----- Original Message ----- > From: "Brent Troge" <brenttroge2...@gmail.com> > To: openstack@lists.openstack.org > Sent: Friday, July 8, 2016 9:59:58 AM > Subject: [Openstack] vCPU -> pCPU MAPPING > > context - high performance private cloud with cpu pinning > > Is it possible to map vCPUs to specific pCPUs ? > Currently I see you can only direct which vCPUs are mapped to a specific > NUMA node > > hw:numa_cpus.0=1,2,3,4
Just in addition to Jay's comment, the above does not do what I suspect you think it does. The above tells Nova to expose vCPUs 1, 2, 3, and 4 in *guest* NUMA node 0 when building the guest NUMA topology in the Libvirt XML. Nova will endeavor to map these vCPUs to pCPUs on the same NUMA node on the host as *each other* but that will not necessarily be NUMA node *0* on the host depending on resource availability. Thanks, Steve > However, to get even more granular, is it possible to create a flavor which > maps vCPU to specific pCPU within a numa node ? > > Something like: > hw:numa_cpus.<NUMA-NODE>-<pCPU>=<vCPU> > > hw:numa_cpus.0-1=1 > hw:numa_cpus.0-2=2 > > > Thanks! > > _______________________________________________ > 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 > _______________________________________________ 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
