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module/cpufreq: fix domain cpus.

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- Use related_cpus rather than affected_cpus inside get_domain_cpus to
  return all cpus in the domain (including those online). This changes
  the behavior, but old behavior was almost certainly wrong as the
  method is memoized, and so the result should not be affected by
  hotplug.
- Add a non-memoized get_affected_cpus() which implements the old
  behavior.
This commit is contained in:
Sergei Trofimov 2017-07-26 13:59:55 +01:00
parent 9f74b9978c
commit 36aa3af66d
1 changed files with 12 additions and 1 deletions
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13
devlib/module/cpufreq.py
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@ -412,6 +412,17 @@ class CpufreqModule(Module):
"""
return self.target._execute_util('cpufreq_trace_all_frequencies', as_root=True)
def get_affected_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()]
@memoized
def get_domain_cpus(self, cpu):
"""
@ -420,7 +431,7 @@ class CpufreqModule(Module):
if isinstance(cpu, int):
cpu = 'cpu{}'.format(cpu)
sysfile = '/sys/devices/system/cpu/{}/cpufreq/affected_cpus'.format(cpu)
sysfile = '/sys/devices/system/cpu/{}/cpufreq/related_cpus'.format(cpu)
return [int(c) for c in self.target.read_value(sysfile).split()]