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Fix warmup LR being zero at step 0 #1379

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Fix warmup LR being zero at step 0 #1379

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2 changes: 1 addition & 1 deletion megatron/learning_rates.py
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Original file line number Diff line number Diff line change
Expand Up @@ -67,7 +67,7 @@ def get_lr(self):
num_iters_ = self.num_iters
# Warmup.
if self.warmup_iter > 0 and self.num_iters <= self.warmup_iter:
return float(self.start_lr) * num_iters_ / self.warmup_iter
return float(self.start_lr) * max(1, num_iters_) / self.warmup_iter

num_iters_ = num_iters_ - self.warmup_iter
if self.decay_style == "linear":
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