Some of these patches should not be used, you have been warned.
Boot params for best latency:
nohz_full=1,2,3 rcu_nocbs=1,2,3 isolcpus=1,2,3 idle=poll
For a good mix of latency and system performance:
nohz_full=1,2,3 rcu_nocbs=1,2,3 idle=poll
Leaving isolcpus off allows you to use all 4 cores for non-RT tasks.
Adding pci=nocrs might be a good idea from now on.