On Wed, Sep 11, 2013, at 13:24, Jeff Squyres (jsquyres) wrote:
> On Sep 11, 2013, at 7:22 PM, Hugo Gagnon
> wrote:
>
> >> This is definitely a puzzle, because I just installed gcc 4.8.1 on my
> >> 10.8.4 OS X MBP,
> >
> > I also just recompiled gcc 4.8.1_3 from MacPorts, and will recompile
> > o
On Sep 11, 2013, at 7:22 PM, Hugo Gagnon
wrote:
>> This is definitely a puzzle, because I just installed gcc 4.8.1 on my
>> 10.8.4 OS X MBP,
>
> I also just recompiled gcc 4.8.1_3 from MacPorts, and will recompile
> openmpi 1.6.5 myself rather than using MacPorts' version. May I ask
> what are
On Wed, Sep 11, 2013, at 12:26, Jeff Squyres (jsquyres) wrote:
> On Sep 10, 2013, at 2:33 PM, Hugo Gagnon
> wrote:
>
> > I only get the correct output when I use the more "conventional" syntax:
> >
> > ...
> > call MPI_Allreduce(a_loc,a,2,MPI_INTEGER,MPI_SUM,MPI_COMM_WORLD,ierr)
> > ...
>
> Wha
On Sep 10, 2013, at 2:33 PM, Hugo Gagnon
wrote:
> I only get the correct output when I use the more "conventional" syntax:
>
> ...
> call MPI_Allreduce(a_loc,a,2,MPI_INTEGER,MPI_SUM,MPI_COMM_WORLD,ierr)
> ...
What is a_loc? I'm assuming you know it can't be the same buffer as a.
> However, I
I only get the correct output when I use the more "conventional" syntax:
...
call MPI_Allreduce(a_loc,a,2,MPI_INTEGER,MPI_SUM,MPI_COMM_WORLD,ierr)
...
However, I get the wrong output when I use MPI_IN_PLACE:
...
MPI_Allreduce(MPI_IN_PLACE,a,2,MPI_INTEGER,MPI_SUM,MPI_COMM_WORLD,ierr)
...
hence m
On Sep 7, 2013, at 5:14 AM, Hugo Gagnon
wrote:
> $ openmpif90 test.f90
> $ openmpirun -np 2 a.out
> 0 4 6
> 1 4 6
>
> Now I'd be curious to know why your OpenMPI implementation handles
> MPI_IN_PLACE correctly and not mine!
I don't un
What Fortran compiler is your OpenMPI build with? Some fortran's don't
understand MPI_IN_PLACE. Do a 'fortran MPI_IN_PLACE' search to see
several instances.
T. Rosmond
On Sat, 2013-09-07 at 10:16 -0400, Hugo Gagnon wrote:
> Nope, no luck. My environment is:
>
> OpenMPI 1.6.5
> gcc 4.8.1
> M
Nope, no luck. My environment is:
OpenMPI 1.6.5
gcc 4.8.1
Mac OS 10.8
I found a ticket reporting a similar problem on OS X:
https://svn.open-mpi.org/trac/ompi/ticket/1982
It said to make sure $prefix/share/ompi/mpif90-wrapper-data.txt had the
following line:
compiler_flags=-Wl,-commons,use_dy
Just as an experiment, try replacing
use mpi
with
include 'mpif.h'
If that fixes the problem, you can confront the OpenMPI experts
T. Rosmond
On Fri, 2013-09-06 at 23:14 -0400, Hugo Gagnon wrote:
> Thanks for the input but it still doesn't work for me... Here's the
> version without MPI
I'm afraid I can't answer that. Here's my environment:
OpenMPI 1.6.1
IFORT 12.0.3.174
Scientific Linux 6.4
What fortran compiler are you using?
T. Rosmond
On Fri, 2013-09-06 at 23:14 -0400, Hugo Gagnon wrote:
> Thanks for the input but it still doesn't work for me... Here's the
> ver
Thanks for the input but it still doesn't work for me... Here's the
version without MPI_IN_PLACE that does work:
program test
use mpi
integer :: ierr, myrank, a(2), a_loc(2) = 0
call MPI_Init(ierr)
call MPI_Comm_rank(MPI_COMM_WORLD,myrank,ierr)
if (myrank == 0) then
a_loc(1) = 1
a_loc(2) = 2
Hello,
Your syntax defining 'a' is not correct. This code works correctly.
program test
use mpi
integer :: ierr, myrank, a(2) = 0
call MPI_Init(ierr)
call MPI_Comm_rank(MPI_COMM_WORLD,myrank,ierr)
if (myrank == 0) then
a(1) = 1
a(2) = 2
else
a(1) = 3
a(2) = 4
endif
call
MPI_Allreduce(MPI_IN_
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