According to the present invention, methods and apparatus are provided for increasing the efficiency of data access in a multiple processor, multiple cluster system. Mechanisms for improving the accuracy of information available to a cache coherence controller are provided in order to allow the cache coherence controller to reduce the number of transactions in a multiple cluster system. Cache state information is provided to a home cluster cache coherence controller to allow silent evictions of shared memory lines and change to dirty associated intervening requests to be efficiently handled.