364 lines
12 KiB
Python
364 lines
12 KiB
Python
from collections import Counter
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from logging import getLogger
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from queue import Empty
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from threading import Thread
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from typing import Any, Callable, Dict, List, Optional, Tuple
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from torch.multiprocessing import Process, Queue, Value
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from ..params import DeviceParams
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from ..server import ServerContext
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from .context import WorkerContext
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from .worker import worker_main
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logger = getLogger(__name__)
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class DevicePoolExecutor:
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server: ServerContext
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devices: List[DeviceParams]
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max_jobs_per_worker: int
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max_pending_per_worker: int
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join_timeout: float
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context: Dict[str, WorkerContext] # Device -> Context
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pending: Dict[str, "Queue[Tuple[str, Callable[..., None], Any, Any]]"]
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threads: Dict[str, Thread]
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workers: Dict[str, Process]
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active_jobs: Dict[str, Tuple[str, int]] # should be Dict[Device, JobStatus]
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cancelled_jobs: List[str]
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finished_jobs: List[Tuple[str, int, bool]] # should be List[JobStatus]
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total_jobs: Dict[str, int] # Device -> job count
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logs: "Queue"
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progress: "Queue[Tuple[str, str, int]]"
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finished: "Queue[Tuple[str, str]]"
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def __init__(
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self,
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server: ServerContext,
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devices: List[DeviceParams],
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max_jobs_per_worker: int = 10,
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max_pending_per_worker: int = 100,
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join_timeout: float = 1.0,
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):
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self.server = server
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self.devices = devices
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self.max_jobs_per_worker = max_jobs_per_worker
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self.max_pending_per_worker = max_pending_per_worker
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self.join_timeout = join_timeout
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self.context = {}
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self.pending = {}
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self.threads = {}
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self.workers = {}
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self.active_jobs = {}
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self.cancelled_jobs = []
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self.finished_jobs = []
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self.total_jobs = {}
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self.logs = Queue(self.max_pending_per_worker)
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self.progress = Queue(self.max_pending_per_worker)
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self.finished = Queue(self.max_pending_per_worker)
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# TODO: these should be part of a start method
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self.create_logger_worker()
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self.create_progress_worker()
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self.create_finished_worker()
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for device in devices:
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self.create_device_worker(device)
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def create_device_worker(self, device: DeviceParams) -> None:
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name = device.device
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# reuse the queue if possible, to keep queued jobs
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if name in self.pending:
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logger.debug("using existing pending job queue")
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pending = self.pending[name]
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else:
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logger.debug("creating new pending job queue")
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pending = Queue(self.max_pending_per_worker)
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self.pending[name] = pending
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context = WorkerContext(
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name,
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device,
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cancel=Value("B", False),
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progress=self.progress,
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finished=self.finished,
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logs=self.logs,
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pending=pending,
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)
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self.context[name] = context
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self.workers[name] = Process(
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name=f"onnx-web worker: {name}",
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target=worker_main,
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args=(context, self.server),
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)
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logger.debug("starting worker for device %s", device)
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self.workers[name].start()
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def create_logger_worker(self) -> None:
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def logger_worker(logs: Queue):
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logger.info("checking in from logger worker thread")
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while True:
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try:
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job = logs.get(timeout=(self.join_timeout / 2))
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with open("worker.log", "w") as f:
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logger.info("got log: %s", job)
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f.write(str(job) + "\n\n")
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except Empty:
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pass
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except ValueError:
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break
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except Exception as err:
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logger.error("error in log worker: %s", err)
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logger_thread = Thread(
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name="onnx-web logger", target=logger_worker, args=(self.logs,), daemon=True
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)
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self.threads["logger"] = logger_thread
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logger.debug("starting logger worker")
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logger_thread.start()
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def create_progress_worker(self) -> None:
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def progress_worker(progress: Queue):
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logger.info("checking in from progress worker thread")
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while True:
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try:
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job, device, value = progress.get(timeout=(self.join_timeout / 2))
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logger.info("progress update for job: %s to %s", job, value)
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self.active_jobs[job] = (device, value)
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if job in self.cancelled_jobs:
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logger.debug(
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"setting flag for cancelled job: %s on %s", job, device
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)
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self.context[device].set_cancel()
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except Empty:
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pass
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except ValueError:
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break
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except Exception as err:
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logger.error("error in progress worker: %s", err)
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progress_thread = Thread(
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name="onnx-web progress",
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target=progress_worker,
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args=(self.progress,),
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daemon=True,
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)
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self.threads["progress"] = progress_thread
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logger.debug("starting progress worker")
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progress_thread.start()
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def create_finished_worker(self) -> None:
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def finished_worker(finished: Queue):
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logger.info("checking in from finished worker thread")
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while True:
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try:
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job, device = finished.get(timeout=(self.join_timeout / 2))
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logger.info("job has been finished: %s", job)
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context = self.context[device]
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_device, progress = self.active_jobs[job]
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self.finished_jobs.append((job, progress, context.cancel.value))
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del self.active_jobs[job]
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except Empty:
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pass
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except ValueError:
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break
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except Exception as err:
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logger.error("error in finished worker: %s", err)
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finished_thread = Thread(
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name="onnx-web finished",
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target=finished_worker,
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args=(self.finished,),
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daemon=True,
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)
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self.threads["finished"] = finished_thread
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logger.debug("started finished worker")
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finished_thread.start()
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def get_job_context(self, key: str) -> WorkerContext:
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device, _progress = self.active_jobs[key]
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return self.context[device]
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def get_next_device(self, needs_device: Optional[DeviceParams] = None) -> int:
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# respect overrides if possible
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if needs_device is not None:
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for i in range(len(self.devices)):
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if self.devices[i].device == needs_device.device:
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return i
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jobs = Counter(range(len(self.devices)))
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jobs.update([self.pending[d.device].qsize() for d in self.devices])
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queued = jobs.most_common()
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logger.debug("jobs queued by device: %s", queued)
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lowest_count = queued[-1][1]
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lowest_devices = [d[0] for d in queued if d[1] == lowest_count]
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lowest_devices.sort()
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return lowest_devices[0]
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def cancel(self, key: str) -> bool:
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"""
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Cancel a job. If the job has not been started, this will cancel
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the future and never execute it. If the job has been started, it
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should be cancelled on the next progress callback.
