-# Copyright (c) 2019 Cisco and/or its affiliates.
+# Copyright (c) 2020 Cisco and/or its affiliates.
# Licensed 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:
trial_number_offset=0, timeout=1800.0, trace_enabled=False):
"""Store rate measurer and additional parameters.
+ The measurer must never report negative loss count.
+
TODO: Copy AbstractMeasurer from MLRsearch.
:param measurer: The measurer to call when searching.
dilled_function = dill.dumps(value_logweight_func)
boss_pipe_end, worker_pipe_end = multiprocessing.Pipe()
- boss_pipe_end.send(
- (dimension, dilled_function, focus_tracker, max_samples)
- )
+ # Do not send yet, run the worker first to avoid a deadlock.
+ # See https://stackoverflow.com/a/15716500
worker = multiprocessing.Process(
target=Integrator.try_estimate_nd,
args=(worker_pipe_end, 10.0, self.trace_enabled)
)
worker.daemon = True
worker.start()
+ boss_pipe_end.send(
+ (dimension, dilled_function, focus_tracker, max_samples)
+ )
return boss_pipe_end
erf_pipe = start_computing(self.lfit_erf, erf_focus_tracker)
and number of samples used for this iteration.
:rtype: _PartialResult
"""
- pipe.send(None)
+ # If worker encountered an exception, we get it in the recv below,
+ # but send will report a broken pipe.
+ # EAFP says we should ignore the error (instead of polling first).
+ # https://devblogs.microsoft.com/python
+ # /idiomatic-python-eafp-versus-lbyl/
+ try:
+ pipe.send(None)
+ except BrokenPipeError:
+ pass
if not pipe.poll(10.0):
raise RuntimeError(f"Worker {name} did not finish!")
result_or_traceback = pipe.recv()