Am 22.04.2014 13:57, schrieb Matthew Knepley:
On Tue, Apr 22, 2014 at 6:48 AM, Niklas Fischer <[email protected]
<mailto:[email protected]>> wrote:
Am 22.04.2014 13:08, schrieb Jed Brown:
Niklas Fischer <[email protected]
<mailto:[email protected]>> writes:
Hello,
I have attached a small test case for a problem I am
experiencing. What
this dummy program does is it reads a vector and a matrix
from a text
file and then solves Ax=b. The same data is available in
two forms:
- everything is in one file (matops.s.0 and vops.s.0)
- the matrix and vector are split between processes
(matops.0,
matops.1, vops.0, vops.1)
The serial version of the program works perfectly fine but
unfortunately
errors occure, when running the parallel version:
make && mpirun -n 2 a.out matops vops
mpic++ -DPETSC_CLANGUAGE_CXX -isystem
/home/data/fischer/libs/petsc-3.4.3/arch-linux2-c-debug/include
-isystem
/home/data/fischer/libs/petsc-3.4.3/include petsctest.cpp
-Werror -Wall
-Wpedantic -std=c++11 -L
/home/data/fischer/libs/petsc-3.4.3/arch-linux2-c-debug/lib -lpetsc
/usr/bin/ld: warning: libmpi_cxx.so.0, needed by
/home/data/fischer/libs/petsc-3.4.3/arch-linux2-c-debug/lib/libpetsc.so,
may conflict with libmpi_cxx.so.1
/usr/bin/ld: warning: libmpi.so.0, needed by
/home/data/fischer/libs/petsc-3.4.3/arch-linux2-c-debug/lib/libpetsc.so,
may conflict with libmpi.so.1
librdmacm: couldn't read ABI version.
librdmacm: assuming: 4
CMA: unable to get RDMA device list
--------------------------------------------------------------------------
[[43019,1],0]: A high-performance Open MPI point-to-point
messaging module
was unable to find any relevant network interfaces:
Module: OpenFabrics (openib)
Host: dornroeschen.igpm.rwth-aachen.de
<http://dornroeschen.igpm.rwth-aachen.de>
CMA: unable to get RDMA device list
It looks like your MPI is either broken or some of the code
linked into
your application was compiled with a different MPI or
different version.
Make sure you can compile and run simple MPI programs in parallel.
Hello Jed,
thank you for your inputs. Unfortunately MPI does not seem to be
the issue here. The attachment contains a simple MPI hello world
program which runs flawlessly (I will append the output to this
mail) and I have not encountered any problems with other MPI
programs. My question still stands.
This is a simple error. You created the matrix A using
PETSC_COMM_WORLD, but you try to view it
using PETSC_VIEWER_STDOUT_SELF. You need to use
PETSC_VIEWER_STDOUT_WORLD in
order to match.
Thanks,
Matt
Greetings,
Niklas Fischer
mpirun -np 2 ./mpitest
librdmacm: couldn't read ABI version.
librdmacm: assuming: 4
CMA: unable to get RDMA device list
--------------------------------------------------------------------------
[[44086,1],0]: A high-performance Open MPI point-to-point
messaging module
was unable to find any relevant network interfaces:
Module: OpenFabrics (openib)
Host: dornroeschen.igpm.rwth-aachen.de
<http://dornroeschen.igpm.rwth-aachen.de>
Another transport will be used instead, although this may result in
lower performance.
--------------------------------------------------------------------------
librdmacm: couldn't read ABI version.
librdmacm: assuming: 4
CMA: unable to get RDMA device list
Hello world from processor dornroeschen.igpm.rwth-aachen.de
<http://dornroeschen.igpm.rwth-aachen.de>, rank 0 out of 2 processors
Hello world from processor dornroeschen.igpm.rwth-aachen.de
<http://dornroeschen.igpm.rwth-aachen.de>, rank 1 out of 2 processors
[dornroeschen.igpm.rwth-aachen.de:128141
<http://dornroeschen.igpm.rwth-aachen.de:128141>] 1 more process
has sent help message help-mpi-btl-base.txt / btl:no-nics
[dornroeschen.igpm.rwth-aachen.de:128141
<http://dornroeschen.igpm.rwth-aachen.de:128141>] Set MCA
parameter "orte_base_help_aggregate" to 0 to see all help / error
messages
Thank you, Matthew, this solves my viewing problem. Am I doing something
wrong when initializing the matrices as well? The matrix' viewing output
starts with "Matrix Object: 1 MPI processes" and the Krylov solver does
not converge.
Your help is really appreciated,
Niklas Fischer
--
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which
their experiments lead.
-- Norbert Wiener
