Process Time Comparison between GPU and CPU

Abhranil Das
Hamburger Sternwarte, Universitat Hamburg
Universitat Hamburg, 2011


   title={Process Time Comparison between GPU and CPU},

   author={Das, Abhranil},



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This report discusses a CUDA program to compare process times on a GPU and a CPU for a range of task size. The hardware compared are the NVIDIA Tesla C870 GPU and the quad-core Intel Xeon E5410 CPU. The operation is to compute the square root of an array. Due to GPU restrictions, the array size is fixed and the operation repeated to increase the task size. In the limiting case of long process times, the GPU emerges ~400 times faster.
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