Learning Forum

[rajesh.pamarthi2711]

Hello,

Trying to execute an EM kind of simulation, with .k file having around 241000 elements.

I have parts like inductor, workpiece, field shaper and others , 5 in total . All acounting to section_solid of element 2 form.

control termination - end_time= 6.000e-04
control timestep - TSSFAC =0.667
EM_CONTROL_TIMESTEP = 5.000e-08 

I have tried to run the simulation with 3 nodes and 147 tasks. the termination time is about 6.000e-04 (control_termination)

#SBATCH –nodes=3             # use 1 node

#SBATCH –ntasks=147           # explicitly bind tasks to cores

#SBATCH –mem-per-cpu=4000M   # memory per CPU core

#SBATCH –error=error.log

 

module load GCC/13.2.0 intel-compilers/2023.2.1 impi/2021.10.0 Python/3.11.5 SciPy-bundle/2023.12 matplotlib/3.8.2 LS-DYNA/14.1.0

 

python ls.py

with one of the following line in Python code, 

 lsdyna_command = f’/software/rapids/r24.04/impi/2021.10.0-intel-compilers-2023.2.1/mpi/2021.10.0/bin/mpirun -genv I_MPI_PIN_DOMAIN=core -np 147 /software/rapids/r24.04/LS-DYNA/14.1.0-intel-2023b/ls-dyna_mpp_d_R14_1_0_x64_centos79_ifort190_avx2_intelmpi-2018_sharelib i={new_file_path} memory=128M'

 

    # Execute the LS-Dyna command

    print(“Running LS-Dyna…”)

    run_command(lsdyna_command)


For the above, the simulation started execution but appears to be terminated before total completion time. In my d3hsp, it gave out

 709 t 3.5450E-05 dt 5.00E-08 electromagnetism step

 

License routines forcing premature code termination.

Contact with the license server has been lost.

The server may have died or a network connectivity problem

may have occurred.

 

     710 t 3.5500E-05 dt 1.00E+06 write d3dump01 file          12/24/24 21:37:58

     710 t 3.5500E-05 dt 1.00E+06 flush i/o buffers            12/24/24 21:37:58

     710 t 3.5500E-05 dt 1.00E+06 write d3plot file            12/24/24 21:37:59

 

 N o r m a l    t e r m i n a t i o n                          12/24/24 21:37:59

 

 S t o r a g e   a l l o c a t i o n   

 

 Memory required to complete solution (memory=   5235K memory2=   2508K)

          Minimum   2408K on processor     5

          Maximum   2508K on processor    36

          Average   2424K

 

 Matrix Assembly dynamically allocated memory

          Maximum     56M

 

 Additional dynamically allocated memory

          Minimum    162M on processor   121

          Maximum    217M on processor   146

          Average    170M

 

 Total allocated memory

          Minimum    220M on processor   121

          Maximum    275M on processor   146

          Average    228M

 

 T i m i n g   i n f o r m a t i o n

                        CPU(seconds)   %CPU  Clock(seconds) %Clock

  —————————————————————-

  Keyword Processing … 2.8257E+00    0.01     2.8348E+00    0.01

  MPP Decomposition …. 1.6675E+01    0.06     1.7915E+01    0.06

    Init Proc ………. 1.0730E+01    0.04     1.0759E+01    0.04

    Decomposition …… 5.4681E-01    0.00     5.5070E-01    0.00

    Translation …….. 5.3983E+00    0.02     6.6042E+00    0.02

  Initialization ……. 1.3516E+01    0.05     1.3698E+01    0.05

    Init Proc Phase 1 .. 2.6186E+00    0.01     2.6754E+00    0.01

    Init Proc Phase 2 .. 1.4131E+00    0.01     1.4373E+00    0.01

  Element processing … 9.0849E-01    0.00     6.1107E+01    0.22

    Solids …………. 5.8148E-01    0.00     3.8135E+01    0.13

    E Other ………… 8.5733E-02    0.00     6.8885E+00    0.02

  Binary databases ….. 2.9037E+01    0.10     4.4529E+01    0.16

  ASCII database ……. 1.1411E-01    0.00     7.0965E+00    0.03

  Contact algorithm …. 8.2748E+01    0.30     1.1298E+02    0.40

    Interf. ID         1 1.9341E+01    0.07     1.9670E+01    0.07

    Interf. ID         2 5.4628E+01    0.20     7.0596E+01    0.25

  Rigid Bodies ……… 4.2108E+01    0.15     5.3479E+01    0.19

  EM solver ………… 2.7242E+04   98.45     2.7758E+04   97.85

    Misc …………… 6.1301E+02    2.22     6.6360E+02    2.34

    System Solve ……. 2.5164E+04   90.94     2.5492E+04   89.86

    FEM matrices setup . 1.1896E+02    0.43     1.3114E+02    0.46

    BEM matrices setup . 3.5966E+02    1.30     3.8563E+02    1.36

    FEMSTER to DYNA …. 4.3925E+02    1.59     5.2618E+02    1.85

    Compute fields ….. 5.4711E+02    1.98     5.5925E+02    1.97

  Time step size ……. 1.4727E+02    0.53     1.5686E+02    0.55

  Group force file ….. 1.0339E-02    0.00     8.1230E-01    0.00

  Others …………… 1.1413E+01    0.04     1.6252E+01    0.06

    Force Sharing …… 1.1304E+01    0.04     1.3013E+01    0.05

  Misc. 1 ………….. 4.3898E+00    0.02     2.2644E+01    0.08

    Scale Masses ……. 7.7710E-03    0.00     5.5401E-01    0.00

    Force Constraints .. 1.3901E-02    0.00     6.8301E-01    0.00

    Force to Accel ….. 1.0230E-02    0.00     7.7030E-01    0.00

    Constraint Sharing . 3.3435E-02    0.00     1.2809E+00    0.00

    Update RB nodes …. 3.8281E-02    0.00     2.4141E+00    0.01

  Misc. 2 ………….. 1.1875E-01    0.00     9.0182E+00    0.03

  Misc. 3 ………….. 7.7356E+01    0.28     8.4258E+01    0.30

  Misc. 4 ………….. 1.1225E-01    0.00     6.7043E+00    0.02

    Timestep Init …… 1.6812E-02    0.00     4.6854E-01    0.00

    Apply Loads …….. 8.1626E-02    0.00     5.6807E+00    0.02

  —————————————————————-

  T o t a l s            2.7670E+04  100.00     2.8368E+04  100.00

 

 Problem time       =    3.5500E-05

 Problem cycle      =       710

 Total CPU time     =     27670 seconds (   7 hours 41 minutes 10 seconds)

 CPU time per zone cycle  =     161549.932 nanoseconds

 Clock time per zone cycle=     165622.228 nanoseconds

 

 Parallel execution with    147 MPP proc

 NLQ used/max                64/    64

I think the total termination has not executed; it prematurely stopped execution. It's taking very long to run. Cannot determine what the problem is, need to run it quickly.

[George Karnos]

If using the ANSYS License Manager:
Check the environment variable “LSTC_LICENSE”, that could have the variable value ‘Network’. 
Change that to ‘LSTC_LICENSE=ANSYS’ [w/o quotes]