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Problem in parallel processing [Process affinity not being set]

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Old   November 27, 2017, 03:08
Default Problem in parallel processing [Process affinity not being set]
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Hey guys
I'm trying to do some parallel processing using Ansys fluent 18 but I have a problem.

When I set processs to e.g. 35 I get this error:

hp-reep is already loaded (92.9758%).                       Process affinity not being set.
And this report is what I get after running Fluent:

Host spawning Node 0 on machine "hp-reep" (win64).
Host 0 -- ip -- ranks 0 - 34

 host | 0
    0 : SHM

 Prot -  All Intra-node communication is: SHM

ID    Hostname   Core  O.S.         PID    Vendor                   
n34   hp-reep  35/2  Windows-x64  8968   Intel(R) Xeon(R) E5-2699 
n33   hp-reep  34/2  Windows-x64  3396   Intel(R) Xeon(R) E5-2699 
n32   hp-reep  33/2  Windows-x64  4968   Intel(R) Xeon(R) E5-2699 
n31   hp-reep  32/2  Windows-x64  6080   Intel(R) Xeon(R) E5-2699 
n30   hp-reep  31/2  Windows-x64  11000  Intel(R) Xeon(R) E5-2699 
n29   hp-reep  30/2  Windows-x64  260    Intel(R) Xeon(R) E5-2699 
n28   hp-reep  29/2  Windows-x64  4340   Intel(R) Xeon(R) E5-2699 
n27   hp-reep  28/2  Windows-x64  3496   Intel(R) Xeon(R) E5-2699 
n26   hp-reep  27/2  Windows-x64  11072  Intel(R) Xeon(R) E5-2699 
n25   hp-reep  26/2  Windows-x64  480    Intel(R) Xeon(R) E5-2699 
n24   hp-reep  25/2  Windows-x64  8740   Intel(R) Xeon(R) E5-2699 
n23   hp-reep  24/2  Windows-x64  8704   Intel(R) Xeon(R) E5-2699 
n22   hp-reep  23/2  Windows-x64  828    Intel(R) Xeon(R) E5-2699 
n21   hp-reep  22/2  Windows-x64  5800   Intel(R) Xeon(R) E5-2699 
n20   hp-reep  21/2  Windows-x64  8376   Intel(R) Xeon(R) E5-2699 
n19   hp-reep  20/2  Windows-x64  8280   Intel(R) Xeon(R) E5-2699 
n18   hp-reep  19/2  Windows-x64  8224   Intel(R) Xeon(R) E5-2699 
n17   hp-reep  18/2  Windows-x64  6528   Intel(R) Xeon(R) E5-2699 
n16   hp-reep  17/2  Windows-x64  8916   Intel(R) Xeon(R) E5-2699 
n15   hp-reep  16/2  Windows-x64  8176   Intel(R) Xeon(R) E5-2699 
ID    Hostname   Core  O.S.         PID    Vendor                   
n14   hp-reep  15/2  Windows-x64  8980   Intel(R) Xeon(R) E5-2699 
n13   hp-reep  14/2  Windows-x64  1460   Intel(R) Xeon(R) E5-2699 
n12   hp-reep  13/2  Windows-x64  9164   Intel(R) Xeon(R) E5-2699 
n11   hp-reep  12/2  Windows-x64  9540   Intel(R) Xeon(R) E5-2699 
n10   hp-reep  11/2  Windows-x64  9336   Intel(R) Xeon(R) E5-2699 
n9    hp-reep  10/2  Windows-x64  4388   Intel(R) Xeon(R) E5-2699 
n8    hp-reep  9/2   Windows-x64  5512   Intel(R) Xeon(R) E5-2699 
n7    hp-reep  8/2   Windows-x64  6156   Intel(R) Xeon(R) E5-2699 
n6    hp-reep  7/2   Windows-x64  8428   Intel(R) Xeon(R) E5-2699 
n5    hp-reep  6/2   Windows-x64  10028  Intel(R) Xeon(R) E5-2699 
n4    hp-reep  5/2   Windows-x64  9192   Intel(R) Xeon(R) E5-2699 
n3    hp-reep  4/2   Windows-x64  9328   Intel(R) Xeon(R) E5-2699 
n2    hp-reep  3/2   Windows-x64  9412   Intel(R) Xeon(R) E5-2699 
n1    hp-reep  2/2   Windows-x64  9512   Intel(R) Xeon(R) E5-2699 
n0*   hp-reep  1/2   Windows-x64  8512   Intel(R) Xeon(R) E5-2699 
host  hp-reep        Windows-x64  8316   Intel(R) Xeon(R) E5-2699 

