CUDA defaults meaning?

[kkkrackpot]

Hi,

    --cuda-block-size Set the CUDA block work size. Default is 128
    --cuda-grid-size Set the CUDA grid size. Default is 8192

What exactly these defaults mean?

A block has 128 threads, and the grid has 8192 such blocks (i.e. 128*8129 threads totally)?

I'm not that good at CUDA, sorry...

Regards,
Alex

[cedricwalter]

you dont want --cuda-block-size too high, this is the number of registers available to each thread,you want it just big enough to do its work so you can put more streams in parallell

[kkkrackpot]

@cedricwalter by more streams in parallel you mean --cuda-streams option?

[DeadManWalkingTO]

I think this issue can be closed.