| Nowadays, Multi-processor parallel system has been widely used in many areas, and is one of the methods to get the high performance system. But as under the influence of many factors, such as system structure, communication bandwidth, parallel degree of software, etc, the multi-processor parallel system can not work out its capacity fully; and as the multi-processor parallel system always has a very complex structure, this may reduce the reliability of the whole system. So it is necessary to do the performance evaluation and reliability evaluation of the whole system during the design period. Aiming at this request, the dissertation focuses on the research of building a multi-DSP parallel processing system model based on the Petri net, and using such model to evaluate the performance of the multi-DSP system, as well as guide a design of the system fault tolerance.Firstly, the theory of Petri net, stochastic Petri net, and methods of analyzing the general stochastic Petri net (GSPN) is dissertated in the thesis. Secondly, the structure of the multi-DSP system, basing on ADSP14060 SHARC DSP, is discussed, especially the structure of"master-slave"and"pipeline", which are the most common using structures. Under the basis of structure analyzing, the multi-DSP parallel system model based on the general stochastic Petri net(GSPN) are built, and using the system models, the performances of"master-slave"and"pipeline"parallel structures are evaluated. The results of performance evaluation show the main factors that influence the performance of the multi-DSP parallel system, and the methods that can improve the performance of the system. Finally, the reliability of the multi-DSP parallel system is analyzed, and a fault tolerance design is showed.The results show that the Petri-net based system model can efficiently evaluate the performance of the real system, and the model can fulfill the requirement of multi-DSP system's performance evaluation. |
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