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Research on Efficient, Parallel Protocol Implementation

Monographs and Theses:

Articles:

Monographs and Theses

  • Methods and Semantics for Telecommunications Systems Engineering, PhD thesis


    S. Leue


    Where:


    Department of Computer Science and Applied Mathematics, University of Berne, Switzerland, December 1994.


    Note:


    Part IV of my PhD thesis contains a the algorithms and theoretical background on our efficient protocol implementation approach.

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  • Opparim - A Method and Tool for Optimized Parallel Protocol Implementation


    S. Leue, Ph. Oechslin


    Appeared in:


    Journal of High Speed Networks, Vol. 5, p. 125-143, 1996.


    Abstract:


    We are introducing and discussing a method for the {\em op}timized and {\em par}allel {\em imp}lementation of protocols as well as a tool \opparim to apply the method automatically to the specification of a protocol. We present a study case representing an IP/TCP/FTP protocol stack specified in SDL. We show how \opparim generates dependence graphs from the specification and how it manipulates these graphs to allow for an optimised and possibly parallelised implementation. We then present a hardware architecture on which the protocol stack could be implemented and show the effects of our optimizations on the processing time of an incoming packet. Using two processing elements the optimised implementation executes in less than half the time of what we call a `faithful' implementation.

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  • On Parallelising and Optimising the Implementation of Communication Protocols


    S. Leue, Ph. Oechslin


    Appeared in:


    IEEE/ACM Transactions on Networking, 4(1), p. 55-70, February 1996.


    Abstract:


    We present a method for the automatic derivation of efficient protocol implementations from a formal specification. Optimised efficient protocol implementation has become an important issue in telecommunications systems engineering as recently network throughput has increased much faster than computer processing power. Efficiency will be attained by two measures. First, the inherent parallelism in protocol specifications will be exploited. Second, the order of execution of the operations involved in the processing of the protocol data will be allowed to differ from the order prescribed in the specification, thus allowing operations to be executed jointly and more efficiently. The method will be defined formally which is useful when implementing it as a tool.

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  • Enhancing Integrated Layer Processing using Common Case Anticipation and Data Dependence Analysis


    Ph. Oechslin, S. Leue


    Extended Abstract, in:


    Proceedings of the First Internation Workshop on High Performance Protocol Architectures HIPPARCH '94, INRIA Sophia Antipolis, December 1994.


     

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  • Formalizations and Algorithms for Optimized Parallel Protocol Implementation


    S. Leue, Ph. Oechslin


    Appeared in:


    Proceedings of the IEEE International Conference on Network Protocols ICNP-94, Oct. 25-28, 1994., IEEE Computer Scociety Press, Boston, Massachusetts, October 1994.


     

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  • From SDL Specification to Optimized Parallel Protocol Implementations


    S. Leue, Ph. Oechslin


    Extended Abstract, in:


    M. Ito and G. Neufeld (eds.), Proceedings of the Fourth International IFIP Workshop on Protocols for High Speed Networks, Aug. 10-12, 1994, Chapman & Hall, 1994., to appear. Full paper with the same title in: M. Ito and G. Neufeld (eds.), Workshop Proceedings of the Fourth International IFIP Workshop on Protocols for High Speed Networks, Aug. 10-12, 1994, pp. 308-328, 1994. 
     

    Abstract:

    We propose a formalized method that allows to automatically derive an optimized implementation from the formal specification of a protocol. Our method starts with the SDL specification of a protocol stack. We first derive a data and control flow dependence graph from each SDL process. Then, in order to perform cross-layer optimizations we combine the dependence graphs of different SDL processes. Next, we determine the common path through the multi-layer dependence graph. We then parallelize this graph wherever possible which yields a relaxed dependence graph. Based on this relaxed dependence graph we interpret different optimization concepts that have been suggested in the literature, in particular lazy messages and combination of data manipulation operations. Together with these interpretations the relaxed dependence graph can be be used as a foundation for a compile-time schedule on a sequential or parallel machine architecture. The formalization we provide allows our method to be embedded in a more comprehensive protocol engineering methodology.

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  • Optimization Techniques for Parallel Protocol Implementation


    S. Leue, Ph. Oechslin


    Appeared in:


    Proceedings of the Fourth Workshop on Future Trends of Distributed Computing Systems, IEEE Computer Society Press, September 1993.


     

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