Add m-esr52 at 52.6.0

1 files changed, 120 insertions, 0 deletions

diff --git a/media/webrtc/trunk/build/android/pylib/perf_tests_helper.py b/media/webrtc/trunk/build/android/pylib/perf_tests_helper.py
new file mode 100644
index 000000000..c0a3ee413
--- /dev/null
+++ b/media/webrtc/trunk/build/android/pylib/perf_tests_helper.py
@@ -0,0 +1,120 @@
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import re
+
+import android_commands
+import math
+
+# Valid values of result type.
+RESULT_TYPES = {'unimportant': 'RESULT ',
+                'default': '*RESULT ',
+                'informational': ''}
+
+
+def _EscapePerfResult(s):
+  """Escapes |s| for use in a perf result."""
+  # Colons (:) and equal signs (=) are not allowed, and we chose an arbitrary
+  # limit of 40 chars.
+  return re.sub(':|=', '_', s[:40])
+
+
+def PrintPerfResult(measurement, trace, values, units, result_type='default',
+                    print_to_stdout=True):
+  """Prints numerical data to stdout in the format required by perf tests.
+
+  The string args may be empty but they must not contain any colons (:) or
+  equals signs (=).
+
+  Args:
+    measurement: A description of the quantity being measured, e.g. "vm_peak".
+    trace: A description of the particular data point, e.g. "reference".
+    values: A list of numeric measured values.
+    units: A description of the units of measure, e.g. "bytes".
+    result_type: A  tri-state that accepts values of ['unimportant', 'default',
+        'informational']. 'unimportant' prints RESULT, 'default' prints *RESULT
+        and 'informational' prints nothing.
+    print_to_stdout: If True, prints the output in stdout instead of returning
+        the output to caller.
+
+    Returns:
+      String of the formated perf result.
+  """
+  assert result_type in RESULT_TYPES, 'result type: %s is invalid' % result_type
+
+  assert isinstance(values, list)
+  assert len(values)
+  assert '/' not in measurement
+  avg = None
+  sd = None
+  if len(values) > 1:
+    try:
+      value = '[%s]' % ','.join([str(v) for v in values])
+      avg = sum([float(v) for v in values]) / len(values)
+      sqdiffs = [(float(v) - avg) ** 2 for v in values]
+      variance = sum(sqdiffs) / (len(values) - 1)
+      sd = math.sqrt(variance)
+    except ValueError:
+      value = ", ".join(values)
+  else:
+    value = values[0]
+
+  trace_name = _EscapePerfResult(trace)
+  output = '%s%s: %s%s%s %s' % (
+    RESULT_TYPES[result_type],
+    _EscapePerfResult(measurement),
+    trace_name,
+    # Do not show equal sign if the trace is empty. Usually it happens when
+    # measurement is enough clear to describe the result.
+    '= ' if trace_name else '',
+    value,
+    units)
+  if avg:
+    output += '\nAvg %s: %f%s' % (measurement, avg, units)
+  if sd:
+    output += '\nSd  %s: %f%s' % (measurement, sd, units)
+  if print_to_stdout:
+    print output
+  return output
+
+
+class PerfTestSetup(object):
+  """Provides methods for setting up a device for perf testing."""
+  _DROP_CACHES = '/proc/sys/vm/drop_caches'
+  _SCALING_GOVERNOR = '/sys/devices/system/cpu/cpu%d/cpufreq/scaling_governor'
+
+  def __init__(self, adb):
+    self._adb = adb
+    num_cpus = self._adb.GetFileContents('/sys/devices/system/cpu/online',
+                                         log_result=False)
+    assert num_cpus, 'Unable to find /sys/devices/system/cpu/online'
+    self._num_cpus = int(num_cpus[0].split('-')[-1])
+    self._original_scaling_governor = None
+
+  def DropRamCaches(self):
+    """Drops the filesystem ram caches for performance testing."""
+    if not self._adb.IsRootEnabled():
+      self._adb.EnableAdbRoot()
+    self._adb.RunShellCommand('sync')
+    self._adb.RunShellCommand('echo 3 > ' + PerfTestSetup._DROP_CACHES)
+
+  def SetUp(self):
+    """Sets up performance tests."""
+    if not self._original_scaling_governor:
+      self._original_scaling_governor = self._adb.GetFileContents(
+          PerfTestSetup._SCALING_GOVERNOR % 0,
+          log_result=False)[0]
+      self._SetScalingGovernorInternal('performance')
+    self.DropRamCaches()
+
+  def TearDown(self):
+    """Tears down performance tests."""
+    if self._original_scaling_governor:
+      self._SetScalingGovernorInternal(self._original_scaling_governor)
+    self._original_scaling_governor = None
+
+  def _SetScalingGovernorInternal(self, value):
+    for cpu in range(self._num_cpus):
+      self._adb.RunShellCommand(
+          ('echo %s > ' + PerfTestSetup._SCALING_GOVERNOR) % (value, cpu))