From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Thu, 08 Mar 2007 12:49:09 +0100
From: Steven Scholz <steven.scholz@domain.hid>
MIME-Version: 1.0
Subject: Re: [Xenomai-core] xenomai preempting interrupt handler ?
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To: rpm@xenomai.org
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Philippe,

>>>>  Thus will the duration of the
>>>> ethernet interrupt handler add the the worst case latency?
>>> Not from Linux IRQ handlers; you may want to check this using the
>>> tracer. If hw interrupts are masked there, then it's a blatant bug.
>> How could I check this using the tracer? Small hint please?
> 
> http://www.xenomai.org/index.php/I-pipe:Tracer

"Traces can be generated in many ways. One happens automatically when
CONFIG_IPIPE_TRACE_IRQSOFF is enabled."

What exactly does that mean? That one trace is generated during boot?

"Another way is to invoke the testsuite, namely latency or irqbench with the
option -f to trigger a freeze on each new maximum latency."

What exactly does "trigger a freeze" mean?

Steven