f39d1cd4aa
The feature sometimes prevents subsequent swarming bots to delete the work directory on windows. The data file is not kept on swarming bots anyways, therefore this switches off the feature completely. BUG=chromium:535160 LOG=n Review URL: https://codereview.chromium.org/1468933002 Cr-Commit-Position: refs/heads/master@{#32168}
147 lines
4.5 KiB
Python
147 lines
4.5 KiB
Python
# Copyright 2012 the V8 project authors. All rights reserved.
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials provided
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# with the distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived
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# from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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import os
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import shelve
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import threading
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class PerfDataEntry(object):
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def __init__(self):
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self.avg = 0.0
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self.count = 0
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def AddResult(self, result):
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kLearnRateLimiter = 99 # Greater value means slower learning.
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# We use an approximation of the average of the last 100 results here:
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# The existing average is weighted with kLearnRateLimiter (or less
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# if there are fewer data points).
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effective_count = min(self.count, kLearnRateLimiter)
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self.avg = self.avg * effective_count + result
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self.count = effective_count + 1
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self.avg /= self.count
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class PerfDataStore(object):
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def __init__(self, datadir, arch, mode):
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filename = os.path.join(datadir, "%s.%s.perfdata" % (arch, mode))
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self.database = shelve.open(filename, protocol=2)
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self.closed = False
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self.lock = threading.Lock()
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def __del__(self):
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self.close()
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def close(self):
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if self.closed: return
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self.database.close()
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self.closed = True
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def GetKey(self, test):
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"""Computes the key used to access data for the given testcase."""
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flags = "".join(test.flags)
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return str("%s.%s.%s" % (test.suitename(), test.path, flags))
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def FetchPerfData(self, test):
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"""Returns the observed duration for |test| as read from the store."""
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key = self.GetKey(test)
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if key in self.database:
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return self.database[key].avg
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return None
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def UpdatePerfData(self, test):
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"""Updates the persisted value in the store with test.duration."""
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testkey = self.GetKey(test)
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self.RawUpdatePerfData(testkey, test.duration)
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def RawUpdatePerfData(self, testkey, duration):
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with self.lock:
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if testkey in self.database:
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entry = self.database[testkey]
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else:
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entry = PerfDataEntry()
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entry.AddResult(duration)
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self.database[testkey] = entry
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class PerfDataManager(object):
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def __init__(self, datadir):
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self.datadir = os.path.abspath(datadir)
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if not os.path.exists(self.datadir):
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os.makedirs(self.datadir)
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self.stores = {} # Keyed by arch, then mode.
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self.closed = False
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self.lock = threading.Lock()
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def __del__(self):
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self.close()
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def close(self):
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if self.closed: return
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for arch in self.stores:
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modes = self.stores[arch]
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for mode in modes:
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store = modes[mode]
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store.close()
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self.closed = True
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def GetStore(self, arch, mode):
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with self.lock:
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if not arch in self.stores:
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self.stores[arch] = {}
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modes = self.stores[arch]
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if not mode in modes:
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modes[mode] = PerfDataStore(self.datadir, arch, mode)
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return modes[mode]
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class NullPerfDataStore(object):
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def UpdatePerfData(self, test):
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pass
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def FetchPerfData(self, test):
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return None
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class NullPerfDataManager(object):
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def __init__(self):
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pass
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def GetStore(self, *args, **kwargs):
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return NullPerfDataStore()
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def close(self):
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pass
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def GetPerfDataManager(context, datadir):
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if context.use_perf_data:
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return PerfDataManager(datadir)
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else:
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return NullPerfDataManager()
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