Chapter 4 - DSpace at Waseda University

Chapter 4
due to its large amount. Moreover, as information displayed in a viewer, event information is
normally outputted in nanosecond, making it difficult to find the problem and the cause of
problems. Figure 4.1 shows the normally used an event analysis method. An administrator or
a developer analyzes by choosing between two analysis methods, text or viewer.
Figure 4.1: Normal method of event logging and analysis
If the problem and the cause of problem were quickly and efficiently analyzed by using
event information occurred from the kernel, the development time of the embedded system
will decrease and the reliability and stability will increase.
Figure 4.2 shows the architecture of Kernel Analysis System (KAS). 10-20 years ago, the
embedded system was developed mainly about simple work and a number of processes
cannot be running in one system. However, recently it is essential to process many programs
(mail, internet, music player, movie player, game, etc.) to be processed in one embedded
system. Increasing of complexity will increase the possibility of the problem occurrence in
the kernel. As increased system complexity is become harder and harder to solve it. Therefore,
to analyze problems that occur in the kernel, a solution can be found by analyzing event
information.
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