Interconnection of two or more CPUs with memory and input-output equipment.
The term “processor” in multiprocessor can mean either a central processing unit (CPU) or an input-output processor (IOP).
The components that forms multiprocessor are CPUs , IOPs connected to input output devices, and memory unit.
More than one processor with common memory, shared between processors.
Multiprocessors are classified as multiple instruction stream, multiple data stream (MIMD) systems.
3. INTRODUCTION
• Interconnection of two or more CPUs with memory and input-output
equipment.
• The term “processor” in multiprocessor can mean either a central
processing unit (CPU) or an input-output processor (IOP).
• The components that forms multiprocessor are CPUs , IOPs connected
to input output devices, and memory unit.
• More than one processor with common memory, shared between
processors.
• Multiprocessors are classified as multiple instruction stream, multiple
data stream (MIMD) systems.
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5. Difference Between Multiprocessor
And Multicomputer
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Multiprocessor Multicomputer
• Multiple processors within a single
computer.
• An interlinked multiple autonomous
computer.
• Singly shared memory • Distributed memory.
• Necessary for the processing elements
to communicate with each other.
• Not required for elements being
processed to communicate.
• Dynamic network. • Static network.
• Example of multiprocessor is a sequent
symmetry S-81.
• Example of a multicomputer is a
message passing multicomputer.
6. • Multiprocessor are classified by the way their memory is organized.
Shared-memory or tightly coupled
multiprocessor.
Distributed-memory or loosely coupled
multiprocessor.
How multiprocessor are classified?
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7. TIGHTLY COUPLED MULTIPROCESSOR.
Shared memory
A global common memory that all CPUs can access
Data rate is high
Modules are connected through PMIN, (processor to memory
inter connection network), IOPIN (input output IN), and ISIN
networks (interrupt signal inter connection network)
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11. 11
S.NO Loosely Coupled Tightly Coupled
1. distributed memory shared memory
2. Low data rate. high data rate.
3. Less costly. more costly.
4.
modules are connected through Message
transfer system network.
While there is PMIN, IOPIN and ISIN networks.
5. Memory conflicts don’t take place. have memory conflicts.
6. low degree of interaction between tasks. high degree of interaction between tasks.
7.
direct connection between processor and I/O
devices.
IOPIN helps connection between processor and
I/O devices.
8.
Applications are in distributed computing
systems.
Applications are in parallel processing systems.