Ruprecht-Karls-Universität Heidelberg

A Bandwidth Optimized Approach for Point-to-Point Topologies using EXTOLL

Project Report by Juri Schmidt


The ever increasing need for computing capacity led to new architectures in the past. Especially upcoming tasks must be leveraged by the use of parallel computer architectures. The biggest disadvantage of distributed systems is that they suffer from excessive message latencies. This work is based on the high performance interconnection network EXTOLL, which features submicro second message latencies. To meet the required bandwidth of 10GB/s for an image processing application, the EXTOLL functional units are replaced with simpler versions, namely framer and deframer. Therefore the purpose of these units and their implementation is presented. The target device is a Xilinx Virtex7 FPGA. With 187.5MHz operating frequency and 512-bit datapaths, the proposed design theoretically reaches 11.175GB/s.


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