Hi In 4.10.1. Creating a High Performance Virtual Machine, Template, or Pool https://www.ovirt.org/documentation/virtual_machine_management_guide/index.h... I need some help trying to understand this section, please see my comments "> inline". <-- snip Pinning topology: The first two CPUs of each NUMA node are pinned.

OK, so the first 2 pCPUs of the NUMA node are used for I/O and emulator threads.

If all vCPUs fit into one NUMA node of the host:

Yes, they do ...

The first two vCPUs are automatically reserved/pinned

Are the first 2 vCPUs automatically pinned to the I/O and Emulator thread pCPUs mentioned in previous point?

The remaining vCPUs are available for manual vCPU pinning <-- snip So if I create a High Performance VM with 6 vCPUs, I should:  - Don't pin vCPUs 0 and 1  - Do pin vCPUs 2,3,4 and 5 All other High Performance VMs within the same NUMA node have their first 2 vCPUs automatically pinned (presumably to the I/O and emulator thread pCPUs) What do you think? Thanks Angus