Lost shared memory size Problem with maximum size

[shtv]

Hi!
I was searching everywhere (?) and haven’t found anywhere an answer. I lose 48 bytes from maximum of shared memory size (16384) if I add some arguments to kernel function. Is it normal?

[eyalhir74]

Hi!

I was searching everywhere (?) and haven’t found anywhere an answer. I lose 48 bytes from maximum of shared memory size (16384) if I add some arguments to kernel function. Is it normal?

Kernel parameters are passed via shared memory so its normal. Furthermore using the entire 16K is kinda bad practice, you can find

a lot of discussions about this in this forum :)

eyal

[shtv]

Thanks!

[wanderine]

Is it possible to use ALL the shared memory with Fermi?

[Nico]

I believe so, since fermi has compute capability 2.0. Section 5.2.3 of the programming guide:

The total amount of shared memory required for a block is equal to the sum of the

amount of statically allocated shared memory, the amount of dynamically allocated

shared memory, and for devices of compute capability 1.x, the amount of shared

memory used to pass the kernel‟s arguments (see Section B.1.4).

N.