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from . import base
from .decorators import *
import os
import errno
import tuned.logs
from tuned.consts import ACPI_DIR
log = tuned.logs.get()
class ACPIPlugin(base.Plugin):
"""
`acpi`::
Configures the ACPI driver.
+
The only currently supported option is
[option]`platform_profile`, which sets the ACPI
platform profile sysfs attribute,
a generic power/performance preference API for other drivers.
Multiple profiles can be specified, separated by `|`.
The first available profile is selected.
+
--
.Selecting a platform profile
====
----
[acpi]
platform_profile=balanced|low-power
----
Using this option, *TuneD* will try to set the platform profile
to `balanced`. If that fails, it will try to set it to `low-power`.
====
--
"""
def __init__(self, *args, **kwargs):
super(ACPIPlugin, self).__init__(*args, **kwargs)
@classmethod
def _get_config_options(cls):
return {"platform_profile": None}
def _instance_init(self, instance):
instance._has_static_tuning = True
instance._has_dynamic_tuning = False
def _instance_cleanup(self, instance):
pass
@classmethod
def _platform_profile_choices_path(cls):
return os.path.join(ACPI_DIR, "platform_profile_choices")
@classmethod
def _platform_profile_path(cls):
return os.path.join(ACPI_DIR, "platform_profile")
@command_set("platform_profile")
def _set_platform_profile(self, profiles, sim, remove):
if not os.path.isfile(self._platform_profile_path()):
log.debug("ACPI platform_profile is not supported on this system")
return None
profiles = [profile.strip() for profile in profiles.split('|')]
avail_profiles = set(self._cmd.read_file(self._platform_profile_choices_path()).split())
for profile in profiles:
if profile in avail_profiles:
if not sim:
log.info("Setting platform_profile to '%s'" % profile)
self._cmd.write_to_file(self._platform_profile_path(), profile, \
no_error=[errno.ENOENT] if remove else False)
return profile
log.warn("Requested platform_profile '%s' unavailable" % profile)
log.error("Failed to set platform_profile. Is the value in the profile correct?")
return None
@command_get("platform_profile")
def _get_platform_profile(self, ignore_missing=False):
if not os.path.isfile(self._platform_profile_path()):
log.debug("ACPI platform_profile is not supported on this system")
return None
return self._cmd.read_file(self._platform_profile_path()).strip()