1 Why Does Ivy Use An Invalidation Scheme For Consistency Instead Of An Update Schem 2620544

1. Why does IVY use an invalidation scheme for consistency instead of an update scheme?

2. Some machines have a single instruction that, in one atomic action, exchanges a register with a word in memory. Using this instruction, it is possible to implement semaphores for protecting critical regions. Will pro-grams using this instruction work on a page-based DSM system? If so, under what circumstances will they work efficiently?

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