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22 lines
763 B
Python
22 lines
763 B
Python
# Copyright 2013 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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from pylib import android_commands
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from pylib.device import device_utils
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class CacheControl(object):
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_DROP_CACHES = '/proc/sys/vm/drop_caches'
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def __init__(self, device):
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# TODO(jbudorick) Remove once telemetry gets switched over.
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if isinstance(device, android_commands.AndroidCommands):
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device = device_utils.DeviceUtils(device)
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self._device = device
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def DropRamCaches(self):
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"""Drops the filesystem ram caches for performance testing."""
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self._device.RunShellCommand('sync', as_root=True)
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self._device.WriteFile(CacheControl._DROP_CACHES, '3', as_root=True)
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