The quest for greater computational power is never-ending. Recently, the architectural trend has shifted from improving single-threaded application performance to improving multi-threaded application performance. Thus, multi-core processors have been increasingly popular. To achieve concurrent execution of threads on multi-core processors, applications must be explicitly restructured to exploit parallelism, either by programmers or compilers. However, conventional parallel programming models may introduce overhead due to synchronization and communications among threads in multi-threaded applications. This book presents three architectural optimizations to improve thread-based synchronization and communications support in multi-core processors. Register-Based Synchronization (RBS) uses hardware registers efficiently to provide synchronization support in multi-core processors. Prepushing is a software controlled data forwarding technique to provide communications support in multi-core processors. Software Controlled Eviction (SCE) improves shared cache communications by placing shared data in shared caches.

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