Performance between elgImg map and cudaMalloc?

[AlfredNG]

I want know there is different of the two methods. Because I need to save a picture, which is faster?
The source is nvsurfacefd and map the eglimg, the dst is cudaMalloc or nvsurfacefd is better?
At last I will encoder the dst picture to jpg.
Thanks!

[DaneLLL]

Hi,
For using hardware JPEG encoder, we would suggest have frame data in NvBufSurface in YUV420/NV12. So that the loading is on VIC(hardware converter) and NVJPG engines.

[AlfredNG]

I mean， if I always malloc memory using NvBufSurf::NvAllocate and elgimg to cuda, does it let the cuda’s memory performance weaker?

[DaneLLL]

Hi,

@AlfredNG

I mean， if I always malloc memory using NvBufSurf::NvAllocate and elgimg to cuda, does it let the cuda’s memory performance weaker?

No. We would expect identical performance for allocating buffer through cudaMalloc() or
NvBufSurfaceAllocate()