From 0d24db337e6d81c0c620ab65cc6947bd6553f742 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Thu, 21 Oct 2010 13:01:56 -0500 Subject: slub: move slabinfo.c to tools/slub/slabinfo.c We now have a tools directory for these things. Reviewed-by: KOSAKI Motohiro Acked-by: David Rientjes Signed-off-by: Christoph Lameter Signed-off-by: Pekka Enberg --- Documentation/vm/slabinfo.c | 1364 ------------------------------------------- tools/slub/slabinfo.c | 1364 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 1364 insertions(+), 1364 deletions(-) delete mode 100644 Documentation/vm/slabinfo.c create mode 100644 tools/slub/slabinfo.c diff --git a/Documentation/vm/slabinfo.c b/Documentation/vm/slabinfo.c deleted file mode 100644 index 92e729f4b676..000000000000 --- a/Documentation/vm/slabinfo.c +++ /dev/null @@ -1,1364 +0,0 @@ -/* - * Slabinfo: Tool to get reports about slabs - * - * (C) 2007 sgi, Christoph Lameter - * - * Compile by: - * - * gcc -o slabinfo slabinfo.c - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#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; - 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 5/7/2007. (c) 2007 sgi.\n\n" - "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n" - "-a|--aliases Show aliases\n" - "-A|--activity Most active slabs first\n" - "-d|--debug= 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\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(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(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(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("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); - - if (s->alloc_refill) - printf("Refill %8lu\n", s->alloc_refill); - - total = s->deactivate_full + s->deactivate_empty + - s->deactivate_to_head + s->deactivate_to_tail; - - if (total) - printf("Deactivate Full=%lu(%lu%%) Empty=%lu(%lu%%) " - "ToHead=%lu(%lu%%) ToTail=%lu(%lu%%)\n", - s->deactivate_full, (s->deactivate_full * 100) / total, - s->deactivate_empty, (s->deactivate_empty * 100) / total, - s->deactivate_to_head, (s->deactivate_to_head * 100) / total, - s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total); -} - -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\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); - } - 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)); - - 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"); - 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; -} diff --git a/tools/slub/slabinfo.c b/tools/slub/slabinfo.c new file mode 100644 index 000000000000..516551c9f172 --- /dev/null +++ b/tools/slub/slabinfo.c @@ -0,0 +1,1364 @@ +/* + * Slabinfo: Tool to get reports about slabs + * + * (C) 2007 sgi, Christoph Lameter + * + * Compile by: + * + * gcc -o slabinfo slabinfo.c + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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; + 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 5/7/2007. (c) 2007 sgi.\n\n" + "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n" + "-a|--aliases Show aliases\n" + "-A|--activity Most active slabs first\n" + "-d|--debug= 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\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(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(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(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("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); + + if (s->alloc_refill) + printf("Refill %8lu\n", s->alloc_refill); + + total = s->deactivate_full + s->deactivate_empty + + s->deactivate_to_head + s->deactivate_to_tail; + + if (total) + printf("Deactivate Full=%lu(%lu%%) Empty=%lu(%lu%%) " + "ToHead=%lu(%lu%%) ToTail=%lu(%lu%%)\n", + s->deactivate_full, (s->deactivate_full * 100) / total, + s->deactivate_empty, (s->deactivate_empty * 100) / total, + s->deactivate_to_head, (s->deactivate_to_head * 100) / total, + s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total); +} + +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\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); + } + 