The virtual box already when you set it up decide how many cores to give it and how much % of it to use, does it matter if you change affinities (Both processes of VirtualSVC and Virtualbox use affinity <ALL PROCESSORS>, which is weird considering I checked the virtual box to use 1 core)
And does priority, excluding Realtime have impact on virtualbox? And if yes, which processes priority should be changed (And which for affinity)