[Openstack] [OpenStack][Nova] NUMA Topology together with requested PCI devices Schedule Failed

Xu, Rongjie (Nokia - CN/Hangzhou) rongjie.xu at nokia.com
Mon Mar 13 09:06:39 UTC 2017


I want to know whether SRIOV VF can be used cross socket (e.g PF is on socket 0, so its VFs also on socket 0, and VM is on socket 1).

My testing is to launch several VMs with dedicated vCPU with VF. Firstly, I saw VMs are located on socket 0. When the CPUs on socket 0 are used up, I expect VM can be scheduled to socket 1 or some error happens. In indeed, I got following errors:

Insufficient compute resources: Requested instance NUMA topology together with requested PCI devices cannot fit the g", "code": 500, "details": "  File \"/usr/lib/python2.7/dist-packages/nova/conductor/manager.py\", line 393, in build_instances

But what I cannot understand is what does "NUMA topology" indicate here? How it is related to NUMA topology? Can anybody help explain?

Best Regards
Xu Rongjie (Max)

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