[petsc-dev] MatAXPY with DIFFERENT_NONZERO_PATTERN

[Jed Brown]

MPI has some asinine semantics with MPI_Ops being used differently with
collectives and with one-sided. I pushed a fix yesterday.

On Mon, Apr 23, 2012 at 08:46, Alexander Grayver <agrayver at gfz-potsdam.de>wrote:

> On 23.04.2012 15:12, Jed Brown wrote:
>
>> My fault, now fixed:
>>
>> http://petsc.cs.iit.edu/petsc/**petsc-dev/rev/8a997a5a65d3<http://petsc.cs.iit.edu/petsc/petsc-dev/rev/8a997a5a65d3>
>>
>
> Jed,
>
> MatAXPY works fine, although during tests there was crash:
>
> Possible error running C/C++ src/snes/examples/tutorials/**ex19 with 2
> MPI processes
> See http://www.mcs.anl.gov/petsc/**documentation/faq.html<http://www.mcs.anl.gov/petsc/documentation/faq.html>
> lid velocity = 0.0016, prandtl # = 1, grashof # = 1
> [0]PETSC ERROR: PetscSplitReductionApply() line 328 in
> /home/lib/petsc-dev1/src/vec/**vec/utils/comb.c
> [0]PETSC ERROR: PetscSplitReductionEnd() line 247 in
> /home/lib/petsc-dev1/src/vec/**vec/utils/comb.c
> [0]PETSC ERROR: VecNormEnd() line 672 in /home/lib/petsc-dev1/src/vec/**
> vec/utils/comb.c
> [0]PETSC ERROR: SNESSolve_LS() line 172 in /home/lib/petsc-dev1/src/snes/*
> *impls/ls/ls.c
> [0]PETSC ERROR: SNESSolve() line 3458 in /home/lib/petsc-dev1/src/snes/**
> interface/snes.c
> [0]PETSC ERROR: main() line 151 in src/snes/examples/tutorials/**ex19.c
> [1]PETSC ERROR: PetscSplitReductionApply() line 328 in
> /home/lib/petsc-dev1/src/vec/**vec/utils/comb.c
> [1]PETSC ERROR: PetscSplitReductionEnd() line 247 in
> /home/lib/petsc-dev1/src/vec/**vec/utils/comb.c
> [1]PETSC ERROR: VecNormEnd() line 672 in /home/lib/petsc-dev1/src/vec/**
> vec/utils/comb.c
> [1]PETSC ERROR: SNESSolve_LS() line 172 in /home/lib/petsc-dev1/src/snes/*
> *impls/ls/ls.c
> [1]PETSC ERROR: SNESSolve() line 3458 in /home/lib/petsc-dev1/src/snes/**
> interface/snes.c
> [1]PETSC ERROR: main() line 151 in src/snes/examples/tutorials/**ex19.c
>
> --
> Regards,
> Alexander
>
>
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