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Prefetching for array data in embedded Java hardware accelerator

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3 Author(s)
Yi-Ruei Wu ; Department of Computer Science, National Chiao Tung University, 1001 University Road, Hsinchu, Taiwan, R.O.C. ; Yu-Sheng Chen ; Jean Jyh-Jiun Shann

For improving the efficiency of a program, it is important to reduce stalls caused by memory access. Traditional programs usually spend much time on memory stalls when accessing lower-level memory, and so do Java programs. In order to reduce memory stall time, prefetching is a feasible solution. We observed some obvious properties of array access so that we could prefetch array data by taking advantage of these properties. We analyzed these properties and proposed a suitable array prefetching mechanism for embedded Java hardware accelerators so as to reduce the time spent on memory stalls. Our approach eliminates about 25% of array stall time on average and even up to 50% for some array-based programs.

Published in:

VLSI Design, Automation and Test, 2009. VLSI-DAT '09. International Symposium on

Date of Conference:

28-30 April 2009