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@startuml
skinparam backgroundColor #FEFEFE
box "Application" #Orange
participant "Application" as app
end box
box "PMU monitor" #Orange
participant "PMU monitor" as pmumon
end box
box "Tensorflow" #LightGreen
participant "TFLu" as tflu
end box
box "Ethos-U" #LightBlue
participant "Ethos-U driver" as driver
end box
box "EventRecorder" #LightBlue
participant EventRecorder as event
end box
box "Timer source"
participant "Timer source" as timer
end box
app -> event: EventRecorderInitialize()
app -> tflu: Invoke()
tflu -> driver: ethosu_invoke()
driver -> app ++: ethosu_inference_begin(inference data, driver) [weak]
app -> pmumon: ethosu_monitor.configure()
pmumon -> driver: 'Configure PMU'
pmumon -> timer: Enable timer events
return
group While the Ethos-U custom op is executing
group Recurrent: PMU-monitor log events
...
timer -> app++: Timer event
app -> pmumon: ethosu_monitor.monitorSample()
pmumon -> driver: 'Sample PMU registers'
driver --> pmumon
pmumon -> event : EventRecord2()
...
end
end
driver -> app++: ethosu_inference_end(inference data, driver) [weak]
app -> timer: 'Disable timer events'
app -> pmumon: ethosu_monitor.monitorSample()
pmumon -> driver: 'Sample PMU registers'
driver --> pmumon
pmumon -> event : EventRecord2()
app -> pmumon: ethosu_monitor.release()
pmumon -> driver: 'Disable PMU'
return
@enduml
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