NDLI: Transition aware scheduling: increasing continuous idle-periods in resource units

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Transition aware scheduling: increasing continuous idle-periods in resource units

Content Provider	ACM Digital Library
Author	Vardhan, K. Ananda Srikant, Y. N.
Abstract	Static power consumption has become a significant factor of the total power consumption in a system. Circuit level switching techniques reduce static power consumption by exploiting idle periods in processor components and placing them into low power modes or turning them off completely. In this paper, we propose a modified automaton-based list scheduling technique that augments the circuit level techniques by reducing the number of transitions between power modes, thereby increasing the of idle periods in resource units. Our scheduler uses a global resource usage vector and the usage vector of the last issued instruction(s) to select instruction(s) from the ready list such that resource units common to the last issued instruction and the selected instruction(s) are continuously active without creating a transition into low power mode. We estimate the power consumed in resource units using an energy model parameterized by the number of idle cycles, active cycles and transitions. We have implemented our algorithm in gcc and our simulations for different classes of benchmarks using an ARM simulator, with single and multi issue, indicate an average energy savings of 4%-15% in resource units.
Starting Page	189
Ending Page	198
Page Count	10
File Format	PDF
ISBN	1595930191
DOI	10.1145/1062261.1062294
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2005-05-04
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Functional units Transitions Instruction scheduling Leakage energy consumption Idle periods
Content Type	Text
Resource Type	Article

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