This presentation is about a lecture I gave within the "Green Lab" course of the Computer Science master, Software Engineering and Green IT track of the Vrije Universiteit Amsterdam: http://masters.vu.nl/en/programmes/computer-science-software-engineering-green-it/index.aspx http://www.procaccianti.me

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Total energy per view:
0.2 kWh
Total number of views:
2,307,082,001
Total energy consumed: 450 GWh in less than 3 years
x 45,000

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● Energy loss:
○ leakage
○ heat

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● Battery charge efficiency: 90%

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Energy loss:
● low utilization
● idle
● no energy
management
● Typical utilization rate: 30%

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Energy loss:
● Cooling
● Lighting
PUE = "Good" PUE = 1.4 = 40% loss

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"The energy efficiency of
hardware doubles every 1.5
years."
(Koomey's law)

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"Software gets slower more rapidly than hardware gets faster."
(Wirth's law)

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Nathan P. Myhrvold, Microsoft, ACM 1997

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● Our research initiative on
Software Energy Efficiency
○ Laboratory
○ Master course
○ Collaboration platform

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Code: 418158
Period: 1 (September-October)
ECTS: 6.0
Language: English

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g.procaccianti@vu.nl
i.malavolta@vu.nl