mirror of
https://git.datalinker.icu/vllm-project/vllm.git
synced 2026-04-10 19:37:04 +08:00
139 lines
4.7 KiB
Python
139 lines
4.7 KiB
Python
# SPDX-License-Identifier: Apache-2.0
|
|
|
|
import asyncio
|
|
import os
|
|
|
|
import msgspec
|
|
import zmq
|
|
import zmq.asyncio
|
|
|
|
from vllm.disaggregated.protocol import (PDAbortRequest, PDGenerationRequest,
|
|
PDGenerationResponse, PDRequestType)
|
|
from vllm.engine.protocol import EngineClient
|
|
from vllm.logger import init_logger
|
|
|
|
logger = init_logger(__name__)
|
|
|
|
|
|
class PDWorker:
|
|
|
|
def __init__(
|
|
self,
|
|
engine: EngineClient,
|
|
worker_addr: str,
|
|
client_addr: str,
|
|
):
|
|
"""
|
|
PDWorker
|
|
* Wrapper around AsyncLLM to handle converting PRRequests
|
|
to PDResponse and sending back to the PDClient.
|
|
* Leverages ZMQ for communication with PDClient. We may
|
|
expand this in the future.
|
|
"""
|
|
# Engine.
|
|
self.engine = engine
|
|
|
|
# ZMQ IPC.
|
|
self.worker_addr = worker_addr
|
|
self.client_addr = client_addr
|
|
self.ctx = zmq.asyncio.Context()
|
|
self.from_client = self.ctx.socket(zmq.constants.PULL)
|
|
self.from_client.connect(f"ipc://{self.worker_addr}")
|
|
self.to_client = self.ctx.socket(zmq.constants.PUSH)
|
|
self.to_client.connect(f"ipc://{self.client_addr}")
|
|
self.decode_generation = msgspec.msgpack.Decoder(PDGenerationRequest)
|
|
self.decode_abort = msgspec.msgpack.Decoder(PDAbortRequest)
|
|
self.encoder = msgspec.msgpack.Encoder()
|
|
|
|
# Active Requests.
|
|
self.running_requests: set[asyncio.Task] = set()
|
|
|
|
def shutdown(self):
|
|
if hasattr(self, "ctx"):
|
|
self.ctx.destroy()
|
|
|
|
if hasattr(self, "running_requests"):
|
|
for running_request in self.running_requests:
|
|
running_request.cancel()
|
|
|
|
if hasattr(self, "client_addr"):
|
|
ipc_paths = [self.worker_addr, self.client_addr]
|
|
for ipc_path in ipc_paths:
|
|
socket_path = ipc_path.replace("ipc://", "")
|
|
if os.path.exists(socket_path):
|
|
os.remove(socket_path)
|
|
|
|
async def run_busy_loop(self):
|
|
"""
|
|
main loop:
|
|
1) wait for a request from the PDClient
|
|
2) handle the request
|
|
"""
|
|
logger.info("PDWorker is ready To handle requests.")
|
|
|
|
while True:
|
|
# 1) Get request from the Connector.
|
|
req_type, req_data = await self.from_client.recv_multipart()
|
|
|
|
# 2) Handle the request.
|
|
await self._handle_request(req_type, req_data)
|
|
|
|
async def _handle_request(self, req_type: bytes, req_data: bytes):
|
|
"""
|
|
request handler:
|
|
1) parse the request type
|
|
2) call the appropriate handler for the request type
|
|
"""
|
|
if req_type == PDRequestType.GENERATION:
|
|
req = self.decode_generation(req_data)
|
|
await self._generation_handler(req)
|
|
elif req_type == PDRequestType.ABORT:
|
|
req = self.decode_abort(req_data)
|
|
await self._abort_handler(req)
|
|
|
|
async def _generation_handler(self, req: PDGenerationRequest):
|
|
"""
|
|
Handle a PDGenerationRequest by launching a task.
|
|
"""
|
|
task = asyncio.create_task(self._generate(req))
|
|
self.running_requests.add(task)
|
|
task.add_done_callback(self.running_requests.discard)
|
|
|
|
async def _abort_handler(self, req: PDGenerationRequest):
|
|
"""
|
|
Handle a PDAbortRequest by cancelling the running task.
|
|
The _generate coro aborts in the Engine.
|
|
"""
|
|
# Convert running_requests set() into a dict(), keyed
|
|
# by request_id. Cancel the task when an abort comes in.
|
|
# Then update the _generate coroutine to handle a
|
|
# cancel error by aborting in the Engine.
|
|
pass
|
|
|
|
async def _generate(self, req: PDGenerationRequest):
|
|
"""
|
|
Handle a single PDGenerationRequest:
|
|
* 1) submit request to AsyncLLM
|
|
* 2) iterate the RequestOutputs
|
|
* 3) convert RequestOutput --> PDResponse
|
|
* 4) serialize and send to PDClient
|
|
"""
|
|
request_id = req.request_id
|
|
|
|
# 1) Submit request to Engine.
|
|
generator = self.engine.generate(
|
|
prompt={"prompt_token_ids": req.prompt_token_ids},
|
|
sampling_params=req.sampling_params,
|
|
request_id=request_id)
|
|
|
|
# 2) Iterate RequestOutputs.
|
|
async for request_output in generator:
|
|
# 3) Convert RequestOutput --> PDResponse.
|
|
response = PDGenerationResponse.from_request_output(request_output)
|
|
|
|
# 4) Serialize and send to PDClient.
|
|
response_bytes = self.encoder.encode(response)
|
|
logger.debug("Sending: %s", request_id)
|
|
await self.to_client.send(response_bytes, copy=False)
|
|
logger.debug("Sent: %s", request_id)
|