>
+#include <errno.h>
+
+#define MAX_SLABS 500
+#define MAX_ALIASES 500
+#define MAX_NODES 1024
+
+struct slabinfo {
+       char *name;
+       int alias;
+       int refs;
+       int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
+       int hwcache_align, object_size, objs_per_slab;
+       int sanity_checks, slab_size, store_user, trace;
+       int order, poison, reclaim_account, red_zone;
+       unsigned long partial, objects, slabs, objects_partial, objects_total;
+       unsigned long alloc_fastpath, alloc_slowpath;
+       unsigned long free_fastpath, free_slowpath;
+       unsigned long free_frozen, free_add_partial, free_remove_partial;
+       unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
+       unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
+       unsigned long deactivate_to_head, deactivate_to_tail;
+       unsigned long deactivate_remote_frees, order_fallback;
+       unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
+       unsigned long alloc_node_mismatch, deactivate_bypass;
+       unsigned long cpu_partial_alloc, cpu_partial_free;
+       int numa[MAX_NODES];
+       int numa_partial[MAX_NODES];
+} slabinfo[MAX_SLABS];
+
+struct aliasinfo {
+       char *name;
+       char *ref;
+       struct slabinfo *slab;
+} aliasinfo[MAX_ALIASES];
+
+int slabs = 0;
+int actual_slabs = 0;
+int aliases = 0;
+int alias_targets = 0;
+int highest_node = 0;
+
+char buffer[4096];
+
+int show_empty = 0;
+int show_report = 0;
+int show_alias = 0;
+int show_slab = 0;
+int skip_zero = 1;
+int show_numa = 0;
+int show_track = 0;
+int show_first_alias = 0;
+int validate = 0;
+int shrink = 0;
+int show_inverted = 0;
+int show_single_ref = 0;
+int show_totals = 0;
+int sort_size = 0;
+int sort_active = 0;
+int set_debug = 0;
+int show_ops = 0;
+int show_activity = 0;
+
+/* Debug options */
+int sanity = 0;
+int redzone = 0;
+int poison = 0;
+int tracking = 0;
+int tracing = 0;
+
+int page_size;
+
+regex_t pattern;
+
+static void fatal(const char *x, ...)
+{
+       va_list ap;
+
+       va_start(ap, x);
+       vfprintf(stderr, x, ap);
+       va_end(ap);
+       exit(EXIT_FAILURE);
+}
+
+static void usage(void)
+{
+       printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
+               "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
+               "-a|--aliases           Show aliases\n"
+               "-A|--activity          Most active slabs first\n"
+               "-d<options>|--debug=<options> Set/Clear Debug options\n"
+               "-D|--display-active    Switch line format to activity\n"
+               "-e|--empty             Show empty slabs\n"
+               "-f|--first-alias       Show first alias\n"
+               "-h|--help              Show usage information\n"
+               "-i|--inverted          Inverted list\n"
+               "-l|--slabs             Show slabs\n"
+               "-n|--numa              Show NUMA information\n"
+               "-o|--ops               Show kmem_cache_ops\n"
+               "-s|--shrink            Shrink slabs\n"
+               "-r|--report            Detailed report on single slabs\n"
+               "-S|--Size              Sort by size\n"
+               "-t|--tracking          Show alloc/free information\n"
+               "-T|--Totals            Show summary information\n"
+               "-v|--validate          Validate slabs\n"
+               "-z|--zero              Include empty slabs\n"
+               "-1|--1ref              Single reference\n"
+               "\nValid debug options (FZPUT may be combined)\n"
+               "a / A          Switch on all debug options (=FZUP)\n"
+               "-              Switch off all debug options\n"
+               "f / F          Sanity Checks (SLAB_DEBUG_FREE)\n"
+               "z / Z          Redzoning\n"
+               "p / P          Poisoning\n"
+               "u / U          Tracking\n"
+               "t / T          Tracing\n"
+       );
+}
+
+static unsigned long read_obj(const char *name)
+{
+       FILE *f = fopen(name, "r");
+
+       if (!f)
+               buffer[0] = 0;
+       else {
+               if (!fgets(buffer, sizeof(buffer), f))
+                       buffer[0] = 0;
+               fclose(f);
+               if (buffer[strlen(buffer)] == '\n')
+                       buffer[strlen(buffer)] = 0;
+       }
+       return strlen(buffer);
+}
+
+
+/*
+ * Get the contents of an attribute
+ */
+static unsigned long get_obj(const char *name)
+{
+       if (!read_obj(name))
+               return 0;
+
+       return atol(buffer);
+}
+
+static unsigned long get_obj_and_str(const char *name, char **x)
+{
+       unsigned long result = 0;
+       char *p;
+
+       *x = NULL;
+
+       if (!read_obj(name)) {
+               x = NULL;
+               return 0;
+       }
+       result = strtoul(buffer, &p, 10);
+       while (*p == ' ')
+               p++;
+       if (*p)
+               *x = strdup(p);
+       return result;
+}
+
+static void set_obj(struct slabinfo *s, const char *name, int n)
+{
+       char x[100];
+       FILE *f;
+
+       snprintf(x, 100, "%s/%s", s->name, name);
+       f = fopen(x, "w");
+       if (!f)
+               fatal("Cannot write to %s\n", x);
+
+       fprintf(f, "%d\n", n);
+       fclose(f);
+}
+
+static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
+{
+       char x[100];
+       FILE *f;
+       size_t l;
+
+       snprintf(x, 100, "%s/%s", s->name, name);
+       f = fopen(x, "r");
+       if (!f) {
+               buffer[0] = 0;
+               l = 0;
+       } else {
+               l = fread(buffer, 1, sizeof(buffer), f);
+               buffer[l] = 0;
+               fclose(f);
+       }
+       return l;
+}
+
+
+/*
+ * Put a size string together
+ */
+static int store_size(char *buffer, unsigned long value)
+{
+       unsigned long divisor = 1;
+       char trailer = 0;
+       int n;
+
+       if (value > 1000000000UL) {
+               divisor = 100000000UL;
+               trailer = 'G';
+       } else if (value > 1000000UL) {
+               divisor = 100000UL;
+               trailer = 'M';