MPI Option Selected: ibmmpi
Selected system interconnect: default

Cleanup script file is C:\Users\Administrator\Desktop\Aerospike-mesh-quad-1-2-new\cleanup-fluent-hp-reep-8316.bat

hp-reep is already loaded (92.9758%).                       Process affinity not being set.
Reading "\"| gunzip -c \"C:\Users\Administrator\Desktop\Aerospike-mesh-quad-1-2-new\Aerospike_files\dp0\FLU-1\Fluent\SYS.1-Setup-Output.cas.gz\"\""...
Buffering for file scan...

  500500 quadrilateral cells, zone  3, binary.
  995095 2D interior faces, zone  1, binary.
    2804 2D interior faces, zone  2, binary.
    2716 2D pressure-outlet faces, zone  6, binary.
     100 2D velocity-inlet faces, zone  7, binary.
    1680 2D wall faces, zone  8, binary.
    1706 2D axis faces, zone  9, binary.
  503602 nodes, binary.
  503602 node flags, binary.

    auto partitioning mesh by Metis (fast),
    distributing mesh
        bandwidth reduction using Reverse Cuthill-McKee: 14350/138 = 103.986
    solid-surface_bodySetting solid-surface_body (mixture) ... Done.
 Setting zone id of solid-surface_body to 3.
 Setting zone id of interior-surface_body to 1.
 Setting zone id of surface_body to 2.
 Setting zone id of outlet to 6.
 Setting zone id of inlet to 7.
 Setting zone id of wall to 8.
 Setting zone id of axis to 9.
Setting solid-surface_body (mixture) ... Done.
Setting inlet (mixture) (zone type changed to pressure-inlet) ... Done.
Setting interior-surface_body (mixture) ... Done.
Setting surface_body (mixture) ... Done.
Setting outlet (mixture) ... Done.
Setting wall (mixture) ... Done.
Setting axis (mixture) ... Done.

 warning: for compressible (ideal and real) gas models with buoyancy,
 it is recommended to use a specified operating density value of zero.
 GUI access: Cell Zone/Boundary Conditions -> Operating Conditions... 
 TUI access: define operating-conditions operating-density? 


Preparing mesh for display...

Setting Post Processing and Surfaces information ...     Done.
An image of task manager is attached.

By the way, when I run the calculation, it works as serial processing. I already ran calculation on this device for this project with parallel processing and everything was fine but now it doesn't work. What's the problem?

Edit: just tried 2 procces and again got this error.
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Old   October 3, 2018, 16:57
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I've got the same problem

Replying only to get this post up
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Old   October 4, 2018, 12:14
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It is a warning message. It's a job scheduling problem and there's almost nothing you can do about it from inside Fluent. It basically means your cpu is busy doing other things and will not prioritize your Fluent processes. Fluent will be running in the background compared to whatever else is being done by your system.

What you can do, is stop running other programs. Figure out what is utilizing the cpu and shut it down, or run on a fewer number of available cores.

This message is a hint:

hostname is already loaded (##%).
Whatever % is how much % cpu is already being utilized. If it's 90% then your cpu is already 90% loaded doing other stuff.

Last edited by LuckyTran; October 5, 2018 at 10:12.
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Old   October 4, 2018, 18:10
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Thank you!

I suspected this should be the problem, but I needed someone who really knows this.
I've read some thread about this, turned off hyperthreading as suggested and now barely got this message.
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