Об этом курсе
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Программа курса: что вы изучите

Неделя
1
Часов на завершение
6 ч. на завершение

A Bird's Eye View on Adaptive Computing Systems

Nowadays the complexity of computing systems is skyrocketing. Programmers have to deal with extremely powerful computing systems that take time and considerable skills to be instructed to perform at their best. It is clear that it is not feasible to rely on human intervention to tune a system: conditions change frequently, rapidly, and unpredictably. It would be desirable to have the system automatically adapt to the mutating environment. This module analyzes the stated problem, embraces a radically new approach, and it introduces how software and hardware systems ca ben adjusted during execution. By doing this, we are going to introduce the Field Programmable Gate Arrays (FPGA) technologies and how they can be (re)configured....
Reading
7 videos (Total 29 min), 5 материалов для самостоятельного изучения, 5 тестов
Video7 видео
Reconfiguration in Everyday Life2мин
The Needs for Adaptation: an overview4мин
FPGA and reconfiguration: a 1st definition5мин
Runtime management2мин
Programmable System-on-Chip4мин
Programmable System-on-Multiple Chip6мин
Reading5 материала для самостоятельного изучения
Self-Aware Adaptation in FPGA-based Systems [suggested readings]30мин
Self-Awareness as a Model for Designing and Operating Heterogeneous Multicores [suggested readings]мин
Reconfigurable computing: a survey of systems and software [suggested readings]мин
ReconOS: An Operating System Approach for Reconfigurable Computing [suggested readings]30мин
R3TOS-Based Autonomous Fault-Tolerant Systems [suggested readings]30мин
Quiz5 практического упражнения
Reconfigurations15мин
History of Reconfiguration8мин
FPGA and reconfiguration6мин
Programmable SoC Vs SoMCs7мин
Runtime management4мин
Часов на завершение
5 ч. на завершение

An introduction to Reconfigurable Computing

Traditionally, computing was classified into General-Purpose Computing performed by a General-Purpose Processor (GPP) and Application-Specific Computing performed by an Application-Specific Integrated Circuit (ASIC). As a trade-off between the two extreme characteristics of GPP and ASIC, reconfigurable computing has combined the advantages of both. On one hand reconfigurable computing can have better performance with respect to a software implementation but paying this in terms of time to implement. On the other hand a reconfigurable device can be used to design a system without requiring the same design time and complexity compared to a full custom solution but being beaten in terms of performance. The main advantage of a reconfigurable system is its high flexibility, while its main disadvantage is the lack of a standard computing model. In this module we are presenting a first definition of reconfigurable computing, describing the rationale behind it and introducing how this field has been influenced by the introduction of the FPGAs....
Reading
5 videos (Total 27 min), 4 материалов для самостоятельного изучения, 2 тестов
Video5 видео
Reconfigurable Computing: HW vs SW3мин
On how to improve the Reconfigurable computing performance via CAD improvements3мин
FPGA-Based Reconfigurable Computing3мин
System design space exploration and rationale behind partial reconfiguration15мин
Reading4 материала для самостоятельного изучения
A platform-independent runtime methodology for mapping multiple applications onto FPGAs through resource virtualization [suggested readings]45мин
A Heterogeneous Multicore System on Chip with Run-Time Reconfigurable Virtual FPGA Architecture [suggested readings]мин
Partitioning and Scheduling of Task Graphs on Partially Dynamically Reconfigurable FPGAs [suggested readings]мин
A Mapping-Scheduling Algorithm for Hardware Acceleration on Reconfigurable Platforms [suggested readings]30мин
Quiz2 практического упражнения
Reconfigurable Computing Module10мин
Performance4мин
Неделя
2
Часов на завершение
4 ч. на завершение

Reconfigurable Computing and FPGAs

From the mid-1980s, reconfigurable computing has become a popular field due to the FPGA technology progress. An FPGA is a semiconductor device containing programmable logic components and programmable interconnects but no instruction fetch at run time, that is, FPGAs do not have a program counter. In most FPGAs, the logic components can be programmed to duplicate the functionality of basic logic gates or functional Intellectual Properties (IPs). FPGAs also include memory elements composed of simple flip-flops or more complex blocks of memories. Hence, FPGA has made possible the dynamic execution and configuration of both hardware and software on a single chip. This module provides a detailed description of FPGA technologies starting from a general description down to the discussion on the low-level configuration details of these devices, to the bitstream composition and the description of the configuration registers....
Reading
8 videos (Total 36 min), 3 материалов для самостоятельного изучения, 2 тестов
Video8 видео
FPGA Basic Block: CLBs and IOBs6мин
FPGA Basic Block: Interconnections5мин
FPGA Configuration: an overview2мин
More Details on How To Configure and FPGA: the bitstream files4мин
Bitstream Composition4мин
Configuration Registers6мин
How to handle the complexity of an FPGA-based system4мин
Reading3 материала для самостоятельного изучения
Note on the "Resources"1мин
Physical design for FPGAs [suggested readings]30мин
Multi-Million Gate FPGA Physical Design Challenges [suggested readings]30мин
Quiz2 практического упражнения
Getting familiar with FPGAs34мин
FPGA configuration and Bitstream10мин
Часов на завершение
1 ч. на завершение

