Energy estimation tools for the Palm
Proceedings of the 3rd ACM international workshop on Modeling, analysis and simulation of wireless and mobile systems
ASPLOS IX Proceedings of the ninth international conference on Architectural support for programming languages and operating systems
Low Power Control Techniques For TFT LCD Displays
CASES '02 Proceedings of the 2002 international conference on Compilers, architecture, and synthesis for embedded systems
Energy-efficient soft real-time CPU scheduling for mobile multimedia systems
SOSP '03 Proceedings of the nineteenth ACM symposium on Operating systems principles
Cooperative I/O: a novel I/O semantics for energy-aware applications
OSDI '02 Proceedings of the 5th symposium on Operating systems design and implementationCopyright restrictions prevent ACM from being able to make the PDFs for this conference available for downloading
Towards universal mobile caching
Proceedings of the 4th ACM international workshop on Data engineering for wireless and mobile access
Power phase variation in a commercial server workload
Proceedings of the 2006 international symposium on Low power electronics and design
GreenFS: making enterprise computers greener by protecting them better
Proceedings of the 3rd ACM SIGOPS/EuroSys European Conference on Computer Systems 2008
Towards energy efficient VoIP over wireless LANs
Proceedings of the 9th ACM international symposium on Mobile ad hoc networking and computing
Koala: a platform for OS-level power management
Proceedings of the 4th ACM European conference on Computer systems
Proceedings of the 42nd Annual IEEE/ACM International Symposium on Microarchitecture
Want to save energy?: put intelligence into systems
CSECS'09 Proceedings of the 8th WSEAS International Conference on Circuits, systems, electronics, control & signal processing
The use of eye tracking for PC energy management
Proceedings of the 2010 Symposium on Eye-Tracking Research & Applications
On query processing considering energy consumption for broadcast database systems
DASFAA'07 Proceedings of the 12th international conference on Database systems for advanced applications
Accounting for the energy consumption of personal computing including portable devices
Proceedings of the 1st International Conference on Energy-Efficient Computing and Networking
Virtual machine power metering and provisioning
Proceedings of the 1st ACM symposium on Cloud computing
Display power management policies in practice
Proceedings of the 7th international conference on Autonomic computing
An analysis of power consumption in a smartphone
USENIXATC'10 Proceedings of the 2010 USENIX conference on USENIX annual technical conference
Power-aware I/O virtualization
WIOV'10 Proceedings of the 2nd conference on I/O virtualization
Design of a flexible and robust gateway to collect sensor data in intermittent power environments
International Journal of Sensor Networks
Modeling CPU energy consumption for energy efficient scheduling
Proceedings of the 1st Workshop on Green Computing
Fine-grained power modeling for smartphones using system call tracing
Proceedings of the sixth conference on Computer systems
EnerJ: approximate data types for safe and general low-power computation
Proceedings of the 32nd ACM SIGPLAN conference on Programming language design and implementation
Object-based local dimming for LCD systems with LED BLUs
Proceedings of the 17th IEEE/ACM international symposium on Low-power electronics and design
Impact of VoIP codecs on the energy consumption of portable devices
Proceedings of the 6th ACM workshop on Performance monitoring and measurement of heterogeneous wireless and wired networks
A hardware implementation of the user-centric display energy management
PATMOS'09 Proceedings of the 19th international conference on Integrated Circuit and System Design: power and Timing Modeling, Optimization and Simulation
Simulation-based evaluation of the Imagine stream processor with scientific programs
International Journal of High Performance Computing and Networking
Power consumption in enterprise-scale backup storage systems
FAST'12 Proceedings of the 10th USENIX conference on File and Storage Technologies
Energy-Efficient Sensing with the Low Power, Energy Aware Processing (LEAP) Architecture
ACM Transactions on Embedded Computing Systems (TECS)
Power- and time-aware buffer cache management for real-time embedded databases
Journal of Systems Architecture: the EUROMICRO Journal
Energy-based rate adaptation for 802.11n
Proceedings of the 18th annual international conference on Mobile computing and networking
Adaptive thermal management for portable system batteries by forced convection cooling
Proceedings of the Conference on Design, Automation and Test in Europe
Service-oriented heterogeneous resource sharing for optimizing service latency in mobile cloud
Proceedings of the first international workshop on Mobile cloud computing & networking
Effects of workload variation on the energy distribution in a mobile platform
Microprocessors & Microsystems
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The purpose of this work was to obtain a component-wise breakdown of the power consumption a modern laptop. We measured the power usage of the key components in an IBM ThinkPad R40 laptop using an Agilent Oscilloscope and current probes. We obtained the power consumption for the CPU, optical drive, hard disk, display, graphics card, memory, and wireless card subsystems–either through direct measurement or subtractive measurement and calculation. Moreover, we measured the power consumption of each component for a variety of workloads. We found that total system power consumption varies a lot (8 W to 30 W) depending on the workload, and moreover that the distribution of power consumption among the components varies even more widely. We also found that though power saving techniques such as DVS can reduce CPU power considerably, the total system power is still dominated by CPU power in the case of CPU intensive workloads. The display is the other main source of power consumption in a laptop; it dominates when the CPU is idle. We also found that reducing the backlight brightness can reduce the system power significantly, more than any other display power saving techniques. Finally, we observed OS differences in the power consumption.