On Wed, 7 Dec 2016 11:13:54 +0200 "Rana" ranaventures@gmail.com wrote:

But is it possible to tell Tor on which cores to run? I mean, install a 2nd instance of Tor and tell it to run on the two cores not used by the first instance?

The Linux kernel will sort it out automatically. Deciding optimally which programs get to run on which cores is the kernel's job.

It's also possible to pin programs to specific cores using "schedtool", but that's more of an advanced tuning trick: not something you should need as the first thing you do, but you could look into that if you get to the point when both of them use 100% CPU, and you want to micro-optimize things a bit further.