Add option to switch off bayesian cont loss in bayesian GW (#71)

shimmer/modules/global_workspace.py

@@ -682,6 +682,7 @@ def __init__(
         optim_weight_decay: float = 0.0,
         scheduler_args: SchedulerArgs | None = None,
         learn_logit_scale: bool = False,
+        use_normalized_constrastive: bool = True,
         contrastive_loss: ContrastiveLossType | None = None,
     ) -> None:
         """
@@ -706,6 +707,8 @@ def __init__(
             scheduler_args (`SchedulerArgs | None`): optimization scheduler's arguments
             learn_logit_scale (`bool`): whether to learn the contrastive learning
                 contrastive loss when using the default contrastive loss.
+            use_normalized_constrastive (`bool`): whether to use the normalized cont
+                loss by the precision coefs
             contrastive_loss (`ContrastiveLossType | None`): a contrastive loss
                 function used for alignment. `learn_logit_scale` will not affect custom
                 contrastive losses.
@@ -733,6 +736,7 @@ def __init__(
             domain_mods,
             loss_coefs,
             contrastive_loss,
+            use_normalized_constrastive,
         )
 
         super().__init__(

shimmer/modules/losses.py

@@ -316,10 +316,13 @@ def contrastive_loss_bayesian(
                 loss_output = contrastive_fn(
                     z1 * coef[0] * coef[1], z2 * coef[0] * coef[1]
                 )
+                loss_output_no_norm = contrastive_fn(z1, z2)
+
                 losses[loss_name] = loss_output.loss
                 metrics.update(
                     {f"{loss_name}_{k}": v for k, v in loss_output.metrics.items()}
                 )
+                metrics[f"unnorm_{loss_name}"] = loss_output_no_norm.loss
 
     losses["contrastives"] = torch.stack(list(losses.values()), dim=0).mean()
     losses.update(metrics)
@@ -763,6 +766,7 @@ def __init__(
         domain_mods: dict[str, DomainModule],
         loss_coefs: BroadcastLossCoefs,
         contrastive_fn: ContrastiveLossType,
+        use_normalized_constrastive: bool = True,
     ):
         """
         Loss module with uncertainty prediction to use with the GlobalWorkspaceBayesian
@@ -775,6 +779,8 @@ def __init__(
             loss_coefs (`BroadcastLossCoefs`): loss coefficients
             contrastive_fn (`ContrastiveLossType`): the contrastive function
                 to use in contrastive loss
+            use_normalized_constrastive (`bool`): whether to use the normalized cont
+                loss by the precision coefs
         """
         super().__init__()
 
@@ -795,6 +801,8 @@ def __init__(
         Contrastive loss to use.
         """
 
+        self.use_normalized_constrastive = use_normalized_constrastive
+
     def contrastive_loss(
         self, latent_domains: LatentsDomainGroupsT
     ) -> dict[str, torch.Tensor]:
@@ -807,9 +815,11 @@ def contrastive_loss(
         Returns:
             `dict[str, torch.Tensor]`: a dict of metrics.
         """
-        return contrastive_loss_bayesian(
-            self.gw_mod, latent_domains, self.contrastive_fn
-        )
+        if self.use_normalized_constrastive:
+            return contrastive_loss_bayesian(
+                self.gw_mod, latent_domains, self.contrastive_fn
+            )
+        return contrastive_loss(self.gw_mod, latent_domains, self.contrastive_fn)
 
     def broadcast_loss(
         self, latent_domains: LatentsDomainGroupsT