Examples on how to configure an FPGA

FPGA design tools must provide a design environment based on digital design concepts and components (gates, flip-flops, MUXs, etc.). They must hide the complexities of placement, routing and bitstream generation from the user. This module is not going through these steps in details, an entire course will be needed just for this, but it is important at least to have an idea of what it is happening behind the scene to better understand the complexity of the processes carried out by the tools you are going to use. Within this context, this module guides you through a simple example, which is abstracting the complexity of the underlying FPGA, starting from the description of the circuit you may be willing to implement to the bitstream used to configure the FPGA....
Reading
6 videos (Total 42 min), 2 тестов
Video6 видео
From the LUT to the CLB configuration example8мин
A simplified FPGA and its configuration settings4мин
An Example on how to implement a circuit on a simplified FPGA8мин
An Example on how to implement a circuit on a simplified FPGA: bitstram generation phase - CLBs5мин
An Example on how to implement a circuit on a simplified FPGA: bitstram generation phase - SBs and routing4мин
Quiz2 практического упражнения
LUT and CLB4мин
Physical design4мин
Неделя
3
Часов на завершение
5 ч. на завершение

An Introduction to Reconfigurations

Before continuing in this terrific journey in the reconfigurable computing area, it can be useful to define a common language. Obviously, some of these terms have been already used but it is now time to better understand them and to make some order before continuing with more advanced concepts. Furthermore, as we know, FPGA configuration capabilities allow a great flexibility in hardware design and, as a consequence, they make it possible to create a vast number of different reconfigurable systems. These can vary from systems composed of custom boards with FPGAs, often connected to a standard PC or workstation, to standalone systems including reconfigurable logic and General Purpose Processors, to System-on-Chip's, completely implemented within a single FPGA mounted on a board, with only few physical components for I/O interfacing. There are different models of reconfiguration, and a scheme to classify them is presented in this module. We can consider this module as a transitional/turning point module. We have been exposed to some terminology and concepts and we are now ready to move forward. To do this, we need to combine all the pieces of the puzzles together and to invest a bit at looking at the overall picture, and this is exactly what this module has been designed for....
Reading
5 videos (Total 35 min), 2 материалов для самостоятельного изучения, 2 тестов
Video5 видео
The 5 W's6мин
Reconfigurable Computing as an Exstension of HW/SW Codesing5мин
A Classification of SoC Reconfigurations8мин
A Classification of SoMC Reconfigurations9мин
Reading2 материала для самостоятельного изучения
Design methodology for partial dynamic reconfiguration: a new degree of freedom in the HW/SW codesign [suggested readings]мин
Performance of partial reconfiguration in FPGA systems: A survey and a cost model [suggested readings]мин
Quiz2 практического упражнения
Functionalities and their implementations4мин
Module Review10мин
Часов на завершение
5 ч. на завершение

Towards Partial Dynamic Reconfiguration and Complex FPGA-based systems

The reconfiguration capabilities of FPGAs give the designers extended flexibility in terms of hardware maintainability. FPGAs can change the hardware functionalities mapped on them by taking the application offline, downloading a new configuration on the FPGA (and possibly new software for the processor, if any) and rebooting the system. Reconfiguration in this case is a process independent of the execution of the application. A different approach is the one that considers reconfiguration of the FPGA as part of the application itself, giving it the capability of adapting the hardware configured on the chip resources according to the needs of a particular situation during the execution time. In this case we are referring to this reconfiguration as dynamic reconfiguration and the reconfiguration process is seen as part of the application execution, and not as a stage prior to it. This module illustrates a particular technique, which is extending the previous two, that has been viable for most recent FPGA devices, Partial Dynamic Reconfiguration. To fully understand what this technique is, the concepts of reconfigurable computing, static and dynamic reconfiguration, and the taxonomy of dynamic reconfiguration itself must be analyzed. In this way partial dynamic reconfiguration can be correctly placed in the set of system development techniques that it is possible to implement on a modern FPGA chip....
Reading
8 videos (Total 40 min), 4 материалов для самостоятельного изучения, 2 тестов
Video8 видео
How to use FPGA Reconfiguration to face area issues5мин
How to deal with the Reconfiguration runtime overhead3мин
Recurring modules to reuse them to reduce the Reconfiguration time3мин
Partial Reconfiguration to reduce the Reconfiguration runtime overhead5мин
Runtime management to explore alternative implementations5мин
Bitstreams relocation6мин
Bitstreams relocation and virtual homogeneity3мин
Reading4 материала для самостоятельного изучения
Operating system runtime management of partially dynamically reconfigurable embedded systems [suggested readings]мин
Core Allocation and Relocation Management for a Self Dynamically Reconfigurable Architecture [suggested readings]мин
A runtime relocation based workflow for self dynamic reconfigurable systems design [suggested readings]мин
Partial Dynamic Reconfiguration in a Multi-FPGA Clustered Architecture Based on Linux [suggested readings]30мин
Quiz2 практического упражнения
Reconfigurable System6мин
Partial reconfiguration6мин
Неделя
4
Часов на завершение
8 ч. на завершение

