Error in NL construction.

jinbae

I am trying to simulating with DualSph4.0

But sometimes, the simulator was stopped with error.

Error was like below
---------------------------------------------
*** Exception (JCellDivGpuSingle::Divide)
Text: Error in NL construction.( CUDA error: an illegal memory access was encounterd).


My GPU's specification was like below
---------------------------------------------
GeForce GTX 780 Ti
- Compute capability : 3.5
- Multiprocessors : 15 ( 2880 cores )
- Memory global : 3071 MB
- Clock rate : 1.07 GHz
- Run time limit on kernels : Yes
- ECC support enabled : No
- Memory shared : 49152 bytes

How could I solve this problem?
Which parameter can affect this situation?
I just increased the dp parameter.

Thank you for the tool and reading.

jinbae

Partially solved. When the sim was stopped with this error, I increased the "coefh" parameters. And then simulator works. But I don't know how to calculate the exact "coefh" value. Sometime the simulation was stopped with same error after 200 frame. And then I have to increase the "coefh" value, simulate again. Is there anybody know about that?

jinbae

0~422 frames : simulation works
423 frames : simulation stopped with this error

*** Exception (JCellDivGpuSingle::Divide)
Text: Error in NL construction. (CUDA error: an illegal memory access was encountered)

- My xml file information
The pointmin & pointmax in my case were pretty large.


gravity x="0.0" y="0.0" z="-9.81"
rhop0 value="1000.0"
hswl auto="true" value="0.0"
gamma value="7.0"
speedsystem auto="true" value="0"
coefsound value="10.0"
speedsound auto="true" value="0"
coefh value="1.9"
cflnumber value="0.2"


definition dp="10.0"
pointmin x="1460.0" y="-3040.0" z="-560.0"
pointmax x="2020.0" y="910.0" z="810.0"


parameter key="PosDouble" value="1"
parameter key="StepAlgorithm" value="2"
parameter key="VerletSteps" value="40"
parameter key="Kernel" value="2"
parameter key="ViscoTreatment" value="1"
parameter key="Visco" value="0.05"
parameter key="ViscoBoundFactor" value="0"
parameter key="DeltaSPH" value="0.0"
parameter key="#Shifting" value="0"
parameter key="#ShiftCoef" value="-2"
parameter key="#ShiftTFS" value="1.5"
parameter key="RigidAlgorithm" value="1"
parameter key="FtPause" units_comments="seconds" value="0.0"
parameter key="CoefDtMin" value="0.05"
parameter key="#DtIni" units_comments="seconds" value="0.0001"
parameter key="#DtMin" units_comments="seconds" value="0.00001"
parameter key="#DtFixed" value="DtFixed.dat"
parameter key="DtAllParticles" value="0"
parameter key="TimeMax" units_comments="seconds" value="200.0"
parameter key="TimeOut" units_comments="seconds" value="0.1"
parameter key="IncZ" units_comments="decimal" value="0"
parameter key="PartsOutMax" units_comments="decimal" value="1"
parameter key="RhopOutMin" units_comments="kg/m^3" value="700"
parameter key="RhopOutMax" units_comments="kg/m^3" value="1300"