[PATCH 7/8] slub: Extend slabinfo to support -D and -F options
From: Pekka J Enberg
Date: Sat Jul 19 2008 - 08:33:02 EST
From: Christoph Lameter <clameter@xxxxxxx>
-F 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 <riel@xxxxxxxxxx>
Signed-off-by: Christoph Lameter <clameter@xxxxxxx>
Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
---
Documentation/vm/slabinfo.c | 48 ++++++++++++++++++++++++++++++++++++++----
1 files changed, 43 insertions(+), 5 deletions(-)
diff --git a/Documentation/vm/slabinfo.c b/Documentation/vm/slabinfo.c
index df32276..05c6c44 100644
--- a/Documentation/vm/slabinfo.c
+++ b/Documentation/vm/slabinfo.c
@@ -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, objects_partial, objects_total;
unsigned long alloc_fastpath, alloc_slowpath;
unsigned long free_fastpath, free_slowpath;
@@ -64,6 +66,8 @@ 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;
@@ -100,13 +104,15 @@ void fatal(const char *x, ...)
void usage(void)
{
printf("slabinfo 5/7/2007. (c) 2007 sgi.\n\n"
- "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
+ "slabinfo [-aCdDefFhnpvtsz] [-d debugopts] [slab-regexp]\n"
"-a|--aliases Show aliases\n"
"-A|--activity Most active slabs first\n"
+ "-C|--ctor Show slabs with ctors\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"
+ "-F|--defrag Show defragmentable caches\n"
"-h|--help Show usage information\n"
"-i|--inverted Inverted list\n"
"-l|--slabs Show slabs\n"
@@ -296,7 +302,7 @@ void first_line(void)
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");
+ "Slabs/Part/Cpu O/S O %%Ra %%Ef Flg\n");
}
/*
@@ -345,7 +351,7 @@ void slab_numa(struct slabinfo *s, int mode)
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----------------------");
@@ -354,6 +360,7 @@ void slab_numa(struct slabinfo *s, int mode)
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];
@@ -492,6 +499,8 @@ 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");
@@ -539,6 +548,12 @@ 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->cpu_slabs,
s->partial, s->cpu_slabs);
@@ -550,6 +565,10 @@ void slabcache(struct slabinfo *s)
*p++ = '*';
if (s->cache_dma)
*p++ = 'd';
+ if (s->defrag)
+ *p++ = 'F';
+ if (s->ctor)
+ *p++ = 'C';
if (s->hwcache_align)
*p++ = 'A';
if (s->poison)
@@ -584,7 +603,8 @@ 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->partial * 100) /
+ (s->slabs * s->objs_per_slab) : 100,
s->slabs ? (s->objects * s->object_size * 100) /
(s->slabs * (page_size << s->order)) : 100,
flags);
@@ -1190,7 +1210,17 @@ void read_slab_dir(void)
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->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++;
@@ -1241,10 +1271,12 @@ void output_slabs(void)
struct option opts[] = {
{ "aliases", 0, NULL, 'a' },
{ "activity", 0, NULL, 'A' },
+ { "ctor", 0, NULL, 'C' },
{ "debug", 2, NULL, 'd' },
{ "display-activity", 0, NULL, 'D' },
{ "empty", 0, NULL, 'e' },
{ "first-alias", 0, NULL, 'f' },
+ { "defrag", 0, NULL, 'F' },
{ "help", 0, NULL, 'h' },
{ "inverted", 0, NULL, 'i'},
{ "numa", 0, NULL, 'n' },
@@ -1267,7 +1299,7 @@ int main(int argc, char *argv[])
page_size = getpagesize();
- while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
+ while ((c = getopt_long(argc, argv, "aACd::DefFhil1noprstvzTS",
opts, NULL)) != -1)
switch (c) {
case '1':
@@ -1323,6 +1355,12 @@ int main(int argc, char *argv[])
case 'z':
skip_zero = 0;
break;
+ case 'C':
+ show_ctor = 1;
+ break;
+ case 'F':
+ show_defrag = 1;
+ break;
case 'T':
show_totals = 1;
break;
--
1.5.4.3
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/