Hosting multiple servers on 1 pc?

For windows a program called Nuestart works pretty well unsure if u can find it anymore makes setting affinities and threads easy, for linux even more simple as just adding a crontab and running the srcds from 2 individual crontab commands or alter linuxgsm, lots of very easy and obvious ways if u use linux specially limiting the threads, The game runs phenomenally well on a single thread i've ran 7 80 slot servers and webserver on a i7 2700k in the past.