More Optimisations

Substantial benefits were gained by utilising the hardware interrupt mitigation provided by the e1000 driver, increasing the size of the network buffers and issuing multiple non-blocking reads at each return from select.

Using SCHED_FIFO on SMP machines, and disabling HyperThreading to keep the CPU caches “hot”.

In the end, we had a Linux-based LNS which could handle the initial number of sessions expected...