From 3e088cfbbf5fefa728e8c333838eaadbaf93a64c Mon Sep 17 00:00:00 2001
From: guest <guest@da047780-0f9f-48de-953f-cd541ee48bbd>
Date: Thu, 11 Oct 2007 17:04:39 +0000
Subject: 1 sentence conclusion

git-svn-id: svn+ssh://mecka.net/home/svn/rtcorba-paper@10 da047780-0f9f-48de-953f-cd541ee48bbd
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 paper.tex | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'paper.tex')

diff --git a/paper.tex b/paper.tex
index 08fa6f6..3438b54 100755
--- a/paper.tex
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@@ -185,11 +185,11 @@ An TAO ORB can only schedule its CORBA requests correctly, if the underlying ope
 
 The operating system should support priorization of device i/o data. The real-time application must not beeing interrupted by incomming traffic on any device, excepted data the real-time application must react on (e.g. digital inputs). On a RT\_PREEMPT enabled linux, the most part of all ISR\footnote{interrupt service routine}s are done in kernel threads, which can be priorized from userspace. This solution has two little cons: IRQ sharing and the softirqs for networking. IRQ sharing prevents from a real per device priorization. The softirqs for networking handle the traffic of all NICs in the system. So the priorization of network data from a specific device is not possible. But in case real-time networking gets more and more important, the community works on a solution for this issue.
 
-real-time capable network drivers
-
+Not all NICs (especially their firmware and driver) are good for real-time networking. Many modern NICs don't request an interrupt for each received package. They only request an interrupt if a defined amount of data is received, or a defined timeout is over. Esspecially for real-time network communications with little data transfer, these cards causes high latencies.
 
 \section{Conclusion}
 
+Using an object-orientated middleware for real-time communication over standard ethernet hardware, is especially in the automation industrie, not a trivial thing. But with ACE/TAO and RT\_PREEMPT enabled Linux it is no longer science-fiction.
 
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