[Pw_forum] MPI Error

[Paolo Giannozzi]

You should look for error messages in the output of QE (if any). What
you reported is a MPI warning and is related to the way your MPI
environment is installed, not to QE

Paolo


On Wed, Aug 17, 2016 at 2:14 PM, SELLAVEL E ca15m006
<ca15m006 at smail.iitm.ac.in> wrote:
> I installed QE in the following machine.
>
> Linux c1hn1 3.0.13-0.27-default #1 SMP Wed Feb 15 13:33:49 UTC 2012
> (d73692b) x86_64 x86_64 x86_64 GNU/Linux
>
> While running calculations on parallel the following error message is
> coming.Kindly help in this regard.
>
> --------------------------------------------------------------------------
> WARNING: It appears that your OpenFabrics subsystem is configured to only
> allow registering part of your physical memory.  This can cause MPI jobs to
> run with erratic performance, hang, and/or crash.
>
> This may be caused by your OpenFabrics vendor limiting the amount of
> physical memory that can be registered.  You should investigate the
> relevant Linux kernel module parameters that control how much physical
> memory can be registered, and increase them to allow registering all
> physical memory on your machine.
>
> See this Open MPI FAQ item for more information on these Linux kernel module
> parameters:
>
>     http://www.open-mpi.org/faq/?category=openfabrics#ib-locked-pages
>
>   Local host:              a1n32
>   Registerable memory:     32768 MiB
>   Total memory:            65512 MiB
>
> Your MPI job will continue, but may be behave poorly and/or hang.
> --------------------------------------------------------------------------
> [a1n32:11971] 3 more processes have sent help message
> help-mpi-btl-openib.txt / reg mem limit low
> [a1n32:11971] Set MCA parameter "orte_base_help_aggregate" to 0 to see all
> help / error messages
>
>
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-- 
Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,
Univ. Udine, via delle Scienze 208, 33100 Udine, Italy
Phone +39-0432-558216, fax +39-0432-558222