ftrace_latency.pdf
OneofthedifficulttasksanalyzingReal-Timesystemsisfindingasource/causeofanunexpectedlatency.Isthelatencycausedbytheapplicationorthekernel?Isitawakeupschedulinglatencyoralatencycausedbyinterruptsbeingdisabled,orisitalatencycausedbypreemptionbeingdisabled,
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