Question 3 plz

What is the key advantage and disadvantage of each of shared memory and message passing with respect to the other? Write a shared memory version and a message passing version of a program to find the sum of the elements of a large array of integers (large as in tens of billions). Follow the lecture example of Ocean What does cache coherence achieve? Why is that important for the shared memory abstraction'? Why does our MSI protocol write back the block to memory on a BusRdX to an M block even though memory will continue to be stale due to the new writer? 1. 2. 3. 4