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

摘要

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 reduc- ing 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 pro- posed scheme increases the hit ratio by more than 25% and the effective fetch size by 10%.