Question

b)
Discuss Handler's classification based on
three distinct levels of computers.​

Answer 1

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★ Handler's classification addresses the computer at three distinct levels: Processor control unit PCU Arithmetic logic unit ALU• Bit-level circuit BLC The 'v' operator is used to indicate that the computer hardware can work in one of several modes.

Answer 2

answer:

In 1977, Wolfgang Handler proposed an detailed notation for expressing the parallelism and pipelining of computers. Handler's classification addresses the computer at three distinct stages:

Processor control unit (PCU),

Bit-level circuit (BLC),

Arithmetic logic unit (ALU),

Theprocessor control unit corresponds to a processor or CPU, the BLC corresponds to the logic circuit needed to perform one- bit operations in the ALU and the arithmetic logic unit corresponds to a functional unit or a processing element.

Handler's classification uses the following three pairs of integers to explain a computer: Computer = (p * p', a * a', b * b')

Whereas, p = number of PCUs

Whereas, p'= number of PCUs that can be pipelined

Whereas, a = number of ALUs controlled by each PCU

Where a'= number of ALUs that can be pipelined

Whereas, b = number of bits in ALU or processing element (PE) word

Whereas, b'= number of pipeline segments on all ALUs or in a single PE

The following operators and rules are used to show the relationship between a variety of elements of the computer:

The '*' operator is used to indicate that the units are pipelined or macro-pipelined with a stream of data running through all the units.

The '+' operator is used to denote that the units are not pipelined but work on independent streams of data.

The 'v' operator is used to denote that the computer hardware can work in one of numerous modes.

The '~' symbol is used to specify a range of values for any one of the parameters.

Peripheral processors are given away before the main processor using another three pairs of integers. If the given value of the second element of any pair is 1, it may misplaced for brevity.

Handler's classification is the best elaborate by showing how the operators and rules are used to classify numerous machines.

The CDC 6600 has only a single main processor supported by 10 I/O processors. One control unit managed one ALU with a 60-bit word length. The ALU has 10 functional units which can be produced into a pipeline. The 10 peripheral I/O processors may work in parallel with the CPU and with each other also. Every I/O processor contains one 12-bit ALU. The explanation for the 10 I/O processors is:

CDC 6600I/O = (10, 1, 12)

The explanation for the main processor is:

CDC 6600main = (1, 1 * 10, 60)

The I/O processors and the main processor can be regarded as forming a macro-pipeline so the '*' operator is used to join the two structures:

CDC 6600 = (central processor) *(I/O processors) = (10, 1, 12) * (1, 1 * 10, 60)