1 files changed, 6 insertions, 11 deletions
diff --git a/paper.tex b/paper.tex
index 9cda653..08fa6f6 100755
--- a/paper.tex
+++ b/paper.tex
@@ -165,17 +165,6 @@ To simulate the transmission of bigger process data images, the parameter \texti
 
 \epsin{sequenzV1}{80}{fig1:f5}{RPC measurement: sequence diagramm}
 
-For testing the priorization based scheduling, the following interface was added:
-
-\begin{lstlisting}
-  interface Data{
-    void Send(in string data);
-  };
-\end{lstlisting}
-
-Each time \textit{Send} was called, the Receiver did a calculation of faculty(100). The \textit{Data} interface was hosted with lower priority, then the Put interface.
-
-
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% SUB SECTION (OPTIONAL)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -192,6 +181,12 @@ As soon as the value of the digital input of the Supplier changes, the new value
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \section{Needed operating system functionalities}
 
+An TAO ORB can only schedule its CORBA requests correctly, if the underlying operating system has an priorization based scheduler, with a defined maximum scheduling latency. The timer and scheduling latency of a linux system can be determined with cyclictest. For example, the worst case latency on a RT\_PREEMPT enabled box is $26 \mu s$. The same test, on the same box, but with RT\_PREEMPT disabled is $39.6 ms$.
+
+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
+
 
 \section{Conclusion}