CodePudding user response:
When a CPU access memory, memory is locked the CPU (exclusive), no other CPU can access memory, results in the decrease of efficiency,CodePudding user response:
Operating system provides bus locking mechanism, the FSB (also called CPU bus) is the main road all CPU and chipset connections, is responsible for all the parts of communication with the outside world, CPU including cache, memory, northbridge, its control bus sends a control signal to the parts sent via the address bus address signal specified to access components, two-way transmission, through the data bus