About EDEM API tutorial in linux and GPU solver conversion

QinHe_321 · 2025-02-01T00:05:58+00:00

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I have several packed dll about 'custom factory', 'custom particle body force' and 'custom contact model', also have the corresponding visutalstudio2017 header files.

How can I transfer them into linux .so document, and make them avalible for GPU solver? How does the packing works? and how do I compile .cu files?

I know there are several tutorial exists, but they are hard to follow because they are vague. It would be really helpful if there's step by step video tutorial.

Thanks

Qin

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PrasadAvilala

EDEMAPI Tutorial 2 - Contact Model.pdf

Hi Qin,

Please find the attached document the steps to convert dll to .so (Linux supported format) is explained from page-12 .

Hope this helps.

Thanks,

Prasad A

QinHe_321

Yes, but how can I compile my own .cl document? or can I use same .cl for every compile?

PrasadAvilala

.cl file is a GPU compatibility file if you convert to linux it supports GPU.

I suggest please go through the document and compile the steps, the attached document explains the detailed steps

QinHe_321

Yes, but how can I compile my own .cl document? or can I use same .cl for every compile?

This question is not answered in pdf.

PrasadAvilala

Please compile and check it should work, if it is not working please share the error message.

Stephen Cole

Hi , as Prasad mentions you don't need to compile the CUDA specific file. There is an overview video on EDEM GPU API here:

https://youtu.be/fyMUotkGObU

it's part of a series, part 1 is here:

https://youtu.be/TAbvgzrGP8Y

QinHe_321

Above is cpp for dll, while below is confinement.cu

they are both in "C:\Users\a1312\OneDrive\Documents\Altair\EDEM2024\ParticleBodyForce", but EDEM still recognize it as cpu only document

QinHe_321

I updated cu, still didn't work

Stephen Cole

Hi, do the file names match? You are defining the name of the .cu file in the CPU code under "GPU_FILENAME" , this name should match the name of the .cu file you have.

Regards

Stephen

QinHe_321

the names are

confinement.dll

confinement.cu

Stephen Cole

Hi,

Just to confirm did you change the code here "wtf" should read "confinement" as this is the name of the GPU file you are reading. You will have to recompile the CPU code afterwards to make sure this change is applied in the new model.

QinHe_321

The model is still cpu only after I change "wtf" into "confinement"

QinHe_321

#ifndef CUDACC
#include "cudaApiCore.cuh"
#include "apiConstants.cuh"
#include "CApiContact.cuh"
#include "CApiContactResults.cuh"
#include "CApiCustomPropertyData.cuh"
#include "CApiElement.cuh"
#include "CApiFieldData.cuh"
#include "CApiInteraction.cuh"
#include "CApiParticle.cuh"
#include "CApiSimulation.cuh"
#include "CApiTotalForce.cuh"
#include "CApiGeomTriangleInfo.cuh"
#include "CApiTriangleDeformationResult.cuh"
#include "CMat3x3.cuh"
#include "CQuaternion.cuh"
#include "CUtilitiesEquations.cuh"
#include "CUtilitiesMath.cuh"
#include "CUtilitiesPrecision.cuh"
#include "CVec3.cuh"
#endif

I found another tutorial have such include document, where can I find the menu of including requirement

QinHe_321

or maybe it is not recognized because I didn't add starting() and all other functions in cpp?

QinHe_321

https://community.altair.com/discussion/comment/189446#Comment_189446

still didn't work

Stephen Cole

Hi,

I would make sure the version of the code you are using is all up to date with your installed version

https://youtu.be/Bweffts_4qM?feature=shared

The detailed API documentation is in C:\Program Files\Altair\2024.1\EDEM\src\Api\Help > index.html (or your installed location) which gives all the functions. Starting runs some code on pressing play in the Simulator, it is not needed as standard but can be useful in some cases.

QinHe_321

the error is so weird, obviously I already defined GETFINTERFACE, but it still happens

QinHe_321

I solved the CUDA problem by adding a empty preference file function, it is necessary.

But not I couldn't find header files' location in linux server.

Stephen Cole

Hi, the folder structure for the header files is the same on Windows and Linux, but the default install location for the software may be different. If you have the altair isntall folder you can find then the header files in /version number/edem//src/Api

The files are the same on Windows and Linux, so you can just copy the required header files for the API from your windows install to the Linux machine if it's easier.

Regards

Stephen

QinHe_321

yes, it's inside linux_apps folder, with similar directory.

And I found another error in help document, it should be g++ instead of gcc, to compile .so correctly.

And \

-I

is necessary for linux terminal, but the tutorial didn't mention about "\"