SEHException when using xgboost with gpu

[gaop123]

I have installed latest Cuda version (9.2), and when setting the tree method to GPU* i get an SEHException "external component has thrown an exception", should i compile the program in a certain way after cuda installation? What should i do?, thanks!

[mdabros]

Hi @gaop123 ,

It could sound like a GPU memory issue. There are no special compilation needed once you have installed Cuda like descriped in the guide: Cuda installation.

Could you provide some details about the following:

• Settings of the xgboost learner (code)
• How large is the problem you are training on (number of rows, cols)
• If possible, detailed description from the SEHException

Best regards Mads

[gaop123]

I don't think it's a memory related issue, i have tried on some small data sets (about 500 rows and 100 cols) just to check but the exception is still thrown,

this is the code of the learning part:

       var sharpDtLearner = new

ClassificationXGBoostLearner(3,0.1,100,false,ClassificationObjective.GPUBinaryLogistic); var sut = sharpDtLearner.Learn(mat, outputs.Convert(x => (double)x));

      ProbabilityPrediction[] pp = this.xgboost.PredictProbability(mat);

this is then exception:

System.Runtime.InteropServices.SEHException (0x80004005): External component has thrown an exception. at XGBoost.lib.XGBOOST_NATIVE_METHODS.XGBoosterUpdateOneIter(IntPtr bHandle, Int32 iter, IntPtr dHandle) at XGBoost.lib.Booster.Update(DMatrix train, Int32 iter) at SharpLearning.XGBoost.Learners.ClassificationXGBoostLearner.Learn(F64Matrix observations, Double[] targets, Int32[] indices)

*if i change the objective to BinaryLogistic i't works perfectly. Thanks!

‫בתאריך יום ו׳, 7 בספט׳ 2018 ב-8:33 מאת ‪Mads Dabros‬‏ <‪ [email protected]‬‏>:‬

Hi @gaop123 https://github.com/gaop123 ,

It could sound like a GPU memory issue. There are no special compilation needed once you have installed Cuda like descriped in the guide: Cuda installation https://docs.nvidia.com/cuda/cuda-installation-guide-microsoft-windows/index.html .

Could you provide some details about the following:

• Settings of the xgboost learner (code)
• How large is the problem you are training on (number of rows, cols)
• If possible, detailed description from the SEHException

Best regards Mads

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