fixed global_step wrong calculation and added tuning HP notebook

Author: IvanLauLinTiong

finetuning_model.ipynb

@@ -306,10 +306,10 @@
     "                if writer:\n",
     "                    writer.add_scalar(\"train_loss\", \n",
     "                                      running_losses/log_every_n_batches,\n",
-    "                                      global_step=epoch*len(train_loader)*batch_idx)\n",
+    "                                      global_step=epoch*len(train_loader)+batch_idx)\n",
     "                    writer.add_scalar(\"train_accuracy\", \n",
     "                                      running_corrects/total,\n",
-    "                                      global_step=epoch*len(train_loader)*batch_idx)\n",
+    "                                      global_step=epoch*len(train_loader)+batch_idx)\n",
     "                \n",
     "                # reset to zero values for next logging\n",
     "                running_losses = 0.0\n",
@@ -380,10 +380,10 @@
     "                    if writer:\n",
     "                        writer.add_scalar(\"val_loss\", \n",
     "                                          running_losses/log_every_n_batches,\n",
-    "                                          global_step=epoch*len(val_loader)*batch_idx)\n",
+    "                                          global_step=epoch*len(val_loader)+batch_idx)\n",
     "                        writer.add_scalar(\"val_accuracy\", \n",
     "                                          running_corrects/total,\n",
-    "                                          global_step=epoch*len(val_loader)*batch_idx)\n",
+    "                                          global_step=epoch*len(val_loader)+batch_idx)\n",
     "\n",
     "                    # reset to zero values for next logging\n",
     "                    running_losses = 0.0\n",