Design Flows

After presenting different solutions proposed to design and implement dynamic reconfigurable systems, this module will describe a general and complete design methodology that can be followed as a guideline for designing reconfigurable computing systems. To design and implement a reconfigurable computing system, designers need Computer-Aided Design (CAD) tools for system design and implementation, such as a design analysis tool for architecture design, a synthesis tool for hardware construction, a simulator for hardware behavior simulation, and a placement and routing tool for circuit layout. We may build these tools ourselves or we can also use commercial tools and platforms for reconfigurable system design. The first choice implies a considerable investment in terms of both time and effort to build a specific and optimized solution for the given problem, while the second one allows the re-use of knowledge, cores, and software to reach a good solution to the same problem more rapidly. This module is guiding the students through an historical view on how CAD frameworks evolved through the years. This is done to show how fast the technology is evolving and the rationale behind the choice made to improve the users experience when working with an FPGA-based system. Not only commercial tools are described, but also the personal journey done by the course instructor and his research team, starting from his early days as a PhD up to the research challenges they are nowadays working on....
Reading
9 videos (Total 54 min), 7 материалов для самостоятельного изучения, 3 тестов
Video9 видео
Partial Reconfiguration Design Flows4мин
Xilinx Difference Based Partial Reconfiguration5мин
Xilinx Module Based Partial Reconfiguration5мин
Xilinx Partial Reconfiguration (PR) Flow5мин
Moudle Based vs Partial Reconfiguration Design Flows17мин
Rationale behind DRESD and the work done by the Politecnico di Milano3мин
From DRESD to CHANGE and ASAP, two new research initiatives from the Politecnico di Milano4мин
CAOS: from embedded to heterogeneous distributed FPGA-based computing systems3мин
Reading7 материала для самостоятельного изучения
Vivado Design Suite Tutorial, Partial Reconfiguration, UG947 (v2016.1) April 6, 2016 [suggested readings - handbook - PDF]30мин
Vivado Design Suite User Guide, Partial Reconfiguration, UG909 (v2016.1) April 6, 2016 [suggested readings - handbook - PDF]мин
Dynamic Reconfigurability in Embedded System Design [suggested readings]30мин
A design methodology for dynamic reconfiguration: the Caronte architecture [suggested readings]30мин
Floorplanning Automation for Partial-Reconfigurable FPGAs via Feasible Placements Generation [suggested readings]45мин
Heterogeneous exascale supercomputing: The role of CAD in the exaFPGA project [suggested readings]30мин
The Role of CAD Frameworks in Heterogeneous FPGA-Based Cloud Systems [suggested readings]30мин
Quiz3 практического упражнения
Abstractions2мин
Politecnico di Milano Partial Reconfiguration Research Initiatives6мин
Design flows2мин
Часов на завершение
5 ч. на завершение

Closing remarks and future directions

We are working at the edge of the research in the area of reconfigurable computing. FPGA technologies are not used only as standalone solutions/platforms but are now included into cloud infrastructures. They are now used both to accelerate infrastructure/backend computations and exposed as-a-Service that can be used by anyone. Within this context we are facing the definition of new research opportunities and technologies improvements and the time cannot be better under this perspective. What it is needed now is new platform creation tools, monitoring and profiling infrastructure, better runtime management systems, static and dynamic workload partitioning, just to name a few possible areas of research. This module is concluding this course but posing interesting questions towards possible future research directions that may also point the students to other Coursera courses on FPGAs....
Reading
1 video (Total 5 min), 3 материалов для самостоятельного изучения, 1 тест
Reading3 материала для самостоятельного изучения
Virtualized Execution Runtime for FPGA Accelerators in the Cloud [suggested readings]45мин
A cloud-scale acceleration architecture [suggested readings]мин
Enabling Flexible Network FPGA Clusters in a Heterogeneous Cloud Data Center [suggested readings]30мин
Quiz1 практическое упражнение
Closing remarks and future directions2мин

Преподаватель

Avatar

Marco Domenico Santambrogio

Associate Professor
DEIB - Dept. of Electronics, Information and Bioengineering

О Politecnico di Milano

Politecnico di Milano is a scientific-technological University, which trains engineers, architects and industrial designers. From 2014 Politecnico di Milano started the release of several MOOCs, developed by the service for digital learning METID (Methods and Innovative Technologies for Learning), giving everybody the chance to enhance personal skills....

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