+       } else if (value > 1000UL) {
+               divisor = 100;
+               trailer = 'K';
+       }
+
+       value /= divisor;
+       n = sprintf(buffer, "%ld",value);
+       if (trailer) {
+               buffer[n] = trailer;
+               n++;
+               buffer[n] = 0;
+       }
+       if (divisor != 1) {
+               memmove(buffer + n - 2, buffer + n - 3, 4);
+               buffer[n-2] = '.';
+               n++;
+       }
+       return n;
+}
+
+static void decode_numa_list(int *numa, char *t)
+{
+       int node;
+       int nr;
+
+       memset(numa, 0, MAX_NODES * sizeof(int));
+
+       if (!t)
+               return;
+
+       while (*t == 'N') {
+               t++;
+               node = strtoul(t, &t, 10);
+               if (*t == '=') {
+                       t++;
+                       nr = strtoul(t, &t, 10);
+                       numa[node] = nr;
+                       if (node > highest_node)
+                               highest_node = node;
+               }
+               while (*t == ' ')
+                       t++;
+       }
+}
+
+static void slab_validate(struct slabinfo *s)
+{
+       if (strcmp(s->name, "*") == 0)
+               return;
+
+       set_obj(s, "validate", 1);
+}
+
+static void slab_shrink(struct slabinfo *s)
+{
+       if (strcmp(s->name, "*") == 0)
+               return;
+
+       set_obj(s, "shrink", 1);
+}
+
+int line = 0;
+
+static void first_line(void)
+{
+       if (show_activity)
+               printf("Name                   Objects      Alloc       Free   %%Fast Fallb O CmpX   UL\n");
+       else
+               printf("Name                   Objects Objsize    Space "
+                       "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
+}
+
+/*
+ * Find the shortest alias of a slab
+ */
+static struct aliasinfo *find_one_alias(struct slabinfo *find)
+{
+       struct aliasinfo *a;
+       struct aliasinfo *best = NULL;
+
+       for(a = aliasinfo;a < aliasinfo + aliases; a++) {
+               if (a->slab == find &&
+                       (!best || strlen(best->name) < strlen(a->name))) {
+                               best = a;
+                               if (strncmp(a->name,"kmall", 5) == 0)
+                                       return best;
+                       }
+       }
+       return best;
+}
+
+static unsigned long slab_size(struct slabinfo *s)
+{
+       return  s->slabs * (page_size << s->order);
+}
+
+static unsigned long slab_activity(struct slabinfo *s)
+{
+       return  s->alloc_fastpath + s->free_fastpath +
+               s->alloc_slowpath + s->free_slowpath;
+}
+
+static void slab_numa(struct slabinfo *s, int mode)
+{
+       int node;
+
+       if (strcmp(s->name, "*") == 0)
+               return;
+
+       if (!highest_node) {
+               printf("\n%s: No NUMA information available.\n", s->name);
+               return;
+       }
+
+       if (skip_zero && !s->slabs)
+               return;
+
+       if (!line) {
+               printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
+               for(node = 0; node <= highest_node; node++)
+                       printf(" %4d", node);
+               printf("\n----------------------");
+               for(node = 0; node <= highest_node; node++)
+                       printf("-----");
+               printf("\n");
+       }
+       printf("%-21s ", mode ? "All slabs" : s->name);
+       for(node = 0; node <= highest_node; node++) {
+               char b[20];
+
+               store_size(b, s->numa[node]);
+               printf(" %4s", b);
+       }
+       printf("\n");
+       if (mode) {
+               printf("%-21s ", "Partial slabs");
+               for(node = 0; node <= highest_node; node++) {
+                       char b[20];
+
+                       store_size(b, s->numa_partial[node]);
+                       printf(" %4s", b);
+               }
+               printf("\n");
+       }
+       line++;
+}
+
+static void show_tracking(struct slabinfo *s)
+{
+       printf("\n%s: Kernel object allocation\n", s->name);
+       printf("-----------------------------------------------------------------------\n");
+       if (read_slab_obj(s, "alloc_calls"))
+               printf("%s", buffer);
+       else
+               printf("No Data\n");
+
+       printf("\n%s: Kernel object freeing\n", s->name);
+       printf("------------------------------------------------------------------------\n");
+       if (read_slab_obj(s, "free_calls"))
+               printf("%s", buffer);
+       else
+               printf("No Data\n");
+
+}
+
+static void ops(struct slabinfo *s)
+{
+       if (strcmp(s->name, "*") == 0)
+               return;
+
+       if (read_slab_obj(s, "ops")) {
+               printf("\n%s: kmem_cache operations\n", s->name);
+               printf("--------------------------------------------\n");
+               printf("%s", buffer);
+       } else
+               printf("\n%s has no kmem_cache operations\n", s->name);
+}
+
+static const char *onoff(int x)
+{
+       if (x)
+               return "On ";
+       return "Off";
+}
+
+static void slab_stats(struct slabinfo *s)
+{
+       unsigned long total_alloc;
+       unsigned long total_free;
+       unsigned long total;
+
+       if (!s->alloc_slab)
+               return;
+
+       total_alloc = s->alloc_fastpath + s->alloc_slowpath;
+       total_free = s->free_fastpath + s->free_slowpath;
+
+       if (!total_alloc)
+               return;
+
+       printf("\n");
+       printf("Slab Perf Counter       Alloc     Free %%Al %%Fr\n");
+       printf("--------------------------------------------------\n");
+       printf("Fastpath             %8lu %8lu %3lu %3lu\n",
+               s->alloc_fastpath, s->free_fastpath,
+               s->alloc_fastpath * 100 / total_alloc,
+               s->free_fastpath * 100 / total_free);
+       printf("Slowpath             %8lu %8lu %3lu %3lu\n",
+               total_alloc - s->alloc_fastpath, s->free_slowpath,
+               (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
