def collect_cpu_config(metadata, cpus):
nohz_full = read_first_line(sysfs_path('devices/system/cpu/nohz_full'))
if nohz_full:
nohz_full = parse_cpu_list(nohz_full)
isolated = get_isolated_cpus()
if isolated:
isolated = set(isolated)
configs = {}
for cpu in cpus:
config = get_cpu_config(cpu)
if nohz_full and cpu in nohz_full:
config.append('nohz_full')
if isolated and cpu in isolated:
config.append('isolated')
if config:
configs[cpu] = ', '.join(config)
config = format_cpu_infos(configs)
cpuidle = read_first_line('/sys/devices/system/cpu/cpuidle/current_driver')
if cpuidle:
config.append('idle:%s' % cpuidle)
if not config:
return
metadata['cpu_config'] = '; '.join(config)
def collect_cpu_config(metadata, cpus):
nohz_full = read_first_line(sysfs_path('devices/system/cpu/nohz_full'))
if nohz_full:
nohz_full = parse_cpu_list(nohz_full)
isolated = get_isolated_cpus()
if isolated:
isolated = set(isolated)
configs = {}
for cpu in cpus:
config = get_cpu_config(cpu)
if nohz_full and cpu in nohz_full:
config.append('nohz_full')
if isolated and cpu in isolated:
config.append('isolated')
if config:
configs[cpu] = ', '.join(config)
config = format_cpu_infos(configs)
cpuidle = read_first_line('/sys/devices/system/cpu/cpuidle/current_driver')
if cpuidle:
config.append('idle:%s' % cpuidle)
if not config:
return
metadata['cpu_config'] = '; '.join(config)
def collect_cpu_temperatures(metadata):
path = sysfs_path("class/hwmon")
try:
names = os.listdir(path)
except OSError:
return None
cpu_temp = []
for name in names:
hwmon = os.path.join(path, name)
get_cpu_temperature(hwmon, cpu_temp)
if not cpu_temp:
return None
metadata['cpu_temp'] = ', '.join(cpu_temp)
def collect_cpu_temperatures(metadata):
path = sysfs_path("class/hwmon")
try:
names = os.listdir(path)
except OSError:
return None
cpu_temp = []
for name in names:
hwmon = os.path.join(path, name)
get_cpu_temperature(hwmon, cpu_temp)
if not cpu_temp:
return None
metadata['cpu_temp'] = ', '.join(cpu_temp)
def show(self):
nohz_full = self.read_first_line(sysfs_path('devices/system/cpu/nohz_full'))
if not nohz_full:
return
nohz_full = parse_cpu_list(nohz_full)
if not nohz_full:
return
used = set(self.system.cpus) | set(nohz_full)
if not used:
return
self.advice("WARNING: nohz_full is enabled on CPUs %s which use the "
"intel_pstate driver, whereas intel_pstate is incompatible "
"with nohz_full"
% format_cpu_list(used))
self.advice("See https://bugzilla.redhat.com/show_bug.cgi?id=1378529")
self.tuned_for_benchmarks = False
def show(self):
nohz_full = self.read_first_line(sysfs_path('devices/system/cpu/nohz_full'))
if not nohz_full:
return
nohz_full = parse_cpu_list(nohz_full)
if not nohz_full:
return
used = set(self.system.cpus) | set(nohz_full)
if not used:
return
self.advice("WARNING: nohz_full is enabled on CPUs %s which use the "
"intel_pstate driver, whereas intel_pstate is incompatible "
"with nohz_full"
% format_cpu_list(used))
self.advice("See https://bugzilla.redhat.com/show_bug.cgi?id=1378529")
self.tuned_for_benchmarks = False
def get_isolated_cpus():
"""Get the list of isolated CPUs.
Return a sorted list of CPU identifiers, or return None if no CPU is
isolated.
"""
# The cpu/isolated sysfs was added in Linux 4.2
# (commit 59f30abe94bff50636c8cad45207a01fdcb2ee49)
path = sysfs_path('devices/system/cpu/isolated')
isolated = read_first_line(path)
if isolated:
return parse_cpu_list(isolated)
cmdline = read_first_line(proc_path('cmdline'))
if cmdline:
match = re.search(r'\bisolcpus=([^ ]+)', cmdline)
if match:
isolated = match.group(1)
return parse_cpu_list(isolated)
return None
def get_isolated_cpus():
"""Get the list of isolated CPUs.
Return a sorted list of CPU identifiers, or return None if no CPU is
isolated.
