Hi, I've been working on trying to figure out why my virtual machine keeps crashing when I don't believe I have a hardware problem, and I believe I might know why. As I'm relatively new to this, I believe I may have misconfigured the XML file to try and maximize the CPU features that are available to the guest from the host. I have an Intel Xeon E3-1240 3.3Ghz quad-core. How can I properly configure the XML file to transparently make available as many of the CPU features as possible to the guest? I have read cpu_map.xml, and my processor has more capabilities than anything listed. I've now configured the <cpu> section to read as follows: <cpu> <topology sockets='1' cores='4' threads='2'/> </cpu> The guest processor still seems to indicate there is only one core, despite there being 7 processors? Below is the cpuinfo from the host, followed by that of the guest: processor : 7 vendor_id : GenuineIntel cpu family : 6 model : 42 model name : Intel(R) Xeon(R) CPU E31240 @ 3.30GHz stepping : 7 cpu MHz : 3301.000 cache size : 8192 KB physical id : 0 siblings : 8 core id : 3 cpu cores : 4 apicid : 7 initial apicid : 7 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 x2apic popcnt aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid bogomips : 6584.20 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: Guest: processor : 7 vendor_id : GenuineIntel cpu family : 6 model : 2 model name : QEMU Virtual CPU version 0.14.0 stepping : 3 cpu MHz : 3292.520 cache size : 4096 KB physical id : 0 siblings : 8 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 4 wp : yes flags : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36 clflush mmx fxsr sse sse2 ht syscall nx lm rep_good nopl pni cx16 popcnt hypervisor lahf_lm bogomips : 6585.04 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: Any ideas greatly appreciated. Thanks, Alex