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cpufreq: Add function to get CPUs in frequency domain

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This commit is contained in:
Brendan Jackman 2016-10-10 14:05:09 +01:00
parent 25818b035e
commit f1b4bf2845
1 changed files with 11 additions and 0 deletions
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11
devlib/module/cpufreq.py
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@ -408,3 +408,14 @@ class CpufreqModule(Module):
"""
return self.target._execute_util('cpufreq_trace_all_frequencies', as_root=True)
@memoized
def get_domain_cpus(self, cpu):
"""
Get the CPUs that share a frequency domain with the given CPU
"""
if isinstance(cpu, int):
cpu = 'cpu{}'.format(cpu)
sysfile = '/sys/devices/system/cpu/{}/cpufreq/affected_cpus'.format(cpu)
return [int(c) for c in self.target.read_value(sysfile).split()]