zfs_tuning Xen HVM domU 4.13 testing on Ubuntu 22.04 via the Phoronix Test Suite. atime on 128K blocks: Processor: AMD Ryzen 9 5900X 12-Core (8 Cores), Motherboard: Xen HVM domU v4.13, Chipset: Intel 440FX 82441FX PMC, Memory: 6GB, Disk: 29GB, Graphics: bochs-drmdrmfb OS: Ubuntu 22.04, Kernel: 5.15.0-67-generic (x86_64), Vulkan: 1.3.224, Compiler: GCC 11.3.0, File-System: ext4, Screen Resolution: 1024x768, System Layer: Xen HVM domU 4.13 Flexible IO Tester 3.29 Type: Random Read - Engine: Linux AIO - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory IOPS > Higher Is Better atime on 128K blocks . 1114 |================================================== Flexible IO Tester 3.29 Type: Random Read - Engine: Linux AIO - Buffered: No - Direct: No - Block Size: 4KB - Disk Target: Default Test Directory IOPS > Higher Is Better atime on 128K blocks . 79767 |================================================= Flexible IO Tester 3.29 Type: Random Write - Engine: Linux AIO - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory IOPS > Higher Is Better atime on 128K blocks . 932 |=================================================== Flexible IO Tester 3.29 Type: Random Write - Engine: Linux AIO - Buffered: No - Direct: No - Block Size: 4KB - Disk Target: Default Test Directory IOPS > Higher Is Better atime on 128K blocks . 49967 |================================================= Flexible IO Tester 3.29 Type: Random Read - Engine: Linux AIO - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory MB/s > Higher Is Better atime on 128K blocks . 1118 |================================================== Flexible IO Tester 3.29 Type: Random Read - Engine: Linux AIO - Buffered: No - Direct: No - Block Size: 4KB - Disk Target: Default Test Directory MB/s > Higher Is Better atime on 128K blocks . 312 |=================================================== Flexible IO Tester 3.29 Type: Random Write - Engine: Linux AIO - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory MB/s > Higher Is Better atime on 128K blocks . 935 |=================================================== Flexible IO Tester 3.29 Type: Random Write - Engine: Linux AIO - Buffered: No - Direct: No - Block Size: 4KB - Disk Target: Default Test Directory MB/s > Higher Is Better atime on 128K blocks . 195 |===================================================