mem KVM testing on CentOS 7.5.1804 via the Phoronix Test Suite. 8192 MB RAM QEMU: Processor: Intel Xeon Gold 6151 @ 3.00GHz (2 Cores / 4 Threads), Motherboard: OpenStack Foundation Nova (rel-1.10.2-0-g5f4c7b1-20180426_105716-build10b177b187b177 BIOS), Memory: 1 x 8192 MB RAM QEMU, Disk: 40GB, Graphics: cirrusdrmfb OS: CentOS 7.5.1804, Kernel: 3.10.0-862.14.4.el7.x86_64 (x86_64), Compiler: GCC 4.8.5 20150623, File-System: ext4, Screen Resolution: 1024x768, System Layer: KVM Stream 2013-01-17 Type: Copy MB/s > Higher Is Better 8192 MB RAM QEMU . 37391 |===================================================== Stream 2013-01-17 Type: Scale MB/s > Higher Is Better 8192 MB RAM QEMU . 45091 |===================================================== Stream 2013-01-17 Type: Triad MB/s > Higher Is Better 8192 MB RAM QEMU . 48433 |===================================================== Stream 2013-01-17 Type: Add MB/s > Higher Is Better 8192 MB RAM QEMU . 48125 |=====================================================