mirror of
https://github.com/firestar5683/StarPilot.git
synced 2026-11-08 13:33:42 +08:00
YassineYousfi
52 lines
2.1 KiB
Python
52 lines
2.1 KiB
Python
import multiprocessing, multiprocessing.util, atexit, signal, sys, os, threading, contextlib, subprocess, importlib
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from multiprocessing.context import SpawnContext, SpawnProcess
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from tinygrad.helpers import Context, getenv, PARALLEL
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# generic pool of worker processes for parallel compilation, shared by kernel lowering and BEAM search
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# workers should not open devices and should ignore ctrl c and should not launch VIZ
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def _init_worker():
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Context(ALLOW_DEVICE_USAGE=0, VIZ=0, TRACK_MATCH_STATS=0).__enter__()
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signal.signal(signal.SIGINT, signal.SIG_IGN)
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# spawn reimports the user's __main__ before _init_worker, replaying top-level code and potentially creating pools recursively.
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# A spec named "__main__" makes multiprocessing.spawn skip that import.
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_spawn_lock = threading.Lock()
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@contextlib.contextmanager
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def _without_main():
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main = sys.modules["__main__"]
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with _spawn_lock:
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saved = main.__spec__
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try:
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main.__spec__ = importlib.machinery.ModuleSpec("__main__", None)
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yield
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finally: main.__spec__ = saved
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# spawn execs with the live environ, other threads changing os.environ (pytest) can break it: https://github.com/python/cpython/issues/157613
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def _spawnv_passfds(path, args, passfds):
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(p:=subprocess.Popen(args, executable=path, pass_fds=passfds, env=getattr(os.environ, "_data").copy())).returncode = 0 # multiprocessing reaps it
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return p.pid
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multiprocessing.util.spawnv_passfds = _spawnv_passfds
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class _WorkerProcess(SpawnProcess):
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@staticmethod
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def _Popen(process_obj):
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with _without_main(): return SpawnProcess._Popen(process_obj)
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class _WorkerContext(SpawnContext): Process = _WorkerProcess
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worker_pool = None
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def get_worker_pool():
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global worker_pool
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if multiprocessing.current_process().daemon or PARALLEL == 0: return None
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if worker_pool is None:
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worker_pool = _WorkerContext().Pool(PARALLEL.value, _init_worker, (), getenv("BEAM_MAX_TASKS_PER_CHILD", 16))
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@atexit.register
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def close_pool(pool=worker_pool): pool.close()
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return worker_pool
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def terminate_worker_pool():
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global worker_pool
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if worker_pool is not None: worker_pool.terminate()
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worker_pool = None
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