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# -*- coding: utf-8 -*- |
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__author__ = 'Kenny Freeman' |
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__email__ = '[email protected]' |
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__license__ = "ISCL" |
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__docformat__ = 'reStructuredText' |
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import time |
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from collections import deque |
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import plumd |
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import plumd.plugins |
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from plumd.calc import Differential |
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from plumd.util import get_file_map |
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## todo: switch from list with pop(0) to deque |
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class Stat(plumd.plugins.Reader): |
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"""Class to read metrics from /proc/stat""" |
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defaults = { |
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'cpu_metrics': ["user", "nice", "system", "idle", "iowait", "irq", |
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"softirq","steal", "guest", "guest_nice"], |
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'per_cpu': False, |
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} |
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def __init__(self, log, config): |
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"""Plugin to measure various kernel metrics from /proc/stat |
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:param log: A logger |
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:type log: logging.RootLogger |
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:param config: a plumd.config.Conf configuration helper instance. |
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:type config: plumd.config.Conf |
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""" |
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super(Stat, self).__init__(log, config) |
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config.defaults(Stat.defaults) |
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self.calc = Differential() |
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self.proc_file = "{0}/stat".format(config.get('proc_path')) |
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self.per_cpu = config.get('per_cpu') |
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self.cpu_metrics = config.get('cpu_metrics') |
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def poll(self): |
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"""Return cpu utilization and process metrics from proc file stat. |
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:rtype: plumd.ResultSet |
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""" |
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return plumd.ResultSet(self.check()) |
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def check(self): |
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"""Return cpu utilization and process metrics from proc file stat. |
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:rtype: collections.deque |
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""" |
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per_cpu = self.per_cpu |
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results = deque() |
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result = plumd.Result("stat") |
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dat = get_file_map(self.proc_file, 0, 0) |
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ts = time.time() |
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# parse |
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for key, val in dat.items(): |
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# cpu and btime are the only special metrics |
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if key == "btime": |
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result.add(plumd.Int(key, val[0])) |
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elif key == "cpu": |
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results.append(self.proc_stat_cpu_percent(key, val, ts)) |
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elif per_cpu and key.startswith("cpu"): |
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results.append(self.proc_stat_cpu_percent(key, val, ts)) |
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else: |
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# val will be a list, take the first item from it |
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mval = self.calc.per_second(key, float(val[0]), ts) |
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result.add(plumd.Int(key, mval)) |
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results.append(result) |
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return results |
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View Code Duplication |
def proc_stat_cpu_percent(self, key, val, ts): |
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"""Return cpu utilization metrics in percentage. |
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:param key: The metric name (eg. cpu, cpu0, cpu1, etc) |
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:type key: str |
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:param val: A deque populated with the metric values from stat |
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:type val: deque |
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:rtype: list |
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""" |
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result = plumd.Result("cpu") |
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total = sum([ float(i) for i in val]) |
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cpu = self.config.get('cpu_metrics') |
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for map_val in cpu: |
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if len(val) < 1: |
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break |
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metric_val = float(val.popleft()) |
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mstr = "{0}_{1}".format(key, map_val) |
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percent_val = metric_val / total * 100.00 |
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result.add(plumd.Float(mstr, percent_val)) |
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return result |
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View Code Duplication |
def proc_stat_cpu(self, key, val, ts): |
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"""Return cpu utilization metrics in USER_HZ or Jiffies |
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(most likely units of 100Hz intervals ie. 100ms intervals). |
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:param key: The metric name (eg. cpu, cpu0, cpu1, etc) |
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:type key: str |
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:param val: A deque populated with the metric values from stat |
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:type val: deque |
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:rtype: list |
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""" |
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result = plumd.Result("cpus") |
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total = sum([ float(i) for i in val]) |
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cpu = self.config.get('cpu_metrics') |
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for map_val in cpu: |
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if len(val) < 1: |
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break |
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metric_val = float(val.popleft()) |
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mstr = "{0}_{1}".format(key, map_val) |
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percent_val = float(metric_val / total) * 100.00 |
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mval = self.calc.per_second(key, percent_val, ts) |
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result.add(plumd.Float(mstr, mval)) |
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return result |
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s4z /
plumd
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