Page replication.
As we described in the chapter, one important, but difficult, goal of a NUMA multiprocessor designer is maximizing the number of page accesses that can be serviced by local memory.Describe the three strategies, COMA, page migration and page replication, and discuss the advantages and disadvantages of each. What will be an ideal response?
Page replication involves maintaining more than one copy of a particular page in different processors’ local memories.This significantly improves performance for pages frequently read by processes executing on different processors. However, this policy is ineffective, and even inefficient, for pages to which data is written frequently. Also, replication complicates memory-coherence protocols, and false sharing can occur with this strategy. Finally, there is overhead for maintaining page-access histories.
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What will be an ideal response?