Since the host is KVM and issue is related to usleep(), can we check if tweaking the halt_poll_ns kvm module parameter in the host solves the problem
Check current default value:
root@virtual-machine:~$ cat /sys/module/kvm/parameters/halt_poll_ns
200000
Temporary change for testing
echo 10000 > /sys/module/kvm/parameters/halt_poll_ns
Permanent changes by modifications to kvm.conf
[root@localhost ~]# cat /etc/modprobe.d/kvm.conf
# Setting modprobe kvm_intel/kvm_amd nested = 1
# only enables Nested Virtualization until the next reboot or
# module reload. Uncomment the option applicable
# to your system below to enable the feature permanently.
#
# User changes in this file are preserved across upgrades.
#
# For Intel
#options kvm_intel nested=1
#
# For AMD
#options kvm_amd nested=1
options kvm halt_poll_ns=10000
References:
Bug #1724614 “[KVM] Lower the default for halt_poll_ns to 200000…” : Zesty (17.04) : Bugs : linux package : Ubuntu (launchpad.net)
The KVM halt polling system — The Linux Kernel documentation
KVM settings - IBM Documentation