Re: [Starpu-devel] Performance with SOCL on multiple devices

[Samuel Thibault <samuel.thibault@inria.fr>]

Samuel Thibault, on Wed 06 Jan 2016 17:03:42 +0100, wrote:
> With these changes, I do see kernels running on various GPUs. It does
> not seem faster, but that is probably due to data transfers.

And also serialized kernels

> You will probably want to use FxT to dump traces and read them with
> Vite.

It notably seems that the DGMacroCellInterface kernels are completely
serialized, thus awfully bad performance due to no parallelism and
data transfers :) DGFlux does get parallelized, on the other hand. The
duration is however quite tiny (60µs), so it's really not efficient
compared with the runtime overhead.

Samuel