Blocs nuls dans la hiérarchie mémoire

e memory hierary undergoes a growing pressure. is pressure has been dueto the increasing frequency of the processors. However, now that the frequency staysaround 3 GHz, the number of execution cores and thus the number of processes runningsimultaneously are increasing.e growing number of requests handled by the memoryhierary leads to bandwidth saturation.is study shows that the memory hierary is oen used to transport null datablos. ese trivial value blos are particularly numerous in the last level cae and inthe main memory. We propose in this thesis to use the Zero-Content Augmented Cae,a cae specialized in the management of these null blos. It consists of a traditional ca-e and a cae dedicated to null blos. is proposal allows increasing overall systemperformance and significantly reducing memory bandwidth usage. In this document,we also propose the Decoupled Zero-Compressed Memory, a compressed memory ar-itecture also using the null blos. is compressed memory can store a working-setgreater than the size of the physical memory, and thus significantly reduce the numberof accesses to the mass storage devices.