7Interrupts and Interrupt Handlers.docx

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文件名称：7Interrupts and Interrupt Handlers.docx
文件大小：543KB
文件格式：DOCX
更新时间：2020-08-12 08:25:15
Linux kernel A core responsibility of any operating system kernel is managing the hardware connected to the machine—hard drives and Blu-ray discs, keyboards and mice, 3D processors and wireless radios. To meet this responsibility, the kernel needs to communicate with the machine’s individual devices. Given that processors can be orders of magnitudes faster than the hardware they talk to, it is not ideal for the kernel to issue a request and wait for a response from the significantly slower hardware. Instead, because the hardware is comparatively slow to respond, the kernel must be free to go and handle other work, dealing with the hardware only after that hardware has actually completed its work.