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An ILP Approach to the Slack Driven Scheduling Problem Shih-Hsu HUANG Chun-Hua CHENG Publication IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Vol.E89-A No.6 pp.1852-1858 Publication Date: 2006/06/01 Online ISSN: 1745-1337 DOI: 10.1093/ietfec/e89-a.6.1852 Print ISSN: 0916-8508 Type of Manuscript: LETTER Category: VLSI Design Technology and CAD Keyword: high-level synthesis, integer linear programming, scheduling, slack optimization, Full Text: PDF(209.5KB)>>
Summary: With the advent of deep sub-micron era, there is a demand to consider the design closure problem in high-level synthesis. It is well known that the slack is an effective means of tolerating the uncertainties in operation delays. Previous work ever attempted to increase the usable slack based on a given initial schedule. Instead of the post-processing approach, this paper is the first attempt to the simultaneous application of operation scheduling and slack optimization. We use a 0-1 integer linear programming (0-1 ILP) approach to formally formulate the problem. Under the design constraints (timing and resource), our approach is applicable to two different objective functions: the maximization of the total usable slack and the maximization of the number of non-zero slack operations. Compared with previous work, our approach has the following two advantages: first, our approach guarantees the optimality; second, our approach is more suitable for the design space exploration. | ||||||||||
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