The CPU usage in that process must be due to the server itself.
Are you running a lot of intensive plugins? A constant 100% usage with basically nothing else running is unusual on a CS 1.6 server.
Nope, that HLDS is very bare, its a regular pub with no special plugins, no amx_super stuff, just the normal plugins, regular admin commands. amx, metamod, stuff. Even smoke nades are blocked if that matters.
the zombie hlds has a lot of extra plugins but i have it offline right now, untill this issue can be resolved.