/// <summary> /// Main methods for model training /// </summary> /// <param name="mlconfigPath"></param> /// <param name="token"></param> /// <param name="trainingProgress"></param> /// <param name="pdevice"></param> /// <returns></returns> public static TrainResult TrainModel(string mlconfigPath, CancellationToken token, TrainingProgress trainingProgress, ProcessDevice pdevice) { try { //device definition DeviceDescriptor device = MLFactory.GetDevice(pdevice); //LOad ML configuration file var dicMParameters = MLFactory.LoadMLConfiguration(mlconfigPath); //add path of model folder dicMParameters.Add("root", Project.GetMLConfigFolder(mlconfigPath)); //prepare NN data var retVal = MLFactory.PrepareNNData(dicMParameters, CustomNNModels.CustomModelCallEntryPoint, device); //create trainer var tr = new MLTrainer(retVal.f.StreamConfigurations, retVal.f.InputVariables, retVal.f.OutputVariables); //setup model checkpoint string modelCheckPoint = null; if (dicMParameters.ContainsKey("configid")) { modelCheckPoint = MLFactory.GetModelCheckPointPath(mlconfigPath, dicMParameters["configid"].Trim(' ')); } //setup model checkpoint string historyPath = null; if (dicMParameters.ContainsKey("configid")) { historyPath = MLFactory.GetTrainingHistoryPath(mlconfigPath, dicMParameters["configid"].Trim(' ')); } //create trainer var trainer = tr.CreateTrainer(retVal.nnModel, retVal.lrData, retVal.trData, modelCheckPoint, historyPath); //perform training var result = tr.Train(trainer, retVal.nnModel, retVal.trData, retVal.mbs, device, token, trainingProgress, modelCheckPoint, historyPath); return(result); } catch (Exception) { throw; } }
public void RunModel(string mlconfigName, CancellationToken token, TrainingProgress trainingProgress, ProcessDevice pdevice) { Project.TrainModel(mlconfigName, token, trainingProgress, pdevice); }
protected virtual ProgressData progressTraining(TrainingParameters trParams, Trainer trainer, Function network, MinibatchSourceEx mbs, int epoch, TrainingProgress progress, DeviceDescriptor device) { //calculate average training loss and evaluation var mbAvgLoss = trainer.PreviousMinibatchLossAverage(); var mbAvgEval = trainer.PreviousMinibatchEvaluationAverage(); //get training dataset double trainEval = mbAvgEval; //sometimes when the data set is huge validation model against // full training dataset could take time, so we can skip it by setting parameter 'FullTrainingSetEval' if (trParams.FullTrainingSetEval) { var evParams = new EvaluationParameters() { MinibatchSize = trParams.BatchSize, MBSource = new MinibatchSourceEx(mbs.Type, this.StreamConfigurations.ToArray(), this.InputVariables, this.OutputVariables, mbs.TrainingDataFile, null, MinibatchSource.FullDataSweep, false, 0), Ouptut = OutputVariables, Input = InputVariables, }; var result = MLEvaluator.EvaluateFunction(trainer.Model(), evParams, device); trainEval = MLEvaluator.CalculateMetrics(trainer.EvaluationFunction().Name, result.actual, result.predicted, device); } string bestModelPath = m_bestModelPath; double validEval = 0; //in case validation data set is empty don't perform test-minibatch if (!string.IsNullOrEmpty(mbs.ValidationDataFile)) { var evParams = new EvaluationParameters() { MinibatchSize = trParams.BatchSize, //StrmsConfig = StreamConfigurations.ToArray(), MBSource = new MinibatchSourceEx(mbs.Type, this.StreamConfigurations.ToArray(), this.InputVariables, this.OutputVariables, mbs.ValidationDataFile, null, MinibatchSource.FullDataSweep, false, 0), Ouptut = OutputVariables, Input = InputVariables, }; // var result = MLEvaluator.EvaluateFunction(trainer.Model(), evParams, device); validEval = MLEvaluator.CalculateMetrics(trainer.EvaluationFunction().Name, result.actual, result.predicted, device); } //here we should decide if the current model worth to be saved into temp location // depending of the Evaluation function which sometimes can be better if it is greater that previous (e.g. ClassificationAccuracy) if (isBetterThanPrevious(trainEval, validEval, StatMetrics.IsGoalToMinimize(trainer.EvaluationFunction())) && trParams.SaveModelWhileTraining) { //save model var strFilePath = $"{trParams.ModelTempLocation}\\model_at_{epoch}of{trParams.Epochs}_epochs_TimeSpan_{DateTime.Now.Ticks}"; if (!Directory.Exists(trParams.ModelTempLocation)) { Directory.CreateDirectory(trParams.ModelTempLocation); } //save temp model network.Save(strFilePath); //set training and validation evaluation to previous state m_PrevTrainingEval = trainEval; m_PrevValidationEval = validEval; bestModelPath = strFilePath; var tpl = Tuple.Create <double, double, string>(trainEval, validEval, strFilePath); m_ModelEvaluations.Add(tpl); } m_bestModelPath = bestModelPath; //create progressData object var prData = new ProgressData(); prData.EpochTotal = trParams.Epochs; prData.EpochCurrent = epoch; prData.EvaluationFunName = trainer.EvaluationFunction().Name; prData.TrainEval = trainEval; prData.ValidationEval = validEval; prData.MinibatchAverageEval = mbAvgEval; prData.MinibatchAverageLoss = mbAvgLoss; //prData.BestModel = bestModelPath; //the progress is only reported if satisfied the following condition if (progress != null && (epoch % trParams.ProgressFrequency == 0 || epoch == 1 || epoch == trParams.Epochs)) { //add info to the history m_trainingHistory.Add(new Tuple <int, float, float, float, float>(epoch, (float)mbAvgLoss, (float)mbAvgEval, (float)trainEval, (float)validEval)); //send progress progress(prData); // //Console.WriteLine($"Epoch={epoch} of {trParams.Epochs} processed."); } //return progress data return(prData); }
/// <summary> /// Main method for training /// </summary> /// <param name="trainer"></param> /// <param name="network"></param> /// <param name="trParams"></param> /// <param name="miniBatchSource"></param> /// <param name="device"></param> /// <param name="token"></param> /// <param name="progress"></param> /// <param name="modelCheckPoint"></param> /// <returns></returns> public override TrainResult Train(Trainer trainer, Function network, TrainingParameters trParams, MinibatchSourceEx miniBatchSource, DeviceDescriptor device, CancellationToken token, TrainingProgress progress, string modelCheckPoint, string historyPath) { try { //create trainer result. // the variable indicate how training process is ended // completed, stopped, crashed, var trainResult = new TrainResult(); var historyFile = ""; //create training process evaluation collection //for each iteration it is stored evaluationValue for training, and validation set with the model m_ModelEvaluations = new List <Tuple <double, double, string> >(); //check what is the optimization (Minimization (error) or maximization (accuracy)) bool isMinimize = StatMetrics.IsGoalToMinimize(trainer.EvaluationFunction()); //setup first iteration if (m_trainingHistory == null) { m_trainingHistory = new List <Tuple <int, float, float, float, float> >(); } //in case of continuation of training iteration must start with the last of path previous training process int epoch = (m_trainingHistory.Count > 0)? m_trainingHistory.Last().Item1 + 1:1; //define progressData ProgressData prData = null; //define helper variable collection var vars = InputVariables.Union(OutputVariables).ToList(); //training process while (true) { //get next mini batch data var args = miniBatchSource.GetNextMinibatch(trParams.BatchSize, device); var isSweepEnd = args.Any(a => a.Value.sweepEnd); //prepare the data for trainer var arguments = MinibatchSourceEx.ToMinibatchValueData(args, vars); trainer.TrainMinibatch(arguments, isSweepEnd, device); //make progress if (isSweepEnd) { //check the progress of the training process prData = progressTraining(trParams, trainer, network, miniBatchSource, epoch, progress, device); //check if training process ends if (epoch >= trParams.Epochs) { //save training checkpoint state if (!string.IsNullOrEmpty(modelCheckPoint)) { trainer.SaveCheckpoint(modelCheckPoint); } //save training history if (!string.IsNullOrEmpty(historyPath)) { string header = $"{trainer.LossFunction().Name};{trainer.EvaluationFunction().Name};"; MLFactory.SaveTrainingHistory(m_trainingHistory, header, historyPath); } //save best or last trained model and send report last time before trainer completes var bestModelPath = saveBestModel(trParams, trainer.Model(), epoch, isMinimize); // if (progress != null) { progress(prData); } // trainResult.Iteration = epoch; trainResult.ProcessState = ProcessState.Compleated; trainResult.BestModelFile = bestModelPath; trainResult.TrainingHistoryFile = historyFile; break; } else { epoch++; } } //stop in case user request it if (token.IsCancellationRequested) { if (!string.IsNullOrEmpty(modelCheckPoint)) { trainer.SaveCheckpoint(modelCheckPoint); } //save training history if (!string.IsNullOrEmpty(historyPath)) { string header = $"{trainer.LossFunction().Name};{trainer.EvaluationFunction().Name};"; MLFactory.SaveTrainingHistory(m_trainingHistory, header, historyPath); } //sometime stopping training process can be before first epoch passed so make a incomplete progress if (prData == null)//check the progress of the training process { prData = progressTraining(trParams, trainer, network, miniBatchSource, epoch, progress, device); } //save best or last trained model and send report last time before trainer terminates var bestModelPath = saveBestModel(trParams, trainer.Model(), epoch, isMinimize); // if (progress != null) { progress(prData); } //setup training result trainResult.Iteration = prData.EpochCurrent; trainResult.ProcessState = ProcessState.Stopped; trainResult.BestModelFile = bestModelPath; trainResult.TrainingHistoryFile = historyFile; break; } } return(trainResult); } catch (Exception ex) { var ee = ex; throw; } finally { } }
