qemu-writeback
KVM QEMU testing on Ubuntu 20.04 via the Phoronix Test Suite.


QEMU HDD: 

	Processor: QEMU Virtual 2.5+ (1 Core), Motherboard: QEMU Standard PC (Q35 + ICH9 2009) (0.0.0 BIOS), Chipset: Intel 82G33/G31/P35/P31 + ICH9, Memory: 4096MB, Disk: 43GB QEMU HDD + QEMU HDD, Network: 2 x Red Hat Virtio device

	OS: Ubuntu 20.04, Kernel: 5.4.0-47-generic (x86_64), File-System: ext4, System Layer: KVM QEMU


Flexible IO Tester 3.16
Type: Random Read - IO Engine: Sync - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 713 |===============================================================


Flexible IO Tester 3.16
Type: Random Read - IO Engine: Sync - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 686 |===============================================================


Flexible IO Tester 3.16
Type: Random Read - IO Engine: Sync - Buffered: Yes - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 378 |===============================================================


Flexible IO Tester 3.16
Type: Random Write - IO Engine: Sync - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 212 |===============================================================


Flexible IO Tester 3.16
Type: Random Read - IO Engine: Sync - Buffered: Yes - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 383 |===============================================================


Flexible IO Tester 3.16
Type: Random Write - IO Engine: Sync - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 211 |===============================================================


Flexible IO Tester 3.16
Type: Random Write - IO Engine: Sync - Buffered: Yes - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 235 |===============================================================


Flexible IO Tester 3.16
Type: Random Write - IO Engine: Sync - Buffered: Yes - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 224 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Read - IO Engine: Sync - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 713 |===============================================================


Flexible IO Tester 3.16
Type: Random Read - IO Engine: Linux AIO - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 636 |===============================================================


Flexible IO Tester 3.16
Type: Random Read - IO Engine: POSIX AIO - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 674 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Read - IO Engine: Sync - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 708 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Read - IO Engine: Sync - Buffered: Yes - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 594 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Write - IO Engine: Sync - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 199 |===============================================================


Flexible IO Tester 3.16
Type: Random Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 750 |===============================================================


Flexible IO Tester 3.16
Type: Random Read - IO Engine: Linux AIO - Buffered: Yes - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 362 |===============================================================


Flexible IO Tester 3.16
Type: Random Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 662 |===============================================================


Flexible IO Tester 3.16
Type: Random Read - IO Engine: POSIX AIO - Buffered: Yes - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 367 |===============================================================


Flexible IO Tester 3.16
Type: Random Write - IO Engine: Linux AIO - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 219 |===============================================================


Flexible IO Tester 3.16
Type: Random Write - IO Engine: POSIX AIO - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 192 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Read - IO Engine: Sync - Buffered: Yes - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 544 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Write - IO Engine: Sync - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 203 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Write - IO Engine: Sync - Buffered: Yes - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 209 |===============================================================


Flexible IO Tester 3.16
Type: Random Read - IO Engine: Linux AIO - Buffered: Yes - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 365 |===============================================================


Flexible IO Tester 3.16
Type: Random Read - IO Engine: POSIX AIO - Buffered: Yes - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 378 |===============================================================


Flexible IO Tester 3.16
Type: Random Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 223 |===============================================================


Flexible IO Tester 3.16
Type: Random Write - IO Engine: Linux AIO - Buffered: Yes - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 253 |===============================================================


Flexible IO Tester 3.16
Type: Random Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 215 |===============================================================


Flexible IO Tester 3.16
Type: Random Write - IO Engine: POSIX AIO - Buffered: Yes - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 224 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Write - IO Engine: Sync - Buffered: Yes - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 224 |===============================================================


Flexible IO Tester 3.16
Type: Random Write - IO Engine: Linux AIO - Buffered: Yes - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 221 |===============================================================


Flexible IO Tester 3.16
Type: Random Write - IO Engine: POSIX AIO - Buffered: Yes - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 230 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Read - IO Engine: Linux AIO - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 771 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Read - IO Engine: POSIX AIO - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 771 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 771 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Read - IO Engine: Linux AIO - Buffered: Yes - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 654 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Read - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 701 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Read - IO Engine: POSIX AIO - Buffered: Yes - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 595 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Write - IO Engine: Linux AIO - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 208 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Write - IO Engine: POSIX AIO - Buffered: No - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 207 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Read - IO Engine: Linux AIO - Buffered: Yes - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 565 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Read - IO Engine: POSIX AIO - Buffered: Yes - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 566 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 180.4 |=============================================================


Flexible IO Tester 3.16
Type: Sequential Write - IO Engine: Linux AIO - Buffered: Yes - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 132 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 150 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Write - IO Engine: POSIX AIO - Buffered: Yes - Direct: No - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 128 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Write - IO Engine: Linux AIO - Buffered: Yes - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 137 |===============================================================


Flexible IO Tester 3.16
Type: Sequential Write - IO Engine: POSIX AIO - Buffered: Yes - Direct: Yes - Block Size: 1MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
QEMU HDD . 133 |===============================================================