(Solution) - For each part of this exercise assume the initial cache -(2025 Original AI-Free Solution)

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For each part of this exercise, assume the initial cache and memory state as illustrated in Figure 4.37. Each part of this exercise specifies a sequence of one or more CPU operations of the form:
P#:

[ <-- ]
Where P# designates the CPU (e.g., P0), is the CPU operation (e.g., read or write),

denotes the memory address, and indicates the new word to be assigned on a write operation.
Treat each action below as independently applied to the initial state as given in Figure 4.37. What is the resulting state (i.e., coherence state, tags, and data) of the caches and memory after the given action? Show only the blocks that change, for example, P0.B0: (I, 120, 00 01) indicates that CPU P0's block B0 has the final state of I, tag of 120, and data words 00 and 01. Also, what value is returned by each read operation?
a. P0: read 120
b. P0: write 120 <-- 80

For each part of this exercise, assume the initial cache

Figure 4.37 Bus-based snooping multiprocessor.
c. P15: write 120 <-- 80
d. P1: read 110
e. P0: write 108 <-- 48
f. P0: write 130 <-- 78
g. P15: write 130 <-- 78