134 lines
4.4 KiB
Python
134 lines
4.4 KiB
Python
# Copyright (C) 2008, 2009 Red Hat, Inc.
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# Authors: Phil Knirsch
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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import os
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import re
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import logging, tuned_logging
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from tuned_nettool import ethcard
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log = logging.getLogger("tuned.netmonitor")
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class NetMonitor:
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config_section = "NetMonitor"
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def __init__(self):
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self.devices = {}
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self.enabled = True
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tunable = self._tunable_devices()
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for dev in tunable:
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max_speed = self._calcspeed(ethcard(dev).get_max_speed())
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self.devices[dev] = {}
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self.devices[dev]["new"] = ['0', '0', '0', '0']
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self.devices[dev]["max"] = [max_speed, 1, max_speed, 1]
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self._updateStat(dev)
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self.devices[dev]["max"] = [max_speed, 1, max_speed, 1]
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def _tunable_devices(self):
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devices = os.listdir("/sys/class/net")
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tunable = filter(self._device_is_tunable, devices)
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return tunable
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def _device_is_tunable(self, name):
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if self._device_type(name) in "virtual":
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return False
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card = ethcard(name)
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return len(card.supported_modes) > 1 and card.get_max_speed() >= 1000
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def _device_type(self, name):
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try:
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path = os.path.join("/sys/class/net", name)
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path = os.path.join(os.path.dirname(path), os.readlink(path))
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path = os.path.normpath(path)
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devtype = re.match(r"/sys/devices/([^/]+)/", path).group(1)
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except (IOError, AttributeError, OSError):
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devtype = "unknown"
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log.warn("Cannot determine type of '%s'." % name)
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log.debug("Found network device: %s (%s)" % (name, devtype))
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return devtype
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def _calcspeed(self, speed):
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# 0.6 is just a magical constant (empirical value): Typical workload on netcard won't exceed
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# that and if it does, then the code is smart enough to adapt it.
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# 1024 * 1024 as for MB -> B
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# speed / 8 Mb -> MB
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return (int) (0.6 * 1024 * 1024 * speed / 8)
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def _calcdiff(self, dev):
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l = []
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for i in xrange(len(self.devices[dev]["old"])):
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l.append(int(self.devices[dev]["new"][i]) - int(self.devices[dev]["old"][i]))
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return l
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def _updateStat(self, dev):
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self.devices[dev]["old"] = self.devices[dev]["new"][:]
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l = open("/sys/class/net/"+dev+"/statistics/rx_bytes", "r").read().strip()
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self.devices[dev]["new"][0] = l
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l = open("/sys/class/net/"+dev+"/statistics/rx_packets", "r").read().strip()
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self.devices[dev]["new"][1] = l
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l = open("/sys/class/net/"+dev+"/statistics/tx_bytes", "r").read().strip()
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self.devices[dev]["new"][2] = l
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l = open("/sys/class/net/"+dev+"/statistics/tx_packets", "r").read().strip()
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self.devices[dev]["new"][3] = l
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l = self._calcdiff(dev)
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for i in xrange(len(l)):
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if l[i] > self.devices[dev]["max"][i]:
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self.devices[dev]["max"][i] = l[i]
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def _update(self):
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for dev in self.devices.keys():
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self._updateStat(dev)
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self.devices[dev]["diff"] = self._calcdiff(dev)
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log.debug("%s diff: %s" % (dev, self.devices[dev]["diff"]))
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def init(self, config):
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log.debug("Init")
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self.config = config
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if self.config.has_option(self.config_section, "enabled"):
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self.enabled = (self.config.get(self.config_section, "enabled") == "True")
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interval = self.config.getint("main", "interval")
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log.info("Module is %s" % ("enabled" if self.enabled else "disabled"))
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for d in self.devices.keys():
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max_data = self._calcspeed(ethcard(d).get_max_speed()) * interval;
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self.devices[d]["max"] = [max_data, 1, max_data, 1]
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log.info("Tunable ethernet cards: %s" % ", ".join(self.devices.keys()))
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def cleanup(self):
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log.debug("Cleanup")
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def getLoad(self):
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if not self.enabled:
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return
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self._update()
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ret = {}
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ret["NET"] = {}
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for dev in self.devices.keys():
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ret["NET"][dev] = {}
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ret["NET"][dev]["READ"] = float(self.devices[dev]["diff"][0]) / float(self.devices[dev]["max"][0])
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ret["NET"][dev]["WRITE"] = float(self.devices[dev]["diff"][2]) / float(self.devices[dev]["max"][2])
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return ret
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_plugin = NetMonitor()
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