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COMPUTING PLATFORMS
Case Study
 
Recurring defect problems on a non-stop Operating System are tracked and fixed.
 
 
The customer
Our customer provides nonstop computing for businesses
 
The challenge

The customer used two series of the non-stop operating system (OS) SVR 4.0 and SVR 4.2 on a fault tolerant system. Both had a recurring problem of defects and the defects reported could not be tracked and fixed.

 
The solution
The project meant that we needed to completely understand the Operating System and its usage. This included process management, thread management, file management, I/O management etc. Contributors to the success of the project were:
Our knowledge base on User Space, Kernel Space and performance improvement by reducing copies from User to Kernel and vice versa
Our experience in network programming concepts and our ideas on streams
Our know-how on the big endian and little endian architecture concepts and their bottlenecks in porting

We used defect tracking tools like PTS and kernel debugger Cscope to fix the frequent problem. Two teams working both onsite and offshore generated weekly analysis reports, narrowed down the focus and fixed the defects successfully.

 
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