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While several hardware mechanisms have been proposed to control the interaction between hardware threads in an SMT processor, few have addressed the issue of software-controllable SMT performance. The IBM POWER5 and POWER6 are the first high-performance processors implementing a software-controllable hardware-thread prioritization mechanism that controls the rate at which each hardware-thread decodes...
Microprocessor architectures have become increasingly power limited in recent years. Currently power and thermal envelopes dictate peak performance limits more than any other design constraint. As voltage scaling has slowed down, innovative techniques have been pursued to improve the power efficiency of the increasingly demanding multi-core architectures. In this paper we look at recent trends in...
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