Graphics.Rendering.OpenGL.Raw.SGIX.Instruments
glGetSGIXInstruments
gl_SGIX_instruments
gl_INSTRUMENT_BUFFER_POINTER_SGIX
gl_INSTRUMENT_MEASUREMENTS_SGIX
glGetInstrumentsSGIX
glInstrumentsBufferSGIX
glPollInstrumentsSGIX
glReadInstrumentsSGIX
glStartInstrumentsSGIX
glStopInstrumentsSGIX