Fig 8 - uploaded by Dr H Shaheen
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8: Example of Multiple Inheritance Object aggregation An aggregation model shows how classes that are collections are composed of other classes. Aggregation models are similar to the part-of relationship in semantic data models. In Figure 8.13. I have modeled a library item, which is a study pack for a university course. This study pack includes lecture notes, exercises, sample solutions, copies of transparencies used in lectures, and videotapes. The UML notation for aggregation is to represent the composition by including a diamond shape on the source of the link. Therefore, Figure 8.9 can be read as 'A study pack is composed of one of more assignments, OHP slide packages, lecture notes and videotapes
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... The 40-20-40 rule of software engineering development shown below depicts the importance of software testing. [35] According to some researchers [7], testing is a widespread validation approach in industry. However it is still largely ad hoc, expensive and unpredictably effective. ...
Several significant advances have been made in technology for take advantage of Instruction-level parallelism (ILP). At the same time, a number of processor architectures have emerged that achieve high performance. Superscalar is an example of processer architecture that takes advantage from instruction-level parallelism to derive their benefit.
The reorder buffer (ROB) plays a key role in modern superscalar processor architecture to improve processor performance by allowing instruction execution out of program order and run ahead of sequential instruction code exploiting instruction-level parallelism. The reorder buffer is a functional structure of a processor execution engine that supports speculative execution, physical register recycling and precise exception.
Conventionally, the reorder buffer is considered as a circular buffer with incoming instructions at tail pointer after the decoding stage and completing instructions at head pointer after commitment stage. The latter stage verifies instructions that have been dispatched, issued, executed and are not completely speculatively.
For improving the performance of superscalar architecture, size of reorder buffer cannot be increased to its maximum because it can severely increase the complexity and power consumption.
This dissertation work is to find optimal sized reorder buffer to achieve significant instruction-level parallelism eventually which reduces instructions per cycle (IPC). For this, experimental approach is used on PSATsim for ten benchmark programs.
... The 40-20-40 rule of software engineering development shown below depicts the importance of software testing. [35] According to some researchers [7], testing is a widespread validation approach in industry. However it is still largely ad hoc, expensive and unpredictably effective. ...
Software Testing has grown from a process to a complete industry in itself.
The book tries to summerize the testing process with specific emphasis on
static testing. Testing can be done by static and dynamic ways. One of the
static testing method is code reading. This book elaborate the code
reading method and examplify the same with a experimental data. Mr.
Ahmed in this book had elaborated a case study on evaluating the
efficiency and effectiveness of code reading technique with emphasis on
enhancing software quality. The work carried out used a GQM (Goal-
Questioned-Metric) method and populated different metrics. Based on the
data analysis of these different metrics we try to finally conclude whether
code reading is effective and efficient or not.
