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-rw-r--r--libdiskfs/name-cache.c66
1 files changed, 1 insertions, 65 deletions
diff --git a/libdiskfs/name-cache.c b/libdiskfs/name-cache.c
index a212a6dc..25b5d0d9 100644
--- a/libdiskfs/name-cache.c
+++ b/libdiskfs/name-cache.c
@@ -45,29 +45,12 @@ struct lookup_cache
/* Strlen of NAME. If this is zero, it's an unused entry. */
size_t name_len;
-
- /* XXX */
- int stati;
};
/* The contents of the cache in no particular order */
static struct cacheq lookup_cache = { sizeof (struct lookup_cache) };
static pthread_spinlock_t cache_lock = PTHREAD_SPINLOCK_INITIALIZER;
-
-/* Buffer to hold statistics */
-static struct stats
-{
- long pos_hits;
- long neg_hits;
- long miss;
- long fetch_errors;
-} statistics;
-
-#define PARTIAL_THRESH 100
-#define NPARTIALS MAXCACHE / PARTIAL_THRESH
-struct stats partial_stats [NPARTIALS];
-
/* If there's an entry for NAME, of length NAME_LEN, in directory DIR in the
cache, return its entry, otherwise 0. CACHE_LOCK must be held. */
@@ -85,10 +68,7 @@ find_cache (struct node *dir, const char *name, size_t name_len)
if (c->name_len == name_len
&& c->dir_cache_id == dir->cache_id
&& c->name[0] == name[0] && strcmp (c->name, name) == 0)
- {
- c->stati = i / 100;
- return c;
- }
+ return c;
return 0;
}
@@ -152,46 +132,6 @@ diskfs_purge_lookup_cache (struct node *dp, struct node *np)
pthread_spin_unlock (&cache_lock);
}
-/* Register a negative hit for an entry in the Nth stat class */
-void
-register_neg_hit (int n)
-{
- int i;
-
- statistics.neg_hits++;
-
- for (i = 0; i < n; i++)
- partial_stats[i].miss++;
- for (; i < NPARTIALS; i++)
- partial_stats[i].neg_hits++;
-}
-
-/* Register a positive hit for an entry in the Nth stat class */
-void
-register_pos_hit (int n)
-{
- int i;
-
- statistics.pos_hits++;
-
- for (i = 0; i < n; i++)
- partial_stats[i].miss++;
- for (; i < NPARTIALS; i++)
- partial_stats[i].pos_hits++;
-}
-
-/* Register a miss */
-void
-register_miss ()
-{
- int i;
-
- statistics.miss++;
- for (i = 0; i < NPARTIALS; i++)
- partial_stats[i].miss++;
-}
-
-
/* Scan the cache looking for NAME inside DIR. If we don't know
anything entry at all, then return 0. If the entry is confirmed to
@@ -214,14 +154,12 @@ diskfs_check_lookup_cache (struct node *dir, const char *name)
if (id == 0)
/* A negative cache entry. */
{
- register_neg_hit (c->stati);
pthread_spin_unlock (&cache_lock);
return (struct node *)-1;
}
else if (id == dir->cache_id)
/* The cached node is the same as DIR. */
{
- register_pos_hit (c->stati);
pthread_spin_unlock (&cache_lock);
diskfs_nref (dir);
return dir;
@@ -232,7 +170,6 @@ diskfs_check_lookup_cache (struct node *dir, const char *name)
struct node *np;
error_t err;
- register_pos_hit (c->stati);
pthread_spin_unlock (&cache_lock);
if (name[0] == '.' && name[1] == '.' && name[2] == '\0')
@@ -259,7 +196,6 @@ diskfs_check_lookup_cache (struct node *dir, const char *name)
}
}
- register_miss ();
pthread_spin_unlock (&cache_lock);
return 0;