Abstract: A processor, a signal adjustment method, and a computer system including the processor are provided, pertaining to the field of computer technologies. The processor includes a memory controller. The memory controller includes a memory physical interface and a first processor core, and the first processor core is connected to the memory physical interface. After the computer system is started and during a running process of the computer system, the first processor core is configured to adjust a timing relationship between a target signal of the memory physical interface and a synchronization signal of the target signal. According to this application, timing alignment can be ensured between the target signal and the synchronization signal, thereby improving correctness of sampling performed on the target signal.