A Reconfigurable Load and Performance Balancing Scheme for Parallel Loops in a Clustered Computing Environment

클러스터 컴퓨팅 환경에서 병렬루프 처리를 위한 재구성 가능한 부하 및 성능 균형 방법

  • 김태형 (한양대학교 전자컴퓨터공학부)
  • Published : 2004.02.01


Load imbalance is a serious impediment to achieving good performance in parallel processing. Global load balancing schemes cannot adequately manage to balance parallel tasks generated from a single application. Dynamic loop scheduling methods are known to be useful in balancing parallel loops on shared-memory multiprocessor machines. However, their centralized nature causes a bottleneck for the relatively small number of processors in a network of workstations because of order-of-magniture differences in communication overheads. Moreover, improvements of basis loops scheduling methods have not effectively dealt with irregularly distributed workloads in parallel loops, which commonly occur in applications for a network of workstation. In this paper, we present a new reconfigurable and decentralized balancing method for parallel loops on a network of workstations. Since our method supplements performance balancing with those tranditional load balancing methods, it minimizes the overall execution time.


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