+               s->free_slowpath * 100 / total_free);
+       printf("Page Alloc           %8lu %8lu %3lu %3lu\n",
+               s->alloc_slab, s->free_slab,
+               s->alloc_slab * 100 / total_alloc,
+               s->free_slab * 100 / total_free);
+       printf("Add partial          %8lu %8lu %3lu %3lu\n",
+               s->deactivate_to_head + s->deactivate_to_tail,
+               s->free_add_partial,
+               (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
+               s->free_add_partial * 100 / total_free);
+       printf("Remove partial       %8lu %8lu %3lu %3lu\n",
+               s->alloc_from_partial, s->free_remove_partial,
+               s->alloc_from_partial * 100 / total_alloc,
+               s->free_remove_partial * 100 / total_free);
+
+       printf("Cpu partial list     %8lu %8lu %3lu %3lu\n",
+               s->cpu_partial_alloc, s->cpu_partial_free,
+               s->cpu_partial_alloc * 100 / total_alloc,
+               s->cpu_partial_free * 100 / total_free);
+
+       printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
+               s->deactivate_remote_frees, s->free_frozen,
+               s->deactivate_remote_frees * 100 / total_alloc,
+               s->free_frozen * 100 / total_free);
+
+       printf("Total                %8lu %8lu\n\n", total_alloc, total_free);
+
+       if (s->cpuslab_flush)
+               printf("Flushes %8lu\n", s->cpuslab_flush);
+
+       total = s->deactivate_full + s->deactivate_empty +
+                       s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
+
+       if (total) {
+               printf("\nSlab Deactivation             Ocurrences  %%\n");
+               printf("-------------------------------------------------\n");
+               printf("Slab full                     %7lu  %3lu%%\n",
+                       s->deactivate_full, (s->deactivate_full * 100) / total);
+               printf("Slab empty                    %7lu  %3lu%%\n",
+                       s->deactivate_empty, (s->deactivate_empty * 100) / total);
+               printf("Moved to head of partial list %7lu  %3lu%%\n",
+                       s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
+               printf("Moved to tail of partial list %7lu  %3lu%%\n",
+                       s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
+               printf("Deactivation bypass           %7lu  %3lu%%\n",
+                       s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
+               printf("Refilled from foreign frees   %7lu  %3lu%%\n",
+                       s->alloc_refill, (s->alloc_refill * 100) / total);
+               printf("Node mismatch                 %7lu  %3lu%%\n",
+                       s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
+       }
+
+       if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail)
+               printf("\nCmpxchg_double Looping\n------------------------\n");
+               printf("Locked Cmpxchg Double redos   %lu\nUnlocked Cmpxchg Double redos %lu\n",
+                       s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
+}
+
+static void report(struct slabinfo *s)
+{
+       if (strcmp(s->name, "*") == 0)
+               return;
+
+       printf("\nSlabcache: %-20s  Aliases: %2d Order : %2d Objects: %lu\n",
+               s->name, s->aliases, s->order, s->objects);
+       if (s->hwcache_align)
+               printf("** Hardware cacheline aligned\n");
+       if (s->cache_dma)
+               printf("** Memory is allocated in a special DMA zone\n");
+       if (s->destroy_by_rcu)
+               printf("** Slabs are destroyed via RCU\n");
+       if (s->reclaim_account)
+               printf("** Reclaim accounting active\n");
+
+       printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
+       printf("------------------------------------------------------------------------\n");
+       printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
+                       s->object_size, s->slabs, onoff(s->sanity_checks),
+                       s->slabs * (page_size << s->order));
+       printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
+                       s->slab_size, s->slabs - s->partial - s->cpu_slabs,
+                       onoff(s->red_zone), s->objects * s->object_size);
+       printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
+                       page_size << s->order, s->partial, onoff(s->poison),
+                       s->slabs * (page_size << s->order) - s->objects * s->object_size);
+       printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
+                       s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
+                       (s->slab_size - s->object_size) * s->objects);
+       printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
+                       s->align, s->objs_per_slab, onoff(s->trace),
+                       ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
+                       s->slabs);
+
+       ops(s);
+       show_tracking(s);
+       slab_numa(s, 1);
+       slab_stats(s);
+}
+
+static void slabcache(struct slabinfo *s)
+{
+       char size_str[20];
+       char dist_str[40];
+       char flags[20];
+       char *p = flags;
+
+       if (strcmp(s->name, "*") == 0)
+               return;
+
+       if (actual_slabs == 1) {
+               report(s);
+               return;
+       }
+
+       if (skip_zero && !show_empty && !s->slabs)
+               return;
+
+       if (show_empty && s->slabs)
+               return;
+
+       store_size(size_str, slab_size(s));
+       snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
+                                               s->partial, s->cpu_slabs);
+
+       if (!line++)
+               first_line();
+
+       if (s->aliases)
+               *p++ = '*';
+       if (s->cache_dma)
+               *p++ = 'd';
+       if (s->hwcache_align)
+               *p++ = 'A';
+       if (s->poison)
+               *p++ = 'P';
+       if (s->reclaim_account)
+               *p++ = 'a';
+       if (s->red_zone)
