def _get_max_temperature(self):
"""Get temperature of hottest sensor in Celsius.
@returns float of temperature of hottest sensor.
"""
temperature = utils.get_current_temperature_max()
if not temperature:
temperature = 0
return temperature
def __init__(self):
self._service_stopper = None
# Keep a copy of the current state for cleanup.
self._temperature_init = utils.get_current_temperature_max()
self._temperature_critical = utils.get_temperature_critical()
self._original_governors = utils.set_high_performance_mode()
self._error_reason = None
if not utils.wait_for_idle_cpu(60.0, 0.1):
self._error_reason = 'Could not get idle CPU.'
return
if not utils.wait_for_cool_machine():
self._error_reason = 'Could not get cold machine.'
return
self._temperature_cold = utils.get_current_temperature_max()
self._temperature_max = self._temperature_cold
threading.Thread(target=self._monitor_performance_state).start()
# Should be last just in case we had a runaway process.
self._stop_thermal_throttling()
def _monitor_performance_state(self):
"""
Checks machine temperature once per second.
TODO(ihf): make this more intelligent with regards to governor,
CPU, GPU and maybe zram as needed.
"""
while True:
time.sleep(1)
current_temperature = utils.get_current_temperature_max()
self._temperature_max = max(self._temperature_max,
current_temperature)
# TODO(ihf): Remove this spew once PerfControl is stable.
logging.info('PerfControl CPU temperature = %.1f',
current_temperature)
def get_current_temperature_max(self):
"""
Returns the highest reported board temperature (all sensors) in Celsius.
"""
return utils.get_current_temperature_max()