That looks like an error message from OpenMPI's mpiexec. That is surely part of the problem here. Do you have an OpenMPI installation somewhere that may be conflicting with your MPICH? One solution would be to make sure that the path to MPICH's mpiexec is first in your environment. Ken On 09/09/2014 05:31 PM, Sophie Norman wrote:
Hi Ken
When I run that code I get the following error
-------------------------------------------------------------------------- mpiexec was unable to launch the specified application as it could not find an executable:
Executable: -l Node: raspberrypi
while attempting to start process rank 0. --------------------------------------------------------------------------
Sophie
On 9 September 2014 02:07, Kenneth Raffenetti <[email protected] <mailto:[email protected]>> wrote:
Let's try to verify that the library is properly located on all the nodes you are running. We can do a simple test with mpiexec. Try running:
mpiexec -n 4 -machinefile /home/pi/mpi_testing/____machinefile -l ls /home/rpimpi/mpich3-install/__lib/libmpi.so.12
Ken
On 09/08/2014 07:03 PM, Sophie Norman wrote:
Hi Ken, Yes I used mpicc to build the binary
the oputput of mpicc -show is
gcc -I/home/rpimpi/mpich3-install/__include -L/home/rpimpi/mpich3-install/__lib -Wl,-rpath -Wl,/home/rpimpi/mpich3-__install/lib -Wl,--enable-new-dtags -lmpi -lrt -lpthread
Sophie
On 9 September 2014 00:48, Kenneth Raffenetti <[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>> wrote:
Did you use mpicc to build your binary? What is the output of 'mpicc -show'. The compile wrappers should encode an RPATH tag in your program so that setting an LD_LIBRARY_PATH to find libmpi.so is unncessary.
Ken
On 09/08/2014 06:44 PM, Sophie Norman wrote:
Hi,
When running NAS parallel benchmarks using 4 Raspberry Pi nodes each running MPICH-3.1.2 I get the following error when I try to run the integer sort benchmark
~/NPB3.3/NPB3.3-MPI/bin $ mpiexec -n 4 -machinefile /home/pi/mpi_testing/____machinefile ./is.S.4
NAS Parallel Benchmarks 3.3 -- IS Benchmark
Size: 65536 (class S) Iterations: 10 Number of processes: 1
ERROR: compiled for 4 processes Number of active processes: 1 Exiting program!
./is.S.4: error while loading shared libraries: libmpi.so.12: cannot open shared object file: No such file or directory ./is.S.4: error while loading shared libraries: libmpi.so.12: cannot open shared object file: No such file or directory ./is.S.4: error while loading shared libraries: libmpi.so.12: cannot open shared object file: No such file or directory
I have tried export
LD_LIBRARY_PATH=$LD_LIBRARY_____PATH:/home/rpimpi/mpich3-____install/lib on each of the nodes, and each node works individually when run with the file ./is.S.1
$ldd ./is.S.4 give the following output for the master node
/usr/lib/arm-linux-gnueabihf/____libcofi_rpi.so (0xb6edf000) libmpi.so.12 => /home/rpimpi/mpich3-install/____lib/libmpi.so.12 (0xb6ca3000) libc.so.6 => /lib/arm-linux-gnueabihf/libc.____so.6 (0xb6b68000) librt.so.1 => /lib/arm-linux-gnueabihf/____librt.so.1 (0xb6b59000) libpthread.so.0 => /lib/arm-linux-gnueabihf/____libpthread.so.0 (0xb6b3a000) libgfortran.so.3 => /usr/lib/arm-linux-gnueabihf/____libgfortran.so.3 (0xb6a93000) libm.so.6 => /lib/arm-linux-gnueabihf/libm.____so.6 (0xb6a22000) libgcc_s.so.1 => /lib/arm-linux-gnueabihf/____libgcc_s.so.1 (0xb69fa000) /lib/ld-linux-armhf.so.3 (0xb6eed000)
please help
Thanks
Sophie
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