processor	clock frequency, MHz	performance, MIPS	CPU time, secs
VAX 11/780	5	1	12x
IBM RS/6000	25	18	x

The final column shows that the VAX required 12 times longer than the IBM measured in CPU time. 1. What is the relative size of the instruction count of the machine code for this benchmark program running on the two machines?

The instruction count is I_c and MIPS is in millions, therefore:

I_c = T * [(MIPS rate)/10⁶]

2. What are the CPI values for the two machines?

CPI is cycles per instruction or MHz/MIPS

problem 2.9 (3 pts)