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88 bytes removed, 19:17, 16 April 2018

→‎Assignment3

==Assignment3==

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

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

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

~~"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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