1 # Copyright 2013 The Chromium Authors. All rights reserved.
2 # Use of this source code is governed by a BSD-style license that can be
3 # found in the LICENSE file.
6 class CacheControl(object):
7 _DROP_CACHES = '/proc/sys/vm/drop_caches'
9 def __init__(self, adb):
12 def DropRamCaches(self):
13 """Drops the filesystem ram caches for performance testing."""
14 self._adb.RunShellCommandWithSU('sync')
15 self._adb.SetProtectedFileContents(CacheControl._DROP_CACHES, '3')