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migration: fix counting xbzrle cache_miss_rate 

Sync up xbzrle_cache_miss_prev only after migration iteration goes
forward

Signed-off-by: Xiao Guangrong <xiaoguangrong@tencent.com>
Message-Id: <20180604095520.8563-4-xiaoguangrong@tencent.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Xiao Guangrong 2018-06-04 17:55:11 +08:00 committed by Dr. David Alan Gilbert
parent a36f6ff46f
commit e0e7a45d7f
1 changed files with 1 additions and 1 deletions
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2
migration/ram.c
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@ -1200,9 +1200,9 @@ 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 */