id summary reporter owner description type status component version resolution keywords cc guest host 5633 Centos Host/Guest SMP imbalance and slow performance Jonathan Deitch "Host is Centos 5.3 (dual quad core Xeon, IBM x3650) Guest is Centos 4.8 configured for dual core SMP Both Centos systems are stock, with updates from the centos and rpmforge repositories. Guest runs very slow, performance is noticeably affected. /proc/cpuinfo in the guest shows a massive imbalance between the detected smp cores provided to the guest OS. The same command on the host shows different results and values. " defect closed guest smp VirtualBox 3.1.0 worksforme smp slow centos Linux Linux