Improving Performance of Software Fault Tolerance Techniques Using Multi-Core Architecture

This research shows the influence of using multi-core architecture in decrease of execution time and increase of performance of two software fault tolerance techniques: (1) N-version Programming and (2)Consensus Recovery Block, which have superiority over other software fault tolerance techniques. Accordingly, our implementations were performed based on these two methods. Because the comparison between these two methods showed that the Consensus Recovery Block is more reliable, we proposed a technique named Improved Consensus Recovery Block technique for improving the technique performance. The proposed technique both includes higher performance and has reliability same as the consensus recovery block technique. The performance improvement is based on multi-core architecture where each core is responsible for the execution of a version of software key units. As a result, by concurrent execution of versions, the total execution time is decreased leading to performance improvement.