blob: 620b7143dd40fcbe67a384a8f3a621c53c2b77b1 [file] [log] [blame]
# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import collections
import contextlib
import ctypes
import fcntl
import glob
import itertools
import json
import logging
import math
import numpy
import os
import re
import struct
import threading
import time
from autotest_lib.client.bin import utils
from autotest_lib.client.common_lib import error, enum
from autotest_lib.client.cros import kernel_trace
from autotest_lib.client.cros.power import power_utils
BatteryDataReportType = enum.Enum('CHARGE', 'ENERGY')
# battery data reported at 1e6 scale
# number of times to retry reading the battery in the case of bad data
# default filename when saving CheckpointLogger data to file
CHECKPOINT_LOG_DEFAULT_FNAME = 'checkpoint_log.json'
class DevStat(object):
Device power status. This class implements generic status initialization
and parsing routines.
def __init__(self, fields, path=None):
self.fields = fields
self.path = path
def reset_fields(self):
Reset all class fields to None to mark their status as unknown.
for field in self.fields.iterkeys():
setattr(self, field, None)
def read_val(self, file_name, field_type):
"""Read a value from file.
path = file_name
if not file_name.startswith('/'):
path = os.path.join(self.path, file_name)
f = open(path, 'r')
out = f.readline().rstrip('\n')
val = field_type(out)
return val
return field_type(0)
def read_all_vals(self):
"""Read all values.
for field, prop in self.fields.iteritems():
if prop[0]:
val = self.read_val(prop[0], prop[1])
setattr(self, field, val)
def update(self):
"""Update the DevStat.
Need to implement in subclass.
class ThermalStatACPI(DevStat):
ACPI-based thermal status.
(All temperatures are in millidegrees Celsius.)
str enabled: Whether thermal zone is enabled
int temp: Current temperature
str type: Thermal zone type
int num_trip_points: Number of thermal trip points that activate
cooling devices
int num_points_tripped: Temperature is above this many trip points
str trip_point_N_type: Trip point #N's type
int trip_point_N_temp: Trip point #N's temperature value
int cdevX_trip_point: Trip point o cooling device #X (index)
thermal_fields = {
'enabled': ['enabled', str],
'temp': ['temp', int],
'type': ['type', str],
'num_points_tripped': ['', '']
path = '/sys/class/thermal/thermal_zone*'
def __init__(self, path=None):
# Browse the thermal folder for trip point fields.
self.num_trip_points = 0
thermal_fields = glob.glob(path + '/*')
for file in thermal_fields:
field = file[len(path + '/'):]
if field.find('trip_point') != -1:
if field.find('temp'):
field_type = int
field_type = str
self.thermal_fields[field] = [field, field_type]
# Count the number of trip points.
if field.find('_type') != -1:
self.num_trip_points += 1
super(ThermalStatACPI, self).__init__(self.thermal_fields, path)
def update(self):
if not os.path.exists(self.path):
self.num_points_tripped = 0
for field in self.thermal_fields:
if field.find('trip_point_') != -1 and field.find('_temp') != -1 \
and self.temp > self.read_val(field, int):
self.num_points_tripped += 1'Temperature trip point #' + \
field[len('trip_point_'):field.rfind('_temp')] + \
' tripped.')
class ThermalStatHwmon(DevStat):
hwmon-based thermal status.
int <tname>_temp<num>_input: Current temperature in millidegrees Celsius
<tname> : name of hwmon device in sysfs
<num> : number of temp as some hwmon devices have multiple
path = '/sys/class/hwmon'
thermal_fields = {}
def __init__(self, rootpath=None):
if not rootpath:
rootpath = self.path
for subpath1 in glob.glob('%s/hwmon*' % rootpath):
for subpath2 in ['','device/']:
gpaths = glob.glob("%s/%stemp*_input" % (subpath1, subpath2))
for gpath in gpaths:
bname = os.path.basename(gpath)
field_path = os.path.join(subpath1, subpath2, bname)
tname_path = os.path.join(os.path.dirname(gpath), "name")
tname = utils.read_one_line(tname_path)
field_key = "%s_%s" % (tname, bname)
self.thermal_fields[field_key] = [field_path, int]
super(ThermalStatHwmon, self).__init__(self.thermal_fields, rootpath)
def update(self):
if not os.path.exists(self.path):
def read_val(self, file_name, field_type):
path = os.path.join(self.path, file_name)
f = open(path, 'r')
out = f.readline()
return field_type(out)
return field_type(0)
class ThermalStat(object):
"""helper class to instantiate various thermal devices."""
def __init__(self):
self._thermals = []
self.min_temp = 999999999
self.max_temp = -999999999
thermal_stat_types = [(ThermalStatHwmon.path, ThermalStatHwmon),
(ThermalStatACPI.path, ThermalStatACPI)]
for thermal_glob_path, thermal_type in thermal_stat_types:
thermal_path = glob.glob(thermal_glob_path)[0]
logging.debug('Using %s for thermal info.', thermal_path)
logging.debug('Could not find thermal path %s, skipping.',
def get_temps(self):
"""Get temperature readings.
string of temperature readings.
temp_str = ''
for thermal in self._thermals:
for kname in thermal.fields:
if kname is 'temp' or kname.endswith('_input'):
val = getattr(thermal, kname)
temp_str += '%s:%d ' % (kname, val)
if val > self.max_temp:
self.max_temp = val
if val < self.min_temp:
self.min_temp = val
return temp_str
class BatteryStat(DevStat):
Battery status.
float charge_full: Last full capacity reached [Ah]
float charge_full_design: Full capacity by design [Ah]
float charge_now: Remaining charge [Ah]
float current_now: Battery discharge rate [A]
float energy: Current battery charge [Wh]
float energy_full: Last full capacity reached [Wh]
float energy_full_design: Full capacity by design [Wh]
float energy_rate: Battery discharge rate [W]
float power_now: Battery discharge rate [W]
float remaining_time: Remaining discharging time [h]
float voltage_min_design: Minimum voltage by design [V]
float voltage_max_design: Maximum voltage by design [V]
float voltage_now: Voltage now [V]
battery_fields = {
'status': ['status', str],
'charge_full': ['charge_full', float],
'charge_full_design': ['charge_full_design', float],
'charge_now': ['charge_now', float],
'current_now': ['current_now', float],
'voltage_min_design': ['voltage_min_design', float],
'voltage_max_design': ['voltage_max_design', float],
'voltage_now': ['voltage_now', float],
'energy': ['energy_now', float],
'energy_full': ['energy_full', float],
'energy_full_design': ['energy_full_design', float],
'power_now': ['power_now', float],
'present': ['present', int],
'energy_rate': ['', ''],
'remaining_time': ['', '']
def __init__(self, path=None):
super(BatteryStat, self).__init__(self.battery_fields, path)
def update(self):
for _ in xrange(BATTERY_RETRY_COUNT):
except error.TestError as e:
for field, prop in self.battery_fields.iteritems():
logging.warn(field + ': ' + repr(getattr(self, field)))
raise error.TestError('Failed to read battery state')
def _read_battery(self):
if self.charge_full == 0 and self.energy_full != 0:
battery_type = BatteryDataReportType.ENERGY
battery_type = BatteryDataReportType.CHARGE
if self.voltage_min_design != 0:
voltage_nominal = self.voltage_min_design
voltage_nominal = self.voltage_now
if voltage_nominal == 0:
raise error.TestError('Failed to determine battery voltage')
# Since charge data is present, calculate parameters based upon
# reported charge data.
if battery_type == BatteryDataReportType.CHARGE:
self.charge_full = self.charge_full / BATTERY_DATA_SCALE
self.charge_full_design = self.charge_full_design / \
self.charge_now = self.charge_now / BATTERY_DATA_SCALE
self.current_now = math.fabs(self.current_now) / \
BATTERY_DATA_SCALE = voltage_nominal * \
self.charge_now / \
self.energy_full = voltage_nominal * \
self.charge_full / \
self.energy_full_design = voltage_nominal * \
self.charge_full_design / \
# Charge data not present, so calculate parameters based upon
# reported energy data.
elif battery_type == BatteryDataReportType.ENERGY:
self.charge_full = self.energy_full / voltage_nominal
self.charge_full_design = self.energy_full_design / \
self.charge_now = / voltage_nominal
# TODO(shawnn): check if power_now can really be reported
# as negative, in the same way current_now can
self.current_now = math.fabs(self.power_now) / \
voltage_nominal = / BATTERY_DATA_SCALE
self.energy_full = self.energy_full / BATTERY_DATA_SCALE
self.energy_full_design = self.energy_full_design / \
self.voltage_min_design = self.voltage_min_design / \
self.voltage_max_design = self.voltage_max_design / \
self.voltage_now = self.voltage_now / \
voltage_nominal = voltage_nominal / \
self.energy_rate = self.voltage_now * self.current_now
self.remaining_time = 0
if self.current_now and self.energy_rate:
self.remaining_time = / self.energy_rate
if self.charge_full > (self.charge_full_design * 1.5):
raise error.TestError('Unreasonable charge_full value')
if self.charge_now > (self.charge_full_design * 1.5):
raise error.TestError('Unreasonable charge_now value')
class LineStatDummy(DevStat):
Dummy line stat for devices which don't provide power_supply related sysfs
def __init__(self): = True
def update(self):
class LineStat(DevStat):
Power line status.
