First commit of new tools/run-tests.py

tools/testrunner/network/distro.py

Index: tools/testrunner/network/distro.py
diff --git a/tools/testrunner/network/distro.py b/tools/testrunner/network/distro.py
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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)