64 lines
1.9 KiB
Python
64 lines
1.9 KiB
Python
# Copyright (C) 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 logging, tuned_logging
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log = logging.getLogger("tuned.cputuning")
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class CPUTuning:
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config_section = "CPUTuning"
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def __init__(self):
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self.latency = 100
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self.enabled = True
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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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try:
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open("/dev/cpu_dma_latency", "w")
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except:
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self.enabled = False
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log.info("Module is %s" % ("enabled" if self.enabled else "disabled"))
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def cleanup(self):
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log.debug("Cleanup")
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if not self.enabled:
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return
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open("/dev/cpu_dma_latency", "w").write("100\n")
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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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loadavg = load.setdefault("CPU", 0.0)
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if self.latency == 100 and loadavg < 0.2:
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log.debug("Setting latency to 999")
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self.latency = 999
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open("/dev/cpu_dma_latency", "w").write("999\n")
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if self.latency == 999 and loadavg > 0.2:
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log.debug("Setting latency to 100")
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self.latency = 100
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open("/dev/cpu_dma_latency", "w").write("100\n")
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_plugin = CPUTuning()
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