skpbench

tools/skpbench/skpbench.py

+#!/usr/bin/env python
+
+# Copyright 2016 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+from __future__ import print_function
+from _benchresult import BenchResult
+from argparse import ArgumentParser
+from os import path
+from queue import Queue
+from threading import Thread
+import collections
+import glob
+import math
+import re
+import subprocess
+import sys
+
+__argparse = ArgumentParser(description="""
+
+Executes the skpbench binary with various configs and skps.
+
+Also monitors the output in order to filter out and re-run results that have an
+unacceptable stddev.
+
+""")
+
+__argparse.add_argument('-p', '--path',
+    help='directory to execute ./skpbench from')
+__argparse.add_argument('-m', '--max-stddev',
+    type=float, default=4,
+    help='initial max allowable relative standard deviation')
+__argparse.add_argument('-x', '--suffix',
+    help='suffix to append on config (e.g. "_before", "_after")')
+__argparse.add_argument('-w','--write-path',
+    help='directory to save .png proofs to disk.')
+__argparse.add_argument('-v','--verbosity',
+    type=int, default=0, help='level of verbosity (0=none to 5=debug)')
+__argparse.add_argument('-n', '--samples',
+    type=int, help='number of samples to collect for each bench')
+__argparse.add_argument('-d', '--sample-ms',
+    type=int, help='duration of each sample')
+__argparse.add_argument('--fps',
+    action='store_true', help='use fps instead of ms')
+__argparse.add_argument('-c', '--config',
+    default='gpu', help='comma- or space-separated list of GPU configs')
+__argparse.add_argument('skps',
+    nargs='+',
+    help='.skp files or directories to expand for .skp files')
+
+FLAGS = __argparse.parse_args()
+
+
+class StddevException(Exception):
+  pass
+
+class Message:
+  READLINE = 0,
+  EXIT = 1
+  def __init__(self, message, value=None):
+    self.message = message
+    self.value = value
+
+class SKPBench(Thread):
+  ARGV = ['skpbench', '--verbosity', str(FLAGS.verbosity)]
+  if FLAGS.path:
+    ARGV[0] = path.join(FLAGS.path, ARGV[0])
+  if FLAGS.samples:
+    ARGV.extend(['--samples', str(FLAGS.samples)])
+  if FLAGS.sample_ms:
+    ARGV.extend(['--sampleMs', str(FLAGS.sample_ms)])
+  if FLAGS.fps:
+    ARGV.extend(['--fps', 'true'])
+
+  @classmethod
+  def print_header(cls):
+    subprocess.call(cls.ARGV + ['--samples', '0'])
+
+  def __init__(self, skp, config, max_stddev, best_result=None):
+    self.skp = skp
+    self.config = config
+    self.max_stddev = max_stddev
+    self.best_result = best_result
+    self._queue = Queue()
+    Thread.__init__(self)
+
+  def execute(self):
+    self.start()
+    while True:
+      message = self._queue.get()
+      if message.message == Message.READLINE:
+        result = BenchResult.match(message.value)
+        if result:
+          self.__process_result(result)
+        else:
+          print(message.value)
+        sys.stdout.flush()
+        continue
+      if message.message == Message.EXIT:
+        self.join()
+        break
+
+  def __process_result(self, result):
+    if not self.best_result or result.stddev <= self.best_result.stddev:
+      self.best_result = result
+    elif FLAGS.verbosity >= 1:
+      print('NOTE: reusing previous result for %s/%s with lower stddev '
+            '(%s%% instead of %s%%).' %
+            (result.config, result.bench, self.best_result.stddev,
+             result.stddev), file=sys.stderr)
+    if self.max_stddev and self.best_result.stddev > self.max_stddev:
+      raise StddevException()
+    self.best_result.print_values(config_suffix=FLAGS.suffix)
+
+  def run(self):
+    """Called on the background thread.
+
+    Launches and reads output from an skpbench process.
+
+    """
+    commandline = self.ARGV + ['--config', self.config,
+                               '--skp', self.skp,
+                               '--suppressHeader', 'true']
+    if (FLAGS.write_path):
+      pngfile = path.join(FLAGS.write_path, self.config,
+                          path.basename(self.skp) + '.png')
+      commandline.extend(['--png', pngfile])
+    if (FLAGS.verbosity >= 3):
+      print(' '.join(commandline), file=sys.stderr)
+    proc = subprocess.Popen(commandline, stdout=subprocess.PIPE)
+    for line in iter(proc.stdout.readline, b''):
+      self._queue.put(Message(Message.READLINE, line.decode('utf-8').rstrip()))
+    proc.wait()
+    self._queue.put(Message(Message.EXIT, proc.returncode))
+
+
+def main():
+  SKPBench.print_header()
+
+  # Delimiter is "," or " ", skip if nested inside parens (e.g. gpu(a=b,c=d)).
+  DELIMITER = r'[, ](?!(?:[^(]*\([^)]*\))*[^()]*\))'
+  configs = re.split(DELIMITER, FLAGS.config)
+
+  skps = list()
+  for skp in FLAGS.skps:
+    if (path.isdir(skp)):
+      skps.extend(glob.iglob(path.join(skp, '*.skp')))
+    else:
+      skps.append(skp)
+
+  benches = collections.deque([(skp, config, FLAGS.max_stddev)
+                               for skp in skps
+                               for config in configs])
+  while benches:
+    benchargs = benches.popleft()
+    skpbench = SKPBench(*benchargs)
+    try:
+      skpbench.execute()
+
+    except StddevException:
+      retry_max_stddev = skpbench.max_stddev * math.sqrt(2)
+      if FLAGS.verbosity >= 1:
+        print('NOTE: stddev too high for %s/%s (%s%%; max=%.2f%%). '
+              'Re-queuing with max=%.2f%%.' %
+              (skpbench.best_result.config, skpbench.best_result.bench,
+               skpbench.best_result.stddev, skpbench.max_stddev,
+               retry_max_stddev),
+              file=sys.stderr)
+      benches.append((skpbench.skp, skpbench.config, retry_max_stddev,
+                      skpbench.best_result))
+
+
+if __name__ == '__main__':
+  main()