Max-flow scheduling in high-level synthesis

G. E. Liangwei, Song Chen, Kazutoshi Wakabayashi, Takashi Takenaka, Takeshi Yoshimura

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Scheduling, an essential step in high-level synthesis, is an intractable process. Traditional heuristic scheduling methods usually search schedules directly in the entire solution space. In this paper, we propose the idea of searching within an intermediate solution space (ISS). We put forward a max-flow scheduling method that heuristically prunes the solution space into a specific ISS and finds the optimum of ISS in polynomial time. The proposed scheduling algorithm has some unique features, such as the correction of previous scheduling decisions in a later stage, the simultaneous scheduling of all the operations, and the optimization of more complicated objectives. Aided by the max-flow scheduling method, we implement the optimization of the IC power-ground integrity problem at the behavior level conveniently. Experiments on well-known benchmarks show that without requiring additional resources or prolonging schedule latency, the proposed scheduling method can find a schedule that draws current more stably from a supply, which mitigates the voltage fluctuation in the on-chip power distribution network.

Original languageEnglish
Pages (from-to)1940-1948
Number of pages9
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Issue number9
Publication statusPublished - 2007 Sept


  • High-level synthesis
  • Power-ground integrity
  • Scheduling

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Graphics and Computer-Aided Design
  • Applied Mathematics
  • Signal Processing


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