In this paper, we propose a technique that uses an additional mini cache, the L0-Cache, located between the instruction cache I-Cache and the CPU core. This mechanism can provide the instruction stream to the data path and, when managed properly, it can e ectively eliminate the need for high utilization of the more expensive I-Cache. In this work, we propose, implement, and evaluate a series of run-time techniques for dynamic analysis of the program instruction access behavior, which are then

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... ed to proactively guide the access of the L0-Cache. The basic idea is that only the most frequently executed portions of the code should be stored in the L0-Cache since this is where the program spends most of its time. We present experimental results to evaluate the e ectiveness of our scheme in terms of performance and energy dissipation for a series of SPEC95 benchmarks. We also discuss the performance and energy tradeo s that are involved in these dynamic schemes.