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150 bytes added, 19:14, 16 April 2018

→‎Assignment3

==Assignment3==

While working on the project, we discovered that cudaMemcpy(HtoD) and (DtoH) takes long time.

~~Use~~ so, we decided to use pinned memory instead of pageable memory cudaHostAlloc();

"It cudaHostAlloc() will allocate pinned memory which is always stored in RAM and can be accessed by GPU's DMA(direct memory access) directly"

[[File:Resultone.png|500px|thumb|left|pinned memory vs pageable memory]]

using pinned memory is 2 times faster than pageable memory

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