Context-Base Computational Value Prediction with Value Compression
Context-Base Computational Value Prediction with Value Compression
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发表时间:
2018
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通讯作者:
Y. Ishii;Arm;Y. Ishii
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作者:
Y. Ishii;Arm;Y. Ishii
In this paper, we propose context-base computation value prediction and aggressive cost reduction techniques exploiting value locality. Context-base computational value prediction tracks both base value and its stride for corresponding context to cover context-dependent delta patterns. We also propose an aggressive value compression scheme using value compression cache. This cache tracks higher order bits of tracking values. To maximize the storage efficiency, the data can be cached only after the predicting value have a certain confidence. We applied these proposals and dynamic coverage accuracy control on TAGE inspired value predictor, CBC-VTAGE. With 8KB storage budget, our optimized CBC-VTAGE achieves 17.1% speedup compared with processor without value prediction. The geomean of IPC for distributed 135 traces is 3.76.