+               *p++ = 'Z';
+       if (s->sanity_checks)
+               *p++ = 'F';
+       if (s->store_user)
+               *p++ = 'U';
+       if (s->trace)
+               *p++ = 'T';
+
+       *p = 0;
+       if (show_activity) {
+               unsigned long total_alloc;
+               unsigned long total_free;
+
+               total_alloc = s->alloc_fastpath + s->alloc_slowpath;
+               total_free = s->free_fastpath + s->free_slowpath;
+
+               printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
+                       s->name, s->objects,
+                       total_alloc, total_free,
+                       total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
+                       total_free ? (s->free_fastpath * 100 / total_free) : 0,
+                       s->order_fallback, s->order, s->cmpxchg_double_fail,
+                       s->cmpxchg_double_cpu_fail);
+       }
+       else
+               printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
+                       s->name, s->objects, s->object_size, size_str, dist_str,
+                       s->objs_per_slab, s->order,
+                       s->slabs ? (s->partial * 100) / s->slabs : 100,
+                       s->slabs ? (s->objects * s->object_size * 100) /
+                               (s->slabs * (page_size << s->order)) : 100,
+                       flags);
+}
+
+/*
+ * Analyze debug options. Return false if something is amiss.
+ */
+static int debug_opt_scan(char *opt)
+{
+       if (!opt || !opt[0] || strcmp(opt, "-") == 0)
+               return 1;
+
+       if (strcasecmp(opt, "a") == 0) {
+               sanity = 1;
+               poison = 1;
+               redzone = 1;
+               tracking = 1;
+               return 1;
+       }
+
+       for ( ; *opt; opt++)
+               switch (*opt) {
+               case 'F' : case 'f':
+                       if (sanity)
+                               return 0;
+                       sanity = 1;
+                       break;
+               case 'P' : case 'p':
+                       if (poison)
+                               return 0;
+                       poison = 1;
+                       break;
+
+               case 'Z' : case 'z':
+                       if (redzone)
+                               return 0;
+                       redzone = 1;
+                       break;
+
+               case 'U' : case 'u':
+                       if (tracking)
+                               return 0;
+                       tracking = 1;
+                       break;
+
+               case 'T' : case 't':
+                       if (tracing)
+                               return 0;
+                       tracing = 1;
+                       break;
+               default:
+                       return 0;
+               }
+       return 1;
+}
+
+static int slab_empty(struct slabinfo *s)
+{
+       if (s->objects > 0)
+               return 0;
+
+       /*
+        * We may still have slabs even if there are no objects. Shrinking will
+        * remove them.
+        */
+       if (s->slabs != 0)
+               set_obj(s, "shrink", 1);
+
+       return 1;
+}
+
+static void slab_debug(struct slabinfo *s)
+{
+       if (strcmp(s->name, "*") == 0)
+               return;
+
+       if (sanity && !s->sanity_checks) {
+               set_obj(s, "sanity", 1);
+       }
+       if (!sanity && s->sanity_checks) {
+               if (slab_empty(s))
+                       set_obj(s, "sanity", 0);
+               else
+                       fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
+       }
+       if (redzone && !s->red_zone) {
+               if (slab_empty(s))
+                       set_obj(s, "red_zone", 1);
+               else
+                       fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
+       }
+       if (!redzone && s->red_zone) {
+               if (slab_empty(s))
+                       set_obj(s, "red_zone", 0);
+               else
+                       fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
+       }
+       if (poison && !s->poison) {
+               if (slab_empty(s))
+                       set_obj(s, "poison", 1);
+               else
+                       fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
+       }
+       if (!poison && s->poison) {
+               if (slab_empty(s))
+                       set_obj(s, "poison", 0);
+               else
+                       fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
+       }
+       if (tracking && !s->store_user) {
+               if (slab_empty(s))
+                       set_obj(s, "store_user", 1);
+               else
+                       fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
+       }
+       if (!tracking && s->store_user) {
+               if (slab_empty(s))
+                       set_obj(s, "store_user", 0);
+               else
+                       fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
+       }
+       if (tracing && !s->trace) {
+               if (slabs == 1)
+                       set_obj(s, "trace", 1);
+               else
+                       fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
+       }
+       if (!tracing && s->trace)
+               set_obj(s, "trace", 1);
+}
+
+static void totals(void)
+{
+       struct slabinfo *s;
+
+       int used_slabs = 0;
+       char b1[20], b2[20], b3[20], b4[20];
+       unsigned long long max = 1ULL << 63;
+
+       /* Object size */
+       unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
+
+       /* Number of partial slabs in a slabcache */
+       unsigned long long min_partial = max, max_partial = 0,
+                               avg_partial, total_partial = 0;
+
+       /* Number of slabs in a slab cache */
+       unsigned long long min_slabs = max, max_slabs = 0,
+                               avg_slabs, total_slabs = 0;
+
+       /* Size of the whole slab */
+       unsigned long long min_size = max, max_size = 0,
+                               avg_size, total_size = 0;
