Multiprocessor

  A multiprocessor system is an interconnection of two or more CPUs with memory and input-output equipment. The term processor in multiprocessor can mean either a CPU or an IOP. However, a system with a single CPU and one or more IOPs is usually not included in the definition of a multiprocessor system unless the IOP has computational facilities comparable to a CPU. As it is commonly defined, a multiprocessor system implies the existence of multiple CPUs, although there will be one or more IOPs as well.

The characteristics of Multiprocessor-

1. The operation of the entire system can be handled by one operating system, which gives necessary interaction between processors and their program in various level.

2. The multiprocessor system must have more than one processing element. The capabilities of all processing elements should be nearly same.

3. All input and output devices are shared by all processing elements.

4. All input and output channel are shared by all processing elements.

5. All processing elements are shared one common memory unit.