Future systems will have to support multiple and concurrent dynamic compute-intensive applications, while respecting real-time and energy consumption constraints. With the increase in the design complexity of MPSoC architectures that must support these constraints, flexible and accurate simulators become a necessity for exploring the vast design space solutions. In this paper, we present an asymmetric MPSoC simulator environment, named SESAM. This tool can be used for the architecture exploration and optimization, and the design of a complete MPSoC solution for dynamic application processing. Its performances and capabilities are demonstrated through a complete MPSoC platform and an implementation of the component labeling algorithm.