import argparse import datetime import os import sys import numpy as np from torch.utils.tensorboard import SummaryWriter import torch import torch.nn as nn from torch.optim import SGD, Adam from torch.utils.data import DataLoader from util.util import enumerateWithEstimate from .dsets import LunaDataset from util.logconf import logging from .model import LunaModel log = logging.getLogger(__name__) # log.setLevel(logging.WARN) log.setLevel(logging.INFO) log.setLevel(logging.DEBUG) # Used for computeBatchLoss and logMetrics to index into metrics_t/metrics_a METRICS_LABEL_NDX=0 METRICS_PRED_NDX=1 METRICS_LOSS_NDX=2 METRICS_SIZE = 3 class LunaTrainingApp: def __init__(self, sys_argv=None): if sys_argv is None: sys_argv = sys.argv[1:] parser = argparse.ArgumentParser() parser.add_argument('--num-workers', help='Number of worker processes for background data loading', default=8, type=int, ) parser.add_argument('--batch-size', help='Batch size to use for training', default=32, type=int, ) parser.add_argument('--epochs', help='Number of epochs to train for', default=1, type=int, ) parser.add_argument('--tb-prefix', default='p2ch11', help="Data prefix to use for Tensorboard run. Defaults to chapter.", ) parser.add_argument('comment', help="Comment suffix for Tensorboard run.", nargs='?', default='dwlpt', ) self.cli_args = parser.parse_args(sys_argv) self.time_str = datetime.datetime.now().strftime('%Y-%m-%d_%H.%M.%S') self.trn_writer = None self.val_writer = None self.totalTrainingSamples_count = 0 self.use_cuda = torch.cuda.is_available() self.device = torch.device("cuda" if self.use_cuda else "cpu") self.model = self.initModel() self.optimizer = self.initOptimizer() def initModel(self): model = LunaModel() if self.use_cuda: log.info("Using CUDA; {} devices.".format(torch.cuda.device_count())) if torch.cuda.device_count() > 1: model = nn.DataParallel(model) model = model.to(self.device) return model def initOptimizer(self): return SGD(self.model.parameters(), lr=0.001, momentum=0.99) # return Adam(self.model.parameters()) def initTrainDl(self): train_ds = LunaDataset( val_stride=10, isValSet_bool=False, ) batch_size = self.cli_args.batch_size if self.use_cuda: batch_size *= torch.cuda.device_count() train_dl = DataLoader( train_ds, batch_size=batch_size, num_workers=self.cli_args.num_workers, pin_memory=self.use_cuda, ) return train_dl def initValDl(self): val_ds = LunaDataset( val_stride=10, isValSet_bool=True, ) batch_size = self.cli_args.batch_size if self.use_cuda: batch_size *= torch.cuda.device_count() val_dl = DataLoader( val_ds, batch_size=batch_size, num_workers=self.cli_args.num_workers, pin_memory=self.use_cuda, ) return val_dl def initTensorboardWriters(self): if self.trn_writer is None: log_dir = os.path.join('runs', self.cli_args.tb_prefix, self.time_str) self.trn_writer = SummaryWriter( log_dir=log_dir + '-trn_cls-' + self.cli_args.comment) self.val_writer = SummaryWriter( log_dir=log_dir + '-val_cls-' + self.cli_args.comment) def main(self): log.info("Starting {}, {}".format(type(self).__name__, self.cli_args)) train_dl = self.initTrainDl() val_dl = self.initValDl() for epoch_ndx in range(1, self.cli_args.epochs + 1): log.info("Epoch {} of {}, {}/{} batches of size {}*{}".format( epoch_ndx, self.cli_args.epochs, len(train_dl), len(val_dl), self.cli_args.batch_size, (torch.cuda.device_count() if self.use_cuda else 1), )) trnMetrics_t = self.doTraining(epoch_ndx, train_dl) self.logMetrics(epoch_ndx, 'trn', trnMetrics_t) valMetrics_t = self.doValidation(epoch_ndx, val_dl) self.logMetrics(epoch_ndx, 'val', valMetrics_t) if hasattr(self, 'trn_writer'): self.trn_writer.close() self.val_writer.close() def doTraining(self, epoch_ndx, train_dl): self.model.train() trnMetrics_g = torch.zeros( METRICS_SIZE, len(train_dl.dataset), device=self.device, ) batch_iter = enumerateWithEstimate( train_dl, "E{} Training".format(epoch_ndx), start_ndx=train_dl.num_workers, ) for batch_ndx, batch_tup in batch_iter: self.optimizer.zero_grad() loss_var = self.computeBatchLoss( batch_ndx, batch_tup, train_dl.batch_size, trnMetrics_g ) loss_var.backward() self.optimizer.step() # # This is for adding the model graph to TensorBoard. # if epoch_ndx == 1 and batch_ndx == 0: # with torch.no_grad(): # model = LunaModel() # self.trn_writer.add_graph(model, batch_tup[0], verbose=True) # self.trn_writer.close() self.totalTrainingSamples_count += len(train_dl.dataset) return trnMetrics_g.to('cpu') def doValidation(self, epoch_ndx, val_dl): with torch.no_grad(): self.model.eval() valMetrics_g = torch.zeros( METRICS_SIZE, len(val_dl.dataset), device=self.device, ) batch_iter = enumerateWithEstimate( val_dl, "E{} Validation ".format(epoch_ndx), start_ndx=val_dl.num_workers, ) for batch_ndx, batch_tup in batch_iter: self.computeBatchLoss( batch_ndx, batch_tup, val_dl.batch_size, valMetrics_g) return valMetrics_g.to('cpu') def computeBatchLoss(self, batch_ndx, batch_tup, batch_size, metrics_g): input_t, label_t, _series_list, _center_list = batch_tup input_g = input_t.to(self.device, non_blocking=True) label_g = label_t.to(self.device, non_blocking=True) logits_g, probability_g = self.model(input_g) loss_func = nn.CrossEntropyLoss(reduction='none') loss_g = loss_func( logits_g, label_g[:,1], ) start_ndx = batch_ndx * batch_size end_ndx = start_ndx + label_t.size(0) metrics_g[METRICS_LABEL_NDX, start_ndx:end_ndx] = \ label_g[:,1].detach() metrics_g[METRICS_PRED_NDX, start_ndx:end_ndx] = \ probability_g[:,1].detach() metrics_g[METRICS_LOSS_NDX, start_ndx:end_ndx] = \ loss_g.detach() return loss_g.mean() def logMetrics( self, epoch_ndx, mode_str, metrics_t, classificationThreshold=0.5, ): self.initTensorboardWriters() log.info("E{} {}".format( epoch_ndx, type(self).__name__, )) negLabel_mask = metrics_t[METRICS_LABEL_NDX] <= classificationThreshold negPred_mask = metrics_t[METRICS_PRED_NDX] <= classificationThreshold posLabel_mask = ~negLabel_mask posPred_mask = ~negPred_mask neg_count = int(negLabel_mask.sum()) pos_count = int(posLabel_mask.sum()) neg_correct = int((negLabel_mask & negPred_mask).sum()) pos_correct = int((posLabel_mask & posPred_mask).sum()) metrics_dict = {} metrics_dict['loss/all'] = \ metrics_t[METRICS_LOSS_NDX].mean() metrics_dict['loss/neg'] = \ metrics_t[METRICS_LOSS_NDX, negLabel_mask].mean() metrics_dict['loss/pos'] = \ metrics_t[METRICS_LOSS_NDX, posLabel_mask].mean() metrics_dict['correct/all'] = (pos_correct + neg_correct) \ / np.float32(metrics_t.shape[1]) * 100 metrics_dict['correct/neg'] = neg_correct / np.float32(neg_count) * 100 metrics_dict['correct/pos'] = pos_correct / np.float32(pos_count) * 100 log.info( ("E{} {:8} {loss/all:.4f} loss, " + "{correct/all:-5.1f}% correct, " ).format( epoch_ndx, mode_str, **metrics_dict, ) ) log.info( ("E{} {:8} {loss/neg:.4f} loss, " + "{correct/neg:-5.1f}% correct ({neg_correct:} of {neg_count:})" ).format( epoch_ndx, mode_str + '_neg', neg_correct=neg_correct, neg_count=neg_count, **metrics_dict, ) ) log.info( ("E{} {:8} {loss/pos:.4f} loss, " + "{correct/pos:-5.1f}% correct ({pos_correct:} of {pos_count:})" ).format( epoch_ndx, mode_str + '_pos', pos_correct=pos_correct, pos_count=pos_count, **metrics_dict, ) ) writer = getattr(self, mode_str + '_writer') for key, value in metrics_dict.items(): writer.add_scalar(key, value, self.totalTrainingSamples_count) writer.add_pr_curve( 'pr', metrics_t[METRICS_LABEL_NDX], metrics_t[METRICS_PRED_NDX], self.totalTrainingSamples_count, ) bins = [x/50.0 for x in range(51)] negHist_mask = negLabel_mask & (metrics_t[METRICS_PRED_NDX] > 0.01) posHist_mask = posLabel_mask & (metrics_t[METRICS_PRED_NDX] < 0.99) if negHist_mask.any(): writer.add_histogram( 'is_neg', metrics_t[METRICS_PRED_NDX, negHist_mask], self.totalTrainingSamples_count, bins=bins, ) if posHist_mask.any(): writer.add_histogram( 'is_pos', metrics_t[METRICS_PRED_NDX, posHist_mask], self.totalTrainingSamples_count, bins=bins, ) # score = 1 \ # + metrics_dict['pr/f1_score'] \ # - metrics_dict['loss/mal'] * 0.01 \ # - metrics_dict['loss/all'] * 0.0001 # # return score # def logModelMetrics(self, model): # writer = getattr(self, 'trn_writer') # # model = getattr(model, 'module', model) # # for name, param in model.named_parameters(): # if param.requires_grad: # min_data = float(param.data.min()) # max_data = float(param.data.max()) # max_extent = max(abs(min_data), abs(max_data)) # # # bins = [x/50*max_extent for x in range(-50, 51)] # # try: # writer.add_histogram( # name.rsplit('.', 1)[-1] + '/' + name, # param.data.cpu().numpy(), # # metrics_a[METRICS_PRED_NDX, negHist_mask], # self.totalTrainingSamples_count, # # bins=bins, # ) # except Exception as e: # log.error([min_data, max_data]) # raise if __name__ == '__main__': LunaTrainingApp().main()