Re: [Starpu-devel] initialised SCRATCH buffer

[Samuel Thibault <samuel.thibault@ens-lyon.org>]

Xavier Lacoste, le Thu 05 Jan 2012 11:10:49 +0100, a écrit :
> Yes this is what I mean this array depends on parameters of the task.
> It is build from the bloc number and the whole sparse matrix structure which
> are given through cl->args.
> The bloc number is on the computing device but the sparse matrix is just a
> pointer to the data and the GPU can't see what is pointed to as it is not
> copied.
> 
> Yes I could build the array in my codelet using my cl->args, then send it to
> the GPU.

So you mean that initialization can only be performed on a CPU? Isn't it
possible you create a task just for it? That will declare the CPU-only
computation time, and still let StarPU perform the transfer as it sees
fit.

Samuel