Chapter 13

Exploring Use of the Reserved Core

John Holmen; Alan Humphrey; Martin Berzins    SCI Institute and School of Computing, University of Utah, USA


This chapter discusses application usage of the “reserved” core on an Intel Xeon Phi coprocessor through an examination of multiple thread placement strategies. In doing so, this chapter also seeks to extend discussion on less conventional thread management techniques when using a centralized scheduler model, and look at the interoperability of MPI and PThreads.


61st core

Compact affinity

Control thread

Main thread


Radiation modeling

Reserved core

Reverse Monte-Carlo ray tracing


Scatter affinity

Selective affinity

Thread affinity

Thread placement

Uintah ...

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