Although if you like or have code suitable for a multicore architecture you would get better performance from a Xeon Phi or the forthcoming Knight's Landing fro

Although if you like or have code suitable for a multicore architecture you would get better performance from a Xeon Phi or the forthcoming Knight's Landing from Intel, both of which run x86_64 Linux. Between ARM, OpenPower and Intel's Phi successors this is becoming a hyper-competitive space. Interesting times ahead!