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OF THE DISSERTATION A HARDWARE AND SOFTWARE INTEGRATED APPROACH FOR ADAPTIVE THREAD MANAGEMENT IN MULTICORE MULTITHREADED MICROPROCESSORS by Lichen Weng Florida International University, 2012 Miami, Florida Professor Chen Liu, Major Professor The Multicore Multithreaded Microprocessor maximizes parallelism on a chip for the optimal system performance, such that its popularity is growing rapidly in high-performance computing. It increases the complexity in resource distribution on a chip by leading it to two directions: isolation and unification. On one hand, multiple cores are implemented to deliver the computation and memory accessing resources to more than one thread at the same time. Nevertheless, it limits the threads’ access to resources in different cores, even if extensively demanded. On the other hand, simultaneous multithreaded architectures unify the domestic execution resources together for concurrently running threads. In such an environment, threads are greatly affected by the inter-thread interference. Moreover, the impacts of the complicated distribution are enlarged by variation in workload behaviors. As a result, the microprocessor requires an adaptive management scheme to schedule threads throughout different cores and coordinate them within cores. In this study, an adaptive thread management scheme was proposed, integrating both hardware and software approaches. The instruction fetch policy at the hardware level took the responsibility by prioritizing domestic threads, while the Operating System scheduler at the software level was used to pair threads dynami-

A Hardware and Software Integrated Approach for Adaptive Thread Management in Multicore Multithreaded Microprocessors