threads, fibers and GPU kernels

[Nicholas Wilson via Digitalmars-d]

On Monday, 7 August 2017 at 07:38:34 UTC, Suliman wrote:
> Modern GPU have thousands of GPU kernels, it's far from CPU 
> kernels, but it's interesting for me is there any chance that 
> in future they be used in same maner as CPU kernels?

Do you mean threads? Not really, they are more like SIMD lanes 
that together are more analogous to a CPU thread. See John 
Colvin's 2015/2016 DConf talks.

> If yes is there any reasons of exit for fibers? Or it would be 
> easier to map one thread to one kernel? On system with 1k 
> kernels/cores I do not see any reason for fibers for exiten.

Fibres are for I/O bound problems related to the overheads of 
task switching. They offer no benefits (unless you want stateful 
generators) for compute bound problems.

> Also here was few topics about D3. But what about about you are 
> thinging about threading model? I think in next 10 yers even 
> CPU would have 32-64 cores.