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cpustates: workaround for disabled cpuidle

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Add "no_idle" parameter to work around the problem where cores are
reported to be in "unknown" state if there are no cpuidle transitions in
the trace. If this parameter is set, cpustates will assume cores are
active without waiting for an idle transition.
This commit is contained in:
Sergei Trofimov
2017-06-21 14:47:44 +01:00
parent 919a44baec
commit 486494f1f2
2 changed files with 31 additions and 6 deletions
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15
wlauto/result_processors/cpustate.py
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@@ -122,6 +122,20 @@ class CpuStatesProcessor(ResultProcessor):
:`error`: An error will be raised if the start marker is not found in the trace.
:`try`: If the start marker is not found, all events in the trace will be used.
""")
Parameter('no_idle', kind=bool, default=False,
description="""
Indicate that there will be no idle transitions in the trace. By default, a core
will be reported as being in an "unknown" state until the first idle transtion for
that core. Normally, this is not an issue, as cores are "nudged" as part of the setup
to ensure that there is an idle transtion before the meassured region. However, if all
idle states for the core have been disabled, or if the kernel does not have cpuidle,
the nudge will not result in an idle transition, which would cause the cores to be
reported to be in "unknown" state for the entire execution.
If this parameter is set to ``True``, the processor will assuming that cores are
running prior to the begining of the issue, and they will leave unknown state on
the first frequency transition.
"""),
]
def validate(self):
@@ -215,6 +229,7 @@ class CpuStatesProcessor(ResultProcessor):
cpu_utilisation=cpu_utilisation,
max_freq_list=self.max_freq_list,
start_marker_handling=self.start_marker_handling,
no_idle=self.no_idle,
)
parallel_report = reports.pop(0)
powerstate_report = reports.pop(0)