[mvapich-discuss] mpi4py and MVAPICH2 2.0b GDR, "Error in initializing MVAPICH2 ptmalloc library"

[Hari Subramoni]

Hello Filippo,

There are some incompatibilities with this combination that we are trying
to resolve. Please note that the performance of your program can be
affected when running without registration cache.

Regards,
Hari.


On Tue, Mar 4, 2014 at 6:02 PM, Filippo Spiga <spiga.filippo at gmail.com>wrote:

> Dear all,
>
> I am performing some experiments using mpi4py (1.3.1. I built the library
> against MVAPICH2 2.0b GDR, compilation is straightforward... no special
> flags are required.
>
> mpi4py has an internal tests that basically print the hostname of the
> nodes...
>
> $ mpirun -np 4 -ppn 2 python demo/helloworld.py
> WARNING: Error in initializing MVAPICH2 ptmalloc library.Continuing
> without InfiniBand registration cache support.
> Hello, World! I am process 0 of 4 on tesla45.
> Hello, World! I am process 1 of 4 on tesla45.
> Hello, World! I am process 2 of 4 on tesla46.
> Hello, World! I am process 3 of 4 on tesla46.
>
> This ptmalloc warning/error appears.
>
> Is there any known incompatibility between mpi4py and MVAPICH2? Can this
> warning/error affect the performance? Does anybody have seen such a error
> before using mpi4py?
>
> Best Regards,
> Filippo
>
> --
> Mr. Filippo SPIGA, M.Sc.
> http://www.linkedin.com/in/filippospiga ~ skype: filippo.spiga
>
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