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"""
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self.cancelled_jobs.append(key)
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if key not in self.active_jobs:
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logger.debug("cancelled job has not been started yet: %s", key)
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return True
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device, _progress = self.active_jobs[key]
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logger.info("cancelling job %s, active on device %s", key, device)
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context = self.context[device]
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context.set_cancel()
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return True
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def done(self, key: str) -> Tuple[Optional[bool], int]:
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"""
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Check if a job has been finished and report the last progress update.
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If the job is still active or pending, the first item will be False.
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If the job is not finished or active, the first item will be None.
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"""
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for k, p, c in self.finished_jobs:
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if k == key:
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return (True, p)
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if key not in self.active_jobs:
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logger.warn("checking status for unknown job: %s", key)
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return (None, 0)
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_device, progress = self.active_jobs[key]
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return (False, progress)
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def join(self):
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logger.info("stopping worker pool")
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logger.debug("closing queues")
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self.logs.close()
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self.finished.close()
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self.progress.close()
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for queue in self.pending.values():
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queue.close()
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self.pending.clear()
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logger.debug("stopping device workers")
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for device, worker in self.workers.items():
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if worker.is_alive():
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logger.debug("stopping worker for device %s", device)
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worker.join(self.join_timeout)
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if worker.is_alive():
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logger.warning(
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"worker for device %s could not be stopped in time", device
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)
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else:
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logger.debug("worker for device %s has died", device)
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for name, thread in self.threads.items():
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logger.debug("stopping worker thread: %s", name)
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thread.join(self.join_timeout)
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logger.debug("worker pool stopped")
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def recycle(self):
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logger.debug("recycling worker pool")
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needs_restart = []
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for device, proc in self.workers.items():
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jobs = self.total_jobs.get(device, 0)
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if not proc.is_alive():
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logger.warning("worker for device %s has died", device)
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needs_restart.append(device)
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elif jobs > self.max_jobs_per_worker:
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logger.info(
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"shutting down worker for device %s after %s jobs", device, jobs
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)
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proc.join(self.join_timeout)
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if proc.is_alive():
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logger.warning(
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"worker for device %s could not be recycled in time", device
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)
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self.workers[device] = None
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del proc
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needs_restart.append(device)
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else:
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logger.debug(
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"worker for device %s does not need to be recycled", device
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)
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logger.debug("starting new workers")
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for device in self.devices:
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if device.device in needs_restart:
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self.create_device_worker(device)
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self.total_jobs[device.device] = 0
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logger.debug("worker pool recycled")
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def submit(
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self,
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key: str,
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fn: Callable[..., None],
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/,
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*args,
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needs_device: Optional[DeviceParams] = None,
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**kwargs,
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) -> None:
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device_idx = self.get_next_device(needs_device=needs_device)
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logger.info(
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"assigning job %s to device %s: %s",
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key,
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device_idx,
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self.devices[device_idx],
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)
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device = self.devices[device_idx].device
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if device in self.total_jobs:
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self.total_jobs[device] += 1
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else:
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self.total_jobs[device] = 1
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logger.debug("device job count: %s", self.total_jobs[device])
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self.recycle()
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self.pending[device].put((key, fn, args, kwargs), block=False)
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def status(self) -> List[Tuple[str, int, bool, bool]]:
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history = [
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(name, progress, False, name in self.cancelled_jobs)
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for name, (_device, progress) in self.active_jobs.items()
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]
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history.extend(
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[
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(
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name,
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progress,
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True,
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cancel,
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)
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for name, progress, cancel in self.finished_jobs
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]
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)
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return history
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