Energy-efficient adaptive pipelined MPSoCs for multimedia applications

Haris Javaid, Muhammad Shafique, Jorg Henkel, Sri Parameswaran

Research output: Contribution to journalArticlepeer-review

Abstract

Pipelined MPSoCs provide a high throughput implementation platform for multimedia applications. They are typically balanced at design-time considering worst-case scenarios so that a given throughput can be fulfilled at all times. Such worst-case pipelined MPSoCs lack runtime adaptability and result in inefficient resource utilization and high power/energy consumption under a dynamic workload. In this paper, we propose a novel adaptive architecture and a distributed runtime processor manager to enable runtime adaptation in pipelined MPSoCs. The proposed architecture consists of main processors and auxiliary processors, where a main processor uses differing number of auxiliary processors considering runtime workload variations. The runtime processor manager uses a combination of application's execution and knowledge, and offline profiling and statistical information to proactively predict the auxiliary processors that should be used by a main processor. The idle auxiliary processors are then deactivated using clock-or power-gating. Each main processor with a pool of auxiliary processors has its own runtime manager, which is independent of the other main processors, enabling a distributed runtime manager. Our experiments with an H.264 video encoder for HD720p resolution at 30 frames/s show that the adaptive pipelined MPSoC consumed up to 29% less energy (computed using processors and caches) than a worst-case pipelined MPSoC, while delivering a minimum of 28.75 frames/s. Our results show that adaptive pipelined MPSoCs can emerge as an energy-efficient implementation platform for advanced multimedia applications.

Original languageEnglish (US)
Article number6800588
Pages (from-to)663-676
Number of pages14
JournalIEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Volume33
Issue number5
DOIs
StatePublished - May 2014

Keywords

  • Multimedia applications
  • multiprocessor systemon-chip (MPSoC)
  • runtime adaptability

ASJC Scopus subject areas

  • Software
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering

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