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device: 0.876
graphic: 0.863
instruction: 0.771
network: 0.736
socket: 0.729
assembly: 0.726
boot: 0.717
mistranslation: 0.700
other: 0.541
semantic: 0.541
KVM: 0.498
vnc: 0.497
Slow random performance of virtio-blk
Steps to reproduce:
1. Download Virtualbox Windows 11 image from https://developer.microsoft.com/en-us/windows/downloads/virtual-machines/
2. Download virtio-win-iso: `wget https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/archive-virtio/virtio-win-0.1.215-2/virtio-win-0.1.215.iso`
3. Extract WinDev*.zip `unzip WinDev2204Eval.VirtualBox.zip`and import the extracted Ova in VirtualBox (import WinDev with the option "conversion to vdi" clicked)
4. `qemu-img convert -f vdi -O raw <YourVirtualBoxVMFolder>/WinDev2204Eval-disk001.vdi<YourQemuImgFolder>/WinDev2204Eval-disk001.img`
5. Start Windows 11 in Qemu:
```
qemu-system-x86_64 -enable-kvm -cpu host -device virtio-blk-pci,scsi=off,drive=WinDevDrive,id=virtio-disk0,bootindex=0 -drive file=<YourQemuImgFolder>/WinDev2204Eval-disk001.img,if=none,id=WinDevDrive,format=raw -net nic -net user,hostname=windowsvm -m 8G -monitor stdio -name "Windows" -usbdevice tablet -device virtio-serial -chardev spicevmc,id=vdagent,name=vdagent -device virtserialport,chardev=vdagent,name=com.redhat.spice.0 -cdrom <YourDownloadFolder>/virtio-win-0.1.215.iso
```
6. Win 11 won't boot and will go into recovery mode (even the safeboot trick doesn't work here), please follow that [answer](https://superuser.com/questions/1057959/windows-10-in-kvm-change-boot-disk-to-virtio#answer-1200899) to load the viostor driver over recovery cmd
7. Reboot the VM and it should start
2. Install CrystalDiskMark
3. Execute CrystalDiskMark Benchmark
Additional information:
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