aboutsummaryrefslogtreecommitdiffstats
path: root/tools/vm
diff options
context:
space:
mode:
authorDave Young <dyoung@redhat.com>2012-03-28 21:42:55 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-29 00:14:37 (GMT)
commit63e315535abe0d820d0e3db4c06bc5de74aeefc8 (patch)
treea0d745a07fccf8723af85220a8779ecbfb43581a /tools/vm
parentc6dd897f3bfc54a44942d742d6dfa842e33d88e0 (diff)
mm: move slabinfo.c to tools/vm
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>
Diffstat (limited to 'tools/vm')
-rw-r--r--tools/vm/Makefile4
-rw-r--r--tools/vm/slabinfo.c1393
2 files changed, 1395 insertions, 2 deletions
diff --git a/tools/vm/Makefile b/tools/vm/Makefile
index 3823d4b..8e30e5c 100644
--- a/tools/vm/Makefile
+++ b/tools/vm/Makefile
@@ -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
index 0000000..164cbcf
--- /dev/null
+++ b/tools/vm/slabinfo.c
@@ -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;
+}

Privacy Policy