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Working cpu_governor setting using cpupower

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This commit is contained in:
Jan Kaluza 2012-04-19 10:38:46 +02:00
parent 1b781271d6
commit 32170dbece
1 changed files with 43 additions and 0 deletions
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43
tuned/plugins/plugin_cpu.py
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@ -1,6 +1,7 @@
import tuned.plugins import tuned.plugins
import tuned.logs import tuned.logs
import tuned.monitors import tuned.monitors
import tuned.utils.commands
import os import os
import struct import struct
@ -18,6 +19,10 @@ class CPULatencyPlugin(tuned.plugins.Plugin):
self._latency = None self._latency = None
self._cpu_latency_fd = os.open("/dev/cpu_dma_latency", os.O_WRONLY) self._cpu_latency_fd = os.open("/dev/cpu_dma_latency", os.O_WRONLY)
self._load_monitor = tuned.monitors.get_repository().create("load", devices) self._load_monitor = tuned.monitors.get_repository().create("load", devices)
self._commands_run = False
if not tuned.utils.storage.Storage.get_instance().data.has_key("cpu"):
tuned.utils.storage.Storage.get_instance().data["cpu"] = {}
@classmethod @classmethod
def _get_default_options(cls): def _get_default_options(cls):
@ -25,14 +30,20 @@ class CPULatencyPlugin(tuned.plugins.Plugin):
"load_threshold" : 0.2, "load_threshold" : 0.2,
"latency_low" : 100, "latency_low" : 100,
"latency_high" : 1000, "latency_high" : 1000,
"cpu_governor" : "",
} }
def cleanup(self): def cleanup(self):
self._revert_cpu_governor()
tuned.monitors.get_repository().delete(self._load_monitor) tuned.monitors.get_repository().delete(self._load_monitor)
os.close(self._cpu_latency_fd) os.close(self._cpu_latency_fd)
def update_tuning(self): def update_tuning(self):
if not self._commands_run:
self._apply_cpu_governor()
self._commands_run = True
load = self._load_monitor.get_load()["system"] load = self._load_monitor.get_load()["system"]
if load < self._options["load_threshold"]: if load < self._options["load_threshold"]:
self._set_latency(self._options["latency_high"]) self._set_latency(self._options["latency_high"])
@ -46,3 +57,35 @@ class CPULatencyPlugin(tuned.plugins.Plugin):
latency_bin = struct.pack("i", latency) latency_bin = struct.pack("i", latency)
os.write(self._cpu_latency_fd, latency_bin) os.write(self._cpu_latency_fd, latency_bin)
self._latency = latency self._latency = latency
# COMMANDS:
def _apply_cpu_governor(self):
self._revert_cpu_governor()
if len(self._options["cpu_governor"]) == 0:
return False
storage = tuned.utils.storage.Storage.get_instance()
old_value = tuned.utils.commands.execute(["cpupower", "frequency-info", "-p"])
if old_value.startswith("analyzing CPU"):
try:
old_value = old_value.split('\n')[1].split(' ')[2]
storage.data["cpu"]["cpu_governor"] = old_value
storage.save()
except IndexError:
pass
tuned.utils.commands.execute(["cpupower", "frequency-set", "-g", self._options["cpu_governor"]])
return True
def _revert_cpu_governor(self):
storage = tuned.utils.storage.Storage.get_instance()
if storage.data["cpu"].has_key("cpu_governor"):
tuned.utils.commands.execute(["cpupower", "frequency-set", "-g", storage.data["cpu"]["cpu_governor"]])
del storage.data["cpu"]["cpu_governor"]