bool online: Line power online
linepower_fields = {
'is_online': ['online', int],
'status': ['status', str]
def __init__(self, path=None):
super(LineStat, self).__init__(self.linepower_fields, path)
logging.debug("line path: %s", path)
def update(self):
self.read_all_vals() = self.is_online == 1
class SysStat(object):
System power status for a given host.
battery: A list of BatteryStat objects.
linepower: A list of LineStat objects.
psu_types = ['Mains', 'USB', 'USB_ACA', 'USB_C', 'USB_CDP', 'USB_DCP',
'USB_PD', 'USB_PD_DRP', 'Unknown']
def __init__(self):
power_supply_path = '/sys/class/power_supply/*'
self.battery = None
self.linepower = []
self.thermal = None
self.battery_path = None
self.linepower_path = []
power_supplies = glob.glob(power_supply_path)
for path in power_supplies:
type_path = os.path.join(path,'type')
if not os.path.exists(type_path):
power_type = utils.read_one_line(type_path)
if power_type == 'Battery':
scope_path = os.path.join(path,'scope')
if (os.path.exists(scope_path) and
utils.read_one_line(scope_path) == 'Device'):
self.battery_path = path
elif power_type in self.psu_types:
if not self.battery_path or not self.linepower_path:
logging.warning("System does not provide power sysfs interface")
self.thermal = ThermalStat()
def refresh(self):
Initialize device power status objects.
self.linepower = []
if self.battery_path:
self.battery = [ BatteryStat(self.battery_path) ]
for path in self.linepower_path:
if not self.linepower:
self.linepower = [ LineStatDummy() ]
temp_str = self.thermal.get_temps()
if temp_str:'Temperature reading: ' + temp_str)
logging.error('Could not read temperature, skipping.')
def on_ac(self):
Returns true if device is currently running from AC power.
on_ac = False
for linepower in self.linepower:
on_ac |=
# Butterfly can incorrectly report AC online for some time after
# unplug. Check battery discharge state to confirm.
if utils.get_board() == 'butterfly':
on_ac &= (not self.battery_discharging())
return on_ac
def ac_charging(self):
Returns true if device is currently charging from AC power.
charging = False
for linepower in self.linepower:
charging |= (linepower.status == 'Charging')
return charging
def battery_discharging(self):
Returns true if battery is currently discharging or false otherwise.
if not self.battery_path:
logging.warn('Unable to determine battery discharge status')
return False
return(self.battery[0].status.rstrip() == 'Discharging')
def battery_discharge_ok_on_ac(self):
"""Returns True if battery is ok to discharge on AC presently.
some devices cycle between charge & discharge above a certain
SoC. If AC is charging and SoC > 95% we can safely assume that.
return self.ac_charging() and (self.percent_current_charge() > 95)
def percent_current_charge(self):
"""Returns current charge compare to design capacity in percent.
return self.battery[0].charge_now * 100 / \
def assert_battery_state(self, percent_initial_charge_min):
"""Check initial power configuration state is battery.
percent_initial_charge_min: float between 0 -> 1.00 of
percentage of battery that must be remaining.
None|0|False means check not performed.
TestError: if one of battery assertions fails
if self.on_ac():
raise error.TestError(
'Running on AC power. Please remove AC power cable.')
percent_initial_charge = self.percent_current_charge()
if percent_initial_charge_min and percent_initial_charge < \
raise error.TestError('Initial charge (%f) less than min (%f)'
% (percent_initial_charge, percent_initial_charge_min))
def get_status():
Return a new power status object (SysStat). A new power status snapshot
for a given host can be obtained by either calling this routine again and
constructing a new SysStat object, or by using the refresh method of the
SysStat object.
status = SysStat()
return status
class AbstractStats(object):
Common superclass for measurements of percentages per state over time.
Public Attributes:
incremental: If False, stats returned are from a single
_read_stats. Otherwise, stats are from the difference between
the current and last refresh.
def to_percent(stats):
Turns a dict with absolute time values into a dict with percentages.
total = sum(stats.itervalues())
if total == 0:
return {k: 0 for k in stats}
return dict((k, v * 100.0 / total) for (k, v) in stats.iteritems())
def do_diff(new, old):
Returns a dict with value deltas from two dicts with matching keys.
return dict((k, new[k] - old.get(k, 0)) for k in new.iterkeys())
def format_results_percent(results, name, percent_stats):
Formats autotest result keys to format:
for key in percent_stats:
results['percent_%s_%s_time' % (name, key)] = percent_stats[key]
def format_results_wavg(results, name, wavg):
Add an autotest result keys to format: wavg_<name>
if wavg is not None:
results['wavg_%s' % (name)] = wavg
def __init__(self, name=None, incremental=True):
if not name:
error.TestFail("Need to name AbstractStats instance please.") = name
self.incremental = incremental
self._stats = self._read_stats()
def refresh(self):
Returns dict mapping state names to percentage of time spent in them.
raw_stats = result = self._read_stats()
if self.incremental:
result = self.do_diff(result, self._stats)
self._stats = raw_stats
return self.to_percent(result)
def _automatic_weighted_average(self):
Turns a dict with absolute times (or percentages) into a weighted
average value.
total = sum(self._stats.itervalues())
if total == 0:
return None
return sum((float(k)*v) / total for (k, v) in self._stats.iteritems())
def _supports_automatic_weighted_average(self):
Returns True if stats collected can be automatically converted from
percent distribution to weighted average. False otherwise.
return False
def weighted_average(self):
Return weighted average calculated using the automated average method
(if supported) or using a custom method defined by the stat.
if self._supports_automatic_weighted_average():
return self._automatic_weighted_average()
return self._weighted_avg_fn()
def _weighted_avg_fn(self):
Override! Custom weighted average function.
Returns weighted average as a single floating point value.
return None
def _read_stats(self):
Override! Reads the raw data values that shall be measured into a dict.
raise NotImplementedError('Override _read_stats in the subclass!')
CPU_BASE_PATH = '/sys/devices/system/cpu/'
def get_all_cpus():
Retrieve all numbers of 'cpu\d+' files under |CPU_BASE_PATH|.
cpu_entry_re = re.compile(r'cpu(\d+)')
cpus = []
for f in os.listdir(CPU_BASE_PATH):
match = cpu_entry_re.match(f)
if match:
return frozenset(cpus)
def get_cpus_filepaths_for_suffix(cpus, suffix):
For each cpu in |cpus| check whether |CPU_BASE_PATH|/cpu%d/|suffix| exists.
