Kvm manually set cpu topology

Recommendations for KVM CPU model configuration on x86 hosts¶ The information that follows provides recommendations for configuring CPU models on x86 hosts. The goals are to maximise performance, while protecting guest OS against various CPU hardware flaws, and optionally enabling live migration between hosts with heterogeneous CPU models. The set of CPU features presented to the guest by KVM depends on the CPU model chosen in the guest virtual machine configuration. qemu32 and qemu64 are basic CPU models, but there are other models (with additional features) available. Each model and its topology is specified using the following elements from the domain XML. Note that every hypervisor has its own policy for which CPU features guest will see by default. The set of CPU features presented to the guest by QEMU/KVM depends on the CPU model chosen in the guest virtual machine configuration. qemu32 and qemu64 are basic CPU models but there are other models (with additional features) available. Each model and its topology is specified using the following .

In KVM Virt-Manager click on the "CPUs" tool, Check the "Manually set CPU topology" box, Assign 1 socket (this is what is limited by windows home), I've got an K CPU so selected 3 cores and 2 threads. "Current allocation" auto enter is then "6" (of 12 available). windows reports 6 virtual cores. In libvirt, the CPU is specified by providing a base CPU model name (which is a shorthand for a set of feature flags), a set of additional feature flags, and the topology (sockets/cores/threads). The libvirt KVM driver provides a number of standard CPU model names. CPU Model and Topology. This section covers the requirements for CPU model. Note that every hypervisor has its own policy for which CPU features guest will see by default. The set of CPU features presented to the guest by QEMU/KVM depends on the CPU model chosen in the guest virtual machine configuration. qemu32 and qemu64 are basic CPU.

Recommendations for KVM CPU model configuration on x86 hosts¶ The information that follows provides recommendations for configuring CPU models on x86 hosts. The goals are to maximise performance, while protecting guest OS against various CPU hardware flaws, and optionally enabling live migration between hosts with heterogeneous CPU models. Note that every hypervisor has its own policy for which CPU features guest will see by default. The set of CPU features presented to the guest by QEMU/KVM depends on the CPU model chosen in the guest virtual machine configuration. qemu32 and qemu64 are basic CPU models but there are other models (with additional features) available. Each model and its topology is specified using the following elements from the domain XML. The cpuset option for virt-install can use a CPU set of processors or the parameter auto. The auto parameter automatically determines the optimal CPU locking using the available NUMA data. For a NUMA system, use the --cpuset=auto with the virt-install command when creating new guests.