Specialized Dynamic Optimizations for High-Performance Energy-Efficient Microarchitecture

We study several major characteristics of dynamic optimization within the PARROT power-aware, trace-cachebased microarchitectural framework. We investigate the benefit of providing optimizations which although tightly coupled with the microarchitecture in substance are decoupled in time. The tight coupling in substance provides the potential for tailoring optimizations for microarchitecture in a manner impossible or impractical not only for traditional static compilers but even for a JIT. We show that the contribution of common, generic optimizations to processor performance and energy efficiency may be more than doubled by creating a more intimate correlation between hardware specifics and the optimizer. In particular, dynamic optimizations can profit greatly from hardware supporting fused and SIMDified operations. At the same time, the decoupling in time allows optimizations to be arbitrarily aggressive without significant performance loss. We demonstrate that requiring up to 512 re...

• Type: Conference
• Year: 2004
• Where: CGO
• Authors: Yoav Almog, Roni Rosner, Naftali Schwartz, Ari Schmorak
• Keywords: CGO 2004, Dynamic Optimizations, Generic Optimizations, Software Engineering, Time Allows Optimizations