Mode Changes in Network-on-Chip Based Multiprocessor Platforms |
Ioannis Kotleas
|
| Abstract | As the operating frequency of computer systems has reached a standstill, modern computer architectures lean towards concurrency and Multi-Processor System-on-Chip (MPSoC) solutions to increase performance. These architectures use Networks-on-Chip (NoC) to provide sufficient bandwidth for the Message Passing Interface (MPI) among the integrated processors. T-CREST is a Network-on-Chip based general-purpose time-predictable multi-processor platform for hard real-time applications. The T-CREST NoC uses static bandwidth allocation, which is constant throughout the execution. In this thesis we extend the T-CREST MPI with a mode change module that enables the reallocation of the NoC bandwidth during run-time. For this purpose we use a dedicated broadcast network with tree topology and a mode change controller, which is driven by a master processor. The designed module respects the time-predictability asset of T-CREST and manages the mode changes transparently to the tasks execution, providing the flexibility to the programmer of the general-purpose T-CREST platform to define the policy under which the mode changes are performed. The mode change extended T-CREST platform is prototyped on an FPGA and it is shown that the resource overhead is very small. |
| Type | Master's thesis [Academic thesis] |
| Year | 2014 |
| Publisher | Technical University of Denmark, Department of Applied Mathematics and Computer Science |
| Address | Richard Petersens Plads, Building 324, DK-2800 Kgs. Lyngby, Denmark, compute@compute.dtu.dk |
| Series | DTU Compute M.Sc.-2014 |
| Note | |
| Electronic version(s) | [pdf] |
| Publication link | http://www.compute.dtu.dk/English.aspx |
| BibTeX data | [bibtex] |
| IMM Group(s) | Computer Science & Engineering |