Achieving Fault Tolerance in Network on Chip(NoC) by Application Remapping

In this paper, a non-operational processor units detection and remapping algorithms named local swap(LS) is proposed. LS can be used to tolerate faulty processing elements in NoC. In contrast to existing methods namely- adaptive routing, flooding, error control coding and adaptive application remapping, LS first tries to find the faulty processing units. After detection, it will remap the IP cores which have communications with the IP core mapped to the faulty nodes. To evaluate the result, we use the benchmarks from TGFF[9]. Our experiments show that LS can save up to 8% power compared to other existing remapping algorithms. It is also observed that when the number of IP core becomes large, the power saving of LS over AR becomes more significant.