NightWatch is an extension of memory management system that provides general, transparent and low-overhead cache pollution control. NightWatch extends the memory mapping into two types: restrictive-mapping and open-mapping. The restrictive-mapping is used for restricting the pollution effect of the poor locality data, while the open-mapping is used for cache friendly data. When a malloc request arrives, NightWatch will predict the access locality of the to be allocated memory, determine the proper cache demand, and select the right mapping type for the malloc request. NightWatch is based on the observation that data within the same memory chunk or chunks within the same allocation context often share similar locality property. NightWatch embodies this observation by online monitoring current cache locality to predict future behavior and restricting potential cache polluters proactively. - View it on GitHub