GPU Memory Less Than Promised

[Robert_Crovella]

@njuffa

220KB,

I think it is 220MB.

6144x1024x1024 = 6,442,450,944
op reported:     6,225,002,496

Still I think 220MB would be fairly typical for a CUDA context creation, and the runtime probably creates a CUDA context for some of the APIs used to retrieve that info.