source file: /home/buildslave/tahoe/edgy/build/src/allmydata/control.py
file stats: 170 lines, 151 executed: 88.8% covered
1.
2. import os, time
3. from zope.interface import implements
4. from twisted.application import service
5. from twisted.internet import defer
6. from foolscap import Referenceable
7. from allmydata.interfaces import RIControlClient
8. from allmydata.util import testutil, fileutil, mathutil
9. from allmydata.immutable import upload, download
10. from twisted.python import log
11.
12. def get_memory_usage():
13. # this is obviously linux-specific
14. stat_names = ("VmPeak",
15. "VmSize",
16. #"VmHWM",
17. "VmData")
18. stats = {}
19. try:
20. for line in open("/proc/self/status", "r").readlines():
21. name, right = line.split(":",2)
22. if name in stat_names:
23. assert right.endswith(" kB\n")
24. right = right[:-4]
25. stats[name] = int(right) * 1024
26. except:
27. # Probably not on (a compatible version of) Linux
28. stats['VmSize'] = 0
29. stats['VmPeak'] = 0
30. return stats
31.
32. def log_memory_usage(where=""):
33. stats = get_memory_usage()
34. log.msg("VmSize: %9d VmPeak: %9d %s" % (stats["VmSize"],
35. stats["VmPeak"],
36. where))
37.
38.
39. class ControlServer(Referenceable, service.Service, testutil.PollMixin):
40. implements(RIControlClient)
41.
42. def remote_wait_for_client_connections(self, num_clients):
43. return self.parent.debug_wait_for_client_connections(num_clients)
44.
45. def remote_upload_from_file_to_uri(self, filename, convergence):
46. uploader = self.parent.getServiceNamed("uploader")
47. u = upload.FileName(filename, convergence=convergence)
48. d = uploader.upload(u)
49. d.addCallback(lambda results: results.uri)
50. return d
51.
52. def remote_download_from_uri_to_file(self, uri, filename):
53. downloader = self.parent.getServiceNamed("downloader")
54. d = downloader.download_to_filename(uri, filename)
55. d.addCallback(lambda res: filename)
56. return d
57.
58. def remote_speed_test(self, count, size, mutable):
59. assert size > 8
60. log.msg("speed_test: count=%d, size=%d, mutable=%s" % (count, size,
61. mutable))
62. st = SpeedTest(self.parent, count, size, mutable)
63. return st.run()
64.
65. def remote_get_memory_usage(self):
66. return get_memory_usage()
67.
68. def remote_measure_peer_response_time(self):
69. # I'd like to average together several pings, but I don't want this
70. # phase to take more than 10 seconds. Expect worst-case latency to be
71. # 300ms.
72. results = {}
73. conns = self.parent.introducer_client.get_all_connections_for("storage")
74. everyone = [(peerid,rref) for (peerid, service_name, rref) in conns]
75. num_pings = int(mathutil.div_ceil(10, (len(everyone) * 0.3)))
76. everyone = everyone * num_pings
77. d = self._do_one_ping(None, everyone, results)
78. return d
79. def _do_one_ping(self, res, everyone_left, results):
80. if not everyone_left:
81. return results
82. peerid, connection = everyone_left.pop(0)
83. start = time.time()
84. d = connection.callRemote("get_versions")
85. def _done(ignored):
86. stop = time.time()
87. elapsed = stop - start
88. if peerid in results:
89. results[peerid].append(elapsed)
90. else:
91. results[peerid] = [elapsed]
92. d.addCallback(_done)
93. d.addCallback(self._do_one_ping, everyone_left, results)
94. def _average(res):
95. averaged = {}
96. for peerid,times in results.iteritems():
97. averaged[peerid] = sum(times) / len(times)
98. return averaged
99. d.addCallback(_average)
100. return d
101.
102. class SpeedTest:
103. def __init__(self, parent, count, size, mutable):
104. self.parent = parent
105. self.count = count
106. self.size = size
107. self.mutable_mode = mutable
108. self.uris = {}
109. self.basedir = os.path.join(self.parent.basedir, "_speed_test_data")
110.
111. def run(self):
112. self.create_data()
113. d = self.do_upload()
114. d.addCallback(lambda res: self.do_download())
115. d.addBoth(self.do_cleanup)
116. d.addCallback(lambda res: (self.upload_time, self.download_time))
117. return d
118.
119. def create_data(self):
120. fileutil.make_dirs(self.basedir)
121. for i in range(self.count):
122. s = self.size
123. fn = os.path.join(self.basedir, str(i))
124. if os.path.exists(fn):
125. os.unlink(fn)
126. f = open(fn, "w")
127. f.write(os.urandom(8))
128. s -= 8
129. while s > 0:
130. chunk = min(s, 4096)
131. f.write("\x00" * chunk)
132. s -= chunk
133. f.close()
134.
135. def do_upload(self):
136. d = defer.succeed(None)
137. def _create_slot(res):
138. d1 = self.parent.create_mutable_file("")
139. def _created(n):
140. self._n = n
141. d1.addCallback(_created)
142. return d1
143. if self.mutable_mode == "upload":
144. d.addCallback(_create_slot)
145. def _start(res):
146. self._start = time.time()
147. d.addCallback(_start)
148.
149. def _record_uri(uri, i):
150. self.uris[i] = uri
151. def _upload_one_file(ignored, i):
152. if i >= self.count:
153. return
154. fn = os.path.join(self.basedir, str(i))
155. if self.mutable_mode == "create":
156. data = open(fn,"rb").read()
157. d1 = self.parent.create_mutable_file(data)
158. d1.addCallback(lambda n: n.get_uri())
159. elif self.mutable_mode == "upload":
160. data = open(fn,"rb").read()
161. d1 = self._n.overwrite(data)
162. d1.addCallback(lambda res: self._n.get_uri())
163. else:
164. up = upload.FileName(fn, convergence=None)
165. d1 = self.parent.upload(up)
166. d1.addCallback(lambda results: results.uri)
167. d1.addCallback(_record_uri, i)
168. d1.addCallback(_upload_one_file, i+1)
169. return d1
170. d.addCallback(_upload_one_file, 0)
171. def _upload_done(ignored):
172. stop = time.time()
173. self.upload_time = stop - self._start
174. d.addCallback(_upload_done)
175. return d
176.
177. def do_download(self):
178. start = time.time()
179. d = defer.succeed(None)
180. def _download_one_file(ignored, i):
181. if i >= self.count:
182. return
183. n = self.parent.create_node_from_uri(self.uris[i])
184. d1 = n.download(download.FileHandle(Discard()))
185. d1.addCallback(_download_one_file, i+1)
186. return d1
187. d.addCallback(_download_one_file, 0)
188. def _download_done(ignored):
189. stop = time.time()
190. self.download_time = stop - start
191. d.addCallback(_download_done)
192. return d
193.
194. def do_cleanup(self, res):
195. for i in range(self.count):
196. fn = os.path.join(self.basedir, str(i))
197. os.unlink(fn)
198. return res
199.
200. class Discard:
201. def write(self, data):
202. pass
203. # download_to_filehandle explicitly does not close the filehandle it was
204. # given: that is reserved for the provider of the filehandle. Therefore
205. # the lack of a close() method on this otherwise filehandle-like object
206. # is a part of the test.