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)); + + 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"); + 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; +} -- cgit v1.2.3 From 4a92379bdfb48680a5e6775dd53a586df7b6b0b1 Mon Sep 17 00:00:00 2001 From: Richard Kennedy Date: Thu, 21 Oct 2010 10:29:19 +0100 Subject: slub tracing: move trace calls out of always inlined functions to reduce kernel code size Having the trace calls defined in the always inlined kmalloc functions in include/linux/slub_def.h causes a lot of code duplication as the trace functions get instantiated for each kamalloc call site. This can simply be removed by pushing the trace calls down into the functions in slub.c. On my x86_64 built this patch shrinks the code size of the kernel by approx 36K and also shrinks the code size of many modules -- too many to list here ;) size vmlinux (2.6.36) reports text data bss dec hex filename 5410611 743172 828928 6982711 6a8c37 vmlinux 5373738 744244 828928 6946910 6a005e vmlinux + patch The resulting kernel has had some testing & kmalloc trace still seems to work. This patch - moves trace_kmalloc out of the inlined kmalloc() and pushes it down into kmem_cache_alloc_trace() so this it only get instantiated once. - rename kmem_cache_alloc_notrace() to kmem_cache_alloc_trace() to indicate that now is does have tracing. (maybe this would better being called something like kmalloc_kmem_cache ?) - adds a new function kmalloc_order() to handle allocation and tracing of large allocations of page order. - removes tracing from the inlined kmalloc_large() replacing them with a call to kmalloc_order(); - move tracing out of inlined kmalloc_node() and pushing it down into kmem_cache_alloc_node_trace - rename kmem_cache_alloc_node_notrace() to kmem_cache_alloc_node_trace() - removes the include of trace/events/kmem.h from slub_def.h. v2 - keep kmalloc_order_trace inline when !CONFIG_TRACE Signed-off-by: Richard Kennedy Signed-off-by: Pekka Enberg --- include/linux/slub_def.h | 55 +++++++++++++++++++++++------------------------- mm/slub.c | 30 ++++++++++++++++++++------ 2 files changed, 49 insertions(+), 36 deletions(-) diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h index e4f5ed180b9b..8b6e8ae5d5ca 100644 --- a/include/linux/slub_def.h +++ b/include/linux/slub_def.h @@ -10,9 +10,8 @@ #include #include #include -#include -#include +#include enum stat_item { ALLOC_FASTPATH, /* Allocation from cpu slab */ @@ -216,31 +215,40 @@ static __always_inline struct kmem_cache *kmalloc_slab(size_t size) void *kmem_cache_alloc(struct kmem_cache *, gfp_t); void *__kmalloc(size_t size, gfp_t flags); +static __always_inline void * +kmalloc_order(size_t size, gfp_t flags, unsigned int order) +{ + void *ret = (void *) __get_free_pages(flags | __GFP_COMP, order); + kmemleak_alloc(ret, size, 1, flags); + return ret; +} + #ifdef CONFIG_TRACING -extern void *kmem_cache_alloc_notrace(struct kmem_cache *s, gfp_t gfpflags); +extern void * +kmem_cache_alloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size); +extern void *kmalloc_order_trace(size_t size, gfp_t flags, unsigned int order); #else static __always_inline void * -kmem_cache_alloc_notrace(struct kmem_cache *s, gfp_t gfpflags) +kmem_cache_alloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size) { return kmem_cache_alloc(s, gfpflags); } + +static __always_inline void * +kmalloc_order_trace(size_t size, gfp_t flags, unsigned int order) +{ + return kmalloc_order(size, flags, order); +} #endif static __always_inline void *kmalloc_large(size_t size, gfp_t flags) { unsigned int order = get_order(size); - void *ret = (void *) __get_free_pages(flags | __GFP_COMP, order); - - kmemleak_alloc(ret, size, 1, flags); - trace_kmalloc(_THIS_IP_, ret, size, PAGE_SIZE << order, flags); - - return ret; + return kmalloc_order_trace(size, flags, order); } static __always_inline void *kmalloc(size_t size, gfp_t flags) { - void *ret; - if (__builtin_constant_p(size)) { if (size > SLUB_MAX_SIZE) return kmalloc_large(size, flags); @@ -251,11 +259,7 @@ static __always_inline void *kmalloc(size_t size, gfp_t flags) if (!s) return ZERO_SIZE_PTR; - ret = kmem_cache_alloc_notrace(s, flags); - - trace_kmalloc(_THIS_IP_, ret, size, s->size, flags); - - return ret; + return kmem_cache_alloc_trace(s, flags, size); } } return __kmalloc(size, flags); @@ -266,14 +270,14 @@ void *__kmalloc_node(size_t size, gfp_t flags, int node); void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node); #ifdef CONFIG_TRACING -extern void *kmem_cache_alloc_node_notrace(struct kmem_cache *s, +extern void *kmem_cache_alloc_node_trace(struct kmem_cache *s, gfp_t gfpflags, - int node); + int node, size_t size); #else static __always_inline void * -kmem_cache_alloc_node_notrace(struct kmem_cache *s, +kmem_cache_alloc_node_trace(struct kmem_cache *s, gfp_t gfpflags, - int node) + int node, size_t size) { return kmem_cache_alloc_node(s, gfpflags, node); } @@ -281,8 +285,6 @@ kmem_cache_alloc_node_notrace(struct kmem_cache *s, static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node) { - void *ret; - if (__builtin_constant_p(size) && size <= SLUB_MAX_SIZE && !(flags & SLUB_DMA)) { struct kmem_cache *s = kmalloc_slab(size); @@ -290,12 +292,7 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node) if (!s) return ZERO_SIZE_PTR; - ret = kmem_cache_alloc_node_notrace(s, flags, node); - - trace_kmalloc_node(_THIS_IP_, ret, - size, s->size, flags, node); - - return ret; + return kmem_cache_alloc_node_trace(s, flags, node, size); } return __kmalloc_node(size, flags, node); } diff --git a/mm/slub.c b/mm/slub.c index 8fd5401bb071..7e657aa19475 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -28,6 +28,8 @@ #include #include +#include + /* * Lock order: * 1. slab_lock(page) @@ -1774,11 +1776,21 @@ void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags) EXPORT_SYMBOL(kmem_cache_alloc); #ifdef CONFIG_TRACING -void *kmem_cache_alloc_notrace(struct kmem_cache *s, gfp_t gfpflags) +void *kmem_cache_alloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size) +{ + void *ret = slab_alloc(s, gfpflags, NUMA_NO_NODE, _RET_IP_); + trace_kmalloc(_RET_IP_, ret, size, s->size, gfpflags); + return ret; +} +EXPORT_SYMBOL(kmem_cache_alloc_trace); + +void *kmalloc_order_trace(size_t size, gfp_t flags, unsigned int order) { - return slab_alloc(s, gfpflags, NUMA_NO_NODE, _RET_IP_); + void *ret = kmalloc_order(size, flags, order); + trace_kmalloc(_RET_IP_, ret, size, PAGE_SIZE << order, flags); + return ret; } -EXPORT_SYMBOL(kmem_cache_alloc_notrace); +EXPORT_SYMBOL(kmalloc_order_trace); #endif #ifdef CONFIG_NUMA @@ -1794,13 +1806,17 @@ void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node) EXPORT_SYMBOL(kmem_cache_alloc_node); #ifdef CONFIG_TRACING -void *kmem_cache_alloc_node_notrace(struct kmem_cache *s, +void *kmem_cache_alloc_node_trace(struct kmem_cache *s, gfp_t gfpflags, - int node) + int node, size_t size) { - return slab_alloc(s, gfpflags, node, _RET_IP_); + void *ret = slab_alloc(s, gfpflags, node, _RET_IP_); + + trace_kmalloc_node(_RET_IP_, ret, + size, s->size, gfpflags, node); + return ret; } -EXPORT_SYMBOL(kmem_cache_alloc_node_notrace); +EXPORT_SYMBOL(kmem_cache_alloc_node_trace); #endif #endif -- cgit v1.2.3 From 716ce5d4a6f81653507c21b152eb7629d150ce7a Mon Sep 17 00:00:00 2001 From: Pekka Enberg Date: Wed, 27 Oct 2010 18:17:38 +0300 Subject: slub: Fix build breakage in Documentation/vm This patch fixes a build breakage introduced by commit f5ac4916e9840292edd33c7a52b10364526547f3 ("slub: move slabinfo.c to tools/slub/slabinfo.c") that was repoted by Stephen: After merging the slab tree, today's linux-next build (x86_64 allmodconfig) failed like this: gcc: /scratch/sfr/next/Documentation/vm/slabinfo.c: No such file or directory gcc: no input files Caused by commit f5ac4916e9840292edd33c7a52b10364526547f3 ("slub: move slabinfo.c to tools/slub/slabinfo.c"). Missing update to Documentation/vm/Makefile? Reported-by: Stephen Rothwell Signed-off-by: