Process Control

Process State

As the process proceeds it changes sates. The state of a process is define by the current activity of that process.

Each process may be in one of the following state.

· 

        New  -

A process that has just been created but has not admitted to the pool of executable process by the operating system. A new process is not lodes into main memory.

·       Ready

                                                A process that prepare to execute when assigned the processor.

·       Running

                                                A process that is currently being executed.in a single processor system at most one processor can be in this state at a time.

·       Waiting/Blocked

                                                The process is waiting for some event to occur. Such as an I/O completion or (reception of a signal). A process is waiting/blocked state cannot be execute until the desired event occurs.

·       Terminated /Exit

                                                                A process that has been released from the pool of executable process by the operating system either because it has finished execution or because it has halted for some reason.