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Merge pull request #2 from derkling/drk-adds

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CPUFreq: add some methods
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setrofim 2015-11-13 08:23:57 +00:00
commit b6ae0f4aa2
1 changed files with 37 additions and 0 deletions
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37
devlib/module/cpufreq.py
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@ -326,3 +326,40 @@ class CpufreqModule(Module):
self.target.write_value(sysfile, value)
except ValueError:
raise ValueError('Frequency must be an integer; got: "{}"'.format(frequency))
def set_governor_for_cpus(self, cpus, governor, **kwargs):
"""
Set the governor for the specified list of CPUs.
See https://www.kernel.org/doc/Documentation/cpu-freq/governors.txt
:param cpus: The list of CPU for which the governor is to be set.
"""
online_cpus = self.target.list_online_cpus()
for cpu in online_cpus:
self.set_governor(cpu, governor, kwargs)
def set_frequency_for_cpus(self, cpus, freq, exact=False):
"""
Set the frequency for the specified list of CPUs.
See https://www.kernel.org/doc/Documentation/cpu-freq/governors.txt
:param cpus: The list of CPU for which the frequency has to be set.
"""
online_cpus = self.target.list_online_cpus()
for cpu in online_cpus:
self.set_frequency(cpu, freq, exact)
def set_all_frequencies(self, freq, exact=False):
self.target.execute(
"for CPU in /sys/devices/system/cpu/cpu[0-9]*; do "\
"echo {} > $CPU/cpufreq/scaling_cur_freq; "\
"done"\
.format(freq), as_root=True)
def set_all_governors(self, governor):
self.target.execute(
"for CPU in /sys/devices/system/cpu/cpu[0-9]*; do "\
"echo {} > $CPU/cpufreq/scaling_governor; "\
"done"\
.format(governor), as_root=True)