Return tuple of two lists t:
t[0]: all cpu ids where the condition above holds
t[1]: all full paths where condition above holds.
available_cpus = []
available_paths = []
for c in cpus:
c_file_path = os.path.join(CPU_BASE_PATH, 'cpu%d' % c, suffix)
if os.path.exists(c_file_path):
return (available_cpus, available_paths)
class CPUFreqStats(AbstractStats):
CPU Frequency statistics
MSR_IA32_MPERF = 0xe7
MSR_IA32_APERF = 0xe8
def __init__(self, cpus=None):
name = 'cpufreq'
stats_suffix = 'cpufreq/stats/time_in_state'
key_suffix = 'cpufreq/scaling_available_frequencies'
intel_pstate_msr_path = '/dev/cpu/*/msr'
all_cpus = get_all_cpus()
if not cpus:
cpus = all_cpus
cpus, self._file_paths = get_cpus_filepaths_for_suffix(cpus,
if len(cpus) and len(cpus) < len(all_cpus):
name = '%s_%s' % (name, '_'.join([str(c) for c in cpus]))
_, cpufreq_key_paths = get_cpus_filepaths_for_suffix(cpus, key_suffix)
intel_pstate_msr_paths = glob.glob(intel_pstate_msr_path)
self._running_intel_pstate = False
self._initial_perf = None
self._current_perf = None
self._max_freq = 0
if not self._file_paths:
logging.debug('time_in_state file not found')
if intel_pstate_msr_paths:
logging.debug('intel_pstate msr file found')
self._num_cpus = len(intel_pstate_msr_paths)
self._running_intel_pstate = True
self._available_freqs = set()
for path in cpufreq_key_paths:
self._available_freqs |= set(int(x) for x in
super(CPUFreqStats, self).__init__(name=name)
def _read_stats(self):
if self._running_intel_pstate:
aperf = 0
mperf = 0
for cpu in range(self._num_cpus):
aperf += utils.rdmsr(self.MSR_IA32_APERF, cpu)
mperf += utils.rdmsr(self.MSR_IA32_MPERF, cpu)
# max_freq is supposed to be the same for all CPUs and remain
# constant throughout. So, we set the entry only once.
# Note that this is max non-turbo frequency, some CPU can run at
# higher turbo frequency in some condition.
if not self._max_freq:
platform_info = utils.rdmsr(self.MSR_PLATFORM_INFO)
mul = platform_info >> 8 & 0xff
bclk = utils.get_intel_bclk_khz()
self._max_freq = mul * bclk
if not self._initial_perf:
self._initial_perf = (aperf, mperf)
self._current_perf = (aperf, mperf)
stats = dict((k, 0) for k in self._available_freqs)
for path in self._file_paths:
if not os.path.exists(path):
logging.debug('%s is not found', path)
data = utils.read_file(path)
for line in data.splitlines():
pair = line.split()
freq = int(pair[0])
timeunits = int(pair[1])
if freq in stats:
stats[freq] += timeunits
stats[freq] = timeunits
return stats
def _supports_automatic_weighted_average(self):
return not self._running_intel_pstate
def _weighted_avg_fn(self):
if not self._running_intel_pstate:
return None
if self._current_perf[1] != self._initial_perf[1]:
# Avg freq = max_freq * aperf_delta / mperf_delta
return self._max_freq * \
float(self._current_perf[0] - self._initial_perf[0]) / \
(self._current_perf[1] - self._initial_perf[1])
return 1.0
class CPUCStateStats(AbstractStats):
Base class for C-state residency statistics
def __init__(self, name, non_c0_stat=''):
self._non_c0_stat = non_c0_stat
super(CPUCStateStats, self).__init__(name=name)
def to_percent(self, stats):
Turns a dict with absolute time values into a dict with percentages.
Ignore the |non_c0_stat_name| which is aggegate stat in the total count.
total = sum(v for k, v in stats.iteritems() if k != self._non_c0_stat)
if total == 0:
return {k: 0 for k in stats}
return {k: v * 100.0 / total for k, v in stats.iteritems()}
class CPUIdleStats(CPUCStateStats):
CPU Idle statistics (refresh() will not work with incremental=False!)
# TODO (snanda): Handle changes in number of c-states due to events such
# as ac <-> battery transitions.
# TODO (snanda): Handle non-S0 states. Time spent in suspend states is
# currently not factored out.
def __init__(self, cpus=None):
name = 'cpuidle'
cpuidle_suffix = 'cpuidle'
all_cpus = get_all_cpus()
if not cpus:
cpus = all_cpus
cpus, self._cpus = get_cpus_filepaths_for_suffix(cpus, cpuidle_suffix)
if len(cpus) and len(cpus) < len(all_cpus):
name = '%s_%s' % (name, '_'.join([str(c) for c in cpus]))
super(CPUIdleStats, self).__init__(name=name, non_c0_stat='non-C0')
def _read_stats(self):
cpuidle_stats = collections.defaultdict(int)
epoch_usecs = int(time.time() * 1000 * 1000)
for cpu in self._cpus:
state_path = os.path.join(cpu, 'state*')
states = glob.glob(state_path)
cpuidle_stats['C0'] += epoch_usecs
for state in states:
name = utils.read_one_line(os.path.join(state, 'name'))
latency = utils.read_one_line(os.path.join(state, 'latency'))
if not int(latency) and name == 'POLL':
# C0 state. Kernel stats aren't right, so calculate by
# subtracting all other states from total time (using epoch
# timer since we calculate differences in the end anyway).
# NOTE: Only x86 lists C0 under cpuidle, ARM does not.
usecs = int(utils.read_one_line(os.path.join(state, 'time')))
cpuidle_stats['C0'] -= usecs
if name == '<null>':
# Kernel race condition that can happen while a new C-state
# gets added (e.g. AC->battery). Don't know the 'name' of
# the state yet, but its 'time' would be 0 anyway.
logging.warning('Read name: <null>, time: %d from %s'
% (usecs, state) + '... skipping.')
cpuidle_stats[name] += usecs
cpuidle_stats['non-C0'] += usecs
return cpuidle_stats
class CPUPackageStats(CPUCStateStats):
Package C-state residency statistics for modern Intel CPUs.
ATOM = {'C2': 0x3F8, 'C4': 0x3F9, 'C6': 0x3FA}
NEHALEM = {'C3': 0x3F8, 'C6': 0x3F9, 'C7': 0x3FA}
SANDY_BRIDGE = {'C2': 0x60D, 'C3': 0x3F8, 'C6': 0x3F9, 'C7': 0x3FA}
SILVERMONT = {'C6': 0x3FA}
GOLDMONT = {'C2': 0x60D, 'C3': 0x3F8, 'C6': 0x3F9,'C10': 0x632}
BROADWELL = {'C2': 0x60D, 'C3': 0x3F8, 'C6': 0x3F9, 'C7': 0x3FA,
'C8': 0x630, 'C9': 0x631,'C10': 0x632}
def __init__(self):
def _get_platform_states():
Helper to decide what set of microarchitecture-specific MSRs to use.
Returns: dict that maps C-state name to MSR address, or None.
cpu_uarch = utils.get_intel_cpu_uarch()
return {
# model groups pulled from Intel SDM, volume 4
# Group same package cstate using the older uarch name
# TODO(harry.pan): As the keys represent microarchitecture
# names, we could consider to rename the PC state groups
# to avoid ambiguity.
'Airmont': self.SILVERMONT,
'Atom': self.ATOM,
'Broadwell': self.BROADWELL,
'Goldmont': self.GOLDMONT,
'Haswell': self.SANDY_BRIDGE,
'Ivy Bridge': self.SANDY_BRIDGE,
'Ivy Bridge-E': self.SANDY_BRIDGE,
'Kaby Lake': self.BROADWELL,
'Nehalem': self.NEHALEM,
'Sandy Bridge': self.SANDY_BRIDGE,
'Silvermont': self.SILVERMONT,
'Skylake': self.BROADWELL,
'Westmere': self.NEHALEM,
}.get(cpu_uarch, None)
self._platform_states = _get_platform_states()
super(CPUPackageStats, self).__init__(name='cpupkg',
def _read_stats(self):
packages = set()
template = '/sys/devices/system/cpu/cpu%s/topology/physical_package_id'
if not self._platform_states:
return {}
stats = dict((state, 0) for state in self._platform_states)
stats['C0_C1'] = 0
stats['non-C0_C1'] = 0
for cpu in os.listdir('/dev/cpu'):
if not os.path.exists(template % cpu):
package = utils.read_one_line(template % cpu)
if package in packages:
stats['C0_C1'] += utils.rdmsr(0x10, cpu) # TSC
for (state, msr) in self._platform_states.iteritems():
ticks = utils.rdmsr(msr, cpu)
stats[state] += ticks
stats['non-C0_C1'] += ticks
stats['C0_C1'] -= ticks
return stats
class DevFreqStats(AbstractStats):
Devfreq device frequency stats.
_DIR = '/sys/class/devfreq'
def __init__(self, f):
"""Constructs DevFreqStats Object that track frequency stats
for the path of the given Devfreq device.
The frequencies for devfreq devices are listed in Hz.
path: the path to the devfreq device
self._path = os.path.join(self._DIR, f)
if not os.path.exists(self._path):
raise error.TestError('DevFreqStats: devfreq device does not exist')
fname = os.path.join(self._path, 'available_frequencies')
af = utils.read_one_line(fname).strip()
self._available_freqs = sorted(af.split(), key=int)
super(DevFreqStats, self).__init__(name=f)
def _read_stats(self):
stats = dict((freq, 0) for freq in self._available_freqs)
fname = os.path.join(self._path, 'trans_stat')
with open(fname) as fd:
# The lines that contain the time in each frequency start on the 3rd
# line, so skip the first 2 lines. The last line contains the number
# of transitions, so skip that line too.
# The time in each frequency is at the end of the line.
freq_pattern = re.compile(r'\d+(?=:)')
for line in fd.readlines()[2:-1]:
freq =
if freq and in self._available_freqs:
stats[] = int(line.strip().split()[-1])
return stats
class GPUFreqStats(AbstractStats):
"""GPU Frequency statistics class.
