Process Models for High Performance Telecom Systems

iii The process model is a keystone in server architectures. With process models we mean how and when operating system processes are created, managed and terminated at ap-plication level. A fine-grained number of processes provide fault isolation and concurrent service of incoming requests. However, fine-grained processes often lead to deteriorated performance at the same time as concurrency also can be attained through multithreading or asynchronous I/O. In this thesis, some selected process models are analyzed and evaluated for usage in telecom systems. Modern telecom systems have requirements on real-time performance for multimedia service and constant availability for emergency calls. It is shown that models with few and long-lived processes perform better in terms of capacity and latency, but that the difference is fairly low on the telecom server platform TSP. Processmodeller för högpresterande telekomsyste