testmem Xen HVM domU 4.2.amazon testing on Ubuntu 18.04 via the Phoronix Test Suite. Intel Xeon E5-2666 v3: Processor: Intel Xeon E5-2666 v3 @ 2.90GHz (4 Cores), Motherboard: Xen HVM domU, Chipset: Intel 440FX- 82441FX PMC, Memory: 8192MB, Disk: 97GB, Graphics: Cirrus Logic GD 5446, Network: Intel 82599 Virtual Function OS: Ubuntu 18.04, Kernel: 4.15.0-1057-aws (x86_64), File-System: ext4, System Layer: Xen HVM domU 4.2.amazon RAMspeed SMP 3.5.0 Integer Add MB/s > Higher Is Better Intel Xeon E5-2666 v3 . 20539.51 |============================================= RAMspeed SMP 3.5.0 Integer Copy MB/s > Higher Is Better Intel Xeon E5-2666 v3 . 17898.81 |============================================= RAMspeed SMP 3.5.0 Integer Scale MB/s > Higher Is Better Intel Xeon E5-2666 v3 . 17676.34 |============================================= RAMspeed SMP 3.5.0 Floating-Point Add MB/s > Higher Is Better Intel Xeon E5-2666 v3 . 20115.57 |============================================= Stream 2013-01-17 Add MB/s > Higher Is Better Intel Xeon E5-2666 v3 . 24160.94 |============================================= Stream 2013-01-17 Copy MB/s > Higher Is Better Intel Xeon E5-2666 v3 . 32842.25 |============================================= Stream 2013-01-17 Scale MB/s > Higher Is Better Intel Xeon E5-2666 v3 . 21999.83 |============================================= Tinymembench 2018-05-28 Phoronix Test Suite v5.2.1 MB/s > Higher Is Better Intel Xeon E5-2666 v3 . 8060.40 |============================================== CacheBench Read Cache MB/s > Higher Is Better Intel Xeon E5-2666 v3 . 2705.15 |============================================== CacheBench Write Cache MB/s > Higher Is Better Intel Xeon E5-2666 v3 . 11808.12 |============================================= MBW 2018-09-08 Test: Memory Copy - Array Size: 1024 MiB MiB/s > Higher Is Better Intel Xeon E5-2666 v3 . 7849.15 |============================================== MBW 2018-09-08 Test: Memory Copy, Fixed Block Size - Array Size: 1024 MiB MiB/s > Higher Is Better Intel Xeon E5-2666 v3 . 4626.38 |==============================================