Consider the following two processors. P1 has a clock rate of 4 GHz, average CPI of 0.9, and requires the execution of 5.0E9 instructions. P2 has a clock rate of 3 GHz, an average CPI of 0.75, and requires the execution of 1.0E9 instructions. Part A: One usual fallacy is to consider the computer with the largest clock rate as having the highest performance. Check if this is true for P1 and P2. Part B: Another fallacy is to consider that the processor executing the largest number of instructions will need a larger CPU time. Considering that processor P1 is executing a sequence of 1.0E9 instructions and that the CPI of processors P1 and P2 do not change, determine the number of instructions that P2 can execute in the same time that P1 needs to execute 1.0E9 instructions.

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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Consider the following two processors. P1 has a clock rate of 4 GHz, average CPI of
0.9, and requires the execution of 5.0E9 instructions. P2 has a clock rate of 3 GHz, an
average CPI of 0.75, and requires the execution of 1.0E9 instructions.
Part A: One usual fallacy is to consider the computer with the largest
clock rate as having the highest performance. Check if this is true
for P1 and P2.
Part B: Another fallacy is to consider that the processor executing the largest
number of instructions will need a larger CPU time. Considering that
processor P1 is executing a sequence of 1.0E9 instructions and that the CPI
of processors P1 and P2 do not change, determine the number of
instructions that P2 can execute in the same time that P1 needs to execute
1.0E9 instructions.
Transcribed Image Text:Consider the following two processors. P1 has a clock rate of 4 GHz, average CPI of 0.9, and requires the execution of 5.0E9 instructions. P2 has a clock rate of 3 GHz, an average CPI of 0.75, and requires the execution of 1.0E9 instructions. Part A: One usual fallacy is to consider the computer with the largest clock rate as having the highest performance. Check if this is true for P1 and P2. Part B: Another fallacy is to consider that the processor executing the largest number of instructions will need a larger CPU time. Considering that processor P1 is executing a sequence of 1.0E9 instructions and that the CPI of processors P1 and P2 do not change, determine the number of instructions that P2 can execute in the same time that P1 needs to execute 1.0E9 instructions.
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