TODO(tbroch): add stats for other GPUs
_MALI_DEV = '/sys/class/misc/mali0/device'
_MALI_EVENTS = ['mali_dvfs:mali_dvfs_set_clock']
r'kworker.* (\d+\.\d+): mali_dvfs_set_clock: frequency=(\d+)\d{6}'
_I915_ROOT = '/sys/kernel/debug/dri/0'
_I915_EVENTS = ['i915:intel_gpu_freq_change']
_I915_CLKS_FILES = ['i915_cur_delayinfo', 'i915_frequency_info']
_I915_TRACE_CLK_RE = \
r'kworker.* (\d+\.\d+): intel_gpu_freq_change: new_freq=(\d+)'
_I915_CUR_FREQ_RE = r'CAGF:\s+(\d+)MHz'
_I915_MIN_FREQ_RE = r'Lowest \(RPN\) frequency:\s+(\d+)MHz'
_I915_MAX_FREQ_RE = r'Max non-overclocked \(RP0\) frequency:\s+(\d+)MHz'
# There are 6 frequency steps per 100 MHz
_I915_FREQ_STEPS = [0, 17, 33, 50, 67, 83]
_gpu_type = None
def _get_mali_freqs(self):
"""Get mali clocks based on kernel version.
For 3.8-3.18:
# cat /sys/class/misc/mali0/device/clock
# cat /sys/class/misc/mali0/device/available_frequencies
For 4.4+:
Tracked in DevFreqStats
cur_mhz: string of current GPU clock in mhz
cur_mhz = None
fqs = []
fname = os.path.join(self._MALI_DEV, 'clock')
if os.path.exists(fname):
cur_mhz = str(int(int(utils.read_one_line(fname).strip()) / 1e6))
fname = os.path.join(self._MALI_DEV, 'available_frequencies')
with open(fname) as fd:
for ln in fd.readlines():
freq = int(int(ln.strip()) / 1e6)
self._freqs = fqs
return cur_mhz
def __init__(self, incremental=False):
min_mhz = None
max_mhz = None
cur_mhz = None
events = None
i915_path = None
self._freqs = []
self._prev_sample = None
self._trace = None
if os.path.exists(self._MALI_DEV) and \
not os.path.exists(os.path.join(self._MALI_DEV, "devfreq")):
for file_name in self._I915_CLKS_FILES:
full_path = os.path.join(self._I915_ROOT, file_name)
if os.path.exists(full_path):
i915_path = full_path
# We either don't know how to track GPU stats (yet) or the stats
# are tracked in DevFreqStats.
logging.debug("gpu_type is %s", self._gpu_type)
if self._gpu_type is 'mali':
events = self._MALI_EVENTS
cur_mhz = self._get_mali_freqs()
if self._freqs:
min_mhz = self._freqs[0]
max_mhz = self._freqs[-1]
elif self._gpu_type is 'i915':
events = self._I915_EVENTS
with open(i915_path) as fd:
for ln in fd.readlines():
logging.debug("ln = %s", ln)
result = re.findall(self._I915_CUR_FREQ_RE, ln)
if result:
cur_mhz = result[0]
result = re.findall(self._I915_MIN_FREQ_RE, ln)
if result:
min_mhz = result[0]
result = re.findall(self._I915_MAX_FREQ_RE, ln)
if result:
max_mhz = result[0]
if min_mhz and max_mhz:
for i in xrange(int(min_mhz), int(max_mhz) + 1):
if i % 100 in self._I915_FREQ_STEPS:
logging.debug("cur_mhz = %s, min_mhz = %s, max_mhz = %s", cur_mhz,
min_mhz, max_mhz)
if cur_mhz and min_mhz and max_mhz:
self._trace = kernel_trace.KernelTrace(events=events)
# Not all platforms or kernel versions support tracing.
if not self._trace or not self._trace.is_tracing():
logging.warning("GPU frequency tracing not enabled.")
self._prev_sample = (cur_mhz, self._trace.uptime_secs())
logging.debug("Current GPU freq: %s", cur_mhz)
logging.debug("All GPU freqs: %s", self._freqs)
super(GPUFreqStats, self).__init__(name='gpu', incremental=incremental)
def _set_gpu_type(cls, gpu_type):
cls._gpu_type = gpu_type
def _read_stats(self):
if self._gpu_type:
return getattr(self, "_%s_read_stats" % self._gpu_type)()
return {}
def _trace_read_stats(self, regexp):
"""Read GPU stats from kernel trace outputs.
regexp: regular expression to match trace output for frequency
Dict with key string in mhz and val float in seconds.
if not self._prev_sample:
return {}
stats = dict((k, 0.0) for k in self._freqs)
results =
for (tstamp_str, freq) in results:
tstamp = float(tstamp_str)
# do not reparse lines in trace buffer
if tstamp <= self._prev_sample[1]:
delta = tstamp - self._prev_sample[1]
logging.debug("freq:%s tstamp:%f - %f delta:%f",
tstamp, self._prev_sample[1],
stats[self._prev_sample[0]] += delta
self._prev_sample = (freq, tstamp)
# Do last record
delta = self._trace.uptime_secs() - self._prev_sample[1]
logging.debug("freq:%s tstamp:uptime - %f delta:%f",
self._prev_sample[1], delta)
stats[self._prev_sample[0]] += delta
logging.debug("GPU freq percents:%s", stats)
return stats
def _mali_read_stats(self):
"""Read Mali GPU stats
Frequencies are reported in Hz, so use a regex that drops the last 6
Output in trace looks like this:
kworker/u:24-5220 [000] .... 81060.329232: mali_dvfs_set_clock: frequency=400
kworker/u:24-5220 [000] .... 81061.830128: mali_dvfs_set_clock: frequency=350
Dict with frequency in mhz as key and float in seconds for time
spent at that frequency.
return self._trace_read_stats(self._MALI_TRACE_CLK_RE)
def _i915_read_stats(self):
"""Read i915 GPU stats.
Output looks like this (kernel >= 3.8):
kworker/u:0-28247 [000] .... 259391.579610: intel_gpu_freq_change: new_freq=400
kworker/u:0-28247 [000] .... 259391.581797: intel_gpu_freq_change: new_freq=350
Dict with frequency in mhz as key and float in seconds for time
spent at that frequency.
return self._trace_read_stats(self._I915_TRACE_CLK_RE)
def _supports_automatic_weighted_average(self):
return self._gpu_type is not None
class USBSuspendStats(AbstractStats):
USB active/suspend statistics (over all devices)
# TODO (snanda): handle hot (un)plugging of USB devices
# TODO (snanda): handle duration counters wraparound
def __init__(self):
usb_stats_path = '/sys/bus/usb/devices/*/power'
self._file_paths = glob.glob(usb_stats_path)
if not self._file_paths:
logging.debug('USB stats path not found')
super(USBSuspendStats, self).__init__(name='usb')
def _read_stats(self):
usb_stats = {'active': 0, 'suspended': 0}
for path in self._file_paths:
active_duration_path = os.path.join(path, 'active_duration')
total_duration_path = os.path.join(path, 'connected_duration')
if not os.path.exists(active_duration_path) or \
not os.path.exists(total_duration_path):
logging.debug('duration paths do not exist for: %s', path)
active = int(utils.read_file(active_duration_path))
total = int(utils.read_file(total_duration_path))
logging.debug('device %s active for %.2f%%',
path, active * 100.0 / total)
usb_stats['active'] += active
usb_stats['suspended'] += total - active
return usb_stats
def get_cpu_sibling_groups():
Get CPU core groups in HMP systems.
