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import threading
import pytest
import parsl
from parsl.config import Config
from parsl.executors import HighThroughputExecutor
from parsl.launchers import SimpleLauncher
from parsl.providers import LocalProvider
# Timing notes:
# The configured strategy_period must be much smaller than the delay in
# app() so that multiple iterations of the strategy have had a chance
# to (mis)behave.
# The status polling interval in OneShotLocalProvider must be much bigger
# than the above times, so that the job status cached from the provider
# will not be updated while the single invocation of app() runs.
@parsl.python_app
def app():
import time
time.sleep(1)
class OneShotLocalProvider(LocalProvider):
def __init__(self, *args, **kwargs):
self.recorded_submits = 0
super().__init__(*args, **kwargs)
def submit(self, *args, **kwargs):
self.recorded_submits += 1
return super().submit(*args, **kwargs)
status_polling_interval = 600
@pytest.mark.local
def test_one_block(tmpd_cwd):
"""
this test is intended to ensure that only one block is launched when only
one app is invoked. this is a regression test.
"""
oneshot_provider = OneShotLocalProvider(
init_blocks=0,
min_blocks=0,
max_blocks=10,
launcher=SimpleLauncher(),
)
config = Config(
executors=[
HighThroughputExecutor(
label="htex_local",
address="127.0.0.1",
worker_debug=True,
cores_per_worker=1,
encrypted=True,
provider=oneshot_provider,
worker_logdir_root=str(tmpd_cwd)
)
],
strategy='simple',
strategy_period=0.1
)
with parsl.load(config):
app().result()
assert oneshot_provider.recorded_submits == 1
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