In message <[EMAIL PROTECTED]> you wrote:
> I'll of course have to make my own tests, but I am curious - do folks
> expect that Xenomai/SOLO will be able to equal the interrupt performance
> of Xenomai/IPIPE? I guess my intuition says that the IPIPE approach
> would guarantee better interrupt response, but maybe my intuition is
> completely wrong. I'll try to post some results in a few weeks...
Well, interrupt performance is just one thing. The whole real-time
behaviour depends on the underlying OS. And frankly, what we've seen
so far means that PREEMPT_RT can deliver "probabilistic" real-time at
best. Take a test case that has been running fine and just put it
into a new environment (like attach it to a different network), and
it will behave differently. Just plug in a new USB device that hasn't
been tested before, and nobody can tell what will happen.
If it comes to hard, reliable real-time behaviour, we recommend
Xenomai/ipipe to all our customers. However, there are some who think
it is important to have an "original, unpatched" kernel.org source
tree. These obviously run for PREEMPT_RT, and SOLO.
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: [EMAIL PROTECTED]
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