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Which loop transformation reduces the energy consumption of the memory systems?

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Which loop transformation reduces the energy consumption of the memory systems?

(a) loop permutation

(b) loop tiling

(c) loop fission

(d) loop fusion

The question was asked during an interview.

Origin of the question is High Level Optimization topic in division Implementing Embedded System: Hardware/Software Codesign of Embedded Systems

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Best answer
Correct option is (b) loop tiling

Easy explanation: The loop tiling can reduce the energy the consumption of the memory systems.

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