def FlushSystemCacheForDirectory(self, directory):
binary_manager.ReinstallAndroidHelperIfNeeded(
'clear_system_cache', _DEVICE_CLEAR_SYSTEM_CACHE_TOOL_LOCATION,
self._device)
self._device.RunShellCommand(
[_DEVICE_CLEAR_SYSTEM_CACHE_TOOL_LOCATION, '--recurse', directory],
as_root=True, check_return=True)
def SetGraphicsMemoryTrackingEnabled(self, enabled):
if not enabled:
self.KillApplication('memtrack_helper')
return
binary_manager.ReinstallAndroidHelperIfNeeded(
'memtrack_helper', _DEVICE_MEMTRACK_HELPER_LOCATION, self._device)
self._device.RunShellCommand([_DEVICE_MEMTRACK_HELPER_LOCATION, '-d'],
as_root=True,
check_return=True)
def PrepareDeviceForPerf(device):
"""Set up a device for running perf.
Args:
device: DeviceUtils instance identifying the target device.
Returns:
The path to the installed perf binary on the device.
"""
binary_manager.ReinstallAndroidHelperIfNeeded(
'perf', _DEVICE_PERF_LOCATION, device)
# Make sure kernel pointers are not hidden.
device.WriteFile('/proc/sys/kernel/kptr_restrict', '0', as_root=True)
return _DEVICE_PERF_LOCATION
