Preparations for Hybrid Architectures

[marenz2569]

Currently FS is designed for homogenous architectures. This means that CPU detection, function selection and optimization will not work as expected on heterogenous systems. This includes systems with different core types as well as different number of hardware threads (even on the same core types).

DoD

• Redesign the CPUTopology class to give back information about different core kinds and their properties.
  • HardwareThread lives on a Core with a specific number of other HardwareThreads
  • HardwareThread is contained in a Core
  • Sets of HardwareThreads that are on the same core type with the same number of parallel HardwareThreads
  • This functionality will be implemented with hwloc and should be tested with hwloc topology information that can be dumped as xml
• Redesign payload detection to use a specific payload per set of HardwareThreads as defined above
  • Provide options to allow selecting the function per Set based on index and/or abstraction to P/E cores
• Allow the selection of which set to use for measurement/optimization and how the other sets should be stress/not stressed