Declaring pinned memory

Accelerated Computing HPC Compilers Legacy PGI Compilers
1

As I get used to CUDA Fortran, I have a simple question about syntax. Does pinned memory have to be allocatable? That is are:

real, pinned :: ta(m,np)

and

real, allocatable, pinned :: ta(:,:)
allocate(ta(m,np))

equivalent? Or do you need the explicit allocate to use pinned memory? (Note: I understand the latter is probably better, no matter what, since you can use the PINNED keyword with it.)

2

Hi Matt,

Pinned is only effective with allocatables. It’s ignored otherwise.

Note that I put in a request last week to have a warning emitted when using the pinned attribute on a non-allocatable.

  • Mat