Difference between tightly coupled and loosely coupled multiprocessor system | Shared Memory v/s Distributed Memory

Parameters Tightly Coupled Multiprocessors Loosely Coupled Multiprocessor
Memory: Shared Memory Distributed Memory
Contention: High Low
Scalability: Low High

Delay: Low High
Data Rate: High Low
Cost: High Low
Type of Interconnection Network Dynamic Static
Operating System: Single OS Multiple OS

Cache: Assign according to the need of Processing Elements Each Process have their own cache m/m
Throughput High Low
Security: High Low
Space: Low High
Power Consumption: Low High
Flexibilty: Low (not reusable) High (reusable)
Example: Zeon Processor Beowulf Cluster

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