Raven: An Energy-Efficient Multicore ProcessorBen KellerBEARS 2014Advisors: Bora Nikolic and Krste Asanovic

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Motivation: Energy Is King

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Performance = Power * Energy Efficiency(Tasks / Second) (Joules/Second) (Tasks/Joule)

• Power is fixed• For better performance,

need better energy efficiency

• Total energy is fixed• For “more” performance,

need better energy efficiency

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Fine-Grained Voltage Scaling

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Raven3 System Diagram

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