[Nek5000-users] Running Simulations in Parallel with nekbmpi

[nek5000-users at lists.mcs.anl.gov]

John,

Did you compile Nek5000 with MPI support (IFMPI=true in makenek)?

-Stefan

On 5/11/11, nek5000-users at lists.mcs.anl.gov
<nek5000-users at lists.mcs.anl.gov> wrote:
> Hey John,
>
> Just a initial thought, but have you set "lp" in the SIZE file to 2?
>
> Josh
>
> On Wed, May 11, 2011 at 1:44 PM,  <nek5000-users at lists.mcs.anl.gov> wrote:
>> Hello,
>>
>> I recently built nek on a new machine with an Intel i7.  I think I have
>> all
>> the necessary libraries and packages installed but it looks like nek is
>> trying to run 4 processors in series when I use nekbmpi.   Has anyone
>> experienced a similar problem?  Below is the header of my logfile for a
>> case
>> where I tried running with two processors.
>>
>>
>> Thanks,
>>
>> John
>>
>> /----------------------------------------------------------\\
>> |      _   __ ______ __ __  ______  ____   ____   ____     |
>> |     / | / // ____// //_/ / ____/ / __ \\ / __ \\ / __ \\    |
>> |    /  |/ // __/  / ,<   /___ \\  / / / // / / // / / /    |
>> |   / /|  // /___ / /| | ____/ / / /_/ // /_/ // /_/ /     |
>> |  /_/ |_//_____//_/ |_|/_____/  \\____/ \\____/ \\____/      |
>> |                                                          |
>> |----------------------------------------------------------|
>> |                                                          |
>> | NEK5000:  Open Source Spectral Element Solver            |
>> | COPYRIGHT (c) 2008-2010 UCHICAGO ARGONNE, LLC            |
>> | Version:  1.0rc1 / SVN r684                              |
>> | Web:      http://nek5000.mcs.anl.gov                     |
>> |                                                          |
>> \\----------------------------------------------------------/
>>
>>
>>  Number of processors:           1
>>  REAL    wdsize      :           8
>>  INTEGER wdsize      :           4
>> /----------------------------------------------------------\\
>> |      _   __ ______ __ __  ______  ____   ____   ____     |
>> |     / | / // ____// //_/ / ____/ / __ \\ / __ \\ / __ \\    |
>> |    /  |/ // __/  / ,<   /___ \\  / / / // / / // / / /    |
>> |   / /|  // /___ / /| | ____/ / / /_/ // /_/ // /_/ /     |
>> |  /_/ |_//_____//_/ |_|/_____/  \\____/ \\____/ \\____/      |
>> |                                                          |
>> |----------------------------------------------------------|
>> |                                                          |
>> | NEK5000:  Open Source Spectral Element Solver            |
>> | COPYRIGHT (c) 2008-2010 UCHICAGO ARGONNE, LLC            |
>> | Version:  1.0rc1 / SVN r684                              |
>> | Web:      http://nek5000.mcs.anl.gov                     |
>> |                                                          |
>> \\----------------------------------------------------------/
>>
>>
>>  Number of processors:           1
>>  REAL    wdsize      :           8
>>  INTEGER wdsize      :           4
>>
>>
>>   Beginning session:
>>
>> /home/akerleyj/repos/nek5_svn/research/flatchan_Re1600/fc1d.rea
>>
>>
>>  timer accuracy:   0.0000000E+00 sec
>>
>>  read .rea file
>>  nelgt/nelgv/lelt:     1510     1510     1600
>>  lx1  /lx2  /lx3 :        8        8        8
>>
>>  mapping elements to processors
>>
>>
>> _______________________________________________
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>>
>>
>
>
>
> --
> Josh Camp
>
> "All that is necessary for the triumph of evil is that good men do
> nothing" -- Edmund Burke
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