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Introduction Scheduling/Process/CPU Scheduling is a fundamental function of an operating system. Strictly, all computer resources are scheduled before use/processing properly. Since CPU is one of the primary/superior computer resources, therefore its scheduling is must and central.  CPU scheduling is the …

Introduction Semaphores were introduced by Edsger Dijkstra and are commonly used in operating systems and concurrent programming. Definition Semaphores provide a mechanism for coordinating concurrent processes or threads and protecting shared resources from simultaneous access, thereby avoiding race conditions and …

A critical section in an operating system is a section of code that must be executed automatically, i.e., it must be completed without interruption from other processes or threads. It cannot be interrupted by other threads or processes.  In an …

Definition A Scheduler/Process Schedular is an operating system program (or module) that performs process scheduling i.e. selects/sets the next job to be submitted in the ready queue for execution. Features The main function/objective of a schedular is to process scheduling …

Introduction It is also called Process Table/Task Control Block/Switch Frame. Definition Process control block(PCB) is a data structure (actually in the form of array of structure) which contains several necessary information regarding the executing processes in tabular form. Features It …

Process State/Model : Introduction A process is defined as an entity . As we know that, a process is an independent entity which represents the basic unit of work to be implemented in the system and with its own input …