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

Issue 2101243005: Add a snapshot of flutter/engine/src/build to our sdk (Closed) Base URL: git@github.com:dart-lang/sdk.git@master
Patch Set: add README.dart Created 4 years, 5 months ago
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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.
4
5 from pylib import android_commands
6 from pylib.device import device_utils
7
8 class CacheControl(object):
9 _DROP_CACHES = '/proc/sys/vm/drop_caches'
10
11 def __init__(self, device):
12 # TODO(jbudorick) Remove once telemetry gets switched over.
13 if isinstance(device, android_commands.AndroidCommands):
14 device = device_utils.DeviceUtils(device)
15 self._device = device
16
17 def DropRamCaches(self):
18 """Drops the filesystem ram caches for performance testing."""
19 self._device.RunShellCommand('sync', as_root=True)
20 self._device.WriteFile(CacheControl._DROP_CACHES, '3', as_root=True)
21
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