Check to see whether OpenGL rendering is GPU-accelerated on your linux or OSX host

check_gpu_opengl_render.md

Note that on some headless linux platforms you may need to install xfvb

On Debian/Armbian with no GPU acceleration:

$ glxinfo |grep renderer
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
    GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer, GLX_MESA_query_renderer, 
Extended renderer info (GLX_MESA_query_renderer):
OpenGL renderer string: llvmpipe (LLVM 7.0, 128 bits)
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
    GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer, GLX_MESA_query_renderer, 
Extended renderer info (GLX_MESA_query_renderer):
OpenGL renderer string: llvmpipe (LLVM 7.0, 128 bits)

• Note that llvmpipe is software renderer that does not utilize the GPU.

On OSX:

$ glxinfo |grep renderer
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
OpenGL renderer string: Intel HD Graphics 4000 OpenGL Engine