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[Misc] Fix docstring of get_attn_backend (#5271)

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Woosuk Kwon 2024-06-05 09:18:59 -07:00 committed by GitHub
parent 41ca62cf03
commit c65146e75e
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1 changed files with 2 additions and 3 deletions
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vllm/attention/selector.py
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@ -31,15 +31,14 @@ def get_attn_backend(
block_size: int,
is_blocksparse: bool = False,
) -> Type[AttentionBackend]:
"""Selects which attention backend to use and lazily imports it."""
if is_blocksparse:
logger.info("Using BlocksparseFlashAttention backend.")
from vllm.attention.backends.blocksparse_attn import (
BlocksparseFlashAttentionBackend)
return BlocksparseFlashAttentionBackend
"""Determine which attention backend to use and only import
the selected backend module.
"""
backend = which_attn_to_use(num_heads, head_size, num_kv_heads,
sliding_window, dtype, kv_cache_dtype,
block_size)