Re: [libvirt] Problem setting CPU topology

Hi, I'm trying to set exact CPU topology to qemu-kvm domains to match host's topology. In my case, host topology is: 1 socket, 2 cores and 2 threads. If I set the XML like this:

The qemu commandline launched for this domain looks like this: /usr/bin/qemu-kvm -name fedora17-2 -S -M pc-0.15 -cpu core2duo,+lahf_lm,+rdtscp,+aes,+popcnt,+sse4.2,+sse4.1,+pdcm,+xtpr,+cx16,+tm2,+est,+smx,+vmx,+ds_cpl,+dtes64,+pclmuldq,+pbe,+tm,+ht,+ss,+acpi,+ds -enable-kvm -m 1152 -smp 4,sockets=1,cores=2,threads=2 -uuid

Despite the '-smp 4,sockets=1,cores=2,threads=2', I see only 1 CPU reported by '/proc/cpuinfo' in the guest F17 live. However, when I manually launch a very similar commandline,': /usr/bin/qemu-kvm -name fedora17-2 -M pc-0.15 -cpu core2duo,+lahf_lm,+rdtscp,+aes,+popcnt,+sse4.2,+sse4.1,+pdcm,+xtpr,+cx16,+tm2,+est,+smx,+vmx,+ds_cpl,+dtes64,+pclmuldq,+pbe,+tm,+ht,+ss,+acpi,+ds -m 1G -smp 4,cores=2,threads=2,sockets=1 -uuid c573342b-2876-05b8-098e-6d5314cab062 -nodefconfig -enable-kvm -cdrom /home/zeenix/ISOs/Fedora-17-i686-Live-Desktop.iso I see 4 CPUs reported by '/proc/cpuinfo in the guest. Any clues?