# Copyright 2013 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. | |
class CacheControl(object): | |
_DROP_CACHES = '/proc/sys/vm/drop_caches' | |
def __init__(self, device): | |
self._device = device | |
def DropRamCaches(self): | |
"""Drops the filesystem ram caches for performance testing.""" | |
self._device.RunShellCommand('sync', as_root=True) | |
self._device.WriteFile(CacheControl._DROP_CACHES, '3', as_root=True) | |