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 <raffenet@mcs.anl.gov> 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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