+
+       /* Bytes used for object storage in a slab */
+       unsigned long long min_used = max, max_used = 0,
+                               avg_used, total_used = 0;
+
+       /* Waste: Bytes used for alignment and padding */
+       unsigned long long min_waste = max, max_waste = 0,
+                               avg_waste, total_waste = 0;
+       /* Number of objects in a slab */
+       unsigned long long min_objects = max, max_objects = 0,
+                               avg_objects, total_objects = 0;
+       /* Waste per object */
+       unsigned long long min_objwaste = max,
+                               max_objwaste = 0, avg_objwaste,
+                               total_objwaste = 0;
+
+       /* Memory per object */
+       unsigned long long min_memobj = max,
+                               max_memobj = 0, avg_memobj,
+                               total_objsize = 0;
+
+       /* Percentage of partial slabs per slab */
+       unsigned long min_ppart = 100, max_ppart = 0,
+                               avg_ppart, total_ppart = 0;
+
+       /* Number of objects in partial slabs */
+       unsigned long min_partobj = max, max_partobj = 0,
+                               avg_partobj, total_partobj = 0;
+
+       /* Percentage of partial objects of all objects in a slab */
+       unsigned long min_ppartobj = 100, max_ppartobj = 0,
+                               avg_ppartobj, total_ppartobj = 0;
+
+
+       for (s = slabinfo; s < slabinfo + slabs; s++) {
+               unsigned long long size;
+               unsigned long used;
+               unsigned long long wasted;
+               unsigned long long objwaste;
+               unsigned long percentage_partial_slabs;
+               unsigned long percentage_partial_objs;
+
+               if (!s->slabs || !s->objects)
+                       continue;
+
+               used_slabs++;
+
+               size = slab_size(s);
+               used = s->objects * s->object_size;
+               wasted = size - used;
+               objwaste = s->slab_size - s->object_size;
+
+               percentage_partial_slabs = s->partial * 100 / s->slabs;
+               if (percentage_partial_slabs > 100)
+                       percentage_partial_slabs = 100;
+
+               percentage_partial_objs = s->objects_partial * 100
+                                                       / s->objects;
+
+               if (percentage_partial_objs > 100)
+                       percentage_partial_objs = 100;
+
+               if (s->object_size < min_objsize)
+                       min_objsize = s->object_size;
+               if (s->partial < min_partial)
+                       min_partial = s->partial;
+               if (s->slabs < min_slabs)
+                       min_slabs = s->slabs;
+               if (size < min_size)
+                       min_size = size;
+               if (wasted < min_waste)
+                       min_waste = wasted;
+               if (objwaste < min_objwaste)
+                       min_objwaste = objwaste;
+               if (s->objects < min_objects)
+                       min_objects = s->objects;
+               if (used < min_used)
+                       min_used = used;
+               if (s->objects_partial < min_partobj)
+                       min_partobj = s->objects_partial;
+               if (percentage_partial_slabs < min_ppart)
+                       min_ppart = percentage_partial_slabs;
+               if (percentage_partial_objs < min_ppartobj)
+                       min_ppartobj = percentage_partial_objs;
+               if (s->slab_size < min_memobj)
+                       min_memobj = s->slab_size;
+
+               if (s->object_size > max_objsize)
+                       max_objsize = s->object_size;
+               if (s->partial > max_partial)
+                       max_partial = s->partial;
+               if (s->slabs > max_slabs)
+                       max_slabs = s->slabs;
+               if (size > max_size)
+                       max_size = size;
+               if (wasted > max_waste)
+                       max_waste = wasted;
+               if (objwaste > max_objwaste)
+                       max_objwaste = objwaste;
+               if (s->objects > max_objects)
+                       max_objects = s->objects;
+               if (used > max_used)
+                       max_used = used;
+               if (s->objects_partial > max_partobj)
+                       max_partobj = s->objects_partial;
+               if (percentage_partial_slabs > max_ppart)
+                       max_ppart = percentage_partial_slabs;
+               if (percentage_partial_objs > max_ppartobj)
+                       max_ppartobj = percentage_partial_objs;
+               if (s->slab_size > max_memobj)
+                       max_memobj = s->slab_size;
+
+               total_partial += s->partial;
+               total_slabs += s->slabs;
+               total_size += size;
+               total_waste += wasted;
+
+               total_objects += s->objects;
+               total_used += used;
+               total_partobj += s->objects_partial;
+               total_ppart += percentage_partial_slabs;
+               total_ppartobj += percentage_partial_objs;
+
+               total_objwaste += s->objects * objwaste;
+               total_objsize += s->objects * s->slab_size;
+       }
+
+       if (!total_objects) {
+               printf("No objects\n");
+               return;
+       }
+       if (!used_slabs) {
+               printf("No slabs\n");
+               return;
+       }
+
+       /* Per slab averages */
+       avg_partial = total_partial / used_slabs;
+       avg_slabs = total_slabs / used_slabs;
+       avg_size = total_size / used_slabs;
+       avg_waste = total_waste / used_slabs;
+
+       avg_objects = total_objects / used_slabs;
+       avg_used = total_used / used_slabs;
+       avg_partobj = total_partobj / used_slabs;
+       avg_ppart = total_ppart / used_slabs;
+       avg_ppartobj = total_ppartobj / used_slabs;
+
+       /* Per object object sizes */
