Newbie - Need to use shared mem?

[alex_dubinsky]

This is probably a stupid question, but what happens to variables you don’t manually copy to the GPU? In your kernel invocation, you pass the variables you already copied over to global mem, constant mem etc, but what about the parameters like matrix dimensions?

You can pass ordinary values (ie not pointers) and these get copied automatically. In fact, the value of pointers gets copied the same way. You can also pass structs by value (ie automatically), up to 256 bytes total.