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Direktori : /proc/thread-self/root/lib/python2.7/site-packages/tuned/plugins/ |
Current File : //proc/thread-self/root/lib/python2.7/site-packages/tuned/plugins/plugin_audio.py |
from . import base from .decorators import * import tuned.logs from tuned.utils.commands import commands import os import struct import glob log = tuned.logs.get() cmd = commands() class AudioPlugin(base.Plugin): """ Plugin for tuning audio cards powersaving options. Power management is supported per module, not device. From this reason, we take kernel module names as device names. """ def _init_devices(self): self._devices_supported = True self._assigned_devices = set() self._free_devices = set() for device in self._hardware_inventory.get_devices("sound").match_sys_name("card*"): module_name = self._device_module_name(device) if module_name in ["snd_hda_intel", "snd_ac97_codec"]: self._free_devices.add(module_name) def _instance_init(self, instance): instance._has_static_tuning = True instance._has_dynamic_tuning = False def _instance_cleanup(self, instance): pass def _device_module_name(self, device): try: return device.parent.driver except: return None @classmethod def _get_config_options(cls): return { "timeout": 0, "reset_controller": False, } def _timeout_path(self, device): return "/sys/module/%s/parameters/power_save" % device def _reset_controller_path(self, device): return "/sys/module/%s/parameters/power_save_controller" % device @command_set("timeout", per_device = True) def _set_timeout(self, value, device, sim): try: timeout = int(value) except ValueError: log.error("timeout value '%s' is not integer" % value) return None if timeout >= 0: sys_file = self._timeout_path(device) if not sim: cmd.write_to_file(sys_file, "%d" % timeout) return timeout else: return None @command_get("timeout") def _get_timeout(self, device, ignore_missing=False): sys_file = self._timeout_path(device) value = cmd.read_file(sys_file, no_error=ignore_missing) if len(value) > 0: return value return None @command_set("reset_controller", per_device = True) def _set_reset_controller(self, value, device, sim): v = cmd.get_bool(value) sys_file = self._reset_controller_path(device) if os.path.exists(sys_file): if not sim: cmd.write_to_file(sys_file, v) return v return None @command_get("reset_controller") def _get_reset_controller(self, device, ignore_missing=False): sys_file = self._reset_controller_path(device) if os.path.exists(sys_file): value = cmd.read_file(sys_file) if len(value) > 0: return cmd.get_bool(value) return None