ust a mistake.)
On Thu, Sep 8, 2011 at 4:17 PM, Greg Fischer wrote:
> I am seeing mpi_allreduce operations freeze execution of my code on some
> moderately-sized problems. The freeze does not manifest itself in every
> problem. In addition, it is in a portion of the code that is repeated man
I am seeing mpi_allreduce operations freeze execution of my code on some
moderately-sized problems. The freeze does not manifest itself in every
problem. In addition, it is in a portion of the code that is repeated many
times. In the problem discussed below, the problem appears in the 60th
itera
I'm seeing some sporadic strange behavior in one of our MPI codes. Here are
selected portions of the output:
---
| | |im |jm |km | phi0 | | iter | sync |mcalc ||
|grp|itn|loc|loc|loc|Max Error| NSR |t(s
It looks like the buffering operations consume about 15% as much time as the
allreduce operations. Not huge, but not trivial, all the same. Is there
any way to avoid the buffering step?
On Thu, Sep 24, 2009 at 6:03 PM, Eugene Loh wrote:
> Greg Fischer wrote:
>
> (I apologize in ad
(I apologize in advance for the simplistic/newbie question.)
I'm performing an ALLREDUCE operation on a multi-dimensional array. This
operation is the biggest bottleneck in the code, and I'm wondering if
there's a way to do it more efficiently than what I'm doing now. Here's a
representative exa
d see how the quoting might get screwed up and end up
> passing "Sep" (and following) as individual tokens rather than One Big Token
> (including quotes).
>
> That's just a first guess -- can you check to see if this is happening?
>
>
>
>
> On Sep 4, 2009, at 5
I'm attempting to compile OpenMPI version 1.3.3 with Intel C/C++/Fortran
version 11.1.046. Others have reported success using these compilers (
http://software.intel.com/en-us/forums/intel-c-compiler/topic/68111/). The
line where compilation fails is included at the end of this message. I have
a
are many well-documented problems
> because of the design of the MPI-2 Fortran 90 interface (which are currently
> being addressed in MPI-3, if you care :-) ). More generally: "use mpi" will
> catch *many* compile errors, but not *all* of them.
>
> But to answer your question succi
I'm receiving the error posted at the bottom of this message with a code
compiled with Intel Fortran/C Version 11.1 against OpenMPI version 1.3.2.
The same code works correctly when compiled against MPICH2. (We have
re-compiled with OpenMPI to take advantage of newly-installed Infiniband
hardware
Hello,
I'm attempting to wrap my brain around the MPI I/O mechanisms, and I was
hoping to find some guidance. I'm trying to read a file that contains a
117-character string, followed by a series records that contain integers and
reals. The following code would read it in serial:
---
character(l
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