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SLUB: slabinfo upgrade
-e Show empty slabs -d Modification of slab debug options at runtime -o Operations. Display of ctor / dtor etc. -r Report: Display all available information about a slabcache. Cleanup tracking display and make it work right. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Lameter
Linus Torvalds
parent
be7b3fbcef
commit
a87615b8f9
@ -16,6 +16,7 @@
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#include <stdarg.h>
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#include <getopt.h>
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#include <regex.h>
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#include <errno.h>
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#define MAX_SLABS 500
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#define MAX_ALIASES 500
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@ -41,12 +42,15 @@ struct aliasinfo {
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} aliasinfo[MAX_ALIASES];
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int slabs = 0;
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int actual_slabs = 0;
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int aliases = 0;
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int alias_targets = 0;
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int highest_node = 0;
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char buffer[4096];
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int show_empty = 0;
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int show_report = 0;
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int show_alias = 0;
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int show_slab = 0;
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int skip_zero = 1;
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@ -59,6 +63,15 @@ int show_inverted = 0;
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int show_single_ref = 0;
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int show_totals = 0;
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int sort_size = 0;
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int set_debug = 0;
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int show_ops = 0;
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/* Debug options */
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int sanity = 0;
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int redzone = 0;
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int poison = 0;
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int tracking = 0;
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int tracing = 0;
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int page_size;
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@ -76,20 +89,33 @@ void fatal(const char *x, ...)
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void usage(void)
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{
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printf("slabinfo [-ahnpvtsz] [slab-regexp]\n"
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printf("slabinfo 5/7/2007. (c) 2007 sgi. clameter@sgi.com\n\n"
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"slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
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"-a|--aliases Show aliases\n"
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"-d<options>|--debug=<options> Set/Clear Debug options\n"
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"-e|--empty Show empty slabs\n"
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"-f|--first-alias Show first alias\n"
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"-h|--help Show usage information\n"
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"-i|--inverted Inverted list\n"
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"-l|--slabs Show slabs\n"
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"-n|--numa Show NUMA information\n"
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"-o|--ops Show kmem_cache_ops\n"
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"-s|--shrink Shrink slabs\n"
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"-v|--validate Validate slabs\n"
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"-r|--report Detailed report on single slabs\n"
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"-S|--Size Sort by size\n"
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"-t|--tracking Show alloc/free information\n"
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"-T|--Totals Show summary information\n"
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"-l|--slabs Show slabs\n"
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"-S|--Size Sort by size\n"
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"-v|--validate Validate slabs\n"
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"-z|--zero Include empty slabs\n"
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"-f|--first-alias Show first alias\n"
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"-i|--inverted Inverted list\n"
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"-1|--1ref Single reference\n"
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"\nValid debug options (FZPUT may be combined)\n"
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"a / A Switch on all debug options (=FZUP)\n"
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"- Switch off all debug options\n"
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"f / F Sanity Checks (SLAB_DEBUG_FREE)\n"
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"z / Z Redzoning\n"
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"p / P Poisoning\n"
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"u / U Tracking\n"
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"t / T Tracing\n"
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);
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}
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@ -143,11 +169,10 @@ unsigned long get_obj_and_str(char *name, char **x)
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void set_obj(struct slabinfo *s, char *name, int n)
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{
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char x[100];
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FILE *f;
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sprintf(x, "%s/%s", s->name, name);
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FILE *f = fopen(x, "w");
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f = fopen(x, "w");
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if (!f)
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fatal("Cannot write to %s\n", x);
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@ -155,6 +180,26 @@ void set_obj(struct slabinfo *s, char *name, int n)
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fclose(f);
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}
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unsigned long read_slab_obj(struct slabinfo *s, char *name)
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{
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char x[100];
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FILE *f;
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int l;
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sprintf(x, "%s/%s", s->name, name);
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f = fopen(x, "r");
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if (!f) {
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buffer[0] = 0;
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l = 0;
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} else {
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l = fread(buffer, 1, sizeof(buffer), f);
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buffer[l] = 0;
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fclose(f);
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}
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return l;
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}
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/*
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* Put a size string together
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*/
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@ -226,7 +271,7 @@ int line = 0;
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void first_line(void)
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{
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printf("Name Objects Objsize Space "
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printf("Name Objects Objsize Space "
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"Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n");
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}
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@ -246,10 +291,7 @@ struct aliasinfo *find_one_alias(struct slabinfo *find)
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return best;
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}
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}
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if (best)
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return best;
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fatal("Cannot find alias for %s\n", find->name);
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return NULL;
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return best;
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}
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unsigned long slab_size(struct slabinfo *s)
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@ -257,6 +299,126 @@ unsigned long slab_size(struct slabinfo *s)
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return s->slabs * (page_size << s->order);
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}
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void slab_numa(struct slabinfo *s, int mode)
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{
