diff options
| -rw-r--r-- | libdiskfs/name-cache.c | 66 |
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; |