cpubench KVM testing on CentOS Linux 7 via the Phoronix Test Suite. barebones: Processor: 2 x Intel Xeon E5645 @ 2.39GHz (24 Cores), Motherboard: Dell 0H19HD, Chipset: Intel 5500 I/O + ICH10R, Memory: 8 x 8192 MB DDR3-1333MHz, Disk: 1000GB PERC H700, Graphics: Matrox s MGA G200eW WPCM450, Network: Broadcom Limited NetXtreme II BCM5716 Gigabit OS: CentOS Linux 7, Kernel: 3.10.0-514.26.2.el7.x86_64 (x86_64), Compiler: GCC 4.8.5 20150623, File-System: xfs, Screen Resolution: 1024x768 vm: Processor: 24 x Westmere E56xx/L56xx/X56xx (Nehalem-C) @ 2.39GHz (24 Cores), Motherboard: Red Hat KVM, Chipset: Intel 440FX- 82441FX PMC, Memory: 1 x 16384 MB RAM, Disk: 197GB, Graphics: Red Hat QXL paravirtual graphic card, Audio: QEMU Generic, Network: Red Hat Virtio device OS: CentOS Linux 7, Kernel: 3.10.0-514.26.2.el7.x86_64 (x86_64), Compiler: GCC 4.8.5 20150623, File-System: ext4, Screen Resolution: 1024x768, System Layer: KVM Apache Benchmark 2.4.7 Static Web Page Serving Requests Per Second > Higher Is Better barebones . 7702.65 |========================================================== vm ........ 4546.89 |==================================