A suggestion of rhino cycle

Can send the using cpu cores number, or may be send -1, -2 of many cores -1, -2 cores, for Rhino to run

You can set the number of threads to use with RhinoCycles_SetThreads. The defaults is two less than number of cores, with a minimum of 1. This is an application wide setting for RhinoCycles (Raytraced), and persists between Rhino sessions.

Is it to set the cpu only, not apply on gpu? Thank you!:grinning:

There aren’t threads on the GPU. There Cycles will utilize as fully as possible.