On Thu, Aug 15, 2019 at 2:34 PM Smith, Barry F. <bsm...@mcs.anl.gov> wrote:
> > Mark, > > I don't know how one uses it; we don't yet have an option in hypre.py > to turn it on. > Any ideas about when this might get done? > > You should just use regular PETSc matrices and vectors, not CUDA ones. > Hypre manages all that stuff internally for itsetl. > > I don't know how one knows if hypre is using the GPU or not, there are > some Nvidia profiling tools for tracking GPU usage, perhaps you can use > those to see if it says the GPU is being used. > I have just been timing it. It is very slow. 3x slower than GAMG/CPU and 20x slower than GAMG/GPU. But Hypers parameters tend to be optimized for 2D and I have not optimized parameters. But clearly its not using GPUs. > > Barry > > > > On Aug 15, 2019, at 10:47 AM, Mark Adams via petsc-dev < > petsc-dev@mcs.anl.gov> wrote: > > > > I have configured with Hypre on SUMMIT, with cuda, and it ran. I'm now > trying to verify that it used GPUs (I doubt it). Any ideas on how to verify > this? Should I use the cuda vecs and mats, or does Hypre not care. Can I > tell hypre not to use GPUs other than configuring an non-cude PETSc? I'm > not sure how to run a job without GPUs, but I will look into it. > > > > Mark > >
