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Merge pull request #217 from olysonek/fix-epb-support-check

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cpu: Update checking if EPB is supported
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Jaroslav Škarvada 2019-11-22 15:46:37 +01:00 committed by GitHub
commit a37e1d17fb
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1 changed files with 5 additions and 2 deletions
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7
tuned/plugins/plugin_cpu.py
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@ -93,8 +93,11 @@ class CPULatencyPlugin(base.Plugin):
def _check_energy_perf_bias(self):
self._has_energy_perf_bias = False
retcode_unsupported = 1
retcode = self._cmd.execute(["x86_energy_perf_policy", "-r"], no_errors = [errno.ENOENT, retcode_unsupported])[0]
if retcode == 0:
retcode, out = self._cmd.execute(["x86_energy_perf_policy", "-r"], no_errors = [errno.ENOENT, retcode_unsupported])
# With recent versions of the tool, a zero exit code is
# returned even if EPB is not supported. The output is empty
# in that case, however.
if retcode == 0 and out != "":
self._has_energy_perf_bias = True
elif retcode < 0:
log.warning("unable to run x86_energy_perf_policy tool, ignoring CPU energy performance bias, is the tool installed?")