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| 1 # Copyright 2012 the V8 project authors. All rights reserved. | |
| 2 # Redistribution and use in source and binary forms, with or without | |
| 3 # modification, are permitted provided that the following conditions are | |
| 4 # met: | |
| 5 # | |
| 6 # * Redistributions of source code must retain the above copyright | |
| 7 # notice, this list of conditions and the following disclaimer. | |
| 8 # * Redistributions in binary form must reproduce the above | |
| 9 # copyright notice, this list of conditions and the following | |
| 10 # disclaimer in the documentation and/or other materials provided | |
| 11 # with the distribution. | |
| 12 # * Neither the name of Google Inc. nor the names of its | |
| 13 # contributors may be used to endorse or promote products derived | |
| 14 # from this software without specific prior written permission. | |
| 15 # | |
| 16 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 17 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 18 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 19 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 20 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 21 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 22 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 26 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 | |
| 28 | |
| 29 import os | |
| 30 import shelve | |
| 31 import threading | |
| 32 | |
| 33 | |
| 34 class PerfDataEntry(object): | |
| 35 def __init__(self): | |
| 36 self.avg = 0.0 | |
| 37 self.count = 0 | |
| 38 | |
| 39 def AddResult(self, result): | |
| 40 kLearnRateLimiter = 99 # Greater value means slower learning. | |
| 41 # We use an approximation of the average of the last 100 results here: | |
| 42 # The existing average is weighted with kLearnRateLimiter (or less | |
| 43 # if there are fewer data points). | |
| 44 effective_count = min(self.count, kLearnRateLimiter) | |
| 45 self.avg = self.avg * effective_count + result | |
| 46 self.count = effective_count + 1 | |
| 47 self.avg /= self.count | |
| 48 | |
| 49 | |
| 50 class PerfDataStore(object): | |
| 51 def __init__(self, datadir, arch, mode): | |
| 52 filename = os.path.join(datadir, "%s.%s.perfdata" % (arch, mode)) | |
| 53 self.database = shelve.open(filename, protocol=2) | |
| 54 self.closed = False | |
| 55 self.lock = threading.Lock() | |
| 56 | |
| 57 def __del__(self): | |
| 58 self.close() | |
| 59 | |
| 60 def close(self): | |
| 61 if self.closed: return | |
| 62 self.database.close() | |
| 63 self.closed = True | |
| 64 | |
| 65 def GetKey(self, test): | |
| 66 """Computes the key used to access data for the given testcase.""" | |
| 67 flags = "".join(test.flags) | |
| 68 return str("%s.%s.%s" % (test.suitename(), test.path, flags)) | |
| 69 | |
| 70 def FetchPerfData(self, test): | |
| 71 """Returns the observed duration for |test| as read from the store.""" | |
| 72 key = self.GetKey(test) | |
| 73 if key in self.database: | |
| 74 return self.database[key].avg | |
| 75 return None | |
| 76 | |
| 77 def UpdatePerfData(self, test): | |
| 78 """Updates the persisted value in the store with test.duration.""" | |
| 79 testkey = self.GetKey(test) | |
| 80 self.RawUpdatePerfData(testkey, test.duration) | |
| 81 | |
| 82 def RawUpdatePerfData(self, testkey, duration): | |
| 83 with self.lock: | |
| 84 if testkey in self.database: | |
| 85 entry = self.database[testkey] | |
| 86 else: | |
| 87 entry = PerfDataEntry() | |
| 88 entry.AddResult(duration) | |
| 89 self.database[testkey] = entry | |
| 90 | |
| 91 | |
| 92 class PerfDataManager(object): | |
| 93 def __init__(self, datadir): | |
| 94 self.datadir = os.path.abspath(datadir) | |
| 95 if not os.path.exists(self.datadir): | |
| 96 os.makedirs(self.datadir) | |
| 97 self.stores = {} # Keyed by arch, then mode. | |
| 98 self.closed = False | |
| 99 self.lock = threading.Lock() | |
| 100 | |
| 101 def __del__(self): | |
| 102 self.close() | |
| 103 | |
| 104 def close(self): | |
| 105 if self.closed: return | |
| 106 for arch in self.stores: | |
| 107 modes = self.stores[arch] | |
| 108 for mode in modes: | |
| 109 store = modes[mode] | |
| 110 store.close() | |
| 111 self.closed = True | |
| 112 | |
| 113 def GetStore(self, arch, mode): | |
| 114 with self.lock: | |
| 115 if not arch in self.stores: | |
| 116 self.stores[arch] = {} | |
| 117 modes = self.stores[arch] | |
| 118 if not mode in modes: | |
| 119 modes[mode] = PerfDataStore(self.datadir, arch, mode) | |
| 120 return modes[mode] | |
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Chromium Code Reviews
Issue 11028027:
Revert trunk to bleeding_edge at r12484 (Closed)
Base URL: https://v8.googlecode.com/svn/trunk