SimPoint+: More Stable, Accurate and Efficient Program Analysis.

This paper introduces SimPoint+, an enhanced sampled simulation methodology that addresses key limitations of the widely-used SimPoint approach. SimPoint+ achieves greater stability, accuracy, and efficiency in program analysis through three major improvements: (1) UMAP-based dimensionality reduction for Basic Block Vectors, (2) a two-stage clustering approach utilizing HDBSCAN, and (3) a lightweight cycle calibration method. Furthermore, an automated hyperparameter tuning strategy accommodates diverse program characteristics for the first two models. Evaluation of SPEC CPU 2006 benchmarks demonstrates that SimPoint+ significantly outperforms SimPoint by yielding more consistent results across runs, reducing cycle error rates by 3–5 orders of magnitude, and decreasing required simulation time by 25