remove vocab_size args

colossalai/shardformer/layer/loss.py

@@ -15,15 +15,7 @@ class DistCrossEntropy(Function):
     """
 
     @staticmethod
-    def forward(
-        ctx,
-        vocab_logits: torch.Tensor,
-        target: torch.Tensor,
-        ignore_index: int,
-        process_group: ProcessGroup,
-        vocab_size: int,
-        dtype=torch.float32,
-    ):
+    def forward(ctx, vocab_logits: torch.Tensor, target: torch.Tensor, ignore_index: int, process_group: ProcessGroup):
         r"""
         Calculate the cross entropy loss before gather, the origin loss function is as follows:
         loss = -log(exp(x[class])/sum(exp(x[i]))
@@ -35,7 +27,7 @@ class DistCrossEntropy(Function):
         Args:
             vocab_logits (:class:`torch.Tensor`): The logits of the vocabulary, shape is
               [batch_size, seq_len, vocab_size]
-            target (:class:`torch.Tensor`): The labels of the vocabulary, shape is
+            labels (:class:`torch.Tensor`): The labels of the vocabulary, shape is
               [batch_size, seq_len]
 
         Returns:
@@ -49,21 +41,15 @@ class DistCrossEntropy(Function):
         vocab_logits = vocab_logits - logits_max.unsqueeze(dim=-1)
 
         # mask the target in the local device
+        partition_vocab_size = vocab_logits.size()[-1]
         rank = dist.get_rank(group=process_group)
         world_size = dist.get_world_size(group=process_group)
-        if vocab_size == None:
-            partition_vocab_size = vocab_logits.size()[-1]
         global_vocab_size = partition_vocab_size * world_size
-        else:
-            global_vocab_size = vocab_size
-            partition_vocab_size = global_vocab_size // world_size
 
         # [down, up) => false, other device and -100 => true
         delta = (global_vocab_size + world_size - 1) // world_size
         down_threshold = rank * delta
         up_threshold = down_threshold + delta
-        if up_threshold > global_vocab_size:
-            up_threshold = global_vocab_size
         mask = (target < down_threshold) | (target >= up_threshold)
         masked_target = target.clone() - down_threshold
         masked_target[mask] = 0
@@ -71,8 +57,7 @@ class DistCrossEntropy(Function):
         # reshape the logits and target
         # reshape the vocab_logits to [bath_size * seq_len, vocab_size]
         # reshape the labels to [bath_size * seq_len]
-        self_vocab_size = vocab_logits.size()[-1]
-        logits_2d = vocab_logits.view(-1, self_vocab_size)
+        logits_2d = vocab_logits.view(-1, partition_vocab_size)
         masked_target_1d = masked_target.view(-1)
 
         # extract the x[class] and set the x[other device] to zero
@@ -87,7 +72,7 @@ class DistCrossEntropy(Function):
         dist.all_reduce(pred_logits, op=dist.ReduceOp.SUM, group=process_group)
         exp_logits = vocab_logits
         torch.exp(vocab_logits, out=exp_logits)
-        sum_exp_logits = torch.sum(exp_logits, dim=-1, dtype=torch.float32)
+        sum_exp_logits = torch.sum(exp_logits, dim=-1)
         dist.all_reduce(sum_exp_logits, op=dist.ReduceOp.SUM, group=process_group)
 
         # calculate the loss
@@ -98,10 +83,9 @@ class DistCrossEntropy(Function):
         loss = torch.sum(loss).div_(num_non_zero)
 
         # calculate the softmax
-        exp_logits = exp_logits.div(sum_exp_logits.unsqueeze(dim=-1)).to(dtype)
+        exp_logits.div_(sum_exp_logits.unsqueeze(dim=-1))
         exp_logits[target == ignore_index] = 0.0
         ctx.save_for_backward(exp_logits, mask, masked_target_1d)
-        ctx.dtype = dtype
 
         return loss
 
@@ -116,19 +100,14 @@ class DistCrossEntropy(Function):
         partion_vocab_size = grad_logits.shape[-1]
         grad_logits_2d = grad_logits.view(-1, partion_vocab_size)
 
-        update = 1.0 - mask.view(-1).float().to(ctx.dtype)
+        update = 1.0 - mask.view(-1).float()
         grad_logits_2d[torch.arange(0, grad_logits_2d.shape[0]), masked_target_1d] -= update
 
         grad_logits.mul_(grad_output.unsqueeze(dim=-1))
-        return grad_logits, None, None, None, None, None
+        return grad_logits, None, None, None
 
 
 def cross_entropy_1d(
-    vocab_logits: torch.Tensor,
-    labels: torch.Tensor,
-    ignore_index: int = -100,
-    process_group: ProcessGroup = None,
-    vocab_size: int = None,
-    dtype: torch.dtype = None,
+    vocab_logits: torch.Tensor, labels: torch.Tensor, ignore_index: int = -100, process_group: ProcessGroup = None
 ) -> torch.Tensor:
-    return DistCrossEntropy.apply(vocab_logits, labels, ignore_index, process_group, vocab_size, dtype)
+    return DistCrossEntropy.apply(vocab_logits, labels, ignore_index, process_group)

colossalai/shardformer/modeling/llama.py

@@ -320,8 +320,6 @@ class LlamaPipelineForwards:
                         shift_logits,
                         shift_labels,
                         process_group=shard_config.tensor_parallel_process_group,
-                        vocab_size=self.lm_head.out_features,
-                        dtype=self.model.dtype,
                     )
                 else:
                     shift_logits = shift_logits.view(-1, self.config.vocab_size)