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Real-Time Scheduling of Concurrent Transactions in Multidomain Ring Buses
Sept. 2012 (vol. 61 no. 9)
pp. 1311-1324
B. D. Bui, Comput. Sci. Dept., Univ. of Illinois at Urbana-Champaign, Urbana, IL, USA
R. Pellizzoni, Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON, Canada
M. Caccamo, Comput. Sci. Dept., Univ. of Illinois at Urbana-Champaign, Urbana, IL, USA
We address the problem of scheduling concurrent periodic real-time transactions on Multidomain Ring Bus (MDRB). The problem is challenging because although the bus allows multiple nonoverlapping transactions to be executed concurrently, the degree of concurrency depends on the topology of the bus and of executed transactions. To solve this problem, first, we propose two novel efficient scheduling algorithms for topographically acyclic transaction sets. The first algorithm is optimal for transaction sets under restrictive assumptions while the second one induces a good sufficient schedulable utilization bound for more general transaction sets. Then, we extend these two algorithms for the scheduling of topographically cyclic transaction sets. Extensive simulations show that the proposed algorithm can schedule transaction sets with high bus utilization and is better than that of related works in most practical settings. The implementation of the algorithms in a real testbed shows that they have relatively low execution-time overhead.

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Index Terms:
system buses,multiprocessing systems,network topology,network-on-chip,processor scheduling,SoC,concurrent periodic real-time transaction scheduling,multidomain ring buses,MDRB,multiple nonoverlapping transactions,bus topology,topographical acyclic transaction sets,execution-time overhead,real-time network-on-chip scheduling,NoC,many-core system-on-chip,Real time systems,Schedules,System-on-a-chip,Scheduling,Optimal scheduling,Scheduling algorithm,real-time network-on-chip scheduling.,Real-time communications,real-time scheduling
B. D. Bui, R. Pellizzoni, M. Caccamo, "Real-Time Scheduling of Concurrent Transactions in Multidomain Ring Buses," IEEE Transactions on Computers, vol. 61, no. 9, pp. 1311-1324, Sept. 2012, doi:10.1109/TC.2011.151
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