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### Kill the thread in a long computation

Hello

I'm trying to run a long factor() computation and kill it if it took more than 10 seconds. As a simple example to kill a thread in python using signals consider the following code:

def loop_forever():
import time
while True:
time.sleep(1)
return 1;

def handler(signum, frame):
raise Exception("end of time")

def timeout(func, args=(), kwargs={}, timeout_duration=10):
signal.signal(signal.SIGALRM, handler)
signal.alarm(timeout_duration)
try:
func(*args, **kwargs)
except Exception:
pass
signal.alarm(0)

timeout(loop_forever)


This would run fine and the thread would be killed after 10 seconds

If on the other hand instead of calling loop_forever() I call

factor(Primes().next(2^400) * Primes().next(2^500))


The thread is not killed after 10 seconds and it continues the computation Any idea why this is happening?

cheers

### Kill the thread in a long computation

Hello

I'm trying to run a long factor() computation and kill it if it took more than 10 seconds. As a simple example to kill a thread in python using signals consider the following code:

def loop_forever():
import time
while True:
time.sleep(1)
return 1;

def handler(signum, frame):
raise Exception("end of time")

def timeout(func, args=(), kwargs={}, timeout_duration=10):
signal.signal(signal.SIGALRM, handler)
signal.alarm(timeout_duration)
try:
func(*args, **kwargs)
except Exception:
pass
signal.alarm(0)

timeout(loop_forever)


This would run fine and the thread would be killed after 10 seconds

If on the other hand instead of calling loop_forever() I call

def: crackKey():
return factor(Primes().next(2^400) * Primes().next(2^500))

timeout(crackKey)


The thread is not killed after 10 seconds and it continues the computation Any idea why this is happening?

cheers

 3 typo tmonteil 18873 ●22 ●132 ●350 http://wiki.sagemath.o...

### Kill the thread in a long computation

Hello

I'm trying to run a long factor() computation and kill it if it took more than 10 seconds. As a simple example to kill a thread in python using signals consider the following code:

def loop_forever():
import time
while True:
time.sleep(1)
return 1;

def handler(signum, frame):
raise Exception("end of time")

def timeout(func, args=(), kwargs={}, timeout_duration=10):
signal.signal(signal.SIGALRM, handler)
signal.alarm(timeout_duration)
try:
func(*args, **kwargs)
except Exception:
pass
signal.alarm(0)

timeout(loop_forever)


This would run fine and the thread would be killed after 10 seconds

If on the other hand instead of calling loop_forever() I call

def: def crackKey():
return factor(Primes().next(2^400) * Primes().next(2^500))

timeout(crackKey)


The thread is not killed after 10 seconds and it continues the computation Any idea why this is happening?

cheers