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Skilled in the Art of Being Idle: Reducing Energy Waste in Networked Systems

Skilled in the Art of Being Idle: Reducing Energy Waste in Networked Systems. Sergiu Nedevschi , Jaideep Chandrashekar , Junda Liu, Bruce Nordman , Sylvia Ratnasamy , Nina Taft Presented by Pat McClory. Introduction.

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Skilled in the Art of Being Idle: Reducing Energy Waste in Networked Systems

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  1. Skilled in the Art of Being Idle:Reducing Energy Waste in Networked Systems SergiuNedevschi, JaideepChandrashekar, Junda Liu, Bruce Nordman, Sylvia Ratnasamy, Nina Taft Presented by Pat McClory

  2. Introduction • It’s estimated in the U.S. energy consumption of networked systems approaches 150 TWh, costing around 15 billion dollars. • About 75% of this consumption can be attributed to homes and enterprises.

  3. Introduction • Problem: Because sleep states cause a machine to effectively lose it’s network presence, many users decline to utilize them. • Goal: To develop a strategy where machines can take advantage of sleep states during idle periods without the penalty of losing network presence.

  4. Possible Approaches • “magic packets” – wake-on-arrival of packet • Use a proxy that handles idle-time traffic on behalf of sleeping host(s).

  5. Potential Energy Savings • Assuming an 80W power consumption for an idle PC, and assuming these machines are idle for 50% of the time, this amounts to roughly 60 TWh/year of wasted electricity.

  6. Wake-on-arrival • Machine is woken up for every packet it receives.

  7. Wake-on-arrival • Although in both the work and home scenario there is a relatively large amount of background chatter when idle, but if traffic exhibits burstiness there still could be potential for savings.

  8. Inter-packet Gaps

  9. Actual Savings

  10. Potential Proxy Savings by Traffic Type

  11. Energy Savings of Different Proxying Approaches

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