Mohammed Riyaz <[email protected]> writes:
> Hi,
>
> I am working on trying to measure the worst case processing time for
> hard IRQ and soft IRQ. Well, I understand that we could use time
> stamps at entry and exit to measure this. Just wanted to know if there
> were other standard ways of measuring this. Any suggestions?
If your goal is to identify worst case latencies of interrupted code --
ftrace has special tracers for this: CONFIG_{IRQSOFF,PREEMPT,SCHED}_TRACER
-Andi
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