This paper derives simple, yet fundamental formulas to describe the interplay between parallelism of an application, program performance, and energy consumption and derives optimal frequencies allocated to the serial and parallel regions in an application to either minimize the total energy consumption or minimize the energy-delay product.
Abstract:
This paper derives simple, yet fundamental formulas to describe the interplay between parallelism of an application, program performance, and energy consumption. Given the ratio of serial and parallel portions in an application and the number of processors, we derive optimal frequencies allocated to the serial and parallel regions in an application to either minimize the total energy consumption or minimize the energy-delay product. The impact of static power is revealed by considering the ratio between static and dynamic power and quantifying the advantages of adding to the architecture capability to turn off individual processors and save static energy. We further determine the conditions under which one can obtain both energy and speed improvement, as well as the amount of improvement. While the formulas we obtain use simplifying assumptions, they provide valuable theoretical insights into energy-aware processor resource management. Our results form a basis for several interesting research directions in the area of energy-aware multicore processor architectures.
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Q1. What are the contributions mentioned in the paper "On the interplay of parallelization, program performance, and energy consumption" ?
This paper derives simple, yet fundamental formulas to describe the interplay between parallelism of an application, program performance, and energy consumption. The authors further determine the conditions under which one can obtain both energy and speed improvement, as well as the amount of improvement. While the formulas the authors obtain use simplifying assumptions, they provide valuable theoretical insights into energy-aware processor resource management.
Q2. What have the authors stated for future works in "On the interplay of parallelization, program performance, and energy consumption" ?
In this paper, the authors developed an analytical framework to study the trade-offs between parallelization, program performance, and energy consumption. The authors considered two machine models ; one assumes that individual processors can not be turned off independently, and the other assumes that they can. When processors can be individually turned off, the analysis indicates that the minimum total energy is independent of the number of processors used for executing the parallel section, while the energy-delay product is minimized when the maximum number of available processors are used during the parallel execution section. The demonstrated substantial power advantage that can be gained from turning off individual processors is a great incentive to designing multicore processors with the capability of turning off individual processors.