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Vinay Hanumaiah Digant Desai Sarma Vrudhula

Optimal Closed Loop Controller and Task Profiler for Dynamic Energy Management in Heterogeneous CMPs. NSF I/URC Center for Embedded Systems. Vinay Hanumaiah Digant Desai Sarma Vrudhula. Vinay Hanumaiah (Ph.D.) School of Electrical, Computer and Energy Engineering Arizona State University

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Vinay Hanumaiah Digant Desai Sarma Vrudhula

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  1. Optimal Closed Loop Controller and Task Profiler for Dynamic Energy Management in Heterogeneous CMPs NSF I/URC Center for Embedded Systems Vinay HanumaiahDigant DesaiSarmaVrudhula

  2. Vinay Hanumaiah (Ph.D.) School of Electrical, Computer and Energy Engineering Arizona State University vinayh@asu.edu Digant Desai (M.S.) School of Electrical, Computer and Energy Engineering Arizona State University digantdesai@asu.edu Sarma Vrudhula (Faculty) School of Computing, Informatics and Decision Systems Engineering Arizona State University vrudhula@asu.edu

  3. Ensure robust and stable processor operation

  4. Features of STEAM controller • Identification of thermal and power models • Models account for leakage AND workload characteristics • Controls knobs: • Per-core DVFS (P-state) and T-state • Flexible user specified objectives • MAX Perf/Watt AND MAX Perfwith thermal constraints • RLSand Kalman filtering to minimize prediction error

  5. Approach STEAMPlatform Details: Hardware: Intel Sandy Bridge OS: Ubuntu on Linux 3.5.5 Linux Prototype

  6. Power Model Identification Methodology Out-of-order CMP Design of experiments

  7. Model Parameters

  8. Thermal model identification methodology

  9. Task Profiler

  10. Power model validation

  11. > 30% improvement in energy efficiency

  12. Improvement in energy efficiency

  13. Use-case: Heterogeneous cores

  14. STEAM achieves maximum energy savings with minimal loss of performance

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