hardware interrupts;  interrupt response;  Performance analysis

The internal mechanism of hardware interrupt service implementation and the response performance of the system to interrupt signal of 32-bit Windows system are analyzed, and the influence of interrupt frequency, interrupt mode, scheduling mode and other factors on the real-time response performance of Windows hardware interrupt is discussed by comparing the interrupt delay obtained in various test environments. It is pointed out that in the case of unavoidable interrupt delay in 32-bit Windows system, the use of non-shared interrupt and appropriate scheduling methods can relatively reduce the interrupt delay and improve the real-time response performance of hardware interrupts.