+       avg_objsize = total_used / total_objects;
+       avg_objwaste = total_objwaste / total_objects;
+       avg_partobj = total_partobj * 100 / total_objects;
+       avg_memobj = total_objsize / total_objects;
+
+       printf("Slabcache Totals\n");
+       printf("----------------\n");
+       printf("Slabcaches : %3d      Aliases  : %3d->%-3d Active: %3d\n",
+                       slabs, aliases, alias_targets, used_slabs);
+
+       store_size(b1, total_size);store_size(b2, total_waste);
+       store_size(b3, total_waste * 100 / total_used);
+       printf("Memory used: %6s   # Loss   : %6s   MRatio:%6s%%\n", b1, b2, b3);
+
+       store_size(b1, total_objects);store_size(b2, total_partobj);
+       store_size(b3, total_partobj * 100 / total_objects);
+       printf("# Objects  : %6s   # PartObj: %6s   ORatio:%6s%%\n", b1, b2, b3);
+
+       printf("\n");
+       printf("Per Cache    Average         Min         Max       Total\n");
+       printf("---------------------------------------------------------\n");
+
+       store_size(b1, avg_objects);store_size(b2, min_objects);
+       store_size(b3, max_objects);store_size(b4, total_objects);
+       printf("#Objects  %10s  %10s  %10s  %10s\n",
+                       b1,     b2,     b3,     b4);
+
+       store_size(b1, avg_slabs);store_size(b2, min_slabs);
+       store_size(b3, max_slabs);store_size(b4, total_slabs);
+       printf("#Slabs    %10s  %10s  %10s  %10s\n",
+                       b1,     b2,     b3,     b4);
+
+       store_size(b1, avg_partial);store_size(b2, min_partial);
+       store_size(b3, max_partial);store_size(b4, total_partial);
+       printf("#PartSlab %10s  %10s  %10s  %10s\n",
+                       b1,     b2,     b3,     b4);
+       store_size(b1, avg_ppart);store_size(b2, min_ppart);
+       store_size(b3, max_ppart);
+       store_size(b4, total_partial * 100  / total_slabs);
+       printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
+                       b1,     b2,     b3,     b4);
+
+       store_size(b1, avg_partobj);store_size(b2, min_partobj);
+       store_size(b3, max_partobj);
+       store_size(b4, total_partobj);
+       printf("PartObjs  %10s  %10s  %10s  %10s\n",
+                       b1,     b2,     b3,     b4);
+
+       store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
+       store_size(b3, max_ppartobj);
+       store_size(b4, total_partobj * 100 / total_objects);
+       printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
+                       b1,     b2,     b3,     b4);
+
+       store_size(b1, avg_size);store_size(b2, min_size);
+       store_size(b3, max_size);store_size(b4, total_size);
+       printf("Memory    %10s  %10s  %10s  %10s\n",
+                       b1,     b2,     b3,     b4);
+
+       store_size(b1, avg_used);store_size(b2, min_used);
+       store_size(b3, max_used);store_size(b4, total_used);
+       printf("Used      %10s  %10s  %10s  %10s\n",
+                       b1,     b2,     b3,     b4);
+
+       store_size(b1, avg_waste);store_size(b2, min_waste);
+       store_size(b3, max_waste);store_size(b4, total_waste);
+       printf("Loss      %10s  %10s  %10s  %10s\n",
+                       b1,     b2,     b3,     b4);
+
+       printf("\n");
+       printf("Per Object   Average         Min         Max\n");
+       printf("---------------------------------------------\n");
+
+       store_size(b1, avg_memobj);store_size(b2, min_memobj);
+       store_size(b3, max_memobj);
+       printf("Memory    %10s  %10s  %10s\n",
+                       b1,     b2,     b3);
+       store_size(b1, avg_objsize);store_size(b2, min_objsize);
+       store_size(b3, max_objsize);
+       printf("User      %10s  %10s  %10s\n",
+                       b1,     b2,     b3);
+
+       store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
+       store_size(b3, max_objwaste);
+       printf("Loss      %10s  %10s  %10s\n",
+                       b1,     b2,     b3);
+}
+
+static void sort_slabs(void)
+{
+       struct slabinfo *s1,*s2;
+
+       for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
+               for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
+                       int result;
+
+                       if (sort_size)
+                               result = slab_size(s1) < slab_size(s2);
+                       else if (sort_active)
+                               result = slab_activity(s1) < slab_activity(s2);
+                       else
+                               result = strcasecmp(s1->name, s2->name);
+
+                       if (show_inverted)
+                               result = -result;
+
+                       if (result > 0) {
+                               struct slabinfo t;
+
+                               memcpy(&t, s1, sizeof(struct slabinfo));
+                               memcpy(s1, s2, sizeof(struct slabinfo));
+                               memcpy(s2, &t, sizeof(struct slabinfo));
+                       }
+               }
+       }
+}
+
+static void sort_aliases(void)
+{
+       struct aliasinfo *a1,*a2;
+
+       for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
+               for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
+                       char *n1, *n2;
+
+                       n1 = a1->name;
+                       n2 = a2->name;
+                       if (show_alias && !show_inverted) {
+                               n1 = a1->ref;
+                               n2 = a2->ref;
+                       }
+                       if (strcasecmp(n1, n2) > 0) {
+                               struct aliasinfo t;
+
+                               memcpy(&t, a1, sizeof(struct aliasinfo));
+                               memcpy(a1, a2, sizeof(struct aliasinfo));
+                               memcpy(a2, &t, sizeof(struct aliasinfo));
+                       }
+               }
+       }
+}
+
+static void link_slabs(void)
+{
+       struct aliasinfo *a;
+       struct slabinfo *s;
+
+       for (a = aliasinfo; a < aliasinfo + aliases; a++) {
+
