netdata/python.d/cpufreq.chart.py at master · pjz/netdata · GitHub

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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")

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

netdata/python.d/cpufreq.chart.py at master · pjz/netdata · GitHub

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