2010/5/28 Marcelino Mata <mmata at multimatic.com>: > Has anyone had any success getting WinXP 32bit to use 4 CPU's under > Centos 5.5 KVM? > > I have tried everything and the best I can get is 2 CPU's. I tried > everything listed here > http://www.linux-kvm.com/content/running-windows-smp-guests I am using > the VIRTIO drivers. As it is discussed in the comments on the page you have linked above, XP only supports 2 CPUs but more cores. AFAIK KVM will always emulate CPUs not cores. Best Regards Kenni