disktest KVM testing on Ubuntu 16.04 via the Phoronix Test Suite. disktest-1: Processor: Intel Xeon E5-2682 v4 @ 2.49GHz (1 Core), Motherboard: Alibaba Cloud ECS, Chipset: Intel 440FX- 82441FX PMC, Memory: 1 x 2048 MB RAM, Disk: 40GB, Graphics: Cirrus Logic GD 5446, Network: Red Hat Virtio device OS: Ubuntu 16.04, Kernel: 4.4.0-85-generic (x86_64), Compiler: GCC 5.4.0 20160609, File-System: ext4, Screen Resolution: 1024x768, System Layer: KVM disktest-2: Processor: Intel Xeon E5-2682 v4 @ 2.49GHz (1 Core), Motherboard: Alibaba Cloud ECS, Chipset: Intel 440FX- 82441FX PMC, Memory: 1 x 2048 MB RAM, Disk: 40GB, Graphics: Cirrus Logic GD 5446, Network: Red Hat Virtio device OS: Ubuntu 16.04, Kernel: 4.4.0-85-generic (x86_64), Compiler: GCC 5.4.0 20160609, File-System: ext4, Screen Resolution: 1024x768, System Layer: KVM Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: Sync - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory IOPS > Higher Is Better disktest-1 . 53 |============================================================== Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: Sync - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory IOPS > Higher Is Better disktest-1 . 1239 |============================================================ Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory IOPS > Higher Is Better disktest-1 . 51 |============================================================== Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory IOPS > Higher Is Better disktest-1 . 4524 |============================================================ Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory IOPS > Higher Is Better disktest-1 . 51 |============================================================== Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory IOPS > Higher Is Better disktest-1 . 1236 |============================================================ disktest-2 . 1238 |============================================================ Flexible IO Tester 2.1.13 Type: Random Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory IOPS > Higher Is Better disktest-2 . 1240 |============================================================ Flexible IO Tester 2.1.13 Type: Random Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Default Test Directory IOPS > Higher Is Better disktest-2 . 858 |============================================================= Flexible IO Tester 2.1.13 Type: Random Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory IOPS > Higher Is Better disktest-2 . 1237 |============================================================ Flexible IO Tester 2.1.13 Type: Random Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Default Test Directory IOPS > Higher Is Better disktest-2 . 781 |============================================================= Flexible IO Tester 2.1.13 Type: Sequential Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory IOPS > Higher Is Better disktest-2 . 1241 |============================================================ Flexible IO Tester 2.1.13 Type: Sequential Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Default Test Directory IOPS > Higher Is Better disktest-2 . 863 |============================================================= Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Default Test Directory IOPS > Higher Is Better disktest-2 . 788 |============================================================= Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: Sync - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory MB/s > Higher Is Better disktest-1 . 54.52 |=========================================================== Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: Sync - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory MB/s > Higher Is Better disktest-1 . 4.96 |============================================================ Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory MB/s > Higher Is Better disktest-1 . 55.23 |=========================================================== Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory MB/s > Higher Is Better disktest-1 . 18.11 |=========================================================== Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory MB/s > Higher Is Better disktest-1 . 56.23 |=========================================================== Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory MB/s > Higher Is Better disktest-1 . 4.96 |============================================================ disktest-2 . 4.96 |============================================================ Flexible IO Tester 2.1.13 Type: Random Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory MB/s > Higher Is Better disktest-2 . 4.98 |============================================================ Flexible IO Tester 2.1.13 Type: Random Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Default Test Directory MB/s > Higher Is Better disktest-2 . 55.15 |=========================================================== Flexible IO Tester 2.1.13 Type: Random Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory MB/s > Higher Is Better disktest-2 . 4.96 |============================================================ Flexible IO Tester 2.1.13 Type: Random Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Default Test Directory MB/s > Higher Is Better disktest-2 . 50.19 |=========================================================== Flexible IO Tester 2.1.13 Type: Sequential Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory MB/s > Higher Is Better disktest-2 . 4.98 |============================================================ Flexible IO Tester 2.1.13 Type: Sequential Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Default Test Directory MB/s > Higher Is Better disktest-2 . 55.45 |=========================================================== Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Default Test Directory MB/s > Higher Is Better disktest-2 . 50.67 |===========================================================