Anyone who has been doing performance work should have known this. The tools to adjust things like core affinity and where interrupts are handled have been available in Linux and Windows for a long time. These effects were present in 1980s mainframes. DUH.
"Well, it don't make the sun shine, but at least it don't deepen the shit." -- Straiter Empy, in _Riddley_Walker_ by Russell Hoban