On Fri, Jun 30, 2023 at 1:13 AM Ng, Cho-Kuen via petsc-users <
petsc-users@mcs.anl.gov> wrote:
> Mark,
>
> The application code reads in parameters from an input file, where we can
> put the PETSc runtime options. Then we pass the options to
> PetscInitialize(...). Does that sounds right?
>
PETSc
Hi,
I have no problem now in compiling, thank you for providing the Fortran
interface.
I have a follow up question.
When running the code, I get this error, which I’m pretty sure it is related to
DMDAGetElements(), since up to that line everything works fine.
[0]PETSC ERROR:
--
On Fri, Jun 30, 2023 at 6:47 AM Ngoc Mai Monica Huynh <
ngocmaimonica.hu...@unipv.it> wrote:
> Hi,
>
> I have no problem now in compiling, thank you for providing the Fortran
> interface.
> I have a follow up question.
> When running the code, I get this error, which I’m pretty sure it is
> relate
Hi,
I'm trying to run an iterative solver (FGMRES for example) with PCMG as
preconditioner. The setup of PCMG
is done roughly as in ex42 of the PETSc-tutorials
(https://petsc.org/main/src/ksp/ksp/tutorials/ex42.c.html).
Since I have many locked degrees-of-freedom I would like to use
PCREDISTRI
Yes, it compiles and run correctly
Monica
> On 30 Jun 2023, at 12:50, Matthew Knepley wrote:
>
> On Fri, Jun 30, 2023 at 6:47 AM Ngoc Mai Monica Huynh
> mailto:ngocmaimonica.hu...@unipv.it>> wrote:
> Hi,
>
> I have no problem now in compiling, thank you for providing the Fortran
> int
On Fri, Jun 30, 2023 at 8:38 AM Ngoc Mai Monica Huynh <
ngocmaimonica.hu...@unipv.it> wrote:
> Yes, it compiles and run correctly
>
Okay, then we try to alter that example until it looks like your test.
One thing is the #include at the top. Do you have that in your code? If
Fortran does not find
ex42.c provides directly the interpolation/restriction needed to move
between levels in the loop
for (k = 1; k < nlevels; k++) {
PetscCall(DMCreateInterpolation(da_list[k - 1], da_list[k], &R, NULL));
PetscCall(PCMGSetInterpolation(pc, k, R));
PetscCall(MatDestroy(&R));
}
The
Yes, I have the #include at the top of the code.
Thank you very much for your help.
I’ll let you know if I have any improvements from my side.
Looking forward to hearing from you.
Thanks,
Monica
> On 30 Jun 2023, at 15:08, Matthew Knepley wrote:
>
> On Fri, Jun 30, 2023 at 8:38 AM Ngoc
PetscCall(PetscInitialize(&argc, &argv, NULL, help)); gives us the args and
you run:
a.out -mat_type aijcusparse -vec_type cuda -log_view -options_left
Mark
On Fri, Jun 30, 2023 at 6:16 AM Matthew Knepley wrote:
> On Fri, Jun 30, 2023 at 1:13 AM Ng, Cho-Kuen via petsc-users <
> petsc-users@mcs
I glued your code fragment into a stand-alone program and it runs fine for me
on 16 ranks. Does this simple program run for you?
program main
#include
use petsc
implicit none
integer ierr
MPI_Comm comm
DM da3d
ISLocalToGlobalMapping map
PetscInt
Oh, I forgot to mention you should first check that the PCMG works quite
well for the full system (without the PCREDISTRIBUTE); the convergence
on the redistributed system (assuming you did all the work to get PCMG to work
for you) should be very similar to (but not measurably better) than th
Note that options like -mat_type aijcusparse -vec_type cuda only work if the
program is set up to allow runtime swapping of matrix and vector types. If you
have a call to MatCreateMPIAIJ() or other specific types then then these
options do nothing but because Mark had you use -options_left t
Thanks for the quick reply and the suggestions!
