ECE 337 Fall 2008
HW 5
Due Nov, 03, 2008 (Monday)
Problems on Textbook:
Exercises 10, 16, 20, 21, 23, 24, 26 in Chapter 4
Problem 8
What is the expected access time for the following architecture?
–L1 Cache: access time, 1 cycle; total hit ratio, 85%
–L2 Cache: access time, 10 cycles; total hit ratio, 95%
–L2 Cache: access time, 10 cycles; total hit ratio, 99%
–Memory: access time, 100 cycles.
Additional L1 or L2 cache could be added at the same cost. If additional L1 cache results
in a 90% hit rate and additional L2 cache results in 98% hit rate, which one would be the
better addition here?