performance: 0.963
boot: 0.913
network: 0.876
device: 0.826
graphic: 0.652
vnc: 0.546
other: 0.488
semantic: 0.473
debug: 0.417
socket: 0.411
permissions: 0.390
PID: 0.301
files: 0.208
KVM: 0.127

Boot with OVMF extremely slow to bootloader

I have used Arch Linux in the past with the same version (2.5.0), the exact same OVMF code and vars, and the exact same VM settings with no issues. Now with Ubuntu, I am having the issue where boot up until Windows takes about 10x longer. Every CPU thread/core allocated gets used 100% while this is happening. After that, everything operates as normal. There is no abnormal logs produced by qemu, or I don't know how to debug.

Here are my settings:

Host:
Ubuntu 16.04
Qemu 2.5.0
Relevant configs attached

Guest:
Windows 10
VirtIO raw disk image
VirtIO network
Typical VGA passthrough setup, everything operating normally



I've solved the problem by using the ovmf package in apt instead of the firmware I've had before. Apparently, the older firmware was only compatible with an older kernel, and a newer kernel with the older firmware would cause the issue.