An efficient data structure for dynamic two-dimensional reconfiguration

S. Fekete,J. Reinhardt,Christian Scheffer

Published 2016 in Journal of systems architecture

ABSTRACT

In the presence of dynamic insertions and deletions into a partially reconfigurable FPGA, fragmentation is unavoidable. This poses the challenge of developing efficient approaches to dynamic defragmentation and reallocation. One key aspect is to develop efficient algorithms and data structures that exploit the two-dimensional geometry of a chip, instead of just one. We propose a new method for this task, based on the fractal structure of a quadtree, which allows dynamic segmentation of the chip area, along with dynamically adjusting the necessary communication infrastructure. We describe a number of algorithmic aspects, and present different solutions. We also provide experimental data for various scenarios, indicating practical usefulness of our approach.

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