Deadlock Situation
A Deadlock Situation is a Concurrent Computing situation in which no member of some group of entities can proceed because each waits for another member, including itself, to take action.
- Context:
- It can be prevented and solved by deadlock detection algorithm.
- Example(s):
- a Distributed Deadlock,
- a Phantom Deadlock,
- …
- Counter-Example(s):
- an Infinite Loop,
- a Livelock,
- a Stalemate.
- See: Communication System, Concurrent Computing, Multiprocessing, Parallel Computing, Distributed Computing, Computer Synchronization, Operating System, Computing Process, Computing Thread, Process State, System Resource.
References
2022
- (Wikipedia, 2022) ⇒ https://en.wikipedia.org/wiki/Deadlock Retrieved:2022-11-15.
- In concurrent computing, deadlock is any situation in which no member of some group of entities can proceed because each waits for another member, including itself, to take action, such as sending a message or, more commonly, releasing a lock. Deadlocks are a common problem in multiprocessing systems, parallel computing, and distributed systems, because in these contexts systems often use software or hardware locks to arbitrate shared resources and implement process synchronization.
In an operating system, a deadlock occurs when a process or thread enters a waiting state because a requested system resource is held by another waiting process, which in turn is waiting for another resource held by another waiting process.[1] If a process remains indefinitely unable to change its state because resources requested by it are being used by another process that itself is waiting, then the system is said to be in a deadlock.[2]
In a communications system, deadlocks occur mainly due to loss or corruption of signals rather than contention for resources.
- In concurrent computing, deadlock is any situation in which no member of some group of entities can proceed because each waits for another member, including itself, to take action, such as sending a message or, more commonly, releasing a lock. Deadlocks are a common problem in multiprocessing systems, parallel computing, and distributed systems, because in these contexts systems often use software or hardware locks to arbitrate shared resources and implement process synchronization.
- ↑ Falsafi, Babak; Midkiff, Samuel; Dennis, JackB; Dennis, JackB; Ghoting, Amol; Campbell, Roy H; Klausecker, Christof; et al. (2011). "Deadlocks". Encyclopedia of Parallel Computing. Boston, MA: Springer US. pp. 524–527. doi:10.1007/978-0-387-09766-4_282. ISBN 978-0-387-09765-7. A deadlock is a condition that may happen in a system composed of multiple processes that can access shared resources. A deadlock is said to occur when two or more processes are waiting for each other to release a resource. None of the processes can make any progress.
- ↑ Silberschatz, Abraham (2006). Operating System Principles (7th ed.). Wiley-India. p. 237. ISBN 9788126509621. Archived from the original on 25 January 2022. Retrieved 16 October 2020.