Install reqs:

apt install gcc fakeroot build-essential debhelper pve-headers rsync git dkms

Clone repo:

git clone https://github.com/RemixVSL/iomemory-vsl

You'll probably have to reboot at this point.

cd to the cloned repo, build:

sudo make dkms

Clone utilities repo

https://github.com/RemixVSL/vsl_downloads/tree/main

Install fio-utils

sudo dpkg -i ~/vsl_downloads/vsl3/fio-util_3.2.16.1731-1.0_amd64.deb

Reboot again to enable dkms modules.