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int node;
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if (strcmp(s->name, "*") == 0)
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return;
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if (!highest_node) {
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printf("\n%s: No NUMA information available.\n", s->name);
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return;
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}
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if (skip_zero && !s->slabs)
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return;
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if (!line) {
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printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
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for(node = 0; node <= highest_node; node++)
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printf(" %4d", node);
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printf("\n----------------------");
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for(node = 0; node <= highest_node; node++)
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printf("-----");
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printf("\n");
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}
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printf("%-21s ", mode ? "All slabs" : s->name);
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for(node = 0; node <= highest_node; node++) {
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char b[20];
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store_size(b, s->numa[node]);
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printf(" %4s", b);
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}
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printf("\n");
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if (mode) {
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printf("%-21s ", "Partial slabs");
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for(node = 0; node <= highest_node; node++) {
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char b[20];
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store_size(b, s->numa_partial[node]);
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printf(" %4s", b);
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}
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printf("\n");
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}
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line++;
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}
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void show_tracking(struct slabinfo *s)
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{
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printf("\n%s: Kernel object allocation\n", s->name);
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printf("-----------------------------------------------------------------------\n");
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if (read_slab_obj(s, "alloc_calls"))
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printf(buffer);
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else
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printf("No Data\n");
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printf("\n%s: Kernel object freeing\n", s->name);
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printf("------------------------------------------------------------------------\n");
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if (read_slab_obj(s, "free_calls"))
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printf(buffer);
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else
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printf("No Data\n");
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}
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void ops(struct slabinfo *s)
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{
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if (strcmp(s->name, "*") == 0)
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return;
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if (read_slab_obj(s, "ops")) {
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printf("\n%s: kmem_cache operations\n", s->name);
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printf("--------------------------------------------\n");
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printf(buffer);
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} else
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printf("\n%s has no kmem_cache operations\n", s->name);
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}
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const char *onoff(int x)
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{
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if (x)
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return "On ";
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return "Off";
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}
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void report(struct slabinfo *s)
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{
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if (strcmp(s->name, "*") == 0)
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return;
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printf("\nSlabcache: %-20s Aliases: %2d Order : %2d\n", s->name, s->aliases, s->order);
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if (s->hwcache_align)
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printf("** Hardware cacheline aligned\n");
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if (s->cache_dma)
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printf("** Memory is allocated in a special DMA zone\n");
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if (s->destroy_by_rcu)
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printf("** Slabs are destroyed via RCU\n");
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if (s->reclaim_account)
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printf("** Reclaim accounting active\n");
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printf("\nSizes (bytes) Slabs Debug Memory\n");
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printf("------------------------------------------------------------------------\n");
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printf("Object : %7d Total : %7ld Sanity Checks : %s Total: %7ld\n",
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s->object_size, s->slabs, onoff(s->sanity_checks),
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s->slabs * (page_size << s->order));
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printf("SlabObj: %7d Full : %7ld Redzoning : %s Used : %7ld\n",
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s->slab_size, s->slabs - s->partial - s->cpu_slabs,
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onoff(s->red_zone), s->objects * s->object_size);
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printf("SlabSiz: %7d Partial: %7ld Poisoning : %s Loss : %7ld\n",
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page_size << s->order, s->partial, onoff(s->poison),
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s->slabs * (page_size << s->order) - s->objects * s->object_size);
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printf("Loss : %7d CpuSlab: %7d Tracking : %s Lalig: %7ld\n",
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s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
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(s->slab_size - s->object_size) * s->objects);
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printf("Align : %7d Objects: %7d Tracing : %s Lpadd: %7ld\n",
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s->align, s->objs_per_slab, onoff(s->trace),
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((page_size << s->order) - s->objs_per_slab * s->slab_size) *
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s->slabs);
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ops(s);
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show_tracking(s);
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slab_numa(s, 1);
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}
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void slabcache(struct slabinfo *s)
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{
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@ -265,7 +427,18 @@ void slabcache(struct slabinfo *s)
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char flags[20];
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char *p = flags;
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if (skip_zero && !s->slabs)
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if (strcmp(s->name, "*") == 0)
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return;
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if (actual_slabs == 1) {
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report(s);
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return;
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}
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if (skip_zero && !show_empty && !s->slabs)
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return;
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if (show_empty && s->slabs)
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return;
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store_size(size_str, slab_size(s));
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@ -303,48 +476,128 @@ void slabcache(struct slabinfo *s)
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flags);
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}
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void slab_numa(struct slabinfo *s)
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/*
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* Analyze debug options. Return false if something is amiss.
