mirror of
https://github.com/tahoe-lafs/tahoe-lafs.git
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104 lines
3.5 KiB
Python
104 lines
3.5 KiB
Python
"""
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Ported to Python 3.
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"""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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from __future__ import unicode_literals
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from future.utils import PY2
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if PY2:
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from future.builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min # noqa: F401
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from time import clock as process_time
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else:
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from time import process_time
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import time
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from twisted.application import service
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from twisted.application.internet import TimerService
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from zope.interface import implementer
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from foolscap.api import eventually
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from allmydata.util import log, dictutil
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from allmydata.interfaces import IStatsProducer
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@implementer(IStatsProducer)
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class CPUUsageMonitor(service.MultiService):
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HISTORY_LENGTH = 15
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POLL_INTERVAL = 60 # type: float
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def __init__(self):
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service.MultiService.__init__(self)
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# we don't use process_time() here, because the constructor is run by
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# the twistd parent process (as it loads the .tac file), whereas the
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# rest of the program will be run by the child process, after twistd
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# forks. Instead, set self.initial_cpu as soon as the reactor starts
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# up.
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self.initial_cpu = 0.0 # just in case
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eventually(self._set_initial_cpu)
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self.samples = []
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# we provide 1min, 5min, and 15min moving averages
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TimerService(self.POLL_INTERVAL, self.check).setServiceParent(self)
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def _set_initial_cpu(self):
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self.initial_cpu = process_time()
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def check(self):
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now_wall = time.time()
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now_cpu = process_time()
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self.samples.append( (now_wall, now_cpu) )
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while len(self.samples) > self.HISTORY_LENGTH+1:
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self.samples.pop(0)
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def _average_N_minutes(self, size):
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if len(self.samples) < size+1:
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return None
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first = -size-1
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elapsed_wall = self.samples[-1][0] - self.samples[first][0]
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elapsed_cpu = self.samples[-1][1] - self.samples[first][1]
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fraction = elapsed_cpu / elapsed_wall
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return fraction
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def get_stats(self):
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s = {}
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avg = self._average_N_minutes(1)
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if avg is not None:
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s["cpu_monitor.1min_avg"] = avg
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avg = self._average_N_minutes(5)
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if avg is not None:
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s["cpu_monitor.5min_avg"] = avg
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avg = self._average_N_minutes(15)
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if avg is not None:
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s["cpu_monitor.15min_avg"] = avg
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now_cpu = process_time()
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s["cpu_monitor.total"] = now_cpu - self.initial_cpu
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return s
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class StatsProvider(service.MultiService):
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def __init__(self, node):
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service.MultiService.__init__(self)
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self.node = node
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self.counters = dictutil.UnicodeKeyDict()
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self.stats_producers = []
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self.cpu_monitor = CPUUsageMonitor()
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self.cpu_monitor.setServiceParent(self)
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self.register_producer(self.cpu_monitor)
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def count(self, name, delta=1):
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val = self.counters.setdefault(name, 0)
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self.counters[name] = val + delta
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def register_producer(self, stats_producer):
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self.stats_producers.append(IStatsProducer(stats_producer))
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def get_stats(self):
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stats = {}
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for sp in self.stats_producers:
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stats.update(sp.get_stats())
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ret = { 'counters': self.counters, 'stats': stats }
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log.msg(format='get_stats() -> %(stats)s', stats=ret, level=log.NOISY)
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return ret
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