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Multi-core architectures have become mainstream. Trends suggest that the number of cores integrated on a single chip will increase continuously. However, lock contention in operating systems can limit the parallel scalability on multi-cores so significantly that the speedup decreases with the increasing number of cores (thrashing). Although the phenomenon can be easily reproduced experimentally, most...
In this paper, we evaluate and compare the parallel scalability of three commodity operating systems (Linux, Solaris and FreeBSD) on an AMD 32-core platform. Measurements of microbenchmarks and a real-life application reveal that no operating system scales totally better than another for microbenchmarks; for the real-life application, Linux and Solaris are competitive in scalability and perform better...
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