Disk Scheduling

Inside Modern Operating Systems Scheduling Memory and I/O In modern computers, three core concerns shape performance: scheduling CPU time, managing memory, and ordering I/O operations. The operating system uses specialized components to balance responsiveness, throughput, and fairness. How these pieces work together shows up as smooth interactions, fast file access, and steady app behavior across many devices. CPU scheduling decides which task runs next. Some systems switch tasks after a short time slice; others use priorities to favor foreground work. Preemptive scheduling can reduce latency for interactive apps, while simple round-robin schemes keep things fair. Real systems blend approaches: a general task gets a fair share, while important tasks get a little more speed when needed. The result is snappy user interfaces and decent progress for background jobs, even on many-core machines. ...

Operating Systems: Scheduling, Memory, and I/O Operating systems coordinate the work of a computer by three core areas: scheduling, memory management, and I/O. Scheduling decides which process runs next on the CPU, memory keeps data and code ready for fast access, and I/O moves data between the computer and devices. A clear design in these areas helps apps feel fast and responsive for users and programs alike. Scheduling CPU scheduling chooses the next task from the ready queue and assigns the CPU. Simple policies work well in different settings: ...