Automatic reconfiguration in Autonet
SOSP '91 Proceedings of the thirteenth ACM symposium on Operating systems principles
A Primary-Backup Channel Approach to Dependable Real-Time Communication in Multihop Networks
IEEE Transactions on Computers
Real-Time Communication in Multihop Networks
IEEE Transactions on Parallel and Distributed Systems
IPPS '99/SPDP '99 Proceedings of the 13th International Symposium on Parallel Processing and the 10th Symposium on Parallel and Distributed Processing
A New Approach to Provide Real-Time Services on High-Speed Local Area Networks
IPDPS '01 Proceedings of the 15th International Parallel & Distributed Processing Symposium
Dynamically Scaling Computer Networks
IPDPS '01 Proceedings of the 15th International Parallel & Distributed Processing Symposium
Extending Dynamic Reconfiguration to NOWs with Adaptive Routing
CANPC '00 Proceedings of the 4th International Workshop on Network-Based Parallel Computing: Communication, Architecture, and Applications
The Double Scheme: Deadlock-free Dynamic Reconfiguration of Cut-Through Networks
ICPP '00 Proceedings of the Proceedings of the 2000 International Conference on Parallel Processing
Fast Dynamic Reconfiguration in Irregular Networks
ICPP '00 Proceedings of the Proceedings of the 2000 International Conference on Parallel Processing
Improving the Efficiency of Adaptive Routing in Networks with Irregular Topology
HIPC '97 Proceedings of the Fourth International Conference on High-Performance Computing
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Topology changes, such as switches being turned on/off, hot expansion, hot replacement or link re-mapping, are very likely to occur in NOWs and clusters. Moreover, topology changes are much more frequent than faults. However, their impact on real-time communications has not been considered a major problem up to now, mostly because they are not feasible in traditional environments, such as massive parallel processors (MPPs), which have fixed topologies. Topology changes are supported and handled by some current and future interconnects, such as Myrinet or Infiniband. Unfortunately, they do not include support for real-time communications in the presence of topology changes.In this paper, we evaluate a previously proposed protocol, called Dynamically Re-established Real-Time Channels (DRRTC) protocol, that provides topology change- and fault-tolerant real-time communication services on NOWs. We present and analyze the performance evaluation results when a single switch or a single link is deactivated/activated for different topologies and workloads. The simulation results suggest that topology change tolerance is only limited by the resources available to establish real-time channels as well as by the topology connectivity.