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66 lines
1.8 KiB
Python
66 lines
1.8 KiB
Python
import itertools
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import threading
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import time
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import numpy as np
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from numpy.testing import assert_equal
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import pytest
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import scipy.interpolate
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class TestGIL(object):
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"""Check if the GIL is properly released by scipy.interpolate functions."""
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def setup_method(self):
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self.messages = []
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def log(self, message):
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self.messages.append(message)
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def make_worker_thread(self, target, args):
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log = self.log
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class WorkerThread(threading.Thread):
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def run(self):
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log('interpolation started')
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target(*args)
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log('interpolation complete')
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return WorkerThread()
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@pytest.mark.slow
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@pytest.mark.xfail(reason='race conditions, may depend on system load')
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def test_rectbivariatespline(self):
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def generate_params(n_points):
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x = y = np.linspace(0, 1000, n_points)
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x_grid, y_grid = np.meshgrid(x, y)
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z = x_grid * y_grid
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return x, y, z
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def calibrate_delay(requested_time):
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for n_points in itertools.count(5000, 1000):
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args = generate_params(n_points)
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time_started = time.time()
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interpolate(*args)
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if time.time() - time_started > requested_time:
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return args
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def interpolate(x, y, z):
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scipy.interpolate.RectBivariateSpline(x, y, z)
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args = calibrate_delay(requested_time=3)
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worker_thread = self.make_worker_thread(interpolate, args)
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worker_thread.start()
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for i in range(3):
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time.sleep(0.5)
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self.log('working')
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worker_thread.join()
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assert_equal(self.messages, [
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'interpolation started',
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'working',
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'working',
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'working',
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'interpolation complete',
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])
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