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Code positioning to reduce instruction cache misses in signal processing applications on multimedia RISC processors

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3 Author(s)
Stolberg, H.-J. ; Lab. for Inf. Technol., Hannover Univ., Germany ; Ikekawa, Masao ; Kuroda, I.

Real-time operation of signal processing applications on multimedia RISC processors is often limited by high instruction cache miss rates of direct-mapped caches. In this paper, a heuristic approach is presented which reduces high instruction cache miss rates in direct-mapped caches by code positioning. The proposed algorithm rearranges functions in memory based on trace data so as to minimize cache line conflicts. Moreover, a new method to extract potential cache misses from trace data is introduced which enables accurate cache behavior analysis and greatly enhances code positioning efficiency. Application of code positioning to an MPEG-1 video decoder implementation on the V830 multimedia RISC processor reduced instruction cache refill cycles by 66-98%. The proposed code positioning algorithm does not require hardware modifications; it can easily be integrated in an object linker to automate the optimization process

Published in:

Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on  (Volume:1 )

Date of Conference:

21-24 Apr 1997

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