SIMULATION OF MANYCORE ARCHITECTURES ON MULTICORE HOSTS

[摘要] Computer architects heavily rely on software simulation to evaluate new and existing processor designs. As target designs become more complex, a growing gap has emerged between single-threaded simulator performance and simulation requirements. Even though modern machines feature multiple cores, most host cores are typically unused or underutilized by state-of-the-art simulators. Parallel simulators are inherently limited by their need to synchronize threads for correctness. In my thesis, I study accurate and efficient parallelization techniques for architecture simulation.This thesis contains several contributions. First, I study synchronization between simulator threads simulating homogeneous hardware structures such as cores or network tiles. Based on this study, I introduce a new synchronization policy, weighted-tuple synchronization,and show that it provides a better performance-accuracy trade-off compared to synchronization currently used by state-of-the-art parallel simulators. Next, I study synchronization between separate simulators responsible for modeling heterogeneous components and introduce reciprocal abstraction. Reciprocal abstraction allows asynchronous simulators to exchange information at runtime for more accurate event timing. Lastly, the reciprocal abstraction model relaxes communication latency restrictions and synchronization requirements;I show how relaxed synchronization requirements allows for coprocessor acceleration.

[发布机构] the University of Pittsburgh