slub: Update statistics handling for variable order slabs
Change the statistics to consider that slabs of the same slabcache
can have different number of objects in them since they may be of
different order.
Provide a new sysfs field
total_objects
which shows the total objects that the allocated slabs of a slabcache
could hold.
Add a max field that holds the largest slab order that was ever used
for a slab cache.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
diff --git a/Documentation/vm/slabinfo.c b/Documentation/vm/slabinfo.c
index 22d7e3e..d3ce295 100644
--- a/Documentation/vm/slabinfo.c
+++ b/Documentation/vm/slabinfo.c
@@ -31,7 +31,7 @@
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;
+ 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;
@@ -540,7 +540,8 @@
return;
store_size(size_str, slab_size(s));
- snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs, s->partial, s->cpu_slabs);
+ snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
+ s->partial, s->cpu_slabs);
if (!line++)
first_line();
@@ -776,7 +777,6 @@
unsigned long used;
unsigned long long wasted;
unsigned long long objwaste;
- long long objects_in_partial_slabs;
unsigned long percentage_partial_slabs;
unsigned long percentage_partial_objs;
@@ -790,18 +790,11 @@
wasted = size - used;
objwaste = s->slab_size - s->object_size;
- objects_in_partial_slabs = s->objects -
- (s->slabs - s->partial - s ->cpu_slabs) *
- s->objs_per_slab;
-
- if (objects_in_partial_slabs < 0)
- objects_in_partial_slabs = 0;
-
percentage_partial_slabs = s->partial * 100 / s->slabs;
if (percentage_partial_slabs > 100)
percentage_partial_slabs = 100;
- percentage_partial_objs = objects_in_partial_slabs * 100
+ percentage_partial_objs = s->objects_partial * 100
/ s->objects;
if (percentage_partial_objs > 100)
@@ -823,8 +816,8 @@
min_objects = s->objects;
if (used < min_used)
min_used = used;
- if (objects_in_partial_slabs < min_partobj)
- min_partobj = objects_in_partial_slabs;
+ 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)
@@ -848,8 +841,8 @@
max_objects = s->objects;
if (used > max_used)
max_used = used;
- if (objects_in_partial_slabs > max_partobj)
- max_partobj = objects_in_partial_slabs;
+ 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)
@@ -864,7 +857,7 @@
total_objects += s->objects;
total_used += used;
- total_partobj += objects_in_partial_slabs;
+ total_partobj += s->objects_partial;
total_ppart += percentage_partial_slabs;
total_ppartobj += percentage_partial_objs;
@@ -1160,6 +1153,8 @@
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");