/// <summary> /// Calback from the training in order to inform user about trining progress /// </summary> /// <param name="trParams"></param> /// <param name="trainer"></param> /// <param name="network"></param> /// <param name="mbs"></param> /// <param name="epoch"></param> /// <param name="progress"></param> /// <param name="device"></param> /// <returns></returns> protected virtual ProgressData progressTraining(TrainingParameters trParams, Trainer trainer, Function network, MinibatchSourceEx mbs, int epoch, TrainingProgress progress, DeviceDescriptor device) { //calculate average training loss and evaluation var mbAvgLoss = trainer.PreviousMinibatchLossAverage(); var mbAvgEval = trainer.PreviousMinibatchEvaluationAverage(); var vars = InputVariables.Union(OutputVariables).ToList(); //get training dataset double trainEval = mbAvgEval; //sometimes when the data set is huge validation model against // full training dataset could take time, so we can skip it by setting parameter 'FullTrainingSetEval' if (trParams.FullTrainingSetEval) { if (m_TrainData == null || m_TrainData.Values.Any(x => x.data.IsValid == false)) { using (var streamDatat = MinibatchSourceEx.GetFullBatch(mbs.Type, mbs.TrainingDataFile, mbs.StreamConfigurations, device)) { //get full training dataset m_TrainData = MinibatchSourceEx.ToMinibatchData(streamDatat, vars, mbs.Type); } //perform evaluation of the current model on whole training dataset trainEval = trainer.TestMinibatch(m_TrainData, device); } } string bestModelPath = m_bestModelPath; double validEval = 0; //in case validation data set is empty don't perform test-minibatch if (!string.IsNullOrEmpty(mbs.ValidationDataFile)) { if (m_ValidationData == null || m_ValidationData.Values.Any(x => x.data.IsValid == false)) { //get validation dataset using (var streamData = MinibatchSourceEx.GetFullBatch(mbs.Type, mbs.ValidationDataFile, mbs.StreamConfigurations, device)) { //store validation data for future testing m_ValidationData = MinibatchSourceEx.ToMinibatchData(streamData, vars, mbs.Type); } } //perform evaluation of the current model with validation dataset validEval = trainer.TestMinibatch(m_ValidationData, device); } //here we should decide if the current model worth to be saved into temp location // depending of the Evaluation function which sometimes can be better if it is greater that previous (e.g. ClassificationAccuracy) if (isBetterThanPrevious(trainEval, validEval, StatMetrics.IsGoalToMinimize(trainer.EvaluationFunction())) && trParams.SaveModelWhileTraining) { //save model var strFilePath = $"{trParams.ModelTempLocation}\\model_at_{epoch}of{trParams.Epochs}_epochs_TimeSpan_{DateTime.Now.Ticks}"; if (!Directory.Exists(trParams.ModelTempLocation)) { Directory.CreateDirectory(trParams.ModelTempLocation); } //save temp model network.Save(strFilePath); //set training and validation evaluation to previous state m_PrevTrainingEval = trainEval; m_PrevValidationEval = validEval; bestModelPath = strFilePath; var tpl = Tuple.Create <double, double, string>(trainEval, validEval, strFilePath); m_ModelEvaluations.Add(tpl); } m_bestModelPath = bestModelPath; //create progressData object var prData = new ProgressData(); prData.EpochTotal = trParams.Epochs; prData.EpochCurrent = epoch; prData.EvaluationFunName = trainer.EvaluationFunction().Name; prData.TrainEval = trainEval; prData.ValidationEval = validEval; prData.MinibatchAverageEval = mbAvgEval; prData.MinibatchAverageLoss = mbAvgLoss; //the progress is only reported if satisfied the following condition if (progress != null && (epoch % trParams.ProgressFrequency == 0 || epoch == 1 || epoch == trParams.Epochs)) { //add info to the history m_trainingHistory.Add(new Tuple <int, float, float, float, float>(epoch, (float)mbAvgLoss, (float)mbAvgEval, (float)trainEval, (float)validEval)); //send progress progress(prData); // //Console.WriteLine($"Epoch={epoch} of {trParams.Epochs} processed."); } //return progress data return(prData); }
public bool Stop(TrainingProgress progress) => progress.Loss <= SmallestRequiredLoss ? true : false;