Title :
Free MDD-based software optimization techniques for embedded systems
Author :
Kim, Chunghee ; Lavagno, Luciano ; Sangiovanni-Vincentelli, Alberto
Author_Institution :
Res. Inst. of Eng. & Tech., Hanyang Univ., Seoul, South Korea
Abstract :
Embedded systems make a heavy use of software to perform real-time embedded control tasks. Embedded software is characterized by a relatively long lifetime and by tight cost, performance and safety constraints. Several super-optimization techniques for embedded softwares based on multi-valued decision diagram (MDD) representations have been described in the literature, but they all share the same basic limitation. They are based on standard ordered MDD (OMDD) packages, and hence require a used order of evaluation for the MDD variables on every execution path. Free MDDs (FMDDs) lift this limitation, and hence open up more optimization opportunities. Finding the optimal variable ordering for FMDDs is a very difficult problem. Hence in this paper we describe a heuristic procedure that performs well in practice, and is based on FMDD cost estimation applied to recursive cofactoring. Experimental results show that our new variable ordering method obtains often. Smaller embedded software than previous (sifting-based) methods
Keywords :
decision diagrams; embedded systems; program testing; embedded systems; execution path; free MDD-based software optimization techniques; heuristic procedure; multi-valued decision diagram; recursive cofactoring; sifting-based methods; standard ordered MDD; Boolean functions; Control system synthesis; Control systems; Costs; Data structures; Embedded software; Embedded system; Hardware; Packaging; Software performance;
Conference_Titel :
Design, Automation and Test in Europe Conference and Exhibition 2000. Proceedings
Conference_Location :
Paris
Print_ISBN :
0-7695-0537-6
DOI :
10.1109/DATE.2000.840009