[mvapich-discuss] Problem with reading parameters from stdin

[Jonathan Perkins]

It is also recommended for you to move to MVAPICH2 2.1 as there have been
several bug fixes and general improvements since 2.0b.

On Thu, Apr 16, 2015 at 1:53 PM Jonathan Perkins <
perkinjo at cse.ohio-state.edu> wrote:

> Hi Jerry.  I do not know of a direct option that you can use.  However
> wrapping your program with some script might help you.
>
> Can you try something like:
> mpirun -np 2 sh -c 'if [ "$MV2_COMM_WORLD_RANK" != "0" ]; then exec 0<&-
> && args_mpi ; else args_mpi < namelist.input; fi'
>
>
> On Thu, Apr 16, 2015 at 12:42 PM Liu Jianyu <jerry_leo at msn.com> wrote:
>
>> Hi,
>>
>>
>> I have a problem with reading namelist from stdin for the MPI run if built
>> ARPS with mvapich2 2.0b
>>
>> For example,
>>
>>     mpirun -np 12 arps_mpi  < namelist.input
>>
>> It  aborted with "process reading stdin too slowly" immediately.
>>
>> It is required that only one processor ( the root processor with rank0)
>> reads the stdin for configuration parameters.  In the IBM Parallel
>> Operatin Environment, there is an option "stdinmode 0" instructs
>> POE to allow only the processor with rank 0 read the stdin.
>>
>> Just wondering how to do this way with mvapich2 ?
>>
>>
>> Here are the output of ' mpiname -a'
>>
>> ./mpiname -a
>> MVAPICH2 2.0b Fri Nov  8 11:17:40 EST 2013 ch3:nemesis
>>
>> Compilation
>> CC: icc    -DNDEBUG -DNVALGRIND -O2
>> CXX: icpc   -DNDEBUG -DNVALGRIND -O2
>> F77: ifort   -O2
>> FC: ifort   -O2
>>
>> Configuration
>> --prefix=/nuist/p/public/app/mvapich2/2.0b/intel  \
>> --with-ib-libpath=/usr/lib64   \
>> --with-ib-include=/usr/include  \
>> --with-ibverbs-include=/usr/include \
>> --with-ibverbs-lib=/usr/lib64  \
>> --with-ibverbs=/  \
>> --enable-f77   \
>> --enable-fc  \
>> --with-device=ch3:nemesis:ib,tcp
>>
>>
>> Appreciating any comments
>>
>> Regards
>>
>>
>> Jerry
>>
>>
>>
>> _______________________________________________
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>> mvapich-discuss at cse.ohio-state.edu
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>>
>
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