gilsleep.ipynb
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Holding the GIL for too long could disrupt the heartbeat due to non-copying sends.
The following cell repeatedly calls a function that holds the GIL for five seconds.
The heartbeat will fail after a few iterations prior to fixing Issue #1260.
In [1]:
import sys
import time
from cython import inline
def gilsleep(t):
"""gil-holding sleep with cython.inline"""
code = '\n'.join([
'from posix cimport unistd',
'unistd.sleep(t)',
])
while True:
inline(code, quiet=True, t=t)
print(time.time())
sys.stdout.flush() # this is important
gilsleep(5)
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