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Issue No.05 - May (2008 vol.19)
pp: 666-681
Multicore architectures are ruling the recent microprocessor design trend. This is due to different reasons: better performance, thread-level parallelism bounds in modern applications, ILP diminishing returns, better thermal/power scaling (many small cores dissipate less than a large and complex one); and, ease and reuse of design. This paper presents a thorough evaluation of multicore architectures. The architecture we target is composed of a configurable number of cores, a memory hierarchy consisting of private L1, shared/private L2, and a shared bus interconnect. We consider a benchmark set composed of several parallel shared memory applications. We explore the design space related to the number of cores, L2 cache size and processor complexity, showing the behavior of the different configurations/ applications with respect to performance, energy consumption and temperature. Design tradeoffs are analyzed, stressing the interdependency of the metrics and design factors. In particular, we evaluate several chip floorplans. Their power/thermal characteristics are analyzed, showing the importance of considering thermal effects at the architectural level to achieve the best design choice.
Parallel Architectures, Energy-aware systems, Shared memory, Measurement, evaluation, Modeling, simulation of, multiple-processor systems
Matteo Monchiero, Ramon Canal, Antonio Gonz?lez, "Power/Performance/Thermal Design-Space Exploration for Multicore Architectures", IEEE Transactions on Parallel & Distributed Systems, vol.19, no. 5, pp. 666-681, May 2008, doi:10.1109/TPDS.2007.70756
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