" ... you should first check that the PCMG works quite well "
Yes, the PCMG works very well for the full system.
"I am guessing that your code is slightly different than ex42.c because you
take the interpolation matrix provided by the DM
and give
On Fri, Jun 30, 2023 at 10:16 AM Carl-Johan Thore via petsc-users <
petsc-users@mcs.anl.gov> wrote:
> Thanks for the quick reply and the suggestions!
>
>
>
> “ … you should first check that the PCMG works quite well “
>
>
>
> Yes, the PCMG works very well for the full system.
>
>
>
> “I am guessin
Hi,
yes, it runs and now also my code.
I moved it from the extension .F to .F90.
(With my older codes the extension .F still works fine, but not with this one)
Thank you for the patience and support!
Monica
> On 30 Jun 2023, at 15:54, Barry Smith wrote:
>
>
> I glued your code fragme
On Fri, Jun 30, 2023 at 10:48 AM Ngoc Mai Monica Huynh <
ngocmaimonica.hu...@unipv.it> wrote:
> Hi,
> yes, it runs and now also my code.
> I moved it from the extension .F to .F90.
> (With my older codes the extension .F still works fine, but not with this
> one)
>
Yes, you need .F90 to properly
Barry, Mark and Matt,
Thank you all for the suggestions. I will modify the code so we can pass
runtime options.
Cho
From: Barry Smith
Sent: Friday, June 30, 2023 7:01 AM
To: Mark Adams
Cc: Matthew Knepley ; Ng, Cho-Kuen ;
petsc-users@mcs.anl.gov
Subject: Re:
Paul,
Thank you for your suggestion. I will try different spack install
specifications.
Cho
From: Grosse-Bley, Paul Leonard
Sent: Friday, June 30, 2023 4:07 AM
To: Ng, Cho-Kuen
Cc: petsc-users@mcs.anl.gov
Subject: Re: [petsc-users] Using PETSc GPU backend
Hi
> On Jun 30, 2023, at 10:22 AM, Matthew Knepley wrote:
>
> On Fri, Jun 30, 2023 at 10:16 AM Carl-Johan Thore via petsc-users
> mailto:petsc-users@mcs.anl.gov>> wrote:
>> Thanks for the quick reply and the suggestions!
>>
>>
>>
>> “ … you should first check that the PCMG works quite well “
Hello!
When I use PETSc build a sbaij matrix, I find a strange thing. When I
increase the number of processors, the assemble time become smaller. All
these are totally same matrix. The assemble time mainly arouse from message
passing, which because I use dynamic workload that it is random for whic
You cannot look just at the VecAssemblyEnd() time, that will very likely
give the wrong impression of the total time it takes to put the values in.
You need to register a new Event and put a PetscLogEvent() just before you
start generating the vector entries and calling VecSetValues() an
“Possibly, but if you are doing FD, then there is built-in topology in DMDA
that is not present in Plex, so
finding the neighbors in the right order is harder (possible, but harder, we
address this in some new work that is not yet merged). There is also structured
adaptive support with DMForest,
On Fri, Jun 30, 2023 at 12:08 PM Carl-Johan Thore
wrote:
> “Possibly, but if you are doing FD, then there is built-in topology in
> DMDA that is not present in Plex, so
>
> finding the neighbors in the right order is harder (possible, but harder,
> we address this in some new work that is not yet
Dear Petsc developers,
I am reading P2 mesh from GMSH. And used DMFieldGetClosure_Internal to
check the coordinates for each tetrahedron, It seems reasonable.
But when I tried DMGetCoordinates (dm, &global), it seems the vector
global is not consistent with the node number, Then what is global he
Hi,
Thanks for your reply. I try to use PetscLogEvent(), and the result
shows same conclusion.
What I have done is :
PetscLogEvent Mat_assemble_event, Mat_setvalue_event, Mat_setAsse_event;
PetscClassId classid;
PetscLogDouble user_event_flops;
PetscClassIdR
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