February 2013 - mpiwg-fortran - mailman3.cels.anl.gov

Re: [MPI3 Fortran] MPI_INIT issues
by N.M. Maclaren 20 Feb '13

20 Feb '13

On Feb 20 2013, Bill Long wrote: > >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. I wouldn't. I have used a couple of MPIs where the arguments got through to only the local (to mpiexec) or first process; I can't remember if I ever experimented where there was no local MPI process and such MPIs. On at least one, they didn't get through at all. If I can guess the issue, the usual solution is (in any language) to read the command arguments (or unpick environment variables) on process zero and broadcast them. If that doesn't get them, at least all processes get the same ones and some other kludge can be tried. That's really all that is needed. Regards, Nick Maclaren.

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Re: [MPI3 Fortran] MPI_INIT issues
by Jeff Squyres (jsquyres) 20 Feb '13

20 Feb '13

On Feb 20, 2013, at 1:05 PM, "N.M. Maclaren" <nmm1(a)cam.ac.uk> wrote: > On Feb 20 2013, 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. > > I get "Error: Not Found". Perhaps your mail client is including ) in the URL? -- Jeff Squyres jsquyres(a)cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/

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Re: [MPI3 Fortran] MPI_INIT issues
by N.M. Maclaren 20 Feb '13

20 Feb '13

On Feb 20 2013, 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. I get "Error: Not Found". Regards, Nick Maclaren.

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Re: [MPI3 Fortran] MPI_INIT issues
by Bill Long 20 Feb '13

20 Feb '13

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" <longb(a)cray.com> >> To: mpi3-fortran(a)lists.mpi-forum.org >> 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 longb(a)cray.com >> 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 >> >> >> _______________________________________________ >> mpi3-fortran mailing list >> mpi3-fortran(a)lists.mpi-forum.org >> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-fortran > -- Bill Long longb(a)cray.com 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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Re: [MPI3 Fortran] MPI_INIT issues
by Jeff Squyres (jsquyres) 20 Feb '13

20 Feb '13

This is a WG meeting, not a plenary. Rolf -- are you not going to be there? Because if I'm going to be the only WG member at the meeting, it'll be a pretty darn quick meeting. :-) On Feb 20, 2013, at 12:21 PM, Rolf Rabenseifner <rabenseifner(a)hlrs.de> 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" <longb(a)cray.com> >> To: mpi3-fortran(a)lists.mpi-forum.org >> 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 longb(a)cray.com >> 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 >> >> >> _______________________________________________ >> mpi3-fortran mailing list >> mpi3-fortran(a)lists.mpi-forum.org >> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-fortran > > -- > Dr. Rolf Rabenseifner . . . . . . . . . .. email rabenseifner(a)hlrs.de > High Performance Computing Center (HLRS) . phone ++49(0)711/685-65530 > University of Stuttgart . . . . . . . . .. fax ++49(0)711 / 685-65832 > Head of Dpmt Parallel Computing . . . www.hlrs.de/people/rabenseifner > Nobelstr. 19, D-70550 Stuttgart, Germany . . . . (Office: Room 1.307) > _______________________________________________ > mpi3-fortran mailing list > mpi3-fortran(a)lists.mpi-forum.org > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-fortran -- Jeff Squyres jsquyres(a)cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/

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Re: [MPI3 Fortran] MPI_INIT issues
by Rolf Rabenseifner 20 Feb '13

20 Feb '13

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" <longb(a)cray.com> > To: mpi3-fortran(a)lists.mpi-forum.org > 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 longb(a)cray.com > 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 > > > _______________________________________________ > mpi3-fortran mailing list > mpi3-fortran(a)lists.mpi-forum.org > http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-fortran -- Dr. Rolf Rabenseifner . . . . . . . . . .. email rabenseifner(a)hlrs.de High Performance Computing Center (HLRS) . phone ++49(0)711/685-65530 University of Stuttgart . . . . . . . . .. fax ++49(0)711 / 685-65832 Head of Dpmt Parallel Computing . . . www.hlrs.de/people/rabenseifner Nobelstr. 19, D-70550 Stuttgart, Germany . . . . (Office: Room 1.307)

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Re: [MPI3 Fortran] MPI_INIT issues
by Bill Long 20 Feb '13

20 Feb '13

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 longb(a)cray.com 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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[MPI3 Fortran] MPI_INIT issues
by Jeff Squyres (jsquyres) 20 Feb '13

20 Feb '13

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) -- Jeff Squyres jsquyres(a)cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/

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