How many virtual CPUs can be given to a Virtual Machine in Xen?

Solution Verified - Updated -

Issue

  • Query on virtual cpu concept in Xen virtualization. There are 4 quad core processor in server (ie.total cores are 16). Processor options in hardware tab of virt-manager shows the following options.

How many virtual CPUs should be allocated to this machine.
current allocation           4
change allocation            4 
Maximum allocation          32 
Total CPUs on host machine  16

How did it calculate 32 cpus in maximum allocation? Does it mean, create Virtual Machines up to 32 processors utilisation? or 32 VMs with single processor each?

Environment

  • Red Hat Enterprise Linux 5.4
  • Xen

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Close

Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.