[PATCH 03/12] migration: fix counting xbzrle cache_miss_rate

[guangrong.xiao@xxxxxxxxx]

From: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxx>

Sync up xbzrle_cache_miss_prev only after migration iteration goes
forward

Signed-off-by: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxx>
---
 migration/ram.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/migration/ram.c b/migration/ram.c
index dbf24d8c87..dd1283dd45 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -1189,9 +1189,9 @@ static void migration_bitmap_sync(RAMState *rs)
                    (double)(xbzrle_counters.cache_miss -
                             rs->xbzrle_cache_miss_prev) /
                    (rs->iterations - rs->iterations_prev);
+                rs->xbzrle_cache_miss_prev = xbzrle_counters.cache_miss;
             }
             rs->iterations_prev = rs->iterations;
-            rs->xbzrle_cache_miss_prev = xbzrle_counters.cache_miss;
         }
 
         /* reset period counters */
-- 
2.14.4