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fix bug for fp16 + delay_scale_loss_scale + sharding_stage1_overlap #8314

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Apr 24, 2024
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fix bug for fp16 + delay_scale_loss_scale + sharding_stage1_overlap #8314

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1 change: 1 addition & 0 deletions paddlenlp/trainer/trainer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1013,6 +1013,7 @@
self.timers and self.timers("optimizer-step").start()

if self.args.gradient_accumulation_steps > 1 and self._enable_delay_scale_loss():
paddle.device.synchronize()

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不会影响性能吗？

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不会，这块必须不能有overlap。这儿需要有个同步，不然可能出现这个grad还没通讯完就做scale的问题。

for p in model._layers.parameters():
with paddle.no_grad():
if hasattr(p, "main_grad") and p.main_grad is not None:
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