Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_thread.py @ 58925:eecf1bef052d 2.6

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Merged revisions 78207 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r78207 | ezio.melotti | 2010-02-17 01:26:09 +0200 (Wed, 17 Feb 2010) | 1 line #7930: fix stripid ........
author Ezio Melotti <ezio.melotti@gmail.com>
date Tue, 16 Feb 2010 23:29:44 +0000
parents 0eb56a8e6262
children d5f50ae4f1f7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import os
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2 import unittest
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3 import random
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4 from test import test_support
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5 import thread
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6 import time
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7
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8 from test import lock_tests
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9
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10 NUMTASKS = 10
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11 NUMTRIPS = 3
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12
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13
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14 _print_mutex = thread.allocate_lock()
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15
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16 def verbose_print(arg):
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17 """Helper function for printing out debugging output."""
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18 if test_support.verbose:
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19 with _print_mutex:
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20 print arg
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21
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22
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23 class BasicThreadTest(unittest.TestCase):
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24
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25 def setUp(self):
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26 self.done_mutex = thread.allocate_lock()
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27 self.done_mutex.acquire()
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28 self.running_mutex = thread.allocate_lock()
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29 self.random_mutex = thread.allocate_lock()
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30 self.created = 0
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31 self.running = 0
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32 self.next_ident = 0
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34
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35 class ThreadRunningTests(BasicThreadTest):
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36
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37 def newtask(self):
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38 with self.running_mutex:
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39 self.next_ident += 1
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40 verbose_print("creating task %s" % self.next_ident)
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41 thread.start_new_thread(self.task, (self.next_ident,))
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42 self.created += 1
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43 self.running += 1
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44
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45 def task(self, ident):
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46 with self.random_mutex:
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47 delay = random.random() / 10000.0
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48 verbose_print("task %s will run for %sus" % (ident, round(delay*1e6)))
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49 time.sleep(delay)
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50 verbose_print("task %s done" % ident)
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51 with self.running_mutex:
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52 self.running -= 1
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53 if self.created == NUMTASKS and self.running == 0:
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54 self.done_mutex.release()
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55
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56 def test_starting_threads(self):
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57 # Basic test for thread creation.
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58 for i in range(NUMTASKS):
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59 self.newtask()
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60 verbose_print("waiting for tasks to complete...")
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61 self.done_mutex.acquire()
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62 verbose_print("all tasks done")
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63
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64 def test_stack_size(self):
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65 # Various stack size tests.
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66 self.assertEquals(thread.stack_size(), 0, "intial stack size is not 0")
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67
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68 thread.stack_size(0)
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69 self.assertEquals(thread.stack_size(), 0, "stack_size not reset to default")
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70
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71 if os.name not in ("nt", "os2", "posix"):
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72 return
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73
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74 tss_supported = True
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75 try:
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76 thread.stack_size(4096)
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77 except ValueError:
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78 verbose_print("caught expected ValueError setting "
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79 "stack_size(4096)")
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80 except thread.error:
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81 tss_supported = False
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82 verbose_print("platform does not support changing thread stack "
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83 "size")
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84
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85 if tss_supported:
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86 fail_msg = "stack_size(%d) failed - should succeed"
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87 for tss in (262144, 0x100000, 0):
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88 thread.stack_size(tss)
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89 self.assertEquals(thread.stack_size(), tss, fail_msg % tss)
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90 verbose_print("successfully set stack_size(%d)" % tss)
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91
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92 for tss in (262144, 0x100000):
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93 verbose_print("trying stack_size = (%d)" % tss)
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94 self.next_ident = 0
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95 self.created = 0
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96 for i in range(NUMTASKS):
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97 self.newtask()
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98
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99 verbose_print("waiting for all tasks to complete")
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100 self.done_mutex.acquire()
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101 verbose_print("all tasks done")
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102
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103 thread.stack_size(0)
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104
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105
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106 class Barrier:
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107 def __init__(self, num_threads):
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108 self.num_threads = num_threads
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109 self.waiting = 0
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110 self.checkin_mutex = thread.allocate_lock()
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111 self.checkout_mutex = thread.allocate_lock()
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112 self.checkout_mutex.acquire()
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113
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114 def enter(self):
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115 self.checkin_mutex.acquire()
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116 self.waiting = self.waiting + 1
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117 if self.waiting == self.num_threads:
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118 self.waiting = self.num_threads - 1
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119 self.checkout_mutex.release()
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120 return
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121 self.checkin_mutex.release()
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122
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123 self.checkout_mutex.acquire()
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124 self.waiting = self.waiting - 1
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125 if self.waiting == 0:
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126 self.checkin_mutex.release()
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127 return
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128 self.checkout_mutex.release()
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129
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130
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131 class BarrierTest(BasicThreadTest):
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132
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133 def test_barrier(self):
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134 self.bar = Barrier(NUMTASKS)
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135 self.running = NUMTASKS
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136 for i in range(NUMTASKS):
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137 thread.start_new_thread(self.task2, (i,))
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138 verbose_print("waiting for tasks to end")
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139 self.done_mutex.acquire()
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140 verbose_print("tasks done")
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141
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142 def task2(self, ident):
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143 for i in range(NUMTRIPS):
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144 if ident == 0:
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145 # give it a good chance to enter the next
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146 # barrier before the others are all out
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147 # of the current one
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148 delay = 0
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149 else:
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150 with self.random_mutex:
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151 delay = random.random() / 10000.0
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152 verbose_print("task %s will run for %sus" %
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153 (ident, round(delay * 1e6)))
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154 time.sleep(delay)
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155 verbose_print("task %s entering %s" % (ident, i))
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156 self.bar.enter()
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157 verbose_print("task %s leaving barrier" % ident)
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158 with self.running_mutex:
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159 self.running -= 1
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160 # Must release mutex before releasing done, else the main thread can
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161 # exit and set mutex to None as part of global teardown; then
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162 # mutex.release() raises AttributeError.
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163 finished = self.running == 0
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164 if finished:
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165 self.done_mutex.release()
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166
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167
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168 class LockTests(lock_tests.LockTests):
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169 locktype = thread.allocate_lock
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170
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171
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172 def test_main():
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173 test_support.run_unittest(ThreadRunningTests, BarrierTest, LockTests)
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174
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175 if __name__ == "__main__":
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176 test_main()