In “Handler Migration and Direct Interrupt Scheduling,” Jupyung Lee and Kyu Ho Park of the Korea Advanced Institute of Science and Technology describe two techniques to minimize the scheduling latency ...

For most UNIX systems, Linux included, device drivers typically divide the work of processing interrupts into two parts or halves. The first part, the top half, is the familiar interrupt handler, ...

In a System-on Chip(SoC),a general interrupt process works as follows: Interrupt is triggered by a certain system event or interrupt source. Interrupt is detected by system’s peripheral module, which ...

When a WFI instruction is executed or when the processor enters sleep mode using the Sleep-On-Exit feature, the processor stops instruction execution and wakes up when an (higher priority) interrupt ...

If there is an interrupt present then it will trigger the interrupt handler, the handler will stop the present instruction which is processing and save its configuration in a register and load the ...

A new interface for implementing device drivers outside the kernel has one project saving about 5,000 lines of code. The concept of supporting user-space drivers has appeared on LWN a few times before ...

We often take our “SoftwareSerial” libraries for granted, and don’t investigate what goes on under the hood — until they fail us, at least. Would you like to learn how to harness the power of ...

Real-Time Linux (RTLinux) is a small hard real-time kernel that can run Linux as its lowest priority thread. Begun as a free software project at New Mexico Tech in 1994, RTLinux is now being used in ...