150 lines
5.6 KiB
Python
150 lines
5.6 KiB
Python
# Copyright 2023-2024 SGLang Team
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ==============================================================================
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import logging
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import uuid
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from typing import Dict, Optional
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from sglang.srt.managers.io_struct import TokenizedGenerateReqInput
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from sglang.srt.managers.schedule_batch import Req
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class SessionReqNode:
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def __init__(self, req, parent=None, childs=None):
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self.req = req
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self.parent = parent
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if parent is not None:
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parent.childs.append(self)
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self.childs = [] if not childs else childs
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def clear_childs(self, req_dict):
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for req_node in self.childs:
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req_node.clear(req_dict)
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self.childs = []
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def clear(self, req_dict):
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for req_node in self.childs:
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req_node.clear(req_dict)
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if self.req.finished_reason is None:
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self.req.to_abort = True
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del req_dict[self.req.rid]
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def abort(self):
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if self.req.finished_reason is None:
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self.req.to_abort = True
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def __str__(self):
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return self._str_helper(self.req.rid)
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def _str_helper(self, prefix=""):
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if len(self.childs) == 0:
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return prefix + "\n"
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else:
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origin_prefix = prefix
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prefix += " -- " + self.childs[0].req.rid
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ret = self.childs[0]._str_helper(prefix)
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for child in self.childs[1:]:
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prefix = " " * len(origin_prefix) + " \- " + child.req.rid
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ret += child._str_helper(prefix)
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return ret
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class Session:
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def __init__(self, capacity_of_str_len: int, session_id: Optional[str] = None):
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self.session_id = session_id if session_id is not None else uuid.uuid4().hex
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self.capacity_of_str_len = capacity_of_str_len
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self.req_nodes: Dict[str, SessionReqNode] = {}
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def create_req(self, req: TokenizedGenerateReqInput, tokenizer):
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assert req.session_params is not None
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session_params = req.session_params
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last_req_node = None
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last_req = None
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abort = False
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if session_params.replace:
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if session_params.rid is None:
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for _, req_node in self.req_nodes.items():
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req_node.clear(self.req_nodes)
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else:
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if session_params.rid not in self.req_nodes:
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abort = True
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else:
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last_req_node = self.req_nodes[session_params.rid]
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last_req_node.abort()
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last_req = last_req_node.req
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last_req_node.clear_childs(self.req_nodes)
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else:
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if session_params.rid is not None:
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if session_params.rid not in self.req_nodes:
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abort = True
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else:
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last_req_node = self.req_nodes[session_params.rid]
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last_req = last_req_node.req
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if not last_req.finished():
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logging.warning(
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"The request in a session is appending to a request that hasn't finished."
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)
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abort = True
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if last_req is not None:
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# trim bos token if it is an append
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if tokenizer is not None and req.input_ids[0] == tokenizer.bos_token_id:
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req.input_ids = req.input_ids[1:]
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input_ids = (
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last_req.origin_input_ids
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+ last_req.output_ids[: last_req.sampling_params.max_new_tokens]
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)
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if session_params.offset and session_params.offset != 0:
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input_ids = input_ids[: session_params.offset] + req.input_ids
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else:
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input_ids += req.input_ids
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input_ids_unpadded = (
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last_req.origin_input_ids_unpadded
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+ last_req.output_ids[: last_req.sampling_params.max_new_tokens]
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)
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if session_params.offset and session_params.offset != 0:
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input_ids_unpadded = (
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input_ids_unpadded[: session_params.offset] + req.input_ids
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)
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else:
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input_ids_unpadded += req.input_ids
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else:
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input_ids = req.input_ids
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input_ids_unpadded = req.input_ids
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new_req = Req(
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rid=req.rid,
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origin_input_text=None,
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origin_input_ids=input_ids,
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origin_input_ids_unpadded=input_ids_unpadded,
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sampling_params=req.sampling_params,
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lora_path=req.lora_path,
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session_id=self.session_id,
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custom_logit_processor=req.custom_logit_processor,
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stream=req.stream,
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return_logprob=req.return_logprob,
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top_logprobs_num=req.top_logprobs_num,
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token_ids_logprob=req.token_ids_logprob,
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)
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if last_req is not None:
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new_req.multimodal_inputs = last_req.mm_inputs
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new_req.tokenizer = tokenizer
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if abort:
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new_req.to_abort = True
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else:
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new_req_node = SessionReqNode(new_req, last_req_node)
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self.req_nodes[req.rid] = new_req_node
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return new_req
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