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# -*- coding: utf-8 -*-
# Description: cpufreq netdata python.d module
# Author: Pawel Krupa (paulfantom) and Steven Noonan (tycho)
import glob
import os
import time
from base import SimpleService
# default module values (can be overridden per job in `config`)
# update_every = 2
ORDER = ['cpufreq']
CHARTS = {
'cpufreq': {
'options': [None, 'CPU Clock', 'MHz', 'cpufreq', None, 'line'],
'lines': [
# lines are created dynamically in `check()` method
]}
}
class Service(SimpleService):
def __init__(self, configuration=None, name=None):
prefix = os.getenv('NETDATA_HOST_PREFIX', "")
if prefix.endswith('/'):
prefix = prefix[:-1]
self.sys_dir = prefix + "/sys/devices"
SimpleService.__init__(self, configuration=configuration, name=name)
self.order = ORDER
self.definitions = CHARTS
self._orig_name = ""
self.assignment = {}
self.accurate_exists = True
self.accurate_last = {}
def _get_data(self):
data = {}
if self.accurate_exists:
elapsed = time.time() - self.timetable['last']
accurate_ok = True
for name, paths in self.assignment.items():
last = self.accurate_last[name]
current = 0
for line in open(paths['accurate'], 'r'):
line = list(map(int, line.split()))
current += (line[0] * line[1]) / 100
delta = current - last
data[name] = delta
self.accurate_last[name] = current
if delta == 0 or abs(delta) > 1e7:
# Delta is either too large or nonexistent, fall back to
# less accurate reading. This can happen if we switch
# to/from the 'schedutil' governor, which doesn't report
# stats.
accurate_ok = False
if accurate_ok:
return data
else:
self.alert("accurate method failed, falling back")
self.accurate_exists = False
for name, paths in self.assignment.items():
data[name] = open(paths['inaccurate'], 'r').read()
return data
def check(self):
try:
self.sys_dir = str(self.configuration['sys_dir'])
except (KeyError, TypeError):
self.error("No path specified. Using: '" + self.sys_dir + "'")
self._orig_name = self.chart_name
for path in glob.glob(self.sys_dir + '/system/cpu/cpu*/cpufreq/stats/time_in_state'):
path_elem = path.split('/')
cpu = path_elem[-4]
if cpu not in self.assignment:
self.assignment[cpu] = {}
self.assignment[cpu]['accurate'] = path
self.accurate_last[cpu] = 0
if len(self.assignment) == 0:
self.accurate_exists = False
for path in glob.glob(self.sys_dir + '/system/cpu/cpu*/cpufreq/scaling_cur_freq'):
path_elem = path.split('/')
cpu = path_elem[-3]
if cpu not in self.assignment:
self.assignment[cpu] = {}
self.assignment[cpu]['inaccurate'] = path
if len(self.assignment) == 0:
self.error("couldn't find a method to read cpufreq statistics")
return False
for name in self.assignment.keys():
self.definitions[ORDER[0]]['lines'].append([name, name, 'absolute', 1, 1000])
return True
def create(self):
self.chart_name = "cpu"
status = SimpleService.create(self)
self.chart_name = self._orig_name
return status
def update(self, interval):
self.chart_name = "cpu"
status = SimpleService.update(self, interval=interval)
self.chart_name = self._orig_name
return status
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