performance/stat-prefetch: Add accounting of cache hits and misses.

Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 284 (performance actually decreases for 'ls -l' on a directory containing large number of files with stat-prefetch loaded)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=284

1 files changed, 2 insertions, 0 deletions

diff --git a/xlators/performance/stat-prefetch/src/stat-prefetch.h b/xlators/performance/stat-prefetch/src/stat-prefetch.h
index c17f96f24..2c5878ff5 100644
--- a/xlators/performance/stat-prefetch/src/stat-prefetch.h
+++ b/xlators/performance/stat-prefetch/src/stat-prefetch.h
@@ -37,6 +37,8 @@ struct sp_cache {
                                          * happen.
                                          */
         gf_lock_t   lock;
+        unsigned long miss;
+        unsigned long hits;
 };
 typedef struct sp_cache sp_cache_t;