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Cache conscious data layout organization for embedded multimedia applications

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5 Author(s)

Cache misses form a major bottleneck for real-time multimedia applications due to the off-chip accesses to the main memory. This results in both a major access bandwidth overhead (and related power consumption) as well as performance penalties. In this paper, we propose a new technique for organizing data in the main memory for data dominated multimedia applications so as to reduce majority of the conflict cache misses. The focus of this paper is on the formal and heuristic algorithms we use to steer the data layout decisions and the experimental results obtained using a prototype tool. Experiments on real-life demonstrators illustrate that we are able to reduce up to 82% of the conflict misses for applications that are already aggressively transformed at the source-level. At the same time, we also reduce the off-chip data accesses by up to 78% and combined with address optimizations we are able to reduce the execution time. Thus our approach is complimentary to the more conventional way of reducing misses by reorganizing the execution order

Published in:

Design, Automation and Test in Europe, 2001. Conference and Exhibition 2001. Proceedings

Date of Conference:

2001

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