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refs #13, static latency setting for CPU

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This commit is contained in:
Jan Vcelak 2012-04-24 17:35:46 +02:00
parent 916c0157f0
commit 60a791fae4
1 changed files with 21 additions and 2 deletions
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23
tuned/plugins/plugin_cpu.py
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@ -16,8 +16,16 @@ class CPULatencyPlugin(tuned.plugins.Plugin):
super(self.__class__, self).__init__(None, options)
self._latency = None
self._load_monitor = None
self._cpu_latency_fd = os.open("/dev/cpu_dma_latency", os.O_WRONLY)
self._load_monitor = tuned.monitors.get_repository().create("load", devices)
def _delayed_init(self):
if self._options["force_latency"] is None:
self._load_monitor = tuned.monitors.get_repository().create("load", self._devices)
self.update_tuning = self._update_tuning_dynamic
else:
self._set_latency(self._options["force_latency"])
self.update_tuning = self._update_tuning_forced
@classmethod
def _get_default_options(cls):
@ -25,14 +33,25 @@ class CPULatencyPlugin(tuned.plugins.Plugin):
"load_threshold" : 0.2,
"latency_low" : 100,
"latency_high" : 1000,
"force_latency" : None,
}
def cleanup(self):
tuned.monitors.get_repository().delete(self._load_monitor)
if self._load_monitor is not None:
tuned.monitors.get_repository().delete(self._load_monitor)
os.close(self._cpu_latency_fd)
def update_tuning(self):
old_update_tuning = self.update_tuning
self._delayed_init()
assert self.update_tuning != old_update_tuning
self.update_tuning()
def _update_tuning_forced(self):
pass
def _update_tuning_dynamic(self):
load = self._load_monitor.get_load()["system"]
if load < self._options["load_threshold"]:
self._set_latency(self._options["latency_high"])