An In-Memory Monitoring Database For Self Adaptive MP²SoCs

International audience; The complexity of MP²SoC architectures to come is such that many issues arise simultaneously, such as multicore programming, system performance, reliability, scalability, etc. The key to solve these issues is self-adaptability: the chips to come have to integrate the required software and hardware means to monitor and self-react to the various kinds of events that are likely to occur during chip's lifetime. The paper describes the design principles of a software based approach used to monitor manycore architectures running multi-threaded functional applications. The approach takes advantage of an in-memory database (as well as appropriate means to store, handle, and retrieve accumulated monitoring data) to achieve the monitoring task as simply as possible. After a presentation of the distributed database (called DRET), a case study is presented, along with performance results that clearly show the interest of the approach.