In the realm of operating systems, Linux stands as a paragon of multitasking prowess, enabling the concurrent execution of a multitude of tasks, far surpassing the actual count of CPUs. However, it’s essential to discern that these tasks aren’t truly operating simultaneously, especially in the context of a single CPU system.
Instead, Linux orchestrates a dynamic allocation of CPU resources among tasks, cycling through them in rapid succession. This ingenious process generates the illusion of parallel execution, a hallmark of Linux’s efficient multitasking design.
CPU Context: A Prelude to Task Execution
In the intricate dance of task execution within a computer’s CPU, lies the critical concept of CPU context. Before a task can commence its journey through the labyrinth of computation, the CPU requires precise instructions on where to begin. This entails the system’s assistance in configuring CPU registers and program counters, laying the groundwork for seamless task execution.
CPU registers, akin to nimble couriers within the CPU’s domain, play a pivotal role in this orchestration. These petite yet lightning-fast memory units, nestled within the CPU’s architecture, serve as repositories for essential data and instructions. Among them, the program counter…
