NDLI: Automatic runtime frequency-scaling system for energy savings in parallel applications

Content Provider	Springer Nature Link
Author	Sundriyal, Vaibhav Sosonkina, Masha Zhang, Zhao
Copyright Year	2013
Abstract	Although high-performance computing has always been about efficient application execution, both energy and power consumption have become critical concerns owing to their effect on operating costs and failure rates of large-scale computing platforms. Modern processors provide techniques, such as dynamic voltage and frequency scaling (DVFS) and CPU clock modulation (called throttling), to improve energy efficiency on-the-fly. Without careful application, however, DVFS and throttling may cause a significant performance loss due to system overhead. This paper proposes a novel runtime system that maximizes energy saving by selecting appropriate values for DVFS and throttling in parallel applications. Specifically, the system automatically predicts communication phases in parallel applications and applies frequency scaling considering both the CPU offload, provided by the network-interface card, and the architectural stalls during computation. Experiments, performed on NAS parallel benchmarks as well as on real-world applications in molecular dynamics and linear system solution, demonstrate that the proposed runtime system obtaining energy savings of as much as 14 % with a low performance loss of about 2 %.
Starting Page	777
Ending Page	797
Page Count	21
File Format	PDF
ISSN	09208542
Journal	The Journal of Supercomputing
Volume Number	68
Issue Number	2
e-ISSN	15730484
Language	English
Publisher	Springer US
Publisher Date	2013-12-13
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	MPI Dynamic voltage and frequency scaling Throttling Infiniband Parallel computing Programming Languages, Compilers, Interpreters Processor Architectures Computer Science
Content Type	Text
Resource Type	Article
Subject	Theoretical Computer Science Information Systems Hardware and Architecture Software

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