70 lines
2.7 KiB
Python
70 lines
2.7 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, copy
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class DiskTuning:
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def __init__(self):
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self.devidle = {}
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self.enabled = True
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self.power = ["255", "225", "195", "165", "145", "125", "105", "85", "70", "55", "30", "20"]
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self.spindown = ["0", "250", "230", "210", "190", "170", "150", "130", "110", "90", "70", "60"]
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self.levels = len(self.power)
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def __updateIdle__(self, dev, devload):
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idle = self.devidle.setdefault(dev, {})
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idle.setdefault("LEVEL", 0)
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for type in ("READ", "WRITE"):
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if devload[type] == 0.0:
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idle.setdefault(type, 0)
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idle[type] += 1
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else:
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idle.setdefault(type, 0)
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idle[type] = 0
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def init(self, config):
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self.config = config
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if self.config.has_option("DiskTuning", "enabled"):
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self.enabled = (self.config.get("DiskTuning", "enabled") == "True")
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def cleanup(self):
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for dev in self.devidle.keys():
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if self.enabled and self.devidle[dev]["LEVEL"] > 0:
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os.system("hdparm -S0 -B255 /dev/"+dev+" > /dev/null 2>&1")
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def setTuning(self, load):
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if not self.enabled:
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return
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disks = load.setdefault("DISK", {})
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for dev in disks.keys():
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devload = disks[dev]
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self.__updateIdle__(dev, devload)
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if self.devidle[dev]["LEVEL"] < self.levels-1 and self.devidle[dev]["READ"] >= 6 and self.devidle[dev]["WRITE"] >= 6:
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self.devidle[dev].setdefault("LEVEL", 0)
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self.devidle[dev]["LEVEL"] += 1
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level = self.devidle[dev]["LEVEL"]
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os.system("hdparm -S"+self.power[level]+" -B"+self.spindown[level]+" /dev/"+dev+" > /dev/null 2>&1")
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if self.devidle[dev]["LEVEL"] > 0 and (self.devidle[dev]["READ"] == 0 or self.devidle[dev]["WRITE"] == 0):
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self.devidle[dev].setdefault("LEVEL", 0)
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self.devidle[dev]["LEVEL"] -= 2
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if self.devidle[dev]["LEVEL"] < 0:
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self.devidle[dev]["LEVEL"] = 0
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level = self.devidle[dev]["LEVEL"]
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os.system("hdparm -S"+self.power[level]+" -B"+self.spindown[level]+" /dev/"+dev+" > /dev/null 2>&1")
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_plugin = DiskTuning()
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