It looks like haveged helps a lot:

Before installing haveged:
ubuntu@groucho:~$ cat /proc/sys/kernel/random/entropy_avail
79
After:
ubuntu@groucho:~$ cat /proc/sys/kernel/random/entropy_avail
2424

The getrandom tests will finish in the blink of an eye.

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https://bugs.launchpad.net/bugs/1831229

Title:
  getrandom02 from ubuntu_ltp_syscalls failed with timeout multiplier =
  3 on D-KVM

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