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# Copyright 2012 the V8 project authors. All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
class Shell(object):
def __init__(self, shell):
self.shell = shell
self.tests = []
self.total_duration = 0.0
def AddSuite(self, suite):
self.tests += suite.tests
self.total_duration += suite.total_duration
def SortTests(self):
self.tests.sort(cmp=lambda x, y: cmp(x.duration, y.duration))
def Assign(suites, peers):
total_work = 0.0
for s in suites:
total_work += s.CalculateTotalDuration()
total_power = 0.0
for p in peers:
p.assigned_work = 0.0
total_power += p.jobs * p.relative_performance
for p in peers:
p.needed_work = total_work * p.jobs * p.relative_performance / total_power
shells = {}
for s in suites:
shell = s.shell()
if not shell in shells:
shells[shell] = Shell(shell)
shells[shell].AddSuite(s)
# Convert |shells| to list and sort it, shortest total_duration first.
shells = [ shells[s] for s in shells ]
shells.sort(cmp=lambda x, y: cmp(x.total_duration, y.total_duration))
# Sort tests within each shell, longest duration last (so it's
# pop()'ed first).
for s in shells: s.SortTests()
# Sort peers, least needed_work first.
peers.sort(cmp=lambda x, y: cmp(x.needed_work, y.needed_work))
index = 0
for shell in shells:
while len(shell.tests) > 0:
while peers[index].needed_work <= 0:
index += 1
if index == len(peers):
print("BIG FAT WARNING: Assigning tests to peers failed. "
"Remaining tests: %d. Going to slow mode." % len(shell.tests))
# Pick the least-busy peer. Sorting the list for each test
# is terribly slow, but this is just an emergency fallback anyway.
peers.sort(cmp=lambda x, y: cmp(x.needed_work, y.needed_work))
peers[0].ForceAddOneTest(shell.tests.pop(), shell)
# If the peer already has a shell assigned and would need this one
# and then yet another, try to avoid it.
peer = peers[index]
if (shell.total_duration < peer.needed_work and
len(peer.shells) > 0 and
index < len(peers) - 1 and
shell.total_duration <= peers[index + 1].needed_work):
peers[index + 1].AddTests(shell)
else:
peer.AddTests(shell)