Efficient, Parallel Protocol Implementation

Publications

  • Stefan Leue: Methods and Semantics for Telecommunications Systems Engineering, Doctoral Dissertation, University of Berne, 1994.
    Abstract:
    Not available.
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  • S. Leue, Ph. Oechslin: Opparim - A Method and Tool for Optimized Parallel Protocol Implementation, Volume 5, Pages 125 - 143, Journal of High Speed Networks, 1996.
    Abstract: We are introducing and discussing a method for the optimized and parallel implementation 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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  • S. Leue, Ph. Oechslin: On Parallelising and Optimising the Implementation of Communication Protocols, Pages 55 - 70, IEEE/ACM Transactions on Networking 4 (1), 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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  • S. Leue, Ph. Oechslin: Enhancing Integrated Layer Processing using Common Case Anticipation and Data Dependence Analysis, Proceedings of the First Internation Workshop on High Performance Protocol Architectures HIPPARCH '94, INRIA Sophia Antipolis, 1994.
    Abstract:
    Not available.
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  • S. Leue, Ph. Oechslin: Formalizations and Algorithms for Optimized Parallel Protocol Implementation, Proceedings of the IEEE International Conference on Network Protocols ICNP-94, IEEE Computer Scociety Press, Boston, Massachusetts, 1994.
    Abstract:
    Not available.
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    S. Leue, Ph. Oechslin: From SDL Specification to Optimized Parallel Protocol Implementations, Proceedings of the Fourth International IFIP Workshop on Protocols for High Speed Networks, Chapman & Hall, 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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  • S. Leue, Ph. Oechslin: Optimization Techniques for Parallel Protocol Implementation, Proceedings of the Fourth Workshop on Future Trends of Distributed Computing Systems, IEEE computer Society Press, 1993.
    Abstract:
    Not available.
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