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# Copyright (C) 2008, 2009 Red Hat, Inc.
# Authors: Phil Knirsch
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
import os
class DiskMonitor:
def __init__(self):
self.devices = {}
dnames = os.listdir("/sys/block/")
for d in dnames:
try:
v = open("/sys/block/"+d+"/device/vendor").read().strip()
except:
v = None
if v != "ATA" and v != "SCSI":
continue
self.devices[d] = {}
self.devices[d]["new"] = ['0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0']
self.devices[d]["max"] = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
self.__updateStat__(d)
self.devices[d]["max"] = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
#print self.devices
def __calcdiff__(self, dev):
l = []
for i in xrange(len(self.devices[dev]["old"])):
l.append(int(self.devices[dev]["new"][i]) - int(self.devices[dev]["old"][i]))
return l
def __updateStat__(self, dev):
l = open("/sys/block/"+dev+"/stat", "r").read()
self.devices[dev]["old"] = self.devices[dev]["new"]
self.devices[dev]["new"] = l.split()
l = self.__calcdiff__(dev)
for i in xrange(len(l)):
if l[i] > self.devices[dev]["max"][i]:
self.devices[dev]["max"][i] = l[i]
def __update__(self):
for dev in self.devices.keys():
self.__updateStat__(dev)
self.devices[dev]["diff"] = self.__calcdiff__(dev)
def getLoad(self):
self.__update__()
ret = {}
ret["DISK"] = {}
for dev in self.devices.keys():
ret["DISK"][dev] = {}
ret["DISK"][dev]["READ"] = float(self.devices[dev]["diff"][1]) / float(self.devices[dev]["max"][1])
ret["DISK"][dev]["WRITE"] = float(self.devices[dev]["diff"][5]) / float(self.devices[dev]["max"][5])
return ret
_plugin = DiskMonitor()
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