No self-respecting post onHow to Maximise CPU Performance for the Oracle Database on Linuxwould be complete without also mentioningHyper-Threading(HT). This page describes HT perfectly as a feature that “uses processor resources more efficiently, enabling multiple threads to run on each core.” ...
It's clear that it's for Xeon CPUs and the GitHub page mentions that SDSi "allows the configuration of additional CPU features through a license activation process." There's very little to go by beyond this, but it's not hard to draw parallels with Intel's Upgrade Service from last ...