MPICH3 not running on multiple mahines: hydra_pmi_poxy error : Exec format error

Question

I set up MPICH3 (mpich-3.1.3) on my notebook(Intel Core i5) and a slave processor running on ARM Cortex15 processor and both running Ubuntu 14.04 OS with ssh keygen setup for free communication.

I have installed mpich3 in the folder which is shared between the cluster through nfs.

I have exported the path from my master server only. The installation went well and i tried out the following command on my master node alone which runs fine:

    mpiexec -n 2 ./cpi
    Process 0 of 2 is on MingF
    Process 1 of 2 is on MingF
    pi is approximately 3.1415926544231341, Error is 0.0000000008333410
    wall clock time = 0.000182

But when I try running on my slave and master, then i get this error and it hangs:

    mpiexec -f hosts -n 2 ./cpi
    bash: /mirror/mpich3/bin/hydra_pmi_proxy: cannot execute binary file: Exec format error

It hangs there until i press 'Ctrl + C' to break out of it.

I am guessing its because of the change in processor type but I may be wrong. could someone help me out?

Answer 1

You cannot run the same executable on such different architectures as x86 and ARM. Compile it separately on both machines and pay attention to the endianness of the ARM machine.