Comment 4 for bug 1088175

On Sun, Dec 9, 2012 at 2:01 PM, Anders Logg <email address hidden> wrote:
> On Sun, Dec 09, 2012 at 01:27:50PM -0000, Garth Wells wrote:
>> On Sun, Dec 9, 2012 at 1:20 PM, Anders Logg <email address hidden> wrote:
>> > I can take a look but object to the description. It is indeed written
>> > to work in parallel. It has also been tested to work in parallel
>> > before.
>> >
>>
>> Tested where?
>
> I thought the unit test was running fine on the buildbots but I see
> now it was never added to the list of tests (in the main test.py).
>

The unit test is a special case for which it may run on 3 processes
because the number of dofs is divisible by 3. In general, the parallel
layouts will not match.

Garth

> --
> Anders
>
>> It's clear from the code that it will only work in parallel for very
>> special cases.
>> Garth
>>
>> >
>> >
>> > On Sun, Dec 09, 2012 at 01:00:59PM -0000, Garth Wells wrote:
>> >> Public bug reported:
>> >>
>> >> LinearOperator is not written to work in parallel. It does not respect
>> >> the parallel layout of matrices and vectors. This leads to crashes.
>> >>
>> >> The unit test has been disabled in parallel.
>> >>
>> >> ** Affects: dolfin
>> >> Importance: Undecided
>> >> Assignee: Anders Logg (logg)
>> >> Status: New
>> >>
>> >> ** Changed in: dolfin
>> >> Assignee: (unassigned) => Anders Logg (logg)
>> >>
>> >
>> >
>> > Title:
>> > LinearOperator does not work in parallel
>> >
>> > To manage notifications about this bug go to:
>> > https://bugs.launchpad.net/dolfin/+bug/1088175/+subscriptions
>>
>
> --
> You received this bug notification because you are a member of DOLFIN
> Core Team, which is subscribed to DOLFIN.
> https://bugs.launchpad.net/bugs/1088175
>
> Title:
> LinearOperator does not work in parallel
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/dolfin/+bug/1088175/+subscriptions