Update IWSLT configuration for transformer

examples/translation/README.md

@@ -36,6 +36,31 @@ $ python generate.py data-bin/iwslt14.tokenized.de-en \
 
 ```
 
+To train transformer model on IWSLT'14 German to English:
+```
+# Preparation steps are the same as for fconv model.
+
+# Train the model (better for a single GPU setup):
+$ mkdir -p checkpoints/transformer
+$ CUDA_VISIBLE_DEVICES=0 python train.py data-bin/iwslt14.tokenized.de-en \
+  -a transformer_iwslt_de_en --optimizer adam --lr 0.0005 -s de -t en \
+  --label-smoothing 0.1 --dropout 0.3 --max-tokens 4000 \
+  --min-lr '1e-09' --lr-scheduler inverse_sqrt --weight-decay 0.0001 \
+  --criterion label_smoothed_cross_entropy --max-update 50000 \
+  --warmup-updates 4000 --warmup-init-lr '1e-07' \
+  --adam-betas '(0.9, 0.98)' --save-dir checkpoints/transformer
+
+# Average 10 latest checkpoints:
+$ python scripts/average_checkpoints.py --inputs checkpoints/transformer \
+   --num-epoch-checkpoints 10 --output checkpoints/transformer/model.pt
+
+# Generate:
+$ python generate.py data-bin/iwslt14.tokenized.de-en \
+  --path checkpoints/transformer/model.pt \
+  --batch-size 128 --beam 5 --remove-bpe
+
+```
+
 
 ### prepare-wmt14en2de.sh
 

fairseq/models/transformer.py

@@ -588,14 +588,14 @@ def base_architecture(args):
 
 @register_model_architecture('transformer', 'transformer_iwslt_de_en')
 def transformer_iwslt_de_en(args):
-    args.encoder_embed_dim = getattr(args, 'encoder_embed_dim', 256)
-    args.encoder_ffn_embed_dim = getattr(args, 'encoder_ffn_embed_dim', 512)
+    args.encoder_embed_dim = getattr(args, 'encoder_embed_dim', 512)
+    args.encoder_ffn_embed_dim = getattr(args, 'encoder_ffn_embed_dim', 1024)
     args.encoder_attention_heads = getattr(args, 'encoder_attention_heads', 4)
-    args.encoder_layers = getattr(args, 'encoder_layers', 3)
-    args.decoder_embed_dim = getattr(args, 'decoder_embed_dim', 256)
-    args.decoder_ffn_embed_dim = getattr(args, 'decoder_ffn_embed_dim', 512)
+    args.encoder_layers = getattr(args, 'encoder_layers', 6)
+    args.decoder_embed_dim = getattr(args, 'decoder_embed_dim', 512)
+    args.decoder_ffn_embed_dim = getattr(args, 'decoder_ffn_embed_dim', 1024)
     args.decoder_attention_heads = getattr(args, 'decoder_attention_heads', 4)
-    args.decoder_layers = getattr(args, 'decoder_layers', 3)
+    args.decoder_layers = getattr(args, 'decoder_layers', 6)
     base_architecture(args)