Computing System Process
A Computing System Process is an instance of a software program running in a computing system.
- AKA: Computer Process.
- Context:
- It can serve some Computing System Function.
- …
- Example(s):
- a Java-based Process.
- the Web Server process serving this webpage request.
- …
- Counter-Example(s):
- See: Computing System, Computer Program, Thread.
References
2011
- (Wikipedia, 2011) ⇒ http://en.wikipedia.org/wiki/Process_%28computing%29
- In computing, a process is an instance of a computer program that is being executed. It contains the program code and its current activity. Depending on the operating system (OS), a process may be made up of multiple threads of execution that execute instructions concurrently.[1][2]
A computer program is a passive collection of instructions; a process is the actual execution of those instructions. Several processes may be associated with the same program; for example, opening up several instances of the same program often means more than one process is being executed.
Multitasking is a method to allow multiple processes to share processors (CPUs) and other system resources. Each CPU executes a single task at a time. However, multitasking allows each processor to switch between tasks that are being executed without having to wait for each task to finish. Depending on the operating system implementation, switches could be performed when tasks perform input/output operations, when a task indicates that it can be switched, or on hardware interrupts.
- In computing, a process is an instance of a computer program that is being executed. It contains the program code and its current activity. Depending on the operating system (OS), a process may be made up of multiple threads of execution that execute instructions concurrently.[1][2]
- ↑ SILBERSCHATZ, Abraham; CAGNE, Greg, GALVIN, Peter Baer (2004). "Chapter 4 - Processes". Operating system concepts with Java (Sixth Edition ed.). John Wiley & Sons, Inc.. ISBN 0-471-48905-0.
- ↑ Vahalia, Uresh (1996). "2 - The Process and the Kernel". UNIX Internals - The New Frontiers. Prentice-Hall Inc.. ISBN 0131019082.
2009
- (Wikipedia, 2009) ⇒ http://en.wikipedia.org/wiki/Process_%28computing%29
- QUOTE:... For security and reliability reasons most modern operating systems prevent direct communication between 'independent' processes, providing strictly mediated and controlled inter-process communication functionality.
1996
- (Wall et al., 1996) ⇒ Larry Wall, Tom Christiansen, and Randal L. Schwartz. (1996). “Programming Perl, 2nd edition." O'Reilly. ISBN:1565921496
- QUOTE:process: An instance of a running program. Under multi-tasking systems like UNIX, two or more separate processes could be running the same program independently at the same time - in fact, the fork function is designed to bring about this happy state of affairs. Under other operating systems processes are sometimes called "tasks" or "jobs".