73 lines
2.6 KiB
Python
73 lines
2.6 KiB
Python
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# Copyright (c) 2012 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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import logging
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class ThermalThrottle(object):
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"""Class to detect and track thermal throttling
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Usage:
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Wait for IsThrottled() to be False before running test
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After running test call HasBeenThrottled() to find out if the
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test run was affected by thermal throttling.
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Currently assumes an OMap device.
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"""
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def __init__(self, adb):
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self._adb = adb
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self._throttled = False
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def HasBeenThrottled(self):
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""" True if there has been any throttling since the last call to
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HasBeenThrottled or IsThrottled
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"""
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return self._ReadLog()
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def IsThrottled(self):
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"""True if currently throttled"""
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self._ReadLog()
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return self._throttled
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def _ReadLog(self):
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has_been_throttled = False
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serial_number = self._adb.Adb().GetSerialNumber()
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log = self._adb.RunShellCommand('dmesg -c')
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degree_symbol = unichr(0x00B0)
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for line in log:
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if 'omap_thermal_throttle' in line:
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if not self._throttled:
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logging.warning('>>> Device %s Thermally Throttled', serial_number)
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self._throttled = True
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has_been_throttled = True
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if 'omap_thermal_unthrottle' in line:
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if self._throttled:
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logging.warning('>>> Device %s Thermally Unthrottled', serial_number)
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self._throttled = False
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has_been_throttled = True
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if 'throttle_delayed_work_fn' in line:
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temp = float([s for s in line.split() if s.isdigit()][0]) / 1000.0
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logging.info(u' Device %s Thermally Thottled at %3.1f%sC',
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serial_number, temp, degree_symbol)
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if logging.getLogger().isEnabledFor(logging.DEBUG):
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# Print temperature of CPU SoC.
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omap_temp_file = ('/sys/devices/platform/omap/omap_temp_sensor.0/'
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'temperature')
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if self._adb.FileExistsOnDevice(omap_temp_file):
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tempdata = self._adb.GetFileContents(omap_temp_file)
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temp = float(tempdata[0]) / 1000.0
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logging.debug(u'Current OMAP Temperature of %s = %3.1f%sC',
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serial_number, temp, degree_symbol)
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# Print temperature of battery, to give a system temperature
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dumpsys_log = self._adb.RunShellCommand('dumpsys battery')
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for line in dumpsys_log:
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if 'temperature' in line:
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btemp = float([s for s in line.split() if s.isdigit()][0]) / 10.0
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logging.debug(u'Current battery temperature of %s = %3.1f%sC',
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serial_number, btemp, degree_symbol)
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return has_been_throttled
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