Well, the descriptions of these routines has a lot of "processor-dependent" noise because the method for executing a program could be "unexpected". However, the normal, unix-like command line should behave normally. In F08, essentially all programs are assumed parallel, so I don't see the argument for serial only.

cat commd.f90 program test integer :: nargs,i,rank character(100) :: arg

me = this_image()-1 nargs = command_argument_count() call get_command_argument (0,arg) print *, "Rank ",me," command name = ",trim(arg) do i=1,nargs call get_command_argument (i,arg) print *, "Rank ",me," arg ", i," = ",trim(arg) end do end program test

ftn commd.f90 aprun -n4 ./a.out arg1 arg2 Rank 1 command name = ./a.out Rank 1 arg 1 = arg1 Rank 1 arg 2 = arg2 Rank 0 command name = ./a.out Rank 2 command name = ./a.out Rank 3 command name = ./a.out Rank 2 arg 1 = arg1 Rank 0 arg 1 = arg1 Rank 2 arg 2 = arg2 Rank 0 arg 2 = arg2 Rank 3 arg 1 = arg1 Rank 3 arg 2 = arg2 Application 10969216 resources: utime ~0s, stime ~2s

I would expect the same output whether the parallelism was native or MPI. So, it seems like it might be a solution in search of a problem. Cheers, Bill On 2/20/13 11:21 AM, Rolf Rabenseifner wrote:

As fas as I see, the MPI routines guarantee to work on all MPI processes, whereas the Fortran routines are guaranteed only in a sequential program.

If you are doing slides, then please show the Fortran routine functionality (e.g., the INOUT quality of a length argument) and compare it to the proposed MPI routine. They should be identical (i.e. least surprise). This would help the audience to see that the interface is okay.

Best regards Rolf

----- Original Message -----

...

From: "Bill Long" <[email protected]> To: [email protected] Sent: Wednesday, February 20, 2013 6:17:46 PM Subject: Re: [MPI3 Fortran] MPI_INIT issues I found the proposed solution confusing. If the Fortran user wants to call COMMAND_ARGUMENT_COUNT or GET_COMMAND_ARGUMENT, why not just do that directly? I don't see a point to creating new functions starting with MPI_ .

Cheers, Bill

On 2/20/13 11:02 AM, Jeff Squyres (jsquyres) wrote:

...

I see that Martin put us on the agenda to discuss the MPI_INIT Fortran issues (see https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/351): 9-10am US Central on Tuesday morning.

Do we have any slides to discuss, or a plan, or ...?

Who will be there? (I will)

-- Bill Long [email protected] Fortran Technical Support & voice: 651-605-9024 Bioinformatics Software Development fax: 651-605-9142 Cray Inc./Cray Plaza, Suite 210/380 Jackson St./St. Paul, MN 55101

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-- Bill Long [email protected] Fortran Technical Support & voice: 651-605-9024 Bioinformatics Software Development fax: 651-605-9142 Cray Inc./Cray Plaza, Suite 210/380 Jackson St./St. Paul, MN 55101