The full form of ACE protocol is AXI Coherency Extensions.
This protocol represents an enhancement to the widely used AXI (Advanced eXtensible Interface) standard. Its primary purpose is to facilitate cache coherency in systems with multiple processing cores, commonly found in multi-core processors and Systems-on-Chip (SoCs). By ensuring that all cores have a consistent view of memory, the ACE protocol helps to streamline and optimize performance in complex computing environments. This is especially crucial in scenarios where different cores need to access and modify the same data simultaneously.