Re: [OMPI users] MPI_Allreduce on local machine

Hi Jeff Thank you for opening a ticket and taking care of this. Jeff Squyres wrote: On Jul 28, 2010, at 5:07 PM, Gus Correa wrote: Still, the alignment under Intel may or may not be right. And this may or may not explain the errors that Hugo has got. FYI, the ompi_info from my OpenMPI 1.3.2

Re: [OMPI users] MPI_Allreduce on local machine

On Jul 28, 2010, at 5:07 PM, Gus Correa wrote: > Still, the alignment under Intel may or may not be right. > And this may or may not explain the errors that Hugo has got. > > FYI, the ompi_info from my OpenMPI 1.3.2 and 1.2.8 > report exactly the same as OpenMPI 1.4.2, namely > Fort dbl prec

Re: [OMPI users] MPI_Allreduce on local machine

On Jul 28, 2010, at 12:21 PM, Åke Sandgren wrote: > > Jeff: Is this correct? > > This is wrong, it should be 8 and alignement should be 8 even for intel. > And i also see exactly the same thing. Good catch! I just fixed this in https://svn.open-mpi.org/trac/ompi/changeset/23580 -- it looks

Re: [OMPI users] MPI_Allreduce on local machine

I also get 8 from "call MPI_Type_size(MPI_DOUBLE_PRECISION, size, mpierr)", but really I don't think this is the issue anymore. I mean I checked on my school cluster where OpenMPI has also been compiled with the intel64 compilers and "Fort dbl prec size:" also returns 4 but unlike on my Mac the

Re: [OMPI users] MPI_Allreduce on local machine

Hi All Martin Siegert wrote: On Wed, Jul 28, 2010 at 01:05:52PM -0700, Martin Siegert wrote: On Wed, Jul 28, 2010 at 11:19:43AM -0400, Gus Correa wrote: Hugo Gagnon wrote: Hi Gus, Ompi_info --all lists its info regarding fortran right after C. In my case: Fort real size: 4

Re: [OMPI users] MPI_Allreduce on local machine

On Wed, Jul 28, 2010 at 01:05:52PM -0700, Martin Siegert wrote: > On Wed, Jul 28, 2010 at 11:19:43AM -0400, Gus Correa wrote: > > Hugo Gagnon wrote: > >> Hi Gus, > >> Ompi_info --all lists its info regarding fortran right after C. In my > >> case: > >> Fort real size: 4 > >>

Re: [OMPI users] MPI_Allreduce on local machine

On Wed, Jul 28, 2010 at 11:19:43AM -0400, Gus Correa wrote: > Hugo Gagnon wrote: >> Hi Gus, >> Ompi_info --all lists its info regarding fortran right after C. In my >> case: >> Fort real size: 4 >> Fort real4 size: 4 >> Fort real8 size: 8 >> Fort real16 size: 16

Re: [OMPI users] MPI_Allreduce on local machine

On Wed, 2010-07-28 at 11:48 -0400, Gus Correa wrote: > Hi Hugo, Jeff, list > > Hugo: I think David Zhang's suggestion was to use > MPI_REAL8 not MPI_REAL, instead of MPI_DOUBLE_PRECISION in your > MPI_Allreduce call. > > Still, to me it looks like OpenMPI is making double precision 4-byte >

Re: [OMPI users] MPI_Allreduce on local machine

Here they are. -- Hugo Gagnon On Wed, 28 Jul 2010 12:01 -0400, "Jeff Squyres" wrote: > On Jul 28, 2010, at 11:55 AM, Gus Correa wrote: > > > I surely can send you the logs, but they're big. > > Off the list perhaps? > > If they're still big when compressed, sure, send

Re: [OMPI users] MPI_Allreduce on local machine

Hi Jeff I surely can send you the logs, but they're big. Off the list perhaps? Thanks, Gus Jeff Squyres wrote: On Jul 28, 2010, at 11:19 AM, Gus Correa wrote: Ompi_info --all lists its info regarding fortran right after C. In my Ummm right... I should know that. I wrote ompi_info,

Re: [OMPI users] MPI_Allreduce on local machine

Hi Hugo, Jeff, list Hugo: I think David Zhang's suggestion was to use MPI_REAL8 not MPI_REAL, instead of MPI_DOUBLE_PRECISION in your MPI_Allreduce call. Still, to me it looks like OpenMPI is making double precision 4-byte long, which shorter than I expected it be (8 bytes), at least when

