On 03/13/2017 03:06 AM, Xu, Rongjie (Nokia - CN/Hangzhou) wrote:
Hi, 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?
Currently nova does not support cross-socket usage, and the error message you're seeing reflects that. (Asking for pci devices results in specifying some restrictions on the guest, hence the "numa" related error message.)
There's a proposed spec to allow this requirement to be relaxed, see https://review.openstack.org/#/c/361140/18/specs/pike/approved/share-pci-between-numa-nodes.rst Chris _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
