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Subject: Re: [OMPI users] bug in MPI_Cart_create?
From: Kiril Dichev (dichev_at_[hidden])
Date: 2009-10-26 06:40:24


Hi David,

I believe this particular bug was fixed in the trunk some weeks ago
shortly before your post.

Regards,
Kiril

On Tue, 2009-10-13 at 17:54 +1100, David Singleton wrote:
> Looking back through the archives, a lot of people have hit error
> messages like
>
> > [bl302:26556] *** An error occurred in MPI_Cart_create
> > [bl302:26556] *** on communicator MPI_COMM_WORLD
> > [bl302:26556] *** MPI_ERR_ARG: invalid argument of some other kind
> > [bl302:26556] *** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)
>
> One of the reasons people *may* be hitting this is what I believe to
> be an incorrect test in MPI_Cart_create():
>
> if (0 > reorder || 1 < reorder) {
> return OMPI_ERRHANDLER_INVOKE (old_comm, MPI_ERR_ARG,
> FUNC_NAME);
> }
>
> reorder is a "logical" argument and "2.5.2 C bindings" in the MPI 1.3
> standard says:
>
> Logical flags are integers with value 0 meaning “false” and a
> non-zero value meaning “true.”
>
> So I'm not sure there should be any argument test.
>
>
> We hit this because we (sorta erroneously) were trying to use a GNU build
> of Open MPI with Intel compilers. gfortran has true=1 while ifort has
> true=-1. It seems to all work (by luck, I know) except this test. Are
> there any other tests like this in Open MPI?
>
> David
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-- 
Dipl.-Inf. Kiril Dichev
Tel.: +49 711 685 60492
E-mail: dichev_at_[hidden]
High Performance Computing Center Stuttgart (HLRS)
Universität Stuttgart
70550 Stuttgart
Germany