Tuesday 25 February 2014

Meetings: Tuesday 25th February 2014

Discussed the results from attempting to parallelize the inner loop of the dijkstra application. Using cuda streams has resulted in a slow down of the application so further tests to determine why this is happening need to be carried out. Possible reason for this is that to simply create the streams on the GPU takes much longer than it does to simply evaluate an individual neighbour.

The paper 'A New GPU-based Approach to the shortest path problem' uses a similar method and reported a speedup of 220x, it may be worth while emailing and asking to see the source code to perform a comparison between their implementation and my own.

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