Os Process Management Questions
Process creation refers to the creation of a new process by an existing process. It involves allocating resources, such as memory and CPU time, to the new process. Process creation is typically done through a system call provided by the operating system.
The steps involved in process creation are as follows:
1. Requesting process creation: The parent process requests the operating system to create a new process. This can be done through system calls like fork() or createProcess().
2. Allocating process control block (PCB): The operating system allocates a PCB to the new process. PCB contains information about the process, such as process ID, program counter, register values, and other necessary data.
3. Allocating memory: The operating system allocates memory space for the new process. This includes code, data, and stack segments.
4. Copying parent process: In most cases, the new process is a copy of the parent process. The operating system creates a duplicate of the parent process, including its code, data, and stack segments.
5. Setting up process context: The operating system initializes the process context, including setting the initial values of registers, program counter, and other necessary data.
6. Assigning process priority: The operating system assigns a priority to the new process based on scheduling algorithms.
7. Adding process to process table: The operating system adds the new process to the process table, which keeps track of all active processes.
8. Resuming execution: Finally, the new process is ready to execute, and the operating system schedules it for execution.
Overall, process creation involves requesting the operating system to create a new process, allocating necessary resources, copying the parent process, setting up the process context, assigning priority, and adding the process to the process table.