42 lines
1.1 KiB
Python
42 lines
1.1 KiB
Python
"""Token blocks."""
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from typing import List
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from vllm.utils import Device
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DEFAULT_LAST_ACCESSED_TIME = -1
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class PhysicalTokenBlock:
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"""Represents the state of a block in the KV cache."""
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def __init__(
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self,
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device: Device,
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block_number: int,
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block_size: int,
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block_hash: int,
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num_hashed_tokens: int,
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) -> None:
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self.device = device
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self.block_number = block_number
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self.block_size = block_size
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self.block_hash = block_hash
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self.num_hashed_tokens = num_hashed_tokens
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self.ref_count = 0
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self.last_accessed = DEFAULT_LAST_ACCESSED_TIME
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self.computed = False
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def __repr__(self) -> str:
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return (f'PhysicalTokenBlock(device={self.device}, '
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f'block_number={self.block_number}, '
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f'num_hashed_tokens={self.num_hashed_tokens}, '
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f'ref_count={self.ref_count}, '
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f'last_accessed={self.last_accessed}, '
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f'computed={self.computed})')
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# Mapping: logical block number -> physical block.
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BlockTable = List[PhysicalTokenBlock]
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