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Improve Error Messaging for Flash Attention 2 on CPU #33655

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Merged
stevhliu merged 1 commit into from
Sep 24, 2024
Merged

Improve Error Messaging for Flash Attention 2 on CPU #33655

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4 changes: 4 additions & 0 deletions src/transformers/modeling_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1698,6 +1698,10 @@ def _check_and_enable_flash_attn_2(
raise ImportError(
f"{preface} you need flash_attn package version to be greater or equal than 2.1.0. Detected version {flash_attention_version}. {install_message}"
)
elif not torch.cuda.is_available():
raise ValueError(
f"{preface} Flash Attention 2 is not available on CPU. Please make sure torch can access a CUDA device."
)
else:
raise ImportError(f"{preface} Flash Attention 2 is not available. {install_message}")
elif torch.version.hip:
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