hello, Le Tue, Mar 20, 2012 at 02:38:22PM +0200, Gleb Natapov ecrivait : > > Try to add <feature policy='disable' name='hypervisor'/> to cpu > definition in XML and check command line. ok I try this but I can't use <cpu model> to map the host cpu (my libvirt is 0.9.8) so I use : <cpu match='exact'> <model>Opteron_G3</model> <feature policy='disable' name='hypervisor'/> </cpu> (the physical server use Opteron CPU). The log is here : http://www.roullier.net/Report/report-3.2-vhost-net-1vcpu-cpu.txt.gz And now with only 1 vcpu, the response time is 8.5s, great improvment. We keep this configuration for production : we check the response time when some other users are connected. David. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html