-D lists caches that support defragmentation -C lists caches that use a ctor. Change field names for defrag_ratio and remote_node_defrag_ratio. Add determination of the allocation ratio for a slab. The allocation ratio is the percentage of available slots for objects in use. Reviewed-by: Rik van Riel Signed-off-by: Christoph Lameter --- Documentation/vm/slabinfo.c | 52 +++++++++++++++++++++++++++++++++++++------- 1 file changed, 44 insertions(+), 8 deletions(-) Index: linux-2.6.23-mm1/Documentation/vm/slabinfo.c =================================================================== --- linux-2.6.23-mm1.orig/Documentation/vm/slabinfo.c 2007-10-12 16:25:54.000000000 -0700 +++ linux-2.6.23-mm1/Documentation/vm/slabinfo.c 2007-10-12 17:58:14.000000000 -0700 @@ -31,6 +31,8 @@ struct slabinfo { int hwcache_align, object_size, objs_per_slab; int sanity_checks, slab_size, store_user, trace; int order, poison, reclaim_account, red_zone; + int defrag, ctor; + int defrag_ratio, remote_node_defrag_ratio; unsigned long partial, objects, slabs; int numa[MAX_NODES]; int numa_partial[MAX_NODES]; @@ -57,6 +59,8 @@ int show_slab = 0; int skip_zero = 1; int show_numa = 0; int show_track = 0; +int show_defrag = 0; +int show_ctor = 0; int show_first_alias = 0; int validate = 0; int shrink = 0; @@ -91,18 +95,20 @@ void fatal(const char *x, ...) void usage(void) { printf("slabinfo 5/7/2007. (c) 2007 sgi. clameter@sgi.com\n\n" - "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n" + "slabinfo [-aCDefhilnosSrtTvz1] [-d debugopts] [slab-regexp]\n" "-a|--aliases Show aliases\n" + "-C|--ctor Show slabs with ctors\n" "-d|--debug= Set/Clear Debug options\n" - "-e|--empty Show empty slabs\n" + "-D|--defrag Show defragmentable caches\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" + "-o|--ops Show kmem_cache_ops\n" "-s|--shrink Shrink slabs\n" - "-r|--report Detailed report on single 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" @@ -282,7 +288,7 @@ int line = 0; void first_line(void) { printf("Name Objects Objsize Space " - "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n"); + "Slabs/Part/Cpu O/S O %%Ra %%Ef Flg\n"); } /* @@ -325,7 +331,7 @@ void slab_numa(struct slabinfo *s, int m return; if (!line) { - printf("\n%-21s:", mode ? "NUMA nodes" : "Slab"); + printf("\n%-21s: Rto ", mode ? "NUMA nodes" : "Slab"); for(node = 0; node <= highest_node; node++) printf(" %4d", node); printf("\n----------------------"); @@ -334,6 +340,7 @@ void slab_numa(struct slabinfo *s, int m printf("\n"); } printf("%-21s ", mode ? "All slabs" : s->name); + printf("%3d ", s->remote_node_defrag_ratio); for(node = 0; node <= highest_node; node++) { char b[20]; @@ -407,6 +414,8 @@ void report(struct slabinfo *s) printf("** Slabs are destroyed via RCU\n"); if (s->reclaim_account) printf("** Reclaim accounting active\n"); + if (s->defrag) + printf("** Defragmentation at %d%%\n", s->defrag_ratio); printf("\nSizes (bytes) Slabs Debug Memory\n"); printf("------------------------------------------------------------------------\n"); @@ -453,6 +462,12 @@ void slabcache(struct slabinfo *s) if (show_empty && s->slabs) return; + if (show_defrag && !s->defrag) + return; + + if (show_ctor && !s->ctor) + return; + store_size(size_str, slab_size(s)); snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs, s->partial, s->cpu_slabs); @@ -463,6 +478,10 @@ void slabcache(struct slabinfo *s) *p++ = '*'; if (s->cache_dma) *p++ = 'd'; + if (s->defrag) + *p++ = 'D'; + if (s->ctor) + *p++ = 'C'; if (s->hwcache_align) *p++ = 'A'; if (s->poison) @@ -482,7 +501,7 @@ void slabcache(struct slabinfo *s) 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 * 100) / (s->slabs * s->objs_per_slab) : 100, s->slabs ? (s->objects * s->object_size * 100) / (s->slabs * (page_size << s->order)) : 100, flags); @@ -1074,7 +1093,16 @@ void read_slab_dir(void) free(t); slab->store_user = get_obj("store_user"); slab->trace = get_obj("trace"); + slab->defrag_ratio = get_obj("defrag_ratio"); + slab->remote_node_defrag_ratio = + get_obj("remote_node_defrag_ratio"); chdir(".."); + if (read_slab_obj(slab, "ops")) { + if (strstr(buffer, "ctor :")) + slab->ctor = 1; + if (strstr(buffer, "kick :")) + slab->defrag = 1; + } if (slab->name[0] == ':') alias_targets++; slab++; @@ -1124,7 +1152,9 @@ void output_slabs(void) struct option opts[] = { { "aliases", 0, NULL, 'a' }, + { "ctor", 0, NULL, 'C' }, { "debug", 2, NULL, 'd' }, + { "defrag", 0, NULL, 'D' }, { "empty", 0, NULL, 'e' }, { "first-alias", 0, NULL, 'f' }, { "help", 0, NULL, 'h' }, @@ -1149,7 +1179,7 @@ int main(int argc, char *argv[]) page_size = getpagesize(); - while ((c = getopt_long(argc, argv, "ad::efhil1noprstvzTS", + while ((c = getopt_long(argc, argv, "ad::efhil1noprstvzCDTS", opts, NULL)) != -1) switch (c) { case '1': @@ -1199,6 +1229,12 @@ int main(int argc, char *argv[]) case 'z': skip_zero = 0; break; + case 'C': + show_ctor = 1; + break; + case 'D': + show_defrag = 1; + break; case 'T': show_totals = 1; break; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/