In systems with both small core and big core,
returns groups of small and big sibling groups.
siblings_suffix = 'topology/core_siblings_list'
sibling_groups = []
cpus_processed = set()
cpus, sibling_file_paths = get_cpus_filepaths_for_suffix(get_all_cpus(),
for c, siblings_path in zip(cpus, sibling_file_paths):
if c in cpus_processed:
# This cpu is already part of a sibling group. Skip.
siblings_data = utils.read_file(siblings_path)
sibling_group = set()
for sibling_entry in siblings_data.split(','):
entry_data = sibling_entry.split('-')
sibling_start = sibling_end = int(entry_data[0])
if len(entry_data) > 1:
sibling_end = int(entry_data[1])
siblings = set(range(sibling_start, sibling_end + 1))
sibling_group |= siblings
cpus_processed |= sibling_group
return tuple(sibling_groups)
def get_available_cpu_stats():
"""Return CPUFreq/CPUIdleStats groups by big-small siblings groups."""
ret = [CPUPackageStats()]
cpu_sibling_groups = get_cpu_sibling_groups()
if not cpu_sibling_groups:
for cpu_group in cpu_sibling_groups:
return ret
class StatoMatic(object):
"""Class to aggregate and monitor a bunch of power related statistics."""
def __init__(self):
self._start_uptime_secs = kernel_trace.KernelTrace.uptime_secs()
self._astats = [USBSuspendStats(), GPUFreqStats(incremental=False)]
if os.path.isdir(DevFreqStats._DIR):
self._astats.extend([DevFreqStats(f) for f in \
self._disk = DiskStateLogger()
def publish(self):
"""Publishes results of various statistics gathered.
dict with
key = string 'percent_<name>_<key>_time'
value = float in percent
results = {}
tot_secs = kernel_trace.KernelTrace.uptime_secs() - \
for stat_obj in self._astats:
percent_stats = stat_obj.refresh()
logging.debug("pstats = %s", percent_stats)
if is 'gpu':
# TODO(tbroch) remove this once GPU freq stats have proved
# reliable
stats_secs = sum(stat_obj._stats.itervalues())
if stats_secs < (tot_secs * 0.9) or \
stats_secs > (tot_secs * 1.1):
logging.warning('%s stats dont look right. Not publishing.',
new_res = {}
wavg = stat_obj.weighted_average()
if wavg:
AbstractStats.format_results_wavg(new_res,, wavg)
new_res = {}
if self._disk.get_error():
new_res['disk_logging_error'] = str(self._disk.get_error())
AbstractStats.format_results_percent(new_res, 'disk',
return results
class PowerMeasurement(object):
"""Class to measure power.
Public attributes:
domain: String name of the power domain being measured. Example is
'system' for total system power
Public methods:
refresh: Performs any power/energy sampling and calculation and returns
power as float in watts. This method MUST be implemented in
def __init__(self, domain):
self.domain = domain
def refresh(self):
"""Performs any power/energy sampling and calculation.
MUST be implemented in subclass
float, power in watts.
raise NotImplementedError("'refresh' method should be implemented in "
def parse_power_supply_info():
"""Parses power_supply_info command output.
Command output from power_manager ( tools/ ) looks like
Device: Line Power
path: /sys/class/power_supply/cros_ec-charger
Device: Battery
path: /sys/class/power_supply/sbs-9-000b
rv = collections.defaultdict(dict)
dev = None
for ln in utils.system_output('power_supply_info').splitlines():
logging.debug("psu: %s", ln)
result = re.findall(r'^Device:\s+(.*)', ln)
if result:
dev = result[0]
result = re.findall(r'\s+(.+):\s+(.+)', ln)
if result and dev:
kname = re.findall(r'(.*)\s+\(\w+\)', result[0][0])
if kname:
rv[dev][kname[0]] = result[0][1]
rv[dev][result[0][0]] = result[0][1]
return rv
class SystemPower(PowerMeasurement):
"""Class to measure system power.
TODO(tbroch): This class provides a subset of functionality in BatteryStat
in hopes of minimizing power draw. Investigate whether its really
significant and if not, deprecate.
Private Attributes:
_voltage_file: path to retrieve voltage in uvolts
_current_file: path to retrieve current in uamps
def __init__(self, battery_dir):
battery_dir: path to dir containing the files to probe and log.
usually something like /sys/class/power_supply/BAT0/
super(SystemPower, self).__init__('system')
# Files to log voltage and current from
self._voltage_file = os.path.join(battery_dir, 'voltage_now')
self._current_file = os.path.join(battery_dir, 'current_now')
def refresh(self):
"""refresh method.
See superclass PowerMeasurement for details.
keyvals = parse_power_supply_info()
return float(keyvals['Battery']['energy rate'])
class CheckpointLogger(object):
"""Class to log checkpoint data.
Public attributes:
checkpoint_data: dictionary of (tname, tlist).
tname: String of testname associated with these time intervals
tlist: list of tuples. Tuple contains:
tstart: Float of time when subtest started
tend: Float of time when subtest ended
Public methods:
start: records a start timestamp
Static methods:
Private attributes:
_start_time: start timestamp for checkpoint logger
def __init__(self):
self.checkpoint_data = collections.defaultdict(list)
# If multiple MeasurementLoggers call start() on the same CheckpointLogger,
# the latest one will register start time.
def start(self):
"""Set start time for CheckpointLogger."""
self._start_time = time.time()
def checkblock(self, tname=''):
"""Check point for the following block with test tname.
tname: String of testname associated with this time interval
start_time = time.time()
self.checkpoint(tname, start_time)
def checkpoint(self, tname='', tstart=None, tend=None):
"""Check point the times in seconds associated with test tname.
tname: String of testname associated with this time interval
tstart: Float in seconds of when tname test started. Should be based
off time.time(). If None, use start timestamp for the checkpoint
tend: Float in seconds of when tname test ended. Should be based
off time.time(). If None, then value computed in the method.
if not tstart and self._start_time:
tstart = self._start_time
if not tend:
tend = time.time()
self.checkpoint_data[tname].append((tstart, tend))'Finished test "%s" between timestamps [%s, %s]',
tname, tstart, tend)
def convert_relative(self, start_time=None):
"""Convert data from power_status.CheckpointLogger object to relative
checkpoint data dictionary. Timestamps are converted to time in seconds
since the test started.
start_time: Float in seconds of the desired start time reference.
Should be based off time.time(). If None, use start timestamp
for the checkpoint logger.
if start_time is None:
start_time = self._start_time
checkpoint_dict = {}
for tname, tlist in self.checkpoint_data.iteritems():
checkpoint_dict[tname] = [(tstart - start_time, tend - start_time)
for tstart, tend in tlist]
return checkpoint_dict
def save_checkpoint_data(self, resultsdir, fname=CHECKPOINT_LOG_DEFAULT_FNAME):
"""Save checkpoint data.
resultsdir: String, directory to write results to
fname: String, name of file to write results to
fname = os.path.join(resultsdir, fname)
with file(fname, 'wt') as f:
json.dump(self.checkpoint_data, f, indent=4, separators=(',', ': '))
def load_checkpoint_data(self, resultsdir,
"""Load checkpoint data.
resultsdir: String, directory to load results from
fname: String, name of file to load results from
fname = os.path.join(resultsdir, fname)
with open(fname, 'r') as f:
self.checkpoint_data = json.load(f,
# Set start time to the earliest start timestamp in file.
self._start_time = min(
ts_pair[0] for ts_pair in itertools.chain.from_iterable(
except Exception as exc:
logging.warning('Failed to load checkpoint data from json file %s, '
'see exception: %s', fname, exc)
def load_checkpoint_data_static(resultsdir,
"""Load checkpoint data.
resultsdir: String, directory to load results from
fname: String, name of file to load results from
fname = os.path.join(resultsdir, fname)
with file(fname, 'r') as f:
checkpoint_data = json.load(f)
return checkpoint_data
def to_checkpoint_data(json_dict):
"""Helper method to translate json object into CheckpointLogger format.
json_dict: a json object in the format of python dict
a defaultdict in CheckpointLogger data format
checkpoint_data = collections.defaultdict(list)
for tname, tlist in json_dict.iteritems():
checkpoint_data[tname].extend([tuple(ts_pair) for ts_pair in tlist])
return checkpoint_data
def get_checkpoint_logger_from_file(resultsdir,
"""Create a CheckpointLogger and load checkpoint data from file.
resultsdir: String, directory to load results from
fname: String, name of file to load results from
CheckpointLogger with data from file
checkpoint_logger = CheckpointLogger()
checkpoint_logger.load_checkpoint_data(resultsdir, fname)
return checkpoint_logger
class MeasurementLogger(threading.Thread):
"""A thread that logs measurement readings.
