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Load imbalance cause significant performance degradation in High Performance Computing applications. In our previous work we showed that load imbalance can be alleviated by modern MT processors that provide mechanisms for controlling the allocation of processors internal resources. In that work, we applied static, hand-tuned resource allocations to balance HPC applications, providing improvements...
Due to the limitations of instruction-level parallelism, thread-level parallelism has become a popular way to improve processor performance. One example is the IBM POWER5TM processor, a two-context simultaneous-multithreaded dual-core chip. In each SMT core, the IBM POWER5 features two levels of thread resource balancing and prioritization. The first level provides automatic in-hardware resource balancing,...
Many studies have shown that load imbalancing causes significant performance degradation in high performance computing (HPC) applications. Nowadays, multi-threaded (MT1) processors are widely used in HPC for their good performance/energy consumption and performance/cost ratios achieved sharing internal resources, like the instruction window or the physical register. Some of these processors provide...
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