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Fix trainer dataloader slow loading issue (#3219)

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* Fix trainer dataloader handling in src/axolotl/core/trainers/base.py

* update comment to reflect torch version

---------

Co-authored-by: Wing Lian <wing.lian@gmail.com>
This commit is contained in:
Qingyang Wu
2025-10-22 07:22:14 -07:00
committed by GitHub
parent 613bcf90e5
commit 3750fdcf79
2 changed files with 13 additions and 12 deletions
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23
src/axolotl/core/trainers/base.py
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@@ -225,17 +225,6 @@ class AxolotlTrainer(
data_collator = self.data_collator if is_training else self.eval_data_collator
if dataset.column_names and "length" in dataset.column_names:
dataset = dataset.remove_columns(["length"])
if (
dataset.column_names
and "position_ids" in dataset.column_names
and "attention_mask" in dataset.column_names
and self.args.sample_packing
and self.args.sample_packing_drop_attention_mask
):
dataset = dataset.remove_columns(["attention_mask"])
if isinstance(dataset, datasets.Dataset):
if is_training:
if not self.args.sample_packing or self.args.pretraining:
@@ -294,6 +283,18 @@ class AxolotlTrainer(
):
self.accelerator.even_batches = False
if dataset.column_names and "length" in dataset.column_names:
dataset = dataset.remove_columns(["length"])
if (
dataset.column_names
and "position_ids" in dataset.column_names
and "attention_mask" in dataset.column_names
and self.args.sample_packing
and self.args.sample_packing_drop_attention_mask
):
dataset = dataset.remove_columns(["attention_mask"])
dataloader = DataLoader(dataset, **dataloader_params)
# Accelerator.free_memory() will destroy the references, so