PRAM model of Parallel Computation
Written by Abhishek Ghosh
A PRAM consists of a control unit, global memory, and an unbounded set of processors,each with its own private memory. Processors are identified by an index, the value of which can be used to enable or disable the processor or change the memory locations which it can access. Active processors will usually execute identical instructions.
A PRAM computation begins with the input stored in global memory and a single active processing element. In every step of execution, an enabled processor will do either of the following two :
- Activate another processor.
- Read a value from a single private or global memory location, perform a single RAM operation, and write into one local or global memory location.
Every active, enabled processor executes the same instructions (on different memory locations).
The processing stops only when the last processor has finished its task. Some different types of PRAM architectures are described here.
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Comments
but you should also include the definition of PRAM model
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