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02035bc68d
to stdout. Repaired by not printing at all except in verbose mode. Made the test about 6x faster -- envelope analysis showed it took time proportional to the square of the # of tasks. Now it's linear.
55 lines
1.4 KiB
Python
55 lines
1.4 KiB
Python
# Very rudimentary test of threading module
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# Create a bunch of threads, let each do some work, wait until all are done
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from test_support import verbose
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import random
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import threading
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import time
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# This takes about n/3 seconds to run (about n/3 clumps of tasks, times
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# about 1 second per clump).
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numtasks = 10
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# no more than 3 of the 10 can run at once
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sema = threading.BoundedSemaphore(value=3)
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mutex = threading.RLock()
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running = 0
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class TestThread(threading.Thread):
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def run(self):
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global running
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delay = random.random() * 2
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if verbose:
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print 'task', self.getName(), 'will run for', delay, 'sec'
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sema.acquire()
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mutex.acquire()
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running = running + 1
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if verbose:
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print running, 'tasks are running'
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mutex.release()
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time.sleep(delay)
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if verbose:
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print 'task', self.getName(), 'done'
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mutex.acquire()
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running = running - 1
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if verbose:
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print self.getName(), 'is finished.', running, 'tasks are running'
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mutex.release()
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sema.release()
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threads = []
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def starttasks():
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for i in range(numtasks):
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t = TestThread(name="<thread %d>"%i)
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threads.append(t)
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t.start()
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starttasks()
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if verbose:
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print 'waiting for all tasks to complete'
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for t in threads:
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t.join()
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if verbose:
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print 'all tasks done'
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