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*/
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int debug_opt_scan(char *opt)
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{
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int node;
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if (!opt || !opt[0] || strcmp(opt, "-") == 0)
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return 1;
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if (!highest_node)
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fatal("No NUMA information available.\n");
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if (skip_zero && !s->slabs)
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return;
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if (!line) {
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printf("\nSlab Node ");
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for(node = 0; node <= highest_node; node++)
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printf(" %4d", node);
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printf("\n----------------------");
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for(node = 0; node <= highest_node; node++)
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printf("-----");
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printf("\n");
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if (strcasecmp(opt, "a") == 0) {
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sanity = 1;
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poison = 1;
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redzone = 1;
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tracking = 1;
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return 1;
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}
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printf("%-21s ", s->name);
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for(node = 0; node <= highest_node; node++) {
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char b[20];
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store_size(b, s->numa[node]);
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printf(" %4s", b);
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}
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printf("\n");
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line++;
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for ( ; *opt; opt++)
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switch (*opt) {
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case 'F' : case 'f':
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if (sanity)
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return 0;
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sanity = 1;
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break;
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case 'P' : case 'p':
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if (poison)
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return 0;
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poison = 1;
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break;
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case 'Z' : case 'z':
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if (redzone)
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return 0;
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redzone = 1;
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break;
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case 'U' : case 'u':
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if (tracking)
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return 0;
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tracking = 1;
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break;
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case 'T' : case 't':
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if (tracing)
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return 0;
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tracing = 1;
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break;
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default:
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return 0;
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}
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return 1;
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}
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void show_tracking(struct slabinfo *s)
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int slab_empty(struct slabinfo *s)
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{
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printf("\n%s: Calls to allocate a slab object\n", s->name);
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printf("---------------------------------------------------\n");
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if (read_obj("alloc_calls"))
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printf(buffer);
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if (s->objects > 0)
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return 0;
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printf("%s: Calls to free a slab object\n", s->name);
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printf("-----------------------------------------------\n");
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if (read_obj("free_calls"))
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printf(buffer);
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/*
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* We may still have slabs even if there are no objects. Shrinking will
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* remove them.
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*/
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if (s->slabs != 0)
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set_obj(s, "shrink", 1);
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return 1;
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}
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void slab_debug(struct slabinfo *s)
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{
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if (sanity && !s->sanity_checks) {
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set_obj(s, "sanity", 1);
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}
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if (!sanity && s->sanity_checks) {
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if (slab_empty(s))
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set_obj(s, "sanity", 0);
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else
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fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
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}
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if (redzone && !s->red_zone) {
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if (slab_empty(s))
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set_obj(s, "red_zone", 1);
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else
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fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
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}
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if (!redzone && s->red_zone) {
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if (slab_empty(s))
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set_obj(s, "red_zone", 0);
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else
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fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
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}
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if (poison && !s->poison) {
