ASPDAC An application-centered Design Flow for Self Reconfigurable Systems implementation
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1 ASPDAC 2009 An application-centered Design Flow for Self Reconfigurable Systems implementation Fabio Cancare: Marco D. Santambrogio: Donatella Sciuto: 14th Asia and South Pacific Design Automation Conference Jan Yokohama, Japan
2 Rationale Dynamic reconfiguration is a new and promising technique, it can be applied to cope with: Lack of available resources System adaptability System reliability Main drawback: implementing DR systems is a complex and time-consuming task Model-based design paradigm allow the fast development of complex architecture Understand how it is possible to exploit the model-design paradigm in dynamic reconfigurable system implementation 2
3 Innovative Contribution Outline a model-based design flow for implementing large designs onto FPGAs with limited available resources 3
4 Outline Fundamental Concepts Proposed Flow High-level Modeling Phase Low-level Implementation Phase Case Study Results Conclusions and follows-up 4
5 Outline Fundamental Concepts Proposed Flow High-level Modeling Phase Low-level Implementation Phase Case Study Results Conclusions and follows-up 5
6 Reconfigurable Computing Reconfigurable computing is intended to fill the gap between hardware and software, achieving potentially much higher performance than software, while maintaining a higher level of flexibility than hardware (K. Compton and S. Hauck, Reconfigurable Computing: a Survey of Systems and Software, 2002) 6
7 Reasons Behind Applications often require performance which cannot be achieved by software Applications often require to be flexible, modifiable, adaptable. Traditional hardware cannot achieve such results Reconfigurable Computing techniques are able to alter a concrete architecture once it has been deployed onto a high-performance device, in order to meet: Resources constraints Adaptability constraints Reliability constraints 7
8 Outline Fundamental Concepts Proposed Flow High-level Modeling Phase Low-level Implementation Phase Case Study Results Conclusions and follows-up 8
9 Flow Overview Dynamic Partial Reconfiguration Flow composed of two phases: HLMP LLIP Support from system specification to system FPGA implementation 9
10 High Level Modeling Phase From the System Specification to the System Hardware Description 10
11 Simulink HDL Coder Compliant Models 11
12 Low Level Implementation Phase 12
13 Outline Fundamental Concepts Proposed Flow High-level Modeling Phase Low-level Implementation Phase Case Study Results Conclusions and follows-up 13
14 Real-world Application Inpeco Corporation proposed to implement an embedded vision system exploiting dynamic reconfiguration The goal is to provide functionalities such as: Mapping of the test-tubes within a rack Test-tube sample chromatic analysis Test-tube lateral recognition The system must also be as flexible as possible, since new functionalities may be required in the future 14
15 Overall Description 15
16 Real-world Application System Model 16
17 Outline Fundamental Concepts Proposed Flow High-level Modeling Phase Low-level Implementation Phase Case Study Results Conclusions and follows-up 17
18 Classical System The static system implementation uses 96.9% of targeted device, a Xilinx XC4VFX12FF FPGA, slices (and some functionalities are missing) RGB to grayscale Edge detection Base Arch. Circle detection Slot detection FPGA Logical view FPGA Physical view 18
19 Dynamic Reconfigurable System The dynamic reconfigurable implementation uses only 66.6% of available slices (26.0% of them can be reused) Base Arch. RFU Static Area Rec. Area FPGA Logical view 19 Free Area Physical view
20 Occupation Data Resource Type Slices Flip Flops 4 input LUTs LUTs used as logic LUTs used as shift registers LUTs used as RAMs Dynamic Reconfigurable System 20 Used Available Percentage % % % % % % System Component Base architecture RGB to grayscale Edge detector Circles detector Slots detector Slice Occupied Static System Slice Available Percenta ge 43.2% 3.9% 17.1% 26.0% 9.3%
21 Outline Fundamental Concepts Proposed Flow High-level Modeling Phase Low-level Implementation Phase Case Study Results Conclusions and follows-up 21
22 Conclusions and Follow-ups The model-based design paradigm has been successfully used as part of a dynamic reconfigurable system implementation flow The proposed flow has been employed to produce a first version of an industrial application Test the approach with other applications For what concerns the case study, it is necessary to implement the other functionalities and to introduce DMA 22
23 Any Question? Thank you very much! 23
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