Disable jitter noise during evaluation in SwitchTransformers (#28077)

* Disable jitter noise during evaluation

* Update outdated configuration information

* Formatting

* Add new line

src/transformers/models/gptsan_japanese/modeling_gptsan_japanese.py

@@ -187,7 +187,7 @@ class GPTSanJapaneseTop1Router(nn.Module):
         self.input_dtype = hidden_states.dtype
         hidden_states = hidden_states.to(self.dtype)
 
-        if self.jitter_noise > 0:
+        if self.training and self.jitter_noise > 0:
             # Multiply the token inputs by the uniform distribution - adding some noise
             hidden_states *= torch.empty_like(hidden_states).uniform_(1.0 - self.jitter_noise, 1.0 + self.jitter_noise)
 

src/transformers/models/switch_transformers/configuration_switch_transformers.py

@@ -38,7 +38,7 @@ class SwitchTransformersConfig(PretrainedConfig):
         vocab_size (`int`, *optional*, defaults to 32128):
             Vocabulary size of the SwitchTransformers model. Defines the number of different tokens that can be
             represented by the `inputs_ids` passed when calling [`SwitchTransformersModel`].
-        d_model (`int`, *optional*, defaults to 512):
+        d_model (`int`, *optional*, defaults to 768):
             Size of the encoder layers and the pooler layer.
         d_kv (`int`, *optional*, defaults to 64):
             Size of the key, query, value projections per attention head. `d_kv` has to be equal to `d_model //
@@ -50,21 +50,19 @@ class SwitchTransformersConfig(PretrainedConfig):
             Transformer.
         num_layers (`int`, *optional*, defaults to 12):
             Number of dense hidden layers in the Transformer encoder layer.
-        num_sparse_encoder_layers (`int`, *optional*, defaults to 6):
+        num_sparse_encoder_layers (`int`, *optional*, defaults to 3):
             Number of sparse (MoE) dense hidden layers in the Transformer encoder layer.
         num_decoder_layers (`int`, *optional*, defaults to 12):
             Number of hidden layers in the Transformer decoder. Will use the same value as `num_layers` if not set.
-        num_sparse_decoder_layers (`int`, *optional*, defaults to 12):
+        num_sparse_decoder_layers (`int`, *optional*, defaults to 3):
             Number of sparse (MoE) dense hidden layers in the Transformer decoder layer.
-        num_heads (`int`, *optional*, defaults to 8):
+        num_heads (`int`, *optional*, defaults to 12):
             Number of attention heads for each attention layer in the Transformer encoder.
         num_experts (`int`, *optional*, defaults to 8):
             Number of experts for each SwitchTransformer layer.
-        router_type (`str`, *optional*, defaults to `"tokens_masked"`):
-            Router type - choose between `"tokens_masked", `"tokens_scatter"` and `"experts_masked"`.
-        router_bias (`bool`, *optional*, defaults to `True`):
+        router_bias (`bool`, *optional*, defaults to `False`):
             Whether to add a bias to the router.
-        router_jitter_noise (`float`, *optional*, defaults to 0.1):
+        router_jitter_noise (`float`, *optional*, defaults to 0.01):
             Amount of noise to add to the router.
         router_dtype (`str`, *optional*, default to `"float32"`):
             The `dtype` used for the routers. It is preferable to keep the `dtype` to `"float32"` as specified in the
@@ -83,10 +81,10 @@ class SwitchTransformersConfig(PretrainedConfig):
             The z loss factor for the total loss.
         router_aux_loss_coef (`float`, *optional*, defaults to 0.001):
             The aux loss factor for the total loss.
-        initializer_factor (`float`, *optional*, defaults to 1):
+        initializer_factor (`float`, *optional*, defaults to 1.0):
             A factor for initializing all weight matrices (should be kept to 1, used internally for initialization
             testing).
-        feed_forward_proj (`string`, *optional*, defaults to `"relu"`):
+        dense_act_fn (`string`, *optional*, defaults to `"relu"`):
             Type of feed forward layer to be used. Should be one of `"relu"` or `"gated-gelu"`. SwitchTransformersv1.1
             uses the `"gated-gelu"` feed forward projection. Original SwitchTransformers uses `"relu"`.
         add_router_probs (`bool`, *optional*, defaults to `False`):

src/transformers/models/switch_transformers/modeling_switch_transformers.py

@@ -168,7 +168,7 @@ class SwitchTransformersTop1Router(nn.Module):
         self.input_dtype = hidden_states.dtype
         hidden_states = hidden_states.to(self.dtype)
 
-        if self.jitter_noise > 0:
+        if self.training and self.jitter_noise > 0:
             # Multiply the token inputs by the uniform distribution - adding some noise
             hidden_states *= torch.empty_like(hidden_states).uniform_(1.0 - self.jitter_noise, 1.0 + self.jitter_noise)