Need more compute servers but don't have room for them? Or maybe one doesn't have enough electrical capacity to feed them, or enough cooling capacity? One is not alone. Multi-core processors may be the solution. However, while multi-core processors may solve many of the problems associated with compute cluster sprawl, they also present a new challenge: in some situations they cannot provide sufficient memory bandwidth per core to satisfy the requirements of certain HPC applications. This paper discusses methods to mitigate the effects of memory bandwidth limitations on modern multicore processors.
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