Example code snippet:
my_logger = MeasurementLogger([Measurement1, Measurement2])
for testname in tests:
# Option 1: use checkblock
with my_logger.checkblock(testname):
# run the test method for testname
# Option 2: use checkpoint
start_time = time.time()
# run the test method for testname
my_logger.checkpoint(testname, start_time)
keyvals = my_logger.calc()
or using CheckpointLogger:
checkpoint_logger = CheckpointLogger()
my_logger = MeasurementLogger([Measurement1, Measurement2],
for testname in tests:
# Option 1: use checkblock
with checkpoint_logger.checkblock(testname):
# run the test method for testname
# Option 2: use checkpoint
start_time = time.time()
# run the test method for testname
checkpoint_logger.checkpoint(testname, start_time)
keyvals = my_logger.calc()
Public attributes:
seconds_period: float, probing interval in seconds.
readings: list of lists of floats of measurements.
times: list of floats of time (since Epoch) of when measurements
occurred. len(time) == len(readings).
done: flag to stop the logger.
domains: list of domain strings being measured
Public methods:
run: launches the thread to gather measurements
refresh: perform data samplings for every measurements
calc: calculates
Private attributes:
_measurements: list of Measurement objects to be sampled.
_checkpoint_data: dictionary of (tname, tlist).
tname: String of testname associated with these time intervals
tlist: list of tuples. Tuple contains:
tstart: Float of time when subtest started
tend: Float of time when subtest ended
_results: list of results tuples. Tuple contains:
prefix: String of subtest
mean: Float of mean in watts
std: Float of standard deviation of measurements
tstart: Float of time when subtest started
tend: Float of time when subtest ended
def __init__(self, measurements, seconds_period=1.0, checkpoint_logger=None):
"""Initialize a logger.
_measurements: list of Measurement objects to be sampled.
seconds_period: float, probing interval in seconds. Default 1.0
self.seconds_period = seconds_period
self.readings = []
self.times = [] = []
self._measurements = measurements
for meas in self._measurements:
self._checkpoint_logger = \
checkpoint_logger if checkpoint_logger else CheckpointLogger()
self.done = False
def start(self):
super(MeasurementLogger, self).start()
def refresh(self):
"""Perform data samplings for every measurements.
list of sampled data for every measurements.
readings = []
for meas in self._measurements:
return readings
def run(self):
"""Threads run method."""
loop = 0
start_time = time.time()
while(not self.done):
# TODO (dbasehore): We probably need proper locking in this file
# since there have been race conditions with modifying and accessing
# data.
current_time = time.time()
loop += 1
next_measurement_time = start_time + loop * self.seconds_period
time.sleep(next_measurement_time - current_time)
def checkblock(self, tname=''):
"""Check point for the following block with test tname.
tname: String of testname associated with this time interval
start_time = time.time()
self.checkpoint(tname, start_time)
def checkpoint(self, tname='', tstart=None, tend=None):
"""Just a thin method calling the CheckpointLogger checkpoint method.
tname: String of testname associated with this time interval
tstart: Float in seconds of when tname test started. Should be based
off time.time()
tend: Float in seconds of when tname test ended. Should be based
off time.time(). If None, then value computed in the method.
self._checkpoint_logger.checkpoint(tname, tstart, tend)
# TODO(seankao): It might be useful to pull this method to CheckpointLogger,
# to allow checkpoint usage without an explicit MeasurementLogger.
def calc(self, mtype=None):
"""Calculate average measurement during each of the sub-tests.
Method performs the following steps:
1. Signals the thread to stop running.
2. Calculates mean, max, min, count on the samples for each of the
3. Stores results to be written later.
4. Creates keyvals for autotest publishing.
mtype: string of measurement type. For example:
pwr == power
temp == temperature
dict of keyvals suitable for autotest results.
if not mtype:
mtype = 'meas'
t = numpy.array(self.times)
keyvals = {}
results = [('domain', 'mean', 'std', 'duration (s)', 'start ts',
'end ts')]
# TODO(coconutruben): ensure that values is meaningful i.e. go through
# the Loggers and add a unit attribute to each so that the raw
# data is readable.
raw_results = [('domain', 'values (%s)' % mtype)]
if not self.done:
self.done = True
# times 2 the sleep time in order to allow for readings as well.
self.join(timeout=self.seconds_period * 2)
if not self._checkpoint_logger.checkpoint_data:
for i, domain_readings in enumerate(zip(*self.readings)):
meas = numpy.array(domain_readings)
domain =[i]
for tname, tlist in self._checkpoint_logger.checkpoint_data.iteritems():
if tname:
prefix = '%s_%s' % (tname, domain)
prefix = domain
keyvals[prefix+'_duration'] = 0
# Select all readings taken between tstart and tend
# timestamps in tlist.
masks = []
for tstart, tend in tlist:
keyvals[prefix+'_duration'] += tend - tstart
# Try block just in case
# is not fixed.
masks.append(numpy.logical_and(tstart < t, t < tend))
except ValueError, e:
logging.debug('Error logging measurements: %s', str(e))
logging.debug('timestamps %d %s', t.len, t)
logging.debug('timestamp start, end %f %f', tstart, tend)
logging.debug('measurements %d %s', meas.len, meas)
mask = numpy.logical_or.reduce(masks)
meas_array = meas[mask]
# If sub-test terminated early, avoid calculating avg, std and
# min
if not meas_array.size:
meas_mean = meas_array.mean()
meas_std = meas_array.std()
# Results list can be used for pretty printing and saving as csv
# TODO(seankao): new results format?
result = (prefix, meas_mean, meas_std)
for tstart, tend in tlist:
result = result + (tend - tstart, tstart, tend)
raw_results.append((prefix,) + tuple(meas_array.tolist()))
keyvals[prefix + '_' + mtype + '_avg'] = meas_mean
keyvals[prefix + '_' + mtype + '_cnt'] = meas_array.size
keyvals[prefix + '_' + mtype + '_max'] = meas_array.max()
keyvals[prefix + '_' + mtype + '_min'] = meas_array.min()
keyvals[prefix + '_' + mtype + '_std'] = meas_std
self._results = results
self._raw_results = raw_results
return keyvals
def save_results(self, resultsdir, fname_prefix=None):
"""Save computed results in a nice tab-separated format.
This is useful for long manual runs.
resultsdir: String, directory to write results to
fname_prefix: prefix to use for fname. If provided outfiles
will be [fname]_[raw|summary].txt
if not fname_prefix:
fname_prefix = 'meas_results_%.0f' % time.time()
fname = '%s_summary.txt' % fname_prefix
raw_fname = fname.replace('summary', 'raw')
for name, data in [(fname, self._results),
(raw_fname, self._raw_results)]:
with open(os.path.join(resultsdir, name), 'wt') as f:
# First row contains the headers
f.write('%s\n' % '\t'.join(data[0]))
for row in data[1:]:
# First column name, rest are numbers. See _calc_power()
fmt_row = [row[0]] + ['%.2f' % x for x in row[1:]]
f.write('%s\n' % '\t'.join(fmt_row))
class CPUStatsLogger(MeasurementLogger):
"""Class to measure CPU Frequency and CPU Idle Stats.
CPUStatsLogger derived from MeasurementLogger class but overload data
samplings method because MeasurementLogger assumed that each sampling is
independent to each other. However, in this case it is not. For example,
CPU time spent in C0 state is measure by time not spent in all other states.
CPUStatsLogger also collects the weight average in each time period if the
underlying AbstractStats support weight average function.
Private attributes:
_stats: list of CPU AbstractStats objects to be sampled.
_refresh_count: number of times refresh() has been called.
_last_wavg: dict of wavg when refresh() was last called.
def __init__(self, seconds_period=1.0, checkpoint_logger=None):
"""Initialize a CPUStatsLogger.
seconds_period: float, probing interval in seconds. Default 1.0
# We don't use measurements since CPU stats can't measure separately.
super(CPUStatsLogger, self).__init__([], seconds_period, checkpoint_logger)
self._stats = get_available_cpu_stats()
self._stats.append(GPUFreqStats()) = []
for stat in self._stats:[ + '_' + str(state_name)
for state_name in stat.refresh()])
if stat.weighted_average():'wavg_' +
self._refresh_count = 0
self._last_wavg = collections.defaultdict(int)
def refresh(self):
self._refresh_count += 1
count = self._refresh_count
ret = []
for stat in self._stats:
wavg = stat.weighted_average()
if wavg:
if stat.incremental:
last_wavg = self._last_wavg[]
self._last_wavg[] = wavg
# Calculate weight average in this period using current
# total weight average and last total weight average.
# The result will lose some precision with higher number of
# count but still good enough for 11 significant digits even
# if we logged the data every 1 second for a day.
ret.append(wavg * count - last_wavg * (count - 1))
return ret
def save_results(self, resultsdir, fname_prefix=None):
if not fname_prefix:
fname_prefix = 'cpu_results_%.0f' % time.time()
super(CPUStatsLogger, self).save_results(resultsdir, fname_prefix)
class PowerLogger(MeasurementLogger):
"""Class to measure power consumption.
def save_results(self, resultsdir, fname_prefix=None):
if not fname_prefix:
fname_prefix = 'power_results_%.0f' % time.time()
super(PowerLogger, self).save_results(resultsdir, fname_prefix)
def calc(self, mtype='pwr'):
return super(PowerLogger, self).calc(mtype)
class TempMeasurement(object):
"""Class to measure temperature.