Pekka Enberg --- Documentation/vm/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/vm/Makefile b/Documentation/vm/Makefile index 9dcff328b964..3fa4d0668864 100644 --- a/Documentation/vm/Makefile +++ b/Documentation/vm/Makefile @@ -2,7 +2,7 @@ obj- := dummy.o # List of programs to build -hostprogs-y := slabinfo page-types hugepage-mmap hugepage-shm map_hugetlb +hostprogs-y := page-types hugepage-mmap hugepage-shm map_hugetlb # Tell kbuild to always build the programs always := $(hostprogs-y) -- cgit v1.2.3 From 98072e4d977aabe6a39abb95951cd8bf2c2202d5 Mon Sep 17 00:00:00 2001 From: Pavel Emelyanov Date: Thu, 28 Oct 2010 13:50:37 +0400 Subject: slub: Fix slub_lock down/up imbalance There are two places, that do not release the slub_lock. Respective bugs were introduced by sysfs changes ab4d5ed5 (slub: Enable sysfs support for !CONFIG_SLUB_DEBUG) and 2bce6485 ( slub: Allow removal of slab caches during boot). Acked-by: Christoph Lameter Signed-off-by: Pavel Emelyanov Signed-off-by: Pekka Enberg --- mm/slub.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/slub.c b/mm/slub.c index 7e657aa19475..7796a0446b3f 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3289,9 +3289,9 @@ struct kmem_cache *kmem_cache_create(const char *name, size_t size, kfree(n); kfree(s); } +err: up_write(&slub_lock); -err: if (flags & SLAB_PANIC) panic("Cannot create slabcache %s\n", name); else @@ -3878,6 +3878,7 @@ static ssize_t show_slab_objects(struct kmem_cache *s, x += sprintf(buf + x, " N%d=%lu", node, nodes[node]); #endif + up_read(&slub_lock); kfree(nodes); return x + sprintf(buf + x, "\n"); } -- cgit v1.2.3 From 85beb5869a4f6abb52a7cf8e01de6fa57e9ee47d Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 24 Nov 2010 16:23:34 -0500 Subject: tracing/slab: Move kmalloc tracepoint out of inline code The tracepoint for kmalloc is in the slab inlined code which causes every instance of kmalloc to have the tracepoint. This patch moves the tracepoint out of the inline code to the slab C file, which removes a large number of inlined trace points. objdump -dr vmlinux.slab| grep 'jmpq.* Signed-off-by: Pekka Enberg --- include/linux/slab_def.h | 33 +++++++++++++-------------------- mm/slab.c | 38 +++++++++++++++++++++++--------------- 2 files changed, 36 insertions(+), 35 deletions(-) diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h index 791a502f6906..83203ae9390b 100644 --- a/include/linux/slab_def.h +++ b/include/linux/slab_def.h @@ -138,11 +138,12 @@ void *kmem_cache_alloc(struct kmem_cache *, gfp_t); void *__kmalloc(size_t size, gfp_t flags); #ifdef CONFIG_TRACING -extern void *kmem_cache_alloc_notrace(struct kmem_cache *cachep, gfp_t flags); +extern void *kmem_cache_alloc_trace(size_t size, + struct kmem_cache *cachep, gfp_t flags); extern size_t slab_buffer_size(struct kmem_cache *cachep); #else static __always_inline void * -kmem_cache_alloc_notrace(struct kmem_cache *cachep, gfp_t flags) +kmem_cache_alloc_trace(size_t size, struct kmem_cache *cachep, gfp_t flags) { return kmem_cache_alloc(cachep, flags); } @@ -179,10 +180,7 @@ found: #endif cachep = malloc_sizes[i].cs_cachep; - ret = kmem_cache_alloc_notrace(cachep, flags); - - trace_kmalloc(_THIS_IP_, ret, - size, slab_buffer_size(cachep), flags); + ret = kmem_cache_alloc_trace(size, cachep, flags); return ret; } @@ -194,14 +192,16 @@ extern void *__kmalloc_node(size_t size, gfp_t flags, int node); extern void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node); #ifdef CONFIG_TRACING -extern void *kmem_cache_alloc_node_notrace(struct kmem_cache *cachep, - gfp_t flags, - int nodeid); +extern void *kmem_cache_alloc_node_trace(size_t size, + struct kmem_cache *cachep, + gfp_t flags, + int nodeid); #else static __always_inline void * -kmem_cache_alloc_node_notrace(struct kmem_cache *cachep, - gfp_t flags, - int nodeid) +kmem_cache_alloc_node_trace(size_t size, + struct kmem_cache *cachep, + gfp_t flags, + int nodeid) { return kmem_cache_alloc_node(cachep, flags, nodeid); } @@ -210,7 +210,6 @@ kmem_cache_alloc_node_notrace(struct