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Flynn's Taxonomy of Parallel Computers

Instruction Stream(s)

one

many

MISD

SISD

none in production

Von Neumann CPU

one

Data Stream(s)

SIMD

MIMD

E.g., vector processing units in current microprocessors

Almost all parallel computers!

Multiprocessors and multicomputers

many

Multicomputer

processor

multicore

core 0

core 1

core 2

core 3

core 0

core 1

core 2

core 3

core 0

core 1

core 2

core 3

core 0

core 1

core 2

core 3

cache

cache

interconnection network

I/O

memory

I/O

memory

I/O

message passing network

Example SIMD architecture

Multiprocessor

multicore

processor

core 0

core 1

core 2

core 3

core 0

core 1

core 2

core 3

cache

cache

interconnection network

I/O

memory

I/O

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