For a write-back, write-allocate cache, assuming 30% of replaced data cache blocks are dirty, what are the

Question:

For a write-back, write-allocate cache, assuming 30% of replaced data cache blocks are dirty, what are the minimal read and write bandwidths needed for a CPI of 2?

Consider the following program and cache behaviors. a. b. Data Reads per 1000 Instructions 250 200 Data Writes per 1000 Instructions 100 100 Instruction Cache