Task scheduling algorithms for heterogeneous processors

Topcuoglu H. R. , Hariri S., Wu M.

8th Heterogeneous Computing Workshop (HCW 99), San Juan, Argentina, 12 April 1999, pp.3-14 identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/hcw.1999.765092
  • City: San Juan
  • Country: Argentina
  • Page Numbers: pp.3-14


Scheduling computation tasks on processors is the key issue for high-performance computing. Although a large number of scheduling heuristics have been presented in the literature, most of them target only homogeneous resources. The existing algorithms for heterogeneous domains are not generally efficient because of their high complexity and/or the quality of the results. We present two low-complexity efficient heuristics, the Heterogeneous Earliest-Finish-Time (HEFT) Algorithm and the Critical-Path-on-a-Processor (CPOP) Algorithm for scheduling directed acyclic weighted task graphs (DAGs) on a bounded number of heterogeneous processors. We compared the performances of these algorithms against three previously proposed heuristics. The comparison study showed that our algorithms outperform previous approaches in terms of performance (schedule length ratio and speedup) and cost (time complexity).