Merge remote-tracking branch 'origin/master'

train.py

@@ -114,6 +114,12 @@ def train(hyp, tb_writer, opt, device):
     print('Optimizer groups: %g .bias, %g conv.weight, %g other' % (len(pg2), len(pg1), len(pg0)))
     del pg0, pg1, pg2
     
+    # Scheduler https://arxiv.org/pdf/1812.01187.pdf
+    lf = lambda x: (((1 + math.cos(x * math.pi / epochs)) / 2) ** 1.0) * 0.8 + 0.2  # cosine
+    scheduler = lr_scheduler.LambdaLR(optimizer, lr_lambda=lf)
+    # https://discuss.pytorch.org/t/a-problem-occured-when-resuming-an-optimizer/28822
+    # plot_lr_scheduler(optimizer, scheduler, epochs)
+
     # Load Model
     with torch_distributed_zero_first(rank):
         google_utils.attempt_download(weights)
@@ -158,12 +164,6 @@ def train(hyp, tb_writer, opt, device):
     if mixed_precision:
         model, optimizer = amp.initialize(model, optimizer, opt_level='O1', verbosity=0)
 
-    # Scheduler https://arxiv.org/pdf/1812.01187.pdf
-    lf = lambda x: (((1 + math.cos(x * math.pi / epochs)) / 2) ** 1.0) * 0.8 + 0.2  # cosine
-    scheduler = lr_scheduler.LambdaLR(optimizer, lr_lambda=lf)
-    # https://discuss.pytorch.org/t/a-problem-occured-when-resuming-an-optimizer/28822
-    # plot_lr_scheduler(optimizer, scheduler, epochs)
-
     # DP mode
     if device.type != 'cpu' and rank == -1 and torch.cuda.device_count() > 1:
         model = torch.nn.DataParallel(model)