Beyond Multiprocessing ... Multithreading the SunOS Kernel

Preparing the SunOS/SVR4 kernel for today’s challenges: symmetric multiprocessing, multi-threaded applications, real-time, and multimedia, led to the incorporation of several innovative techniques. In particular, the kernel was re-structured around threads. Threads are used for most asynchronous processing, including interrupts. The resulting kernel is fully preemptible and capable of real-time response. The combination provides a robust base for highly concurrent, responsive operation.