Pavan Balaji <[email protected]> writes:

Hi Jed,

You should use MPI_COMM_CREATE_KEYVAL and MPI_COMM_GET_ATTR. KEYVAL_CREATE and ATTR_GET are deprecated.

I used the MPI-1 terminology because our code maintains compatibility (mostly because old MVAPICH is common on RHEL systems).

I'm not sure I understand the program. If the comm is invalidated before the delete_fn is called, this is erroneous.

Yes, with MS-MPI, the comm passed to delete_fn is invalid, as evidenced by MPI_Attr_get failing.

But if it is invalidated after the delete_fn is called, this is valid. So what exactly are you trying to do?

We just wanted to call MPI_Attr_get inside the delete_fn. This test is just a minimal test case for that.