performance: 0.181
boot: 0.171
network: 0.115
device: 0.099
semantic: 0.085
other: 0.076
debug: 0.060
graphic: 0.045
vnc: 0.043
PID: 0.035
socket: 0.027
files: 0.025
permissions: 0.024
KVM: 0.013
boot: 0.856
performance: 0.107
debug: 0.012
other: 0.004
device: 0.004
PID: 0.004
files: 0.003
KVM: 0.003
socket: 0.002
network: 0.001
semantic: 0.001
graphic: 0.001
vnc: 0.001
permissions: 0.001

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.