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-#
-# Simple benchmarks for the multiprocessing package
-#
-# Copyright (c) 2006-2008, R Oudkerk
-# All rights reserved.
-#
-
-import time
-import multiprocessing
-import threading
-import queue
-import gc
-
-_timer = time.perf_counter
-
-delta = 1
-
-
-#### TEST_QUEUESPEED
-
-def queuespeed_func(q, c, iterations):
- a = '0' * 256
- c.acquire()
- c.notify()
- c.release()
-
- for i in range(iterations):
- q.put(a)
-
- q.put('STOP')
-
-def test_queuespeed(Process, q, c):
- elapsed = 0
- iterations = 1
-
- while elapsed < delta:
- iterations *= 2
-
- p = Process(target=queuespeed_func, args=(q, c, iterations))
- c.acquire()
- p.start()
- c.wait()
- c.release()
-
- result = None
- t = _timer()
-
- while result != 'STOP':
- result = q.get()
-
- elapsed = _timer() - t
-
- p.join()
-
- print(iterations, 'objects passed through the queue in', elapsed, 'seconds')
- print('average number/sec:', iterations/elapsed)
-
-
-#### TEST_PIPESPEED
-
-def pipe_func(c, cond, iterations):
- a = '0' * 256
- cond.acquire()
- cond.notify()
- cond.release()
-
- for i in range(iterations):
- c.send(a)
-
- c.send('STOP')
-
-def test_pipespeed():
- c, d = multiprocessing.Pipe()
- cond = multiprocessing.Condition()
- elapsed = 0
- iterations = 1
-
- while elapsed < delta:
- iterations *= 2
-
- p = multiprocessing.Process(target=pipe_func,
- args=(d, cond, iterations))
- cond.acquire()
- p.start()
- cond.wait()
- cond.release()
-
- result = None
- t = _timer()
-
- while result != 'STOP':
- result = c.recv()
-
- elapsed = _timer() - t
- p.join()
-
- print(iterations, 'objects passed through connection in',elapsed,'seconds')
- print('average number/sec:', iterations/elapsed)
-
-
-#### TEST_SEQSPEED
-
-def test_seqspeed(seq):
- elapsed = 0
- iterations = 1
-
- while elapsed < delta:
- iterations *= 2
-
- t = _timer()
-
- for i in range(iterations):
- a = seq[5]
-
- elapsed = _timer() - t
-
- print(iterations, 'iterations in', elapsed, 'seconds')
- print('average number/sec:', iterations/elapsed)
-
-
-#### TEST_LOCK
-
-def test_lockspeed(l):
- elapsed = 0
- iterations = 1
-
- while elapsed < delta:
- iterations *= 2
-
- t = _timer()
-
- for i in range(iterations):
- l.acquire()
- l.release()
-
- elapsed = _timer() - t
-
- print(iterations, 'iterations in', elapsed, 'seconds')
- print('average number/sec:', iterations/elapsed)
-
-
-#### TEST_CONDITION
-
-def conditionspeed_func(c, N):
- c.acquire()
- c.notify()
-
- for i in range(N):
- c.wait()
- c.notify()
-
- c.release()
-
-def test_conditionspeed(Process, c):
- elapsed = 0
- iterations = 1
-
- while elapsed < delta:
- iterations *= 2
-
- c.acquire()
- p = Process(target=conditionspeed_func, args=(c, iterations))
- p.start()
-
- c.wait()
-
- t = _timer()
-
- for i in range(iterations):
- c.notify()
- c.wait()
-
- elapsed = _timer() - t
-
- c.release()
- p.join()
-
- print(iterations * 2, 'waits in', elapsed, 'seconds')
- print('average number/sec:', iterations * 2 / elapsed)
-
-####
-
-def test():
- manager = multiprocessing.Manager()
-
- gc.disable()
-
- print('\n\t######## testing Queue.Queue\n')
- test_queuespeed(threading.Thread, queue.Queue(),
- threading.Condition())
- print('\n\t######## testing multiprocessing.Queue\n')
- test_queuespeed(multiprocessing.Process, multiprocessing.Queue(),
- multiprocessing.Condition())
- print('\n\t######## testing Queue managed by server process\n')
- test_queuespeed(multiprocessing.Process, manager.Queue(),
- manager.Condition())
- print('\n\t######## testing multiprocessing.Pipe\n')
- test_pipespeed()
-
- print()
-
- print('\n\t######## testing list\n')
- test_seqspeed(list(range(10)))
- print('\n\t######## testing list managed by server process\n')
- test_seqspeed(manager.list(list(range(10))))
- print('\n\t######## testing Array("i", ..., lock=False)\n')
- test_seqspeed(multiprocessing.Array('i', list(range(10)), lock=False))
- print('\n\t######## testing Array("i", ..., lock=True)\n')
- test_seqspeed(multiprocessing.Array('i', list(range(10)), lock=True))
-
- print()
-
- print('\n\t######## testing threading.Lock\n')
- test_lockspeed(threading.Lock())
- print('\n\t######## testing threading.RLock\n')
- test_lockspeed(threading.RLock())
- print('\n\t######## testing multiprocessing.Lock\n')
- test_lockspeed(multiprocessing.Lock())
- print('\n\t######## testing multiprocessing.RLock\n')
- test_lockspeed(multiprocessing.RLock())
- print('\n\t######## testing lock managed by server process\n')
- test_lockspeed(manager.Lock())
- print('\n\t######## testing rlock managed by server process\n')
- test_lockspeed(manager.RLock())
-
- print()
-
- print('\n\t######## testing threading.Condition\n')
- test_conditionspeed(threading.Thread, threading.Condition())
- print('\n\t######## testing multiprocessing.Condition\n')
- test_conditionspeed(multiprocessing.Process, multiprocessing.Condition())
- print('\n\t######## testing condition managed by a server process\n')
- test_conditionspeed(multiprocessing.Process, manager.Condition())
-
- gc.enable()
-
-if __name__ == '__main__':
- multiprocessing.freeze_support()
- test()