Run sky tests more parallelized.

sky/tools/webkitpy/layout_tests/port/base.py

 # Copyright (C) 2010 Google Inc. 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
@@ skipping 252 matching lines @@
             self._wdiff_available = self.check_wdiff(logging=False)
         return self._wdiff_available
 
     def pretty_patch_available(self):
         if self._pretty_patch_available is None:
             self._pretty_patch_available = self.check_pretty_patch(logging=False)
         return self._pretty_patch_available
 
     def default_child_processes(self):
         """Return the number of drivers to use for this port."""
-        # FIXME: See if we can reduce the denominator here without causing timeouts.
-        # Maybe we need to run one sky_shell process and multiple sky_viewers
-        # instead of multiple sky_shells
-        return int(math.ceil(float(self._executive.cpu_count()) / 4))
+        return self._executive.cpu_count()
 
     def default_max_locked_shards(self):
         """Return the number of "locked" shards to run in parallel (like the http tests)."""
         return self.default_child_processes()
 
     def baseline_path(self):
         """Return the absolute path to the directory to store new baselines in for this port."""
         # FIXME: remove once all callers are calling either baseline_version_dir() or baseline_platform_dir()
         return self.baseline_version_dir()
 
@@ skipping 1488 matching lines @@
 
 class PhysicalTestSuite(object):
     def __init__(self, base, args):
         self.name = base
         self.base = base
         self.args = args
         self.tests = set()
 
     def __repr__(self):
         return "PhysicalTestSuite('%s', '%s', %s)" % (self.name, self.base, self.args)