Looks like this has already been dealt with on Master via bug 1614054,
commit 6683bf9.
** Changed in: nova
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1654345
Title:
realtime emulatorpin should use pcpus, not vcpus
Status in OpenStack Compute (nova):
Invalid
Bug description:
When specifying "hw:cpu_realtime_mask" in the flavor,
LibvirtDriver._get_guest_numa_config() calls
hardware.vcpus_realtime_topology() to calculate "vcpus_rt" and
"vcpus_em". It then directly uses "vcpus_em" to set the "emulatorpin"
cpuset.
The problem is that libvirt expects the "emulatorpin" cpuset to be
specified as physical CPUs, not virtual CPUs.
This results in unexpected values being used for the emulator pinning.
The fix is to convert "vcpus_em" from vCPUs to pCPUs, and assign the
pCPUs to the "emulatorpin" cpuset.
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