Re: [OMPI users] MPI_Allreduce on local machine

Hugo Gagnon wrote: Hi Gus, Ompi_info --all lists its info regarding fortran right after C. In my case: Fort real size: 4 Fort real4 size: 4 Fort real8 size: 8 Fort real16 size: 16 Fort dbl prec size: 4 Does it make any sense to you? Hi Hugo No, dbl

Re: [OMPI users] MPI_Allreduce on local machine

I mean to write: call mpi_allreduce(inside, outside, 5,mpi_real, mpi_double_precision, mpi_comm_world, ierr) -- Hugo Gagnon On Wed, 28 Jul 2010 09:33 -0400, "Hugo Gagnon" wrote: > And how do I know how big my data buffer is? I ran MPI_TYPE_EXTENT of >

Re: [OMPI users] MPI_Allreduce on local machine

I installed with: ./configure --prefix=/opt/openmpi CC=icc CXX=icpc F77=ifort FC=ifort make all install I would gladly give you a corefile but I have no idea on to produce one, I'm just an end user... -- Hugo Gagnon On Wed, 28 Jul 2010 08:57 -0400, "Jeff Squyres" wrote:

Re: [OMPI users] MPI_Allreduce on local machine

And how do I know how big my data buffer is? I ran MPI_TYPE_EXTENT of And how do I know how big my data buffer is? I ran MPI_TYPE_EXTENT of MPI_DOUBLE_PRECISION and the result was 8. So I changed my program to: 1 program test 2 3 use mpi 4 5 implicit none 6 7

Re: [OMPI users] MPI_Allreduce on local machine

I don't have the intel compilers on my Mac, but I'm unable to replicate this issue on Linux with the intel compilers v11.0. Can you get a corefile to see a backtrace where it died in Open MPI's allreduce? How exactly did you configure your Open MPI, and how exactly did you compile / run your

Re: [OMPI users] MPI_Allreduce on local machine

On Jul 27, 2010, at 11:21 AM, Hugo Gagnon wrote: > I appreciate your replies but my question has to do with the function > MPI_Allreduce of OpenMPI built on a Mac OSX 10.6 with ifort (intel > fortran compiler). The implication I was going for was that if you were using MPI_DOUBLE_PRECISION with

Re: [OMPI users] MPI_Allreduce on local machine

On Tue, 2010-07-27 at 16:19 -0400, Gus Correa wrote: > Hi Hugo, David, Jeff, Terry, Anton, list > > I suppose maybe we're guessing that somehow on Hugo's iMac > MPI_DOUBLE_PRECISION may not have as many bytes as dp = kind(1.d0), > hence the segmentation fault on MPI_Allreduce. > > Question: >

Re: [OMPI users] MPI_Allreduce on local machine

I did and it runs now, but the result is wrong: outside is still 1.d0, 2.d0, 3.d0, 4.d0, 5.d0 How can I make sure to compile OpenMPI so that datatypes such as mpi_double_precision behave as they "should"? Are there flags during the OpenMPI building process or something? Thanks, -- Hugo Gagnon

Re: [OMPI users] MPI_Allreduce on local machine

Hi Hugo, David, Jeff, Terry, Anton, list I suppose maybe we're guessing that somehow on Hugo's iMac MPI_DOUBLE_PRECISION may not have as many bytes as dp = kind(1.d0), hence the segmentation fault on MPI_Allreduce. Question: Is there a simple way to check the number of bytes associated to

Re: [OMPI users] MPI_Allreduce on local machine

Try mpi_real8 for the type in allreduce On 7/26/10, Hugo Gagnon wrote: > Hello, > > When I compile and run this code snippet: > > 1 program test > 2 > 3 use mpi > 4 > 5 implicit none > 6 > 7 integer :: ierr, nproc,

Re: [OMPI users] MPI_Allreduce on local machine

On Tue, Jul 27, 2010 at 08:11:39AM -0400, Jeff Squyres wrote: > On Jul 26, 2010, at 11:06 PM, Hugo Gagnon wrote: > > > 8 integer, parameter :: dp = kind(1.d0) > > 9 real(kind=dp) :: inside(5), outside(5) > > I'm not a fortran expert -- is kind(1.d0) really double precision?

Re: [OMPI users] MPI_Allreduce on local machine

On Tue, 2010-07-27 at 08:11 -0400, Jeff Squyres wrote: > On Jul 26, 2010, at 11:06 PM, Hugo Gagnon wrote: > > > 8 integer, parameter :: dp = kind(1.d0) > > 9 real(kind=dp) :: inside(5), outside(5) > > I'm not a fortran expert -- is kind(1.d0) really double precision?