Attachment 196421 Details for Bug 222126 – run a bunch of threads, and detect if sleep fails to wakeup

run a bunch of threads, and detect if sleep fails to wakeup

sleeptest.py (text/plain), 2.44 KB, created by John-Mark Gurney on 2018-08-21 15:01:04 UTC

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Creator: John-Mark Gurney

Created: 2018-08-21 15:01:04 UTC

Size: 2.44 KB

patch

obsolete

># Copyright 2018 John-Mark Gurney.
># All rights reserved.
>#
># Redistribution and use in source and binary forms, with or without
># modification, are permitted provided that the following conditions
># are met:
># 1. Redistributions of source code must retain the above copyright
>#    notice, this list of conditions and the following disclaimer.
># 2. Redistributions in binary form must reproduce the above copyright
>#    notice, this list of conditions and the following disclaimer in the
>#    documentation and/or other materials provided with the distribution.
>#
># THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
># ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
># IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
># ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
># FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
># DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
># OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
># HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
># LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
># OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
># SUCH DAMAGE.
>#
>#	$Id$
>#
>
>import Queue
>import threading
>import time
>import random
>
>def sleepfun(q, lngth, extlst, idobj):
>
>	while not extlst:
>		#factor = (random.random() + 1) * 4
>		factor = 1
>		factor = (random.random() * .5 + 1)
>		time.sleep(lngth * factor)
>		q.put((idobj, time.time()))
>
>def run():
>	sleeplength = .5
>	exitlist = []
>	nthreads = 20
>
>	q = Queue.Queue()
>
>	thds = {}
>	lastcheck = {}
>
>	for i in xrange(nthreads):
>		obj = object()
>		thr = threading.Thread(target=sleepfun, args=(q, sleeplength, exitlist, obj))
>		thds[obj] = thr
>		lastcheck[obj] = time.time()
>		thr.start()
>
>	try:
>		while True:
>			for i in xrange(nthreads*3):
>				obj, tm = q.get()
>				lastcheck[obj] = tm
>
>			cur = time.time()
>			for i in lastcheck.keys():
>				if not thds[i].isAlive():
>					print 'thread died.'
>					del thds[i]
>					del lastcheck[i]
>					continue
>
>				print 'last checkin:', cur - lastcheck[i]
>				if cur - lastcheck[i] > 2 * sleeplength:
>					print 'thread is stuck:', `obj`, 'since:', time.ctime(lastcheck[i])
>	except KeyboardInterrupt:
>		print 'trying to exit...'
>		print time.ctime(time.time())
>		exitlist.append(True)
>		for i in thds:
>			thds[i].join()
>
>if __name__ == '__main__':
>	run()

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Attachments on bug 222126: 196421