VRCon: Dynamic reconfiguration of voltage regulators in a multicore platform

Woojoo Lee, Yanzhi Wang, Massoud Pedram

Research output: Chapter in Book/Entry/PoemConference contribution

16 Scopus citations


The emerging trend toward utilizing chip multi-core processors (CMPs) that support dynamic voltage and frequency scaling (DVFS) is driven by user requirements for high performance and low power. To overcome limitations of the conventional chip-wide DVFS and achieve the maximum possible energy saving, per-core DVFS is being enabled in the recent CMP offerings. While power consumed by the CMP is reduced by per-core DVFS, power dissipated by many voltage regulators (VRs) needed to support per-core DVFS becomes critical. This paper focuses on the dynamic control of the VRs in a CMP platform. Starting with a proposed platform with a configurable VR-to-core power distribution network, two optimization methods are presented to maximize the system-wide energy savings: (i) reactive VR consolidation to reconfigure the network for maximizing the power conversion efficiency of the VRs performed under the pre-determined DVFS levels for the cores, and (ii) proactive VR consolidation to determine new DVFS levels for maximizing the total energy savings without any performance degradation. Results from detailed experiments demonstrate up to 35% VR energy loss reduction and 14% total energy saving.

Original languageEnglish (US)
Title of host publicationProceedings - Design, Automation and Test in Europe, DATE 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9783981537024
StatePublished - 2014
Externally publishedYes
Event17th Design, Automation and Test in Europe, DATE 2014 - Dresden, Germany
Duration: Mar 24 2014Mar 28 2014

Publication series

NameProceedings -Design, Automation and Test in Europe, DATE
ISSN (Print)1530-1591


Other17th Design, Automation and Test in Europe, DATE 2014


  • Consolidation
  • DC-DC converter
  • Low-power design
  • Multicore
  • Power delivery network

ASJC Scopus subject areas

  • General Engineering


Dive into the research topics of 'VRCon: Dynamic reconfiguration of voltage regulators in a multicore platform'. Together they form a unique fingerprint.

Cite this