Improved results for scheduling batched parallel jobs by using a generalized analysis framework

  • Authors:
  • Yuxiong He;Hongyang Sun;Wen-Jing Hsu

  • Affiliations:
  • School of Computer Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798;School of Computer Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798;School of Computer Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798

  • Venue:
  • Journal of Parallel and Distributed Computing
  • Year:
  • 2010

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Abstract

We present two improved results for scheduling batched parallel jobs on multiprocessors with mean response time as the performance metric. These results are obtained by using a generalized analysis framework where the response time of the jobs is expressed in two contributing factors that directly impact a scheduler's competitive ratio. Specifically, we show that the scheduler IGDEQ is 3-competitive against the optimal while AGDEQ is 5.24-competitive. These results improve the known competitive ratios of 4 and 10, obtained by Deng et al. and by He et al., respectively. For the common case where no fractional allotments are allowed, we show that slightly larger competitive ratios can be obtained by augmenting the schedulers with the round-robin strategy.