[Solved] You want to optimize a GPU program that renders 3D models... If the total rendering time is 40 seconds on one core, what is the expected rendering time using all 4 cores assuming perfect parallelism? | Intro to Computing

Intro to Computing - How Hardware Works

You want to optimize a GPU program that renders 3D models by splitting the workload evenly across 4 shader cores. If the total rendering time is 40 seconds on one core, what is the expected rendering time using all 4 cores assuming perfect parallelism?

A10 seconds

B40 seconds

C160 seconds

D4 seconds

Step-by-Step Solution

Solution:

Step 1: Understand parallel workload division
Splitting workload evenly across 4 cores means each core does 1/4 of the work.
Step 2: Calculate expected time with perfect parallelism
Total time divided by 4 cores: 40 seconds / 4 = 10 seconds.
Final Answer:
10 seconds -> Option A
Quick Check:
Parallel time = total time / number of cores [OK]

Quick Trick: Divide total time by cores for perfect parallel speedup [OK]

Common Mistakes:

Multiplying instead of dividing time
Ignoring parallelism benefits
Assuming time stays the same

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More Intro to Computing Quizzes

If the total rendering time is 40 seconds on one core, what is the expected rendering time using all 4 cores assuming perfect parallelism?

Step 1: Understand parallel workload division

Step 2: Calculate expected time with perfect parallelism

Final Answer:

Quick Check:

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