+               for (s = slabinfo; s < slabinfo + slabs; s++)
+                       if (strcmp(a->ref, s->name) == 0) {
+                               a->slab = s;
+                               s->refs++;
+                               break;
+                       }
+               if (s == slabinfo + slabs)
+                       fatal("Unresolved alias %s\n", a->ref);
+       }
+}
+
+static void alias(void)
+{
+       struct aliasinfo *a;
+       char *active = NULL;
+
+       sort_aliases();
+       link_slabs();
+
+       for(a = aliasinfo; a < aliasinfo + aliases; a++) {
+
+               if (!show_single_ref && a->slab->refs == 1)
+                       continue;
+
+               if (!show_inverted) {
+                       if (active) {
+                               if (strcmp(a->slab->name, active) == 0) {
+                                       printf(" %s", a->name);
+                                       continue;
+                               }
+                       }
+                       printf("\n%-12s <- %s", a->slab->name, a->name);
+                       active = a->slab->name;
+               }
+               else
+                       printf("%-20s -> %s\n", a->name, a->slab->name);
+       }
+       if (active)
+               printf("\n");
+}
+
+
+static void rename_slabs(void)
+{
+       struct slabinfo *s;
+       struct aliasinfo *a;
+
+       for (s = slabinfo; s < slabinfo + slabs; s++) {
+               if (*s->name != ':')
+                       continue;
+
+               if (s->refs > 1 && !show_first_alias)
+                       continue;
+
+               a = find_one_alias(s);
+
+               if (a)
+                       s->name = a->name;
+               else {
+                       s->name = "*";
+                       actual_slabs--;
+               }
+       }
+}
+
+static int slab_mismatch(char *slab)
+{
+       return regexec(&pattern, slab, 0, NULL, 0);
+}
+
+static void read_slab_dir(void)
+{
+       DIR *dir;
+       struct dirent *de;
+       struct slabinfo *slab = slabinfo;
+       struct aliasinfo *alias = aliasinfo;
+       char *p;
+       char *t;
+       int count;
+
+       if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
+               fatal("SYSFS support for SLUB not active\n");
+
+       dir = opendir(".");
+       while ((de = readdir(dir))) {
+               if (de->d_name[0] == '.' ||
+                       (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
+                               continue;
+               switch (de->d_type) {
+                  case DT_LNK:
+                       alias->name = strdup(de->d_name);
+                       count = readlink(de->d_name, buffer, sizeof(buffer)-1);
+
+                       if (count < 0)
+                               fatal("Cannot read symlink %s\n", de->d_name);
+
+                       buffer[count] = 0;
+                       p = buffer + count;
+                       while (p > buffer && p[-1] != '/')
+                               p--;
+                       alias->ref = strdup(p);
+                       alias++;
+                       break;
+                  case DT_DIR:
+                       if (chdir(de->d_name))
+                               fatal("Unable to access slab %s\n", slab->name);
+                       slab->name = strdup(de->d_name);
+                       slab->alias = 0;
+                       slab->refs = 0;
+                       slab->aliases = get_obj("aliases");
+                       slab->align = get_obj("align");
+                       slab->cache_dma = get_obj("cache_dma");
+                       slab->cpu_slabs = get_obj("cpu_slabs");
+                       slab->destroy_by_rcu = get_obj("destroy_by_rcu");
+                       slab->hwcache_align = get_obj("hwcache_align");
+                       slab->object_size = get_obj("object_size");
+                       slab->objects = get_obj("objects");
+                       slab->objects_partial = get_obj("objects_partial");
+                       slab->objects_total = get_obj("objects_total");
+                       slab->objs_per_slab = get_obj("objs_per_slab");
+                       slab->order = get_obj("order");
+                       slab->partial = get_obj("partial");
+                       slab->partial = get_obj_and_str("partial", &t);
+                       decode_numa_list(slab->numa_partial, t);
+                       free(t);
+                       slab->poison = get_obj("poison");
+                       slab->reclaim_account = get_obj("reclaim_account");
+                       slab->red_zone = get_obj("red_zone");
+                       slab->sanity_checks = get_obj("sanity_checks");
+                       slab->slab_size = get_obj("slab_size");
+                       slab->slabs = get_obj_and_str("slabs", &t);
+                       decode_numa_list(slab->numa, t);
+                       free(t);
+                       slab->store_user = get_obj("store_user");
+                       slab->trace = get_obj("trace");
+                       slab->alloc_fastpath = get_obj("alloc_fastpath");
+                       slab->alloc_slowpath = get_obj("alloc_slowpath");
+                       slab->free_fastpath = get_obj("free_fastpath");
+                       slab->free_slowpath = get_obj("free_slowpath");
+                       slab->free_frozen= get_obj("free_frozen");
+                       slab->free_add_partial = get_obj("free_add_partial");
+                       slab->free_remove_partial = get_obj("free_remove_partial");
+                       slab->alloc_from_partial = get_obj("alloc_from_partial");
+                       slab->alloc_slab = get_obj("alloc_slab");
+                       slab->alloc_refill = get_obj("alloc_refill");
+                       slab->free_slab = get_obj("free_slab");
+                       slab->cpuslab_flush = get_obj("cpuslab_flush");
+                       slab->deactivate_full = get_obj("deactivate_full");
+                       slab->deactivate_empty = get_obj("deactivate_empty");
