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Self-Awareness at theHardware/Software InterfaceMarco Platzner, University of Paderborn
Overview•    The hardware/software interface     – reconfigurable hardware     – computing elements design space•    The E...
Classic View on Hardware and Software                                 high-level language                                 ...
Soft Hardware               high-level language               assembly language                                           ...
Reconfigurable Hardware Devices•    Programmable logic blocks and programmable interconnect                               ...
Computing Element Design Space             flexibility                                                general-purpose     ...
Overview•    The hardware/software interface     – reconfigurable hardware     – computing elements design space•    The E...
The EPiCS Approach (www.epics-project.eu)•    EPiCS studies proprioceptive computing systems     – proprioceptive = self-a...
Proprioception at the Hw/Sw Interface•   Self-awareness: Knowledge about internal state & environment     – utilization of...
Hardware/Software Multithreading•    Multithreading     – applications are partitioned into threads     – threads synchron...
Heterogeneous Multi-Cores applications, quality of service requirements, system state                                     ...
ReconOS•    Our operating system for heterogeneous multi-cores     – leverages eCos and Linux operating systems     – uses...
Summary•    The hw/sw interface has shifted. Reconfigurable hardware     allows us to adapt the hardware at runtime.•    P...
Further Reading•   Reconfigurable hardware and computing    [1]        Katherine Compton and Scott Hauck. Reconfigurable C...
Thanks for Your                                Interest!                                                                  ...
Self-awareness at the Hardware/Software Interface - Marco Platzner
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Self-awareness at the Hardware/Software Interface - Marco Platzner

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Marco Platzner's presentation slides for the Awareness Virtual lecture Series 2011.

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Transcript of "Self-awareness at the Hardware/Software Interface - Marco Platzner"

  1. 1. Self-Awareness at theHardware/Software InterfaceMarco Platzner, University of Paderborn
  2. 2. Overview• The hardware/software interface – reconfigurable hardware – computing elements design space• The EPiCS approach – self-awareness at the hardware/software interface – hardware/software multithreading and heterogeneous multi-cores 2Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
  3. 3. Classic View on Hardware and Software high-level language assembly languagesoftware operating system instruction set architecture micro architecturehardware logic transistors geometry 3 Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
  4. 4. Soft Hardware high-level language assembly language reconfigurable hardware operating system instruction set architecture micro architecture logic transistors geometry 4Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
  5. 5. Reconfigurable Hardware Devices• Programmable logic blocks and programmable interconnect • fine-grained (bit-oriented) – Field-programmable Gate Arrays (FPGAs) – lookup tables, flip-flops LUT FF LUT LUT FF ALU REG SHIFT REG • coarse-grained (word-oriented) – ALUs, functional units 5Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
  6. 6. Computing Element Design Space flexibility general-purpose processor reconfigurable hardware domain-specificprogrammable processor application- specific processor application-specific hardware (ASIC)fixed function specialization performance 6 Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
  7. 7. Overview• The hardware/software interface – reconfigurable hardware – computing elements design space• The EPiCS approach – self-awareness at the hardware/software interface – hardware/software multithreading and heterogeneous multi-cores 7Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
  8. 8. The EPiCS Approach (www.epics-project.eu)• EPiCS studies proprioceptive computing systems – proprioceptive = self-aware + self-expressive – self-aware: learn and maintain knowledge about internal state & environment – self-expressive: determine actions based on goals, values, constraints• EPiCS looks at several levels of systems – compute node level (hw/sw interface) – network level – application level 8Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
  9. 9. Proprioception at the Hw/Sw Interface• Self-awareness: Knowledge about internal state & environment – utilization of resources, e.g. cores, interconnect, memories, I/O – temperature distribution, failing components – changing applications, workloads, quality of service constraints• Self-expression: Actions based on goals, values, constraints – assignment and migration of computations – thermal and power management, fault detection and recovery – hardware reconfiguration• Enable compute nodes to autonomously optimize at runtime – performance – resource usage – energy-efficiency – reliability 9Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
  10. 10. Hardware/Software Multithreading• Multithreading – applications are partitioned into threads – threads synchronize and communicate using abstractions provided by the operating system (e.g. semaphores, message boxes) sw sw sw sw thread thread thread thread sw hw thread thread operating system operating system• Multithreading as a unified programming and execution model for software and hardware – circuits are turned into hardware threads – eases programming and porting – allows for migrating between software and hardware 10Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
  11. 11. Heterogeneous Multi-Cores applications, quality of service requirements, system state CPU core CPU core CPU core (hardcore) (softcore) (softcore) sw sw sw thread thread thread novel OS layer novel OS layer novel OS layer interconnect novel OS layer novel OS layer monitoring core hw hw thread thread (proprioceptive sensors) reconfigurable reconfigurable hardware core hardware corethread assignment & migration,hardware reconfiguration,power & thermal management 11Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
  12. 12. ReconOS• Our operating system for heterogeneous multi-cores – leverages eCos and Linux operating systems – uses Xilinx FPGA technology (PowerPC and Blaze CPUs) – dynamic reconfiguration of hardware cores• ReconOS is open source and available for download – source code, tool chain, reference designs – documentation, tutorials – mailing lists http://github.com/epics/reconos 12Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
  13. 13. Summary• The hw/sw interface has shifted. Reconfigurable hardware allows us to adapt the hardware at runtime.• Proprioception (self-awareness/expression) at the compute node level enables us to adapt to changing system states and environments.• EPiCS uses multithreading as unified programming and execution model for heterogeneous multi-cores. 14Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
  14. 14. Further Reading• Reconfigurable hardware and computing [1] Katherine Compton and Scott Hauck. Reconfigurable Computing: A Survey of Systems and Software. In ACM Computing Surveys, 34(2):171-210. [2] Journals: ACM Transactions on Reconfigurable Technology and Systems. Hindawi International Journal of Reconfigurable Computing.• Self-awareness/expression in computing systems [3] R. Lewis, A. Chandra, S. Parsons, E. Robinson, K. Glette, R. Bahsoon, J. Torresen, and X. Yao. A survey of self-awareness and its application in computing systems. In Proc. Int. Conference on Self-Adaptive & Self-Organizing Systems (SASO), 2011.• Heterogeneous multi-cores [4] Enno Lübbers and Marco Platzner. ReconOS: Multithreaded Programming for Reconfigurable Computers. ACM Transactions on Embedded Computing Systems. 9(1):1-33, 2009. [5] Markus Happe, Enno Lübbers and Marco Platzner. A Self-adaptive Heterogeneous Multi-core Architecture for Embedded Real-time Video Object Tracking. In International Journal of Real-Time Image Processing, 2011, Springer Berlin/ Heidelberg. 15Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
  15. 15. Thanks for Your Interest! 16Self-awareness at the Hardware/Software Interface | Marco Platzner | December 2, 2011
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