From acb60628f53ba1fc29d1a554683acdb03f961c6f Mon Sep 17 00:00:00 2001
From: Ondrej Zajicek <santiago@crfreenet.org>
Date: Wed, 2 Jun 2010 22:20:40 +0200
Subject: Implements command that shows memory usage.

---
 lib/slab.c | 38 ++++++++++++++++++++++++++++++++++++--
 1 file changed, 36 insertions(+), 2 deletions(-)

(limited to 'lib/slab.c')

diff --git a/lib/slab.c b/lib/slab.c
index 8cce52f..af6b50b 100644
--- a/lib/slab.c
+++ b/lib/slab.c
@@ -41,6 +41,7 @@
 static void slab_free(resource *r);
 static void slab_dump(resource *r);
 static resource *slab_lookup(resource *r, unsigned long addr);
+static size_t slab_memsize(resource *r);
 
 #ifdef FAKE_SLAB
 
@@ -58,7 +59,8 @@ static struct resclass sl_class = {
   "FakeSlab",
   sizeof(struct slab),
   slab_free,
-  slab_dump
+  slab_dump,
+  slab_memsize
 };
 
 struct sl_obj {
@@ -116,6 +118,20 @@ slab_dump(resource *r)
   debug("(%d objects per %d bytes)\n", cnt, s->size);
 }
 
+static size_t
+slab_memsize(resource *r)
+{
+  slab *s = (slab *) r;
+  int cnt = 0;
+  struct sl_obj *o;
+
+  WALK_LIST(o, s->objs)
+    cnt++;
+
+  return ALLOC_OVERHEAD + sizeof(struct slab) + cnt * (ALLOC_OVERHEAD + s->size);
+}
+
+
 #else
 
 /*
@@ -136,7 +152,8 @@ static struct resclass sl_class = {
   sizeof(struct slab),
   slab_free,
   slab_dump,
-  slab_lookup
+  slab_lookup,
+  slab_memsize
 };
 
 struct sl_head {
@@ -324,6 +341,23 @@ slab_dump(resource *r)
   debug("(%de+%dp+%df blocks per %d objs per %d bytes)\n", ec, pc, fc, s->objs_per_slab, s->obj_size);
 }
 
+static size_t
+slab_memsize(resource *r)
+{
+  slab *s = (slab *) r;
+  int heads = 0;
+  struct sl_head *h;
+
+  WALK_LIST(h, s->empty_heads)
+    heads++;
+  WALK_LIST(h, s->partial_heads)
+    heads++;
+  WALK_LIST(h, s->full_heads)
+    heads++;
+
+  return ALLOC_OVERHEAD + sizeof(struct slab) + heads * (ALLOC_OVERHEAD + SLAB_SIZE);
+}
+
 static resource *
 slab_lookup(resource *r, unsigned long a)
 {
-- 
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