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Round robin
Round Robin (RR) is a scheduling algorithm used in operating systems to ensure fair and efficient resource allocation among multiple processes vying for acc...
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Round Robin (RR) is a scheduling algorithm used in operating systems to ensure fair and efficient resource allocation among multiple processes vying for acc...
Round Robin (RR) is a scheduling algorithm used in operating systems to ensure fair and efficient resource allocation among multiple processes vying for access to the CPU.
How it works:
Initialization: All processes in the system are initially assigned a CPU share (typically equal CPU time).
Allocation: The operating system randomly selects a process from the queue based on a pre-defined algorithm.
Run: Once allocated the CPU, the selected process starts executing and can use the CPU for its own purposes.
Switch: After the allocated time, the operating system pauses the process and gives the CPU to the next process in the queue.
Repeat: This process repeats until all processes have had their CPU time or a pre-determined time interval passes.
Benefits of RR:
Fairness: RR ensures that all processes have an equal opportunity to use the CPU, regardless of their priority or execution requirements.
Efficiency: By scheduling processes in a round robin fashion, RR eliminates idle time and minimizes context switches, improving overall system performance.
Scalability: RR is suitable for systems with multiple CPUs, allowing processes to be allocated and switched among them efficiently.
Drawbacks of RR:
Starvation: If a process is allocated the CPU for a long time, it can starve other processes in the queue, leading to starvation and system performance degradation.
Context switching overhead: RR involves significant context switching overhead, which can impact performance for processes with complex workflows.
Queue blocking: If the CPU is assigned to a process in the middle of executing some operation, it blocks other processes in the queue, leading to queue blocking.
Examples:
In a multi-core system, RR can be used to allocate CPU time among multiple processes running in the background.
RR is commonly used in operating systems to manage time-sharing and prioritize server workloads.
In real-world scenarios, scheduling algorithms like RR can be implemented to manage resource allocation and ensure fairness among processes