git-svn-id: svn+ssh://mecka.net/home/svn/rtcorba-paper@8 da047780-0f9f-48de-953f-cd541ee48bbd

1 files changed, 7 insertions, 6 deletions

diff --git a/paper.tex b/paper.tex
index f56561c..9cda653 100755
--- a/paper.tex
+++ b/paper.tex
@@ -126,7 +126,7 @@ CORBA is a Middleware, which allows RPC\footnote{Remote Procedure Call}-based IP
 The communication interfaces are defined in IDL\footnote{Interface Definition Language}. The IDL files are compiled into, e.g. c++, java, \dots, code which does the (de)serialization of the datatypes. The interface implementations (CORBA objects) are registered at language specific ORB\footnote{Object Request Broker}s. Each CORBA process owns one ORB, which handles the function requests and returns the calculated values.

 

 \subsection{real-time CORBA}

-\epsin{rtcorbaext}{80}{fig1:f2}{Real-time CORBA}

+\epsin{rtcorbaext}{70}{fig1:f2}{Real-time CORBA}

 As shown in figure 2, a real-time capable ORB extends a standard ORB with the following features: locating objects in constant time, preallocation of resources, operating system independent priority handling, priority based scheduling.

 

 \subsection{ACE/TAO}

@@ -141,9 +141,9 @@ The ACE/TAO package is available for all important operating systems. The hole f
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

 \section{Performance Measurements}

 

-The measurements were made on embedded systems (Intel Mobile CPU 600 MHz, 512 MB RAM, Intel e100 NIC) with digital I/0 ports. A square-pulse generator is connected with the digital input on the first embedded system (sender) and channel 1 of the oscilloscope. The digital outputs of the embedded systems 2 and 3 (receivers) are connected with channel 2 and 3 of the oscilloscope.

+The measurements were made on embedded systems (Intel Mobile CPU 600 MHz, 512 MB RAM, Intel e100 NIC) with digital I/0 ports. A square-pulse generator is connected with the digital input on the first embedded system (supplier) and channel 1 of the oscilloscope. The digital outputs of the embedded systems 2 and 3 (receivers) are connected with channel 2 and 3 of the oscilloscope.

 

-\epsin{versuch1}{80}{fig1:f4}{Measurement environment}

+\epsin{versuch4}{80}{fig1:f4}{Measurement environment}

 

 \subsection{RPC}

 

@@ -153,16 +153,17 @@ Each receiver hosts an object, for writting values to its digital output:
 module benchmark{

   interface Put{

     void Port( in short portNo, 

-               in short value   );

+               in short value, 

+	       in string data  );

   };

 };

 \end{lstlisting}

 

 The \textit{Port} function is called by the \textit{sender} as soon as the state of one of its digital inputs changes. The real end to end latency is meassured with the oscilloscope.

 

-\epsin{sequenzV1}{80}{fig1:f5}{RPC measurement: sequence diagramm}

+To simulate the transmission of bigger process data images, the parameter \textit{in string data} is read in from a text file, so his length, could be changed after compile time, by editing the text file.

 

-To simulate the transmission of bigger process data images, a parameter \textit{in string data} was added to the \textit{Port} function. The string was read in from a text file, so his length, could be changed after compile time, by editing the text file.

+\epsin{sequenzV1}{80}{fig1:f5}{RPC measurement: sequence diagramm}

 

 For testing the priorization based scheduling, the following interface was added: