REHEAT
Real-time scheduling on heterogeneous multicore architectures
| FCOMP-01-0124-FEDER-010045 PTDC/EIA-CCO/105716/2008 3 years (Feb 2010 to Jan 2013) http://www.cister.isep.ipp.pt/activities/REHEAT | |
| Summary: | Parallel processing platforms are spreading at an unprecedented rate. Traditionally, parallel processing platforms were used to reduce the execution time of a large computational job such as predicting the weather but now they are also used in low-end systems and embedded real-time systems thanks to the availability of multicore processors. And those systems are often comprised of a large number of independent tasks. Designers are well-aware that processing units specialized for a specific function can offer a significant performance boost. For example, the rendering of a scene in computer graphics can be done much faster with a graphics processor than with a general purpose processor. Network processors, digital signal processors, SIMD arrays, etc. offer similar advantages. Consequently, heterogeneous multicores now enjoy a period of widespread use. Virtually all major semiconductor companies are offering or have declared plans to offer heterogeneous multicores; see IBM Cell or upcoming AMD Fusion and Intel Larrabee. Although the processor cores in such a heterogeneous multicore are different and each type offers its own distinct advantage for various workloads, the trend is to make the processor cores generic. They are programmable and typically they are Turing complete. For example, a graphics processor can be used (and often offers good performance) for some computations that are not computer graphics operations, such as sorting and numerical vector calculations. We can therefore expect that the computational workhorse for both desktop and embedded computer systems in the near future will be a heterogeneous multicore; just like the single-core processor was in the past and just like the multicore with several identical processor cores is today. The use of heterogeneous multicore processors in real-time systems is complicated however by the fact that the real-time scheduling theory with provably good real-time scheduling algorithms is not well-developed for such platforms. Therefore, this project aims to create provable good real-time scheduling algorithms for heterogeneous multicores. |
| Funding: | Global: 130KEUR, CISTER: 130KEUR |
| Sponsors: |     |
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| Contact Person at CISTER: | Björn Andersson |
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Journal Papers
Provably good task assignment on heterogeneous multiprocessor platforms for a restricted case but with a stronger adversary HURRAY-TR-110901
Gurulingesh Raravi, Björn Andersson, Konstantinos Bletsas23rd Euromicro Conference on Real-Time Systems (ECRTS11), ACM SIGBED Review. 6 to 8, Jul, 2011, Volume 8, Issue 3, pp 19-22. Porto, Portugal.Work-In-Progress Session
Gurulingesh Raravi, Björn Andersson, Konstantinos Bletsas23rd Euromicro Conference on Real-Time Systems (ECRTS11), ACM SIGBED Review. 6 to 8, Jul, 2011, Volume 8, Issue 3, pp 19-22. Porto, Portugal.Work-In-Progress Session
PDFPreemption-light multiprocessor scheduling of sporadic tasks with high utilisation bound HURRAY-TR-110105
Konstantinos Bletsas, Björn AnderssonReal-Time Systems, Springer US. Jul 2011, Volume 47, Issue 4, pp 319-355.
Konstantinos Bletsas, Björn AnderssonReal-Time Systems, Springer US. Jul 2011, Volume 47, Issue 4, pp 319-355.
A preliminary idea for an 8-competitive, log2 DMAX + log2 log2 (1/U) asymptotic-space, interface generation algorithm for two-level hierarchical scheduling of constrained-deadline sporadic tasks on a uniprocessor HURRAY-TR-110201
Björn AnderssonSIGBED Review, ACM. Mar 2011, Volume 8, Issue 1, pp 22-29. New York, NY, U.S.A..
Björn AnderssonSIGBED Review, ACM. Mar 2011, Volume 8, Issue 1, pp 22-29. New York, NY, U.S.A..
Conference or Workshop Papers/Talks
Provably Good Scheduling of Sporadic Tasks with Resource Sharing on a Two-type Heterogeneous Multiprocessor Platform (Corrected version) HURRAY-TR-110904
Gurulingesh Raravi, Björn Andersson, Konstantinos Bletsas15th International Conference On Principles Of Distributed Systems (OPODIS'11), Springer Berlin Heidelberg. 12 to 16, Dec, 2011, 7109, pp 528-543. Toulouse, France.
Gurulingesh Raravi, Björn Andersson, Konstantinos Bletsas15th International Conference On Principles Of Distributed Systems (OPODIS'11), Springer Berlin Heidelberg. 12 to 16, Dec, 2011, 7109, pp 528-543. Toulouse, France.
On the implementation of real-time slot-based task-splitting scheduling algorithms for multiprocessor systems HURRAY-TR-110903
Paulo Baltarejo Sousa, Konstantinos Bletsas, Eduardo Tovar, Björn Andersson13th Real-Time Linux Workshop. 20 to 22, Oct, 2011, pp 207-218. Prague, Czechia.
Paulo Baltarejo Sousa, Konstantinos Bletsas, Eduardo Tovar, Björn Andersson13th Real-Time Linux Workshop. 20 to 22, Oct, 2011, pp 207-218. Prague, Czechia.
WCET Analysis Considering Contention on Memory Bus in COTS-Based Multicores HURRAY-TR-111001
Dakshina Dasari, Vincent Nélis, Björn Andersson16th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2011). 5 to 9, Sep, 2011, Work-In-Progress Session. Toulouse, France.
Dakshina Dasari, Vincent Nélis, Björn Andersson16th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2011). 5 to 9, Sep, 2011, Work-In-Progress Session. Toulouse, France.
Practical Aspects of Slot-Based Task-Splitting Dispatching in its Schedulability Analysis HURRAY-TR-110404
Paulo Baltarejo Sousa, Konstantinos Bletsas, Björn Andersson, Eduardo Tovar17th International Conference on Embedded and Real-Time Computing Systems and Applications (RTCSA 2011), IEEE. 28 to 31, Aug, 2011, 1, pp 224-230. Toyama, Japan.
Paulo Baltarejo Sousa, Konstantinos Bletsas, Björn Andersson, Eduardo Tovar17th International Conference on Embedded and Real-Time Computing Systems and Applications (RTCSA 2011), IEEE. 28 to 31, Aug, 2011, 1, pp 224-230. Toyama, Japan.
A conjecture about provably good task assignment on heterogeneous multiprocessor platforms but with a stronger adversary HURRAY-TR-110502
Gurulingesh Raravi, Björn Andersson, Konstantinos Bletsas23rd Euromicro Conference on Real-Time Systems (ECRTS'11). 6 to 8, Jul, 2011, Work-In-Progress Session. Porto, Portugal.
Gurulingesh Raravi, Björn Andersson, Konstantinos Bletsas23rd Euromicro Conference on Real-Time Systems (ECRTS'11). 6 to 8, Jul, 2011, Work-In-Progress Session. Porto, Portugal.
Two-type Heterogeneous Multiprocessor Scheduling: Is there a Phase Transition? (Extended Abstract) HURRAY-TR-110503
Gurulingesh Raravi, Björn Andersson, Konstantinos Bletsas2nd International Real-Time Scheduling Open Problems Seminar (RTSOPS 2011). 5, Jul, 2011. Porto, Portugal.
Gurulingesh Raravi, Björn Andersson, Konstantinos Bletsas2nd International Real-Time Scheduling Open Problems Seminar (RTSOPS 2011). 5, Jul, 2011. Porto, Portugal.
Intra-Type Migrative Scheduling of Implicit-Deadline Sporadic Tasks on Two-Type Heterogeneous Multiprocessor HURRAY-TR-110402
Gurulingesh Raravi, Björn Andersson, Konstantinos Bletsas10th Workshop on Models and Algorithms for Planning and Scheduling Problems (MAPSP 2011). 19 to 23, Jun, 2011. Nymburk, Czechia.
Gurulingesh Raravi, Björn Andersson, Konstantinos Bletsas10th Workshop on Models and Algorithms for Planning and Scheduling Problems (MAPSP 2011). 19 to 23, Jun, 2011. Nymburk, Czechia.
Implementing Slot-Based Task-Splitting Multiprocessor Scheduling HURRAY-TR-110704
Paulo Baltarejo Sousa, Björn Andersson, Eduardo Tovar6th IEEE International Symposium on Industrial Embedded Systems (SIES 11), IEEE. 15 to 17, Jun, 2011, pp 256-265. Vasteras, Sweden.
Paulo Baltarejo Sousa, Björn Andersson, Eduardo Tovar6th IEEE International Symposium on Industrial Embedded Systems (SIES 11), IEEE. 15 to 17, Jun, 2011, pp 256-265. Vasteras, Sweden.