A Study of Thread Migration in Temperature-Constrained Multicores
SourceACM Transactions on Architecture and Code Optimization
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Temperature has become an important constraint in high-performance processors, especially multicores. Thread migration will be essential to exploit the full potential of future thermally constrained multicores.We propose and study a thread migration method that maximizes performance under a temperature constraint, while minimizing the number of migrations and ensuring fairness between threads.We show that thread migration brings important performance gains and that it is most effective during the first tens of seconds following a decrease of the number of running threads. © 2007, ACM. All rights reserved.