114 lines
2.8 KiB
Python
114 lines
2.8 KiB
Python
import enum
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from abc import ABC, abstractmethod
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from collections.abc import Sequence as GenericSequence
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from typing import Dict, List
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from vllm.sequence import Sequence, SequenceGroup
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class AllocStatus(enum.Enum):
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"""Result for BlockSpaceManager.can_allocate
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1. Ok: seq_group can be allocated now.
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2. Later: seq_group cannot be allocated.
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The capacity of allocator is larger than seq_group required.
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3. Never: seq_group can never be allocated.
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The seq_group is too large to allocated in GPU.
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"""
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OK = enum.auto()
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LATER = enum.auto()
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NEVER = enum.auto()
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class BlockSpaceManager(ABC):
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@staticmethod
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def get_block_space_manager_class(version: str):
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version = version.lower()
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if version == "v1":
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from vllm.core.block_manager_v1 import BlockSpaceManagerV1
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return BlockSpaceManagerV1
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if version == "v2":
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from vllm.core.block_manager_v2 import BlockSpaceManagerV2
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return BlockSpaceManagerV2
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raise ValueError(f"Unknown version {version=}")
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@abstractmethod
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def can_allocate(self, seq_group: SequenceGroup) -> AllocStatus:
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pass
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@abstractmethod
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def allocate(self, seq_group: SequenceGroup) -> None:
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pass
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@abstractmethod
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def can_append_slots(self, seq_group: SequenceGroup,
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num_lookahead_slots: int) -> bool:
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pass
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@abstractmethod
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def append_slots(
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self,
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seq: Sequence,
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num_lookahead_slots: int,
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) -> Dict[int, List[int]]:
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pass
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@abstractmethod
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def fork(self, parent_seq: Sequence, child_seq: Sequence) -> None:
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pass
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@abstractmethod
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def can_swap_in(self, seq_group: SequenceGroup,
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num_lookahead_slots: int) -> bool:
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pass
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@abstractmethod
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def swap_in(self, seq_group: SequenceGroup,
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num_lookahead_slots: int) -> Dict[int, int]:
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pass
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@abstractmethod
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def can_swap_out(self, seq_group: SequenceGroup) -> bool:
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pass
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@abstractmethod
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def swap_out(self, seq_group: SequenceGroup) -> Dict[int, int]:
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pass
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@abstractmethod
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def free(self, seq: Sequence) -> None:
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pass
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@abstractmethod
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def get_block_table(self, seq: Sequence) -> List[int]:
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pass
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@abstractmethod
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def get_num_free_gpu_blocks(self) -> int:
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pass
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@abstractmethod
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def get_num_free_cpu_blocks(self) -> int:
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pass
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@abstractmethod
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def access_all_blocks_in_seq(
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self,
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seq: Sequence,
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access_time: float,
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) -> None:
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pass
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@abstractmethod
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def get_common_computed_block_ids(
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self, seqs: List[Sequence]) -> GenericSequence[int]:
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pass
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@abstractmethod
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def mark_blocks_as_computed(self, seq_group: SequenceGroup):
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pass
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