On Wed, Aug 05, 2009 at 10:11:07AM +0200, Mirko Raasch wrote: > Hi, > > in my server i use an Intel Quad Core CPU and i want to use in one > WindowsXP guest all 4 cores. > The device manager shows four CPU (Qemu Virtual CPU version 0.10.5). > When i start prime95 or superpi, only 2 of them are in use. CPU-Z shows > also 2 Cores, instead of 4 like the device manager. I don't know what those apps are, but they sound broken to me. If the guest has been launched with 4 virtual CPus, the guest OS should be able to use them, regardless of what your host core/socket/thread cpu topology is. KVM/QEMU allow upto 16 virtual CPUs IIRC, and this is totally independant of how many physical CPUs you have. Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :| -- Libvir-list mailing list Libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list