[mvapich-discuss] RMA data corruption in 2.0, 2.1a

[Hari Subramoni]

Dear Dr. Fujita,

Thank you for the report. We will take a look at this issue and get back to
you soon.

Regards,
Hari.

On Fri, Oct 3, 2014 at 5:22 PM, Hajime Fujita <hfujita at uchicago.edu> wrote:

> Dear MVAPICH2 team,
>
> We found a potential bug in MVAPICH2 2.0 and 2.1a regarding RMA.
>
> When we run the attached program on two nodes (1 process/node), it
> produces the wrong result. This setting means inter-process
> communications goes over InfiniBand.
>
>   # Requesting interactive job with 2 nodes
>   $ sinteractive -N 2
>   $ mpiexec ./rma_putget_test # launches 2 proc
>   loc_buff[1024]=-1 != 1024
>
> If it works correctly, there would be no output.
>
> If we run this on a single machine with multiple processes, it runs
> correctly.
> If I'm using MPI RMA functions in some incorrect way please let me know.
>
>
> Hardware platform:
>   UChicago RCC Midway
>   http://rcc.uchicago.edu/resources/midway_specs.html
>
> MVAPICH versions and configurations:
>
> [hfujita at midway-login1 ~]$ mpichversion
> MVAPICH2 Version:       2.1a
> MVAPICH2 Release date:  Sun Sep 21 12:00:00 EDT 2014
> MVAPICH2 Device:        ch3:mrail
> MVAPICH2 configure:
> --prefix=/project/aachien/local/mvapich2-2.1a-gcc-4.8 --enable-shared
> MVAPICH2 CC:    gcc    -DNDEBUG -DNVALGRIND -O2
> MVAPICH2 CXX:   g++   -DNDEBUG -DNVALGRIND -O2
> MVAPICH2 F77:   gfortran -L/lib -L/lib   -O2
> MVAPICH2 FC:    gfortran   -O2
>
> [hfujita at midway-login1 ~]$ mpichversion
> MVAPICH2 Version:       2.0
> MVAPICH2 Release date:  Fri Jun 20 20:00:00 EDT 2014
> MVAPICH2 Device:        ch3:mrail
> MVAPICH2 configure:     --prefix=/software/mvapich2-2.0-el6-x86_64
> --enable-shared
> MVAPICH2 CC:    gcc    -DNDEBUG -DNVALGRIND -O2
> MVAPICH2 CXX:   g++   -DNDEBUG -DNVALGRIND
> MVAPICH2 F77:   gfortran -L/lib -L/lib   -O2
> MVAPICH2 FC:    gfortran
>
>
> Thank you,
> Hajime
>
> --
> Hajime Fujita
> Postdoctoral Scholar, Large-Scale Systems Group
> Department of Computer Science, The University of Chicago
> http://www.cs.uchicago.edu/people/hfujita
>
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>
>
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