Public attributes:
domain: String name of the temperature domain being measured. Example is
'cpu' for cpu temperature
Private attributes:
_path: Path to temperature file to read ( in millidegrees Celsius )
Public methods:
refresh: Performs any temperature sampling and calculation and returns
temperature as float in degrees Celsius.
def __init__(self, domain, path):
self.domain = domain
self._path = path
def refresh(self):
"""Performs temperature
float, temperature in degrees Celsius
return int(utils.read_one_line(self._path)) / 1000.
class BatteryTempMeasurement(TempMeasurement):
"""Class to measure battery temperature."""
def __init__(self):
super(BatteryTempMeasurement, self).__init__('battery', 'battery_temp')
def refresh(self):
"""Perform battery temperature reading.
float, temperature in degrees Celsius.
result =, timeout=5, ignore_status=True)
return float(result.stdout)
def has_battery_temp():
"""Determine if DUT can provide battery temperature.
Boolean, True if battery temperature available. False otherwise.
if not power_utils.has_battery():
return False
btemp = BatteryTempMeasurement()
except ValueError:
return False
return True
class TempLogger(MeasurementLogger):
"""A thread that logs temperature readings in millidegrees Celsius."""
def __init__(self, measurements, seconds_period=30.0, checkpoint_logger=None):
if not measurements:
domains = set()
measurements = []
tstats = ThermalStatHwmon()
for kname in tstats.fields:
match = re.match(r'(\S+)_temp(\d+)_input', kname)
if not match:
domain = + '-t' +
fpath = tstats.fields[kname][0]
new_meas = TempMeasurement(domain, fpath)
if has_battery_temp():
sysfs_paths = '/sys/class/thermal/thermal_zone*'
paths = glob.glob(sysfs_paths)
for path in paths:
domain_path = os.path.join(path, 'type')
temp_path = os.path.join(path, 'temp')
domain = utils.read_one_line(domain_path)
# Skip when thermal_zone and hwmon have same domain.
if domain in domains:
domain = domain.replace(' ', '_')
new_meas = TempMeasurement(domain, temp_path)
super(TempLogger, self).__init__(measurements, seconds_period, checkpoint_logger)
def save_results(self, resultsdir, fname_prefix=None):
if not fname_prefix:
fname_prefix = 'temp_results_%.0f' % time.time()
super(TempLogger, self).save_results(resultsdir, fname_prefix)
def calc(self, mtype='temp'):
return super(TempLogger, self).calc(mtype)
class DiskStateLogger(threading.Thread):
"""Records the time percentages the disk stays in its different power modes.
Example code snippet:
mylogger = power_status.DiskStateLogger()
result = mylogger.result()
Public methods:
start: Launches the thread and starts measurements.
result: Stops the thread if it's still running and returns measurements.
get_error: Returns the exception in _error if it exists.
Private functions:
_get_disk_state: Returns the disk's current ATA power mode as a string.
Private attributes:
_seconds_period: Disk polling interval in seconds.
_stats: Dict that maps disk states to seconds spent in them.
_running: Flag that is True as long as the logger should keep running.
_time: Timestamp of last disk state reading.
_device_path: The file system path of the disk's device node.
_error: Contains a TestError exception if an unexpected error occured
def __init__(self, seconds_period = 5.0, device_path = None):
"""Initializes a logger.
seconds_period: Disk polling interval in seconds. Default 5.0
device_path: The path of the disk's device node. Default '/dev/sda'
self._seconds_period = seconds_period
self._device_path = device_path
self._stats = {}
self._running = False
self._error = None
result = utils.system_output('rootdev -s')
# TODO(tbroch) Won't work for emmc storage and will throw this error in
# keyvals : 'ioctl(SG_IO) error: [Errno 22] Invalid argument'
# Lets implement something complimentary for emmc
if not device_path:
self._device_path = \
re.sub('(sd[a-z]|mmcblk[0-9]+)p?[0-9]+', '\\1', result)
logging.debug("device_path = %s", self._device_path)
def start(self):
logging.debug("inside DiskStateLogger.start")
if os.path.exists(self._device_path):
logging.debug("DiskStateLogger started")
super(DiskStateLogger, self).start()
def _get_disk_state(self):
"""Checks the disk's power mode and returns it as a string.
This uses the SG_IO ioctl to issue a raw SCSI command data block with
the ATA-PASS-THROUGH command that allows SCSI-to-ATA translation (see
T10 document 04-262r8). The ATA command issued is CHECKPOWERMODE1,
which returns the device's current power mode.
def _addressof(obj):
"""Shortcut to return the memory address of an object as integer."""
return ctypes.cast(obj, ctypes.c_void_p).value
scsi_cdb = struct.pack("12B", # SCSI command data block (uint8[12])
0xa1, # SCSI opcode: ATA-PASS-THROUGH
3 << 1, # protocol: Non-data
1 << 5, # flags: CK_COND
0, # features
0, # sector count
0, 0, 0, # LBA
1 << 6, # flags: ATA-USING-LBA
0xe5, # ATA opcode: CHECKPOWERMODE1
0, # reserved
0, # control (no idea what this is...)
scsi_sense = (ctypes.c_ubyte * 32)() # SCSI sense buffer (uint8[32])
sgio_header = struct.pack("iiBBHIPPPIIiPBBBBHHiII", # see <scsi/sg.h>
83, # Interface ID magic number (int32)
-1, # data transfer direction: none (int32)
12, # SCSI command data block length (uint8)
32, # SCSI sense data block length (uint8)
0, # iovec_count (not applicable?) (uint16)
0, # data transfer length (uint32)
0, # data block pointer
_addressof(scsi_cdb), # SCSI CDB pointer
_addressof(scsi_sense), # sense buffer pointer
500, # timeout in milliseconds (uint32)
0, # flags (uint32)
0, # pack ID (unused) (int32)
0, # user data pointer (unused)
0, 0, 0, 0, 0, 0, 0, 0, 0, # output params
with open(self._device_path, 'r') as dev:
result = fcntl.ioctl(dev, 0x2285, sgio_header)
except IOError, e:
raise error.TestError('ioctl(SG_IO) error: %s' % str(e))
_, _, _, _, status, host_status, driver_status = \
struct.unpack("4x4xxx2x4xPPP4x4x4xPBxxxHH4x4x4x", result)
if status != 0x2: # status: CHECK_CONDITION
raise error.TestError('SG_IO status: %d' % status)
if host_status != 0:
raise error.TestError('SG_IO host status: %d' % host_status)
if driver_status != 0x8: # driver status: SENSE
raise error.TestError('SG_IO driver status: %d' % driver_status)
if scsi_sense[0] != 0x72: # resp. code: current error, descriptor format
raise error.TestError('SENSE response code: %d' % scsi_sense[0])
if scsi_sense[1] != 0: # sense key: No Sense
raise error.TestError('SENSE key: %d' % scsi_sense[1])
if scsi_sense[7] < 14: # additional length (ATA status is 14 - 1 bytes)
raise error.TestError('ADD. SENSE too short: %d' % scsi_sense[7])
if scsi_sense[8] != 0x9: # additional descriptor type: ATA Return Status
raise error.TestError('SENSE descriptor type: %d' % scsi_sense[8])
if scsi_sense[11] != 0: # errors: none
raise error.TestError('ATA error code: %d' % scsi_sense[11])
if scsi_sense[13] == 0x00:
return 'standby'
if scsi_sense[13] == 0x80:
return 'idle'
if scsi_sense[13] == 0xff:
return 'active'
return 'unknown(%d)' % scsi_sense[13]
def run(self):
"""The Thread's run method."""
self._time = time.time()
self._running = True
state = self._get_disk_state()
new_time = time.time()
if state in self._stats:
self._stats[state] += new_time - self._time
self._stats[state] = new_time - self._time
self._time = new_time
except error.TestError, e:
self._error = e
self._running = False
def result(self):
"""Stop the logger and return dict with result percentages."""
if (self._running):
self._running = False
self.join(self._seconds_period * 2)
return AbstractStats.to_percent(self._stats)
def get_error(self):
"""Returns the _error exception... please only call after result()."""
return self._error
def parse_pmc_s0ix_residency_info():
Parses S0ix residency for PMC based Intel systems
(skylake/kabylake/apollolake), the debugfs paths might be
different from platform to platform, yet the format is
unified in microseconds.
