1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
#
# Simple benchmarks for the multiprocessing package
#
# Copyright (c) 2006-2008, R Oudkerk
# All rights reserved.
#
import time
import sys
import multiprocessing
import threading
import queue
import gc
if sys.platform == 'win32':
_timer = time.clock
else:
_timer = time.time
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()
|
