Computer Architecture and Organization. Computer Evolution and Performance. ENIAC - background. Electronic Numerical Integrator And Computer John Presper Eckert and John Mauchly University of Pennsylvania Trajectory tables for weapons Started 1943 Finished 1946 Too late for war effort
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Computer Evolution and Performance
A program runs on computer A in 10 seconds. A has a 4 GHz clock rate. Design a computer B that runs the same program in 6 seconds. Constraint is that a faster design is possible but will require 1.2 times as many clock cycles as A. What is B’s clock rate?
Given are two computers with different instruction sets: B’s clock rate is 3 times that of A’s; a program on B requires twice as many instructions as one on A to do the same task. However, B’s CPI rate is 2, whereas A’s CPI rate is 3. Which machine does a job faster and by how much?
Machine A has twice the MIPS rate of machine B but requires 50% more instructions. Which is faster on a given task?
Machine A’s clock rate is 500 MHz, Machine B is 250 MHz. CPI for A is 2, CPI for B is 1.2. Which is faster on a common program (meaning the same instruction set)?