ITPEC FE Morning April 2019 Question 9
Source exam: ITPEC FE Morning April 2019Topic: Computer Systems & Hardware
ITPEC FE Morning April 2019 — Question 9 of 80
MIPS to Execution Time — convert processor speed in MIPS to time per instruction.
50 MIPS = 50 × 10⁶ instructions/second.
- •Time per instruction =
1 / (50 × 10⁶)=20 × 10⁻⁹s = 20 ns
Quick rule: 1 MIPS = 1 μs per instruction, so for N MIPS → 1/N μs.
Why not others:
- (b) 50 ns — would correspond to 20 MIPS
- (c) 2 μs — off by factor of 100
- (d) 5 μs — off by factor of 250
Key formula: time_per_instruction = 1 / (MIPS × 10⁶) seconds.
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