The Multistage Interconnection Network with Cache control mechanism (MINC) is a hardware mechanism to control the cache coherent in a switch-connected multiprocessors using a crossbar or Multistage Interconnection Network(MIN). In the MINC, the directory is located on the shared memory module and the Reduced Hierarchical Bit-map Directory schemes(RHBDs) are used to reduce the directory. In order to reduce unnecessary packets caused by compacting the bit map in the RHBD, a small cache called the pruning cache is introduced in the switching element.
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