Parallel Systems
Multiprocessor systems
with more than on CPU in close communication.
Tightly
coupled system –
processors share memory and a clock; communication usually takes place through
the shared memory.
Advantages of parallel
system:
Increased throughput
Economical
Increased reliability
graceful
degradation
fail-soft
systems
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
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