PARALLEL SYSTEMS
- Multiprocessor systems with more than one CPU in close communication.
- Tightly coupled system – processors share memory and aclock; communication usually takes place through the shared memory.
- Symmetric multiprocessing (SMP)
·Each processor runs and identical copy of the operating system.
·Many processes can run at once without performance deterioration.
·Most modern operating systems support SMP
- Asymmetric multiprocessing
·Each processor is assigned a specific task; master processor schedules and allocated work to slave processors.
· More common in extremely large systems
Advantages of parallel system:
1. Increased throughput
2. Economical
3. Increased reliability
3.1. graceful
3.2. degradationfail-soft systems
0 comments:
Post a Comment