A computer has cache and main memory. If a referenced word…
A computer has cache and main memory. If a referenced word is in the cache, 10ns are required to access it. If it is in main memory but not in the cache, 60ns are required to load it into the cache (this includes the time to originally check the cache), and then, the reference is started again. The main memory hit ratio is 0.5. What is the average time in ns required to access a referenced word on this system? You do not need to solve the equation necessarily, but instead lay out the solution.