Path-Classified Trace Cache for Improving Hit Ratio in Wide-Issue Processors

Jin-Hyuk YANG  In-Cheol PARK  Chong-Min KYUNG  

IEICE TRANSACTIONS on Information and Systems   Vol.E82-D   No.10   pp.1338-1343
Publication Date: 1999/10/25
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: PAPER
Category: Computer Hardware and Design
superscalar,  instruction fetch,  trace cache,  

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In this paper, an instruction-cache scheme called Multi-Path Tracing is proposed to enhance the trace cache. Paths are classified to improve the trace cache hit ratio by reducing the path conflict and basic blocks are joined to reduce the hardware cost needed to implement the trace cache. Simulation results for various SPEC integer benchmarks show that the proposed scheme increases the hit ratio by more than 25% and the effective fetch size by 10%.