@returns residency in seconds.
@raises error.TestNAError if the debugfs file not found.
info_path = None
for node in ['/sys/kernel/debug/pmc_core/slp_s0_residency_usec',
if os.path.exists(node):
info_path = node
if not info_path:
raise error.TestNAError('S0ix residency file not found')
return float(utils.read_one_line(info_path)) * 1e-6
class S0ixResidencyStats(object):
Measures the S0ix residency of a given board over time.
def __init__(self):
self._initial_residency = parse_pmc_s0ix_residency_info()
def get_accumulated_residency_secs(self):
@returns S0ix Residency since the class has been initialized.
return parse_pmc_s0ix_residency_info() - self._initial_residency
class DMCFirmwareStats(object):
Collect DMC firmware stats of Intel based system (SKL+), (APL+).
# Intel CPUs only transition to DC6 from DC5.
DC6_ENTRY_KEY = 'DC5 -> DC6 count'
def __init__(self):
self._initial_stat = DMCFirmwareStats._parse_dmc_info()
def check_fw_loaded(self):
"""Check that DMC firmware is loaded
@returns boolean of DMC firmware loaded.
return self._initial_stat['fw loaded']
def is_dc6_supported(self):
"""Check that DMC support DC6 state."""
return self.DC6_ENTRY_KEY in self._initial_stat
def get_accumulated_dc6_entry(self):
"""Check number of DC6 state entry since the class has been initialized.
@returns number of DC6 state entry.
if not self.is_dc6_supported():
return 0
key = self.DC6_ENTRY_KEY
current_stat = DMCFirmwareStats._parse_dmc_info()
return current_stat[key] - self._initial_stat[key]
def _parse_dmc_info():
Parses DMC firmware info for Intel based systems.
@returns dictionary of dmc_fw info
@raises error.TestFail if the debugfs file not found.
path = '/sys/kernel/debug/dri/0/i915_dmc_info'
if not os.path.exists(path):
raise error.TestFail('DMC info file not found.')
with open(path, 'r') as f:
lines = [line.strip() for line in f.readlines()]
# For pre 4.16 kernel.
if lines[0] == 'not supported':
raise error.TestFail('DMC not supported.')
ret = dict()
for line in lines:
key, val = line.rsplit(': ', 1)
if key == 'fw loaded':
val = val == 'yes'
elif re.match(r'DC\d -> DC\d count', key):
val = int(val)
ret[key] = val
return ret
class RC6ResidencyStats(object):
Collect RC6 residency stats of Intel based system.
def __init__(self):
self._rc6_enable_checked = False
self._initial_stat = self._parse_rc6_residency_info()
def get_accumulated_residency_secs(self):
"""Check number of RC6 state entry since the class has been initialized.
@returns int of RC6 residency in seconds since instantiation.
current_stat = self._parse_rc6_residency_info()
return (current_stat - self._initial_stat) * 1e-3
def _is_rc6_enable(self):
Verified that RC6 is enable.
@returns Boolean of RC6 enable status.
@raises error.TestFail if the sysfs file not found.
path = '/sys/class/drm/card0/power/rc6_enable'
if not os.path.exists(path):
raise error.TestFail('RC6 enable file not found.')
return int(utils.read_one_line(path)) == 1
def _parse_rc6_residency_info(self):
Parses RC6 residency info for Intel based systems.
@returns int of RC6 residency in millisec since boot.
@raises error.TestFail if the sysfs file not found or RC6 not enabled.
if not self._rc6_enable_checked:
if not self._is_rc6_enable():
raise error.TestFail('RC6 is not enabled.')
self._rc6_enable_checked = True
path = '/sys/class/drm/card0/power/rc6_residency_ms'
if not os.path.exists(path):
raise error.TestFail('RC6 residency file not found.')
return int(utils.read_one_line(path))
class PCHPowergatingStats(object):
Collect PCH powergating status of intel based system.
PMC_CORE_PATH = '/sys/kernel/debug/pmc_core/pch_ip_power_gating_status'
TELEMETRY_PATH = '/sys/kernel/debug/telemetry/soc_states'
def __init__(self):
self._stat = {}
def check_s0ix_requirement(self):
Check PCH powergating status with S0ix requirement.
@returns list of PCH IP block name that need to be powergated for low
power consumption S0ix, empty list if none.
# PCH IP block that is on for S0ix. Ignore these IP block.
'PMC', 'OPI-DMI', 'SPI / eSPI', 'XHCI', 'xHCI', 'FUSE', 'PCIE0',
# PCH IP block that is on/off for S0ix depend on features enabled.
# Add log when these IPs state are on.
# CNV device has 0x31dc as devid .
if len(utils.system_output('lspci -d :31dc')) > 0:
on_ip = set(ip['name'] for ip in self._stat if ip['state'])
if on_ip:
on_ip_in_warn_list = on_ip & S0IX_WARNLIST
if on_ip_in_warn_list:
logging.warn('Found PCH IP that may be able to powergate: %s',
', '.join(on_ip_in_warn_list))
on_ip -= S0IX_WARNLIST
if on_ip:
logging.error('Found PCH IP that need to powergate: %s',
', '.join(on_ip))
return False
return True
def read_pch_powergating_info(self, sleep_seconds=1):
Read PCH powergating status info for Intel based systems.
Intel currently shows powergating status in 2 different place in debugfs
depend on which CPU platform.
@param sleep_seconds: sleep time to make DUT idle before read the data.
@raises error.TestFail if the debugfs file not found or parsing error.
if os.path.exists(self.PMC_CORE_PATH):'Use PCH powergating info at %s', self.PMC_CORE_PATH)
if os.path.exists(self.TELEMETRY_PATH):'Use PCH powergating info at %s', self.TELEMETRY_PATH)
raise error.TestFail('PCH powergating info file not found.')
def _read_pcm_core_powergating_info(self):
read_pch_powergating_info() for Intel Core KBL+
@raises error.TestFail if parsing error.
with open(self.PMC_CORE_PATH, 'r') as f:
lines = [line.strip() for line in f.readlines()]
# Example pattern to match:
# PCH IP: 0 - PMC State: On
# PCH IP: 1 - SATA State: Off
pattern = r'PCH IP:\s+(?P<id>\d+)\s+' \
r'- (?P<name>.*\w)\s+' \
r'State: (?P<state>Off|On)'
matcher = re.compile(pattern)
ret = []
for i, line in enumerate(lines):
match = matcher.match(line)
if not match:
raise error.TestFail('Can not parse PCH powergating info: ',
index = int('id'))
if i != index:
raise error.TestFail('Wrong index for PCH powergating info: ',
name ='name')
state ='state') == 'On'
ret.append({'name': name, 'state': state})
self._stat = ret
def _read_telemetry_powergating_info(self):
read_pch_powergating_info() for Intel Atom APL+
@raises error.TestFail if parsing error.
with open(self.TELEMETRY_PATH, 'r') as f:
raw_str =
# Example pattern to match:
# --------------------------------------
# South Complex PowerGate Status
# --------------------------------------
# Device PG
# LPSS 1
# SPI 1
# FUSE 0
# ---------------------------------------
trimed_pattern = r'.*South Complex PowerGate Status\n' \
r'-+\n' \
r'Device\s+PG\n' \
r'(?P<trimmed_section>(\w+\s+[0|1]\n)+)' \
trimed_match = re.match(trimed_pattern, raw_str, re.DOTALL)
if not trimed_match:
raise error.TestFail('Can not parse PCH powergating info: ',
trimmed_str ='trimmed_section').strip()
lines = [line.strip() for line in trimmed_str.split('\n')]
matcher = re.compile(r'(?P<name>\w+)\s+(?P<state>[0|1])')
ret = []
for line in lines:
match = matcher.match(line)
if not match:
raise error.TestFail('Can not parse PCH powergating info: %s',
name ='name')
state ='state') == '0' # 0 means on and 1 means off
ret.append({'name': name, 'state': state})
self._stat = ret