CPU pinning with Hyperthreading and NUMA

Issue

• Need clarification on the effect of CPU Hyperthreading enabled at BIOS level with CPU pinning at the Hypervisor level
• Consider a system with:
  • 4 Sockets
  • 8 Cores
  • 2 Threads
• Using CPU pinning
• Requires NUMA boundaries to be respected
• Is CPU allocation done on a Core level (0-31) or on a Thread Level (0-63)?
• Is there a performance benefit to disabling Hyperthreading at the BIOS level?
• Does Red Hat and RHEVM account for Hyperthreading behind the scenes?