clear documentation about evaluating a model
Summary: Pull Request resolved:
@@ -58,7 +58,12 @@ For most models, CPU training is not supported.
(Note that we applied the [linear learning rate scaling rule](https://arxiv.org/abs/1706.02677)
when changing the batch size.)
-To evaluate a model's performance, use `train_net.py --eval-only`.
+To evaluate this model's performance, use
+```
+python tools/train_net.py \
+ --config-file configs/COCO-InstanceSegmentation/mask_rcnn_R_50_FPN_1x.yaml \
+ MODEL.WEIGHTS /path/to/checkpoint_file
+```
For more options, see `python tools/train_net.py -h`.
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