Imagine that your company is trying to decide between a single-processor system and a dual-processor system. Figure 1.26 gives the performance on two sets of benchmarks-a memory benchmark and a processor benchmark. You know that your application will spend 40% of its time on memory-centric computations, and 60% of its time on processor-centric computations.
a. Calculate the weighted execution time of the benchmarks.
b. How much speedup do you anticipate getting if you move from using a Pentium 4 570 to an Athlon 64 X2 4800+ on a CPU-intensive application suite?
c. At what ratio of memory to processor computation would the performance of the Pentium 4 570 be equal to the Pentium D 820?