Chapter 4 - DSpace at Waseda University
Chapter 4 - DSpace at Waseda University
Chapter 4 - DSpace at Waseda University
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<strong>Chapter</strong> 3<br />
� LKST log tool: It is the tool for analyzing log d<strong>at</strong>a th<strong>at</strong> have function to suggest<br />
solution for problems.<br />
Kernel function trace (KFT) [2] [49] is a kernel function tracing system. The KFT system<br />
provides for capturing these callouts th<strong>at</strong> was add instrument<strong>at</strong>ion to every function entry and<br />
exit and gener<strong>at</strong>ing a trace of events, with timing details. KFT is excellent <strong>at</strong> providing a<br />
good timing overview of kernel procedures. The trace d<strong>at</strong>a contains some general inform<strong>at</strong>ion<br />
regarding PID, start time and end time, the times are in time stamp counter (TSC) ticks.<br />
System Director Mevalet [8], which is developed by NEC JAPAN, helps to analyze system<br />
performance analysis. It detects problems early and prevents them in advance. Mevalet is<br />
able to express system’s behavior by CPU, DISK and Network. In addition, Mevalet can<br />
analyze the bottle neck problem and the performance tuning problem in an embedded system.<br />
It is not needed to modify applic<strong>at</strong>ion because of Mevalet p<strong>at</strong>ched in OS level, and there are a<br />
lot of choices to select languages and middlewares.<br />
Figure 3.4 Mevalet viewer’s execution
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