This is Windows 10 with VirtualBox installed and Ubuntu virtual machine with Apache server.
Often CPU hangs on the Ubuntu virtual machine, taking up to 50% host CPU usage with no response at all, when nothing really is requested to work on. Once Ubuntu hangs, a hard restart of the virtual machine or saving the machine state and starting it will fix this.
The most common error that shows is like this:
watchdog BUG: soft lockup - CPU#0 stuck for 23s.
I tried to spot something using linux
top command with processes enlisted but for some reason when it hangs,
top stops on showing just a few percents of CPU usage with nothing really to blame.
Here are errors
VirtualBox v 6.1.34 Ubuntu v 22.04 LTS Windows 10 Pro v 21H2