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if (slab_empty(s))
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set_obj(s, "poison", 1);
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else
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fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
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}
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if (!poison && s->poison) {
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if (slab_empty(s))
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set_obj(s, "poison", 0);
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else
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fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
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}
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if (tracking && !s->store_user) {
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if (slab_empty(s))
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set_obj(s, "store_user", 1);
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else
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fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
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}
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if (!tracking && s->store_user) {
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if (slab_empty(s))
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set_obj(s, "store_user", 0);
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else
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fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
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}
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if (tracing && !s->trace) {
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if (slabs == 1)
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set_obj(s, "trace", 1);
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else
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fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
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}
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if (!tracing && s->trace)
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set_obj(s, "trace", 1);
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}
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void totals(void)
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@ -673,7 +926,7 @@ void link_slabs(void)
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for (a = aliasinfo; a < aliasinfo + aliases; a++) {
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for(s = slabinfo; s < slabinfo + slabs; s++)
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for (s = slabinfo; s < slabinfo + slabs; s++)
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if (strcmp(a->ref, s->name) == 0) {
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a->slab = s;
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s->refs++;
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@ -704,7 +957,7 @@ void alias(void)
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continue;
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}
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}
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printf("\n%-20s <- %s", a->slab->name, a->name);
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printf("\n%-12s <- %s", a->slab->name, a->name);
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active = a->slab->name;
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}
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else
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@ -729,7 +982,12 @@ void rename_slabs(void)
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a = find_one_alias(s);
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s->name = a->name;
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if (a)
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s->name = a->name;
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else {
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s->name = "*";
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actual_slabs--;
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}
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}
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}
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@ -748,11 +1006,14 @@ void read_slab_dir(void)
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char *t;
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int count;
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|
||||
if (chdir("/sys/slab"))
|
||||
fatal("SYSFS support for SLUB not active\n");
|
||||
|
||||
dir = opendir(".");
|
||||
while ((de = readdir(dir))) {
|
||||
if (de->d_name[0] == '.' ||
|
||||
slab_mismatch(de->d_name))
|
||||
continue;
|
||||
(de->d_name[0] != ':' && slab_mismatch(de->d_name)))
|
||||
continue;
|
||||
switch (de->d_type) {
|
||||
case DT_LNK:
|
||||
alias->name = strdup(de->d_name);
|
||||
@ -807,6 +1068,7 @@ void read_slab_dir(void)
|
||||
}
|
||||
closedir(dir);
|
||||
slabs = slab - slabinfo;
|
||||
actual_slabs = slabs;
|
||||
aliases = alias - aliasinfo;
|
||||
if (slabs > MAX_SLABS)
|
||||
fatal("Too many slabs\n");
|
||||
@ -825,34 +1087,37 @@ void output_slabs(void)
|
||||
|
||||
|
||||
if (show_numa)
|
||||
slab_numa(slab);
|
||||
else
|
||||
if (show_track)
|
||||
slab_numa(slab, 0);
|
||||
else if (show_track)
|
||||
show_tracking(slab);
|
||||
else
|
||||
if (validate)
|
||||
else if (validate)
|
||||
slab_validate(slab);
|
||||
else
|
||||
if (shrink)
|
||||
else if (shrink)
|
||||
slab_shrink(slab);
|
||||
else {
|
||||
if (show_slab)
|
||||
slabcache(slab);
|
||||
}
|
||||
else if (set_debug)
|
||||
slab_debug(slab);
|
||||
else if (show_ops)
|
||||
ops(slab);
|
||||
else if (show_slab)
|
||||
slabcache(slab);
|
||||
}
|
||||
}
|
||||
|
||||
struct option opts[] = {
|
||||
{ "aliases", 0, NULL, 'a' },
|
||||
{ "slabs", 0, NULL, 'l' },
|
||||
{ "numa", 0, NULL, 'n' },
|
||||
{ "zero", 0, NULL, 'z' },
|
||||
{ "help", 0, NULL, 'h' },
|
||||
{ "validate", 0, NULL, 'v' },
|
||||
{ "debug", 2, NULL, 'd' },
|
||||
{ "empty", 0, NULL, 'e' },
|
||||
{ "first-alias", 0, NULL, 'f' },
|
||||
{ "shrink", 0, NULL, 's' },
|
||||
{ "track", 0, NULL, 't'},
|
||||
{ "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 }
|
||||
};
|
||||
@ -864,10 +1129,9 @@ int main(int argc, char *argv[])
|
||||
char *pattern_source;
|
||||
|
||||
page_size = getpagesize();
|
||||
if (chdir("/sys/slab"))
|
||||
fatal("This kernel does not have SLUB support.\n");
|
||||
|
||||
while ((c = getopt_long(argc, argv, "afhil1npstvzTS", opts, NULL)) != -1)
|
||||
while ((c = getopt_long(argc, argv, "ad::efhil1noprstvzTS",
|
||||
opts, NULL)) != -1)
|
||||
switch(c) {
|
||||
case '1':
|
||||
show_single_ref = 1;
|
||||
@ -875,6 +1139,14 @@ int main(int argc, char *argv[])
|
||||
case 'a':
|
||||
show_alias = 1;
|
||||
break;
|
||||
case 'd':
|
||||
set_debug = 1;
|
||||
if (!debug_opt_scan(optarg))
|
||||
fatal("Invalid debug option '%s'\n", optarg);
|
||||
break;
|
||||
case 'e':
|
||||
show_empty = 1;
|
||||
break;
|
||||
case 'f':
|
||||
show_first_alias = 1;
|
||||
break;
|
||||
@ -887,6 +1159,12 @@ int main(int argc, char *argv[])
|
||||
case 'n':
|
||||
show_numa = 1;
|
||||
break;
|
||||
case 'o':
|
||||
show_ops = 1;
|
||||
break;
|
||||
case 'r':
|
||||
show_report = 1;
|
||||
break;
|
||||
case 's':
|
||||
shrink = 1;
|
||||
break;
|
||||
@ -914,8 +1192,8 @@ int main(int argc, char *argv[])
|
||||
|
||||
}
|
||||
|
||||
if (!show_slab && !show_alias && !show_track
|
||||
&& !validate && !shrink)
|
||||
if (!show_slab && !show_alias && !show_track && !show_report
|
||||
&& !validate && !shrink && !set_debug && !show_ops)
|
||||
show_slab = 1;
|
||||
|
||||
if (argc > optind)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user