kmem_cache *cachep, static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node) { struct kmem_cache *cachep; - void *ret; if (__builtin_constant_p(size)) { int i = 0; @@ -234,13 +233,7 @@ found: #endif cachep = malloc_sizes[i].cs_cachep; - ret = kmem_cache_alloc_node_notrace(cachep, flags, node); - - trace_kmalloc_node(_THIS_IP_, ret, - size, slab_buffer_size(cachep), - flags, node); - - return ret; + return kmem_cache_alloc_node_trace(size, cachep, flags, node); } return __kmalloc_node(size, flags, node); } diff --git a/mm/slab.c b/mm/slab.c index b1e40dafbab3..dfcc8885d7d5 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -3653,11 +3653,18 @@ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags) EXPORT_SYMBOL(kmem_cache_alloc); #ifdef CONFIG_TRACING -void *kmem_cache_alloc_notrace(struct kmem_cache *cachep, gfp_t flags) +void * +kmem_cache_alloc_trace(size_t size, struct kmem_cache *cachep, gfp_t flags) { - return __cache_alloc(cachep, flags, __builtin_return_address(0)); + void *ret; + + ret = __cache_alloc(cachep, flags, __builtin_return_address(0)); + + trace_kmalloc(_RET_IP_, ret, + size, slab_buffer_size(cachep), flags); + return ret; } -EXPORT_SYMBOL(kmem_cache_alloc_notrace); +EXPORT_SYMBOL(kmem_cache_alloc_trace); #endif /** @@ -3705,31 +3712,32 @@ void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid) EXPORT_SYMBOL(kmem_cache_alloc_node); #ifdef CONFIG_TRACING -void *kmem_cache_alloc_node_notrace(struct kmem_cache *cachep, - gfp_t flags, - int nodeid) +void *kmem_cache_alloc_node_trace(size_t size, + struct kmem_cache *cachep, + gfp_t flags, + int nodeid) { - return __cache_alloc_node(cachep, flags, nodeid, + void *ret; + + ret = __cache_alloc_node(cachep, flags, nodeid, __builtin_return_address(0)); + trace_kmalloc_node(_RET_IP_, ret, + size, slab_buffer_size(cachep), + flags, nodeid); + return ret; } -EXPORT_SYMBOL(kmem_cache_alloc_node_notrace); +EXPORT_SYMBOL(kmem_cache_alloc_node_trace); #endif static __always_inline void * __do_kmalloc_node(size_t size, gfp_t flags, int node, void *caller) { struct kmem_cache *cachep; - void *ret; cachep = kmem_find_general_cachep(size, flags); if (unlikely(ZERO_OR_NULL_PTR(cachep))) return cachep; - ret = kmem_cache_alloc_node_notrace(cachep, flags, node); - - trace_kmalloc_node((unsigned long) caller, ret, - size, cachep->buffer_size, flags, node); - - return ret; + return kmem_cache_alloc_node_trace(size, cachep, flags, node); } #if defined(CONFIG_DEBUG_SLAB) || defined(CONFIG_TRACING) -- cgit v1.2.3 From 8165984acf825917437debae519209073c32a5a7 Mon Sep 17 00:00:00 2001 From: Tero Roponen Date: Wed, 1 Dec 2010 20:04:20 +0200 Subject: slub: Fix a crash during slabinfo -v Commit f7cb1933621bce66a77f690776a16fe3ebbc4d58 ("SLUB: Pass active and inactive redzone flags instead of boolean to debug functions") missed two instances of check_object(). This caused a lot of warnings during 'slabinfo -v' finally leading to a crash: BUG ext4_xattr: Freepointer corrupt ... BUG buffer_head: Freepointer corrupt ... BUG ext4_alloc_context: Freepointer corrupt ... ... BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 IP: [] file_sb_list_del+0x1c/0x35 PGD 79d78067 PUD 79e67067 PMD 0 Oops: 0002 [#1] SMP last sysfs file: /sys/kernel/slab/:t-0000192/validate This patch fixes the problem by converting the two missed instances. Acked-by: Christoph Lameter Signed-off-by: Tero Roponen Signed-off-by: Pekka Enberg --- mm/slub.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index 7796a0446b3f..48d82a55f4b6 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3417,13 +3417,13 @@ static int validate_slab(struct kmem_cache *s, struct page *page, for_each_free_object(p, s, page->freelist) { set_bit(slab_index(p, s, addr), map); - if (!check_object(s, page, p, 0)) + if (!check_object(s, page, p, SLUB_RED_INACTIVE)) return 0; } for_each_object(p, s, addr, page->objects) if (!test_bit(slab_index(p, s, addr), map)) - if (!check_object(s, page, p, 1)) + if (!check_object(s, page, p, SLUB_RED_ACTIVE)) return 0; return 1; } -- cgit v1.2.3