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  • Research Article
  • Open Access

Thermal-Aware Scheduling for Future Chip Multiprocessors

EURASIP Journal on Embedded Systems20072007:048926

  • Received: 10 July 2006
  • Accepted: 29 January 2007
  • Published:


The increased complexity and operating frequency in current single chip microprocessors is resulting in a decrease in the performance improvements. Consequently, major manufacturers offer chip multiprocessor (CMP) architectures in order to keep up with the expected performance gains. This architecture is successfully being introduced in many markets including that of the embedded systems. Nevertheless, the integration of several cores onto the same chip may lead to increased heat dissipation and consequently additional costs for cooling, higher power consumption, decrease of the reliability, and thermal-induced performance loss, among others. In this paper, we analyze the evolution of the thermal issues for the future chip multiprocessor architectures and show that as the number of on-chip cores increases, the thermal-induced problems will worsen. In addition, we present several scenarios that result in excessive thermal stress to the CMP chip or significant performance loss. In order to minimize or even eliminate these problems, we propose thermal-aware scheduler (TAS) algorithms. When assigning processes to cores, TAS takes their temperature and cooling ability into account in order to avoid thermal stress and at the same time improve the performance. Experimental results have shown that a TAS algorithm that considers also the temperatures of neighboring cores is able to significantly reduce the temperature-induced performance loss while at the same time, decrease the chip's temperature across many different operation and configuration scenarios.


  • Thermal Stress
  • Embed System
  • Heat Dissipation
  • Performance Loss
  • Single Chip

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Authors’ Affiliations

Department of Computer Science, University of Cyprus, 75 Kallipoleos Street, P.O. Box 20537, Nicosia, 1678, Cyprus


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© K. Stavrou and P. Trancoso. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.