Optimizing energy efficiency of 3-D multicore systems with stacked DRAM under power and thermal constraints

  • Authors:
  • Jie Meng;Katsutoshi Kawakami;Ayse K. Coskun

  • Affiliations:
  • Boston University, Boston, MA;Boston University, Boston, MA;Boston University, Boston, MA

  • Venue:
  • Proceedings of the 49th Annual Design Automation Conference
  • Year:
  • 2012

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Abstract

3D multicore systems with stacked DRAM have the potential to boost system performance significantly; however, this performance increase may cause 3D systems to exceed the power budget or create thermal hot spots. This paper introduces a framework to model on-chip DRAM accesses and analyzes performance, power, and temperature tradeoffs of 3D systems. We propose a runtime optimization policy to maximize performance while maintaining power and thermal constraints. Our policy dynamically monitors workload behavior and selects among low-power and turbo operating modes accordingly. Experiments with multithreaded workloads demonstrate up to 49% energy efficiency improvements compared to existing thermal management policies.