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plugin_cpu: save and restore only changed intel pstate attributes

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There is no need to save and restore intel pstate attributes which aren't
changed by tuned profile.

Resolves: rhbz#1252156

Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>
This commit is contained in:
Jaroslav Škarvada 2015-08-21 14:38:17 +02:00
parent 0609b11c72
commit d7cdf56108
1 changed files with 17 additions and 15 deletions
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32
tuned/plugins/plugin_cpu.py
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@ -124,12 +124,21 @@ class CPULatencyPlugin(base.Plugin):
if instance._load_monitor is not None:
self._monitors_repository.delete(instance._load_monitor)
def _instance_apply_static(self, instance):
if instance._first_instance and self._has_intel_pstate:
self._min_perf_pct_save = self._get_intel_pstate_attr("min_perf_pct")
self._max_perf_pct_save = self._get_intel_pstate_attr("max_perf_pct")
self._no_turbo_save = self._get_intel_pstate_attr("no_turbo")
def _get_intel_pstate_attr(self, attr):
return self._cmd.read_file("/sys/devices/system/cpu/intel_pstate/%s" % attr, None).strip()
def _set_intel_pstate_attr(self, attr, val):
if val is not None:
self._cmd.write_to_file("/sys/devices/system/cpu/intel_pstate/%s" % attr, val)
def _getset_intel_pstate_attr(self, attr, value):
if value is None:
return None
v = self._get_intel_pstate_attr(attr)
self._set_intel_pstate_attr(attr, value)
return v
def _instance_apply_static(self, instance):
super(self.__class__, self)._instance_apply_static(instance)
if not instance._first_instance:
@ -139,9 +148,9 @@ class CPULatencyPlugin(base.Plugin):
if force_latency_value is not None:
self._set_latency(force_latency_value)
if self._has_intel_pstate:
self._set_intel_pstate_attr("min_perf_pct", instance.options["min_perf_pct"])
self._set_intel_pstate_attr("max_perf_pct", instance.options["max_perf_pct"])
self._set_intel_pstate_attr("no_turbo", instance.options["no_turbo"])
self._min_perf_pct_save = self._getset_intel_pstate_attr("min_perf_pct", instance.options["min_perf_pct"])
self._max_perf_pct_save = self._getset_intel_pstate_attr("max_perf_pct", instance.options["max_perf_pct"])
self._no_turbo_save = self._getset_intel_pstate_attr("no_turbo", instance.options["no_turbo"])
def _instance_unapply_static(self, instance, profile_switch = False):
super(self.__class__, self)._instance_unapply_static(instance, profile_switch)
@ -168,13 +177,6 @@ class CPULatencyPlugin(base.Plugin):
def _instance_unapply_dynamic(self, instance, device):
pass
def _get_intel_pstate_attr(self, attr):
return self._cmd.read_file("/sys/devices/system/cpu/intel_pstate/%s" % attr, None).strip()
def _set_intel_pstate_attr(self, attr, val):
if val is not None:
self._cmd.write_to_file("/sys/devices/system/cpu/intel_pstate/%s" % attr, val)
def _set_latency(self, latency):
latency = int(latency)
if self._latency != latency: