possible bug in pnetcdf: cdf5 issue

[Jim Edwards]

Found the problem in the test program, a corrected program is attached.
This reminds me of another issue - the interface to nfmpi_iput_vara is not
defined in pnetcdf.mod

- Jim

On Sun, Feb 17, 2013 at 11:43 AM, Jim Edwards <jedwards at ucar.edu> wrote:

> In my larger program I am getting an error:
>
> PMPI_Type_create_struct(139): Invalid value for blocklen, must be
> non-negative but is -1715470336
>
> I see a note about this in nonblocking.c:
>
>     for (j=0; j<reqs[i].varp->ndims; j++)
>                 blocklens[i] *= reqs[i].count[j];
>             /* Warning! blocklens[i] might overflow */
>
>
> But I tried to distile this into a small testcase and I'm getting a
> different error, I've attached the test program anyway because I can't spot
> any error there and think it must be in pnetcdf.    Also it seems like
> instead of
> calling mpi_type_create_struct you should be calling mpi_type_subarray
> which will avoid the problem of blocklens overflowing.
>
> This test program is written for 8 mpi tasks, but it uses a lot of memory
> so you may need more than one node to run it.
>
> --
> Jim Edwards
>
> CESM Software Engineering Group
> National Center for Atmospheric Research
> Boulder, CO
> 303-497-1842
>



-- 
Jim Edwards

CESM Software Engineering Group
National Center for Atmospheric Research
Boulder, CO
303-497-1842
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