Assume a program requires the execution of 75 ×106 FP instructions, 112 ×106 INT instructions, 88 ×106 L/S instructions, and 12 × 106 branch instructions. The CPI for each type of instruction is 1, 3, 4, and 2, respectively. Assume that the processor has a 2 GHz clock rate. a) By how much must we improve the CPI of FP instructions if we want the program to run two times faster? b) By how much must we improve the CPI of L/S instructions if we want the program to run two times faster? c) By how much is the execution time of the program improved if the CPI of INT and FP instructions is reduced by 40% and the CPI of L/S and Branch is reduced by 30%
Assume a program requires the execution of 75 ×106 FP instructions, 112 ×106 INT instructions, 88 ×106 L/S instructions, and 12 × 106 branch instructions. The CPI for each type of instruction is 1, 3, 4, and 2, respectively. Assume that the processor has a 2 GHz clock rate. a) By how much must we improve the CPI of FP instructions if we want the program to run two times faster? b) By how much must we improve the CPI of L/S instructions if we want the program to run two times faster? c) By how much is the execution time of the program improved if the CPI of INT and FP instructions is reduced by 40% and the CPI of L/S and Branch is reduced by 30%
Chapter4: Processor Technology And Architecture
Section: Chapter Questions
Problem 2PE: If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the...
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Assume a
INT instructions, 88 ×106 L/S instructions, and 12 × 106 branch instructions.
The CPI for each type of instruction is 1, 3, 4, and 2, respectively. Assume that
the processor has a 2 GHz clock rate.
a) By how much must we improve the CPI of FP instructions if we want
the program to run two times faster?
b) By how much must we improve the CPI of L/S instructions if we want
the program to run two times faster?
c) By how much is the execution time of the program improved if the
CPI of INT and FP instructions is reduced by 40% and the CPI of L/S
and Branch is reduced by 30%?
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