"""
# The cpu/isolated sysfs was added in Linux 4.2
# (commit 59f30abe94bff50636c8cad45207a01fdcb2ee49)
path = sysfs_path('devices/system/cpu/isolated')
isolated = read_first_line(path)
if isolated:
return parse_cpu_list(isolated)
cmdline = read_first_line(proc_path('cmdline'))
if cmdline:
match = re.search(r'\bisolcpus=([^ ]+)', cmdline)
if match:
isolated = match.group(1)
return parse_cpu_list(isolated)
return None
def get_cpu_config(cpu):
sys_cpu_path = sysfs_path("devices/system/cpu")
info = []
path = os.path.join(sys_cpu_path, "cpu%s/cpufreq/scaling_driver" % cpu)
scaling_driver = read_first_line(path)
if scaling_driver:
info.append('driver:%s' % scaling_driver)
if scaling_driver == 'intel_pstate':
path = os.path.join(sys_cpu_path, "intel_pstate/no_turbo")
no_turbo = read_first_line(path)
if no_turbo == '1':
info.append('intel_pstate:no turbo')
elif no_turbo == '0':
info.append('intel_pstate:turbo')
path = os.path.join(sys_cpu_path, "cpu%s/cpufreq/scaling_governor" % cpu)
scaling_governor = read_first_line(path)
if scaling_governor:
info.append('governor:%s' % scaling_governor)
return info
def get_cpu_config(cpu):
sys_cpu_path = sysfs_path("devices/system/cpu")
info = []
path = os.path.join(sys_cpu_path, "cpu%s/cpufreq/scaling_driver" % cpu)
scaling_driver = read_first_line(path)
if scaling_driver:
info.append('driver:%s' % scaling_driver)
if scaling_driver == 'intel_pstate':
path = os.path.join(sys_cpu_path, "intel_pstate/no_turbo")
no_turbo = read_first_line(path)
if no_turbo == '1':
info.append('intel_pstate:no turbo')
elif no_turbo == '0':
info.append('intel_pstate:turbo')
path = os.path.join(sys_cpu_path, "cpu%s/cpufreq/scaling_governor" % cpu)
scaling_governor = read_first_line(path)
if scaling_governor:
info.append('governor:%s' % scaling_governor)
return info
class PowerSupply(Operation):
path = sysfs_path('class/power_supply')
@classmethod
def available(cls):
return os.path.exists(cls.path)
def __init__(self, system):
Operation.__init__(self, 'Power supply', system)
def read_power_supply(self):
# Python implementation of the on_ac_power shell script
for name in os.listdir(self.path):
filename = os.path.join(self.path, name, 'online')
if not os.path.exists(filename):
continue
line = self.read_first_line(filename)
if line == '1':
return True
if line == '0':
return False
self.error("Failed to parse %s: %r" % (filename, line))
break
return None
def show(self):
plugged = self.read_power_supply()
if plugged is None:
return
state = 'plugged' if plugged else 'unplugged'
self.log_state('the power cable is %s' % state)
if not plugged:
self.advice('The power cable must be plugged')
def __init__(self, system):
Operation.__init__(self, 'Turbo Boost (intel_pstate)', system)
self.path = sysfs_path("devices/system/cpu/intel_pstate/no_turbo")
self.enabled = None
def __init__(self, system):
Operation.__init__(self, 'CPU scaling governor (intel_pstate)',
system)
self.path = sysfs_path("devices/system/cpu/cpu0/cpufreq/scaling_governor")
self.governor = None
def available():
# On virtual machines, there is no cpufreq directory
return os.path.exists(sysfs_path("devices/system/cpu/cpu0/cpufreq"))
def __init__(self, system):
Operation.__init__(self, 'CPU Frequency', system)
self.device_syspath = sysfs_path("devices/system/cpu")
def use_intel_pstate():
cpu = 0
path = sysfs_path("devices/system/cpu/cpu%s/cpufreq/scaling_driver" % cpu)
scaling_driver = read_first_line(path)
return (scaling_driver == 'intel_pstate')
def __init__(self, system):
Operation.__init__(self, 'CPU Frequency', system)
self.device_syspath = sysfs_path("devices/system/cpu")
def available():
# On virtual machines, there is no cpufreq directory
return os.path.exists(sysfs_path("devices/system/cpu/cpu0/cpufreq"))
def __init__(self, system):
Operation.__init__(self, 'CPU scaling governor (intel_pstate)',
system)
self.path = sysfs_path("devices/system/cpu/cpu0/cpufreq/scaling_governor")
self.governor = None
def __init__(self, system):
Operation.__init__(self, 'Turbo Boost (intel_pstate)', system)
self.path = sysfs_path("devices/system/cpu/intel_pstate/no_turbo")
self.enabled = None
def use_intel_pstate():
cpu = 0
path = sysfs_path("devices/system/cpu/cpu%s/cpufreq/scaling_driver" % cpu)
scaling_driver = read_first_line(path)
return (scaling_driver == 'intel_pstate')
