Reserved Cores in the Intel Xeon Phi

"In the case of the Intel Xeon Phi coprocessor, although 60 cores are commonly used for computation, there is another core that is available, but not traditionally used as part of a simulation. Experiments using the 61st core for actual computation while running a reverse Monte Carlo ray tracing application for the modeling of radiative heat transfer, demonstrated that the use of another core improved performance, and that oversubscribing the coprocessor operating system thread did not degrade the performance."

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