tqchen commented on a change in pull request #6959: URL: https://github.com/apache/tvm/pull/6959#discussion_r545401076
########## File path: python/tvm/exec/popen_worker.py ########## @@ -0,0 +1,104 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +# pylint: disable=invalid-name +"""Internal PopenWorker for PopenPool.""" +import sys +import os +import struct +import threading +import traceback +import pickle +import cloudpickle + +from tvm.contrib.popen_pool import StatusKind + + +class TimeoutStatus: + __slot__ = ["status"] + + def __init__(self): + self.status = StatusKind.RUNNING + + +def main(): + """Main worker function""" + if len(sys.argv) != 3: + print("Usage: <read_fd> <write_fd>") + return + if sys.platform == "win32": + # pylint: disable=import-outside-toplevel + import msvcrt + + reader = os.fdopen(msvcrt.open_osfhandle(int(sys.argv[1]), os.O_BINARY), "rb") + writer = os.fdopen(msvcrt.open_osfhandle(int(sys.argv[2]), os.O_BINARY), "wb") + else: + reader = os.fdopen(int(sys.argv[1]), "rb") + writer = os.fdopen(int(sys.argv[2]), "wb") + + lock = threading.Lock() + + def _respond(ret_value): + """Send data back to the client.""" + data = cloudpickle.dumps(ret_value, protocol=pickle.HIGHEST_PROTOCOL) + writer.write(struct.pack("<i", len(data))) + writer.write(data) + writer.flush() + + def _cancel_run(status): + lock.acquire() + if status.status == StatusKind.RUNNING: + _respond((StatusKind.TIMEOUT, TimeoutError())) + status.status = StatusKind.TIMEOUT + lock.release() + + while True: + raw_bytes_size = reader.read(4) + if len(raw_bytes_size) != 4: + # the parent exited + return + bytes_size = struct.unpack("<i", raw_bytes_size)[0] + fn, args, kwargs, timeout = cloudpickle.loads(reader.read(bytes_size)) + status = TimeoutStatus() + + if timeout is not None: + watcher = threading.Timer(timeout, _cancel_run, [status]) + watcher.daemon = True + watcher.start() + + # pylint: disable=broad-except + try: + result = fn(*args, **kwargs) + ret_value = (StatusKind.COMPLETE, result) + except Exception as exception: + msg = traceback.format_exc() + ret_value = (StatusKind.EXCEPTION, type(exception)(msg)) + + if timeout is not None: + watcher.cancel() Review comment: I don't think so, given the API is provided by python itself and meant to be used in this way ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
