Hierarchical Scheduling Framework for Virtual Clustering of Multiprocessors

Scheduling of sporadic task systems on multiprocessor platforms is an area which has received much attention in the recent past. It is widely believed that finding an optimal scheduler is hard, and therefore most studies have focused on developing algorithms with good utilization bounds. These algorithms can be broadly classified into two categories: partitioned scheduling in which tasks are statically assigned to individual processors, and globalscheduling in which each task is allowed to execute on any processor in the platform. In this paper we consider a third, more general, approach called cluster-based scheduling. In this approach each task is statically assigned to a processor cluster, tasks in each cluster areglobally scheduled among themselves, and clusters in turn are scheduled on the multiprocessor platform. We develop techniques to support such cluster-based scheduling algorithms, and also consider properties that minimize processor utilization of individual clusters. Since neither partitioned nor global strategies dominate over the other, cluster-based scheduling is a natural direction for research towards achieving improved utilization bounds.

[1]  Richard West,et al.  Mutable Protection Domains: Towards a Component-Based System for Dependable and Predictable Computing , 2007, RTSS 2007.

[2]  Sanjoy K. Baruah,et al.  Multiprocessor fixed-priority scheduling with restricted interprocessor migrations , 2003, 15th Euromicro Conference on Real-Time Systems, 2003. Proceedings..

[3]  Theodore P. Baker,et al.  EDZL scheduling analysis , 2007, 19th Euromicro Conference on Real-Time Systems (ECRTS'07).

[4]  Sanjoy K. Baruah,et al.  The partitioned multiprocessor scheduling of deadline-constrained sporadic task systems , 2006, IEEE Transactions on Computers.

[5]  Kwei-Jay Lin,et al.  Efficient Real-Time Scheduling Algorithms for Multiprocessor Systems , 2002 .

[6]  Giuseppe Lipari,et al.  New Schedulability Tests for Real-Time Task Sets Scheduled by Deadline Monotonic on Multiprocessors , 2005, OPODIS.

[7]  Sanjoy K. Baruah,et al.  Deadline-based scheduling of periodic task systems on multiprocessors , 2002, Inf. Process. Lett..

[8]  Giuseppe Lipari,et al.  Resource partitioning among real-time applications , 2003, 15th Euromicro Conference on Real-Time Systems, 2003. Proceedings..

[9]  Björn Andersson,et al.  Multiprocessor Scheduling with Few Preemptions , 2006, 12th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications (RTCSA'06).

[10]  S. Vestal.  Preemptive Scheduling of Multi-criticality Systems with Varying Degrees of Execution Time Assurance , 2007, RTSS 2007.

[11]  Daniel F. García,et al.  Minimum and maximum utilization bounds for multiprocessor RM scheduling , 2001, Proceedings 13th Euromicro Conference on Real-Time Systems.

[12]  Dong-Ik Oh,et al.  Utilization Bounds for N-Processor Rate Monotone Scheduling with Static Processor Assignment , 1998, Real-Time Systems.

[13]  James H. Anderson,et al.  Tardiness bounds under global EDF scheduling on a multiprocessor , 2005, 26th IEEE International Real-Time Systems Symposium (RTSS'05).

[14]  Xue Liu,et al.  Integrating Adaptive Components: An Emerging Challenge in Performance-Adaptive Systems and a Server Farm Case-Study , 2007, 28th IEEE International Real-Time Systems Symposium (RTSS 2007).

[15]  Aloysius Ka-Lau Mok,et al.  Fundamental design problems of distributed systems for the hard-real-time environment , 1983 .

[16]  Michele Cirinei,et al.  Response-Time Analysis for Globally Scheduled Symmetric Multiprocessor Platforms , 2007, 28th IEEE International Real-Time Systems Symposium (RTSS 2007).

[17]  Mark Moir,et al.  Pfair scheduling of fixed and migrating periodic tasks on multiple resources , 1999, Proceedings 20th IEEE Real-Time Systems Symposium (Cat. No.99CB37054).

[18]  Jane W.-S. Liu,et al.  Scheduling real-time applications in an open environment , 1997, Proceedings Real-Time Systems Symposium.

[19]  Tei-Wei Kuo,et al.  A fixed-priority-driven open environment for real-time applications , 1999, Proceedings 20th IEEE Real-Time Systems Symposium (Cat. No.99CB37054).

[20]  James W. Layland,et al.  Scheduling Algorithms for Multiprogramming in a Hard-Real-Time Environment , 1989, JACM.

[21]  Shinpei Kato,et al.  Real-Time Scheduling with Task Splitting on Multiprocessors , 2007, 13th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications (RTCSA 2007).

[22]  Theodore P. Baker,et al.  Multiprocessor EDF and deadline monotonic schedulability analysis , 2003, RTSS 2003. 24th IEEE Real-Time Systems Symposium, 2003.

[23]  Sanjoy K. Baruah,et al.  A framework for achieving inter-application isolation in multiprogrammed, hard real-time environments , 2000, Proceedings 21st IEEE Real-Time Systems Symposium.

[24]  Alan Burns,et al.  Hierarchical fixed priority pre-emptive scheduling , 2005, 26th IEEE International Real-Time Systems Symposium (RTSS'05).

[25]  Sanjoy K. Baruah.  Techniques for Multiprocessor Global Schedulability Analysis , 2007, 28th IEEE International Real-Time Systems Symposium (RTSS 2007).

[26]  James H. Anderson,et al.  A Hybrid Real-Time Scheduling Approach for Large-Scale Multicore Platforms , 2007, 19th Euromicro Conference on Real-Time Systems (ECRTS'07).

[27]  Insup Lee,et al.  Compositional Analysis Framework Using EDP Resource Models , 2007, RTSS 2007.

[28]  Sanjoy K. Baruah,et al.  Preemptively scheduling hard-real-time sporadic tasks on one processor , 1990, [1990] Proceedings 11th Real-Time Systems Symposium.

[29]  Sanjoy K. Baruah,et al.  Optimal utilization bounds for the fixed-priority scheduling of periodic task systems on identical multiprocessors , 2004, IEEE Transactions on Computers.

[30]  Giuseppe Lipari,et al.  Improved schedulability analysis of EDF on multiprocessor platforms , 2005, 17th Euromicro Conference on Real-Time Systems (ECRTS'05).

[31]  Aloysius K. Mok,et al.  A model of hierarchical real-time virtual resources , 2002, 23rd IEEE Real-Time Systems Symposium, 2002. RTSS 2002..

[32]  James H. Anderson,et al.  Real-Time Scheduling on Multicore Platforms , 2006, 12th IEEE Real-Time and Embedded Technology and Applications Symposium (RTAS'06).

[33]  Aloysius K. Mok,et al.  Resource partition for real-time systems , 2001, Proceedings Seventh IEEE Real-Time Technology and Applications Symposium.

[34]  Insup Lee,et al.  Periodic resource model for compositional real-time guarantees , 2003, RTSS 2003. 24th IEEE Real-Time Systems Symposium, 2003.