build/android/pylib/perf/cache_control.py - Issue 358993003: [Android] Switch to DeviceUtils versions of file functions.

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Side by Side Diff: build/android/pylib/perf/cache_control.py

Issue 358993003: [Android] Switch to DeviceUtils versions of file functions. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Created 6 years, 5 months ago

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1 # Copyright 2013 The Chromium Authors. All rights reserved.	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	2 # Use of this source code is governed by a BSD-style license that can be

3 # found in the LICENSE file.	3 # found in the LICENSE file.

4	4

5 from pylib import android_commands	5 from pylib import android_commands

6 from pylib.device import device_utils	6 from pylib.device import device_utils

7	7

8 class CacheControl(object):	8 class CacheControl(object):

9 _DROP_CACHES = '/proc/sys/vm/drop_caches'	9 _DROP_CACHES = '/proc/sys/vm/drop_caches'

10	10

11 def __init__(self, device):	11 def __init__(self, device):

12 # TODO(jbudorick) Remove once telemetry gets switched over.	12 # TODO(jbudorick) Remove once telemetry gets switched over.

13 if isinstance(device, android_commands.AndroidCommands):	13 if isinstance(device, android_commands.AndroidCommands):

14 device = device_utils.DeviceUtils(device)	14 device = device_utils.DeviceUtils(device)

15 self._device = device	15 self._device = device

16	16

17 def DropRamCaches(self):	17 def DropRamCaches(self):

18 """Drops the filesystem ram caches for performance testing."""	18 """Drops the filesystem ram caches for performance testing."""

19 self._device.RunShellCommand('sync', as_root=True)	19 self._device.RunShellCommand('sync', as_root=True)

20 self._device.old_interface.SetProtectedFileContents(	20 self._device.WriteFile(CacheControl._DROP_CACHES, '3', as_root=True)

21 CacheControl._DROP_CACHES, '3')

22	21

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