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Granularity
In 'Parallel computing', Granularity can be defined as a qualitative assess of the ratio of computation to communication.
1) Coarse Granularity- relatively huge amount of computational work is done among communication events.
2) Fine Granularity- relatively little amount of computational work is done between communication events.
3) Observed Speedup- Observed speedup of a code, which has been parallelized, is termed as:
(Wall-clock time of serial) / (wall-clock time of parallel)
Granularity is one of the simplest and most extensively used indicators for parallel program's performance.
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