OS & Low-Latency Kernel

Headless Ubuntu discipline, PREEMPT, HugePages, GRUB tuning.

Headless Discipline

sudo systemctl set-default multi-user.target
systemctl list-unit-files | grep -E 'gdm|lightdm|sddm' || true

Low-Latency Kernel Essentials

# /etc/default/grub (append)
intel_iommu=on iommu=pt default_hugepagesz=1G hugepagesz=1G hugepages=64 isolcpus=managed:2-63,66-127 nohz_full=2-63,66-127 rcu_nocbs=2-63,66-127 systemd.unified_cgroup_hierarchy=1

sudo update-grub && sudo reboot