Nevermind, the first component of the arrays are too frequently used in PCBDDC.
So, I guess, the documentation should be updated by someone who knows what is
stored there.
Also, it’s not clear to me what would happened with a domain decomposition with
only non-connected subdomains.
If there are
Actually, I don’t think it is a bug, but rather an undocumented feature.
Someone clearly knew what they were doing when writing this:
https://www.mcs.anl.gov/petsc/petsc-current/src/vec/is/utils/isltog.c.html#line1379
The documents and the code indicate that nproc should be 1 in this case. So
there is a bug, if you are unable to determine the cause I can try to look at
it but have stones of things to do.
Barry
> On Aug 9, 2019, at 12:37 AM, Pierre Jolivet
> wrote:
>
> Again, with only 2 processes,
