[petsc-dev] ASM for each field solve on GPUs

Mark Adams mfadams at lbl.gov
Thu Dec 31 12:49:50 CST 2020

On Thu, Dec 31, 2020 at 1:12 PM Matthew Knepley <knepley at gmail.com> wrote:

> On Thu, Dec 31, 2020 at 12:46 PM Mark Adams <mfadams at lbl.gov> wrote:
>> Still missing something:
> You can get in the debugger in PCFieldSplitSetDefaults(), but the most
> likely thing is that pc->dm == NULL here,

the setuponblocks PC does have a DM and it is a cusparse mattype.

> so the PC is not getting the DM.
> This does make some sense as you are doing ASM, which is ripping up the
> domain, so you might not want the same DM on the subproblem. I
> am not sure what should be done here.
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