add first_val_step to mcore scheduler (#8150)

* add first_val_step for mcore schedules Signed-off-by: jiemingz <[email protected]> * fix if non fp8 Signed-off-by: jiemingz <[email protected]> * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * add mcore installation to ci Signed-off-by: jiemingz <[email protected]> * Update Jenkinsfile Signed-off-by: JimmyZhang12 <[email protected]> * Fix SFT missing arg Signed-off-by: jiemingz <[email protected]> --------- Signed-off-by: jiemingz <[email protected]> Signed-off-by: JimmyZhang12 <[email protected]> Co-authored-by: jiemingz <[email protected]> Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Eric Harper <[email protected]>
NVIDIA · Jan 25, 2024 · f25be00 · f25be00
1 parent 6143f6b
commit f25be00
Show file tree

Hide file tree

Showing 3 changed files with 25 additions and 12 deletions.
diff --git a/Jenkinsfile b/Jenkinsfile
@@ -81,14 +81,14 @@ pipeline {
 
     // pip package should be working with main, if not we can update the commit here
     // until the pip package is updated
-    // stage('Megatron Core installation') {
-    //   steps {
-    //      sh 'git clone https://github.com/NVIDIA/Megatron-LM.git && \
-    //          cd Megatron-LM && \
-    //          git checkout 973330e9c3681604703bf1eb6b5a265d1b9b9b38 && \
-    //          pip install .'
-    //   }
-    // }
+    stage('Megatron Core installation') {
+      steps {
+         sh 'git clone https://github.com/NVIDIA/Megatron-LM.git && \
+             cd Megatron-LM && \
+             git checkout bed60a881f4b238b1c14b6c6a64997cc636e77b6 && \
+             pip install .'
+      }
+    }
 
     stage('PyTorch Lightning version') {
       steps {
@@ -5268,4 +5268,4 @@ assert_frame_equal(training_curve, gt_curve, rtol=1e-3, atol=1e-3)"'''
       cleanWs()
     }
   }
-}
+}
diff --git a/nemo/collections/nlp/models/language_modeling/megatron_gpt_model.py b/nemo/collections/nlp/models/language_modeling/megatron_gpt_model.py
@@ -227,6 +227,8 @@ def __init__(self, cfg: DictConfig, trainer: Trainer):
 
         self.mcore_gpt = cfg.get('mcore_gpt', False)
         self.spec_name = cfg.get('name', '')
+        if cfg.get('fp8', False):
+            self.prev_step_training = True
 
         self.rampup_batch_size = self.cfg.get('rampup_batch_size', None)
         if self.rampup_batch_size:
@@ -498,7 +500,7 @@ def forward(self, tokens, text_position_ids, attention_mask, labels):
         output_tensor = self.model(tokens, text_position_ids, attention_mask, labels=labels)
         return output_tensor
 
-    def fwd_bwd_step(self, dataloader_iter, batch_idx, forward_only):
+    def fwd_bwd_step(self, dataloader_iter, batch_idx, forward_only, first_val_step=None):
 
         # handle asynchronous grad reduction
         no_sync_func = None
@@ -528,6 +530,7 @@ def fwd_bwd_step(self, dataloader_iter, batch_idx, forward_only):
             forward_only=forward_only,
             seq_length=self.cfg.encoder_seq_length,
             micro_batch_size=self.cfg.micro_batch_size,
+            first_val_step=first_val_step,
         )
 
         # only the last stages of the pipeline return losses
@@ -622,6 +625,9 @@ def training_step(self, dataloader_iter, batch_idx):
 
         loss_mean = self.fwd_bwd_step(dataloader_iter, batch_idx, False)
 
+        if self.cfg.get('fp8', False):
+            self.prev_step_training = self.training
+
         # when using sequence parallelism, the sequence parallel layernorm grads must be all-reduced
         if self.cfg.get('tensor_model_parallel_size', 1) > 1 and self.cfg.get('sequence_parallel', False):
             self.allreduce_sequence_parallel_gradients()
@@ -1047,7 +1053,13 @@ def validation_step(self, dataloader_iter, batch_idx):
             for model_module in self.model:
                 model_module.eval()
 
-        loss = self.fwd_bwd_step(dataloader_iter, batch_idx, True)
+        if self.cfg.get('fp8', False):
+            first_val_step = self.prev_step_training and not self.training
+            self.prev_step_training = self.training
+        else:
+            first_val_step = None
+
+        loss = self.fwd_bwd_step(dataloader_iter, batch_idx, True, first_val_step)
 
         if isinstance(self.model, list):
             for model_module in self.model:

diff --git a/nemo/collections/nlp/models/language_modeling/megatron_gpt_sft_model.py b/nemo/collections/nlp/models/language_modeling/megatron_gpt_sft_model.py
@@ -320,7 +320,7 @@ def _determine_log_key(self, data_config, dataloader_idx, metric_name, mode):
         else:
             return base_key + f"dataloader{dataloader_idx}"
 
-    def fwd_bwd_step(self, dataloader_iter, batch_idx, forward_only):
+    def fwd_bwd_step(self, dataloader_iter, batch_idx, forward_only, first_val_step=None):
         batch = next(dataloader_iter)
 
         log_token_counts = self.cfg.get('log_token_counts', False)
@@ -360,6 +360,7 @@ def fwd_bwd_step(self, dataloader_iter, batch_idx, forward_only):
             forward_only=forward_only,
             seq_length=seq_length,
             micro_batch_size=get_micro_batch_size(),
+            first_val_step=first_val_step,
         )
 
         # only the last stages of the pipeline return losses