Add a script for calibrating settings for timing configurations.

Update the timings scripts with calibrated settings that run
a full build between 9.5 and 10.0 seconds on the buildbot slave.

1 files changed, 76 insertions, 0 deletions

diff --git a/bin/calibrate.py b/bin/calibrate.py
new file mode 100644
index 00000000..c1b4f115
--- /dev/null
+++ b/bin/calibrate.py
@@ -0,0 +1,76 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2009 The SCons Foundation
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+import optparse
+import os
+import re
+import subprocess
+import sys
+
+variable_re = re.compile('^VARIABLE: (.*)$', re.M)
+elapsed_re = re.compile('^ELAPSED: (.*)$', re.M)
+
+def main(argv=None):
+    if argv is None:
+        argv = sys.argv
+
+    parser = optparse.OptionParser(usage="calibrate.py [-h] [--min time] [--max time] timings/*/*-run.py")
+    parser.add_option('--min', type='float', default=9.5,
+                      help="minimum acceptable execution time (default 9.5)")
+    parser.add_option('--max', type='float', default=10.00,
+                      help="maximum acceptable execution time (default 10.00)")
+    opts, args = parser.parse_args(argv[1:])
+
+    os.environ['TIMESCONS_CALIBRATE'] = '1'
+
+    for arg in args:
+        if len(args) > 1:
+            print arg + ':'
+
+        command = [sys.executable, 'runtest.py', '--noqmtest', arg]
+
+        run = 1
+        good = 0
+        while good < 3:
+            p = subprocess.Popen(command,
+                                 stdout=subprocess.PIPE,
+                                 stderr=subprocess.STDOUT)
+            output = p.communicate()[0]
+            vm = variable_re.search(output)
+            em = elapsed_re.search(output)
+            elapsed = float(em.group(1))
+            print "run %3d: %7.3f:  %s" % (run, elapsed, ' '.join(vm.groups()))
+            if opts.min < elapsed and elapsed < opts.max:
+                good += 1
+            else:
+                good = 0
+                for v in vm.groups():
+                    var, value = v.split('=', 1)
+                    value = int((int(value) * opts.max) / elapsed)
+                    os.environ[var] = str(value)
+            run += 1
+
+    return 0
+
+if __name__ == "__main__":
+    sys.exit(main())