A system for detecting, reporting and responding to network node-level occurrences on a network-wide level includes one or more first mobile agents, each of the one or more first mobile agents is hosted by one of a plurality of nodes in the network. The image information detection section 130 and the self-luminous image display section 120 are attached together in a back-to-back arrangement. When a request from the L1 cache misses in the L2 cache, the L2 cache sends a fill request to memory.