+                       slab->deactivate_to_head = get_obj("deactivate_to_head");
+                       slab->deactivate_to_tail = get_obj("deactivate_to_tail");
+                       slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
+                       slab->order_fallback = get_obj("order_fallback");
+                       slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
+                       slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
+                       slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
+                       slab->cpu_partial_free = get_obj("cpu_partial_free");
+                       slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
+                       slab->deactivate_bypass = get_obj("deactivate_bypass");
+                       chdir("..");
+                       if (slab->name[0] == ':')
+                               alias_targets++;
+                       slab++;
+                       break;
+                  default :
+                       fatal("Unknown file type %lx\n", de->d_type);
+               }
+       }
+       closedir(dir);
+       slabs = slab - slabinfo;
+       actual_slabs = slabs;
+       aliases = alias - aliasinfo;
+       if (slabs > MAX_SLABS)
+               fatal("Too many slabs\n");
+       if (aliases > MAX_ALIASES)
+               fatal("Too many aliases\n");
+}
+
+static void output_slabs(void)
+{
+       struct slabinfo *slab;
+
+       for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
+
+               if (slab->alias)
+                       continue;
+
+
+               if (show_numa)
+                       slab_numa(slab, 0);
+               else if (show_track)
+                       show_tracking(slab);
+               else if (validate)
+                       slab_validate(slab);
+               else if (shrink)
+                       slab_shrink(slab);
+               else if (set_debug)
+                       slab_debug(slab);
+               else if (show_ops)
+                       ops(slab);
+               else if (show_slab)
+                       slabcache(slab);
+               else if (show_report)
+                       report(slab);
+       }
+}
+
+struct option opts[] = {
+       { "aliases", 0, NULL, 'a' },
+       { "activity", 0, NULL, 'A' },
+       { "debug", 2, NULL, 'd' },
+       { "display-activity", 0, NULL, 'D' },
+       { "empty", 0, NULL, 'e' },
+       { "first-alias", 0, NULL, 'f' },
+       { "help", 0, NULL, 'h' },
+       { "inverted", 0, NULL, 'i'},
+       { "numa", 0, NULL, 'n' },
+       { "ops", 0, NULL, 'o' },
+       { "report", 0, NULL, 'r' },
+       { "shrink", 0, NULL, 's' },
+       { "slabs", 0, NULL, 'l' },
+       { "track", 0, NULL, 't'},
+       { "validate", 0, NULL, 'v' },
+       { "zero", 0, NULL, 'z' },
+       { "1ref", 0, NULL, '1'},
+       { NULL, 0, NULL, 0 }
+};
+
+int main(int argc, char *argv[])
+{
+       int c;
+       int err;
+       char *pattern_source;
+
+       page_size = getpagesize();
+
+       while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
+                                               opts, NULL)) != -1)
+               switch (c) {
+               case '1':
+                       show_single_ref = 1;
+                       break;
+               case 'a':
+                       show_alias = 1;
+                       break;
+               case 'A':
+                       sort_active = 1;
+                       break;
+               case 'd':
+                       set_debug = 1;
+                       if (!debug_opt_scan(optarg))
+                               fatal("Invalid debug option '%s'\n", optarg);
+                       break;
+               case 'D':
+                       show_activity = 1;
+                       break;
+               case 'e':
+                       show_empty = 1;
+                       break;
+               case 'f':
+                       show_first_alias = 1;
+                       break;
+               case 'h':
+                       usage();
+                       return 0;
+               case 'i':
+                       show_inverted = 1;
+                       break;
+               case 'n':
+                       show_numa = 1;
+                       break;
+               case 'o':
+                       show_ops = 1;
+                       break;
+               case 'r':
+                       show_report = 1;
+                       break;
+               case 's':
+                       shrink = 1;
+                       break;
+               case 'l':
+                       show_slab = 1;
+                       break;
+               case 't':
+                       show_track = 1;
+                       break;
+               case 'v':
+                       validate = 1;
+                       break;
+               case 'z':
+                       skip_zero = 0;
+                       break;
+               case 'T':
+                       show_totals = 1;
+                       break;
+               case 'S':
+                       sort_size = 1;
+                       break;
+
+               default:
+                       fatal("%s: Invalid option '%c'\n", argv[0], optopt);
+
+       }
+
+       if (!show_slab && !show_alias && !show_track && !show_report
+               && !validate && !shrink && !set_debug && !show_ops)
+                       show_slab = 1;
+
+       if (argc > optind)
+               pattern_source = argv[optind];
+       else
+               pattern_source = ".*";
+
+       err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
+       if (err)
+               fatal("%s: Invalid pattern '%s' code %d\n",
+                       argv[0], pattern_source, err);
+       read_slab_dir();
+       if (show_alias)
+               alias();
+       else
+       if (show_totals)
+               totals();
+       else {
+               link_slabs();
+               rename_slabs();
+               sort_slabs();
+               output_slabs();
+       }
+       return 0;
+}